NOISE REDUCTION IN GEAR TRAIN
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The document discusses methods for reducing noise in a gear train. It identifies sources of noise such as worn teeth and backlash. It then presents several component-oriented concepts for reducing noise, such as using scissors gears, torsion springs, or gears with elastomeric material between them. It also discusses selecting appropriate gear materials and redesigning the gear train layout, such as using fewer gears or bevel gears, to reduce noise.
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Critical speed of shaft
1) The shaft carries a disc that is eccentrically mounted, subjecting the shaft to bending stresses from centrifugal force as it rotates.
2) The critical speed is the speed at which the additional deflection from bending becomes infinite, causing high vibrations and potential failure.
3) Other factors that determine the critical speed include the distance between the center of gravity of components and the axis of rotation, as well as the speed of rotation.
Belts and Rope Drives
P=250 kW
N1=300 rpm
D1=1.2 m
θ=π rad
β=22.5°
d=50 mm
m=1.3 kg/m
Pmax=2.2 kN
μ=0.3
Overhang=0.5 m
Shear stress=40 MPa
The document discusses various types of belt and rope drives used to transmit power between rotating shafts. It describes different belt materials, types of belts, components of belt drives, factors affecting power transmission, and applications. It also covers rope drives, materials used for ropes, advantages and disadvantages of rope drives, and considerations in selecting wire ropes
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Propeller shaft
The propeller shaft transmits power from the gearbox to the rear differential. It includes U-joints and a slip joint to adjust for length changes over bumps. There are two main types of propeller shaft: the torque tube type, which fully encloses the shaft in a hollow tube connected to the rear axle housing, and the Hotchkiss type, which absorbs torque through the rear leaf spring using a shaft with universal joints and a sliding joint. Propeller shafts must be dynamically balanced, made of hardened steel to withstand torque loads, and designed to avoid resonance at high speeds.
Design of Roller Chain Drive theory by Prof. Sagar A. Dhotare
This covers following Points
1. Introduction.
2. Advantages and Disadvantages of Chain Drive over Belt or Rope Drive.
3. Terms Used in Chain Drive.
4. Relation Between Pitch and Pitch Circle Diameter.
5. Velocity Ratio of Chain Drives.
6. Length of Chain and Centre Distance.
7. Classification of Chains.
8. Hoisting and Hauling Chains.
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10. Power Transmitting Chains.
11. Characteristics of Roller Chains.
12. Factor of Safety for Chain Drives.
13. Permissible Speed of Smaller Sprocket.
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15. Number of Teeth on the Smaller or Driving Sprocket
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Recommended
Critical speed of shaft
1) The shaft carries a disc that is eccentrically mounted, subjecting the shaft to bending stresses from centrifugal force as it rotates.
2) The critical speed is the speed at which the additional deflection from bending becomes infinite, causing high vibrations and potential failure.
3) Other factors that determine the critical speed include the distance between the center of gravity of components and the axis of rotation, as well as the speed of rotation.
Belts and Rope Drives
P=250 kW
N1=300 rpm
D1=1.2 m
θ=π rad
β=22.5°
d=50 mm
m=1.3 kg/m
Pmax=2.2 kN
μ=0.3
Overhang=0.5 m
Shear stress=40 MPa
The document discusses various types of belt and rope drives used to transmit power between rotating shafts. It describes different belt materials, types of belts, components of belt drives, factors affecting power transmission, and applications. It also covers rope drives, materials used for ropes, advantages and disadvantages of rope drives, and considerations in selecting wire ropes
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This covers following Points
1. Introduction.
2. Advantages and Disadvantages of Chain Drive over Belt or Rope Drive.
3. Terms Used in Chain Drive.
4. Relation Between Pitch and Pitch Circle Diameter.
5. Velocity Ratio of Chain Drives.
6. Length of Chain and Centre Distance.
7. Classification of Chains.
8. Hoisting and Hauling Chains.
9. Conveyor Chains.
10. Power Transmitting Chains.
11. Characteristics of Roller Chains.
12. Factor of Safety for Chain Drives.
13. Permissible Speed of Smaller Sprocket.
14. Power Transmitted by Chains.
15. Number of Teeth on the Smaller or Driving Sprocket
or Pinion.
16. Maximum Speed for Chains.
17. Principal Dimensions of Tooth Profile.
18. Design Procedure for Chain Drive.
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Belt drive. ppt
Like Comment and download
Belt is a Flexible Mechanical element that transmit power from one shaft to another
Belt is a Flexible Mechanical element that transmit power from one shaft to another
Gear Train
Ex: Automobile, engines etc.
Chain Drive
Ex : Bi-cycle , Motor cycle etc.
Belt Drive
Ex: Rice mills, sewing machine etc.
Rope Drive
Ex: lift, crane etc
NOISE REDUCTION IN GEAR TRAIN
The document discusses methods for reducing noise in a gear train. It identifies sources of noise such as worn teeth and backlash. It then presents several component-oriented concepts for reducing noise, such as using scissors gears, torsion springs, or gears with elastomeric material between them. The document also discusses selecting appropriate gear materials and redesigning the gear train layout, such as using fewer gears or bevel gears, to reduce noise.
my seminor report on turbine
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BAJA SAE INDIA 2015
1. The document outlines the design specifications and rules for an all-terrain vehicle (ATV) racing competition. It includes requirements for dimensions, materials, driver safety, speeds, and allowed pre-fabricated parts.
2. Detailed specifications are provided for the vehicle's 10HP engine, roll cage made of chromoly steel, dimensions, weights, double wishbone front and rear suspension systems, rack and pinion steering, disc brakes, and 4-speed transmission.
3. Performance targets include minimum weight, desirable traction, maximum gradeability, reduced rolling resistance, and optimized braking. 2D drawings and 3D models illustrate the vehicle design.
Unit 2 : Suspension System
The document provides information on vehicle suspension systems. It discusses the key components of a suspension system including springs, dampers, and linkages. The goals of a suspension system are to contribute to vehicle handling/braking performance while keeping occupants comfortable by isolating them from road bumps and noise. The suspension supports the vehicle's weight, provides a smooth ride, and protects the vehicle from damage. Common types of suspension systems include dependent systems that link the two wheels and independent systems where each wheel can move independently. Key aspects like sprung mass, unsprung mass, suspension types, and springs are also summarized.
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The document discusses hydraulic power steering systems. It begins by introducing steering and different steering mechanisms. It then explains the basic components and working of a hydraulic power steering system. The key components are a hydraulic control valve, pinion gear, hydraulic pressure and return lines, hydraulic piston, and rack housing. It works by using a pump driven by the engine to create hydraulic pressure which assists the driver's steering efforts through a piston. This makes steering easier and safer while absorbing road shocks.
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The wheel assembly consists of the hub, disc or spokes, rim, tyre & tube.Wheels is the important part of the vehicle. The vehicle can’t move on the road without wheels. “ The wheels are legs of the vehicle carry it to far off distance. The support of the whole weight of the vehicle & convert rotary motion into longitudinal one".
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(2) Grease lubrication applies grease directly but requires periodic reapplication. Splash lubrication risks insufficient lubrication from low oil levels or overheating from high levels. Forced circulation ensures lubricant reaches contact areas through spraying or misting.
(3) The purpose of gear lubrication is to reduce friction through lubricant film formation and limit temperature rises from rolling and sliding contact. Proper lubricant selection depends on operating conditions like speed and load.
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A bearing is a machine element that supports another moving element, known as a journal, and allows relative motion between their surfaces while carrying loads. There are two main types of bearings: sliding contact bearings and rolling contact bearings. Sliding contact bearings include journal or sleeve bearings, which support radial loads and come in full or partial designs. Rolling contact bearings use balls or rollers between surfaces to reduce friction. Key considerations in bearing design include load capacity, friction, lubrication, and heat dissipation.
Bearing
A bearing is a device that supports load and reduces friction between moving parts. There are two main types: plain/slider bearings and rolling/anti-friction bearings. Rolling bearings use balls or rollers to create separation between surfaces and are more commonly used. Common bearing materials include metals, alloys, and some non-metals. Bearings must be properly selected, mounted, lubricated, and maintained to maximize their lifespan and prevent premature failure.
Bearing
1. Bearings are components that allow parts in a machine to move smoothly against each other. There are two main types: sliding bearings which use lubrication between sliding surfaces, and rolling element bearings which use balls or rollers to minimize friction.
2. Thrust bearings are a type of rolling element bearing designed to support high axial loads on a shaft. Common varieties include ball, roller, and tapered roller thrust bearings.
3. Bushings are plain bearings that can be inserted into a housing to provide a bearing surface, and come in solid, split, or clenched designs to accommodate rotation.
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This document provides an overview of the design of transmission systems using flexible elements such as belts, ropes, and chains. It discusses the selection and design of v-belts and pulleys, wire ropes, transmission chains and sprockets. Assessment methods for the course include common assessment tests, written assignments, gamification, active learning, and group presentations. Flexible elements are used to transmit mechanical power over comparatively long distances and for conveying purposes. Proper selection and replacement of these elements is important to prevent deterioration.
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The document discusses bearing failure analysis, including classifying failure modes, potential causes of premature failure, and how to properly analyze failed bearings. It provides an overview of a training on bearing failure analysis, which examines damaged bearings to determine the root cause of failure. The training aims to help experts classify failure modes and identify causes like lubrication issues, mechanical damage, or material defects. It also outlines best practices for securing evidence from failed bearings to facilitate accurate analysis.
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The document provides an overview of the design of internal combustion (IC) engine components. It discusses the operating principles of two-stroke and four-stroke engines. The principal parts of an IC engine are described including the cylinder, piston, connecting rod, crankshaft, and valve gear mechanism. Design considerations for cylinders, pistons, and other components are outlined. Parameters like bore size, cylinder wall thickness, piston ring design are discussed in relation to withstanding pressure and heat dissipation. Common materials used for different parts are also mentioned.
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This document discusses the design of a rack and pinion gear system for a railway crossing gate. It outlines the objectives, need, and basic mechanism of a rack and pinion gear. The design methodology is explained, including design considerations, calculations, and material selection. Equations for determining forces on gear teeth, surface speed, strength, and wear are provided. Finally, the document summarizes the preliminary design of the pinion gear and next steps to design the rack.
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This document provides an overview of bearing manufacturing by Benara Udyog Limited. It discusses the company background, types of bearings including sliding contact bearings and rolling contact bearings. The key types of rolling contact bearings are described as ball bearings, rolled bearings, and thrust ball bearings. The document then outlines the manufacturing process for ball bearings, including cutting, deflashing, heat treating, and assembly steps. It concludes by thanking the Mechanical Department for their guidance and assessment.
4 independed suspension system
This document describes five main types of independent suspension systems: 1) MacPherson strut, 2) Wishbone, 3) Vertical guide, 4) Trailing link, and 5) Swinging half axles. It provides details on each system, including components, how they function, advantages and disadvantages. For example, it explains that the MacPherson strut system uses a lower wishbone and strut with shock absorber/coil spring to position the wheel. This system provides maximum engine compartment space and is commonly used in front-wheel drive cars.
Belt drive. ppt
Like Comment and download
Belt is a Flexible Mechanical element that transmit power from one shaft to another
Belt is a Flexible Mechanical element that transmit power from one shaft to another
Gear Train
Ex: Automobile, engines etc.
Chain Drive
Ex : Bi-cycle , Motor cycle etc.
Belt Drive
Ex: Rice mills, sewing machine etc.
Rope Drive
Ex: lift, crane etc
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The document discusses methods for reducing noise in a gear train. It identifies sources of noise such as worn teeth and backlash. It then presents several component-oriented concepts for reducing noise, such as using scissors gears, torsion springs, or gears with elastomeric material between them. The document also discusses selecting appropriate gear materials and redesigning the gear train layout, such as using fewer gears or bevel gears, to reduce noise.
my seminor report on turbine
The document describes the design and applications of different types of turbines. It provides an overview of the history and development of turbines, including early steam turbines invented by de Laval and Parsons. It then classifies turbines into categories such as hydraulic, steam, gas, and wind turbines. For each type, it discusses the basic theory of operation, examples, and efficiency. Hydraulic turbines are further divided into reaction and impulse types with examples like the Francis, Kaplan, and Pelton turbines. The document aims to inform about the different designs and uses of turbines.
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References:-
1. Theory of Machines by R.S.Khurmi and J.K.Gupta
SAE STANDARD J/ISO 10567
The document contains 11 repetitions of the copyright line "Copyright by the SAE International Fri Apr 15 01:41:16 2011". It asserts copyright ownership over the content by the SAE International organization and provides the date and time of copyright.
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This presentation discusses epicyclic gear trains and their applications. It begins by defining an epicyclic gear train as one where the axes of gears can move relative to a fixed axis. Examples of applications include differentials in automobiles and lathes. It then discusses methods to calculate velocity ratios in epicyclic gear trains using tabular and algebraic methods. Compound epicyclic gear trains using sun and planet gears are described. Epicyclic gear trains using bevel gears are also discussed, along with examples of their use in speed reduction gears and differentials. Finally, the presentation covers torques in epicyclic gear trains and how input, output, and holding torques are related.
Epicyclic gear train
An epicyclic or planetary gear system consists of one or more planet gears that revolve around a central sun gear. The planet gears are mounted on a carrier that can also rotate relative to the sun gear. An outer ring gear meshes with the planet gears. Epicyclic gearing allows for large gear ratios in a small space through the planetary motion of gears revolving and rotating simultaneously. Applications include marine gearboxes, electric screwdrivers, lathe back gears, hoists, pulley blocks, wristwatches, bicycle transmissions, and automobile transmissions.
textile composites and its application
This document provides an overview of composite materials. It defines composites as materials made of two or more constituent materials with distinct properties. Composites consist of a reinforcement material embedded in a matrix to hold the reinforcements together. Common reinforcements include fibers, particles or flakes. The matrix materials are typically polymers, metals or ceramics. The document discusses various types of composites and their applications in areas like transportation, aerospace, sports equipment and infrastructure. Composites offer advantages like high strength, stiffness and corrosion resistance combined with lighter weight.
Gear trains
Unit 7-gear trains, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Lean Manufacturing
The document provides background information on lean manufacturing and the Toyota Production System. It summarizes that traditional manufacturing systems have high inventory levels and long lead times, while lean systems based on Toyota aim to reduce waste and optimize flow. The core of lean is the Toyota Production System (TPS) which treats all processes as experiments to continuously improve. TPS creates a "community of scientists" using the scientific method to solve problems at all levels.
Latest Seminar Topics for Engineering,MCA,MSc Students
Latest Seminar Topics on IEEE Topics with free PPT download for ECE, CSE, EEE, Mechanical and Civil Engineering and MCA Students
Lean presentation ppt
The document discusses lean manufacturing, which aims to eliminate waste and improve efficiency. It describes key lean techniques like 5S, single minute exchange of dies (SMED), kanban, and cellular manufacturing. The benefits of lean include increased productivity and quality while reducing costs, space, lead times, and inventory. People are an important part of lean success through continuous learning and commitment. Customers also benefit from lean through faster, more reliable delivery of the exact products they want.
Types of turbine & thier application
Turbines extract energy from moving fluids and convert it to rotational energy. The main types are water, steam, gas, and wind turbines. Water turbines include impulse turbines like Pelton and cross-flow, which use jet velocity, and reaction turbines like Francis and Kaplan, which use changing fluid pressure. Steam turbines convert thermal energy from pressurized steam. Gas turbines power aircraft and generators using combustion. Wind turbines have rotors to capture kinetic wind energy and generators to produce electricity. Turbines are used widely in power generation and industrial applications.
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Latest Seminar Topics for Engineering,MCA,MSc Students
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Similar to NOISE REDUCTION IN GEAR TRAIN
PED 2016 - Design 101 - Week 2 - Handouts
Design 101
http://goo.gl/wIql8w
Week 2
Machine Element Design New Approach
Course Objective
===============
This is a fundamental course to discuss the criteria of Mechanical Design for both machine elements design and product design .
The course will discuss the design as a process in making a lot of products by terms of manufacturing , sustainability and environmental aspects
The Course is online and free to all
Instructor
Mohamed Mostafa Adam
This course was presented by PED 2016
Production Engineering Department - Faculty of Engineering - Alexandria University - Egypt
Ijrdt 140001
This document describes the design, analysis, and performance evaluation of a mechanical gyrator vehicle. A mechanical gyrator is a three-wheeled vehicle with two large outer wheels and an inner frame that can oscillate. The document outlines the subsystems of the gyrator such as the wheels, chassis, transmission, seat, and electrical system. It discusses the material selection, modeling, and analysis done to optimize the design. The goal was to develop an efficient personal transportation vehicle for disabled individuals that is stable, easy to operate, and has a low turning radius.
Design, analysis and performance evaluation of a mechanical gyrator
The project focuses on the development of an efficient and safe system for navigation for disabled people. Such a system should enable the user to control with minimum effort and should be stable in all practical situations. A gyrator is neither a motorcycle nor a four wheeler. It is a vehicle made up of an inner frame which is encompassed and supported by two large coaxially aligned wheels. The inner frame is supported by a common axle as a result, is free to oscillate back and forth relative to outer wheels. The inherent instability has limited its potential as a commercially available vehicle. But by reducing this oscillation to an optimum value by incorporating internal braking, we could make a very stable navigation system. In order to achieve motion, a shift in the centre of gravity of the inner frame is required. Two independent electric motors provide the driving torque to gearbox which drives the large outer wheels. This unique design gives the vehicle a clear advantage over conventional 4wheeled and 2wheeled vehicles as it has zero turning radius. Key word:- Inflation Pressure, Pressure switch ,Pressure guage, Solenoid control valve, DC Compressor.
Carlisle - Introduction to Synchronous Belts.ppt
Synchronous belts were invented in the 1940s to synchronize shafts on sewing machines. They have since been widely adopted due to advantages over other transmission methods like gears, chains, and V-belts. Synchronous belts engage teeth in a smooth, rolling motion for precise synchronization without slippage. Modern belts use high-strength fiberglass or aramid cords and molded rubber teeth for durability and power transmission in a variety of industrial applications.
EFFicycle 2013
The team designed an eco-friendly three-wheeled vehicle called Efficycle for the EFFI-CYCLE 2013 competition. [1] They focused on simplicity, efficiency, ergonomics and safety while keeping the design affordable. [2] Key aspects of the design included a durable 1018 steel roll cage, BLDC motor and lithium battery power train, disc brakes, front and rear suspension, and an under-seat steering system. [3] Extensive analysis and testing was conducted to validate the design.
Creative journal
This document discusses the design of a gearbox to maximize lifting power using limited space and materials. It considers using planetary gears but finds the design too complex and difficult to construct. The proposed design uses a series of spur gears inside an acrylic housing. Key features include using spacers between gears to reduce friction, optimizing gear shapes to reduce inertia, and pinning and gluing gears for strength and alignment. Testing will be done to evaluate the efficiency of the final design. The gearbox aims to maximize lifting power using multiple gear reductions within the strict space and material constraints.
IRJET- Dynamic Analysis of the Front and Rear Suspension System of an All...
This document describes the design and analysis of the front and rear suspension systems for an all-terrain vehicle (ATV). It discusses using a double wishbone suspension in the front for steering control and an H-arm suspension in the rear for load bearing capacity and control of camber and toe. The design process considers factors like geometry, material selection, force analysis, and damper and spring selection and tuning. The goals of the suspension design are to provide maximum traction, control, comfort, and stability over rough terrain.
Analysis of a Drive Shaft for Automobile Applications
This study deals with optimization of drive shaft using the ANSYS. Substitution of Titanium drive shafts over the conventional steel material for drive shaft has increasing the advantages of design due to its high specific stiffness, strength and low weight. Drive shaft is the main component of drive system of an automobile. Use of conventional steel for manufacturing of drive shaft has many disadvantages such as low specific stiffness and strength. Many methods are available at present for the design optimization of structural systems. This paper discusses the past work done on drive shafts using ANSYS and design and modal analysis of shafts made of Titanium alloy (Ti-6Al-7Nb).
Material Optimization and Weight Reduction of Drive Shaft Using Composite Mat...
The objective of the drive shaft is to connect with the transmission shaft with the help of universal joint whose axis intersects and the rotation of one shaft about its own axis results in rotation of other shaft about its axis. Shafts must be exceptionally tough and light to improve the overall performance of the vehicle. Automobile industries are exploring composite materials in order to obtain reduction of weight without significant decrease in vehicle quality and reliability. This is due to the fact that the reduction of weight of a vehicle directly impacts its fuel consumption. Particularly in city driving, the reduction of weight is almost directly proportional to fuel consumption of the vehicle. Also at the start of vehicle the most of the power get consumed in driving transmission system, if we able to reduce the weight of the propeller shaft that surplus available power can be used to propel the vehicle. Thus, in this paper, the aim is to replace a two-piece metallic drive shaft by a composite drive shaft. The following materials can be chosen Steel, Boron/Epoxy Composite, Kevlar/Epoxy Composite, Aluminum – Glass/Epoxy Hybrid, Carbon – Glass/Epoxy Hybrid. The analysis was carried out for three different ply orientations of the composites in order to suggest the most suitable ply orientation of the material that would give the maximum weight reduction while conforming to the stringent design parameters of passenger cars and light commercial vehicle.
REPORT - MACH8
The document summarizes a project to design a three-wheeled vehicle that can be driven by two riders simultaneously or alternately using electricity or pedaling. It details the vehicle design, estimated costs, team structure and timeline. Key aspects of the design include a full suspension system, safety features like lights, and a speedometer. The feasibility analysis considers factors like ergonomics, comfort, handling and the environmentally friendly electric design.
Zero Turn Radius Presentation - Team Panache
The document describes the design of a zero-turn radius system for a John Deere 5065E tractor. The system uses hydraulic tie rods attached to a double-acting cylinder to enable the rear wheels to rotate independently, allowing the tractor to turn within its own width. Calculations are shown for sizing the steering and tie rod cylinders and rods. The design also incorporates a hydrostatic transmission system to provide infinitely variable speed control for the rear wheels to facilitate zero-turn maneuvers. Performance simulations and a cost analysis are presented to evaluate the technical feasibility and cost-effectiveness of the zero-turn design.
Gear
Gears are used to transmit power between two shafts. Spur gears have parallel teeth and are used to connect parallel shafts. Helical gears have teeth inclined to the axis which increases load capacity and reduces noise compared to spur gears. Bevel gears are used for intersecting shafts with teeth formed along truncated cones. Worm gears consist of a worm and wheel used to connect non-parallel, non-intersecting shafts and can provide high speed ratios up to 300:1. Different gear materials, manufacturing methods, and potential failure modes are discussed.
Creativity Journey Presentation
The document discusses gearbox design options for lifting an 8 kg weight using an acrylic gearbox. It analyzes spur gears, planetary gears, helical gears, worm gears, clutches, bevel gears, and bearings. Spur gears are recommended due to their simplicity, efficiency, ability to reduce size and mass, and feasibility for laser cutting acrylic. Multiple reduction gear trains and a centrifugal clutch may be used to minimize motor load. The goal is to optimize gear and housing configuration to lift the weight while keeping the design compact and motor operating at peak efficiency.
Vehicle Power transmission
this presentation will give you an overview of automobile power transmission component like flywheel, clutch, differential etc.
automobile power transmission
Power transmission involves moving energy from where it is generated to where it is applied. The first link is the flywheel, which stores rotational energy and resists changes in speed. Problems with flywheels include high mass and rotational inertia. Solutions include using minimum diameter flywheels and materials like aluminum that have low mass and maximum strength. Differentials distribute engine torque to both wheels but allow them to spin at different speeds, while locking differentials restrict both wheels to the same speed regardless of traction.
Material optimization and analysis of Composite propeller shaft and its behav...
This document summarizes a research paper that analyzes and optimizes the design of an automobile propeller shaft made of composite materials. The current steel propeller shaft is modeled and analyzed using finite element analysis software. The analysis is conducted under torsional and bending loads. Alternative materials like aluminum alloy and carbon fiber are also analyzed and compared to steel. The results show that composite materials like carbon fiber can increase strength while reducing weight compared to steel. The research aims to select the best material to replace steel and increase the torsional strength and reduce the weight of the propeller shaft.
Material optimization and analysis of Composite propeller shaft and its behav...
This document summarizes a research paper that analyzes and optimizes the design of an automobile propeller shaft made of composite materials. The current steel propeller shaft is modeled and analyzed using finite element analysis software. The analysis is conducted under torsional and bending loads. Alternative materials like aluminum alloy and carbon fiber reinforced polymer are also analyzed and compared to steel in terms of stresses developed and deformations. The goal of the research is to reduce the weight of the propeller shaft while maintaining its strength through the use of composite materials.
Power Transmission- Southeast University department of Textile Engineering
This document discusses various methods of power transmission, including belt drives, gear drives, chain drives, and rope drives. It provides definitions and classifications for each method. Belt drives can be classified by distance between pulleys, material, and power/speed. Gear drives can be classified by position of axes, peripheral velocity, and type of gearing. Chain drives are classified by usage. Rope drives use fiber or wire ropes. Each method has advantages like efficiency and flexibility, as well as disadvantages like noise and required maintenance. The document concludes that power transmission allows motion from one location to drive other mechanisms and alter characteristics like torque and speed.
Literature Review on Simulation and Analysis of Timing Chain of an Automotive...
The current trend in automotive industry is to achieve compact, efficient, reliable systems. Engine timing drives
used in engines are one of the most critical systems. Timing belts are subjected to excessive elongation and
wear, while timing gears contribute excess mass and inertia in the system. Hence timing chains are preferred
widely, in various high performance engines. Chain drives are easy to assemble and adjust, highly efficient,
durable, reliable, compact and capable of attaining a wide range of power and speed capacities. In spite of these
advantages their complex dynamic behaviour is not well researched. With the improvement of the speed and
load of the automotive engine, and silent chain technology, as silent chain has a compact structure, high
transmitting efficiency, high reliability and high wear resistance, its vibration and noise is low, and the silent
chain have the advantage of life-long maintenance-free, it significant overcomes the gear drive and belt drive
performance, therefore, the silent chain is increasingly widely used in automotive engine timing system. In this
present review dynamic analysis as well as analysis of automotive engines timing silent chain system are
studied
IRJET-Design & Fabrication of Rear Outboard Wheel Assembly for an ATV
This document describes the design and fabrication of a rear outboard wheel assembly for an all-terrain vehicle (ATV). It discusses the design of key components like the wheel hub, upright, and caliper mounting plate. Finite element analysis was performed to optimize the design of each component for strength and weight reduction. The wheel hub was designed from EN8 steel to withstand forces up to 6000N. The upright was designed from aluminum 6061 to be lightweight while sustaining loads of 6000N. Mild steel was used for the caliper mounting plate. Prototypes of each component were manufactured using various processes like CNC machining and tested on the ATV, validating the design.
Similar to NOISE REDUCTION IN GEAR TRAIN (20)
Design, analysis and performance evaluation of a mechanical gyrator
Design, analysis and performance evaluation of a mechanical gyrator
IRJET- Dynamic Analysis of the Front and Rear Suspension System of an All...
IRJET- Dynamic Analysis of the Front and Rear Suspension System of an All...
Analysis of a Drive Shaft for Automobile Applications
Analysis of a Drive Shaft for Automobile Applications
Material Optimization and Weight Reduction of Drive Shaft Using Composite Mat...
Material Optimization and Weight Reduction of Drive Shaft Using Composite Mat...
Material optimization and analysis of Composite propeller shaft and its behav...
Material optimization and analysis of Composite propeller shaft and its behav...
Material optimization and analysis of Composite propeller shaft and its behav...
Material optimization and analysis of Composite propeller shaft and its behav...
Power Transmission- Southeast University department of Textile Engineering
Power Transmission- Southeast University department of Textile Engineering
Literature Review on Simulation and Analysis of Timing Chain of an Automotive...
Literature Review on Simulation and Analysis of Timing Chain of an Automotive...
IRJET-Design & Fabrication of Rear Outboard Wheel Assembly for an ATV
IRJET-Design & Fabrication of Rear Outboard Wheel Assembly for an ATV
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Chemical engineering and electronics engineering and chemical development of the day of the almighty paw paw paw
一比一原版(USF毕业证)旧金山大学毕业证如何办理
原件一模一样【微信：95270640】【旧金山大学毕业证USF学位证成绩单】【微信：95270640】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：95270640】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：95270640】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份【微信：95270640】
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】外观非常精致，由特殊纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理旧金山大学毕业证USF学位证毕业证学位证【微信：95270640 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
OOPS_Lab_Manual - programs using C++ programming language
This manual contains programs on object oriented programming concepts using C++ language.
Accident detection system project report.pdf
The Rapid growth of technology and infrastructure has made our lives easier. The
advent of technology has also increased the traffic hazards and the road accidents take place
frequently which causes huge loss of life and property because of the poor emergency facilities.
Many lives could have been saved if emergency service could get accident information and
reach in time. Our project will provide an optimum solution to this draw back. A piezo electric
sensor can be used as a crash or rollover detector of the vehicle during and after a crash. With
signals from a piezo electric sensor, a severe accident can be recognized. According to this
project when a vehicle meets with an accident immediately piezo electric sensor will detect the
signal or if a car rolls over. Then with the help of GSM module and GPS module, the location
will be sent to the emergency contact. Then after conforming the location necessary action will
be taken. If the person meets with a small accident or if there is no serious threat to anyone’s
life, then the alert message can be terminated by the driver by a switch provided in order to
avoid wasting the valuable time of the medical rescue team.
Bituminous road construction project based learning report
Road construction is not as easy as it seems to be, it includes various steps and it starts with its designing and
structure including the traffic volume consideration. Then base layer is done by bulldozers and levelers and after
base surface coating has to be done. For giving road a smooth surface with flexibility, Asphalt concrete is used.
Asphalt requires an aggregate sub base material layer, and then a base layer to be put into first place. Asphalt road
construction is formulated to support the heavy traffic load and climatic conditions. It is 100% recyclable and
saving non renewable natural resources.
With the advancement of technology, Asphalt technology gives assurance about the good drainage system and with
skid resistance it can be used where safety is necessary such as outsidethe schools.
The largest use of Asphalt is for making asphalt concrete for road surfaces. It is widely used in airports around the
world due to the sturdiness and ability to be repaired quickly, it is widely used for runways dedicated to aircraft
landing and taking off. Asphalt is normally stored and transported at 150’C or 300’F temperature
DESIGN AND MANUFACTURE OF CEILING BOARD USING SAWDUST AND WASTE CARTON MATERI...
The need for ecofriendly materials as building materials in this century cannot be overemphasized
原版制作(Humboldt毕业证书)柏林大学毕业证学位证一模一样
原件一模一样【微信：bwp0011】《(Humboldt毕业证书)柏林大学毕业证学位证》【微信：bwp0011】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问微bwp0011
【主营项目】
一.毕业证【微bwp0011】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【微bwp0011】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Supermarket Management System Project Report.pdf
Supermarket management is a stand-alone J2EE using Eclipse Juno program.
This project contains all the necessary required information about maintaining
the supermarket billing system.
The core idea of this project to minimize the paper work and centralize the
data. Here all the communication is taken in secure manner. That is, in this
application the information will be stored in client itself. For further security the
data base is stored in the back-end oracle and so no intruders can access it.
一比一原版(爱大毕业证书)爱荷华大学毕业证如何办理
原版一模一样【微信：741003700 】【(爱大毕业证书)爱荷华大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
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Smart Pill Dispenser that boosts medication adherence, empowers patients, enables remote monitoring, enhances safety, reduces healthcare costs, and contributes to data-driven healthcare improvements
Digital Twins Computer Networking Paper Presentation.pptx
A Digital Twin in computer networking is a virtual representation of a physical network, used to simulate, analyze, and optimize network performance and reliability. It leverages real-time data to enhance network management, predict issues, and improve decision-making processes.
Generative AI Use cases applications solutions and implementation.pdf
Generative AI solutions encompass a range of capabilities from content creation to complex problem-solving across industries. Implementing generative AI involves identifying specific business needs, developing tailored AI models using techniques like GANs and VAEs, and integrating these models into existing workflows. Data quality and continuous model refinement are crucial for effective implementation. Businesses must also consider ethical implications and ensure transparency in AI decision-making. Generative AI's implementation aims to enhance efficiency, creativity, and innovation by leveraging autonomous generation and sophisticated learning algorithms to meet diverse business challenges.
https://www.leewayhertz.com/generative-ai-use-cases-and-applications/
Assistant Engineer (Chemical) Interview Questions.pdf
These are interview questions for the post of Assistant Engineer (Chemical)
Determination of Equivalent Circuit parameters and performance characteristic...
Includes the testing of induction motor to draw the circle diagram of induction motor with step wise procedure and calculation for the same. Also explains the working and application of Induction generator
一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理
原版一模一样【微信：741003700 】【(uoft毕业证书)加拿大多伦多大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
原版一模一样【微信：741003700 】【(uofo毕业证书)美国俄勒冈大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
Open Channel Flow: fluid flow with a free surface
Open Channel Flow: This topic focuses on fluid flow with a free surface, such as in rivers, canals, and drainage ditches. Key concepts include the classification of flow types (steady vs. unsteady, uniform vs. non-uniform), hydraulic radius, flow resistance, Manning's equation, critical flow conditions, and energy and momentum principles. It also covers flow measurement techniques, gradually varied flow analysis, and the design of open channels. Understanding these principles is vital for effective water resource management and engineering applications.
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NOISE REDUCTION IN GEAR TRAIN
- 1. NOISE REDUCTION IN GEAR TRAIN Presented by G RAJU (14481D1503)
- 3. Noise due to : Worn tooth
- 5. Worn tooth :
- 8. Gear rattling phenomenon and hammering noise:
- 9. GEAR TRAIN HAMMERING NOISE : Because of the camshaft torque variation and the existing of gear backlash, gear hammering happens .
- 10. Backlash phenomenon : Clearance or lost motion in a mechanism caused by gaps between the meshing teeth.
- 11. How to reduce noise :- 1.Component oriented concepts: Using scissors gears
- 12. Advantages and disadvantages : Eliminates backlash across the gear train because of relative motion between the gears. Reduces noise . Manufacturable and available in the market. × Expensive . × Heavy because of presence of springs and bolts and retaining rings . × The design increases complexity .
- 13. Torsion spring system: A torsion spring is used to connect the gears and the relative motion between the gears is absorbed by the torsion spring.
- 14. Radially arranged springs: The gears are arranged with springs positioned radially, In order to facilitate the relative motion, one of the gears is fitted on the shaft and the other.
- 15. Gears with an elastomeric material : The gears contain an elastomeric material between the gears in order to facilitate relative motion between the two gears. The elastomeric material could be rubber or any other available material.
- 16. Seeger rings : For narrower gears it might not be possible to fit springs or it could be a problem in producing the required amount of torsioning .
- 17. 2.Material Concepts: A number of different factors and properties have to be considered while choosing an appropriate and efficient material for an engine gear. These include. • Material availability • Cost • Fatigue limits • Temperature limits • Fracture toughness • Load and torque carrying capacity • Manufacturing requirements • Weight • Treatments • Machinability • Operational characteristics • Damping characteristics • Corrosion and wear resistance
- 18. The other main considerations while selecting material are : Powder Metallurgy Surface densification Thermal expansion Weight perspective
- 19. 3. Redesigned layout concepts: Eccentric/Elliptic drive mechanism: An idea came up to reduce/eliminate the number of gears and optimize the gear train. an idea came up to reduce/eliminate the number of gears and optimize the gear train. Advantages and disadvantages of the elliptic mechanism: Less number of gears minimizing parts Lower weight potential Lower noise and vibration potential Simple mechanism
- 20. × Counterweight balancing is very crucial and it could add weight to the system . × Not yet tried for heavy duty applications. Bevel gear timing system : The basic idea was to reduce the number of meshes in the gear train between the gears thereby reducing the friction and power losses. Moreover this might also reduce the gear rattle and noise generated at the different gear meshes.
- 21. Bevel gear timing system
- 22. 4 .Layout improvement solutions for gear train: Effects of gear inertia Effect of meshes Effect of auxiliaries 5. Competitor Benchmark