The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
The presentation highlights the Oil contamination , its impact on hydraulic components , illustration of NAS levels . For more information and custom solutions contact - rajanjdavid@gmail.com or whatsapp me on +919884427282
IC ENGINE TESTING
At a design and development stage an engineer would design an engine with certain aims in his mind. The aims may include the variables like indicated power, brake power,
brake specific fuel consumption, exhaust emissions, cooling of engine, maintenance free operation etc. The other task of the development engineer is to reduce the cost and
improve power output and reliability of an engine. In trying to achieve these goals he has
to try various design concepts. After the design the parts of the engine are manufactured for the dimensions and surface finish and may be with certain tolerances. In order verify the designed and developed engine one has to go for testing and performance evaluation of the engines.
Thus, in general, a development engineer will have to conduct a wide variety of engine
tests starting from simple fuel and air-flow measurements to taking of complicated
injector needle lift diagrams, swirl patterns and photographs of the burning process in
the combustion chamber. The nature and the type of the tests to be conducted depend
upon various factors, some of which are: the degree of development of the particular
design, the accuracy required, the funds available, the nature of the manufacturing
company, and its design strategy. In this chapter, only certain basic tests and
measurements will be considered.
After studying this unit, you should be able to
• understand the performance parameters in evaluation of IC engine
performance,
• calculate the speed of IC engine, fuel consumption, air consumption, etc.,
• evaluate the exhaust smoke and exhaust emission, and
• differentiate between the performance of SI engine and CI engines.
Analysis of hydrodynamic fixed pad bearing to reduce vibration by replacing f...ijsrd.com
Rotating machineries are always subject to vibrations due to critical speeds, unbalance, and instability. Usually the least expensive modification of a machine to make is the bearing. A wide variety of bearings have been developed to combat some of the different types of vibration problems. This report consist the analysis of 360deg hydrodynamic bearing of Boiler Feed water Pump. The boiler feed water pump is very critical rotatory equipment of Thermal power plant the bearing of this pump must be able to withstand in vibration and other hydraulic forces while still maintaining a high degree of reliability. This report consist analysis and design of 360 hydrodynamic bearing also replacing fixed pad by flexural pad and analysis bearing vibration and compare vibration for the same condition with the help of FEM Method in ANSYS.
The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
The presentation highlights the Oil contamination , its impact on hydraulic components , illustration of NAS levels . For more information and custom solutions contact - rajanjdavid@gmail.com or whatsapp me on +919884427282
IC ENGINE TESTING
At a design and development stage an engineer would design an engine with certain aims in his mind. The aims may include the variables like indicated power, brake power,
brake specific fuel consumption, exhaust emissions, cooling of engine, maintenance free operation etc. The other task of the development engineer is to reduce the cost and
improve power output and reliability of an engine. In trying to achieve these goals he has
to try various design concepts. After the design the parts of the engine are manufactured for the dimensions and surface finish and may be with certain tolerances. In order verify the designed and developed engine one has to go for testing and performance evaluation of the engines.
Thus, in general, a development engineer will have to conduct a wide variety of engine
tests starting from simple fuel and air-flow measurements to taking of complicated
injector needle lift diagrams, swirl patterns and photographs of the burning process in
the combustion chamber. The nature and the type of the tests to be conducted depend
upon various factors, some of which are: the degree of development of the particular
design, the accuracy required, the funds available, the nature of the manufacturing
company, and its design strategy. In this chapter, only certain basic tests and
measurements will be considered.
After studying this unit, you should be able to
• understand the performance parameters in evaluation of IC engine
performance,
• calculate the speed of IC engine, fuel consumption, air consumption, etc.,
• evaluate the exhaust smoke and exhaust emission, and
• differentiate between the performance of SI engine and CI engines.
Analysis of hydrodynamic fixed pad bearing to reduce vibration by replacing f...ijsrd.com
Rotating machineries are always subject to vibrations due to critical speeds, unbalance, and instability. Usually the least expensive modification of a machine to make is the bearing. A wide variety of bearings have been developed to combat some of the different types of vibration problems. This report consist the analysis of 360deg hydrodynamic bearing of Boiler Feed water Pump. The boiler feed water pump is very critical rotatory equipment of Thermal power plant the bearing of this pump must be able to withstand in vibration and other hydraulic forces while still maintaining a high degree of reliability. This report consist analysis and design of 360 hydrodynamic bearing also replacing fixed pad by flexural pad and analysis bearing vibration and compare vibration for the same condition with the help of FEM Method in ANSYS.
PERFORMANCE ANALYSIS OF GAS LUBRICATED CYLINDRICAL JOURNAL BEARING USING FS...Venkata Sai Teja Gunuputi
To choose the best suitable lubricant for different eccentricity ratio and L/D ratio combinations of journal bearings by considering the pressure, deformation and stress results obtained in analysis.
FDM Numerical solution of Laplace Equation using MATLABAya Zaki
Finite Difference Method Numerical solution of Laplace Equation using MATLAB. 2 computational methods are used.
U can vary the number of grid points and the boundary conditions
Vinu Krishnaswamy, Associate Architect for One North Interactive, gives his take on the best ways to utilize social media in today's realm of digital marketing.
From the 2014 Experience Lab: Reimagine Marketing. To watch a video of this presentation, visit http://bit.ly/1th7nz2.
COMPARATIVE STUDY OF FULL JOURNAL BEARING WITH BIO LUBRICANTS – JATROPHA OIL,...IAEME Publication
The present study was carried with an aim of checking the feasibility of usage of bio-lubricants as a lubricant in hydrodynamic full journal bearing. Three bio-lubricants Castor oil, Neem oil, Jatropha oil and mineral oil SAE 20W50 is used alternatively to check the output of the journal bearing
operating parameters.
One dim, steady-state, heat conduction_with_heat_generationtmuliya
This file contains slides on One-dimensional, steady-state heat conduction with heat generation.
The slides were prepared while teaching Heat Transfer course to the M.Tech. students in Mechanical Engineering Dept. of St. Joseph Engineering College, Vamanjoor, Mangalore, India, during Sept. – Dec. 2010.
It is hoped that these Slides will be useful to teachers, students, researchers and professionals working in this field.
This file contains slides on One-dimensional, steady state heat conduction without heat generation. The slides were prepared while teaching Heat Transfer course to the M.Tech. students.
Topics covered: Plane slab - composite slabs – contact resistance – cylindrical Systems – composite cylinders - spherical systems – composite spheres - critical thickness of insulation – optimum thickness – systems with variable thermal conductivity
NUMERICAL METHODS IN STEADY STATE, 1D and 2D HEAT CONDUCTION- Part-IItmuliya
This file contains slides on NUMERICAL METHODS IN STEADY STATE 1D and 2D HEAT CONDUCTION – Part-II.
The slides were prepared while teaching Heat Transfer course to the M.Tech. students in Mechanical Engineering Dept. of St. Joseph Engineering College, Vamanjoor, Mangalore, India, during Sept. – Dec. 2010.
Contents: Methods of solving a system of simultaneous, algebraic equations - 1D steady state conduction in cylindrical and spherical systems - 2D steady state conduction in cartesian coordinates - Problems
Numerical methods in Transient-heat-conductiontmuliya
This file contains slides on Numerical methods in Transient heat conduction.
The slides were prepared while teaching Heat Transfer course to the M.Tech. students in Mechanical Engineering Dept. of St. Joseph Engineering College, Vamanjoor, Mangalore, India, during Sept. – Dec. 2010.
Contents: Finite difference eqns. by energy balance – Explicit and Implicit methods – 1-D transient conduction in a plane wall – stability criterion – Problems - 2-D transient heat conduction – Finite diff. eqns. for interior nodes – Explicit and Implicit methods - stability criterion – difference eqns for different boundary conditions – Accuracy considerations – discretization error and round–off error - Problems
This file contains slides on Transient Heat conduction: Part-I
The slides were prepared while teaching Heat Transfer course to the M.Tech. students in Mechanical Engineering Dept. of St. Joseph Engineering College, Vamanjoor, Mangalore, India, during Sept. – Dec. 2010. Contents: Lumped system analysis – criteria for lumped system analysis – Biot and Fourier Numbers – Response time of a thermocouple - One-dimensional transient conduction in large plane walls, long cylinders and spheres when Bi > 0.1 – one-term approximation - Heisler and Grober charts- Problems
Generation of Air Swirl through Inlet Poppet Valve Modification and To Enhanc...iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
General overview of HVAC Technology
General overview of VRF Technology
Benefits of VRF
General overview of Refrigerant
General overview of Ton
General overview of Compressor
2003 TOYOTA CELICA Service Repair Manualjsemd suekd
This is the Highly Detailed factory service repair manual for the2003 TOYOTA CELICA, this Service Manual has detailed illustrations as well as step by step instructions,It is 100 percents complete and intact. they are specifically written for the do-it-yourself-er as well as the experienced mechanic.2003 TOYOTA CELICA Service Repair Workshop Manual provides step-by-step instructions based on the complete dis-assembly of the machine. It is this level of detail, along with hundreds of photos and illustrations, that guide the reader through each service and repair procedure. Complete download comes in pdf format which can work under all PC based windows operating system and Mac also, All pages are printable. Using this repair manual is an inexpensive way to keep your vehicle working properly.
Service Repair Manual Covers:
Introduction
Maintenance
Preparation
Service Specifications
Diagnositics
Engine Mechanical
Emission Control
SFI
Cooling
Lubrication
Ignition
Starting
Charging
Clutch
C56 Manual Transaxle
C60 Manual Transaxle
U240E Automatic Transaxle
U341E Automatic Transaxle
Suspension and Axle
Brake
Steering
Supplemental Restraint System
Body Electrical
Body
Air Conditioning
Alphabetical Index
File Format: PDF
Compatible: All Versions of Windows & Mac
Language: English
Requirements: Adobe PDF Reader
NO waiting, Buy from responsible seller and get INSTANT DOWNLOAD, Without wasting your hard-owned money on uncertainty or surprise! All pages are is great to have2003 TOYOTA CELICA Service Repair Workshop Manual.
Looking for some other Service Repair Manual,please check:
https://www.aservicemanualpdf.com/
Thanks for visiting!
2002 TOYOTA CELICA Service Repair Manualjksmttemmd
This is the Highly Detailed factory service repair manual for the2002 TOYOTA CELICA, this Service Manual has detailed illustrations as well as step by step instructions,It is 100 percents complete and intact. they are specifically written for the do-it-yourself-er as well as the experienced mechanic.2002 TOYOTA CELICA Service Repair Workshop Manual provides step-by-step instructions based on the complete dis-assembly of the machine. It is this level of detail, along with hundreds of photos and illustrations, that guide the reader through each service and repair procedure. Complete download comes in pdf format which can work under all PC based windows operating system and Mac also, All pages are printable. Using this repair manual is an inexpensive way to keep your vehicle working properly.
Service Repair Manual Covers:
Introduction
Maintenance
Preparation
Service Specifications
Diagnositics
Engine Mechanical
Emission Control
SFI
Cooling
Lubrication
Ignition
Starting
Charging
Clutch
C56 Manual Transaxle
C60 Manual Transaxle
U240E Automatic Transaxle
U341E Automatic Transaxle
Suspension and Axle
Brake
Steering
Supplemental Restraint System
Body Electrical
Body
Air Conditioning
Alphabetical Index
File Format: PDF
Compatible: All Versions of Windows & Mac
Language: English
Requirements: Adobe PDF Reader
NO waiting, Buy from responsible seller and get INSTANT DOWNLOAD, Without wasting your hard-owned money on uncertainty or surprise! All pages are is great to have2002 TOYOTA CELICA Service Repair Workshop Manual.
Looking for some other Service Repair Manual,please check:
https://www.aservicemanualpdf.com/
Thanks for visiting!
8
Similar to A Project on Pressure and temperature analysis of tilted pad thrust bearing using Teflon pads (20)
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
A Project on Pressure and temperature analysis of tilted pad thrust bearing using Teflon pads
1. “PRESSURE AND TEMPERATURE ANALYSIS OF
TILTED PAD THRUST BEARING WITH THE USE OF
TEFLON AS PAD MATERIAL”
Presented by Group No.07
DUDHANE SWAPNIL BHAIRAVNATH (2011BME015)
KABADAGI RAHUL SHIVKUMAR (2011BME024)
MANGURE AZHAR AYUB (2011BME035)
PATEL JUNED YUNUS (2011BME039)
CHAVAN KARANSINH JITENDRA (2012BME202)
Presentation
On
2. INTRODUCTION:
The term Sliding bearing refers to a type of bearing where two conformal surfaces
usually the stationary bearing and a moving shaft slide relative to one another with load
distributed directly across the interface. A suitable lubricant may be employed to reduce
the friction between these two surfaces. In fluid film bearings, this lubricant builds up a
layer of sufficient thickness such that the two surfaces are completely separated.
Tilted Pad Thrust Bearing are designed to transfer high axial load from rotating shaft
with minimum power loss. Bearing consist of circumferential pads & each pad is free to
tilt to create self lubricating hydrodynamic film .
The number of parameters which affect the bearing are categorized as operating
parameter and performance parameters.
Speed of rotation, applied load, surface curvature & type of lubrication are the operating
parameter while max. pressure generated ,temperature of bearing , oil viscosity
,minimum film thickness, surface wear are performance parameters.
3. CONSTRUCTION :
Tilting pad thrust bearing is an assembly of number of tilted pads, Runner, lubricating
oil, cooling coils and casing.
Bearing pads are individual plates which are free to tilt about their individual pivots.
usually three or more pads are used .
Pads are made up of two layers of materials .Face layer of pad is Babbit or PTFE
(Polytetrafluoroethylene) with 2- 3 mm thickness. This layer is supported by MS pad
called as backing.
Lubricating oil is provided in housing as a bath or fed either to centre of housing near
shaft or to the leading edge of pad with external aid.
Depending upon the method of lubrication, it is also differentiated as Flooded
lubrication or Directed lubrication.
Runner of bearing is attached to rotating shaft whose thrust need to support by bearing.
5. WORKING:
In Titling pad thrust bearing, Runner and pads are separated by an oil film during
operation.
When the runner is stationary ,the pads are in direct contact with pad .As shaft with
runner rotates form an oil film between the pad and runner.
Each Pad will tilt to the some angle which forms converging wedge. The flow
constriction due to wedge acts as a bottleneck, which causes slowing down the flow
rate across the pad from the inlet edge towards the trailing edge.
The gradual reduction of oil volume in the gap leads to rise in pressure of the oil film
which lifts the shaft.
6. OBJECTIVES:
To acquire detailed understanding of the current system.
To modify old cooling system.
To replace lubricating Oil in the test Rig
To replace defective Direction Control Valve
To develop pressure sensor for pressure measurement
To develop temperature sensor for temperature measurement
To demonstrate the test rig for sake of pressure and temperature readings with
different load conditions
To measure frictional power losses
To analyze the obtained readings
To conclude on the basis of observations and readings taken.
9. DESCRIPTION OF TEST RIG:
It mainly consists of four distinct parts:
1) Driving motor along with driving pulley :
A.C induction motor.
Capacity 7.5 HP
Rated speed 1430 rpm
2) Oil Sump and Runner along with Driven Pulley:
Oil sump is a casting body . Inside this a pocket is fitted. Pocket has eight
equally placed radial slots and dowel pins. There are eight pads which tilt about an axis
passing through its geometric center along a radial slot.
Tilting of each pad about the pivot causes formation of wedge shaped oil
film along the sliding direction of runner. This wedge shape oil film in turn causes self
acting pumping action of oil. The combination of squeeze, stretch and wedge effect
generates pressure within oil film. Due to this pressure, load of runner is sustained.
10. 3) Hydraulic power pack and loading system:
Loading system consists of lever, loading piece, brackets, with their base plate.
Hydraulic cylinder which is mounted on loading frame provides the load as per
requirement through loading lever beam. Loading frame consists of two vertical I
columns with four I beams welded together. Loading member is supported in brackets at
one end and loaded by hydraulic cylinder at other end.
4) Cooling System :
Copper tubing of 1 inch diameter is provided. One end of this copper tubing is
connected to a reservoir of water and other end is drained.
The cooling effect is provided by circulating water around the oil sump. For better
and effective cooling, the rate of water flow is increased by placing reservoir tank at a
height of 10 feet from setup foundation.
11. DEVELOPMENTS IN CURRENT PROJECT SET-UP:
The following developments are done :
DC valve replacement.
Forced cooling.
Oil replacement.
Modified calibration fixture.
13. JUSTIFICATION FOR SELECTION OF PTFE AS PAD MATERIAL:
Available Grades :
Virgin PTFE
15% Peek PTFE
15 To 25% Glass Filled PTFE
25 To 35% Carbon Filled PTFE
15% Graphite Filled PTFE
40 to 60% Bronzed Filled PTFE
5 to 15% Aluminum Oxide Filled PTFE
5 to 10% Stainless Steel Filled PTFE
5 to 10% Mica Filled PTFE
55% + 5% Bronzed + Molybdenum Disulphide Filled PTFE
15% + 5% Glass + MOS2 Filled PTFE
Pigmented PTFE
14. INHERENT TEFLON PROPERTIES:
PTFE against steel has one of the lowest coefficients of friction
The load bearing capacity of the PTFE sheet is in the range of 130-140Kg/sq.cm
The PV values are found to be in excess of 10,000
Pressure (P) is the load placed on a bearing assembly. Velocity (V) is the
surface speed at which an object, such as a shaft, moves. P-V is defined as the
combination effect of the pressure of the object and the velocity at which it
moves on the bearing surface.
Service temperatures of -250 to +250°C are possible.
15. CALIBRATION OF DIAPHARGMS:
The material of diaphragm is Brass. Strain gauges are stacked on diaphragm
and such a diaphragms are mounted in a fixture for pressure measurement.
Diaphragm specification – 2 mm thick and 16 mm dia.
Procedure Of Calibration :
1) The strain gauges to be used for calibration is fitted in a fixture and mounted
on dead weight calibration apparatus.
2) The strain gauge connecting wires are attached to strain guage indicator.
3) The pressure variation is done by varying the dead weights.
4) For different loads the indicator gives different reading and these
readings are noted down.
16.
17.
18.
19. INSTRUMENTATION FOR EFFECTIVE
TEMPERATURE MEASUREMENT
For effective temperature measurement, locations for mounting of temperature
sensors are very necessary.
It is found that following methods are used for temperature measurement
1) Temperature Grid.
2) T 50/75 or 75/75
3) Oil Film Tapping.
From the above methods mentioned, temperature grid method is used.
Advantages –
It gives variation of temperature over pad surface
It gives temperature grid on pad surface.
It is best for laboratory testing.
22. INSTRUMENTATION FOR EFFECTIVE PRESSURE
MEASUREMENT
Pressure on pad varies along length and width of pad.
We are interested to know maximum pressure carried by pad.
According to previous studies following locations were chosen for pressure
sensor mounting
Sr.
No.
Pressure
points
Angular
position
from leading
edge of pad
(degree)
Radial Position
from
Centre of bearing
Pad(mm)
1 Pp1 14.07 133.10
2 Pp2 38.20 120.5
3 Pp3 34.30 105.76
• Point 1 is near leading edge and at upper
side of pad
• Point 2 is near 75/75 location. Maximum
pressure varies nearby this point.
• Point 3 is near trailing edge and at lower
side of pad.
28. POWER LOSS:
PARTICULARS LOAD(KG)
175 1055 1936 2641
WATER INITIAL
TEMPERATURE
(0C)
29.1 29.57 30 30.1
WATER FINAL
TEMPERATURE
(0C)
34.1 36.8 39.8 42.4
TEMPERATURE
GAINED BY
WATER(0C)
5 7.23 9.8 12.3
OIL INITIAL
TEMPERATURE
(0C)
32.4 33.2 30.7 30.9
OIL FINAL
TEMPERATURE
(0C)
38.5 41.6 41.7 44
TEMPERATURE
GAINED BY
OIL(0C)
6.1 8.4 11 13.1
MASS FLOW
RATE OF WATER
MW (KG/SEC)
3.25 X 10-
2
3.25 X 10-
2
3.25 X 10-
2
3.25 X 10-
2
HEAT GAINED BY
WATER(KWATTS)
0.68 0.98 1.33 1.67
29. CONCLUSION:
By referring to graph no.1, it can be concluded that pressure
carried by pad increases as load on pad increases
By referring to graph no.2, it can be concluded that temperature
of pad increases as load on pad increases.
Maximum temperature of pad is observed at 75/75 location.
By referring to graph no.3, it can be concluded that frictional loss
increases as load on pad increases
Maximum pressure on pad is observed near 75/75 location.
Maximum pressure on pad is observed near to maximum
temperature location.
30. EXISTING TRENDS:
LEG trademark coined by KINGSBURY
LEG slim-line low profile bearings
Thinner profiles
Each pad equally loaded
Leveling plates on back of pad
Leveling plates located in carrier ring ensures equal loading.
31. FUTURE SCOPE:
Effects of different surface coatings on wear resistance of sector
shaped pads and bearing performance can be studied.
Use of various pivot position rather than central pivot and its
effect on performance.
Implementation of various pad materials and assuring their
sustainability.
Use of different lubricating oil. E.g. Bio-lubricants.
Use of different pad profiles can be implemented