Simple machines and gears (1)

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Haileybury

An slideshare presentation of simple machines, gears, mechanical advantage, velocity ratios and pulley systems.

Business Technology

Simple Machines: Gears, Velocity Ratios and Mechanical Advantage

What is a simple machine? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What are gears and why are they so useful? ,[object Object],[object Object],[object Object]

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Drawbacks of Pulleys ,[object Object],[object Object]

How do I calculate my gear ratio? ,[object Object],[object Object],[object Object]

What is Velocity Ratio (VR)? ,[object Object],[object Object]

What is Mechanical Advantage (MA)? ,[object Object],[object Object],[object Object]

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The Transmission Contents Abstract 3 Introduction 3 Discussion 3 (Automatic-transmission) 3 (Manual Transmission) 5 (Type of Gears) 6 (Gear Ratios) 7 (Transmission and Shaft work) 8 Relative-Motion (Analysis: Velocity) 9 Conclusion 10 References 11 Abstract The aim of this report is to introduce the types of transmissions and how they operate. A description of the internal parts and external parts are included to guide the reader better understand the system. Since the report is based on a thermodynamic perspective, some basic equations will also be presented. The relationship between thermodynamics and transmission system is mainly in the shaft work.Introduction To overcome inertia, the automobile engine develops power that is transmitted as torque from the engine crankshaft to the wheels. In order to achieve a smooth and gradual transfer of power, we use a clutch friction unit to engage and disengage the power flow. The use of clutches are actually found in both transmissions, however, the location is different. The transmission is used to best choose the gear ratio according to the power and speed. It is also present to provide the proper gear ratio for the car in different conditions, such as when the car is accelerating, stopping, maintaining speed, or reversing. The basic components necessary to deliver power to the drive wheels are the clutches, control linkages, flywheel (only in manual) or flexplate (only in automatic), torque converter (automatic), and the transmission. The relationship between thermodynamics and transmission system is mainly in the shaft work.Discussion (Automatic-transmission) To begin, it is important to understand that all transmissions are different. There is the automatic, semi-automatic, and manual (standard) transmission. The one that will first be introduced is the more common type— the automatic transmission. The automatic transmission is called “automatic” because the gear ratios are changed automatically without the driver’s required input, typically using hydraulics o select ears depending on the pressure exerted by the fluid within the transmission assembly.. It is said that the clutch is replaced by a mechanism called the torque converter. This torque converter is located in front of the transmission housing as shown. The torque converter is a mechanical device that transfers power from engine to the transmission. (Note that the torque converter is only found in automatic transmissions). Inside the torque converter there is an impeller (pump), stator, and a turbine as shown. The impeller is connected directly to the engine. The impeller is responsible for moving the turbine. The movement of the impeller accompanied with the transmission fluid forces the turbine to rotate. This rotation causes the kinetic energy to be transferred to the input shaft, and later to the inside of the transmission. Lastly, there is small mechanism that is called the stator. This com ...

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