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Chapter 16 Clutches, Brakes, Couplings, and Flywheels Lecture Slides The McGraw-Hill Companies © 2012

Lecture Slidesweb.itu.edu.tr/~halit/Makel/Ch_16_slides_m.pdf · Shigley’s Mechanical Engineering Design Fig. 16–6 . Force Analysis Fig. 16–7 Shigley’s Mechanical Engineering

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Page 1: Lecture Slidesweb.itu.edu.tr/~halit/Makel/Ch_16_slides_m.pdf · Shigley’s Mechanical Engineering Design Fig. 16–6 . Force Analysis Fig. 16–7 Shigley’s Mechanical Engineering

Chapter 16

Clutches, Brakes,

Couplings, and Flywheels

Lecture Slides

The McGraw-Hill Companies © 2012

Page 2: Lecture Slidesweb.itu.edu.tr/~halit/Makel/Ch_16_slides_m.pdf · Shigley’s Mechanical Engineering Design Fig. 16–6 . Force Analysis Fig. 16–7 Shigley’s Mechanical Engineering

Chapter Outline

Shigley’s Mechanical Engineering Design

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Model of Clutch

Shigley’s Mechanical Engineering Design

Fig. 16–1

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Friction Analysis of a Doorstop

Shigley’s Mechanical Engineering Design Fig. 16–2

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Friction Analysis of a Doorstop

Shigley’s Mechanical Engineering Design

Fig. 16–2

Page 6: Lecture Slidesweb.itu.edu.tr/~halit/Makel/Ch_16_slides_m.pdf · Shigley’s Mechanical Engineering Design Fig. 16–6 . Force Analysis Fig. 16–7 Shigley’s Mechanical Engineering

Friction Analysis of a Doorstop

Shigley’s Mechanical Engineering Design

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Friction Analysis of a Doorstop

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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Example 16–1

Shigley’s Mechanical Engineering Design

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An Internal Expanding Centrifugal-acting Rim Clutch

Shigley’s Mechanical Engineering Design Fig. 16–3

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Internal Friction Shoe Geometry

Shigley’s Mechanical Engineering Design

Fig. 16–4

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Internal Friction Shoe Geometry

Shigley’s Mechanical Engineering Design Fig. 16–5

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Pressure Distribution Characteristics

Pressure distribution is sinusoidal

For short shoe, as in (a), the

largest pressure on the shoe is pa

at the end of the shoe

For long shoe, as in (b), the

largest pressure is pa at qa = 90º

Shigley’s Mechanical Engineering Design

Fig. 16–6

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Force Analysis

Shigley’s Mechanical Engineering Design Fig. 16–7

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Force Analysis

Shigley’s Mechanical Engineering Design

Self-locking condition

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Force Analysis

Shigley’s Mechanical Engineering Design

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Force Analysis

Shigley’s Mechanical Engineering Design

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Example 16–2

Shigley’s Mechanical Engineering Design

Fig. 16–8

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Example 16–2

Shigley’s Mechanical Engineering Design

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Example 16–2

Shigley’s Mechanical Engineering Design

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Example 16–2

Shigley’s Mechanical Engineering Design

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Example 16–2

Shigley’s Mechanical Engineering Design

Page 30: Lecture Slidesweb.itu.edu.tr/~halit/Makel/Ch_16_slides_m.pdf · Shigley’s Mechanical Engineering Design Fig. 16–6 . Force Analysis Fig. 16–7 Shigley’s Mechanical Engineering

Example 16–2

Shigley’s Mechanical Engineering Design

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Example 16–2

Shigley’s Mechanical Engineering Design

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Example 16–2

Shigley’s Mechanical Engineering Design Fig. 16–9

Page 33: Lecture Slidesweb.itu.edu.tr/~halit/Makel/Ch_16_slides_m.pdf · Shigley’s Mechanical Engineering Design Fig. 16–6 . Force Analysis Fig. 16–7 Shigley’s Mechanical Engineering

An External Contracting Clutch-Brake

Shigley’s Mechanical Engineering Design Fig. 16–10

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Notation of External Contracting Shoes

Shigley’s Mechanical Engineering Design Fig. 16–11

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Force Analysis for External Contracting Shoes

Shigley’s Mechanical Engineering Design

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Force Analysis for External Contracting Shoes

Shigley’s Mechanical Engineering Design

For counterclockwise rotation:

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Brake with Symmetrical Pivoted Shoe

Shigley’s Mechanical Engineering Design Fig. 16–12

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Wear and Pressure with Symmetrical Pivoted Shoe

Shigley’s Mechanical Engineering Design

Fig. 16–12b

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Force Analysis with Symmetrical Pivoted Shoe

Shigley’s Mechanical Engineering Design

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Force Analysis with Symmetrical Pivoted Shoe

Shigley’s Mechanical Engineering Design

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Notation for Band-Type Clutches and Brakes

Shigley’s Mechanical Engineering Design Fig. 16–13

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Force Analysis for Brake Band

Shigley’s Mechanical Engineering Design

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Force Analysis for Brake Band

Shigley’s Mechanical Engineering Design

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Frictional-Contact Axial Single-Plate Clutch

Shigley’s Mechanical Engineering Design Fig. 16–14

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Frictional-Contact Axial Multi-Plate Clutch

Shigley’s Mechanical Engineering Design Fig. 16–15

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Geometry of Disk Friction Member

Shigley’s Mechanical Engineering Design Fig. 16–16

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Uniform Wear

Shigley’s Mechanical Engineering Design

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Uniform Pressure

Shigley’s Mechanical Engineering Design

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Comparison of Uniform Wear with Uniform Pressure

Shigley’s Mechanical Engineering Design Fig. 16–17

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Automotive Disk Brake

Shigley’s Mechanical Engineering Design

Fig. 16–18

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Geometry of Contact Area of Annular-Pad Brake

Shigley’s Mechanical Engineering Design Fig. 16–19

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Analysis of Annular-Pad Brake

Shigley’s Mechanical Engineering Design

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Uniform Wear

Shigley’s Mechanical Engineering Design

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Uniform Pressure

Shigley’s Mechanical Engineering Design

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Example 16–3

Shigley’s Mechanical Engineering Design

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Example 16–3

Shigley’s Mechanical Engineering Design

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Example 16–3

Shigley’s Mechanical Engineering Design

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Geometry of Circular Pad Caliper Brake

Shigley’s Mechanical Engineering Design Fig. 16–20

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Analysis of Circular Pad Caliper Brake

Shigley’s Mechanical Engineering Design

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Example 16–4

Shigley’s Mechanical Engineering Design

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Example 16–4

Shigley’s Mechanical Engineering Design

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Cone Clutch

Shigley’s Mechanical Engineering Design Fig. 16–21

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Contact Area of Cone Clutch

Shigley’s Mechanical Engineering Design Fig. 16–22

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Uniform Wear

Shigley’s Mechanical Engineering Design

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Uniform Pressure

Shigley’s Mechanical Engineering Design

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Energy Considerations

Shigley’s Mechanical Engineering Design

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Energy Considerations

Shigley’s Mechanical Engineering Design

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Temperature Rise

Shigley’s Mechanical Engineering Design

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Newton’s Cooling Model

Shigley’s Mechanical Engineering Design

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Effect of Braking on Temperature

Shigley’s Mechanical Engineering Design Fig. 16–23

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Rate of Heat Transfer

Shigley’s Mechanical Engineering Design

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Heat-Transfer Coefficient in Still Air

Shigley’s Mechanical Engineering Design Fig. 16–24a

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Ventilation Factors

Shigley’s Mechanical Engineering Design Fig. 16–24b

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Energy Analysis

Shigley’s Mechanical Engineering Design

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Example 16–5

Shigley’s Mechanical Engineering Design

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Example 16–5

Shigley’s Mechanical Engineering Design

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Example 16–5

Shigley’s Mechanical Engineering Design

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Area of Friction Material for Average Braking Power

Shigley’s Mechanical Engineering Design

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Characteristics of Friction Materials

Shigley’s Mechanical Engineering Design

Table 16–3

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Some Properties of Brake Linings

Shigley’s Mechanical Engineering Design Table 16–4

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Friction Materials for Clutches

Shigley’s Mechanical Engineering Design

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Positive-Contact Clutches

Characteristics of positive-

contact clutches

◦ No slip

◦ No heat generated

◦ Cannot be engaged at high

speeds

◦ Sometimes cannot be

engaged when both shafts are

at rest

◦ Engagement is accompanied

by shock

Shigley’s Mechanical Engineering Design

Square-jaw Clutch

Fig. 16–25a

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Overload Release Clutch

Shigley’s Mechanical Engineering Design

Fig. 16–25b

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Shaft Couplings

Shigley’s Mechanical Engineering Design

Fig. 16–26

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Flywheels

Shigley’s Mechanical Engineering Design

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Hypothetical Flywheel Case

Shigley’s Mechanical Engineering Design

Fig. 16–27

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Kinetic Energy

Shigley’s Mechanical Engineering Design

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Engine Torque for One Cylinder Cycle

Shigley’s Mechanical Engineering Design Fig. 16–28

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Coefficient of Speed Fluctuation, Cs

Shigley’s Mechanical Engineering Design

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Energy Change

Shigley’s Mechanical Engineering Design

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Example 16–6

Shigley’s Mechanical Engineering Design

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Example 16–6

Shigley’s Mechanical Engineering Design

Table 16–6

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Example 16–6

Shigley’s Mechanical Engineering Design

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Punch-Press Torque Demand

Shigley’s Mechanical Engineering Design

Fig. 16–29

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Punch-Press Analysis

Shigley’s Mechanical Engineering Design

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Induction Motor Characteristics

Shigley’s Mechanical Engineering Design

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Induction Motor Characteristics

Shigley’s Mechanical Engineering Design

Deceleration:

Acceleration:

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Induction Motor Characteristics

Shigley’s Mechanical Engineering Design