QUESTIONS 1. What is a clutch? Discuss the various types of clutches giving at least one practical application for each. 2. Why a positive clutch is used? Describe, with the help of a neat sketch, the working of a jaw or claw clutch. 3. Name the different types of clutches. Describe with the help of neat sketches the working principles of two different types of friction clutches. 4. What are the materials used for lining of friction surfaces? 5. Why it is necessary to dissipate the heat generated when clutches operate? 6. Establish a formula for the frictional torque transmitted by a cone clutch. 7. Describe, with the help of a neat sketch, a centrifugal clutch and deduce an expression for the total frictional torque transmitted. How the shoes and springs are designed for such a clutch?

QUESTIONS 1. What is a clutch? Discuss the various types of clutches giving at least one practical application for each. 2. Why a positive clutch is used? Describe, with the help of a neat sketch, the working of a jaw or claw clutch. 3. Name the different types of clutches. Describe with the help of neat sketches the working principles of two different types of friction clutches. 4. What are the materials used for lining of friction surfaces? 5. Why it is necessary to dissipate the heat generated when clutches operate? 6. Establish a formula for the frictional torque transmitted by a cone clutch. 7. Describe, with the help of a neat sketch, a centrifugal clutch and deduce an expression for the total frictional torque transmitted. How the shoes and springs are designed for such a clutch?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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(a) State the main advantages of toothed clutches. (b) Uniform wear theory is used in designing a new friction clutch. Explain your ideas and concepts to support the statement. (c) (d) A brand new Street Performace Clutch are capable to delivered 135 Nm torque when the engine's flywheel is rotating at 1400 RPM. The other technical specifications are describe in Table (c). Over the years, the clutch torque performance had reduced to 100 Nm due to wear and tear of the ceramic plate while the others specification was remained unchanged. (i) Assuming the steel plate were made to wear resistance. Examine how much has the ceramic plate worn off on each contact surface individually. (ii) Calculate the transmission power lost in kW. Table (c) Descriptions Clutch plate inner diameter Clutch plate outer diameter Number of ceramic plates Number of metal plates installed Coefficient of friction, µ Coil spring stiffness Number of coil spring installed Specifications 100 mm 200 mm 3 0.3 12,000 N/m 4…
4. A multiple disc clutch running in oil is required for a touring motorcycle. The power demand is 75 kW at 9000 rpm. Space limitations restrict the maximum outer diameter of the clutch plates to 200 mm. Select an appropriate lining material and determine the radii for the discs, the number of discs required and the clamping force. 5. A multiple disc clutch is required for a high-performance motorcycle. The power demand is 100 kW at 12 000 rpm. Select an appropriate lining material and determine the radii for the discs, the number of discs required and the clamping force. 6. A multiple disc clutch is required for a small motorcycle. The power demand is 9 kW at 8500 rpm. Select an appropriate lining material and determine the radii for the discs, the number of discs required and the clamping force. 0. oolinor b
These are Considerations in Designing a Friction Clutch. Can you explain these conditions?The following considerations must be kept in mind while designing a friction clutch.1. The suitable material forming the contact surfaces should be selected.2. The moving parts of the clutch should have low weight in order to minimise the inertia load,especially in high speed service.3. The clutch should not require any external force to maintain contact of the friction surfaces.4. The provision for taking up wear of the contact surfaces must be provided.5. The clutch should have provision for facilitating repairs.6. The clutch should have provision for carrying away the heat generated at the contactsurfaces.7. The projecting parts of the clutch should be covered by guard
Hello, I hope you can help me. I'm trying to create a device that has a spinning axle and I need to change the rotational force to be perpendicular to the axle. I know there are gears that can fit together have teeth, like the attached picture. I know there are other types of mechanisms, and some are more creative. But I also need for the solution to be low friction. What are 2 low friction methods of changing the directional rotation of a power axle 90 degrees? The entire creation is small, probably 12" x 12" Thanks for your help.
(c) List the key components in a clutch assembly and explain their role in making the clutch assembly function to transmit power from the engine to the input shaft of a gearbox.
A clutch has an outside diameter of 8 in and inside diameter of 4 in. An axial force of 500 lbis used to hold the two parts together. If friction is 0.4, how much torque can the clutch handle?
Q.1 Explain why torsional coil springs are fitted inside a clutch friction disc. Q.2 Study examples of competition sintered or 'paddle' type clutches. Most of them do not have torsional springs fitted to the friction disc/plate. Suggest why springs are not fitted to these types of clutches.
(b) A multiple plate clutch has more number of clutch plates. A typical clutch consist of the following important components which are drive (friction) plates and driven (steel) plates. If a multiple plate clutch with an effective diameter of 250 mm and 150 mm are able to transmit 60 kW at 1200 rpm. Also the end thrust is given as 4.5 kN and coefficient of friction is 0.13. Answer below questions; (i) Determine torque to be carry by friction clutch. (ii) Calculate number of plates required with uniform wear and uniform pressure theory. Compare your results.
These are material used for lining of friction surfaces of a clutch should have the followingcharacteristics: 1.It should have a high and uniform coefficient of friction.2. It should not be affected by moisture and oil.3. It should have the ability to withstand high temperatures caused by slippage.4. It should have high heat conductivity.5. It should have high resistance to wear and scoring. Can you explain why these characterictic are important?
Solve the problem, show your complete solution. Answer must be in 3 decimal places. 1. A multiple-disk clutch transmits 25 kW at 600 rpm. It has 17 disks, 8 disks mounted on one shaft and 9 on the other shaft. The disks are 150 mm outside diameter and 70 mm inside diameters, respectively. If the coefficient of friction is 0.25, find the axial force required to engage the clutch and transmit the torque.
A vehicle clutch is design to temporarily disconnect drive from an engine to the transmission. There are different types of clutches to suit various applications. Often a forgotten part of an engine when tuning an engine for competition or fast road use. The performance relies on two critical elements: Co-efficient of friction and the clamping force of the spring. Task 1- Anatomy of a friction clutch Study the sectioned diaphragm sprung single plate clutch as fitted to most cars and commercial vehicles. Label the sectioned view. Briefly explain how a diaphragm clutch works. Release fork Release bearing Diaphragm- spring Clutch disc Pressure plate Q.1 Explain why torsional coil springs are fitted inside a clutch friction disc. Q.2 Study examples of competition sintered or 'paddle' type clutches. Most of them do not have torsional springs fitted to the friction disc/plate. Suggest why springs are not fitted to these types of clutches.
materials used in friction clutch design