materials used in friction clutch design
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materials used in friction clutch design
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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 bWhat are the advantages and disadvantages of conical clutches compared with plate friction clutches?
- Establish a formula for the frictional torque transmitted by a cone clutch(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.What is the primary advantage of an eddy current clutch over a mechanical clutch?
- Write down the parameters considered in determining the basic dimensions of the friction clutchThese 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 guardDerivation of the relationship between tensile strength, contact angle and friction coefficient of a V-type belt