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A trenched conical pivot bearing has semi-cone angle α and the two radii are r1 and r2 respectively with r1 > r2. The coefficient of friction between the sliding surfaces is μ. For an axial thrust load of W kN, the reduction in torque due to friction (assuming uniform rate of wear) is

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  1. μW(r1 + r2) cosec α

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Detailed Solution

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Explanation:

Particular

Frictional Torque

 

Uniform Pressure

Uniform Wear

(1) Flat pivot Bearing

(2) Conical Pivot Bearing

(3) Trapezoidal conical pivot bearing

(4) Flat collar Bearing

(5) Single Disc or plate clutite

 

(6) Coneflutual

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More Cone Clutches Questions

Q1.___ are the devices used to engage or disengage two rotating machine components as and when desired.
Q2.Which of the following statements are correct in the case of torque transmission through a cone clutch? I. Torque capacity is directly proportional to sin α, where α is half cone angle. II. If half cone angle (α) is less than the angle of static friction, then cone clutch has tendency to self engage. III. For the given dimensions, torque capacity of cone clutch is higher than that of single plate clutch. IV. Width of friction lining does not affect the torque capacity. Choose the best answer from below:
Q3.Which of the following statements is TRUE for conical and single plate clutches, both having the same internal and external diameter and coefficient of friction?
Q4.A trenched conical pivot bearing has semi-cone angle α and the two radii are r1 and r2 respectively with r1 > r2. The coefficient of friction between the sliding surfaces is μ. For an axial thrust load of W kN, the reduction in torque due to friction (assuming uniform rate of wear) is
Q5.To avoid self-engagement in cone clutch, its semi-cone angle is always kept

More Friction Clutches Questions

Q1.What will be the average pressure in plate clutch when the axial force is 4 kN. The inside radius of the contact surface is 50 mm and the outside radius is 100 mm. Assume uniform wear. 
Q2.Under steady state operation of a cone clutch, if semi-cone angle (α) decreases then _____________.
Q3.A single plate clutch (both sides effective) has outer and inner diameters as 300 mm and 200 mm, respectively. The maximum intensity of pressure at any point on the contact surface is not to exceed 0.1 MPa. If the coefficient of friction is 0.2, then determine the power transmitted by a clutch at an angular speed of 300 rad/s. Assume uniform wear [assume π = 3.14].   
Q4.In a single plate clutch, considering uniform pressure, T= nμ WR. What is R equal to?
Q5.The maximum pressure intensity is given by
Q6.In a multiple disc clutch, if there are 4 discs on the driving shaft and 3 discs on the driven shaft, then the number of pairs of contact surfaces will be equal to _______.
Q7.Which of the components from the given figure is a clutch?
Q8.In case of a multiple disc clutch, if n1, are the number of discs on the driving shaft and n2 are the number of the discs on the driven shaft, then the number of pairs of contact surfaces will be:
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Q10.Normally the clutch is mounted between the:
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More Design of Machine Elements Questions

Q1.What will be the average pressure in plate clutch when the axial force is 4 kN. The inside radius of the contact surface is 50 mm and the outside radius is 100 mm. Assume uniform wear. 
Q2.In case of a flat pivot bearing, which of the following options is correct about the sliding friction? 
Q3.The bearing surface provided at any position along the shaft (but not at the end of the shaft) to carry the axial thrust, is known as ____________. 
Q4.What will be the power lost in friction assuming uniform pressure theory, when a vertical shaft of 100 mm diameter rotating at 150 r.p.m. rests on a flat end foot step bearing? The coefficient of friction is equal to 0.05 and the shaft carries a vertical load of 15 KN.
Q5.A bearing is designated by the number 410. It means that it is a bearing of:
Q6.Which of the following elements is not used as a roller in roller bearings?
Q7.In 6 × 19 designation of wire rope, the numbers of 6 and 19 represent :
Q8.Which of the following statements related to rope drives is INCORRECT?  
Q9.Under steady state operation of a cone clutch, if semi-cone angle (α) decreases then _____________.
Q10.A single riveted lap joint is made in 10 mm thick plates with 20 mm diameter rivets. Determine the bearing strength of the rivet if stresses in bearing is 150 MPa.
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