PQRS is a four bar chain with PS fixed length of links are PQ = 62.5 mm, ........
4
State the type of power transmission chains. Describe any one with its sketch.
Types of power transmission chains :
Write the procedure for balancing of a single rotating mass by single masses rotating in the same plane.
Why roller follower is preferred over a knife follower ? State two advantages and application of roller follower.
In case of knife edge follower there is sliding motion between the contacting surface of cam and follower. Because of small contact area, there is excessive wear; therefore it is not frequently used. Whereas in roller follower there is rolling motion between contacting surfacing and more contact area, therefore rate of wear is greatly reduced.
Advantages: i) Less wear, more life ii) Less side thrust as compared to knife edge follower.
Application: Used in stationary oil and gas engines
Draw a neat labelled sketch of “Multiplate Clutch”.
The central distance between two shaft is 4 m having two pulleys..........
Draw a neat sketch of radial cam with roller follower and show the following on it.........
Describe stepwise procedure for determination of velocity and acceleration by Klein’s construction with suitable data.
Steps in Klein’s construction :
Define linear velocity, angular velocity, absolute velocity and state the relation between linear velocity and angular velocity.
Explain with neat sketch working principle of Oldham’s coupling.
When the driving shaft A is rotated, the flange C (link 1) causes the intermediate piece (link 4) to rotate at the same angle through which the flange has rotated, and it further rotates the flange D (link 3) at the same angle and thus the shaft B rotates. Hence links 1, 3 and 4 have the same angular velocity at every instant. A little consideration will show that there is a sliding motion between the link 4 and each of the other links 1 and 3.
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