To draw velocity diagram of slider crank mechanism
The crank of a slider crank mechanism rotates clockwise at a constant speed of 300 r.p.m. The crank is 150 mm and the connecting rod is 600 mm long. Determine : 1. Linear velocity and of the midpoint of the connecting rod, and 2. angular velocity of the connecting rod, at a crank angle of 45° from inner dead centre position.
P_{1}A = 300 mm; P_{2}B = 360 mm; AB = 360mm, and P_{1}P_{2} = 600 mm. The angle AP_{1}P_{2}= 60°. The crank P _{1}A has an angular velocity of 10 rad/s and an angular acceleration of 30 rad/s ^{2}, both clockwise. Determine the angular velocities of P_{2}B, and AB and the velocity of the joint B.
P_{Solution:}Given:N _{BO}= 300 r.p.m. or ω _{BO}= 2π × 300/60 = 31.42 rad/s; OB = 150 mm =0.15 m ; BA = 600 mm = 0.6m. We know that linear velocity of B with respect to O or velocity of B, v _{BO}= v _{B}= ω _{BO}× O _{B}= 31.42 × 0.15 = 4.713 m/s...(Perpendicular to B _{O})
Velocities in Slider Crank Mechanism
First of all draw the space diagram, to some suitable scale; as shown in Fig. Now the velocity diagram, as is drawn as discussed below:
The velocity diagram of slider crank was drawn and analysed.
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