Swash Plate –

It’s an inclined plate in axial piston pump on which all pistons are connected through piston rod. This swash plate is usually inclined.

Use –

It is helps to reciprocate the piston of axial piston pump while the cylinder block is rotating

Working:

Motor drives the shaft, which in turn rotates the entire cylinder block. The pistons are connected to inclined swash plate through piston rod. Now since swash plate is inclined and block is rotating, the piston reciprocates inside the barrel. The reciprocating motion of piston causes suction and delivery of fluid through inlet and outlet ports which come in front of outlet of piston. If we change the angle of swash plate i.e. θ if

a) θ = 0 then no flow of oil, because pistons are at same level. When θ = 0 swash plate is vertical. No reciprocation of piston, hence no flow.

b) θ = max or + ve, then x will be stroke length which is maximum and there will be maximum forward flow.

c) θ = - ve, then ‘x’ i.e. stroke length will be maximum in reverse direction and hence there will be reverse flow.

By changing the swash plate angle we can vary the stroke length of the piston. and also output flow can be changed.