Question

(a) Sketch a line diagram showing the layout components of a hydraulic system with a variable delivery, pressure compensated pump and accumulator, suitable for the operation of deck machinery. (8)

(b) Describe the operation of the system sketched in (a). (8)

Answer 1

Part (a)

Part (b)

Constant Pressure System uses one or more variable delivery pumps which supply oil at nearly constant pressure to either a system of multiple loads or a single load such as a hydraulic crane.

When the pumping capacity exceeds load requirements, the system pressure increases above a set value, at which point the pressure compensator acts to take the pump off stroke. A relief valve is fitted in case of malfunction of the compensator.

Fluid flow to the load may be controlled by a variety of methods one of which is the simple three position valve shown.

This system suits an installation containing several high demand units such as deck winch hydraulics

✓ Verified Model Answer (Text Solution)

Constant Pressure System uses one or more variable delivery pumps which supply oil at nearly constant pressure to either a system of multiple loads or a single load such as a hydraulic crane.