Dowty Hydraulic Pump

A gear pump uses the meshing of gears to pump fluid by displacement. They are one of the most common types of pumps for hydraulic fluid power applications.   luids discharged from a gear pump generally flow with low pressure pulsations which results in a ‘smooth’ and constant flow. The flow rate through the pump directly correlates with the speed at which the gears rotate, which makes the gear pump a good choice of pump for metering applications (where the amount of flow needs to be measured accurately).

Gear pumps are usually electrically driven using an electric motor, but they may also be hydraulically or mechanically driven, depending upon the design and application. For example, many tractors use gear pumps for on-board hydraulic systems (raising and lowering a plough etc.), and the pump is connected mechanically to the tractor’s engine.

A gear pump’s speed of rotation and tight mechanical clearances minimise the amount of fluid flowing in the wrong direction (leakage); reduced leakage leads to higher pump efficiency.