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Hydraulic Pumps – Fluid in Motion

Hydraulic pumps transform mechanical energy into hydraulic fluid power. The principle behind hydraulic pumps is simple. Force applied in one place is transferred to another using an incompressible fluid like oil. This fluid cannot be compressed but can be displaced by pressure. The main components of a hydraulic pump are a reservoir, a hydraulic piston rod, and a pump.

The piston rod is pushed up by hydraulic fluid being pumped from the reservoir to the bottom cavity. This pushes the fluid back into the reservoir. This pressurizes and lengthens the piston. The piston rod is pushed down by hydraulic fluid. This pushes oil from the other chamber back into the reservoir. To buy the best hydraulic pumps, you ought to find a reliable hydraulic pump manufacturer in the market.

Most Popular Hydraulic Pump Types

Vane pumps, piston pumps, and gear pumps are the foremost types of hydraulic pumps

Gear pumps

A gear pump uses gears to pump fluid by displacement. Hydraulic gear pumps are one of the most common types of pumps. There are several advantages and disadvantages to gear pumps. The advantages are: high speed, high pressure, and quiet operation. The disadvantages are the use of four bushings in the liquid area and fixed end clearances.

Rotary vane pumps

These are positive-displacement. They include a ring mounted inside a cylindrical case. There are a number of radial slots in which sliding vanes are located. Mounted to the case is the ring and the vanes are designed to press against the inside wall of the case. Hydraulic pressure or spring force or centrifugal force as the ring is rotated will cause the vane to be forced against the wall.

Axial piston pumps

These are positive displacements. There are several pistons in a circular arrangement in a cylinder block.

Radial piston pumps

A circular arrangement of hydraulic pistons, and valves that allow pressures greater than 650 Bar (10,000 psi) to be built.