4 Types of Hydraulic Motors You Should Know About

Blog | February 9th, 2022

Many industries would typically utilise hydraulic motors in powering up machines and equipment pieces. Hydraulic motors often maximise pressurised hydraulic fluid in generating rotational kinetic energy. This type of energy is then transferred to mechanical components of the said things.

There are a couple of reasons why hydraulic motors can benefit industries. For one, hydraulic motors can easily ensure that a significant amount of power is transferred despite maximising less energy. They can also be accurate in terms of dispensing rotational kinetic energy to the mechanical machines and equipment pieces. Ultimately, they are easier to maintain compared to other types of motors.

To date, hydraulic motors can be grouped into different types based on their configuration. Some of the most common types of hydraulic motors are as follows:

  1. Gear Motors

Gear motors are comprised of similarly sized and symmetrical inlet and outlet ports, which help them in adapting to negative and positive rotation. They also have rolling bearings, which are meant to minimise friction torque during start-up. What is great about gear motors is that they are lightweight and easy to maintain. They likewise have compact form factor, impact resistance, and good oil suction capacity. Gear motors, however, have large pressure and torque ripple, low volumetric efficiency and input pressure, low starting torque, poor stability at low speed, and high noise.

  • Vane Motors

Vane motors, on the other hand, can be effective in applications that demand high speed, low torque, and sensitive motion thanks to their incorporated features. Similar to gear motors, vane motors also boast a compact form factor, making them suitable for any application. Vane motors likewise have a low moment of inertia, reputable flexibility, and high input speed. They can even remain stable despite working for a long time. Vane motors, however, also have some drawbacks. For one, they do not boast excellent anti-pollution capability. They also do not work steadily at low-speed operations.

  • Radial Plunger Motors

Radial plunger motions are low-speed and high-torque hydraulic motors that are further grouped into single-acting and multi-acting hydraulic motors. Single-acting hydraulic motors are comprised of housing, flow distribution valve, connecting rod, plunger, eccentric wheel, crankshaft, and other parts that help them provide reliable performance. They are, however, large and heavy. They likewise have poor stability at low speed. Multi-acting hydraulic motors, alternatively, have multiple plungers installed, which help in doubling their displacement, providing large output torque, and lowering torque ripple rate.

  • Axial Plunger Motors

Axial plunger motors operate by sustaining the placement of the oil distribution and the swash plates while allowing the motor shaft to rotate with the cylinder. The plunger then extends out whenever the pressure oil enters its hole through the oil distribution plate’s window. Once the pressure oil’s input direction shifts, the motor shaft will then turn to positive rotation. As for the changes in dip angle of the swashplate, the motors’ torque, speed, and rotary direction will be all affected. When maximising axial plunger motors, you must keep in mind that the greater the dip angle is, the more torque is produced.

To know more about these hydraulic motors, you can call us at Mobile Hydraulic Specialties.

Mobile Hydraulic Specialties Pty Ltd

Factory 89, 38-40 Popes Road
Keysborough, Victoria, 3173

Phone: (03) 9798-6511

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Contact Us

Mobile Hydraulic Specialties Pty Ltd

Phone: (03) 9798-6511
Address: Factory 89, 38-40 Popes Road, Keysborough, Victoria, 3173