Before we begin looking at different types of hydraulic motors, it is worth reminding ourselves how hydraulic systems work and the role that a hydraulic motor plays within the overall system.
Hydraulic systems are designed to transmit power, in a controlled way, through the use of pressurised liquids. Within a hydraulic system, the hydraulic pump ensures the continued flow of fluid. Pressure can then be created by the careful design of applied forces and the gauge of pipes. The hydraulic motor then converts the kinetic energy of flow and the fluid pressure into rotary motion.
There are two different types of actuators in a hydraulic system: rotary actuators (or hydraulic motors) and linear actuators (or cylinders).
There are also semi-rotary actuators like helical, rack and pinion, and vane actuators, illustrated left to right in the image here.
Deciding which hydraulic motor is right for your application will depend on a number of factors:
● Speed
● Torque
● Range
● Physical characteristics such as robustness, weight, size, etc.
● Ease of service / maintenance
● Acceptable noise levels
● Compatibility with the other components in your hydraulic system
GRH looks at how a hydraulic motor works in order to explain their advantages. Using an industrial construction vehicle to illustrate a typical hydraulic application, it shows how the vehicle’s diesel engine converts the chemical energy of the fuel into rotational energy.
The hydraulic pump then converts the rotational energy into a combination of kinetic and potential energy. Then the hydraulic motor converts the kinetic / potential energy back into rotational energy.
Why are these energy conversions important? Because it makes for greater control and, since most rotary actuators are designed to be bi-directional, it means that reverse motion is possible.
If you would like to learn more about different types of hydraulic motors, Please contact us.
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