Hydraulic Pump Motor

A hydraulic pump motor is being used to convert the fluid’s potential energy or kinetic energy into a mechanical energy. It is considered as a mechanical actuator that can convert hydraulic pressures and flow into an angular and torque displacement.

A hydraulic pump motor is also capable of reversing the direction and serve as a pump when it is powered using a mechanical source. A hydraulic pump motor can be used to interchange with a pump sometimes. On the other hand, a hydraulic pump generally cannot be used as a hydraulic motor due to the fact that hydraulic pumps cannot be back driven. Hydraulic drive systems consist of hydraulic motors, pumps and cylinders.

Types Of Hydraulic Pump Motor

There are many types of hydraulic pump motors. There are some important operating and component specifications that should be considered when searching for the right pump motor.

- The gear and vane motors are one of the many types of a hydraulic motor and these types can be used when you need simple rotating systems. Vane motors are usually housed and come with an eccentric bore where a rotor with vanes slides in and out. Vanes are being used to generate mechanical energy. Pressurized fluid strikes the vane’s blades which causes it to rotate and to produce torque as an output. A gear motor, on the other hand, has two gears - idler gear and driven gear. This type of motor allows pressurized oil from one of the gears to be routed to a port which is an outlet. It ensures there is no backflow.

- Another type of a hydraulic pump motor is the axial piston motor which is being used in high quality rotating drive systems. To be able to generate mechanical energy, an axial-mounted piston is being used. High pressure flows into the motor forces the piston to move to generate an output, which is the torque.

- The radial piston motor is another type of hydraulic pump motor and is available in multi-lobe cam ring type and crankshaft type. This type of motor usually makes use of a piston which is mounted radially in the central axis where energy is being generated.

Factors To Consider When Selecting Hydraulic Pump Motor

When selecting a pump motor, there are some aspects that you need to consider before making a decision. This includes the operating pressure, the operating torque, operating speed, operating temperature and the maximum fluid viscosity.

The operating torque usually depends directly on the working fluid’s pressure that is being delivered into the motor. The operating pressure is the pressurized working fluid generated by an outside source and is being delivered into the hydraulic pump motor. The operating temperature is known as the temperature range of the fluid that the motor can actually accommodate, while the operating speed pertains to the speed of the rotation of all the moving parts in a hydraulic motor.

A hydraulic pump motor can be used in lots of applications such as rolls mills, winches and crane drives, excavators and so on. If you are having still deciding which among all these types of hydraulic motors is best for a specific application, it is advisable to do a little research on the internet or ask for help from the manufacturer or dealer, to make sure that you are getting the right type of hydraulic pump motor. It is important to check with the manufacturer or dealer if they also provide after-sales service like hydraulic pump repair and parts replacement.