How does the hydraulic motor work?

March 06, 2022

Hydraulic Motors and Hydraulic Pumps are both reversible hydraulic components and are the source of power for mechanical equipment machinery.
Not only do the two work the same, but the work is connected to each other.
The input of working fluid to any type of hydraulic pump can turn the hydraulic pump into a hydraulic motor, and conversely, the hydraulic motor becomes a hydraulic pump.
Because the two have the same basic institutional elements, they can convert each other periodically.
However, due to different working conditions, their performance requirements are different. Although the types are the same, they are still different.
Since the hydraulic motor usually uses a rolling bearing or a static pressure sliding bearing, and works under the input pressure oil condition, it is not necessary to have self-priming capability, but a certain initial sealing property is required to provide the necessary starting torque.
Due to these differences, the hydraulic motor and the hydraulic pump are similar in structure but cannot be reversible. Therefore, all of this requires that the hydraulic motor should be able to be positive and reverse, thus requiring its internal structure to be symmetrical; the speed range of the hydraulic motor needs to be large enough, especially its minimum stable speed.
When the magnetic flux directions generated by energizing the attracting coil and the holding coil are the same, the electromagnetic attraction forces are superimposed on each other, and the moving iron core can be attracted to move forward until the touch panel at the front end of the push rod turns the electric switch contact to close the potential motor main circuit.

When the magnetic flux generated by the energizing coil and the holding coil is opposite in direction, the electromagnetic attraction cancels each other, and under the action of the return spring, the movable member such as the movable iron is automatically reset, the contact pad is disconnected from the contact, and the main circuit of the motor is disconnected.