Hydraulic motor Like the hydraulic pump, the mechanical energy conversion depends on the volume change on the airtight work, and it also has a flow distribution mechanism. Under the action of the input high pressure liquid, the liquid inlet chamber of the hydraulic motor is expanded from small to small, and the torque caused by rotating the prefabricated components is used to solve the torque of load resistance and rotate; In addition, the liquid collecting chamber of the motor changes from large to small, and liquid is collected to the suction pipe mouth of the car oil tank or pump, so the pressure decreases. High pressure liquid constantly enters from the liquid leakage port of the hydraulic motor and discharges from the liquid return port, then the motor rotor of the hydraulic motor continues to rotate and expand to do work.

Theoretically, in addition to the hydraulic pump with valve type flow distribution, Conveyor belt cycloidal hydraulic motor The hydraulic pump and hydraulic motor of other methods are cross functional and can be mutually used. In fact, due to different performance parameters and requirements, the pump and motor structure types of the same method are still different.

(1) The hydraulic motor is driven to rotate by the liquid with pressure input, so as to ensure the initial sealing as far as possible, without the need for self-priming capability. The hydraulic pump generally has self-priming capacity as far as possible.

(2) The hydraulic motor should be able to rotate forward and backward, so WK series products Hydraulic transmission The internal structure of system equipment shall be symmetrical as far as possible. Generally, the hydraulic pump rotates on one side, and the structure type does not have this limitation.

(3) The transmission ratio range of the hydraulic motor is very large, especially when the speed is low, the hydraulic motor of the emergency plunger pump should be able to ensure all normal work, so needle bearing or negative pressure roller bearing should be used; If air pressure roller bearing is used, it is not easy to cause lubricating grease film. The speed of the hydraulic pump is relatively high, and the change is generally small, so there is no such requirement.