In the late 1950s, the first low-speed gear with large torque Hydraulic motor It is formed by the development trend of a stator motor component of the oil pump, which is composed of an internal gear and a matching transmission gear or motor rotor.

1、 Weak rotation of low-speed high torque hydraulic motor

The hydraulic motor is an actuator built on Hydraulic transmission At the end of the system, the hydraulic function is transformed into mechanical kinetic energy to make the service platform rotate. This motor is a hydraulic motor with radial plunger point contact and transfer speed ratio.

1. Condition

The rotation rate of the service platform is less than 6r/min during operation

2. Root cause

The structure and principle of the hydraulic motor and the axial piston pump are basically the same. The axial piston pump uses the driving force caused by oil removal and pressure, that is, to convert chemical energy into liquid pressure energy. The hydraulic motor receives high pressure oil and discharges low pressure oil, which transforms the liquid pressure energy into mechanical kinetic energy. Because of this, the hydraulic motor is essentially equivalent to the composition of several double cylinder plunger cylinders, that is, several unilateral hydraulic cylinders are evenly distributed in the circumference, and the outer edge of the plunger is against the swashplate. When the oil pump supplies pressure oil to the hydraulic cylinder, the plunger extends under the effect of pressure oil, Cycloidal hydraulic motor of mixer And it descends on the swashplate, so a torque occurs. The oil pump continuously supplies pressure oil to the hydraulic motor, and the hydraulic motor keeps rotating, and pushes APP to rotate according to the gear box that makes the final transmission gear mesh with the fixed internal gear of the window frame.

It can be seen from the above that the structure and principle of the hydraulic motor are basically the same as those of the oil cylinder mentioned above. If the rotation speed of the hydraulic motor is slow, its analysis, diagnosis and solution are similar to those of the oil cylinder and axial piston pump designed by the system in operation, so there will be no more explanation here. Please refer to the above contents when analyzing, diagnosing and clearing common faults of hydraulic motor.