Hydraulic motor It is used to drive various working mechanisms, so the most important working parameters are the torque and speed of the output.

1、 Torque

The average theoretical torque of wave pressure motor is

T1=q△p/2π

Where

Q - theoretical discharge of motor, i.e. average geometric discharge, (q) is m ³/r

△ p - pressure difference between the inlet and outlet of the motor, (△ p) is Pa

T1 - average theoretical torque of motor output, (T1) is N.m

Due to various mechanical losses, the actual output torque of the motor shaft is

T =T1ŋm

Where ŋ m -- mechanical efficiency of motor.

Due to the influence of the geometric parameters of the motor structure, the instantaneous theoretical torque T of some types of motors has pulsation. Ma Dayu

The maximum Tmax and minimum Tmin of the instantaneous theoretical torque. The ratio between the difference and its average theoretical torque T1, called

Is the torque non-uniformity coefficient δ r, that is

8r=

Middle Tahax - Toimin

If the inlet and outlet pressure difference OP and angular speed of the motor. unchanged,

Then the instantaneous theoretical torque Tas

It has the same law as the instantaneous flow Qa. Therefore, according to the instantaneous flow law Qu (9) of the same type of pressurized system

The law of instantaneous torque of the press motor is really obtained

The special moment non-uniformity coefficient is equal to the flow fluctuation coefficient.