The factors that cause the hydraulic motor to creep at low speed

1. The amount of leakage is unstable. Its leakage is not the same every moment, it fluctuates periodically with the change of the phase angle of rotor operation. Because the flow into the motor at low speed is relatively small, the proportion of leakage is relatively large, and the instability of the leakage will obviously interfere with the flow value of the motor, thus making the motor speed unstable. 
2. The magnitude of the friction force is unstable. Ordinary friction increases with the increase of speed, but the frictional resistance inside the motor running in the static and low-speed area is not this law. When the working speed increases slightly, the frictional resistance not only does not increase, but decreases on the contrary. . On the other hand, the hydraulic motor and load are pushed by the pressure rise after the hydraulic oil is compressed. 
3. The motor speed is too low. When the motor speed is too low, the gap between the machines will inevitably cause leakage, and the amount of leakage in each plunger will be different, which will lead to discordant sliding between the motor speed and the crankshaft. Macroscopically, it is the motor. crawling phenomenon.

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