Shandong ReeWo hydraulic technology co.Ltd.
Factors causing low-speed creep in hydraulic motors
Release time:
2019-04-02
Source:
1. The leakage volume is unstable in magnitude. Its leakage rate is not constant at every instant; rather, it fluctuates periodically as the rotor’s phase angle changes during operation. At low speeds, the flow entering the motor is relatively small, so the proportion occupied by leakage becomes relatively large. Consequently, the instability of the leakage volume significantly interferes with the accuracy of the flow rate at which the motor operates, thereby causing instability in the motor’s rotational speed.
2. The magnitude of friction is unstable. Normally, friction increases as the speed rises; however, inside a motor operating in static and low-speed regions, the frictional resistance does not follow this pattern. When the operating speed slightly increases, the frictional resistance not only fails to rise but actually decreases. On the other hand, in a hydraulic motor, the load is driven by the increase in pressure resulting from the compression of hydraulic oil.
3. The motor speed is too low. When the motor speed is excessively low, unavoidable leakage occurs due to clearances between mechanical components. Moreover, the amount of leakage varies among different piston chambers, leading to an asynchronous sliding motion between the motor’s rotational speed and the crankshaft—this manifests macroscopically as the motor’s creeping phenomenon.
Previous page
Next page
News Center