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Hydraulic motor at low speed crawl phenomenon causes |
Hydraulic motor is the main reason of the crawling phenomenon during low speed on the following two points; (1) the size of the friction force is not stable. Is usually the friction increases with speed increased, while in a stationary and low-speed motor internal frictional resistance area, when work speed rather than increase, reduce instead, formed the so-called "negative" resistance. Hydraulic motor and load, on the other hand, is the mooring was compressed by hydraulic pressure and was driven. (2) leakage size is not stable. Not every moment in the leakage of hydraulic motor is the same, it varies phase Angle of the rotor rotation as a cyclical fluctuations. Due to low speeds into the small motor traffic, proportion of leakage is larger, leakage of instability will significantly affect the motor work flow numerical, causing speed fluctuations. |