In view of the shortcomings in the design of rail Pushers, a hydraulicpusher for long rail was designed according to the principle of hydraulic constant power speed regulation.
针对目前钢轨助推器设计上存在的不足，利用液压恒功率调速原理，设计了长钢轨液压助推器。
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A new-type hydraulicpusher is designed in order to improve the automation of tram operation in coal mine, which rises the reliability and efficiency of the original cage pusher.
Some problems in the hydraulic system of JT5-2 Pusher of JN50-02 coke oven in Masteel are briefly introduced. Ways to reveal the problems, the technical revamping and its results are also discussed.