Research on hydraulic system with three-stage speed regulation of mine-used cable winding device
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摘要: 针对电缆卷放速度与连续采煤机行进速度不能同步的问题，在分析卷缆装置三级调速液压系统原理的基础上，建立了三级调速液压系统仿真模型。该系统利用节流阀与压力补偿阀组合设计降低了设计复杂性，避免了压力补偿阀不工作时带来的能量损耗；实现了液压马达110，80，50 r/min三级转速变化，从而实现了卷缆装置变速调节功能，保证了电缆卷放速度与连续采煤机行进速度的同步性。仿真和测试结果表明，节流阀控制较灵敏，回路流量变化较稳定；虽然在节流阀导通和截止瞬间管道流量存在轻微波动，但不影响整体控制效果；在压力补偿阀的作用下，系统管道压力基本稳定在14 MPa，达到了较好的稳压、控压效果；测试得到的液压马达转速和转矩变化趋势与仿真结果基本吻合，三级调速效果较为明显。Abstract: In view of the problem that cable winding speed cannot be synchronized with speed of continuous shearer, based on analysis of principle of hydraulic system with three-stage speed regulation of the cable winding device, simulation model of hydraulic system with three-stage speed regulation was established. The system uses combination design of throttle valve and pressure compensation valve to reduce design complexity and avoid energy loss when pressure compensation valve does not work. The three-stage speed regulation of 110, 80, 50 r/min of hydraulic motor is achieved, and so speed adjustment function of the cable winding device is realized, and synchronization of the cable winding speed and the continuous shearer traveling speed is ensured. The simulation and test results show that the throttle control is sensitive and the change of loop flow is stable; although there is slight fluctuation of pipeline flow at the opening and closing moments of the throttle valve, it does not affect the overall control effect; under the action of pressure compensation valve, the pipeline pressure of the system is basically stable at 14 MPa, which achieves good regulation and control effect of pressure; the test results of speed and torque trend of hydraulic motor are basically consistent with the simulation results, and the three-stage speed regulation effect is obvious.
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