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Kinematics Modelling and Simulation of Emulsion Pump Valve

机译:乳液泵阀的运动学建模与仿真

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Based on the continuity equation, the dynamic equation of the pump valve and the compressibility of the emulsion, the kinematics models of the pump valve in normal and valve spring abruption condition are established. The simulation results show that the loss of volumetric efficiency is inevitable because of the opening and closing hysteresis characteristic of the pump valve caused by the Westphal's phenomenon of the pump valve and the compressibility of the emulsion. The breakdown of the valve spring will deteriorate the opening and closing hysteresis characteristic and reduce the volumetric efficiency of the emulsion pump further. At the same time the falling speed of the valve disc will increase steeply to exceed the maximum permission speed. So the valve disc will impact at the valve seat or the lift limiter intensively to damage the pump valve. Through the identification of the impulse between the valve disc and the valve seat or the lift limiter, we can realize the diagnosis of the spring abruption fault of the pump valve correctly and effectively.
机译:基于连续性方程,建立了泵阀的动态方程和乳液的可压缩性,建立了正常和阀弹簧突发条件下泵阀的运动学模型。仿真结果表明,由于Westphal的泵阀现象和乳液的可压缩性引起的泵阀的开启和关闭滞后特性,体积效率的损失是不可避免的。阀弹簧的击穿将使开启和关闭滞后特性劣化,并进一步降低乳液泵的体积效率。同时阀盘的下降速度将急剧增加以超过最大允许速度。因此,阀盘将在阀座或电梯限制器中强烈冲击以损坏泵阀。通过识别阀盘和阀座之间的脉冲或升力限制器,我们可以正确且有效地实现泵阀弹簧突发性故障的诊断。

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