隔膜真空泵传动机构平衡计算及性能仿真

Balance design and simulation for transmission mechanism of diaphragm pump

隔膜真空泵是工业中用于控制容器压强和实现真空的关键设备之一。在工作过程中真空泵因传动机构不平衡而导致机器振动和噪声过大,从而降低机器的性能和寿命,因此需要对传动机构进行平衡。将真空泵传动机构简化为曲柄滑块机构,运用质量代换方法,计算出使机构残余惯性力最小时的平衡配重,实现了机构的部分平衡。最后利用ADAMS软件,建立了真空泵的虚拟样机,对样机的不平衡惯性力进行了性能仿真,对平衡效果进行了验证,发现不平衡惯性力显著减小。

Diaphragm vacuum pump is one of the key equipment that is used to control the vessel pressure or to achieve a vacuum. During the running, there is excessive vibration and noise in the machine because of the unbalance of the transmission mechanism, inducing deterioration of the performance and shortening of the service life. Therefore, the balance design of the transmission mechanism is needed. In this paper, the transmission mechanism of the diaphragm vacuum pump is assumed as crank slider mechanism. By the application of quality - substitution method, the optimum balance weight is estimated to minimize the residual inertia force of mechanism. Finally, to test the effect of the balance design, the virtual prototype of the diaphragm vacuum pump is built and based on it the performance simulation of the mechanism is realized. The result shows that the unbalance inertia force of mechanism reduces significantly after the balance weight being added.