基于机械系统运动学的滑阀泵滑阀杆不平衡力的计算

发布时间：2018-04-18 09:04

本文选题：滑阀杆 + 不平衡惯性力　；参考：《真空科学与技术学报》2016年09期

【摘要】：滑阀式真空泵的运动属于偏心运动,该泵的滑阀构件在工作中产生的不平衡惯性力引起泵的较大振动,但是长期以来无精确的计算滑阀不平衡惯性力的方法,因此确定滑阀的不平衡惯性力幅值成为降低滑阀泵振动的关键所在。本文运用机械系统运动学理论推导了精确计算滑阀杆的不平衡惯性力的公式,计算了2H-150型双级滑阀真空泵滑阀杆在一个工作周期内的不平衡惯性力。计算获得了滑阀杆不平衡力幅值的精确值,计算结果表明,滑阀杆的大小和方向是不断发生变化的,引起的振动是非简谐振动。根据滑阀杆不平衡惯性力的计算结果进行动平衡配重,配重后的滑阀泵振动力和振动位移大幅度下降。结果表明该方法正确可靠,为滑阀泵减振分析提供了准确数据。
[Abstract]:The motion of the sliding valve vacuum pump belongs to eccentric motion. The unbalanced inertial force produced by the slide valve component of the pump causes the pump to vibrate greatly, but there is no accurate method to calculate the unbalanced inertia force of the slide valve for a long time.Therefore, determining the amplitude of the unbalanced inertial force is the key to reduce the vibration of the slide valve pump.Based on the kinematics theory of mechanical system, the formula for calculating the unbalanced inertial force of sliding valve stem is derived, and the unbalanced inertia force of 2H-150 type double-stage slide valve vacuum pump slider stem in one working cycle is calculated.The exact value of the unbalance force amplitude of the sliding-valve stem is obtained. The calculation results show that the size and direction of the sliding-valve stem are constantly changing and the vibration caused by the sliding-valve stem is non-harmonic.According to the calculation results of the unbalanced inertia force of the sliding valve stem, the dynamic balancing weight is carried out, and the vibration force and the vibration displacement of the slide valve pump after the balance are greatly reduced.The results show that the method is correct and reliable and provides accurate data for vibration reduction analysis of sliding valve pump.
【作者单位】：合肥工业大学机械与汽车工程学院;
【分类号】：TB752

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