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一、液压冲击在液压系统中,当突然超动或停机、变速或换向而引起液流方向的迅速改变或停止时,由于流动液体和运动部件的惯性,使系统内瞬时出现很高的压力,这种现象称为液压冲击. 液压冲击不仅会影响液压系统的性能稳定和工作可靠性,还会引起振动和噪声、联接件松动,甚至使管路破裂、液压元件和测量仪表损坏。在压力高、流量大的系统中其后果更为严重.因此,研究液压冲击的产生原因及防止方法,对提高液压系统性能的稳定性和可靠性有着非常重要的意义. 1.产生液压冲击的原因 (1)由冲击波引起: 在对M7120A平面磨床工作台换向进行液压调试
First, the hydraulic impact In the hydraulic system, when a sudden move or stop, speed or commutation caused by the rapid change of flow direction or stop, due to the inertia of moving liquid and moving parts, the system instantaneous high pressure , This phenomenon is called hydraulic impact.Hydraulic impact not only affects the stability and reliability of the hydraulic system performance, but also cause vibration and noise, loose coupling, and even rupture of the pipeline, hydraulic components and measuring instruments damage. In the system of high pressure and large flow, the consequences are more serious. Therefore, it is very important to study the causes and prevention methods of hydraulic impact to improve the stability and reliability of the hydraulic system. The reason (1) caused by the shock wave: In the M7120A plane grinder table for hydraulic commissioning