液压系统之液压冲击的控制
液压冲击发生的缘由及其损害
在良多机械液压系统中，就是由于某种缘由导致的液体压力快速急剧替代升降的阻尼动摇进程工作，被称为液压冲击。液压系统在发生这种
液压冲击的主要缘由如下。
(1)阀门骤然封锁或敞开
当液体在管道中流动工作时，若是阀门骤然封锁的话，液体流速将随之骤然下降到零，在这一会儿的时间液体的动能转化为压力能，迫使液
体压力俄然升高、而且构成压力冲力波。反之，当阀门骤然敞开时，则就会呈现压力下降降低。
(2)执行机构的惯性力
假如高速运动的液压执行机构的惯性力也可能会导致系统中的液压冲击。例如，液压挖掘机反转马达在制动和换向时，因排油管路溘然被封
闭，但反转台由于惯性还在持续滚动，将会导致压力急剧升高而发生液压冲击。
(3)元件反响动作不敏捷
液压系统中某些元件反响动作不敏捷，也能够形成液压冲击。如限压式变量泵，当压力升高时不能及时减小排量而形成压力冲击；滋流阀不
能灵敏打开而形成过大压力超调等。
液压的冲击使机器系统的瞬时压力较正常工作压力要大好几倍.所以，常使液压元、辅件、管进及密封设备损坏，导致体系轰动和噪声。因此
，准确剖析、核算并采纳有用办法避免或减小液压冲击，关于高精加工设备、仪器仪表等主机的液压系统是适当重要的。
广东液压系统设计厂家
DH：0769-22859339
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LXR：周国强
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Hydraulic control system for hydraulic shocks and hydraulic shock cause damage occurred
In many mechanical hydraulic system, is caused due to some reason the liquid pressure damping quick shake down sharply alternative work process , known as hydraulic shock . Hydraulic system hydraulic shock in the event of a major reason for this is as follows .
( 1 ) blocked or open the valve suddenly
When the liquid flowing through a pipe work, if the valve suddenly blocked , it will follow the liquid flow rate plummeted to zero , at which time the liquid while the kinetic energy into pressure energy , forcing the liquid pressure suddenly increased and the pressure impulse wave . Conversely , when the valve is suddenly opened , the pressure drop will be presented lower .
( 2 ) the inertia force actuator
If the high-speed movement of the hydraulic actuator inertia force may also cause the system hydraulic shock . For example , hydraulic excavators braking and reversing the motor commutation , because Passed drain passage is closed , but the inversion table because of the inertia continues rolling , will result in a sharp increase in pressure hydraulic shock occurred .
( 3 ) Components response action is not agile
Some components in the hydraulic system response action is not quick , but also to the formation of hydraulic shock . Variables such as the limited pressure pump when the pressure rises can not be reduced displacement and the formation pressure shocks ; mayonnaise sensitive valve can not open too much pressure on the formation of such overshoot .
The impact of hydraulic system of the machine than the normal operating pressure transient pressure be several times larger , so often makes hydraulic yuan, accessories, pipe inlet and sealing equipment damage , resulting in system sensation and noise. Therefore
And accurate analysis, accounting and adopt useful for a way to avoid or reduce the hydraulic impact on high- finishing equipment , instrumentation , etc. The hydraulic system is the appropriate host
Guangdong manufacturers of hydraulic system design
DH :0769-22859339
SJ: 13925501948 13925539480 13925580728
LXR: Zhou Guoqiang
GW: www.pumps88.com www.yeyaxt.com www.jzyyz.com