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液壓系統之液壓沖擊的控制
液壓沖擊發生的緣由及其損害
在良多機械液壓系統中,就是由于某種緣由導致的液體壓力快速急劇替代升降的阻尼動搖進程工作,被稱為液壓沖擊。液壓系統在發生這種
液壓沖擊的主要緣由如下。
(1)閥門驟然封鎖或敞開
當液體在管道中流動工作時,若是閥門驟然封鎖的話,液體流速將隨之驟然下降到零,在這一會兒的時間液體的動能轉化為壓力能,迫使液
體壓力俄然升高、而且構成壓力沖力波。反之,當閥門驟然敞開時,則就會呈現壓力下降降低。
(2)執行機構的慣性力
假如高速運動的液壓執行機構的慣性力也可能會導致系統中的液壓沖擊。例如,液壓挖掘機反轉馬達在制動和換向時,因排油管路溘然被封
閉,但反轉臺由于慣性還在持續滾動,將會導致壓力急劇升高而發生液壓沖擊。
(3)元件反響動作不敏捷
液壓系統中某些元件反響動作不敏捷,也能夠形成液壓沖擊。如限壓式變量泵,當壓力升高時不能及時減小排量而形成壓力沖擊;滋流閥不
能靈敏打開而形成過大壓力超調等。
液壓的沖擊使機器系統的瞬時壓力較正常工作壓力要大好幾倍.所以,常使液壓元、輔件、管進及密封設備損壞,導致體系轟動和噪聲。因此
,準確剖析、核算并采納有用辦法避免或減小液壓沖擊,關于高精加工設備、儀器儀表等主機的液壓系統是適當重要的。
廣東液壓系統設計廠家
DH:0769-22859339
SJ:13925501948 13925539480 13925580728
LXR:周國強
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Gold in the hydraulic system design and processing manufacturers, supporting the design of the hydraulic system manufacturers
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 kib2bic 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 免費信息mutation , 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 ) 免費信息ponents response action is not agile
Some 免費信息ponents 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: 交易信息.pumps88.免費信息 交易信息.yeyaxt.免費信息 交易信息.jzyyz.免費信息