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液压系统中,为了保证工作部件完成一定的动作和工作循环,以及保护系统安全可靠的工作,必须设置一些能控制液流压力、方向、流量的装置,这些装置统称为阀。通常,阀是按照它在系统中所起的作用来分类的,计有:1.压力控制阀。它用来控制油液的压力,属于这一类的有安全阀、过载阀、减压阀、平衡阀、背压阀等。2.流量控制阀。它用来控制油液的流量,属于这一类的有节流阀、限流阀、分流阀等。3.方向控制阀。它用来控制油流流动的方向,属于这一类的有换向阀、单向阀、液压锁等。一、安全阀和过载嗣安全阀和过载阀,用以保护液压系统和元件安全地工作.当系统中压力超过阀的调定值时,阀开启,将油从阀中释放出去,防止压力进一步升高。
Hydraulic system, in order to ensure that the working parts to complete a certain action and work cycle, and to protect the system safe and reliable work, you must set some to control the flow pressure, direction, flow devices, these devices collectively referred to as the valve. In general, valves are classified according to the role they play in the system, with the following: 1. Pressure control valve. It is used to control the pressure of oil, belong to this category a safety valve, overload valve, pressure reducing valve, balance valve, back pressure valve. 2. Flow control valve. It is used to control the flow of oil, have this type of throttle, flow restrictors, diverter valves and so on. 3 direction control valve. It is used to control the direction of flow of oil, belong to this category have a valve, check valve, hydraulic lock and so on. First, the safety valve and overload Si safety valve and overload valve to protect the hydraulic system and components work safely when the system pressure exceeds the valve set value, the valve opens, the oil released from the valve to prevent further pressure Rise.