[Copy] Engineering mining machinery parts Hydraulic valve cartridge balancing valve RPGE-LCN

   Hydraulic valve is an automatic component operated with pressure oil, it is controlled by pressure valve pressure oil, usually combined with electromagnetic pressure valve, can be used for remote control of hydropower station oil, gas, water pipeline system. Commonly used for clamping, control, lubrication and other oil circuit. There are direct action type and pioneer type, multi-use pioneer type. The role of the hydraulic valve is mainly used to reduce and stabilize the oil pressure of a branch in the system, and it is often used for clamping, controlling, lubricating and other oil circuits. There are direct moving type, leading type and superposition type. A component used in hydraulic transmission to control the pressure, flow, and direction of liquids. The pressure control valve is called the pressure control valve, the flow control valve is called the flow control valve, and the control on, off and flow direction is called the direction control valve. Classification of hydraulic valves: classification by function: flow valve (throttle valve, speed regulating valve, diverter valve, collecting valve, diverter collecting valve), pressure valve (relief valve, pressure reducing valve, sequence valve, unloading valve), direction valve (electromagnetic reversing valve, manual reversing valve, check valve, hydraulic control check valve)

Pilot relief valves are available in a variety of configurations. A typical three-section concentric structure pilot relief valve, which is composed of two parts: pilot valve and main valve.

The taper pilot valve, the damping hole (fixed throttle hole) on the main valve spool and the pressure regulating spring together constitute the pilot half-bridge partial pressure negative feedback control, which is responsible for providing the main stage command pressure after the pilot valve pressure regulation to the upper chamber of the main valve spool. The main spool is the comparator of the main control loop. The upper end face acts as the command force of the main spool, while the lower end face acts as the pressure measuring surface of the main loop and acts as the feedback force. The resultant force can drive the spool, adjust the size of the overflow port, and finally achieve the purpose of regulating and regulating the pressure of the inlet pressure P1.

YF type three-section concentric pilot relief valve structure Figure 1-(- taper valve (pilot valve); 2 - Cone seat 3 - valve cover; 4 - Valve body; 5 - damping hole; 6 - main valve core; 7 - Main seat; 8 - main valve spring; 9 - pressure regulation (pilot valve) spring; 10 - adjusting screws; 11 - Adjust the handwheel