Simple explanation hydraulic pneumatic valve and hydraulic support the operation principle of 2

early hydraulic support, there is no other sealing measures between kinematic pair, is direct contact with the metal seal, requiring the seal contact surface, has high machining accuracy, otherwise must increase the adhesion strength of the seal, and make the contact surface to produce plastic deformation, plug leak path. A complete hydraulic system consists of five parts, namely, power components, actuators, control components, no parts and hydraulic oil. Is the role of dynamic components can prime mover's mechanical energy into the pressure of the liquid. Hydraulic support is the supporting equipment in coal mining machinery, after overhaul in general can use five years, but the service life of all kinds of hydraulic pneumatic valve in hydraulic support is very low, long months, short only a few weeks, the way and solution is to increase system abroad filtering precision and improve the quality of the emulsion, but it is not big. In Britain, a hydraulic pneumatic valve as an example, although the machining accuracy and the whole hydraulic system filtration precision is high, but because of low service life, has been facing elimination in our country. Early hydraulic support, there is no other sealing measures between kinematic pair, is direct contact with the metal seal, requiring the seal contact surface, has high machining accuracy, otherwise must increase the adhesion strength of the seal, and make the contact surface to produce plastic deformation, plug leak path. A complete hydraulic system consists of five parts, namely, power components, actuators, control components, no parts and hydraulic oil. The role of dynamic components is the prime mover can convert the mechanical energy of liquid pressure, refers to the oil pump in the hydraulic system, it supplies power to the entire hydraulic system. The structure of hydraulic pump generally have gear pump, vane pump and piston pump. Actuators ( As is the role of the hydraulic cylinder and hydraulic motor of the liquid pressure can be converted into mechanical energy, drive the load for a straight line reciprocating movement or rotational motion. Control components ( The various kinds of hydraulic pneumatic valve in the hydraulic system control and adjustment of the liquid pressure, flow and direction. According to the different control functions, hydraulic pneumatic valve can be divided into the village of force control pneumatic pneumatic valve and directional control valve, flow control pneumatic valve. Pneumatic pressure control valve is divided into benefits flow pneumatic valve ( Pneumatic valve, relief valve, sequence pneumatic safety valve, pressure relays, etc. ; Flow control pneumatic valve includes throttle pneumatic valve, pneumatic valve adjustment, shunt collector pneumatic valve, etc. ; Direction control pneumatic valve includes a one-way pneumatic valve, hydraulic control one-way pneumatic valve, pneumatic valve, reversing valve, etc. According to different control mode, hydraulic pneumatic valve can be divided into the switch type pneumatic control valve, the constant value control of pneumatic valve and proportional control pneumatic valve. Auxiliary components including oil tank, oil filter, oil pipe and pipe joint, seal oil temperature, oil pressure gauge, a meter, etc. Hydraulic oil is the working medium of transmit energy in hydraulic system, there are all kinds of mineral oil, emulsion and molding hydraulic oil etc. Several categories. http://www pneumatic pneumatic valve manufacturer. /。