The inlet and outlet ports on the valve body of the Shanghai hydraulic valve block are directly connected to the pipeline through the pipe joint or flange. The connection method is simple and light, and it is widely used in mobile equipment or hydraulic components with small flow. The disadvantage is that the valve can only be distributed along the pipeline, and the assembly and disassembly maintenance is inconvenient.
The hydraulic valve plate valve is fixed to the transition plate by a mounting screw, and the inlet and outlet ports of the valve are connected to the pipeline through the transition plate. One or more valves can be installed on the transition plate. When the transition plate is installed with a plurality of valves, which is also called an integrated block, the oil passage between the valve and the valve installed on the integrated block communicates through the flow passage in the block, thereby reducing the connecting pipe. Because the plate valves are arranged in a centralized manner and do not affect the system piping during assembly and disassembly, they are easy to operate and maintain, and are widely used.
The hydraulic valve cartridge valve mainly has a two-way cartridge valve, a three-way cartridge valve and a threaded cartridge valve. The two-way cartridge valve is a multifunctional composite valve composed of a cover plate and a pilot valve, which is inserted into a valve body of a specific design process. Since the basic component of the cartridge valve has only two ports, it is called a two-way cartridge valve, or a cartridge valve. The valve has the characteristics of large flow capacity, good sealing, high automation and standardization. The three-way cartridge valve has a pressure port, a load port and a return port port, and functions as two two-way cartridge valves for independently controlling one load chamber. However, due to the generalization and modularity, it is far less than the two-way cartridge valve, so it has not been widely used. The threaded cartridge valve is a change in the connection mode of the two-way cartridge valve. Due to the threaded connection, the installation is simple and convenient, and the entire volume is relatively reduced.
The hydraulic control servo valve is an actuator that converts the electrical signal input into a high-powered pressure or flow pressure signal output in the servo system. It is one
Electro-hydraulic conversion and power amplification components. The servo valve has high sensitivity and fast speed, and can convert small electrical signals (such as 10 mA) into large hydraulic power (such as dozens of horsepower or more), which can drive various types of loads.
2. The electro-hydraulic proportional valve is a component in which the proportional electromagnet in the valve generates a corresponding action according to the input voltage signal, causing displacement of the working valve spool, and the valve port size is changed to complete the pressure and flow output components proportional to the input voltage. .
3. Hydraulic valves are components used in hydraulic transmissions to control fluid pressure, flow and direction. The pressure control valve is called a pressure control valve, the flow control valve is called a flow control valve, and the directional control valve is called to control the on, off and flow directions. The directional control valve is divided into a check valve and a reversing valve according to the purpose.
Whether the throttle valve will reduce the pressure, the formula on the book is related to the flow rate of the throttle valve and the pressure difference between the front and the back. If the inlet pressure P1 is constant, the outlet pressure P2 is guaranteed, if I press the oil pressure oil When the cylinder is connected, will it increase the flow rate of the throttle valve and increase the P2? The flow through the throttle valve is reduced again until P1 = P2.