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Hydraulic components are the core components that make up a hydraulic system. The hydraulic system operates based on Pascal's law and uses sealed liquid to transmit pressure to achieve energy conversion and power control.
A complete hydraulic system typically consists of five parts
Power components, such as hydraulic pumps (gear pumps, vane pumps, plunger pumps), convert mechanical energy into hydraulic energy.
Execution components, such as hydraulic cylinders (producing linear motion) and hydraulic motors (producing rotational motion), convert hydraulic energy into mechanical energy.
Control components: including directional control valves (such as directional valves), pressure control valves (such as relief valves), and flow control valves, used to regulate the pressure, flow rate, and direction of liquids.
Auxiliary components such as fuel tanks, filters, oil pipes, sealing devices, etc., ensure stable operation of the system.
Working medium: usually hydraulic oil, which plays a role in transmitting energy, lubrication, and cooling.
Hydraulic components can be divided into industrial equipment, walking machinery (such as excavators and cranes), and aerospace and navigation specialized components according to their application fields, among which walking machinery components need to withstand higher power density and impact pressure.
Common types of hydraulic valves include direct acting relief valves, pilot operated relief valves, etc. Their machining accuracy can reach the micrometer level, directly affecting the controllability and stability of the equipment.
Installation and maintenance precautions
During installation, it is necessary to ensure that the performance level of the valve body connecting screws meets the requirements, tighten them evenly, and avoid tilting or forcibly twisting them.
Pay attention to the orientation of the inlet and return ports to prevent accidents caused by reverse installation; Directional valves should generally be installed horizontally.
Hydraulic oil pipes should be made of suitable materials to ensure smooth and clean inner walls and avoid contamination; The system has strict requirements for oil cleanliness and requires regular replacement of filters and hydraulic oil.
Regularly inspect the seals to prevent leakage and ensure the accuracy of pump installation alignment (with a deviation of less than 0.1mm for different shaft degrees).
The advantages of hydraulic systems include high power density, flexible layout, and smooth control, but strict maintenance is required to avoid malfunctions caused by pollution or leakage.
The industry is developing towards intelligence (such as chip based hydraulic components) and greenness (such as hydraulic transmission technology).