The accessories involved in the hydraulic system of the hydraulic parts manufacturer are as follows:
Hydraulic pump: plunger pump, gear pump (internal mesh, external teeth), screw pump, vane pump, silent screw pump (our company's exclusive agent), and many control methods.
Hydraulic valve: servo valve, proportional valve, servo proportional valve, reversing valve, pressure reducing valve, throttle valve, speed regulating valve, hydraulic lock, one-way valve, relief valve, electromagnetic relief valve, synchronous valve, synchronous motor, explosion-proof valve, etc. The structure is plate type, tube type, threaded plug-in, two-way plug-in, superposition type.
Hydraulic actuator: hydraulic cylinder, hydraulic motor.
Accessories: filter, pressure gauge, pressure sensor, thermometer, temperature sensor, pressure relay, pressure gauge switch, exhaust valve, ball valve, butterfly valve, damping pad, bell cover coupling, motor, level gauge, displacement sensor, rubber tube assembly, transition joint.
Summary of hydraulic system and all kinds of hydraulic parts
01. The hydraulic system didn't work for a long time. After the machine was started, the vibration was very severe and the noise was very loud. What's the reason?
Summary: it may be that the accumulator nitrogen leaks after a long time, which does not reduce the pulsation. Check the pressure of nitrogen, supplement or replace the skin bag. Noise is caused by too much vibration. Without vibration, it will be eliminated.
02. The oil cylinder is not working normally and can only go out but can't go back. What's the problem?
Summary: check whether the other end of the oil cylinder is discharging oil, whether the solenoid valve is reversing, and whether the internal leakage of the oil cylinder is particularly serious. Check whether the oil return pipeline is blocked by foreign matters.
03. What's the matter with high starting pressure of oil cylinder? What's the harm? How to solve it?
The high starting pressure of oil cylinder is related to the manufacturing quality of oil cylinder (such as the bending of piston rod, cylinder barrel, etc.), the form of sealing and installation, etc. For servo cylinder, high starting pressure will affect its dynamic characteristics. For ordinary oil cylinder, the requirement of starting pressure is not as strict as that of servo oil cylinder, but it can not be too high. Once it is found that the starting pressure is high, it is necessary to carefully retest the dimensions of the parts of the oil cylinder and check the installation quality of the seal.
Conclusion: 1. Too much internal resistance. 2. There is a mechanical fault in the external executive part.
The starting pressure of the oil cylinder is related to the design structure of the oil cylinder. The force area of the oil port in contact with the piston, such as the size of the oil port, is the force area of the initial start of the piston. The starting pressure is high, and the starting pressure of the machining force area cavity (starting pressure cavity) between the oil port and the piston is very small.
04. What are the good suggestions for synchronization of hydraulic system cylinder?
Conclusion: it is cheaper to add one-way throttle valve on branch pipeline. If the requirement is relatively high, a diverter throttle valve is added, which has high cost but good effect.
05. The maintenance rate of hydraulic system is particularly high. What are the main reasons?
The main reason is that the environment is bad, the hydraulic system is a more sophisticated equipment, usually more attention should be paid to maintenance, the oil quality is good, the oil should be filtered, and the system seal is good. To improve all kinds of testing equipment, professional personnel are required to record and maintain the working conditions of the system.
06. What should be done if the hydraulic cylinder acts irregularly?
1. It may be that the hydraulic pipeline is mixed with air, so it is necessary to find out the parts mixed with air, clean and check them, reinstall and replace the components and accessories.
2. The oil cylinder is seriously worn and needs to be repaired or replaced.
3. The reversing of solenoid valve is irregular, and the electric furnace needs to be checked
4. The amplifier of electro-hydraulic servo and proportional valve is out of order or improperly adjusted.
When the first one fails, the second one starts to work. What kind of devices are used to connect the two hydraulic stations? If everything else has been designed, the connection between the two hydraulic stations will not be realized
It takes time for the oil pump to start. During the period from the failure of the first hydraulic station to the start of the second hydraulic station to output normal pressure, it is necessary to maintain its pressure
Summary: through the pressure relay, the pressure signal can be converted into electrical signal and sent to the standby pump.