01.The hydraulic system has been unused for a long time. After starting this time, the vibration was particularly severe and the noise was loud. I don't know what the reason is?

Summary: It may be due to long-term storage and nitrogen leakage from the accumulator, which did not reduce pulsation. Check the pressure of nitrogen, supplement or replace the leather bag. Noise is generated due to excessive vibration, and without it, it will be eliminated.

02.The oil cylinder is not working properly and can only come out but cannot return. What is the problem?

Summary: Check if the other end of the cylinder is leaking oil, if the solenoid valve is reversing, and if the internal leakage in the cylinder is particularly severe. Is the return oil pipeline blocked by foreign objects.

03.What is the reason for the high starting pressure of the oil cylinder? What are the hazards? How to solve it?

The high starting pressure of the oil cylinder is related to factors such as the manufacturing quality of the oil cylinder (such as bent piston rod, bent cylinder barrel, etc.), the form of sealing, and installation. For servo cylinders, high starting pressure will affect their dynamic characteristics. For ordinary oil cylinders, the starting pressure requirement is not as strict as that of servo oil cylinders, but it cannot 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.

Summary: 1. Excessive internal resistance. 2. There is a mechanical malfunction in the external execution part.

The starting pressure of the oil cylinder is related to the design structure of the oil cylinder. The contact force area between the oil port and the piston, such as the size of the oil port, is the initial starting force area of the piston. The starting pressure is high, and the starting pressure of the processing force area cavity (starting pressure cavity) between the oil port and the piston contact is very small.

04.What are some good suggestions for synchronizing hydraulic system cylinders?

Summary: Adding a one-way throttle valve on the branch pipeline is relatively inexpensive. If the requirements are relatively high, add a diversion throttle valve, which is expensive but effective.

05.What is the main reason for the particularly high maintenance rate of hydraulic systems?

The main reason is that the environment is harsh, and the hydraulic system is a relatively precise equipment. It is necessary to pay more attention to maintenance, ensure good oil quality, filter when refueling, and ensure good system sealing. Various types of testing equipment need to be improved, and professional personnel are required to record and maintain the working status of the system.

06.What should I do if the hydraulic cylinder moves irregularly?

Summary:

1. It may be that the hydraulic pipeline is mixed with air, and it is necessary to identify the area where the air is mixed, then clean, inspect, reinstall, and replace the components.

2. There are also cases where the oil cylinder is severely worn and needs to be repaired or replaced.

3. The reversing of the solenoid valve is irregular, and it is necessary to check the electric furnace part

4. The amplifier of the electro-hydraulic servo and proportional valve is malfunctioning or improperly adjusted.

One moves and the other does not. When the first one malfunctions, the second one starts working. May I ask which device is better to connect between the two hydraulic stations? If everything else is designed, it is only a matter of achieving the connection between the two hydraulic stations

The start of the oil pump takes time, and the pressure needs to be maintained between the first hydraulic station malfunction and the second hydraulic station starting to output normal pressure.

Summary: By using a pressure relay, the pressure signal can be converted into an electrical signal and transmitted to the backup pump.