Experts analyze 6 major faults of heavy duty hydraulic cylinder

01 The hydraulic system has been useless for a long time. After this time, the vibration and noise were very severe. I don't know why?

It may be placed for a long time, and the accumulator nitrogen leaks, which does not play a role in reducing pulsation. Check the nitrogen pressure, refill or replace the bladder. The noise is caused by too much vibration, and without the vibration, it will be eliminated.

02 The heavy duty hydraulic cylinder is not working properly, it can only go out and can't go back, what is the problem?

Check whether the other end of the heavy duty hydraulic cylinder has oil, whether the solenoid valve is reversed, and whether the leakage of the cylinder is particularly serious. Whether the oil return line is blocked by foreign objects.

03What's the matter with the high starting pressure of the oil cylinder? What is the harm? How to solve it?

The high starting pressure of the heavy duty hydraulic cylinder is related to the manufacturing quality of the oil cylinder (such as the bending of the piston rod, the bending of the cylinder barrel, etc.), the form of the seal and the installation and other factors. For servo cylinders, high starting pressure can affect the dynamic characteristics. For ordinary oil cylinders, the requirements for starting pressure are not as strict as those of servo oil cylinders, but they cannot be too high. Once the starting pressure is found to be high, it is necessary to carefully re-measure the dimensions of the cylinder parts and check the installation quality of the seal.

Summary: 1. The internal resistance is too large. 2. There is a mechanical failure in the external execution 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 force area between the oil port and the piston The starting pressure of the chamber (starting pressure chamber) is very small.

04What are the good suggestions for hydraulic system cylinders requiring synchronization?

Adding a one-way throttle valve to the branch pipeline is cheaper. If the requirements are relatively high, a diverter throttle valve should be added, which is expensive, but the effect is better.

05The maintenance rate of the hydraulic system is particularly high, what is the main reason?

The main reason is that the environment is harsh. The hydraulic system is a relatively sophisticated equipment. Usually, more attention should be paid to maintenance. Various types of testing equipment should be perfected, and professional personnel are required to record and maintain the working conditions of the system.

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

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

2. There is also serious wear and tear of the heavy duty hydraulic cylinder, which needs to be repaired or replaced.

3. The commutation of the solenoid valve is irregular, and the electric furnace part needs to be checked

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

One moves and the other does not move. When the first one fails, the second one starts to work. May I ask what device is used to connect the two hydraulic stations better. If the others are designed, it is only between the two hydraulic stations. implementation of the connection

It takes time to start the oil pump. During the period between the failure of the first hydraulic station and 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 an electrical signal and transmitted to the standby pump.