Common faults of hydraulic transmission system
In the actual operation of the hydraulic transmission system of construction machinery, the common fault problems are as follows:
1. The movement mechanism based on hydraulic power is unstable or does not move, which seriously affects the normal operation of construction machinery.

2. The hydraulic transmission system is weak. The main performance of the fault problem is that the actuator cannot bear the external load and does not move.

3. The hydraulic transmission system temperature is too high. At this time, the oil will be diluted or deteriorated, which will not only reduce the efficiency of operation, but also cause the deformation and damage of components.

4. Leakage of hydraulic transmission system. Under this fault, not only the waste of resources will be caused, but also the normal operation of construction machinery will be affected. If the system temperature is too high, the leakage of oil will be aggravated.

5. Blockage. When components are damaged or cannot move to the specified position, the hydraulic transmission system of construction machinery will fail.

6. Noise. If the hydraulic transmission system of construction machinery operates with large noise, it is extremely easy to cause system vibration and reduce the operation stability.

Fault causes of hydraulic transmission system
1. Reasons for system design
The failure of hydraulic transmission system is directly related to the design of the system.
When the structural design of the oil tank in the hydraulic transmission system of construction machinery is not reasonable enough, the oil will be contaminated, which will directly affect the operation of the hydraulic transmission system of construction machinery. For example, if the tightness of the oil tank is insufficient and the connecting pipe and joint are not sealed, it is very easy to cause foreign matters to enter the oil tank.

When the contaminated oil enters the hydraulic transmission system of construction machinery for operation, it will make the blocking, wear, corrosion and other problems of components more serious. In the hydraulic transmission system of construction machinery, piston rod is an important structural element.

Since construction machinery has been operating in a relatively harsh environment for a long time, it is extremely easy to have foreign matters entering the piston rod or affecting the operation of the piston rod.

At this time, if the design of hydraulic transmission system of construction machinery does not add a protective sleeve at the position of piston rod in combination with the actual situation, it will aggravate the wear and corrosion of piston rod and hydraulic cylinder components, leading to the failure of hydraulic transmission system of construction machinery.

Reasons for system maintenance
After the construction machinery is used for a period of time, the relevant staff will maintain the construction machinery fluid according to the actual use situation, and replace the parts with wear, corrosion, damage and other problems.

In this case, if there are certain problems in the maintenance of hydraulic transmission system, such as the unqualified quality of replaced parts, it will also lead to the failure of hydraulic transmission system of construction machinery.

For the hydraulic transmission system of construction machinery, the fine filter is an important structure, which requires key maintenance by relevant staff. When the original fine filter is worn, the relevant staff will replace it.

However, if the quality of the replaced fine filter is not strictly controlled, or there are cracks and micropores on the filter paper, the micropores will be blocked and the filtering function will not be realized, and the hydraulic transmission system of construction machinery will also have new failures.

During the maintenance of the hydraulic transmission system, the operation of the relevant staff is not rigorous, which will also lead to the occurrence of faults. For example, when the components are cleaned and the system is flushed, certain pollutants will remain in the hydraulic transmission system, leading to the occurrence of faults.

3. Reasons for system use
Improper operation of relevant staff is also an important reason for the failure of hydraulic transmission system of construction machinery. If the staff do not understand the operating principle of the hydraulic transmission system and do not follow the specifications in the actual operation, it is very easy to cause the hydraulic transmission system failure.

Preventive measures for hydraulic transmission system failure
1. Prevent air from entering the hydraulic oil.
In the operation of the hydraulic transmission system, because the air can be compressed, even if the hydraulic transmission system contains a small amount of air, it will have a negative impact on the operation of the system. When there is air in the hydraulic oil, it will cause the system noise, local heating and other problems, and make the hydraulic transmission system of construction machinery malfunction.

Based on this situation, relevant staff should try their best to avoid air entering the hydraulic oil and ensure the integrity of seals, so as to reduce the probability of hydraulic transmission system failure.

2. Ensure the cleanliness of hydraulic oil.
Once there are impurities in the hydraulic oil, it will lead to blockage and other problems, reducing the safety of the hydraulic transmission system of construction machinery. Therefore, relevant staff should focus on and maintain the cleanliness of hydraulic oil.

The failure of hydraulic transmission system is mainly caused by design, maintenance and use. By avoiding air entering the hydraulic oil and ensuring the cleanliness of the hydraulic oil, the failure of the hydraulic transmission system of construction machinery can be prevented.

Source: new hydraulic pressure

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