Dubinska analiza tipova kvarova hidrauličkog sustava i precizne strategije rješenja

1. Fault and treatment of high hydraulic oil temperature

High hydraulic oil temperature will cause a series of problems, seriously affecting the normal operation of the machine. The increase in oil temperature will cause the viscosity of the hydraulic oil to decrease, the working efficiency of the system to decrease, and the friction resistance to increase, which may cause the hydraulic valve to get stuck, and the sealing material to deteriorate, causing the hydraulic system to leak.

(I) Poor heat dissipation performance of the oil tank

If the heat dissipation performance of the oil tank is poor, the oil temperature in the tank is easy to rise. To solve this problem, you can replace the oil tank with a larger volume to enhance the heat dissipation capacity of the oil, or install a cooling device to ensure that the oil temperature is maintained within a reasonable range.

(II) Improper selection of hydraulic oil

If the quality of the selected hydraulic oil does not meet the standard, or the operator mixes different types of hydraulic oil, it will cause the viscosity of the oil to increase abnormally. Therefore, when selecting hydraulic oil, it is necessary to fully consider the serious consequences of using non-compliant oil, and strictly select and use hydraulic oil in accordance with the specifications.

(III) Harsh construction environment

In harsh construction sites, as the machine runs for a long time, impurities and pollutants are easily mixed into the hydraulic oil. Contaminated hydraulic oil entering the gap between the pump and the motor will damage the surface smoothness, cause leakage and increase the oil temperature. To fundamentally solve this problem, it is necessary to purify the construction environment and reduce the impact of pollutants on the hydraulic oil.

2. Hydraulic system air inlet failure and solution

Air entering the hydraulic oil of the excavator will cause cavitation and cavitation, damage the metal sealing material, generate noise, and reduce the stability of the hydraulic system.

(I) Joint sealing problem

The joint is not firmly fixed and the seal fails, which is a common reason for air to enter the hydraulic system. The hydraulic system must ensure good sealing, especially key parts such as interfaces. It is necessary to ensure that the joints are firmly fixed and the oil tank is well sealed to prevent air intrusion.

(II) Damaged pipelines

If the oil suction pipeline and connecting pipeline of the hydraulic system are damaged by wear or corrosion, air will enter. This is often due to unreasonable pipeline layout design, which does not meet the specifications and actual needs. To solve this problem, it is necessary to clean and maintain the pipeline regularly to reduce the corrosion of the pipeline by external factors and prevent air from entering.

(III) Improper refueling operation

During the refueling process, if the operation is not standardized, bubbles will be brought into the oil tank and mixed into the system in a hurry, which will also cause air to enter the hydraulic system. Therefore, the operator should maintain a stable working state when refueling to avoid such situations and ensure the safe and stable operation of the hydraulic system.

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