Factors affecting hydraulic system leakage of valve test bench:

Bad working conditions will have a certain impact on the sealing of the valve test bed. Once the hydraulic system leakage, will cause the system pressure can not be established, hydraulic oil leakage will also cause environmental pollution, affect production and even produce unpredictable serious consequences. The following for some factors affecting the valve test bench hydraulic system leakage to simply discuss the causes of leakage and countermeasures.

Ii. Classification of leakage

There are two main types of leakage in the hydraulic system of the valve test bed: the leakage at the fixed seal and the leakage at the sports seal. The leakage at the fixed seal mainly includes the cylinder bottom and the connection of various pipe joints. The leakage of oil can be divided into external leakage and internal leakage. External leakage mainly refers to the leakage of hydraulic oil from the system to the environment. Internal leakage refers to the flow of hydraulic oil from the high pressure side to the low pressure side in the system due to the existence of pressure difference on the high and low pressure side and the failure of seals and other reasons.

Iii. Causes affecting leakage:

(1) selection of seals

The reliability of hydraulic system, hydraulic system depends largely on the design of the seal and seal selection, due to the unreasonable design of seal structure selection, the selection of seal does not accord with standard, without considering the hydraulic oil in the design and the compatible type of sealing material, load, extreme pressure, velocity, the change of environmental temperature, etc. These are in varying degrees of direct or indirect causes of hydraulic system leakage. In addition, due to the use of dust and impurities in the environment of the valve test bed, so in the design should choose the appropriate dustproof seal, avoid dust and other dirt into the system to destroy the seal, pollution of oil, thus causing leakage.

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