The reason is the breakdown on the gear pump oil and oil (three)       

The hydraulic oil pump will produce overflow breakdown and skeleton oil seal oil seal oil series. Gear pump on oil will seriously affect the normal operation of the machine. The reason, there are the following four aspects: Xiao Bian today introduced third and fourth aspects.

3. The influence of cleanliness of hydraulic system

The hydraulic system consists of the fuel tank, gear pump, pipeline control valve, hydraulic cylinder and other important components. When the hydraulic system works, the hydraulic system is polluted because of the casting of the inner oil passage of the control valves, the sticking of the sand on the inner wall and the falling off of the pressure oil and other factors. At the same time, the oil tank and pipeline welding slag, hydraulic cylinder internal burr, burr and other factors are also caused by the hydraulic system pollution. After the hydraulic system is polluted, the friction between the gear pump friction pairs is increased, and the seal failure is caused, which leads to the breakdown of the oil seal of the gear pump and the connection of oil. Therefore, the valve body cleaning, oil tank and hydraulic auxiliary parts processing and hydraulic cylinder cleaning should be carried out carefully to ensure the cleanliness of the hydraulic system.

4, the influence of hydraulic oil

(1) cleanliness of hydraulic oil, pollution particles

The gear shaft and seal gap ring hole is very small, it will cause pollution of particles into the sealing ring hole wear, scratches or rotates along with the shaft, resulting in two times the sealing pressure of oil into the low pressure area (framework oil seal), resulting in the breakdown of oil seal. The hydraulic oil to cleanliness poor filtration or replacement of antiwear hydraulic oil.

(2) viscosity decrease and deterioration of hydraulic oil

Hydraulic oil viscosity decreased, after oil thinning, high pressure in the gear pump under the leakage increased by two times the seal clearance; because not return oil pressure in the region, causing increased breakdown caused on oil seal. Recommended periodic testing of oil, hydraulic oil replacement (L-HM46~68 and GB11119-98)