Failure to replace the hydraulic oil for a long time will seriously damage the service life of the hydraulic pump

1. What effect does the hydraulic oil have on the hydraulic pump if it is not changed for a long time?

If the hydraulic oil is used for a long time and is not replaced, the impurities (iron filings, copper filings, dust, etc.) in the hydraulic oil will accumulate more and more, and the fine particle size will become smaller and smaller. Such impurities are very small and sometimes used It is invisible to the naked eye, so it is easy to enter the hydraulic oil hydraulic pump through the hydraulic oil filter element, and bring it to various working devices and control components through the working cycle, which directly leads to the rapid wear of the hydraulic components of the entire hydraulic oil hydraulic pump system.

2. What effect does the high temperature have on the efficiency if the hydraulic oil is not changed for a long time?

When the structure and manufacturing are determined, the temperature rises, the viscosity of the oil decreases, the leakage of the plunger hydraulic pump increases, and the volumetric efficiency decreases, resulting in a decline in the performance of the plunger hydraulic pump. If the temperature is too high, it will cause excessive leakage, which may cause the hydraulic system to be depressurized and not work properly.

The viscosity of the hydraulic oil decreases with the increase of temperature, the mechanical loss of the components rotating with the cylinder block in the hydraulic oil under the working condition of the plunger hydraulic pump decreases, and the pressure loss and internal friction of the oil flowing through the suction oil window are reduced accordingly. Therefore, the mechanical efficiency of the plunger hydraulic pump is improved, and the total efficiency of the hydraulic pump is equal to the product of its mechanical efficiency and volumetric efficiency. Therefore, when the oil temperature can ensure the establishment of an oil film, the mechanical efficiency of the hydraulic pump can compensate for a part of the volumetric efficiency and reduce the oil The effect of temperature on the overall efficiency of hydraulic pumps.

3. What are the consequences of not changing the hydraulic oil for a long time?

If the hydraulic oil is not changed for a long time, the impurities will increase. If the hydraulic pump runs in this condition for a long time, it will seriously shorten the working life of the hydraulic pump and the oil circuit, the solenoid valve, and the execution cylinder, resulting in the unstable operation of the hydraulic pump system and the hydraulic pressure. The pump body seal fails and oil leaks occur. And as the working time increases, the hydraulic oil may have the fatal shortcoming of air bubbles, which will cause abnormal noises in the oil hydraulic pump and hydraulic pump, which will seriously lose pressure and greatly shorten the service life of the hydraulic pump.

Knowing that the hydraulic oil will have such a serious impact on the hydraulic oil hydraulic pump, when is it economical to change the hydraulic oil and guarantee the service life of the hydraulic pump? If the hydraulic oil expires and the oil hydraulic pump is contaminated, how should the hydraulic equipment be cleaned?