Cleaning of residual impurities in vacuum oil filling equipment pump is needed.

The oil exchange method is as follows: remove the pump from the system, connect it with a clean square plate under the oil discharge hole, unscrew the oil injection plug and the oil discharge plug, release the dirty oil, start the motor 4-6 times intermittently, so that all the oil in the vacuum chamber is discharged. Then clean vacuum pump oil 200 ~ 300CC is added from each suction pipe to start the motor intermittently and clean the vacuum chambers again. In this way, after 2 to 3 times of repeated cleaning, light cleaning oil, rotate the oil plug, add clean vacuum pump oil from the oil plug to the center of the window hole position, tighten the oil plug does not leak. Oil change is best after the oil temperature rises. Kerosene, gasoline, alcohol and other non-disassembly cleaning of the pump is strictly prohibited; at ordinary times, attention should be paid to protecting the inlet, check the filter screen, prevent dust and impurities into the pump, pollute the pump oil, damage the vacuum chamber.

The replacement of vacuum pump oil is not simply to discharge the vacuum pump oil and then inject new pump oil can be, vacuum oil injection equipment in the replacement of pump oil also need to pay attention to the cleaning of residual impurities inside the pump. After 3~4 months of continuous use, the vacuum pump oil should be replaced. When used in a humid environment, this refers to the humidity in the pumped container. For example, when the external humidity is very high, the air is often exposed to resume pumping, which means that the humidity is relatively high. If the outside humidity is relatively high, the mechanical pump has been pumping a vacuum equipment, then pumping for a long time does not need to replace the pump oil. Therefore, when the humidity is relatively large, the oil change period should be shortened as appropriate. The oil can be cleaned and dewetted and reused.

In the vacuum drying and impregnating process of electric power equipment, the vacuum range is mostly between 1 105Pa (atmospheric pressure) and 1 Pa. The measuring range of the measuring instrument should exceed this value in order to accurately measure the vacuum in the process. Generally speaking, the highest vacuum degree of the measuring instrument should be 1-2 orders of magnitude higher than the highest vacuum degree of the system under test. Therefore, we choose the vacuum timing and require the highest vacuum degree measured by the vacuum meter to be about 1 *10-2 Pa. The cost and cost of measuring instruments would be substantially increased if the requirements were higher, and it would not make practical sense for the vacuum systems we use today. At present, the Macraw vacuum gauge and the heat conduction vacuum gauge are widely used in the industry. With the development of measurement technology, capacitive thin film vacuum gauge (CMV) has been gradually introduced into the manufacturing process of power equipment for its advantages of good anti-pollution, stability, easy cleaning and automation.