If the rotary vane vacuum pump in operation is not operated properly, faults will often occur, such as vacuum drop, smoke, oil injection, oil leakage at oil seal, noise, and emulsification of vacuum pump oil in the pump. In case of such a situation, first of all, there is no need to panic, and after the shutdown, according to the troubleshooting one by one. The following is the troubleshooting method of rotary vane vacuum pump, I hope it is useful for you!

1、 Rotary vane vacuum pump smoke and fuel injection: refers to rotary vane vacuum pump in operation, exhaust port smoke or fuel injection.

1. Smoke, if the pump just started to run, smoke phenomenon, belongs to normal, if long time in smoke is abnormal. Solution: smoke indicates that the air inlet of the pump, including pipes, valves and containers, has been repaired. After leak detection, the smoke will end.

2. Fuel injection indicates that there are a lot of leakage points outside the intake port, even the air inlet is exposed to the atmosphere. Solution: seal the air inlet of the pump to make the pump run. If there is no oil injection, it indicates that there is a leakage point; if the exhaust valve plate is damaged, check whether the exhaust valve plate is damaged, and replace the damaged exhaust valve plate.

2、 Rotary vane vacuum pump noise: here refers to the noise of the pump.

1. Knock the cylinder, pump operation when issued irregular sound, like metal knock metal sound. This is the sound of the rotating plate hitting the pump body. This kind of situation is mainly caused by the spring break or contraction or pop-up failure between the pairs of rotating blades. Solution: open the pump and check whether the vane spring is damaged. Replace the spring.

2. Exhaust valve noise, mainly due to pump exhaust valve plate damage. Solution: replace the exhaust valve piece.

3、 Vacuum drop of rotary vane vacuum pump: it refers to that the vacuum degree of rotary vane vacuum pump measured at present is lower than the factory index or the vacuum degree when used before. There are many reasons for low vacuum. Here are several main situations.

1. The brand of rotary vane vacuum pump oil added this time is different from the original one. Different brands of vacuum pump oil, due to different brands of oil saturated vapor pressure is not the same, so the results are not the same. Solution: according to the model and specification of the product, replace the correct new vacuum pump oil.

2. In addition, it is also due to the vacuum pump oil caused by low vacuum, that is, the vacuum pump oil emulsion discoloration, or too dirty. Solution: drain all the vacuum pump oil in the pump, replace the same type of vacuum pump oil, and solve the problem that water vapor and impurities do not enter the pump.

3. The temperature of the extracted gas may be too high. Solution: reduce the temperature of the extracted gas, or add a corresponding heat exchanger.

4. The oil way in the pump is blocked or not smooth, and there is not a certain amount of oil in the pump cavity. Solution: check whether the oil circuit is smooth, and add the same type of vacuum pump oil.

5. The clearance of fit is increased. This is due to the dust in the aspirated body for a long time, which causes the gap between the vane vacuum pump and the stator to increase after wear. Solution: check whether the clearance is too large and replace with new parts.