Rotary vane vacuum pump and fuel injection: refers to the rotary vane type vacuum pump in the operation of exhaust smoke or fuel injection.
1. Smoke, if the pump has just started running a smoking phenomenon, it is normal, if long in the smoke is not normal. Solution: the smoke that the pump inlet estuary, including piping, valves, vessels have repaired the situation. After dealing with the leak, the smoke will end. Vortex Flowmeter
2. Fuel injection, intake estuary shows a large number of leaks, and even exposure to air intake. The solution: shut the pump inlet to the pump running, if not fuel injection, it indicates that there is a leak; exhaust valve film is damaged, check the exhaust valve film is damaged, replace the bad and the exhaust valve sheet.
Rotary vane vacuum pump noise: here refers to the pump noise.
1. Knock on the cylinder, the pump is running out of irregular sound, like metal tapping the sound of metal. This is the sound of the rotating blade in the hit pump body. This situation is mainly caused by the spring break between the paired rotating blades or the failure caused by shrinkage or ejection. Solution: open the pump to check whether the rotating disc spring is damaged or not. Replace spring.
2. Exhaust valve film noise, the main pump exhaust valve is damaged. Solution: replacement of the exhaust valve.
Vacuum drop of rotary vane vacuum pump: refers to the vacuum degree of the vacuum pump which is measured by the current measurement is lower than that of ex factory index or before use. There are many reasons for the low vacuum, and here are some of the main things.
1. This plus the rotary vane vacuum pump oil brand and the original is not the same. Different types of vacuum pump oil, due to different grades of oil saturated vapor pressure is not the same, so the results are not the same. Solution: according to the product model specifications to replace the correct new vacuum pump oil.
2. Is also due to the vacuum pump oil caused by the low degree of vacuum, that is, the vacuum pump oil emulsion discoloration, or too dirty. Solution: put clean pump all the vacuum pump oil, replace the same type of vacuum pump oil, and to solve the pumping gas water vapor and impurities do not enter the pump.
3. The temperature of the gas being pumped may be too high. Solution: to reduce the temperature of the gas being pumped, or to add a corresponding heat exchanger.
4. Pump circuit is blocked or poor, the pump cavity does not maintain a certain amount of oil. Solution: check oil circuit is smooth, and add the same type of vacuum pump oil.
5. With a large gap. This is a long period of pumping gas containing dust and so on, resulting in a gap between the rotating blade and the stator wear increases. Solution: check the gap is too large, the replacement of new parts.
