After using the rotary vane vacuum pump for a certain period of time, due to lack of maintenance, there is a fumes at the exhaust port. Many guests do not know the reason. Here, I have been working with you for many years and I hope to be able to You are helpful.
The Leybold SV300 vacuum pump has an exhaust filter (also called oil mist separator/exhaust filter cotton core). It is a consumable-type accessory that acts as a separate oil and gas pump in the vacuum pump to prevent vacuum pump oil from accompanying. The exhaust gas is discharged from the pump body of the vacuum pump, and the filtered vacuum pump oil is precipitated and returned to the fuel tank. When the exhaust filter fails, the exhaust filter does not filter, and the vacuum pump oil is discharged along with the exhaust gas. There is white or blue fumes at the exhaust port.
What is the problem with the oil from the Laibao SV300 vacuum pump exhaust? There is a root return pipe at the exhaust port of the Leybold SV300 vacuum pump. The function of the return pipe is to return the vacuum pump oil from the exhaust filter to the pump body of the vacuum pump. When the pump is unobstructed, the vacuum pump oil can be well returned to the vacuum pump. Body, when the vacuum pump oil emulsifies, sludge is generated, the sludge will block the return pipe, the vacuum pump oil after the blockage can not be returned to the vacuum pump tank, accumulate at the exhaust port, more than a certain liquid level will be discharged with the exhaust gas .
To solve the above two problems, we must comply with the following points during normal maintenance:
1. Regularly replace the vacuum pump oil. According to different working conditions, the replacement time is different. There is no fixed time. Every time you change the vacuum pump oil, you must discharge all the vacuum pump oil. Absolutely eliminate the vacuum pump oil and add it at will. Clean up the fuel tank.
2. Regularly replace the vacuum pump exhaust filter (oil mist separator / exhaust filter cotton core), and must be replaced when there is oil smoke at the exhaust port.
Analysis of the causes of vacuum pump failure
malfunction | possible reason | Overhaul |
Found oil in vacuum pipes or in pumped containers | Oil comes from the vacuum system | Check vacuum system |
Anti-return valve failure | Cleaning or repairing the anti-return valve | |
The sealing surface of the anti-return valve is worn or dirty | Cleaning or repairing the air inlet and anti-return valve | |
High oil level | Let go of excess pump oil | |
Pump oil turbid, emulsified | Condensable gas condensation | Degas or oil the oil and flush the pump chamber; prevent: open the gas ballast valve |
Pump noise is too loud | The oil level is too low (the oil is no longer visible in the observation window) | Come on |
Silencer hole is blocked | Cleaning or replacing the muffler components | |
Inlet pressure is too high | Reduce inlet pressure | |
Internal oil mist filter is blocked | Clean or replace the oil mist filter | |
Elastic coupling wear | Replace a new flexible coupling | |
Blade or bearing damage | Maintenance pump |
1, the possible cause of the failure to repair the oil in the vacuum pipe or in the pumping container from the vacuum system to check the vacuum system
2, anti-return valve failure cleaning or repair anti-return valve anti-return valve sealing surface wear or too dirty cleaning or repair air intake and anti-return valve
3, the oil level is too high, the excess pump oil is turbid, the emulsified condensable gas is condensed, the oil is degassed or the oil is changed and the pump chamber is flushed; prevention: opening the gas ball valve
4, the pump noise is too high, the oil level is too low (the oil is not visible in the observation window). The fueling silencer hole is blocked to clean or replace the sound-absorbing hole parts.
5, the inlet pressure is too high to reduce the inlet pressure. The internal oil mist filter is blocked to clean or replace the oil mist filter.
6. Elastic coupling wear replaces a new elastic coupling blade or bearing damage maintenance pump
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