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簡單化解真空泵三大常見故障Simply resolve the three common faults of vacuum pumps

東西使用久了,難免會損壞,真空泵被大規模的使用到很多工業領域,那真空泵壞了要怎么辦呢?真空泵維修方法有哪些?


接下來小編給大家講解一下真空泵三大常見故障。

問題一:漏油問題

問題解決:旋片式機械真空泵常見的故障之一,主要發生在真空泵的油窗、油箱密封墊、電機軸承軸封三個位置上,其主要原因是真空泵使用時間過長而引起這些部位老化,密封失效,從而導致漏油。解決辦法:更換老化的油窗、軸封、密封墊和已吸滿泵油的毛氈墊,維修完成后,注油前應用愛德華真空泵泵油沖洗真空泵,并用溶劑清洗注油口處的濾網,以保持油箱的清潔
問題二:真空泵不能啟動:主要表現為真空泵加電后不能啟動運轉。
問題解決:這時應首先檢查真空泵的電路部分,如保險管是否燒毀、電路部分有沒有元氣件燒壞。在排除電路部分的故障后,應考慮以下兩個因素:
1、電機燒壞:主要為電機定子線圈燒毀,引起原因較多,如瞬間電流過大,電機軸承使用久了被磨損,致使軸承摩擦阻力變大,電機功率加大,引起溫度上升,燒毀電機。這時應先檢查電機軸承,再檢查電機線圈。軸承損壞就更換軸承;電機線圈燒毀則應維修電機,重新繞制定子線圈。軸承和線圈損壞嚴重時,就需更換電機了。
2、旋片卡阻:主要表現為旋片與泵腔內表面的摩擦阻力過大,致使電機無法帶動旋片。原因是旋片變形,轉子內的彈簧張開后不能復位,或彈簧壓力和旋片自身離心力的合力過大,導致旋片與泵腔內表面的摩擦阻力過大。這時就應及時修復旋片和彈簧,若不能修復則應更換。
問題三、抽不到真空泵的極限真空度。
問題解決:首先檢查真空系統的氣密性,看是否有輕微漏氣。其次應打開氣鎮,讓泵運行30分鐘左右,來抽干非泵油污染引起的可壓縮蒸汽,排除可壓縮蒸汽對極限真空度的影響。
在排除以上兩個因素后,其他原因主要有:泵油污染,需要換油;泵內油過濾器堵塞,引起壓縮注油系統油路不暢,供油不足,導致泵體密封不嚴,這時需要清洗內部油過濾器;配油器閥門變形、磨損或損壞也可導致供油不足,這時應檢查更換配油器閥門;

長時間使用引起真空泵的旋片磨損或轉子內的彈簧張力不足,,導致吸氣室和排氣室隔離不嚴,從而引起真空泵的抽真空性能下降,這時應當更換旋片和彈簧,并清洗轉子和泵腔;檢查排氣閥門,觀看其動作是否失靈,導致排氣不暢,必要時應更換排氣閥門。


Things will inevitably be damaged if they are used for a long time. Vacuum pumps are widely used in many industrial fields. 

What should I do if the vacuum pump is broken? 

What are the maintenance methods for vacuum pumps?

Next, the editor will explain the three common faults of vacuum pumps.

Problem one: oil leakage problem

Problem solving: One of the common failures of rotary vane mechanical vacuum pumps mainly occurs in the oil window of the vacuum pump, the oil tank gasket, and the motor bearing shaft seal. The main reason is that the vacuum pump has been used for too long and these parts are aging. The seal fails, causing oil leakage. Solution: Replace the aging oil window, shaft seal, gasket and felt pad that has been filled with pump oil. After the repair is completed, use Edward vacuum pump oil to flush the vacuum pump before oil filling, and clean the filter at the oil filling port with a solvent to maintain Clean the fuel tank

Problem 2: The vacuum pump cannot be started: The main manifestation is that the vacuum pump cannot be started after powering on.

Problem solving: At this time, first check the circuit part of the vacuum pump, such as whether the fuse is burned out, and whether the vitality parts of the circuit part are burned out. After troubleshooting the circuit part, the following two factors should be considered:

1. Motor burnout: The main cause is the burning of the motor stator coil. There are many causes, such as excessive instantaneous current, and the motor bearing is worn for a long time, which causes the bearing friction resistance to increase, the motor power increases, and the temperature rises and the motor is burned. . At this time, check the motor bearings first, and then check the motor coils. If the bearing is damaged, replace the bearing; if the motor coil is burnt, repair the motor and rewind the sub-coil. When the bearing and coil are severely damaged, the motor needs to be replaced.

2. Rotary vane jamming: The main manifestation is that the frictional resistance between the rotary vane and the inner surface of the pump cavity is too large, causing the motor to fail to drive the rotary vane. The reason is that the rotary vane is deformed, the spring in the rotor cannot be reset after being opened, or the combined force of the spring pressure and the centrifugal force of the rotary vane is too large, resulting in excessive frictional resistance between the rotary vane and the inner surface of the pump cavity. At this time, the rotary vane and spring should be repaired in time, if not repaired, they should be replaced.

Problem three: The ultimate vacuum of the vacuum pump cannot be drawn.

Problem solving: first check the air tightness of the vacuum system to see if there is a slight leak. Secondly, open the gas ballast and let the pump run for about 30 minutes to drain the compressible steam caused by non-pump oil pollution and eliminate the influence of compressible steam on the ultimate vacuum.

After excluding the above two factors, other reasons are mainly: pump oil pollution, oil change is needed; oil filter in the pump is blocked, causing the compression oil injection system oil path to be unsmooth, insufficient oil supply, and the pump body is not tightly sealed. The internal oil filter needs to be cleaned; deformation, wear or damage of the oil distributor valve can also cause insufficient oil supply. At this time, check and replace the oil distributor valve;

Long-term use will cause the rotor blades of the vacuum pump to wear out or the spring tension in the rotor is insufficient, which leads to the lack of isolation between the suction chamber and the exhaust chamber, which causes the vacuum pumping performance of the vacuum pump to decrease. At this time, the rotor blades and springs should be replaced and cleaned. Rotor and pump cavity; check the exhaust valve to see if its action fails, resulting in poor exhaust. Replace the exhaust valve if necessary.




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