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简单化解真空泵三大常见故障Simply resolve the three common faults of vacuum pumps

东西使用久了,难免会损坏,真空泵被大规模的使用到很多工业领域,那真空泵坏了要怎么办呢?真空泵维修方法有哪些?


接下来小编给大家讲解一下真空泵三大常见故障。

问题一:漏油问题

问题解决:旋片式机械真空泵常见的故障之一,主要发生在真空泵的油窗、油箱密封垫、电机轴承轴封三个位置上,其主要原因是真空泵使用时间过长而引起这些部位老化,密封失效,从而导致漏油。解决办法:更换老化的油窗、轴封、密封垫和已吸满泵油的毛毡垫,维修完成后,注油前应用爱德华真空泵泵油冲洗真空泵,并用溶剂清洗注油口处的滤网,以保持油箱的清洁
问题二:真空泵不能启动:主要表现为真空泵加电后不能启动运转。
问题解决:这时应首先检查真空泵的电路部分,如保险管是否烧毁、电路部分有没有元气件烧坏。在排除电路部分的故障后,应考虑以下两个因素:
1、电机烧坏:主要为电机定子线圈烧毁,引起原因较多,如瞬间电流过大,电机轴承使用久了被磨损,致使轴承摩擦阻力变大,电机功率加大,引起温度上升,烧毁电机。这时应先检查电机轴承,再检查电机线圈。轴承损坏就更换轴承;电机线圈烧毁则应维修电机,重新绕制定子线圈。轴承和线圈损坏严重时,就需更换电机了。
2、旋片卡阻:主要表现为旋片与泵腔内表面的摩擦阻力过大,致使电机无法带动旋片。原因是旋片变形,转子内的弹簧张开后不能复位,或弹簧压力和旋片自身离心力的合力过大,导致旋片与泵腔内表面的摩擦阻力过大。这时就应及时修复旋片和弹簧,若不能修复则应更换。
问题三、抽不到真空泵的极限真空度。
问题解决:首先检查真空系统的气密性,看是否有轻微漏气。其次应打开气镇,让泵运行30分钟左右,来抽干非泵油污染引起的可压缩蒸汽,排除可压缩蒸汽对极限真空度的影响。
在排除以上两个因素后,其他原因主要有:泵油污染,需要换油;泵内油过滤器堵塞,引起压缩注油系统油路不畅,供油不足,导致泵体密封不严,这时需要清洗内部油过滤器;配油器阀门变形、磨损或损坏也可导致供油不足,这时应检查更换配油器阀门;

长时间使用引起真空泵的旋片磨损或转子内的弹簧张力不足,,导致吸气室和排气室隔离不严,从而引起真空泵的抽真空性能下降,这时应当更换旋片和弹簧,并清洗转子和泵腔;检查排气阀门,观看其动作是否失灵,导致排气不畅,必要时应更换排气阀门。


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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