Addtime： 2020-07-16 Browse times： 6988
Vacuum pump frequently trips in the process of use, first of all, we should understand the cause of the trip, and then solve the vacuum pump trip fault, and then to remove the trip fault. Let's analyze the reasons for the automatic trip of vacuum pump
1. The motor works overload. When the vacuum pump motor is overloaded, the current of the motor will certainly be too high. If the current exceeds the current set by the electric control box or relay protection device, the vacuum pump will trip automatically. At this time, it is a normal phenomenon of the vacuum pump. The upper limit of current protection can be adjusted to solve the problem of tripping. But to consider the size of the motor rated current, so that the actual current exceeds the rated current of the motor, then this method can not be used. At this time, we should quickly find out the cause of motor overload and solve the problem. For example, if the water ring vacuum pump is over current, it is necessary to consider whether there are foreign matters entering the pump cavity, which will lead to overload of the motor, and whether the working fluid flow will be too large, which can be adjusted accordingly. Whether the exhaust pressure is too high, whether the exhaust pipe is blocked, whether it is too high, too thin, etc. The rotary vane vacuum pump has no working fluid, so the above problems can not be considered. However, the rotary vane vacuum pump needs to be refuelled. At this time, it is necessary to consider whether the vacuum pump oil in the pump cavity is emulsified, or there are impurities entering from the air inlet. In addition, the most important thing is to check whether there is leakage in the air intake pipeline, because the rotary vane vacuum pump is suitable for the sealing system, and the motor will trip due to overload when it is used in the atmosphere. If it is roots vacuum pump or vacuum unit, the problem is relatively simple and clear, because we all know that roots vacuum pump is a booster pump and can not be used alone, so it needs to be used together with the front stage pump. If a certain vacuum degree is not reached, the motor of roots pump will overload and trip immediately. The other is the basic problem, such as whether there are impurities, welding slag and small particles in the pipeline of the pumping system into the pump cavity, and then the vacuum pump oil. If the roots water ring vacuum unit does not follow the corresponding start-up and stop sequence or the automatic power-off situation, the working fluid of the water ring pump will return to the roots pump cavity under the influence of negative pressure, which will damage the performance of vacuum pump oil Roots pump overload work, more than the rated current and trip.
2. If the vacuum pump is stopped for a long time, the motor load will lead to temporary high current. Solution of rotary vane vacuum pump: change clean vacuum pump oil, turn off the air inlet and the valve in front of the system to be pumped, and do not connect the system to run for a period of time. Solution of water ring vacuum pump: manual turning can be carried out before starting. If there is no foreign matter, rust remover can be added or 15% oxalic acid can be soaked for about half an hour.
3. The vacuum pump motor is connected to the two-phase power supply. If the three-phase power supply is not enabled, the three-phase power supply of the vacuum pump can be connected. Before starting the machine, you can carefully check the product specification, model, power, voltage, current, etc. Or the relevant professionals to turn on the power supply.
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