Addtime： 2020-07-18 Browse times： 2966
During the process of using the vacuum pump, did the partners suddenly feel that the motor temperature is very high. At this time, we need to check one by one to eliminate and see where the problem is.
1、 Reasons for high motor temperature:
1. The motor has high power, high working current and high heat output.
2. Fan speed is low, air pressure, air volume is small.
3. The number of fan blades is less and the air volume is small.
4. Motor with dust, oil, reduce the heat dissipation capacity.
5. The voltage of the bus where the vacuum pump motor is located is 380V. Due to the cable voltage drop and uneven load distribution, the actual voltage applied by the motor is only 365v. The low voltage results in large operating current.
2、 Measures to solve high temperature of motor
The motor power and speed are matched with SK vacuum pump and cannot be changed. The fan is installed on the main shaft of the motor. The speed of the motor determines the speed of the fan and cannot be replaced. Although increasing the number of fan blades can play a certain role, but the dynamic balance is not easy to find after the number of blades is increased. If the alignment is not good, the motor vibration will increase.
1. The original fan cover was lengthened by 40cm, and an axial flow fan with the same diameter as the fan cover was installed. The motor power of the axial fan was 850W, the speed was 1489r / min, and the voltage was 380V. The original fan remains. The axial flow fan is equipped with another power supply control, and the axial flow fan is not interlocked with the main motor. After the vacuum pump is started, the axial flow fan is started in time, and the axial flow fan is stopped 30 minutes after the vacuum pump is shut down, so that the main motor can be fully cooled.
2. Regularly remove the dust on the motor, keep the heat sink clean and increase its heat dissipation capacity.
3. Adjust the bus voltage of vacuum pump to 400V.
4. After voltage adjustment, the operating current of the vacuum pump is reduced to 210a, and the calorific value is relatively reduced.
5. The insulation aging speed of the main motor is slowed down and its service life is prolonged.
In use, there are many unexpected places, we can refer to the instructions here to adjust our vacuum pump, after use, don't forget to regularly maintain the vacuum pump.
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