A vacuum pump refers to a device or equipment that uses mechanical, physical, chemical, or physical chemical methods to pump air from the pumped container to obtain a vacuum. Generally speaking, it is a device that uses various methods to improve, generate and maintain a vacuum in a certain enclosed space. So do you know the reason for its high temperature and what is the solution? Let’s follow the editor of Wholesale Rotary vane vacuum pump equipment to have a simple understanding!
1. Reasons for the high temperature of the vacuum pump
1. The motor power is too large, causing the working current to become larger, so the thermal power is also large.
2. The fan blades are few and the air volume is small, so the heat dissipation cannot keep up.
3. The fan speed is low, so the air pressure is low and the air volume is small.
4. The voltage of the busbar where the motor of the vacuum pump is located is 380V. Due to the cable voltage drop and uneven distribution, the applied voltage of the motor is lower than 380V. In order to keep the power constant, the current increases and the thermal power increases.
5. The motor is attached with dust, oil and other dirt, which reduces the heat dissipation function.
Second, the cooling method of the vacuum pump
The motor power and speed are matched with the vacuum pump, so it 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, so it cannot be changed. Increasing the number of fan blades can play a certain role, but if the number of blades increases, the original dynamic balance is broken, and it is necessary to find a new dynamic balance point. The new dynamic balance point is not easy to find. If the dynamic balance is not correct, it will cause Severe vibration of the motor. Therefore, the following methods are generally adopted:
1. Lengthen the original fan cover by 40cm, and install an axial fan with the diameter of the fan inside. The motor power requirement of the axial fan is 850w, the speed is 14889r/min, and the voltage is 380v. The original fan is retained. The axial flow fan is controlled by another power source. After the vacuum pump is started, the axial flow fan will run, and the axial flow fan will be stopped 30 minutes after the vacuum pump is shut down to fully cool the main motor.
2. Keep the vacuum pump motor clean and clean, clean the dirt on the motor regularly, and increase the heat dissipation capacity.
3. Increase the bus voltage of the vacuum pump to 400v. The temperature is 80°C or 100°C; if the temperature is between 50-100°C, the WKA series high temperature medium type must be selected, and the higher temperature resistance is 100°C.
The above is the editor of Wholesale Rotary vane vacuum pump equipment introducing the causes and solutions of high temperature. I hope you can learn more.