Vacuum pump manufacturer: screw vacuum pump high temperature situation how to do
1、Vacuum pump manufacturers: Reasons and solutions for high temperature of vacuum pump
The fan speed is low, the air pressure is low, and the air volume is small. The motor has large power, large working current and large calorific value. The number of fan blades is small and the air volume is small. The bus voltage where the vacuum pump motor is located is 380V. Due to the cable voltage drop and uneven load distribution, the actual application voltage of the motor is only 365v. The low voltage results in a large operating current. The motor contains dust and oil, which reduces the heat dissipation capacity.
Solution: The motor power and speed are matched with the vacuum pump and cannot be replaced. The fan is installed on the motor spindle. The motor speed determines the fan speed and cannot be replaced. Although increasing the number of fan blades can play a certain role, the dynamic balance is not easy to find after the number of blades increases. If the alignment is not good, the motor vibration will increase. Lengthen the original fan cover by 40cm and install an axial fan with the same diameter as the fan cover. Axial fan motor power 850W, speed 1489r/min, voltage 380V. The original fan still exists. 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 should be started in time, and the axial flow fan should be stopped 30min after the vacuum pump is stopped to fully cool the main motor; regularly clean the dust on the motor, keep the motor heat sink clean, and increase the heat dissipation capacity; adjust the voltage of the bus where the vacuum pump is located to 400V.
2、Vacuum pump manufacturersPrinciple of anti-oil return device of vacuum pump
In order to prevent the vacuum pump oil from returning to the pumping container when the pump is stopped, the built-in pump stop and oil return prevention device is very important.
Vacuum pump manufacturer: vacuum pump anti-oil return valve principle: reliable air inlet anti-oil return device, double protection, no oil return, to ensure the safety of the vacuum system.
Protection 1: When the pump stops, the isolation valve closes the vacuum system;
Protection 2: When the pump stops, close the oil circuit and inflate the pump cavity.
Vacuum pump manufacturer: During the operation of the vacuum pump, the control piston is kept sealed under the action of oil pressure and resists the spring. The clack of the anti-suck back valve remains low due to its own weight (valve is open). After the pump stops, the oil pressure drops and the spring pushes the control piston upward. This creates a path between the tank and the backflow preventer piston. The above is the principle of the vacuum pump backflow prevention valve. Compared with the vacuum pump with spring control anti-return valve, the anti-return effect is better, the failure rate is lower, and the maintenance is simpler.
vacuum pump manufacturers:Every time the vacuum device is used, the vacuum device should be cleaned. This is because the unit is prone to fouling after being used for a period of time. Once it is fouled, it will cause trouble to use, which will not only greatly increase the loss, but also increase the risk of some accidents. Therefore, be careful not to increase chemical consumption and pollution load, cause production accidents, reduce equipment service life, increase unplanned downtime, cause production interruption, and affect equipment production efficiency. Parking and cleaning add maintenance costs and additional labor load. Conventional maintenance methods include chemical cleaning, high-pressure water flushing, scale inhibitor, manual mechanical cleaning, disintegration and replacement, etc., but it is time-consuming and laborious, and the maintenance effect is not ideal. In daily use, the vacuum pump group can be maintained in time to avoid many failures.
The above is the content of the vacuum pump manufacturer.