Double rotary vane vacuum pump in high temperature, how to solve

a, why double rotary vane vacuum pump of high temperature?

1。 High electric power and high working current leads to high temperature in the vacuum pump.

2。 Fan blade number less, the air quantity is little. The fan speed is low, little wind pressure and wind.

3。 Vacuum pump motor of busbar voltage is 380 v, uneven distribution of pressure drop due to cable and load, motor actual applied voltage is 365 v, low voltage led to run large current.

4。 Motor with dirt and oil, reduce the heat dissipation capacity, leading to a high temperature vacuum pump.

two, two stage rotary vane vacuum pump of high temperature solution

the motor power and speed matching with vacuum pump, can't change. Fan installed on the main shaft of the motor. The speed of the motor determine the fan speed, can not be replaced. While increase the number of the fan blade can play a role, but when the blade number increases, the dynamic balance is not easy to find. If alignment is not good, the vibration of the motor will increase.

1。 The original extended double rotary vane vacuum pump fan cover 40 centimeters, and internally installed a same axial flow fan and fan casing diameter. Axial flow fan motor power of 850 watts, speed is 1489 RPM, voltage is 380 v, the original fan is constant. Axial flow fan is controlled by another power source, and axial flow fan and the main motor interlock. Vacuum pump starts, immediately start the axial flow fan, and 30 minutes after vacuum pump closed closed axial flow fan, to fully cooling main motor.

2。 On a regular basis to dust removal of vacuum pump motor, keep the motor heat sink clean, increase its thermal capacity.

3。 Adjust the vacuum water pump of busbar voltage to 400 volts.

it is well known that vacuum pump oil in the rotary vane vacuum pump plays a very important role, especially the 2 X rotary-vane vacuum pump, its performance is closely related to the vacuum pump oil, especially the limiting vacuum of vacuum pump pressure and service life. Vacuum pump oil is not only as a medium for vacuum, also have the effect of lubrication, cooling and vacuum pump seal sore spot.

3, the main performance of double rotary vane vacuum pump oil

1. Very low vapor pressure. This is the most important performance of the vacuum pump oil. Because of the rotary-vane vacuum pump are required high vacuum degree, generally USES paraffin base oil narrow fractions.

2。 Good thermal oxidation stability. Vacuum pump continuously rapid development. Due to the high speed friction between sliding vane and pump body, high oil temperature, oil easy oxidation decomposition. In particular, the diffusion pump often work at very high temperature environment, it increases the vapor pressure in the system and reduces the degree of vacuum. Therefore, vacuum pump oil needs to have good thermal oxidation stability.

3。 Proper viscosity and good viscosity-temperature characteristic. Vacuum pump chamber internal changing in order to form the exhaust volume effect, this requires a lubricating oil with proper viscosity and viscosity-temperature properties.