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2 Strategies

     Electrical power and pump speed are matched, can not be changed. Fan mounted on the spindle motor, the motor speed determines the fan speed can not be replaced. Increase in the number of fan blades are able to play a role, but the increase in the number of leaves, the dynamic balance is not easy to find, such as looking for is not good, can cause increased motor vibration.

     (1) extended the original fan hood 40cm, inside the installation of a fan cover with the diameter of axial flow fan, axial fan motor power 850W, speed of 1489r/min, voltage 380V. Continue to retain the original fan. Axial flow fan all the way to establish a separate power control, the main axial flow fan motor with no chains. Timely start after pump axial flow fan is running, vacuum 30min outage after outage axial flow fan, so that the full cooling of main motor;

     (2) motor on a regular basis to remove dust, motor heat sinks to keep clean and to increase its cooling capacity;

     (3) vacuum pump adjusted to where the bus voltage 400V.