The vacuum pump has been used for a long time. It is inevitable that the rotating speed will be too low. Let's analyze the reasons.
1. The drive belt is worn. There are many pumps with belt transmission, because of long-term use, the transmission belt is worn and loose, and slip occurs, thus reducing its speed.
2. Improper installation. If the center distance between the two pulleys is too small or the two shafts are not parallel, if the tight side of the drive belt is installed on it, the wrap angle is too small, the diameter calculation of the two pulleys is wrong, and the eccentricity of the two shafts of the vacuum pump driven by the coupling is too large, the speed of the pump will change.
3. Mechanical failure of the pump itself. If the fastening nut between impeller and pump shaft is loose or the pump shaft is deformed and bent, the impeller will move more, directly rub with the pump body, or the bearing is damaged, the speed of vacuum pump may be reduced.
4. Power machine maintenance is not recorded. Because of the burning of the motor winding and the loss of excitation, the change of winding turns, wire diameter and wiring method in the maintenance, or the failure in the maintenance is not completely eliminated, the speed of the vacuum pump will also change.
5. Human factors. Because of the damage of the original electric motor, quite a number of users are randomly equipped with another electric motor to drive, resulting in the consequences of less flow, low head or even no pumping water.
In short, when we use the vacuum pump, we must strictly follow the instructions.
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