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How to solve the problem of low speed of centrifugal pump?

2020-10-30
1. Human factors. A considerable number of users arbitrarily equipped with another motor to drive due to the damage of the original motor. As a result, the flow rate is low, the head is low, and the water cannot be pumped.
2, the transmission belt is worn. Many large-scale water separation pumps use belt transmission. Due to long-term use, the transmission belt is worn and loose, and slipping occurs, which reduces the pump speed.
3. Improper installation. The center distance between the two pulleys is too small or the two shafts are not parallel, the tight side of the transmission belt is installed on it, resulting in too small wrap angle, the calculation of the diameter of the two pulleys, and the large eccentricity of the two shafts of the coupling drive water pump will cause the pump Speed ​​changes.
4. The water pump itself has a mechanical failure. The impeller and the pump shaft fastening nut loose or the pump shaft is deformed and bent, causing the impeller to move too much, directly rubbing against the pump body, or bearing damage, which may reduce the pump speed.
5. Power machine maintenance is not recorded. The motor loses its magnetism due to the burning of the windings. Changes in the number of winding turns, wire diameters, and wiring methods during maintenance, or failure to completely eliminate factors during maintenance will also change the speed of the water pump.
Centrifugal pumps have various forms such as vertical, horizontal, single-stage, multi-stage, single-suction, double-suction, and self-suction. Centrifugal pumps work by using the rotation of the impeller to make water produce centrifugal movement. Before the pump is started, the pump casing and suction pipe must be filled with water, and then the motor is started, so that the pump shaft drives the impeller and the water to make a high-speed rotation movement. The channel flows into the pressurized water pipeline of the water pump.