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What are the reasons why the impeller speed of a leak-free chemical pump decreases?

18 Jan 2021Email

When we use non-leakage chemical pumps, we must understand the reasons why the impeller speed of the non-leakage chemical pumps decreases, so that the pump can be used accurately and reasonably, and the failure efficiency of the non-leakage chemical pumps and the service life of the pump can be improved.

 

Rotation speed refers to the number of times the pump shaft or impeller rotates per minute. Usually expressed by the symbol n, the unit is revolutions per minute (rmin)

The speed of a leak-free chemical pump has a close relationship with other performance parameters. A certain speed produces a certain flow, head, and corresponding shaft power. When the speed changes, other performance parameters will change accordingly. The pump is It is designed according to a certain speed, so in addition to the power of the supporting power machine, the power should meet the operating conditions of the pump, and the speed should also be consistent with the pump speed. The reasons that cause the impeller speed of the water pump to decrease are:

   1. The mechanical failure of the non-leak chemical pump itself. 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

  2, motor maintenance efficiency is reduced. 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 failures in the maintenance process will also cause the pump speed to change.

   3. Human factors. Some users arbitrarily equipped with another motor to drive because the original motor was damaged, resulting in the consequence of small flow, low lift or even no water supply.

  4. No-leak chemical pump, if there is debris in the pump cavity, it will become entangled, causing the impeller speed to decrease.

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