D horizontal multistage pump pump than the analysis of the causes of current or current is too large

According to the user response D horizontal multistage pump pump over current occurs on running this kind of imagination, and what is the reason of this phenomenon? When D type horizontal multi-stage pump appeared in excess of the current phenomenon, should immediately stop the inspection on pumps and handled timely, so that we can ensure no failure pump unit, and can effectively run. Below small make up horizontal multi-stage pump current is too large to to tell you about the cause and the treatment methods.

       1. Hm low

actual model selection of the horizontal multi-stage pump in the hm hm than pump design is too low, lead to the pump flow, increase resistance motor overload operation of the impeller, cause than current; Or selected model selection when the lift head is much higher than the actual working condition and to appear the phenomenon of super current.

solution: this can be installed through the outlet valve to adjust the flow; To new selection, choosing the best hm pump or adjust the outlet valve, make the flow decreases.

       2. Packing gland too tight

D model of the multistage pump or by packing seal, must pressure multistage pump not leak can be ensured, and management in order to make the water pump is not leaking too tightly on the packing, increasing the friction between packing and shaft sleeve, water pump turn up will be hard, cause than current. Solution, loosen the packing, in guarantee multistage pump more flexible rotation without leaking.

       3. The balancing disk or ring wear

multistage centrifugal pump of balance disc or the balance disc wear lead to a certain extent, the D type pump impeller and pump of internal friction, make the motor overload. Multistage pump super current fifty percent are caused by this reason. Solution: replace the balance disc and the gimbal ring, and adjust the volume of good pump series.

       4. Installation of unqualified

D different heart, multi-stage pump and motor or not adjusted the coupling between the clearance to adjust the concentricity of the pump and motor, when it is necessary to add gasket, colleagues to adjust good clearance between the pump and itu. Multistage water pump it is important to note that when using the above problem, also want to consider the problem of voltage and line, whether low voltage cables are too thin or too long. These can cause multistage pump current.

       5. Other factors

1) running high speed makes the motor overload operation, thus appeared the phenomenon of super current, should take relevant measures to reduce the speed of the multistage pump running;

2) Type D multistage water pump matching power is lower than the actual supporting power, it also increases the motor load, replace the high power motor as soon as possible to reduce the losses;

3) Bearing or the shaft bending, should immediately check the pump shaft and bearing fault, if there are needs to be changed accordingly;

4) Packing gland pressure is too tight, accordingly adjusted loose;

5) In the process of D type pump, pump shaft coupling and motor coupling gap is too big or their different heart, to adjust the water pump shaft coupling;

7) Electrical pilot time to stop using lead to unstable when the motor running, this can let the motor run after a period of time will gradually calmed.

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