High viscosity internal gear pump which may occur during the inventory

NCB-type internal gear pump gear is the use of gear meshing principle, the internal and external gear pitch circle close to one side, the other side is covered by the pump "crescent" separated because of the high viscosity medium can be widely used in all walks of life, but In the actual travel there will be problems. Below we make the following analysis of these problems and solutions:

Possible NCB internal gear pump failure and the reasons:

First, the flow is small (lack of suction)

Reason: 1, there is air leakage in the suction pipe; 2, the suction pipe is not immersed in liquid; 3, suction inlet diameter is small; 4, the gap is too large; 5, the pump shaft speed is slow; Worn

Second, the flow is not stable

Reason: 1, the end of the suction pipe may have air leaks or lack of liquid; 2, liquid vaporization;

Third, the pump noise

Reason: 1. The electric current is too big; 2. The liquid viscosity is big; 3. The rotational speed is too high; 4. The outlet pressure is higher than the rated value; 5. The material is insufficient; 6. The packing gland presses too tightly 7, The unit is loose.

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