Impeller and guide vane structure of multi-stage self-priming centrifugal pump

Abstract

The invention discloses an impeller and guide vane structure of a multi-stage self-priming centrifugal pump. The structure comprises the parts of impellers, guide vanes, guide vane cover plates, impeller inlet check rings, stainless steel inserts, shafts, a hexagon lock nut, a gasket and the like, and the structure is mainly characterized in that firstly, a group of sealing devices comprising an impeller inlet check ring and an insert are added to the inlet of each impeller, the impellers inlet check rings and the inserts are made of a polyphenyl ether material and a stainless steel material respectively, and each impeller inlet check ring can move left and right on an impeller ring; and secondly, negative guide vanes with extending inlet edges are adopted, the inlet edges of the guide vane blades are inclined, the diameter of each impeller approximates the inside diameter of each guide vane cover plate, the outlet edge of each impeller blade bevels and is parallel to the inlet edge of each guide vane blade, and an interval between the two edges ranges from 0.5 mm to 1 mm. The impeller and guide vane structure of the multi-stage self-priming centrifugal pump has the benefits that a single-stage head of the multi-stage self-priming centrifugal pump is improved, and the manufacturing cost and leakage loss of the multi-stage self-priming centrifugal pump are reduced.

Description

Technical field [0001] The invention belongs to the technical field of centrifugal pumps, and in particular relates to a multi-stage centrifugal pump impeller guide vane structure with a self-priming function, which is mainly used for pumping high-pressure liquids in occasions where frequent starting or difficult filling of liquids occurs. Background technique [0002] According to the national standard "terms of sprinkler irrigation machinery" (GB6956-86), the self-priming centrifugal pump is referred to as the self-priming pump. The mixing and segregation of air and water will gradually discharge the air in the water inlet pipe, and the degassed water will return to the appropriate position in the pump through the return channel and repeat the above process, so as to achieve the purpose of self-priming and filling the centrifugal pump. Except that it needs to be irrigated for the first time, it does not need to be irrigated after it is started. After a short period of oper...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the traditional multi-stage self-priming centrifugal pump impeller diameter size is limited and the production cost is too high, the present invention provides a multi-stage self-priming centrifugal pump impeller guide vane structure, which can not only improve the multi-stage self-priming centrifugal pump The single-stage head of the pump reduces the production cost of multi-stage self-priming centrifugal pumps, and also forms a good self-priming capacity

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