Plastic impeller structure of submersible electric pump for well and injection molding processes thereof

Abstract

The invention relates to a plastic impeller structure which is characterized by being prepared from a front cover plate of an impeller, a back cover plate of the impeller and an upper cover plate of the impeller. An oral ring is arranged on the front cover plate of the impeller, a hub and 4-8 blades are arranged on the back cover plate of the impeller, the bottoms of the blades are plane or arc-shaped, openings are uniformly formed in the circumference of the back cover plate of the impeller, a welding energy line I is arranged on each blade, bumps are uniformly distributed on the circumference of the upper cover of the impeller, and a welding energy line II is arranged in a groove of the upper cover plate of the impeller. The upper cover plate of the impeller and the back cover plate of the impeller are integrally welded to form back cover plate cover. The back cover plate part and the front cover plate of the impeller are welded to an impeller assembly. The plastic impeller structurehas the characteristics of being reasonable in design, simple in structure, easy to injection mold and open mold and easy to produce in batches, is high in production efficiency, high in part precision, low in manufacturing cost, and low in surface coarseness, can reduce the hydraulic loss of a liquid flow in an impeller runner effectively and enhance the hydraulic efficiency of the impeller.

Description

technical field [0001] The invention belongs to the technical field of centrifugal pumps, and relates to a well submersible electric pump used for agricultural irrigation and domestic water, in particular to a plastic impeller structure of the well submersible electric pump and its injection molding process. Background technique [0002] At present, in the existing domestic technology, the well submersible electric pump is composed of two parts: the well submersible motor and the well submersible pump; among them, the well submersible pump is an energy conversion device, which converts the mechanical energy of the motor rotation into the kinetic energy of the liquid flow And the pressure potential energy; and the main part responsible for the energy conversion of the well submersible pump is the impeller. Therefore, the design and processing quality of the impeller directly affect the performance indicators of the entire product. The traditional plastic impeller is usually c...

AI Technical Summary

Problems solved by technology

The traditional plastic impeller is usually composed of two parts: the impeller front cover plate and the impeller rear cover plate. The blade design often adopts cylindrical blades to facilitate injection molding; while the smaller blades and the twisted blades with the angle between the flow surface are in the blade design. It is very easy to form a negative draft at the back of the entrance, making it difficult or even impossible to open the injection mold

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