Closed impeller provided with twisted blades and applicable to water pump and machining technology of closed impeller

Abstract

The invention discloses a closed impeller provided with twisted blades and applicable to a water pump and a machining technology of the closed impeller. The impeller comprises single twisted blades; aplurality of single twisted blades are assembled sequentially to form the closed impeller; each single twisted blade is formed through overall milling by the aid of a five-axis CNC machine tool; assembled positions of every two adjacent single twisted blades are connected through welding and form welding lines; and the number of the welding lines is equal to that of the single twisted blades of the closed impeller. According to the impeller and the technology, the manufacturing accuracy, the surface smoothness and the weight uniformity of the closed impeller are substantially improved, the manufacturing cycle of the closed impeller is substantially shortened, the problems of large machining difficulty and the like of the overall large-distortion and multi-blade milling technology are solved, meanwhile, the structural reliability and the hydraulic performance of the closed impeller are improved, and vibration of the closed impeller is reduced.

Description

technical field [0001] The invention relates to the technical field of pump impeller manufacturing technology, in particular to a closed impeller with twisted blades of a water pump and its processing technology. Background technique [0002] At present, several common water pump impeller processing technologies are: [0003] 1) Traditional open mold casting: At present, low-vibration noise and high-efficiency blades are usually designed by increasing the number of blades and distorting blades. It is often difficult to achieve impellers with large blade space distortion and a large number of blades by using traditional open mold casting methods, and the cost of casting impellers is high. , Long production cycle, low precision, rough surface, low precision and poor consistency of impeller produced by mold casting, not suitable for precision manufacturing of impeller, let alone low-vibration, noise and high-efficiency impeller water pump production; [0004] 2) Stamping + riv...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a water pump twisted blade closed impeller and its processing technology, which greatly improves the manufacturing accuracy of the closed impeller, the surface smoothness and the uniformity of the closed impeller weight, and greatly shortens the closed impeller. The manufacturing cycle solves the problems of large distortion and high processing difficulty in the overall milling process of multiple blades, and at the same time improves the structural reliability and hydraulic performance of the closed impeller and reduces the vibration of the closed impeller

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