Method for producing high efficiency energy saving fan vane using fin structure section bar

Abstract

The present invention relates to fan vane wheel making technology. The process of making efficient energy saving fan vane wheel with fin structure section bar includes twisting vane section bar, machining the contact curved surface between the vane root and the hub, setting vane wheel connecting part, vane surface modification, connecting the vane root and the hub and vane wheel surface protecting treatment. The said process can produce low noise energy saving vane wheel, and can meet the personalized design requirement and realize mass production of vane in high production efficiency and high product quality. The present invention may be used widely in manufacture of different kinds of fan.

Description

technical field [0001] The invention relates to a processing method of a fan impeller, more precisely, a method for manufacturing a fan impeller by using an airfoil structure profile. Background technique [0002] The performance of the fan impeller depends to a large extent on the shape of the fan impeller blades. In the prior art, the usual processing methods for airfoil fan blades are molding, casting, mold milling, and manual modification. The impeller is heavy. , high energy consumption, large-scale production is difficult, and quality is not easy to guarantee. At present, there is no processing method with a clear processing standard that can truly adapt to mass production of airfoil fan blades. Publication No. CN 1406708A discloses a method for processing the blades of axial flow fans. It is to extrude the aluminum alloy profiles of equal cross-section of the airfoil on the extruder, and then clamp the two ends of the blades with clamps or divide the blades into two ...

AI Technical Summary

Problems solved by technology

This method has the following deficiencies: (1) affected by the operating conditions of the blower fan, the forms of the blades are various, so when processing, they will correspond to profiles of various cross-section forms, and there is no clear processing standard in the whole processing process in this invention , not only is it difficult to form large-scale, standardized, and serialized production, but it will also seriously affect the performance of the fan, causing a large difference between product performance and design results and prototype performance, and it is difficult to meet the design requirements; (2) the twist angle processing method There are deficiencies, one of the methods disclosed in the document: "clamp both ends of the blade with a fixture, let the two fixtures rotate relative to each other, and give a torsion moment to the blade blank", the blade processed by this method, from the blade root to the blade top The torsion angle of the fan blade is uniform and consistent, which cannot meet the aerodynamic design requirements of the change of the torsion angle value at each position of the fan blade; the second method: "divide the blade into several sections, clamp the two ends of each section and let the two fixtures rotate relative to each other, and give the blade blank a Torsional moment, causing the blades to twist and deform”, although this method can produce different twist angles from the blade root to the tip of the blade, but it is difficult to form a continuous and uniform change in the twist angle value, which will also affect the performance of the fan

[0003] The performance of the fan has high precision requirements for the installation angle of the blade and the matching of the contact surface between the blade and the hub. For the fan blade with a certain twist angle, the processing of this surface is very difficult. Currently, manual grinding is generally used. However, the production efficiency and precision of this method are very low, and it is difficult to ensure the connection accuracy between the blade and the hub

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