Integrally-formed bent-swept combined blade, impeller and axial flow fan

Abstract

The invention provides an integrally-formed bent-swept combined blade and a mining axial flow fan. A plurality of bent-swept combined blades are uniformly mounted in the circumferential direction of a hub to form an impeller, a gravity center stacking line for controlling the blade body shape of the bent-swept combined blade is a secondary Bezier curve, and a primary impeller and a secondary impeller of the mining axial flow fan are oppositely arranged, and rotate in opposite directions. According to the integrally-formed bent-swept combined blade, the gravity center stacking line for controlling the blade body shape of the bent-swept combined blade is the secondary Bezier curve, the radial force gradient of the blade and secondary flow distribution along the blade height are effectively controlled, boundary layer accumulation is eliminated, vortex convergence is avoided, vortex noise is reduced, the aerodynamic performance of the mining axial flow fan is improved, and the working efficiency of the mining axial flow fan is improved. Experiments prove that the total pressure efficiency of the mining axial flow fan is 87%, and the total pressure efficiency is improved by more than 5% compared with that of a traditional mining axial flow fan.

Description

technical field [0001] The invention belongs to the field of coal mine ventilation, and relates to a mining axial flow fan, in particular to an integrally formed curved and swept combination blade, an impeller and an axial flow fan. Background technique [0002] As the main technical equipment for mine safety production, mine fan is an important part of mine ventilation system and the basis for mine safety production and disaster prevention. The operating efficiency and reliability of mining fans are the focus of coal mine concern. Due to the aging of local old mine fans and low operating efficiency, they are gradually being replaced by high-efficiency energy-saving fans. Various fans have emerged as the times require. Replacement products with fans. It is favored by coal mines for its high pressure, large flow, high efficiency, compact structure, and easy wind resistance. However, temporary practice has proved that the counter-rotating axial flow mine fan still has some ...

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an integrally formed curved and swept combined blade, impeller and axial flow fan to solve the problem of reducing the aerodynamic performance of the mining axial flow fan in the prior art while improving Technical Problems of Working Efficiency of Mine Axial Flow Fan

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