Axial fan

Abstract

The invention discloses an axial fan, comprising a hub and a plurality of blades arranged on the periphery of the hub. Leading edges of the blades are provided with thickened sections, the thickened sections extend from the root of the hub to outer edges of the blades, and extend by a set length from the leading edges of the blades to the rear edges of the blades along an equal-primitive arc; and the blades bend to a suction surface or a pressure surface, so the suction surface or the pressure surface is enabled to form a curved surface. During the movement of the axial fan, the shudder and the eddy current phenomenon of the blades are reduced, the noise produced by the axial fan is decreased, and the overall performance of the axial fan is improved.

Description

technical field [0001] The invention relates to the technical field of axial flow wind wheels, and more specifically relates to an axial flow fan. Background technique [0002] Axial flow fans are widely used as air supply components in air conditioner outdoor units and some ventilation equipment. An axial flow fan includes a hub and several blades arranged on the hub, and the design of the blades directly affects the overall performance of the outdoor air conditioner and air supply equipment. [0003] When the hub of the existing axial flow fan rotates, the blades of the axial flow wind wheel will produce relatively strong trembling vibration with the rotation of the hub, causing the vibration of the entire axial flow fan, which in turn leads to strong vibration of the whole machine, resulting in greater noise impact . At the same time, the existing axial flow fan blades are relatively flat. When the axial flow rotates, a large pressure difference will be generated betwee...

AI Technical Summary

Problems solved by technology

[0003] When the hub of the existing axial flow fan rotates, the blades of the axial flow wind wheel will produce relatively strong trembling vibration with the rotation of the hub, causing the vibration of the entire axial flow fan, which in turn leads to strong vibration of the whole machine, resulting in greater noise impact

At the same time, the existing axial flow fan blades are relatively flat. When the axial flow rotates, a large pressure difference will be generated between the pressure surface and the suction surface of the blade. The backflow of the suction surface in the state will cause gas turbulence, separation of the boundary layer and vortex phenomenon, which will increase the noise of the fan and affect the performance and service life of the whole machine.

[0004] It can be seen that the existing axial flow fan will generate relatively large noise due to blade tremor and blade vortex phenomenon, which will affect the performance of the axial flow fan. Therefore, how to solve the noise problem caused by blade tremor and vortex phenomenon during the rotation of the axial flow fan It is a technical problem that those skilled in the art urgently need to solve

Images