Noise suppression fan

A technology for noise suppression and fans, which is applied to components of pumping devices for elastic fluids, non-variable displacement pumps, machines/engines, etc., can solve the problems of discrete single sound of cooling fans, and achieve the effect of reducing fan noise.

Active Publication Date: 2020-07-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of the combination of discrete single-tone and broadband noise of the cooling fan, and ensure the aerodynamic performance of the cooling fan, the present disclosure provides

Method used

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Embodiment Construction

[0028] The present disclosure will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.

[0029] It should be noted that, in the case of no conflict, the implementation modes and the features in the implementation modes in the present disclosure can be combined with each other. The present disclosure will be described in detail below with reference to the drawings and embodiments.

[0030] See attached figure 1 , the present disclosure provides a noise suppression fan, including a rotor 1 and a stator 3 . The rotor 1 of the fan includes a number of moving blades, and the stator 3 of the fan includes a number of stationary blades. In this disclosure, the nu...

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Abstract

The invention provides a noise suppression fan. The noise suppression fan comprises a rotor and a stator, wherein the rotor is suitable for disturbing air and enabling the air to flow towards the stator; the stator comprises a plurality of static blades and a stator base, the static blades uniformly wind around the stator base, and the rotor comprises a plurality of moving blades; the noise suppression fan further comprises a noise suppression device arranged between the rotor and the stator, and the noise suppression device comprises wire meshes with the number equal to that of the static blades and is arranged at complete development sections of wakes of the moving blades; and at the complete development sections, the difference between the axial speed of a wake core area fluid and the average axial speed of a non-wake mainstream is within 10%. The wire meshes are arranged at the complete development sections of the wakes of the moving blades, so that noise is effectively suppressed,and the aerodynamic performance of the fan is guaranteed.

Description

technical field [0001] The present disclosure relates to the field of cooling fans, and more particularly to a noise-suppressed fan. Background technique [0002] A cooling fan is a commonly used heat dissipation device, which disturbs the airflow through rotating blades, and sends cooling airflow to the electronic equipment to achieve the purpose of controlling the temperature of the electronic product. The rotation of the cooling fan will generate a lot of noise, especially for fans with high speed and high flow, the aerodynamic noise generated is more serious. The reason is that the wake vortex of the fan blade of the high-speed, high-flow fan will generate noise when it passes through the fan stator blade. When the airflow passes through the blade, a boundary layer is generated on the surface of the blade, and a viscous wake is generated downstream of the blade. The rotational-static interference between the rotor or stator and the upstream wake will produce discrete p...

Claims

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Application Information

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IPC IPC(8): F04D29/66F04D29/02F04D19/00F04D29/52F04D29/54F04D29/32
CPCF04D19/002F04D29/023F04D29/325F04D29/522F04D29/542F04D29/663F04D29/667
Inventor 李晓东刘宇超陈超
Owner BEIHANG UNIV
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