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Low-rotation-noise cooling fan for automobile engine

A technology of automobile engine and cooling fan, which is applied in the direction of engine cooling, engine components, machine/engine, etc., and can solve problems such as high noise

Active Publication Date: 2016-04-20
SHANGHAI BROSE ELECTRIC MOTORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of prior art, provide a kind of automobile engine cooling fan of low rotation noise, solve the problem that existing engine cooling fan has big noise

Method used

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  • Low-rotation-noise cooling fan for automobile engine
  • Low-rotation-noise cooling fan for automobile engine
  • Low-rotation-noise cooling fan for automobile engine

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] The invention provides an automobile engine cooling fan with low rotating noise, which is used to solve the problem of relatively large rotating noise caused by uniformly distributed fan blades in the existing cooling fan, and also solves the problem that the fan works due to the setting of supporting ribs More turbulence is generated, which reduces system efficiency and worsens system noise. A low-rotating-noise automobile engine cooling fan of the present invention adopts a fan with non-uniformly distributed fan blades, and sets guide vanes on the windshield ring. The non-uniformly distributed fan blades can ensure that the fan's rotating noise is not in a harmonic order. Superimposition, which effectively reduces the rotation noise of the fan, rectifies the air passing through the fan blade through the guide vane, reduces the rotation...

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Abstract

The invention relates to a low-rotation-noise cooling fan for an automobile engine. The cooling fan comprises a fan body and a protection ring, the fan body comprises a plurality of fan blades in non-uniform distribution, and the protection ring connected with the fan body is provided with a plurality of guide blades in non-uniform distribution. Due to non-uniform distribution of the fan blades of the cooling fan, superposition of rotation noise of the fan at a harmonic order is avoided, the rotation noise and harmonic components thereof are urged to move to a non-critical order to realize reasonable distribution at each order of rotation frequency of the fan, and consequently the rotation noise can be weakened. Due to non-uniform distribution of the guide blades, time sequence uniformity in striking of the guide blades struck by trailing edge airflow of the fan blades is avoided, concentration of pressure fluctuation frequency and harmonic components at a certain specific order is avoided as well, and consequently the rotation noise of the fan is further reduced. By the guide blades for rectification of flow passing through a space behind the fan blades, rotation noise at partial orders can be reduced.

Description

technical field [0001] The invention relates to a cooling fan, in particular to an automobile engine cooling fan with low rotating noise. Background technique [0002] The car engine cooling fan is an important part of the car engine cooling system. It sends air to the car engine condenser radiator through its own rotation, and takes away the heat in the condenser radiator to ensure that the engine works at a normal temperature. However, when the cooling fan of the automobile engine generates air flow, it also causes the disturbance of the air flow and aerodynamic noise. [0003] At present, the cooling fan components of automobile engines mostly use a separate impeller stage, that is, one impeller (fan) is used, and only support ribs are added to connect the drive motor, and the front and rear guide vanes are no longer provided. Among them, the blade angle of the fan is usually designed to be equiangular distribution. This kind of fan has a large rotation noise when it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01P5/02F04D29/66F04D29/52
CPCF01P5/02F01P2050/22F04D29/526F04D29/666F04D29/667
Inventor 罗智恒李铭涛陈天赐彭志刚
Owner SHANGHAI BROSE ELECTRIC MOTORS
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