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
CN105508015AActive Publication Date: 2016-04-20SHANGHAI BROSE ELECTRIC MOTORS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI BROSE ELECTRIC MOTORS
Publication Date
2016-04-20

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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.
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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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