Wind shield for reducing noise and cooling fan with same

A technology of cooling fan and air shroud, applied in the direction of engine cooling, engine components, machine/engine, etc., can solve the problem of poor broadband noise reduction effect, and achieve the effect of reducing broadband noise

Pending Publication Date: 2020-04-28
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a windshield for reducing noise and a cooling fan using the windshield, which is used to solve the problem of poor broadband noise reduction effect in the prior art

Method used

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  • Wind shield for reducing noise and cooling fan with same
  • Wind shield for reducing noise and cooling fan with same
  • Wind shield for reducing noise and cooling fan with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Example of a windshield

[0025] Such as Figure 4 The windshield shown includes a base 1 , a ring body 2 and a resonant sound-absorbing structure 3 . The whole windshield is connected together with the radiator through the bolt holes on the base 1, and is fixed on the vehicle frame (as other implementations, the base 1 can also be connected with the existing The way commonly used in technology realizes the fixed connection with radiator).

[0026] The base 1 is provided with a fan port for the fan to be embedded, and a ring body 2 is arranged around the fan port (the ring body 2 can be installed and fixed with the base, or integrally formed with the base), and the inner side of the ring body 2 is connected with the front end of the fan (i.e. A resonant sound-absorbing structure 3 is provided in the space between the tops of the fan blades.

[0027] Such as Figure 5 As shown, the outermost side of the resonant sound-absorbing structure (near the fan side) is a laye...

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PUM

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Abstract

The invention relates to a wind shield for reducing noise and a cooling fan with the same. The wind shield comprises a base, a fan opening is formed in the base, and a ring is arranged around the fanopening; a resonance sound absorption structure is arranged on the inner side of the ring and comprises a hard plate with a plurality of holes and a sound absorption material; and the sound absorptionmaterial is fixed on the inner side of the ring and arranged between the hard plate and the inner side of the ring. According to the wind shield and the cooling fan, the hard plate with the pluralityof holes and the sound absorption material can form a plurality of Helmhz resonant cavities with different sound absorption frequencies, so that the sound absorption effect of the wind shield on thenoise with the frequency of hundreds to thousands of hertz is guaranteed, and the wide-band noise is reduced advantageously.

Description

technical field [0001] The invention relates to a windshield for reducing noise and a cooling fan using the windshield. Background technique [0002] The cooling fan is installed close to the radiator for heat exchange between the cooling air sucked by the fan and the cooling liquid in the radiator. A windshield (also called a fan shroud) is arranged around the fan, and the cooling air is rectified to improve heat dissipation efficiency. [0003] However, in the gap between the front end of the fan and the windshield, strong eddy currents are generated as the fan is rotated, causing noise. [0004] In order to reduce fan noise, technicians made structural improvements on the windshield. [0005] Such as figure 1 , figure 2 Two schemes provided for Japanese patent document JP4278252B2. In the gap between the fan blade 10 and the windshield 20 , a sound-absorbing material 40 is fixed on the windshield, and the sound-absorbing material 40 is fixed on the metal plate 22 . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01P5/06F01P11/12
CPCF01P5/06F01P11/12
Inventor 陈志恒田杰安郜盼盼王占彬齐伸翼
Owner ZHENGZHOU YUTONG BUS CO LTD
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