Air guide ring structure beneficial to reduction of rotation order noise and arrangement method of air guide ring structure

Abstract

The invention provides an air guide ring structure beneficial to reduction of rotation order noise and a setting method thereof.The air guide ring structure is installed at an air outlet of a fan cover, the air outlet of the fan cover comprises an air guide ring, a plurality of bosses arranged around the circumference are arranged on the air guide ring, and the upper portion of any boss is connected with a check ring of the air outlet of the fan cover through a reinforcing rib; an opening groove with an upward opening is formed in the air guide ring between any two adjacent bosses, and at least one air guide blade is arranged in the opening groove; one end and the bottom face of each air guide blade are connected with the corresponding open groove close to the air guide blade into a whole, and a first space is reserved between the other end of each air guide blade and the corresponding open groove close to the air guide blade. A plurality of open grooves are formed in the air guide ring, the blade type is designed according to an existing fan blade, the specific position, angle and height of the air guide blade needing to be added to the air guide ring are analyzed in combination with flow field analysis and sound field distribution of noise testing, and the application range is wide; the insert is added on the basis of an existing mold to produce the air guide blade, the mold does not need to be opened again, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of windshields, in particular to a wind guide ring structure and its setting method which are beneficial to reduce the noise of rotation order, which is applied to the main order of wind blades inside and outside the car faced by new energy vehicles and fan products with high NVH performance requirements Where noise is prominent. Background technique [0002] At present, the traditional DC brushed motor and brushless motor fan, at the position of the air guide ring, the design of the guide structure of the air outlet is as follows: figure 1 As shown, the air guide rings all adopt the air guide inner ring 2 and the air guide outer ring 1 arranged at intervals, wherein the cross section of the air guide outer ring 1 is a vertical Z-shaped structure, and the air guide inner ring 2 is a J-shaped structure. The height of the wind ring needs to be higher than the height of the blade flange, so as to ensure no los...

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional DC brushed motor and brushless motor fan, at the position of the air guide ring, the design of the guide structure of the air outlet is as follows: figure 1 As shown, the air guide rings all adopt the air guide inner ring 2 and the air guide outer ring 1 arranged at intervals, wherein the cross section of the air guide outer ring 1 is a vertical Z-shaped structure, and the air guide inner ring 2 is a J-shaped structure. The height of the wind ring needs to be higher than the height of the blade flange, so as to ensure no loss of flow, and also ensure the strength of the wind guide ring and the overall design. There are the following technical defects: 1) The height of the wind guide ring needs to be matched according to the system design The specific placement position, height and angle are determined by the size of the wind blade and the shape of the wind blade. It requires rich design experience and experimental data to give specific design parameters, and the general effect is poor; 2), because the structure of the wind guide ring is basically uniform And the axial symmetrical design structure, uniform height and direction, can not take into account the directionality of the flow field and the sound phase angle when the fan blade rotates. For example, there is a phenomenon of loud noise in a certain part of the car. Structural design and air outlet structure design put forward more difficult requirements; 3), traditional order noise improvement means, including fan blade shape improvement, wind cover overall design improvement, rib shape improvement, fit space improvement, etc., Both need to re-open the mold for production, and the production cost is high

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