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Noise-reduction cross-flow fan

A technology of cross-flow fan blades and noise reduction, which is applied to the components of pumping devices for elastic fluids, non-variable-capacity pumps, pump devices, etc., can solve the problems of uneven airflow in the blade outlet area, and improve the flow Separation, improved aerodynamic and noise performance, improved sound quality

Pending Publication Date: 2018-05-29
GUANGDONG SUNWILL PRECISING PLASITC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the impeller rotates, the airflow in the blade outlet area has great inhomogeneity

Method used

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  • Noise-reduction cross-flow fan
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  • Noise-reduction cross-flow fan

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Embodiment Construction

[0014] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the ensuing description some specific details are referred to for a thorough understanding of the present invention. While the present invention can be practiced without these specific details, the description and representations herein can be used by those skilled in the art to more effectively convey the substance of their work to others skilled in the art.

[0015] refer to figure 1 , figure 2 , a noise-reducing cross-flow fan blade, including a partition 1 and a blade 2 on the partition 1, the cross section of the blade 2 is arc-shaped, and the blade 2 includes an inner part 3 and an outer part 4, and the outer part 4 is wavy, that is, a wavy distribution similar to a sinusoidal curve, which disperses the impact of the gas on the blade 2...

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Abstract

The invention discloses a noise-reduction cross-flow fan. The noise-reduction cross-flow fan comprises a partition plate and a blade on the partition plate, the section of the blade is in an arc shape, and the blade comprises an inner side part and an outer side part. The outer side part is in a wave shape. The original traditional shape of the blade of the cross-flow fan is changed, and the waveshape similar to sine curve distribution is adopted, the flowing separating condition of the force absorbing face can be improved well, the uniformity of an air flow is improved, the pneumatic and noise performance of the cross-flow fan is improved, and the sound quality problem of the cross-flow fan is solved to a certain degree.

Description

technical field [0001] The invention relates to the technical field of centrifugal fans, in particular to a method for designing the volute profile of a discontinuous centrifugal fan. Background technique [0002] At present, the rotational noise of cross-flow fans is also called discrete frequency noise or blade passing frequency noise. There are two mechanisms for its occurrence: 1. When the impeller rotates in free space, due to the impact of the blade on the surrounding gas medium, a certain fixed position adjacent to the blade The upper air is periodically excited by the blade and its pressure field to generate noise, which is essentially rotating noise; second, the effect of the wake of the blade produces another type of rotating noise. When the airflow flows through the blade, a boundary layer is formed on the surface of the blade, especially the boundary layer of the suction edge is easy to thicken, and many eddies are generated. At the trailing edge of the blade, t...

Claims

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Application Information

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IPC IPC(8): F04D29/30F04D29/68F04D25/08
CPCF04D25/08F04D29/30F04D29/681
Inventor 方挺温选锋
Owner GUANGDONG SUNWILL PRECISING PLASITC CO LTD