A low noise forward curved centrifugal fan impeller

A centrifugal fan and impeller technology, which is applied in the direction of mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as noise, achieve the effect of reducing severe impact and improving wake-jet flow

Active Publication Date: 2022-05-13
FOSHAN CITY NANHAI POPULA FAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a low-noise forward-curved centrifugal fan impeller, which aims to solve the problem of noise generated by the low-noise forward-curved centrifugal fan impeller in the prior art due to high-speed wake-jet flow

Method used

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  • A low noise forward curved centrifugal fan impeller
  • A low noise forward curved centrifugal fan impeller
  • A low noise forward curved centrifugal fan impeller

Examples

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Embodiment Construction

[0030] The present invention is described in detail below in conjunction with specific embodiments.

[0031] The present invention provides a low noise forward bending centrifugal fan impeller, such as Figures 1 through 7 Shown, comprising a base plate 1, a top plate 2 and a circumferential array connected to a plurality of blades between the bottom plate 1 and the top plate 2 3. Preferably, the blade 3 is a sheet metal blade with a thickness of 1.5-5mm, there are 12 blades 3 in a circumferential array between the base plate 1 and the top plate 2.

[0032] as Figure 3 As shown, the profile of the planar unfolding structure of the blade 3 is as follows: comprising the bottom edge 31 connected to the bottom plate 1 and the top edge 32 connected to the top plate 2, the inlet end of the bottom edge 31 is connected to the inlet edge 33 extending upwards, the outlet end of the bottom edge 31 is connected to the outlet bevel 34 that extends upwards in the direction of the impeller, the o...

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Abstract

The invention relates to the technical field of ventilation equipment, in particular to a low-noise forward-curved centrifugal fan impeller. The hypotenuse of the outlet extends upwards towards the center of the impeller, and the angle between the hypotenuse of the outlet and the bottom is 45°; the projection structure of the blade on the bottom plate is as follows: including the first projected straight line segment connected in sequence away from the center of the impeller , the projected arc segment and the second projected straight line segment, the two ends of the projected arc segment are respectively tangent to the first projected straight line segment and the second projected straight line segment, the clip between the first projected straight line segment and the second projected straight line segment The angle is 105°, and the radius of the projected arc segment is 50% of the difference between the radius of the outer ring of the impeller blade and the radius of the inner ring of the impeller blade. The impeller of the low-noise forward-curved centrifugal fan produces less aerodynamic noise and can achieve the purpose of noise reduction.

Description

Technical field [0001] The present invention relates to the technical field of ventilation equipment, specifically to a low noise forward curved centrifugal fan impeller. Background [0002] The forward bending centrifugal fan is widely used in daily life and industrial production with its characteristics of high pressure, large output air volume, low cost and compact size. [0003] However, due to the existence of a high-speed wake-jet flowing along the direction of its front-bending blades inside the front-bending centrifugal fan, the high-speed jet will also produce a violent collision with the volute and emit noise, so the operating noise of the forward-bending centrifugal fan is generally greater than that of the back-bending centrifugal fan, which makes the noise pollution of the forward-bending centrifugal fan more serious, especially as the country begins to promote stricter fluid mechanical noise standards at the industry level, which greatly limits the application of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/66
Inventor 蔡涛霍慧林志良
Owner FOSHAN CITY NANHAI POPULA FAN
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