CN103775378B

CN103775378B - Centrifugal fan impeller structure

Info

Publication number: CN103775378B
Application number: CN201210397705.2A
Authority: CN
Inventors: 杨志伟; 李生丕
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2012-10-18
Filing date: 2012-10-18
Publication date: 2016-09-21
Anticipated expiration: 2032-10-18
Also published as: CN103775378A

Abstract

A kind of centrifugal fan impeller structure, comprise: a wheel hub has multiple flabellum, described flabellum is extended institute's configuration by this wheel hub week along the direction to this wheel hub contrary, there is between described flabellum a runner and an air outlet and an air intake vent, described air outlet and this air intake vent are divided into this runner two ends, and be connected with this runner, described air outlet is non-equidistant placement, by the noise that air outlet can be greatly reduced operating with non-equidistant placement.

Description

Centrifugal fan impeller structure

Technical field

A kind of centrifugal fan impeller structure, the centrifugal fan impeller structure of a kind of noise reduced when centrifugal fan operates.

Background technology

Existing electronic industry develops rapidly, the performance of electronic component constantly promotes, along with the fastest heat produced by it of arithmetic speed then can produce bigger heat relatively, if cannot this heat be discharged antipyretic immediately, then this electronic component operation efficiency then can reduce, severe patient then can cause and burn, therefore by small-sized centrifugal fan as antipyretic use in limited system space, this centrifugal fan consists predominantly of a framework, one fan hub, and it is located on the multiple flabellums outside this fan hub, this framework its respectively there is an air inlet, its side has an air outlet, the most then rotarily drive surrounding air by described flabellum to flow, the axial device entered from air inlet circulation is discharged to after the radial air flow of this fan hub by air outlet.

During centrifugal fan operating, noise will be produced with the reciprocal action of the tip of the tongue because impeller is flowed out uneven wake flow (non-uniform wake), and when the gap of impeller and the tip of the tongue is narrow, noise is caused to obtain the tip of the tongue concussion tongue oscillations by wake flow in the pressure differential near the impact and the tip of the tongue of the tip of the tongue) impact, when gap reaches the 20% of impeller radius, main noise source only remains the impact of wake flow, and the least.The blade (Short vane) additionally increasing end between impeller blade can reduce the intensity of wake flow so that wake flow is less obvious on the impact of pressure disturbance and noise；Therefore known technology has the disadvantage that

1. structure design is limited；

2. cannot be according to characteristic flexible design；

3. noise is big.

Summary of the invention

To this end, be the shortcoming solving above-mentioned known technology, it is a primary object of the present invention to provide a kind of centrifugal fan impeller structure having and reducing noise.

In order to achieve the above object, the present invention is to provide a kind of centrifugal fan impeller structure, comprises: a wheel hub；

Described wheel hub has multiple flabellum group, described flabellum is extended institute's configuration by this wheel hub week along the direction to this wheel hub contrary, there is between described flabellum a runner and an air outlet and an air intake vent, described air outlet and this air intake vent are divided into this runner two ends, and be connected with this runner, described air outlet is non-equidistant placement.

Select to arrange with different spacing by the air outlet between described flabellum, the flabellum single-tone by tongue mouth (BPF) can be reduced, and (BPF) frequency can be increased, reduce acoustic pressure weighted volumes and noise is greatly reduced, and can be according to boundary condition flexible design blade structure.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of the centrifugal fan impeller structure first embodiment of the present invention；

Fig. 2 is the top view of the centrifugal fan impeller structure first embodiment of the present invention；

Fig. 3 is the top view of centrifugal fan impeller structure second embodiment of the present invention；

Fig. 4 is the top view of centrifugal fan impeller structure the 3rd embodiment of the present invention.

Main element symbol description

Wheel hub 11

Flabellum 111

Runner 111a

Air outlet 111b

Air intake vent 111c

First end 1111

Second end 1112

Flabellum center line 1113

First pitch circle 12

First tangent line 13

Second tangent line 14

Air inlet angle 15

3rd tangent line 17

4th tangent line 18

Air-out angle 19

Detailed description of the invention

The above-mentioned purpose of the present invention and structure thereof and characteristic functionally, will be explained according to the preferred embodiment of institute's accompanying drawings.

Refer to Fig. 1, Fig. 2, for the solid of centrifugal fan impeller structure first embodiment and the top view of the present invention, as it can be seen, described centrifugal fan impeller structure, comprise: a wheel hub 11；

Described wheel hub 11 has multiple flabellum 111, described flabellum 111 is extended institute's configuration along the direction to this wheel hub 11 contrary in 11 weeks by this wheel hub, there is between described flabellum 111 a runner 111a and an air outlet 111b and an air intake vent 111c, described air outlet 111b and this air intake vent 111c is divided into this runner 111a two ends, and be connected with this runner 111a, described air outlet 111b is non-equidistant placement.

Described flabellum 111 has one first end 1111 and one second end 1112, and this air intake vent 111c is defined jointly by the first end 1111 of two adjacent flabellums 111, and described air outlet 111b is defined jointly by the second end 1112 of two adjacent flabellums 111.

Described first end 1111 common definition one first pitch circle 12, and this first pitch circle 12 intersects tangential direction with this first end 1111 and has one first tangent line 13, this flabellum 111 defines a flabellum center line 1113, this flabellum center line 1113 intersects tangential direction with this first end 1111 and has one second tangent line 14, and this second tangent line 14 intersects with this first tangent line 13 and jointly defines an air inlet angle 15.

Described second end 1112 common definition one second pitch circle 16, and this second pitch circle 16 intersects tangential direction with this second end 1112 and has one the 3rd tangent line 17, this flabellum center line 1113 intersects tangential direction with this second end 1112 and has one the 4th tangent line 18,3rd tangent line 17 intersects with the 4th tangent line 18 and jointly defines an air-out angle 19, the width because of described second end 1112 of the present embodiment is unequal, meaning flabellum 111 alternative rings different for two width around being arranged at 11 weeks edges of this wheel hub, making described air outlet 111b is Unequal distance.

Refer to Fig. 3, top view for centrifugal fan impeller structure second embodiment of the present invention, as shown in the figure, the present embodiment part-structure is identical with aforementioned first embodiment therefore will not be described in great detail at this, only the present embodiment is unequal for the angle at described air-out angle 19 with not existing together of aforementioned first embodiment, mean that at least two flabellums 111 air-out angle 19 each other differs, also can be by flabellum 111 alternative rings different for two air-out angles 19 around being arranged at 11 weeks edges of this wheel hub.

Refer to Fig. 4, top view for centrifugal fan impeller structure the 3rd embodiment of the present invention, as shown in the figure, the present embodiment part-structure is identical with aforementioned first embodiment therefore will not be described in great detail at this, and only the present embodiment is unequal with the length of other flabellums 111 at least one flabellum 111 in described flabellum 111 with not existing together of aforementioned first embodiment.

Claims

1. a centrifugal fan impeller structure, it is characterised in that comprise:

One wheel hub, has multiple flabellum and is extended institute's configuration by this wheel hub week along the direction to this wheel hub contrary, There is between described flabellum a runner and an air outlet and an air intake vent, described air outlet and this air intake vent set up separately In these runner two ends, and being connected with this runner, described air outlet is non-equidistant placement；

Wherein, described flabellum has one first end and one second end, and this air intake vent is by the of two adjacent flabellums One end is defined jointly, and described air outlet is defined jointly by the second end of two adjacent flabellums；Described second end Width is unequal；Described first end common definition one first pitch circle, and this first pitch circle and this first end phase Tangential line direction has one first tangent line, and this flabellum defines a flabellum center line, this flabellum center line with this first End intersects tangential direction and has one second tangent line, and this second tangent line intersects with this first tangent line and jointly defines One air inlet angle；Described second end common definition one second pitch circle, and this second pitch circle intersects with this second end Tangential direction has one the 3rd tangent line, and this flabellum defines a flabellum center line, this flabellum center line and this second end Crossing tangential direction has one the 4th tangent line, and the 3rd tangent line intersects with the 4th tangent line and jointly defines one Air-out angle, the angle at described air-out angle is unequal.

2. centrifugal fan impeller structure as claimed in claim 1, it is characterised in that in described flabellum at least Flabellum is unequal with the length of other flabellums.