CN202811503U

CN202811503U - Centrifuging fan blade structure

Info

Publication number: CN202811503U
Application number: CN 201220534912
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: 2013-03-20
Anticipated expiration: 2022-10-18

Abstract

A centrifuging fan blade structure comprises a wheel hub and a fan blade body group. The wheel hub is provided with an extending portion, the fan blade body group is provided with a plurality of fan blade bodies, and the fan blade bodies are formed by the extending out of the extending portion. A flow pass, an air outlet and an air inlet are arranged between the fan blade bodies, and the air outlet and the air outlet are respectively arranged at two ends of the flow pass and communicated with the flow pass. The air outlets are arranged in a non-isometry mode with each other, and running noise can be greatly reduced due to the non-isometry arrangement of the air outlets.

Description

The centrifugal fan impeller structure

Technical field

A kind of centrifugal fan impeller structure, espespecially a kind of centrifugal fan impeller structure that reduces the noise in centrifugal fan when running.

Background technique

Existing electronic industry develops rapidly, the performance of electronic component constantly promotes, along with the faster heat that it produces of arithmetic speed then can produce larger heat relatively, if can't the instant discharge of this heat is analgesic, then this electronic component operation efficiency then can reduce, severe patient then can cause and burn, so in limited system space by small-sized centrifugal cutter as analgesic use, this centrifugal cutter consists predominantly of a framework, one fan hub, and a plurality of flabellum bodies that are located on this fan hub outside, its top of this framework and below respectively have respectively an intake grill, its side has an exhaust outlet, when running, then rotarily drive surrounding atmosphere by described flabellum body and flow, will circulate to behind the radial air flow of this fan hub, being discharged by exhaust outlet from the axial device that intake grill enters.

During the centrifugal cutter running, because flowing out inhomogeneous wake flow (non-uniform wake), impeller follow the interaction effect of the tip of the tongue will produce noise, and when the gap of impeller and the tip of the tongue is narrow, noise is subject to wake flow and causes to get the tip of the tongue concussion tongue oscillations in impact and near the pressure difference the tip of the tongue of the tip of the tongue) impact, when the gap reach impeller radius 20% the time, main noise source is the impact of surplus wake flow only, and very little.The blade (Short vane) that increases in addition 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; So known technology has following shortcoming:

1. structural design is limited;

2. can't be according to the characteristic flexible design;

3. noise is large.

The model utility content

For this reason, for solving the shortcoming of above-mentioned known technology, main purpose of the present utility model provides a kind of centrifugal fan impeller structure that reduces noise that has.

In order to achieve the above object, the utility model provides a kind of centrifugal fan impeller structure, comprises: a wheel hub, a flabellum body group;

Described wheel hub has an extension part; Described flabellum body group has a plurality of flabellum bodies, described flabellum body is by this extension part institute's configuration that stretches out, have a runner and an exhaust outlet and a wind inlet between described flabellum body, described exhaust outlet and this wind inlet are divided into this runner two ends, and be connected with this runner, described exhaust outlet is non-equidistant setting.

Particularly, the utility model provides a kind of centrifugal fan impeller structure, comprises: a wheel hub has an extension part; One flabellum body group, have a plurality of flabellum bodies, described flabellum body is by this extension part institute's configuration that stretches out, have a runner and an exhaust outlet and a wind inlet between described flabellum body, described exhaust outlet and this wind inlet are divided into this runner two ends, and be connected with this runner, described exhaust outlet is non-equidistant setting.

Preferably, described centrifugal fan impeller structure, described flabellum body have a first end and one second end, and this wind inlet is defined jointly by the first end of two adjacent flabellum bodies, and described exhaust outlet is defined jointly by the second end of two adjacent flabellum bodies.

Preferably, described centrifugal fan impeller structure, the width of described the second end is unequal.

Preferably, described centrifugal fan impeller structure, the common definition of described first end one first pitch circle, and this first pitch circle and this first end intersect tangent direction and have one first tangent line, this flabellum body defines a flabellum body center line, this flabellum body center line and this first end intersect tangent direction and have one second tangent line, the crossing air inlet angle that also jointly defines of this second tangent line and this first tangent line.

Preferably, described centrifugal fan impeller structure, the common definition of described the second end one second pitch circle, and this second pitch circle and this second end intersect tangent direction and have one the 3rd tangent line, this flabellum body defines a flabellum body center line, this flabellum body center line and this second end intersect tangent direction and have one the 4th tangent line, and the 3rd tangent line and the 4th tangent line intersect and jointly define an air-out angle, and the angle at described air-out angle is unequal.

Preferably, described centrifugal fan impeller structure, the length of at least one flabellum body and other flabellum bodies is unequal in the described flabellum body.

Exhaust outlet by the flabellum body group is selected with the different spacing setting, can reduce flabellum by the single-tone of tongue mouth (BPF), and can increase (BPF) frequency, and reduce the acoustic pressure weighted volumes and significantly reduce noise, and can be according to boundary conditions flexible design blade structure.

Description of drawings

Fig. 1 is centrifugal fan impeller structure the first embodiment's of the present utility model stereogram;

Fig. 2 is centrifugal fan impeller structure the first embodiment's of the present utility model plan view;

Fig. 3 is centrifugal fan impeller structure the second embodiment's of the present utility model plan view;

Fig. 4 is centrifugal fan impeller structure the second embodiment's of the present utility model plan view.

The primary component symbol description

Centrifugal fan impeller structure 1

Wheel hub 11

Extension part 111

Flabellum body group 12

Flabellum body 121

Runner 121a

Exhaust outlet 121b

Wind inlet 121c

First end 1211

The second end 1212

Flabellum body center line 1213

The first pitch circle 13

The first tangent line 14

The second tangent line 15

Air inlet angle 16

The second pitch circle 17

The 3rd tangent line 18

The 4th tangent line 19

Air-out angle 20

Embodiment

Characteristic on above-mentioned purpose of the present utility model and structure thereof and the function will be explained according to appended graphic preferred embodiment.

See also Fig. 1, Fig. 2, be centrifugal fan impeller structure the first embodiment's of the present utility model solid and plan view, as shown in the figure, described centrifugal fan impeller structure 1 comprises: a wheel hub 11, a flabellum body group 12;

Described wheel hub 11 has an extension part 111;

Described flabellum body group 12 has a plurality of flabellum bodies 121, described flabellum body 121 is by this extension part 111 institute's configuration that stretches out, 121 of described flabellum bodies have a runner 121a and an exhaust outlet 121b and a wind inlet 121c, described exhaust outlet 121b and this wind inlet 121c are divided into this runner 121a two ends, and 121a is connected with this runner, and described exhaust outlet 121b is non-equidistant setting.

Described flabellum body 121 has a first end 1211 and one second end 1212, and this wind inlet 121c is defined jointly by the first end 1211 of two adjacent flabellum bodies 121, and described exhaust outlet 121b is defined jointly by the second end 1212 of two adjacent flabellum bodies 121.

Described first end 1211 common definition one first pitch circles 13, and this first pitch circle 13 has one first tangent line 14 with these first end 1211 crossing tangent directions, this flabellum body 121 definition one flabellum body center line 1213, this flabellum body center line 1213 intersects tangent direction with this first end 1211 and has one second tangent line 15, this second tangent line 15 and these first tangent line, 14 crossing air inlet angles 16 that also jointly define.

Described the second end 1212 common definition one second pitch circles 17, and this second pitch circle 17 has one the 3rd tangent line 18 with these second end, 1212 crossing tangent directions, this flabellum body center line 1213 intersects tangent direction with this second end 1212 and has one the 4th tangent line 19, the 3rd tangent line 18 and the 4th tangent line 19 crossing air-out angles 20 of also jointly defining, the width because of described the second end 1212 of present embodiment is unequal, mean the extension part 111 that the flabellum body that two width are different 121 alternative ring windings place this wheel hub 11, make described exhaust outlet 121b be not equidistant.

See also Fig. 3, plan view for centrifugal fan impeller structure the second embodiment of the present utility model, as shown in the figure, the present embodiment part-structure is identical with aforementioned the first embodiment so will repeat no more at this, only present embodiment and aforementioned the first embodiment do not exist together for the angle at described air-out angle 20 unequal, it is not identical to mean at least two flabellum bodies 121 air-out angle 20 each other, also the 20 different flabellum body 121 alternative ring windings of two air-out angles can be placed the extension part 111 of this wheel hub 11.

See also Fig. 4, plan view for centrifugal fan impeller structure the 3rd embodiment of the present utility model, as shown in the figure, the present embodiment part-structure is identical with aforementioned the first embodiment so will repeat no more at this, only present embodiment and aforementioned the first embodiment do not exist together for the length of at least one flabellum body 121 and other flabellum bodies 121 in the described flabellum body 121 unequal.

Claims

1. a centrifugal fan impeller structure is characterized in that, comprises:

One wheel hub has an extension part;

One flabellum body group, have a plurality of flabellum bodies, described flabellum body is by this extension part institute's configuration that stretches out, have a runner and an exhaust outlet and a wind inlet between described flabellum body, described exhaust outlet and this wind inlet are divided into this runner two ends, and be connected with this runner, described exhaust outlet is non-equidistant setting.

2. centrifugal fan impeller structure as claimed in claim 1 is characterized in that, described flabellum body has a first end and one second end, and this wind inlet is defined jointly by the first end of two adjacent flabellum bodies, and described exhaust outlet is defined jointly by the second end of two adjacent flabellum bodies.

3. centrifugal fan impeller structure as claimed in claim 2 is characterized in that, the width of described the second end is unequal.

4. centrifugal fan impeller structure as claimed in claim 2, it is characterized in that, the common definition of described first end one first pitch circle, and this first pitch circle and this first end intersect tangent direction and have one first tangent line, this flabellum body defines a flabellum body center line, this flabellum body center line and this first end intersect tangent direction and have one second tangent line, the crossing air inlet angle that also jointly defines of this second tangent line and this first tangent line.

5. centrifugal fan impeller structure as claimed in claim 2, it is characterized in that, the common definition of described the second end one second pitch circle, and this second pitch circle and this second end intersect tangent direction and have one the 3rd tangent line, this flabellum body defines a flabellum body center line, this flabellum body center line and this second end intersect tangent direction and have one the 4th tangent line, and the 3rd tangent line and the 4th tangent line intersect and jointly define an air-out angle, and the angle at described air-out angle is unequal.

6. centrifugal fan impeller structure as claimed in claim 1 is characterized in that, the length of at least one flabellum body and other flabellum bodies is unequal in the described flabellum body.