CN211525179U

CN211525179U - Backward centrifugal impeller and fan applying same

Info

Publication number: CN211525179U
Application number: CN201922184184.2U
Authority: CN
Inventors: 徐海明
Original assignee: Zhongshan Yibisi Technology Co ltd
Current assignee: Zhongshan Yibisi Technology Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-18
Anticipated expiration: 2029-12-09
Also published as: WO2021114527A1

Abstract

The utility model discloses a fan to centrifugal impeller and use it behind, the rear to centrifugal impeller include a plurality of blades of preceding wind dish, back wind dish and erection joint between preceding wind dish and back wind dish, set up the air intake in the middle of the preceding wind dish, form the wind channel between the two adjacent blades, the blade include the trailing edge that is close to the leading edge of air intake and is located the air outlet department in wind channel, its characterized in that: the curved shape of the leading edge is a wavy curve which has poor dynamic performance and low noise characteristics.

Description

Backward centrifugal impeller and fan applying same

The technical field is as follows:

the utility model relates to a fan to centrifugal impeller and use it behind.

Background art:

referring to fig. 1, 2 and 3, a wind wheel structure used by a current fan includes a front wind disk a1, a rear wind disk a2 and a plurality of blades a3 installed and connected between the front wind disk a1 and the rear wind disk a2, an air inlet a4 is arranged in the middle of the front wind disk a1, an air duct a5 is formed between two adjacent blades a3, the blades a3 include a front edge a31 close to the air inlet a4 and a rear edge a32 at an air outlet of the air duct a5, and the front edge a31 is a smooth curved line which is arched, and this line type results in poor aerodynamic performance and high noise.

The invention content is as follows:

the utility model aims at providing a to centrifugal impeller and use its fan behind, solve among the prior art to the structure of centrifugal impeller lead to the technical problem that pneumatic performance is poor, the noise is great.

The purpose of the utility model is realized by the following technical scheme.

The utility model provides a backward centrifugal impeller, includes preceding wind dish, back wind dish and a plurality of blades of erection joint between preceding wind dish and back wind dish, set up the air intake in the middle of the preceding wind dish, form the wind channel between two adjacent blades, the blade include the trailing edge that is close to the leading edge of air intake and is located the air outlet department in wind channel, its characterized in that: the curve shape of the leading edge is a wavy curve.

The curve of the wave 1 comprises 2 wave crests and a wave trough, and the wave trough is positioned between the 2 wave crests.

The vertical distance H1 between the valley center O and the leading edge apex A is greater than the vertical distance H2 between the valley center O and the leading edge lowest point B.

H1>2H2 as described above.

The rear edge is provided with a plurality of cut grooves.

Adjacent 2 grooves in the plurality of cut grooves are spaced at a distance from each other, and a wavy layout with alternate concave and convex is formed on the rear edge.

The plurality of cut grooves are arranged from the top of the rear edge, and no groove is arranged at the bottom of the rear edge.

The top of the rear edge is uniformly provided with 4 grooves.

The utility model provides a fan, includes spiral case, centrifugal impeller and motor, and centrifugal impeller installs inside the spiral case, and the motor is installed at the spiral case and is driven centrifugal impeller and rotate its characterized in that: the centrifugal impeller is the above-described backward centrifugal impeller.

Compared with the prior art, the utility model, following effect has:

1) the utility model discloses the curve shape of the front edge to centrifugal impeller is the wave curve, can improve aerodynamic performance difference and noise reduction by a wide margin, and through experimental test and computer simulation test, the curve of the front edge after the improvement has good dynamic performance difference and low noise characteristic.

2) Other advantages of the invention are described in detail in the description of the embodiments.

Description of the drawings:

FIG. 1 is a perspective view of a prior art backward centrifugal impeller;

FIG. 2 is a top view of a prior art backward centrifugal impeller;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a perspective view of an angle of the present invention;

fig. 5 is a perspective view of another angle of the present invention;

fig. 6 is an exploded view of the present invention;

fig. 7 is a perspective view of a blade of the present invention;

fig. 8 is a front view of the blade of the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the following detailed description of preferred embodiments and accompanying drawings.

The first embodiment is as follows:

as shown in fig. 4 to 8, the present embodiment is a backward centrifugal impeller, which includes a front wind disk 1, a rear wind disk 2 and a plurality of blades 3 installed and connected between the front wind disk 1 and the rear wind disk 2, an air inlet 11 is disposed in the middle of the front wind disk 1, an air duct 33 is formed between two adjacent blades 3, each blade 3 includes a front edge 31 close to the air inlet 11 and a rear edge 32 located at an air outlet of the air duct 33, and the backward centrifugal impeller is characterized in that: the curve shape of the leading edge 31 is a wavy curve. The utility model discloses the curve shape of the front edge to centrifugal impeller is the wave curve, can improve aerodynamic performance difference and noise reduction by a wide margin, and through experimental test and computer simulation test, the curve of the front edge after the improvement has good dynamic performance difference and low noise characteristic. In fig. 8, the curve of the leading edge 31 viewed from the line connecting AB to the upper right forms a wavy curve.

The wave curve comprises 2 wave crests 312 and a wave trough 311, the wave trough 311 is positioned between the 2 wave crests 312, the curve shape of the front edge is concise, and the aerodynamic performance is good.

The vertical distance H1 between the center O of the trough 311 and the top A of the front edge 31 is greater than the vertical distance H2 between the center O of the trough 311 and the bottom B of the front edge 31, and the curve shape of the front edge is more reasonable in design layout than H1>2H2, so that the aerodynamic performance can be further improved, and the noise can be reduced.

The rear edge 32 is provided with a plurality of cut grooves 321, and adjacent 2 grooves 321 in the plurality of cut grooves 321 are spaced at a distance from each other, so that a wavy layout with alternate concave and convex is formed on the rear edge 32. Noise can be reduced, wind speed flowing over the trailing edge is closer, and aerodynamic performance is better.

The plurality of cut grooves 321 are arranged from the top of the rear edge 32, the grooves 321 are not arranged at the bottom of the rear edge 32, and 4 grooves 321 are uniformly arranged at the top of the rear edge 32. The wind speed is more uniform by reducing noise, and the pneumatic performance is better.

Example two:

this embodiment provides a fan, including spiral case, centrifugal impeller and motor, centrifugal impeller installs inside the spiral case, and the motor is installed at the spiral case and is driven centrifugal impeller and rotate its characterized in that: the centrifugal impeller is a backward centrifugal impeller described in the first embodiment. It has good dynamic performance and low noise characteristics.

The above embodiments are only preferred embodiments of the present invention, but the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, simplifications, which are made without departing from the spirit and principle of the present invention, are all equivalent replacements within the protection scope of the present invention.

Claims

1. The utility model provides a backward centrifugal impeller, includes preceding wind dish, back wind dish and a plurality of blades of erection joint between preceding wind dish and back wind dish, set up the air intake in the middle of the preceding wind dish, form the wind channel between two adjacent blades, the blade include the trailing edge that is close to the leading edge of air intake and is located the air outlet department in wind channel, its characterized in that: the curve shape of the leading edge is a wavy curve.

2. A backward centrifugal impeller according to claim 1, wherein: the wave curve comprises 2 wave crests and a trough, and the trough is located between the 2 wave crests.

3. A backward centrifugal impeller according to claim 2, wherein: the vertical distance H1 between the valley center O and the leading edge apex A is greater than the vertical distance H2 between the valley center O and the leading edge nadir B.

4. A backward centrifugal impeller according to claim 3, wherein: h1>2H 2.

5. A backward centrifugal impeller according to claim 1 or 2 or 3 or 4, wherein: the rear edge is provided with a plurality of cut grooves.

6. A backward centrifugal impeller according to claim 5, wherein: adjacent 2 grooves in the plurality of cut grooves are spaced at a distance from each other, and a wavy layout with alternate concave and convex is formed on the rear edge.

7. A backward centrifugal impeller according to claim 6, wherein: the plurality of cut grooves are arranged from the top of the rear edge, and no groove is arranged at the bottom of the rear edge.

8. A backward centrifugal impeller according to claim 7, wherein: the top of the rear edge is uniformly provided with 4 grooves.

9. The utility model provides a fan, includes spiral case, centrifugal impeller and motor, and centrifugal impeller installs inside the spiral case, and the motor is installed at the spiral case and is driven centrifugal impeller and rotate its characterized in that: the centrifugal impeller is a backward centrifugal impeller according to any one of claims 1 to 8.