CN215409401U

CN215409401U - Centrifugal impeller capable of changing air flow impact

Info

Publication number: CN215409401U
Application number: CN202120649482.9U
Authority: CN
Inventors: 刘爱瑜; 覃万翔; 刘阳明; 赵思钊
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-01-04
Anticipated expiration: 2031-03-30

Abstract

The utility model provides a can change centrifugal impeller that air current assaulted, including last impeller and lower impeller, go up the impeller and be equipped with the center disk between the impeller down, it includes a plurality of upper blades to go up the impeller, the impeller includes a plurality of lower blades down, upper blade and lower blade dislocation set, two adjacent upper blades or two adjacent central angles that lower blade is right are alpha, the contained angle of upper blade and one of them adjacent lower blade is A, the contained angle of upper blade and another adjacent lower blade is B, B ═ alpha-A, A: b is equal to Γ, and 0 < Γ < 1. Compared with the traditional centrifugal impeller with the upper and lower blade dislocation angles distributed equally, the centrifugal impeller has the advantages that the upper and lower blade dislocation angles are distributed unequally, namely the angle A is not equal to the angle B, and the change of the upper and lower blade dislocation angles changes the flow condition in the fan to a certain extent, so that the impact of airflow on the volute tongue when the airflow passes through the volute tongue is changed, the pressure gradient at the volute tongue is reduced, the flow condition at the volute tongue is improved, the flow rate of the fan is increased, and the noise is reduced.

Description

Centrifugal impeller capable of changing air flow impact

Technical Field

The utility model relates to the technical field of fans, in particular to a centrifugal impeller capable of changing airflow impact.

Background

The noise of the centrifugal impeller is mainly aerodynamic noise generated in the unstable gas flow process, as shown in fig. 4, the upper and lower blade dislocation angles D of the conventional duplex centrifugal impeller are generally 1:1, that is, the angle E is the angle F or the upper blade 11 and the lower blade 12 are aligned; the cross-flow fan blade disclosed in 2018, 1, 9 and 2018 by No. CN107559236A comprises a left end plate, a middle partition plate, a right end plate and blades, wherein a left end through hole is formed in the center of the left end plate, a step is arranged on the middle partition plate and used for being connected with a motor rotating shaft, the right end plate is of a closed plate structure, upper blades and lower blades of the cross-flow fan blade are also aligned, and when an airflow passes through a volute tongue, impact on the volute tongue is large (due to unstable flow of the air), pressure gradient at the volute tongue is large, so that the flow rate of the impeller is reduced, and noise is increased.

Therefore, further improvements are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the centrifugal impeller which is simple in structure, large in flow, low in noise and strong in practicability and can change the impact of air flow so as to overcome the defects in the prior art.

Can change centrifugal impeller that air current strikes according to this purpose design, including last impeller and lower impeller, go up and be equipped with the center between impeller and the lower impeller, go up the impeller and include a plurality of upper blades, the lower impeller includes a plurality of lower blades, and upper blade and lower blade set up the upper and lower both sides at the center respectively, its characterized in that: go up blade and under blade dislocation set, two adjacent upper leafs or two adjacent central angle that the under blade is right are alpha, and the contained angle between upper leaf and one of them adjacent under blade is A, and the contained angle between upper leaf and another adjacent under blade is B, and B is alpha-A, A: b is equal to Γ, and 0 < Γ < 1.

The number of the upper blades is the same as that of the lower blades.

The upper impeller further comprises an upper frame, one end of the upper blade is connected to the middle disc, and the other end of the upper blade is connected to the upper frame.

The lower impeller further comprises a lower frame, one end of the lower blade is connected to the middle disc, and the other end of the lower blade is connected to the lower frame.

The middle disc is provided with an installation sleeve for installing a motor shaft, and a plurality of reinforcing ribs are annularly arranged on the periphery of the installation sleeve.

The centrifugal impeller is a duplex centrifugal impeller.

Compared with the traditional centrifugal impeller with the upper and lower blade dislocation angles distributed equally, the centrifugal impeller has the advantages that the upper and lower blade dislocation angles are distributed unequally, namely the angle A is not equal to the angle B, and the change of the upper and lower blade dislocation angles changes the flow condition in the fan to a certain extent, so that the impact of airflow on the volute tongue when the airflow passes through the volute tongue is changed, the pressure gradient at the volute tongue is reduced, the flow condition at the volute tongue is improved, the flow rate of the fan is increased, and the noise is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of a centrifugal impeller according to an embodiment of the present invention.

Fig. 2 is a schematic view of the overall structure of another aspect of the centrifugal impeller according to an embodiment of the present invention.

FIG. 3 is a perspective view of a centrifugal impeller in one embodiment of the utility model.

Fig. 4 is a perspective view of a conventional centrifugal impeller.

FIG. 5 is a pressure cloud of a centrifugal impeller according to an embodiment of the present invention.

Fig. 6 is a pressure cloud of a conventional centrifugal impeller.

Detailed Description

The utility model is further described with reference to the following figures and examples.

Referring to fig. 1 to 3, the centrifugal impeller capable of changing airflow impact includes an upper impeller 1 and a lower impeller 2, a central disc 3 is disposed between the upper impeller 1 and the lower impeller 2, the upper impeller 1 includes a plurality of upper blades 4, the lower impeller 2 includes a plurality of lower blades 5, the upper blades 4 and the lower blades 5 are respectively disposed on the upper side and the lower side of the central disc 3, the upper blades 4 and the lower blades 5 are disposed in a staggered manner, a central angle (i.e., an upper blade dislocation angle and a lower blade dislocation angle) subtended by two adjacent upper blades 4 or two adjacent lower blades 5 is α, an included angle between one adjacent lower blade 5 and one upper blade 4 is a, an included angle between one adjacent lower blade 5 and one upper blade 4 is B, B is α -a, a: b is equal to Γ, and 0 < Γ < 1. The blades of the centrifugal impeller are provided with the upper and lower blade dislocation angles which are distributed unevenly, and compared with the traditional centrifugal impeller with the upper and lower blade dislocation angles which are distributed evenly, the change of the upper and lower blade dislocation angles changes the flow condition in the fan to a certain extent, thereby changing the impact of airflow on the volute tongue when the airflow passes through the volute tongue, reducing the pressure gradient at the volute tongue (as can be seen from the comparison between fig. 5 and fig. 6, the pressure gradient at the volute tongue of fig. 5 is obviously smaller than that at the volute tongue of fig. 6), improving the flow condition at the volute tongue, increasing the flow rate of the fan and reducing the noise.

The number of upper blades 4 and lower blades 5 is the same.

The upper impeller 1 also comprises an upper frame 6, one end of the upper blade 4 is connected to the middle disc 3, and the other end is connected to the upper frame 6; the lower impeller 2 further comprises a lower frame 7, one end of the lower blade 5 is connected to the central disc 3, and the other end of the lower blade is connected to the lower frame 7. The frame can fix a position each blade, effectively improves the bulk strength of impeller.

Be equipped with the installation cover 8 that is used for installing the motor shaft on the central disk 3, the week side ring shape of installation cover 8 is provided with a plurality of reinforcement muscle 9, and reinforcement muscle 9 can make the structure of installation cover 8 more firm, damages installation cover 8 when preventing the motor shaft rotation.

The centrifugal impeller is a duplex centrifugal impeller.

The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the utility model are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, and the utility model is intended to be protected by the following claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a can change centrifugal impeller that air current strikes, includes impeller (1) and lower impeller (2), go up and be equipped with well dish (3) between impeller (1) and lower impeller (2), go up impeller (1) and include a plurality of upper vanes (4), lower impeller (2) include a plurality of lower blades (5), and upper vanes (4) set up the upper and lower both sides in well dish (3) respectively with lower blade (5), its characterized in that: go up blade (4) and lower blade (5) dislocation set, two adjacent upper blades (4) or two adjacent lower blade (5) central angle to be alpha, the contained angle between upper blade (4) and one of them adjacent lower blade (5) is A, the contained angle between upper blade (4) and another adjacent lower blade (5) is B, B is alpha-A, A: b is equal to Γ, and 0 < Γ < 1.

2. The centrifugal impeller capable of modifying the impingement of an air stream as described in claim 1, wherein: the number of the upper blades (4) is the same as that of the lower blades (5).

3. The centrifugal impeller capable of modifying the impingement of an air stream as described in claim 2, wherein: the upper impeller (1) further comprises an upper frame (6), one end of the upper blade (4) is connected to the middle disc (3), and the other end of the upper blade is connected to the upper frame (6).

4. The centrifugal impeller capable of modifying the impingement of an air stream as described in claim 3, wherein: the lower impeller (2) further comprises a lower frame (7), one end of the lower blade (5) is connected to the middle disc (3), and the other end of the lower blade is connected to the lower frame (7).

5. The centrifugal impeller capable of modifying the impingement of an airflow in accordance with claim 4, wherein: the motor shaft reinforcing device is characterized in that an installation sleeve (8) used for installing a motor shaft is arranged on the middle disc (3), and a plurality of reinforcing ribs (9) are annularly arranged on the periphery of the installation sleeve (8).

6. The centrifugal impeller capable of modifying air flow impingement according to any one of claims 1-5, wherein: the centrifugal impeller is a duplex centrifugal impeller.