CN213392844U

CN213392844U - Centrifugal fan impeller

Info

Publication number: CN213392844U
Application number: CN202022041067.3U
Authority: CN
Inventors: 褥星云
Original assignee: Foshan Zhengzhou Environmental Protection Ventilation Equipment Co ltd
Current assignee: Guangdong Zhengzhou Environmental Protection Technology Co.,Ltd.
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-06-08
Anticipated expiration: 2030-09-17

Abstract

The utility model discloses a centrifugal fan impeller, which belongs to the technical field of centrifugal fans and comprises a front cover plate, a rear cover plate and a plurality of groups of blades, wherein the central position of the front cover plate is provided with an air inlet, the central position of the rear cover plate is provided with a shaft hole, the blades are circumferentially arranged around the shaft hole, the upper end and the lower end of each blade are respectively embedded into the front cover plate and the rear cover plate, the projection in the vertical direction of each blade is arc-shaped, one side of each blade, which is close to the shaft hole, is provided with an extension part extending to one side of the shaft hole, the extension part is triangular, a guide part protruding towards the direction of the air inlet is arranged above the extension part, the guide part extends into the air inlet, the flow guiding capacity of the blades to gas is improved through the extension part and the guide part, the gas is pushed to flow to one side of a blade, the conveying capacity of the blade is improved.

Description

Centrifugal fan impeller

Technical Field

The utility model relates to a centrifugal fan technical field, in particular to centrifugal fan impeller.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and the centrifugal fan drives external gas to flow to the air inlet by forming negative pressure at the air inlet. When the air volume needs to be adjusted, the existing centrifugal fan is mostly realized by increasing the rotating speed, the power consumption and the noise of the centrifugal fan can be synchronously increased, and the key for improving the performance of the centrifugal fan is to improve the negative pressure at an air inlet and the flow guiding capacity of blades under the state that the rotating speed is not improved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects existing in the prior art, the utility model provides a centrifugal fan impeller.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a centrifugal fan impeller, includes front shroud, back shroud and multiunit blade, front shroud central point puts and is equipped with the air intake, and back shroud central point puts and is equipped with the shaft hole, the blade encircles shaft hole circumference and sets up to on front shroud and the back shroud were embedded into respectively at both ends about the blade, the projection of blade vertical direction is the arc, and the blade is close to shaft hole one side and is equipped with the extension portion that extends to shaft hole one side, and the extension portion is triangle-shaped, and the extension portion top is equipped with to the convex guide part of air intake direction, and the guide part extends to in the air intake.

Preferably, the wrap angle of the blade is 50-55 degrees.

Preferably, the blade inlet angle is 20-25 degrees, and the blade outlet angle is 40-45 degrees.

Preferably, a guide passage is formed between the blades, and the width ratio of the front end of the guide passage to the rear end of the guide passage is 1 to 2.

Preferably, a rounded corner is arranged above the guide part.

Preferably, the top and the bottom of the blade are both provided with embedded parts, the front cover plate and the rear cover plate are provided with embedded grooves matched with the embedded parts, and the top and the bottom of the blade are embedded into the front cover plate and the rear cover plate respectively through the embedded parts.

The utility model has the advantages that: improve the guide capacity of blade to gas through extension portion and guide portion, promote gas to flow to blade main part one side at the impeller rotation in-process to under the condition of same rotational speed, improve the negative pressure of air intake department, through controlling blade inlet angle and blade outlet angle, improve the carrying capacity of blade in addition.

Drawings

Fig. 1 is a front view of an embodiment of the present invention;

fig. 2 is a perspective schematic view of an embodiment of the present invention;

FIG. 3 is a perspective view of a blade according to an embodiment of the present invention;

fig. 4 is a top view of an embodiment of the present invention (with the front cover plate omitted).

In the figure, the air guide device comprises a front cover plate 1, a front cover plate 2, an air inlet 3, a rear cover plate 4, an axle hole 5, a blade 6, an extension part 7, a guide part 8 and a guide channel.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in the attached figures 1-4, the centrifugal fan impeller provided by the utility model comprises a front cover plate 1, a rear cover plate 3 and a plurality of groups of blades 5, wherein the central position of the front cover plate 1 is provided with an air inlet 2, the central position of the rear cover plate 3 is provided with a shaft hole 4, the blades 5 are circumferentially arranged around the shaft hole 4, the upper end and the lower end of each blade 5 are respectively embedded into the front cover plate 1 and the rear cover plate 3, the projection of the vertical direction of each blade 5 is arc, one side of each blade 5, which is close to the shaft hole 4, is provided with an extension part 6 which extends towards one side of the shaft hole 4, the extension part 6 is triangular, a guide part 7 which protrudes towards the air inlet 2 is arranged above the extension part 6, a fillet is arranged above the guide part 7, the guide part 7 extends into the air inlet 2, the wrap angle phi of each blade 5 is 53 degrees, the inlet angle beta 1, the width d1 of diversion channel 8 front end is 1 than 2 with the width d2 of diversion channel 8 rear end, improve the conductivity of blade 5 to gas through extension 6 and guide part 7, promote gaseous to flow to blade 5 main part one side in the impeller rotation process, thereby under the condition of the same rotational speed, improve the negative pressure of air intake 2 department, in addition through control blade 5 entrance angle and blade 5 exit angle, improve the conveying capacity of blade 5, blade 5 top and bottom all are equipped with the embedding part, be equipped with on front shroud 1 and the back shroud 3 with embedding part complex caulking groove, blade 5 top and bottom are respectively through embedding part embedding on front shroud 1 and back shroud 3, through embedding part and caulking groove, improve the convenience and the steadiness of blade 5 installation.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. A centrifugal fan impeller characterized in that: including front shroud (1), back shroud (3) and multiunit blade (5), front shroud (1) central point puts and is equipped with air intake (2), and back shroud (3) central point puts and is equipped with shaft hole (4), blade (5) encircle shaft hole (4) circumference and set up to on front shroud (1) and back shroud (3) were embedded into respectively at both ends about blade (5), the projection of blade (5) vertical direction is the arc, and blade (5) are close to shaft hole (4) one side and are equipped with epitaxial portion (6) that extend to shaft hole (4) one side, and epitaxial portion (6) are triangle-shaped, and epitaxial portion (6) top is equipped with to convex guide portion (7) of air intake (2) direction, and guide portion (7) extend to in air intake (2).

2. The centrifugal fan impeller of claim 1, wherein: the wrap angle of the blade (5) is 50-55 degrees.

3. The centrifugal fan impeller of claim 1, wherein: the inlet angle of the blade (5) is 20-25 degrees, and the outlet angle of the blade (5) is 40-45 degrees.

4. The centrifugal fan impeller of claim 1, wherein: a flow guide channel (8) is formed between the blades (5), and the ratio of the width of the front end of the flow guide channel (8) to the width of the rear end of the flow guide channel (8) is 1 to 2.

5. The centrifugal fan impeller of claim 1, wherein: a fillet is arranged above the guide part (7).

6. The centrifugal fan impeller of claim 1, wherein: blade (5) top and bottom all are equipped with the embedding part, are equipped with on front shroud (1) and back shroud (3) with embedding part complex caulking groove, on blade (5) top and bottom are respectively through embedding part embedding front shroud (1) and back shroud (3).