CN215949927U

CN215949927U - Boiler induced draft fan impeller

Info

Publication number: CN215949927U
Application number: CN202122334016.4U
Authority: CN
Inventors: 刘国青
Original assignee: Renqiu Kaibai Electromechanical Equipment Co ltd
Current assignee: Renqiu Kaibai Electromechanical Equipment Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-03-04
Anticipated expiration: 2031-09-26

Abstract

The utility model discloses an impeller of a boiler induced draft fan, which sequentially comprises an upper wheel disc pressure ring, blades and a wheel disc from top to bottom; square holes are formed in the surfaces of the upper wheel disc pressure ring and the wheel disc; the blade is a right-angle trapezoid with the upper side shorter than the lower side, and N cards which are symmetrically distributed are arranged on the upper side and the lower side of the blade; the card and the blade are integrally formed. The middle part of the wheel disc is provided with a shaft disc; the shaft disc is fixed on the wheel disc through rivets; the middle part of the shaft disc is provided with a jackscrew. The utility model has the beneficial effects that: simple structure, simple to operate saves the manual work, saves the cost, and firm safety supports firmly, non-deformable, long service life, the amount of wind is big, and the noise is low.

Description

Boiler induced draft fan impeller

Technical Field

The utility model relates to the field of boiler induced draft fans, in particular to an impeller of a boiler induced draft fan.

Background

The boiler induced draft fan is a driven fluid machine which increases the gas pressure and discharges the gas by means of the mechanical energy input by the motor. At present, impellers used on boilers, particularly biomass boilers and coal-fired boilers, are all manufactured by a welding and paint spraying process, and are welded at high temperature, so that the impellers have certain heat, are deformed due to internal stress of steel plates, further deflect the impellers, and are often subjected to cold joint and open joint, so that mechanical failure is caused; in addition, the blades on the traditional impeller are all inclined, so that dust is easy to accumulate; the air quantity is small, and the noise is large; bringing great inconvenience to the use.

Disclosure of Invention

In order to solve the problems, the utility model provides an impeller of a boiler induced draft fan.

The technical scheme of the utility model is as follows: an impeller of a boiler induced draft fan comprises an upper wheel disc pressure ring, blades and a wheel disc from top to bottom in sequence;

square holes are formed in the surfaces of the upper wheel disc pressure ring and the wheel disc;

the blade is a right-angle trapezoid with the upper side shorter than the lower side, and N cards which are symmetrically distributed are arranged on the upper side and the lower side of the blade; the card and the blade are integrally formed.

The middle part of the wheel disc is provided with a shaft disc; the shaft disc is fixed on the wheel disc through rivets; the middle part of the shaft disc is provided with a jackscrew.

The blade is a one-piece straight blade; the number of the blades is N; the blade is a galvanized sheet blade.

The blades pass through the card inserting holes and bend the cards by 90 degrees and are respectively fixed on the upper wheel disc pressure ring and the wheel disc.

The blades are respectively connected with the upper wheel disc pressure ring and the wheel disc; and is arranged perpendicular to and forward of the reel of the wheel disc.

Compared with the prior art, the utility model has the beneficial effects that: simple structure, simple to operate saves the manual work, saves the cost, and firm safety supports firmly, non-deformable, long service life, the amount of wind is big, and the noise is low.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a schematic view of a blade according to the present invention.

FIG. 3 is a top view of the present invention.

Fig. 4 is a bottom view of the present invention.

Fig. 5 is a schematic structural view of the upper disk pressure ring of the present invention.

In the figure: 1. an upper wheel disc compression ring; 2. a blade; 21. a card; 3. a wheel disc; 4. a reel; 5, a hole; 6. riveting; 7. and (5) jacking the screw.

Detailed Description

Examples

An impeller of a boiler induced draft fan comprises an upper wheel disc compression ring 1, blades 2 and a wheel disc 3 from top to bottom in sequence;

square holes 5 are formed in the surfaces of the upper wheel disc compression ring 1 and the wheel disc 3;

the blade 2 is a right trapezoid with a short upper side and a long lower side, and N cards 21 are symmetrically distributed on the upper side and the lower side of the blade 2; the card 21 is formed integrally with the blade 2.

The middle part of the wheel disc 3 is provided with a shaft disc 4; the shaft disc 4 is fixed on the wheel disc 3 through a rivet 6; the middle part of the shaft disc 4 is provided with a jackscrew 7.

The blade 2 is a one-piece straight blade; the number of the blades is N; the blade 2 is a galvanized sheet blade.

The blade 2 is inserted into the hole 5 through the card 21 and the card is bent by 90 degrees and is respectively fixed on the upper wheel disc pressing ring 1 and the wheel disc 3.

The blades 2 are respectively connected with the upper wheel disc compression ring 1 and the wheel disc 3; and is arranged perpendicular to and forward of the reel of the wheel disc 3.

When the fixing device is used, the cards 21 on the blades 2 are respectively inserted into the wheel disc and the holes 5 formed in the upper wheel disc pressing ring 1, and the cards 21 are bent in the same direction by a machine to be fixed.

For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. The utility model provides a boiler draught fan impeller which characterized in that: the device sequentially comprises an upper wheel disc pressure ring (1), blades (2) and a wheel disc (3) from top to bottom;

the surfaces of the upper wheel disc compression ring (1) and the wheel disc (3) are provided with square holes (5);

the blade (2) is a right-angle trapezoid with a short upper side and a long lower side, and N cards (21) are symmetrically distributed on the upper side and the lower side of the blade (2); the card (21) and the blade (2) are integrally formed.

2. The boiler induced draft fan impeller of claim 1, wherein: the middle part of the wheel disc (3) is provided with a shaft disc (4); the shaft disc (4) is fixed on the wheel disc (3) through a rivet (6); the middle part of the shaft disc (4) is provided with a jackscrew (7).

3. The boiler induced draft fan impeller of claim 1, wherein: the blade (2) is a one-piece straight blade; the number of the blades is N; the blade (2) is a galvanized sheet blade.

4. The boiler induced draft fan impeller of claim 1, wherein: the blade (2) is inserted into the hole (5) through the card (21) and the card is bent by 90 degrees and is respectively fixed on the upper wheel disc compression ring (1) and the wheel disc (3).

5. The boiler induced draft fan impeller of claim 1, wherein: the blades (2) are respectively connected with the upper wheel disc compression ring (1) and the wheel disc (3); and is arranged vertically and positively with the shaft disc of the wheel disc (3).