CN213270465U

CN213270465U - Fan pipe for axial flow fan

Info

Publication number: CN213270465U
Application number: CN202022147391.3U
Authority: CN
Inventors: 马强
Original assignee: Shanghai Walker General Equipment Co ltd
Current assignee: Shanghai Walker General Equipment Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-05-25
Anticipated expiration: 2030-09-25

Abstract

The application discloses fan pipe for axial fan relates to fan technical field, and it is including installing the fan pipe on axial fan, the shaping has the fan runner in the fan pipe, fan runner and axial fan's air outlet intercommunication, the fan runner is from the one end that is close to axial fan air outlet to the one end of keeping away from axial fan air outlet shrink gradually, the one end that axial fan air outlet was kept away from to the fan runner is provided with the diffusion tube, the internal diameter of diffusion tube is from one side that is close to the fan runner to one side of keeping away from the fan runner crescent, just install the pressure components in the fan runner. This application has the loss when reducing gaseous outflow axial fan, improves axial fan work efficiency's effect.

Description

Fan pipe for axial flow fan

Technical Field

The application relates to the technical field of fans, in particular to a fan pipe for an axial flow fan.

Background

The axial flow fan is generally used in occasions with higher flow requirement and lower pressure requirement, and the axial flow fan is commonly used in the industry to increase the air supply quantity of a combustion chamber so as to support combustion of fuel in the combustion chamber.

In the prior art, an air outlet of an axial flow fan is communicated with a combustion chamber, the axial flow fan works to suck external gas into a combustion chamber, and therefore the combustion-supporting effect is achieved.

In view of the above-mentioned related art, the inventor believes that there is a defect that the dynamic pressure of the air flow output by the axial flow fan is large, thereby causing a large loss when the air flows out of the axial flow fan.

SUMMERY OF THE UTILITY MODEL

In order to reduce the loss of gaseous outflow axial fan time, improve axial fan's work efficiency, this application provides a fan pipe for axial fan.

The application provides a fan pipe for axial fan adopts following technical scheme: the utility model provides a fan pipe for axial fan, is including installing the fan pipe on axial fan, the shaping has the fan runner in the fan pipe, the fan runner communicates with axial fan's air outlet, the fan runner is from the one end that is close to axial fan air outlet to the one end of keeping away from axial fan air outlet shrink gradually, the one end that axial fan air outlet was kept away from to the fan runner is provided with the diffusion tube, the internal diameter of diffusion tube is from one side that is close to the fan runner to one side of keeping away from the fan runner crescent, just install the pressure components in the fan runner.

Through adopting above-mentioned technical scheme, in the work, axial fan is with the fan runner input combustion chamber in the fan pipe with the air, and the fan runner that is the shrink form setting has increased the velocity of flow of air current, helps guaranteeing axial fan's output quantity, with the help of the diffusion effect of diffuser pipe, has reduced the velocity of flow of output air current to reduce the dynamic pressure of output air current, improved the static pressure of output air current, help reducing the loss that gaseous outflow axial fan, thereby help improving axial fan's work efficiency.

Preferably: the pressurization subassembly includes axis of rotation, first impeller and drive axis of rotation pivoted driving motor, the axis of rotation rotating turret is established in the fan runner, just the axial of axis of rotation is on a parallel with the length direction of fan runner, first impeller is coaxial to be fixed in the pivot, just first impeller is located one side that the fan runner is close to axial fan air outlet, driving motor fixed mounting is on the fan pipe, just driving motor's output shaft passes through shaft coupling and pivot fixed connection.

Through adopting above-mentioned technical scheme, rotate by first impeller and pressurize the air current that gets into in the fan runner to improve the velocity of flow of air current, thereby help guaranteeing axial fan's output.

Preferably: the pressurizing assembly further comprises a second impeller, the second impeller is coaxially fixed on the rotating shaft, and the second impeller is located on one side, close to the diffusion pipe, of the fan flow channel.

Through adopting above-mentioned technical scheme, carry out the pressure boost with the help of the air of second impeller outflow fan runner, help improving gaseous velocity of flow, guaranteed axial fan's output, and help reducing gaseous outflow axial fan's loss.

Preferably: the diameter of the first impeller is slightly smaller than the inner diameter of the fan flow channel corresponding to the first impeller, and the diameter of the second impeller is slightly smaller than the inner diameter of the fan flow channel corresponding to the second impeller.

Through adopting above-mentioned technical scheme, with the help of first impeller and the second impeller that the diameter slightly littleer corresponds fan runner internal diameter, help improving the pressure boost effect of first impeller and second impeller to the air current.

Preferably: and a pressurizing flow channel is formed in the fan pipe, is positioned between the air outlet of the axial flow fan and the fan flow channel and gradually shrinks from one side close to the air outlet of the axial flow fan to one side close to the fan flow channel.

Through adopting above-mentioned technical scheme, carry out preliminary pressure boost with the help of the pressurization runner to the air current that flows into in the fan runner, increased the velocity of flow of air current.

Preferably: and the inner wall of the diffusion pipe is provided with a spiral diversion trench.

Through adopting above-mentioned technical scheme, with the help of spiral guiding gutter, reduced the velocity of flow of air current on the one hand, help reducing the loss of air current, on the other hand helps weakening the noise that the gaseous effluent diffusion tube produced.

Preferably: the spiral guiding gutter is embedded with to inhale the sound cotton.

Through adopting above-mentioned technical scheme, inhale the sound with the help of inhaling the sound cotton, help weakening the produced noise of gaseous outflow diffusion tube.

Preferably: the pressurization assembly comprises a first rotating shaft, a second rotating shaft, a first impeller, a second impeller, a first servo motor and a second servo motor, wherein the first rotating shaft and the second rotating shaft are both rotatably erected in a fan runner, the first impeller is coaxially fixed on the first rotating shaft, the first impeller is positioned on one side, close to an air outlet of the axial flow fan, of the fan runner, the second impeller is coaxially fixed on the second rotating shaft, the second impeller is positioned on one side, close to a diffusion pipe, of the fan runner, the first servo motor and the second servo motor are both fixedly installed on the fan pipe, the first servo motor is connected with the first rotating shaft through a coupler, and the second servo motor is connected with the second rotating shaft through a coupler.

Through adopting above-mentioned technical scheme, in operation, first pivot of first servo motor drive rotates to drive first impeller and rotate, second servo motor drive second pivot rotates, thereby drives the second impeller and rotates, thereby makes the staff adjust the rotational speed of first impeller and second impeller respectively according to the demand, helps improving the suitability of fan pipeline.

In summary, the present application includes at least one of the following beneficial technical effects:

(1) by means of the diffusion effect of the diffusion pipe, the flow velocity of the output airflow is reduced, so that the dynamic pressure of the output airflow is reduced, the static pressure of the output airflow is improved, the loss of the air flowing out of the axial flow fan is reduced, and the working efficiency of the axial flow fan is improved;

(2) the pressurization flow channel, the first impeller and the second impeller are matched to pressurize and accelerate the air flow output by the axial flow fan, and the flow of the axial flow fan is guaranteed.

Drawings

Fig. 1 is a schematic view mainly showing an overall structure of an axial flow fan according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present disclosure, which mainly shows an overall structure of a fan duct;

fig. 3 is a schematic cross-sectional view of an overall structure of a fan duct according to a second embodiment of the present application.

Reference numerals: 1. a fan duct; 2. a fan flow channel; 21. a supporting seat; 22. a support table; 221. a mounting gap; 3. a pressurizing assembly; 31. a rotating shaft; 32. a first impeller; 33. a second impeller; 34. a drive motor; 4. a diffuser tube; 41. a spiral diversion trench; 42. sound-absorbing cotton; 5. a pressurizing flow channel; 6. a first rotating shaft; 7. a second rotating shaft; 8. a first servo motor; 9. a second servo motor.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The first embodiment is as follows:

the embodiment of the application discloses fan pipe for axial fan. Referring to fig. 1 and 2, a fan tube 1 for an axial flow fan includes a fan tube 1 mounted on the axial flow fan, a fan flow channel 2 is integrally formed in the fan tube 1, an axis of the fan flow channel 2 is collinear with an axis of the fan tube 1, and the fan flow channel 2 is communicated with an air outlet of the axial flow fan. The fan runner 2 gradually shrinks from one end close to the air outlet of the axial flow fan to one end far away from the air outlet of the axial flow fan, and the pressurizing assembly 3 is installed in the fan runner 2. And a diffusion pipe 4 is integrally formed at one end of the fan flow channel 2 far away from the air outlet of the axial flow fan.

Referring to fig. 2, the pressurizing assembly 3 includes a rotating shaft 31, a first impeller 32, a second impeller 33, and a driving motor 34 for driving the rotating shaft 31 to rotate. The inner wall of the fan flow channel 2 is fixedly welded with a supporting seat 21, the supporting seat 21 is fixedly welded on two axial sides of the fan flow channel 2, two ends of the rotating shaft 31 are rotatably erected on the two supporting seats 21 through bearings respectively, and the axis of the rotating shaft 31 is collinear with the axis of the fan flow channel 2. The driving motor 34 is welded and fixed on the supporting seat 21 close to the air outlet of the axial flow fan, an output shaft of the driving motor 34 is coaxially and fixedly connected with the rotating shaft 31 through a coupler, and the driving motor 34 drives the rotating shaft 31 to rotate when being started.

The first impeller 32 is coaxially welded and fixed at one end of the rotating shaft 31 close to the air outlet of the axial flow fan, the second impeller 33 is coaxially welded and fixed at one end of the rotating shaft 31 close to the diffusion tube 4, and the first impeller 32 and the second impeller 33 are both arranged in the fan flow channel 2. The gas entering the fan flow channel 2 is pressurized by the rotation of the first impeller 32 and the second impeller 33, so that the waste total pressure of the gas flow and the speed of the gas flow are improved, and the output quantity of the axial flow fan is ensured. In order to improve the pressurization effect of the first impeller 32 and the second impeller 33, the diameters of the first impeller 32 and the second impeller 33 are slightly smaller than the inner diameter of the fan flow channel 2 at the installation position of the first impeller 32 and the second impeller 33, so that the gas flowing into the fan flow channel 2 from the gap formed by the first impeller 32 and the inner wall of the fan flow channel 2 is reduced, and the gas in the fan flow channel 2 flows out of the fan flow channel 2 through the gap formed by the second impeller 33 and the inner wall of the fan flow channel 2.

A pressurizing flow channel 5 is further integrally formed in the fan tube 1, and the pressurizing flow channel 5 is located between the air outlet of the axial flow fan and the fan flow channel 2 and communicates the air outlet of the axial flow fan with the fan flow channel 2. The axis of the pressurizing flow channel 5 is collinear with the axis of the fan flow channel 2, the pressurizing flow channel 5 gradually shrinks from one side close to the air outlet of the axial flow fan to one side close to the fan flow channel 2, and the pressurizing flow channel 5 with the gradually reduced inner diameter is used for primarily pressurizing the air flow output by the axial flow fan, so that the flow speed of the air flow is improved.

Referring to fig. 2, the inner diameter of the diffuser pipe 4 gradually increases from a side close to the fan flow channel 2 to a side far from the fan flow channel 2, so that after the air flow flows into the diffuser pipe 4, the flow rate of the air flow is reduced through the diffusion effect of the diffuser pipe 4, the total pressure of the air flow is equal to the dynamic pressure of the air flow to increase the static pressure of the air flow, the total pressure of the air flow is stable after the air flow enters the diffuser pipe 4, the flow rate of the air flow is reduced, the dynamic pressure of the air flow is reduced, the static pressure of the air flow is increased, the loss of the air flow is reduced, and the. In order to further reduce the flow velocity of the airflow flowing out of the diffusion tube 4, the inner wall of the diffusion tube 4 is provided with a spiral guide groove 41, sound-absorbing cotton 42 is embedded in the spiral guide groove 41, and by means of the matching of the spiral guide groove 41 and the sound-absorbing cotton 42, the flow velocity of the airflow can be reduced on one hand, and the noise can be reduced on the other hand.

The implementation principle of the first embodiment of the application is as follows: in the work, axial fan is with the air in through 1 suction combustion chambers of fan pipe, the air current that flows from the axial fan air outlet is carried out preliminary pressurization through pressurization runner 5, with higher speed, later get into in the fan runner 2, the staff restarts driving motor 34 and drives axis of rotation 31 and rotate, thereby drive first impeller 32 and second impeller 33 and rotate, thereby carry out further pressurization to the air current, with higher speed, later the air current is again through the outflow of diffuser 4, with the help of the diffusion of diffuser 4, the dynamic pressure that has reduced the air current has improved the static pressure of air current, thereby the loss of air current has been reduced.

Example two:

the difference between the first embodiment and the second embodiment is that, referring to fig. 1, the pressing assembly 3 includes a first rotating shaft 6, a second rotating shaft 7, a first impeller 32, a second impeller 33, a first servomotor 8, and a second servomotor 9. A support table 22 is welded and fixed on the inner wall of the fan flow channel 2, a mounting gap 221 is formed in the middle of the support table 22, and one support table 22 is welded and fixed on two axial sides of the fan flow channel 2. The two ends of the first rotating shaft 6 are rotatably erected on the supporting table 22 close to the air outlet of the axial flow fan through bearings, the first impeller 32 is coaxially welded and fixed on the first rotating shaft 6, and the first impeller 32 is located in the installation gap 221 of the corresponding supporting table 22. The first servo motor 8 is welded on one side, which is close to the support table 22 at the air outlet of the axial flow fan and deviates from the diffusion tube 4, and the output shaft of the first servo motor 8 is coaxially and fixedly connected with the first rotating shaft 6 through a coupler.

Two ends of the second rotating shaft 7 are rotatably erected on the support table 22 close to the diffuser pipe 4 through bearings, the second impeller 33 is coaxially welded and fixed on the second rotating shaft 7, and the second impeller 33 is located in the corresponding support mounting gap 221. The second servo motor 9 is welded on one side, which is close to the support table 22 of the diffusion pipe 4 and deviates from the air outlet of the axial flow fan, and the output shaft of the second servo motor 9 is coaxially and fixedly connected with the second rotating shaft 7 through a coupler.

During work, a worker respectively starts the first servo motor 8 and the second servo motor 9 to respectively drive the first impeller 32 to rotate and the second impeller 33 to rotate, and the first impeller 32 and the second impeller 33 can be kept at different rotating speeds to pressurize airflow, so that the pressurization effect is improved.

The implementation principle of the second embodiment of the present application is as follows: in the work, axial fan is with the air in 1 suction combustion chamber of fan pipe, the air current that flows from the axial fan air outlet carries out preliminary pressurization through pressurization runner 5, with higher speed, later get into in fan runner 2, the staff does not start first servo motor 8 and second servo motor 9 again, first impeller 32 of first servo motor 8 drive rotates, second impeller 33 of second servo motor 9 drive rotates, thereby make the staff can adjust the rotational speed of two impellers respectively according to the demand, later with the help of the diffusion of diffuser pipe 4, the dynamic pressure of air current has been reduced and the static pressure of air current has been improved, thereby the loss of air current has been reduced.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a fan pipe for axial fan, is including installing fan pipe (1) on axial fan, the shaping has fan runner (2) in fan pipe (1), fan runner (2) and axial fan's air outlet intercommunication, its characterized in that, fan runner (2) shrink gradually to the one end of keeping away from the axial fan air outlet from the one end that is close to the axial fan air outlet, the one end that axial fan air outlet was kept away from in fan runner (2) is provided with diffuser (4), the internal diameter of diffuser (4) is crescent from one side that is close to fan runner (2) to the one side of keeping away from fan runner (2), just install pressure components (3) in fan runner (2).

2. The axial-flow fan pipe according to claim 1, wherein the pressurizing assembly (3) comprises a rotating shaft (31), a first impeller (32), and a driving motor (34) for driving the rotating shaft (31) to rotate, the rotating shaft (31) is rotatably erected in the fan flow channel (2), the axial direction of the rotating shaft (31) is parallel to the length direction of the fan flow channel (2), the first impeller (32) is coaxially fixed on the rotating shaft, the first impeller (32) is located on one side of the fan flow channel (2) close to the air outlet of the axial-flow fan, the driving motor (34) is fixedly installed on the fan pipe (1), and the output shaft of the driving motor (34) is fixedly connected with the rotating shaft through a coupler.

3. A fan tube for an axial fan according to claim 2, wherein the pressurizing assembly (3) further comprises a second impeller (33), the second impeller (33) is coaxially fixed to the rotating shaft (31), and the second impeller (33) is located on the side of the fan flow path (2) close to the diffuser (4).

4. A fan tube for an axial flow fan according to claim 3, wherein the diameter of the first impeller (32) is slightly smaller than the inner diameter of the corresponding fan flow channel (2), and the diameter of the second impeller (33) is slightly smaller than the inner diameter of the corresponding fan flow channel (2).

5. The axial flow fan duct according to claim 1, wherein a pressurizing flow channel (5) is further formed in the fan duct (1), the pressurizing flow channel (5) is located between the axial flow fan outlet and the fan flow channel (2), and the pressurizing flow channel (5) gradually shrinks from a side close to the axial flow fan outlet to a side close to the fan flow channel (2).

6. The axial flow fan pipe as claimed in claim 1, wherein the inner wall of the diffuser pipe (4) is provided with spiral guide grooves (41).

7. A fan pipe for an axial flow fan according to claim 6, wherein sound absorbing cotton (42) is embedded in the spiral guide groove (41).

8. The axial-flow fan tube according to claim 1, wherein the pressurizing assembly (3) comprises a first rotating shaft (6), a second rotating shaft (7), a first impeller (32), a second impeller (33), a first servo motor (8) and a second servo motor (9), both the first rotating shaft (6) and the second rotating shaft (7) are rotatably erected in the fan flow channel (2), the first impeller (32) is coaxially fixed on the first rotating shaft (6), the first impeller (32) is positioned on one side of the fan flow channel (2) close to the air outlet of the axial-flow fan, the second impeller (33) is coaxially fixed on the second rotating shaft (7), the second impeller (33) is positioned on one side of the fan flow channel (2) close to the diffuser (4), and both the first servo motor (8) and the second servo motor (9) are fixedly installed on the fan tube (1), and the first servo motor (8) is coaxially and fixedly connected with the first rotating shaft (6) through a coupler, and the second servo motor (9) is coaxially and fixedly connected with the second rotating shaft (7) through a coupler.