CN215762341U

CN215762341U - Single-motor driven 4-stage disrotatory axial flow fan driven by conical gear

Info

Publication number: CN215762341U
Application number: CN202121337628.2U
Authority: CN
Inventors: 贺秋冬; 乐文武; 罗严; 张阳; 袁佳俊; 罗畅
Original assignee: Hubei Engineering University
Current assignee: Hubei Engineering University
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-02-08
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a 4-stage contra-rotating axial flow fan driven by a single motor and driven by a bevel gear, which comprises a shell, a power source arranged in the shell, and two bevel gear reduction boxes symmetrically arranged on two sides of the power source; the single bevel gear reduction box comprises a box body, a main shaft arranged in the box body, a hollow gear shaft coaxially sleeved outside the main shaft, and a bevel gear shaft of which the central axis is vertical to the central axis of the main shaft; a single first bevel gear is arranged on the periphery of the main shaft, a single second bevel gear is arranged on the periphery of the hollow gear shaft, a single third bevel gear is arranged between the first bevel gear and the second bevel gear, and the third bevel gear is coaxially connected with the bevel gear shaft; the third bevel gear is respectively meshed with the first bevel gear and the second bevel gear. The utility model is provided with the bevel gear reduction box, and the bevel gear reduction box is only provided with three bevel gears, so that one input, two opposite-rotation and coaxial transmission outputs can be realized, the structure of the reduction box is simplified, and the structure of the ventilator is further simplified.

Description

Single-motor driven 4-stage disrotatory axial flow fan driven by conical gear

Technical Field

The utility model belongs to the technical field of ventilators, and particularly relates to a single-motor driven 4-stage disrotatory axial flow ventilator driven by a bevel gear.

Background

A ventilator is a machine that increases the pressure of gas and discharges the gas by means of input mechanical energy.

As shown in fig. 1, in the related art ventilator, a multi-stage ventilator (i.e., having a plurality of impellers) requires a plurality of motors, each of which drives 1 impeller. For example, utility model No. 200420035217.8 discloses a multistage counter-rotating axial-flow fan, each impeller of which requires a motor to drive. When the number of the impellers is large, the number of the required motors is large, so that the structure of the multistage ventilator is too large, and the cost is also increased.

As shown in fig. 2, there is a counter-rotating type local fan in the related art, in which a power source is an electric motor. The output shaft of motor left end and the output shaft of right-hand member respectively pass through the input shaft of shaft coupling and straight spur gear derailleur, respectively install 1 impeller on 2 output shafts of straight spur gear derailleur, the rotation direction of these four impellers is opposite, realizes 4 grades of disrotatory formula axial compressor ventilation. In the above-mentioned technique, a motor can drive four impellers of drive and carry out the disrotatory ventilation, compares with the technical scheme of 1 impeller of 1 motor drive, has saved the ventilation blower cost greatly to the volume of ventilation blower has also been reduced. However, this solution also has certain drawbacks. As shown in fig. 3, the spur gear transmission uses five spur gears for transmission, and the structure is complex.

Disclosure of Invention

The utility model aims to provide a single-motor driven bevel gear driven 4-stage contra-rotating axial flow fan, aiming at the problems in the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a4-stage contra-rotating axial flow fan driven by a single motor and driven by a bevel gear is characterized by comprising a shell, a power source arranged in the shell, and two bevel gear reduction boxes symmetrically arranged on two sides of the power source; the single bevel gear reduction box comprises a box body, a main shaft arranged in the box body, a hollow gear shaft coaxially sleeved outside the main shaft, and a bevel gear shaft of which the central axis is vertical to the central axis of the main shaft; a single first bevel gear is arranged on the periphery of the main shaft, a single second bevel gear is arranged on the periphery of the hollow gear shaft, a single third bevel gear is arranged between the first bevel gear and the second bevel gear, and the third bevel gear is coaxially connected with the bevel gear shaft; the third bevel gear is meshed with the first bevel gear and the second bevel gear respectively; the two ends of the main shaft are a main shaft input end and a main shaft output end; the input end of the main shaft is connected with the output end of the power source; and an impeller is arranged at the output end of the main shaft and at one end of the hollow gear shaft.

The utility model is provided with the bevel gear reduction box, and the bevel gear reduction box is only provided with three bevel gears, so that one input, two opposite-direction rotation and coaxial transmission output can be realized, the structure of the reduction box is simplified, and the structure of the ventilator is further simplified. Meanwhile, the power source is arranged in the shell, so that the radial size of the ventilator is reduced, and the transportation and installation of the ventilator in a narrow roadway in a mine underground are facilitated. In addition, 4 that a power supply can drive direction of rotation opposite the impeller realizes the ventilation of disrotatory formula axial compressor, can improve the efficiency of ventilation blower through disrotatory, and need not the stator to simplify the structure of ventilation blower, obtained the advantage of disrotatory formula ventilation, avoided the phenomenon that traditional single motor drive single impeller makes ventilation system structure complicated again.

When the main shaft rotates, the first bevel gear can be driven to synchronously rotate; when the first bevel gear rotates, the third bevel gear can be driven to rotate; because the third bevel gear is meshed with the second bevel gear, the second bevel gear also rotates, and the hollow gear shaft is driven to synchronously rotate. The first bevel gear and the second bevel gear rotate in opposite directions, so that the main shaft and the hollow gear shaft rotate in opposite directions, the output end of the main shaft and the hollow gear shaft are both provided with an impeller, and the rotating directions of the two impellers are opposite. Through the mode, the single bevel gear reduction box can drive the two impellers to rotate oppositely, and the two bevel gear reduction boxes are symmetrically arranged on two sides of the power source, so that the four impellers can be driven to rotate.

Furthermore, the impeller arranged at the output end of the main shaft and the impeller arranged on the hollow gear shaft are positioned on the same side of the bevel gear reduction box.

Furthermore, the bevel gear reduction box also comprises an end cover, a first sleeve rotationally connected with the main shaft through a roller bearing, a second sleeve rotationally connected with the hollow gear shaft through a roller bearing, and an adjusting gasket; the first sleeve and the second sleeve are respectively arranged at two ends of the box body; the end covers are arranged on the end faces, far away from the third bevel gear, of the first sleeve and the second sleeve, and the spindle penetrates through the end covers. Adjusting gaskets are arranged at the junctions of the first sleeve, the second sleeve and the end cover; the junction of the first sleeve, the second sleeve and the box body is provided with an adjusting gasket.

The end cover can prevent external dust from entering the interior of the box body, and the influence of foreign matters such as dust on transmission among all parts in the box body is avoided. The first sleeve, the second sleeve and the roller bearing are matched to enable the main shaft and the hollow gear shaft to rotate, and smooth transmission process is guaranteed.

Furthermore, a roller bearing is arranged between the bevel gear shaft and the box body. The roller bearing can ensure that the bevel gear shaft smoothly rotates, and the transmission process of the bevel gear is smoothly carried out.

Further, the rotation directions of the adjacent impellers are opposite. The rotating directions of the impellers between the two bevel gear reduction boxes are opposite, so that the surrounding air can be well disturbed, and the output wind pressure and the ventilation volume of the whole fan can be increased.

Further, the power source is a motor, and the motor is a multi-speed motor or a single-speed motor. When the power source is a single-speed motor, the power source is connected with a variable-frequency speed regulating device.

Furthermore, a first baffle is arranged at the end face of the hollow gear shaft, which is far away from the third bevel gear, and a second baffle is arranged at the end face of the output end of the main shaft. The first baffle plate is connected with the end face of the hollow gear shaft, and the second baffle plate is connected with the end face of the output end of the main shaft through screws. The first baffle and the second baffle can prevent foreign matters such as external dust from entering the box body.

Compared with the prior art, the utility model has the beneficial effects that: the utility model is provided with a bevel gear reduction box, and the bevel gear reduction box is only provided with three bevel gears, so that one input and two coaxial transmission outputs with opposite rotation directions can be realized, the structure of the reduction box is simplified, and the structure of a ventilator is further simplified; the power source is arranged in the shell, so that the radial size of the ventilator is reduced, and the transportation and installation of the ventilator in a narrow roadway under a mine well are facilitated; and (III) one power source can drive four impellers with opposite rotating directions to realize contra-rotating axial flow ventilation, the efficiency of the ventilator can be improved through contra-rotating, and guide vanes are not needed, so that the structure of the ventilator is simplified, the advantage of contra-rotating ventilation is obtained, and the phenomenon that the ventilation system is complicated because a single traditional motor drives a single impeller is avoided.

Drawings

FIG. 1 is a schematic view of a multi-stage counter-rotating axial-flow fan of the prior art;

FIG. 2 is a schematic view of a contra-rotating local ventilator according to the prior art;

FIG. 3 is a schematic structural diagram of a prior art spur gear transmission;

FIG. 4 is a schematic front view of the present invention;

FIG. 5 is a schematic side view of the present invention;

FIG. 6 is a schematic view of the bevel gear reduction gearbox of the present invention;

in the figure: 1. a housing; 2. a power source; 3. a bevel gear reduction box; 4. a box body; 5. a main shaft; 5.1, a main shaft input end; 5.2 main shaft output end; 6. a hollow gear shaft; 7. a bevel gear shaft; 8. a first bevel gear; 9. a second bevel gear; 10. a third bevel gear; 11. a power source output end; 12. an impeller; 13. an end cap; 14. a roller bearing 15, a first sleeve; 16. a second sleeve; 17. adjusting the gasket; 19. a protective net; 20. a motor junction box; 21. an air inlet cylinder; 22. an air outlet cylinder; 23. a sound-deadening layer; 24. a flange; 25. a coupling; 26. lifting lugs; 27. an outer housing; 28. an inner housing.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 4, 5 and 6, a single motor driven 4-stage contra-rotating axial-flow fan with bevel gear transmission comprises a housing 1, a power source 2 arranged inside the housing 1, and two bevel gear reduction boxes 3 symmetrically arranged at two sides of the power source 2.

The lower extreme of casing 1 is equipped with the lower margin, the primary function of lower margin is used for supporting, the lower margin can be with casing 1 separates with ground, plays damp-proofing effect. An air inlet cylinder 21 is arranged at one end of the shell 1, and an air outlet cylinder 22 is arranged at the other end of the shell. The air inlet cylinder 21 and the shell 1, and the air outlet cylinder 22 and the shell 1 are fixedly connected through flanges 24. A protective screen 19 is arranged inside the air inlet drum 21, and the protective screen 19 can prevent overlarge foreign matters from entering the inside of the ventilator to damage the impeller 12. Still be equipped with noise elimination layer 23 in the casing 1, noise elimination layer 23 can reduce the sound that this disrotatory axial fan during operation produced.

As shown in fig. 5, the housing 1 includes an inner housing 28 and an outer housing 27, and the side wall of the outer housing 27 is provided with a lifting lug 26.

The single bevel gear reduction box 3 comprises a box body 4, a main shaft 5 arranged in the box body 4, a hollow gear shaft 6 coaxially sleeved on the outer side of the main shaft 5, and a bevel gear shaft 7 with the central axis vertical to the central axis of the main shaft 5. A single first bevel gear 8 is arranged on the periphery of the main shaft 5, a single second bevel gear 9 is arranged on the periphery of the hollow gear shaft 6, a single third bevel gear 10 is arranged between the first bevel gear 8 and the second bevel gear 9, the third bevel gear 10 is coaxially connected with the bevel gear shaft 7, and the third bevel gear 10 is respectively meshed with the first bevel gear 8 and the second bevel gear 9; the two ends of the main shaft 5 are a main shaft input end 5.1 and a main shaft output end 5.2.

When the main shaft input end 5.1 rotates, the main shaft output end 5.2 and the first bevel gear 8 rotate synchronously. The first bevel gear 8 can drive the third bevel gear 10 to rotate, and further drive the second bevel gear 9 to rotate, and the second bevel gear 9 drives the gear hollow shaft 6 to rotate. The gear hollow shaft 6 rotates in the opposite direction to the main shaft output end 5.2.

The main shaft input end 5.1 is connected with the power source output end 11 through a coupler 25. The power source 2 can drive the spindle input end 5.1 to rotate.

An impeller 12 is arranged at both the output end 5.2 of the main shaft and one end of the hollow gear shaft 6. The spindle output 5.2 and the hollow geared shaft 6 rotate in opposite directions, so that the impeller 12 connected to the spindle output 5.2 and the impeller 12 connected to the hollow geared shaft 6 rotate in opposite directions.

The utility model is provided with the bevel gear reduction box 3, and the bevel gear reduction box 3 is only provided with three bevel gears to realize one input, two opposite-direction rotation and coaxial transmission output, thereby simplifying the structure of the reduction box and further simplifying the structure of the ventilator. Meanwhile, the power source 2 is arranged in the shell 1, so that the radial size of the ventilator is reduced, and the transportation and installation of the ventilator in a narrow roadway under a mine well are facilitated. In addition, one power source 2 can drive four impellers 12 with opposite rotating directions to realize contra-rotating axial flow ventilation, the efficiency of the ventilator can be improved through contra-rotating, and guide vanes are not needed, so that the structure of the ventilator is simplified, the advantage of contra-rotating ventilation is obtained, and the phenomenon that the ventilation system is complicated in structure because a single traditional motor drives the single impeller 12 is avoided.

When the main shaft 5 rotates, the first bevel gear 8 can be driven to synchronously rotate; when the first bevel gear 8 rotates, the third bevel gear 10 can be driven to rotate; since the third bevel gear 10 is meshed with the second bevel gear 9, the second bevel gear 9 also rotates, and the hollow gear shaft 6 is driven to rotate synchronously. The first bevel gear 8 and the second bevel gear 9 rotate in opposite directions, so that the main shaft 5 and the hollow gear shaft 6 rotate in opposite directions, the main shaft output end 5.2 and the hollow gear shaft 6 are both provided with an impeller 12, and the rotation directions of the two impellers 12 are opposite. Through the mode, the bevel gear reduction boxes 3 can drive the two impellers 12 to rotate oppositely, and the two bevel gear reduction boxes 3 are symmetrically arranged on two sides of the power source 2, so that the four impellers 12 can be driven to rotate.

Further, the impeller 12 arranged at the output end 5.2 of the main shaft and the impeller 12 arranged at the hollow gear shaft 6 are positioned on the same side of the bevel gear reduction box 3.

Further, the bevel gear reduction box 3 further comprises an end cover 13, a first sleeve 15 rotationally connected with the main shaft 5 through a roller bearing 14, a second sleeve 16 rotationally connected with the hollow gear shaft 6 through the roller bearing 14, and an adjusting gasket 17. The first sleeve 15 and the second sleeve 16 are respectively arranged at two ends of the box body 4; the end covers 13 are arranged on the end faces, away from the third bevel gear 10, of the first sleeve 15 and the second sleeve 16, and the spindle 5 penetrates through the end covers 13. And small felt ring oil seals are arranged between the input end of the main shaft and the first sleeve 15 and between the output end of the hollow gear shaft 6 and the second sleeve 16. Adjusting gaskets are arranged at the junctions of the first sleeve 15, the second sleeve 16 and the end cover 13; adjusting gaskets are arranged at junctions of the first sleeve 15, the second sleeve 16 and the box body 4.

The end cover 13 can prevent external dust from entering the interior of the box body 4, and prevent foreign matters such as dust from affecting transmission among various parts in the box body 4. The first sleeve 15, the second sleeve 16 and the roller bearing 14 are matched to enable the main shaft 5 and the hollow gear shaft 6 to rotate, and smooth transmission is guaranteed.

Further, a roller bearing 14 is arranged between the bevel gear shaft 7 and the box body 4. The roller bearing 14 can ensure that the bevel gear shaft 7 can smoothly rotate, and the transmission process of the bevel gear can be smoothly carried out.

Further, the rotation directions of the adjacent impellers 12 are opposite. The rotating directions of the impellers 12 between the two bevel gear reduction boxes 3 are opposite, so that the surrounding air can be disturbed better, and the output wind pressure and the ventilation volume of the whole fan can be increased.

Further, the power source 2 is a motor. The outer side wall of the shell 1 is provided with a motor junction box 20, and the motor junction box 20 is connected with the motor. The motor is a multi-speed motor or a single-speed motor. When the power source 2 is a single-speed motor, the power source 2 is connected with a variable-frequency speed regulating device.

Furthermore, a first baffle is arranged on the end face of the hollow gear shaft 6 far away from the third bevel gear 10, and a second baffle is arranged on the end face of the main shaft output end 5.2. The first baffle plate is connected with the end face of the hollow gear shaft 6 and the second baffle plate is connected with the end face of the main shaft output end 5.2 through screws. The first baffle and the second baffle can prevent foreign matters such as external dust from entering the box body 4.

The working process is as follows: the power source output end 11 can drive the main shaft input end 5.1 to synchronously rotate, and further drive the first bevel gear 8 to synchronously rotate.

When the first bevel gear 8 rotates, the third bevel gear 10 is driven to rotate under the meshing action of the bevel gears; since the third bevel gear 10 is meshed with the second bevel gear 9, the second bevel gear 9 also rotates, and the hollow gear shaft 6 is driven to rotate synchronously.

The rotating directions of the first bevel gear 8 and the second bevel gear 9 are opposite, so that the rotating directions of the output end of the main shaft 5 and the hollow gear shaft 6 are opposite, the output end of the main shaft 5 and the hollow gear shaft 6 are both provided with an impeller 12, the rotating directions of the two impellers 12 are opposite, and the bevel gear reduction boxes 3 can drive the two impellers 12 to rotate oppositely in the mode. Therefore, the utility model can drive the four impellers 12 to rotate, and the 4-stage disrotatory axial flow effect is realized.

The bevel gear reduction box 3 is only provided with three bevel gears, and compared with a straight-tooth cylindrical gear transmission in the prior art which is provided with five cylindrical gears for transmission, the structure is simpler.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A4-stage contra-rotating axial flow fan driven by a single motor and driven by a bevel gear is characterized by comprising a shell, a power source arranged in the shell, and two bevel gear reduction boxes symmetrically arranged on two sides of the power source; the single bevel gear reduction box comprises a box body, a main shaft arranged in the box body, a hollow gear shaft coaxially sleeved outside the main shaft, and a bevel gear shaft of which the central axis is vertical to the central axis of the main shaft; a single first bevel gear is arranged on the periphery of the main shaft, a single second bevel gear is arranged on the periphery of the hollow gear shaft, a single third bevel gear is arranged between the first bevel gear and the second bevel gear, and the third bevel gear is coaxially connected with the bevel gear shaft; the third bevel gear is meshed with the first bevel gear and the second bevel gear respectively; the two ends of the main shaft are a main shaft input end and a main shaft output end; the input end of the main shaft is connected with the output end of the power source; and an impeller is arranged at the output end of the main shaft and at one end of the hollow gear shaft.

2. The single motor driven bevel gear driven 4-stage contra-rotating axial flow fan according to claim 1, wherein the impeller provided on the output end of the main shaft and the impeller provided on the hollow gear shaft are located on the same side of the bevel gear reduction box.

3. The single motor driven bevel gear driven 4-stage contra-rotating axial flow fan according to claim 1, wherein the bevel gear reduction box further comprises an end cover, a first sleeve rotationally connected with the main shaft through a roller bearing, a second sleeve rotationally connected with the hollow gear shaft through a roller bearing, and an adjusting shim; the first sleeve and the second sleeve are respectively arranged at two ends of the box body; the end covers are arranged on the end faces, far away from the third bevel gear, of the first sleeve and the second sleeve, and the spindle penetrates through the end covers.

4. The single motor driven bevel gear driven 4-stage contra-rotating axial flow fan of claim 1 wherein roller bearings are provided between the bevel gear shaft and the case.

5. The single motor driven bevel gear driven 4-stage contra-rotating axial flow fan of claim 1 wherein adjacent impellers have opposite rotational directions.

6. The single motor driven bevel gear driven 4-stage contra-rotating axial flow fan of claim 1 wherein the power source is an electric motor, and the electric motor is a multi-speed motor or a single-speed motor.

7. The single motor driven bevel gear driven 4-stage contra-rotating axial flow fan according to claim 1, wherein a first baffle is disposed on an end surface of the hollow gear shaft away from the third bevel gear, and a second baffle is disposed on an end surface of the output end of the main shaft.