CN112879320B

CN112879320B - Low-noise axial flow fan for rail transit

Info

Publication number: CN112879320B
Application number: CN202110188375.5A
Authority: CN
Inventors: 薛艳杰; 唐汐; 汪智渊; 胡伟锋
Original assignee: Sichuan Tibet Railway Co ltd; China Railway No 3 Engineering Group Co Ltd; Fourth Engineering Co Ltd of China Railway No 3 Engineering Group Co Ltd; Beijing MTR Construction Administration Corp
Current assignee: Sichuan Tibet Railway Co ltd; China Railway No 3 Engineering Group Co Ltd; Fourth Engineering Co Ltd of China Railway No 3 Engineering Group Co Ltd; Beijing MTR Construction Administration Corp
Priority date: 2021-02-19
Filing date: 2021-02-19
Publication date: 2023-01-13
Anticipated expiration: 2041-02-19
Also published as: CN112879320A

Abstract

The invention relates to the technical field of axial flow fans, and discloses a low-noise axial flow fan for rail transit, which comprises a shell, wherein a fixed frame is arranged in the shell, a driving motor is arranged on the fixed frame, a fan blade fixed seat is arranged on an output shaft of the driving motor, and a plurality of fan blades are arranged on the outer side of the fan blade fixed seat; be equipped with limiting plate, fixed cover and spacing seat in the flabellum fixing base, the one end of spacing seat is pegged graft in driving motor's the output shaft and through the torsional spring with driving motor's output shaft elastic connection, the one end that driving motor was kept away from to spacing seat is equipped with the spacing arch of a plurality of, just spacing protruding ring cloth on the spacing seat. According to the invention, the protective cover is arranged at the front end of the shell and consists of four movable enclosing plates, and when foreign matters are clamped between the fan blades and the enclosing plates, the enclosing plates have certain moving capacity, so that the fan blades can be effectively prevented from being broken.

Description

Low-noise axial flow fan for rail transit

Technical Field

The invention relates to the technical field of axial flow fans, in particular to a low-noise axial flow fan for rail transit.

Background

The axial flow fan is also called a local fan, is mainly used for local ventilation, and has the advantages of convenient installation, obvious ventilation effect and high safety. Current axial fan, flabellum and shell are generally all fixed, and axial fan is when using, in the fan is inhaled the foreign matter easily, when the foreign matter enters into the fan in the back, blocks easily between flabellum and shell to cause the fan card to die or the flabellum fracture, after the fan card dies, need maintainer to clear up the foreign matter after, the fan just can normally work, comparatively troublesome.

Disclosure of Invention

The invention provides a low-noise axial flow fan for rail transit, which has the beneficial effect of automatically cleaning foreign matters and solves the problem in the background art that the foreign matters need to be cleaned manually after the fan is blocked by the foreign matters.

The invention provides the following technical scheme: a low-noise axial flow fan for rail transit comprises a shell, wherein a fixing frame is arranged in the shell, a driving motor is arranged on the fixing frame, a fan blade fixing seat is arranged on an output shaft of the driving motor, and a plurality of fan blades are arranged on the outer side of the fan blade fixing seat;

a limiting plate, a fixing sleeve and a limiting seat are arranged in the fan blade fixing seat, one end of the limiting seat is inserted into the output shaft of the driving motor and is elastically connected with the output shaft of the driving motor through a torsion spring, a plurality of limiting bulges are arranged at one end of the limiting seat far away from the driving motor, and the limiting bulges are annularly distributed on the limiting seat;

the limiting plate is annularly arranged on the outer side of the limiting seat, a damping telescopic rod is fixed at the back of the limiting plate, a supporting spring is sleeved on the outer side of the damping telescopic rod, one end, far away from the limiting plate, of the damping telescopic rod is fixedly connected with the fan blade fixing seat, a limiting groove corresponding to the limiting protrusion is formed in the limiting plate, a limiting block is arranged at one end, close to the driving motor, of the limiting plate, the limiting block is in a conical shape, and a cambered surface is arranged on the inner side of the limiting block;

the fixed cover is fixed on the output shaft of the driving motor through screws, a shifting block is arranged on the outer side of the fixed cover, and one end of the shifting block is abutted to the limiting block.

As an alternative of the low-noise axial flow fan for rail transit, the invention comprises: the fan blade fixing seat is characterized in that a connecting seat is arranged at one end, close to the driving motor, of the fan blade fixing seat, the connecting seat is cylindrical and is rotatably connected with the fan blade fixing seat through a second bearing, a plurality of limiting pieces are arranged at the front end of the connecting seat, and the limiting pieces are annularly distributed in the connecting seat.

As an alternative of the low-noise axial flow fan for rail transit, the invention comprises: the fan blade fixing seat is characterized in that a push rod is further arranged in the fan blade fixing seat, one end of the push rod abuts against the limiting block, the other end of the push rod abuts against the connecting seat, and an inclined plane is arranged at one end, close to the limiting block, of the push rod.

As an alternative of the low-noise axial flow fan for rail transit, the invention comprises: the front end of shell is equipped with the protection casing, just the protection casing comprises four bounding walls, the inboard of bounding wall is equipped with the dead lever, just the one end of dead lever is equipped with the dog, the one end of dog is equipped with the arcwall face.

As an alternative of the low-noise axial flow fan for rail transit, the invention comprises: the outside of shell is equipped with four stationary dog, just the position of stationary dog with the bounding wall one-to-one, be equipped with the connecting block in the stationary dog, the one end of connecting block through postpone nitrogen spring with stationary dog elastic connection, just the other end of connecting block with bounding wall fixed connection.

As an alternative of the low-noise axial flow fan for the rail transit, the low-noise axial flow fan comprises the following components: the inner side of the connecting seat is provided with a fixed plate, the front end of the fixed plate is provided with a plurality of top plates, the top plates are positioned in the gap between the two limiting pieces and are elastically connected with the fixed plate through connecting springs, and the outer side of the connecting seat is provided with a driving lever.

As an alternative of the low-noise axial flow fan for rail transit, the invention comprises: and a limiting column is arranged on an output shaft of the driving motor, and one end of the limiting column is welded on the output shaft of the driving motor.

As an alternative of the low-noise axial flow fan for the rail transit, the low-noise axial flow fan comprises the following components: the one end that the protection casing was kept away from to the shell is equipped with the amortization cover, just the amortization cover pass through the screw with shell fixed connection.

As an alternative of the low-noise axial flow fan for the rail transit, the low-noise axial flow fan comprises the following components: the fan blade fixing seat is of a hollow structure and is rotationally connected with an output shaft of the driving motor through a first bearing.

The invention has the following beneficial effects:

1. this track traffic low noise axial fan through set up a protection casing at the front end of shell, and the protection casing comprises four mobilizable bounding walls, works as the foreign matter card between flabellum and bounding wall, because the bounding wall has certain mobility, can prevent effectively that the flabellum from splitting.

2. This track traffic low noise axial fan, have the flabellum fixing base of connecting seat through setting up the back, when the flabellum fixing base is died because of the flabellum card and can't rotate, driving motor's output shaft still can take the connecting seat to rotate, driving lever through on the connecting seat can outwards promote the bounding wall, the bounding wall is after the outside motion, clearance between bounding wall and the flabellum will the grow, then the foreign matter will fall under the effect of self gravity, and drop from the clearance between the bounding wall, thus, after the flabellum is died by the foreign matter card, need not the manual work and clear up, the cleaning work of foreign matter also can be accomplished, it is more convenient to use.

3. This low noise axial fan of track traffic, through set up a fixed plate and a plurality of roof in the connecting seat, through connecting spring elastic connection between roof and the fixed plate, after the connecting seat cup joints on spacing post, spacing post then can be to flabellum fixing base direction extrusion roof, connecting spring holds power this moment, when driving motor no longer during operation, connecting spring can outwards promote the roof, and the roof then can offset with spacing post, under connecting spring's effect, the connecting seat can return the normal position.

Drawings

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

Fig. 2 is a cross-sectional view of the blade holder and the connecting base of the present invention.

Fig. 3 is a cross-sectional view of the shield of the present invention.

FIG. 4 is a top sectional view of the blade holder of the present invention.

Fig. 5 is a front view of the connecting socket of the present invention.

Fig. 6 is a front view of the housing of the present invention.

Fig. 7 is a side view of the present invention.

In the figure: 1. a housing; 2. a fixed mount; 3. a drive motor; 301. a limiting post; 4. a fan blade fixing seat; 5. a fan blade; 6. a limiting plate; 7. fixing a sleeve; 701. shifting blocks; 8. a limiting seat; 801. a limiting bulge; 9. damping telescopic rods; 10. a limiting block; 11. a connecting seat; 12. a second bearing; 13. a limiting sheet; 14. a push rod; 15. a protective cover; 16. enclosing plates; 17. a fixing rod; 18. a stopper; 19. a fixed jaw; 20. connecting blocks; 21. a delayed nitrogen spring; 22. a fixing plate; 23. a top plate; 24. a connecting spring; 25. a deflector rod; 26. a sound deadening hood; 27. a first bearing; 28. supporting the spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Examples

Referring to fig. 1-7, a low-noise axial flow fan for rail transit comprises a housing 1, a fixing frame 2 is arranged in the housing 1, a driving motor 3 is arranged on the fixing frame 2, a fan blade fixing seat 4 is arranged on an output shaft of the driving motor 3, a plurality of fan blades 5 are arranged on the outer side of the fan blade fixing seat 4, the fan blade fixing seat 4 is of a hollow structure, and the fan blade fixing seat 4 is rotatably connected with the output shaft of the driving motor 3 through a first bearing 27;

a limiting plate 6, a fixing sleeve 7 and a limiting seat 8 are arranged in the fan blade fixing seat 4, one end of the limiting seat 8 is inserted into an output shaft of the driving motor 3 and is elastically connected with the output shaft of the driving motor 3 through a torsion spring, a plurality of limiting protrusions 801 are arranged at one end of the limiting seat 8 far away from the driving motor 3, and the limiting protrusions 801 are annularly distributed on the limiting seat 8;

the limiting plate 6 is annularly arranged on the outer side of the limiting seat 8, the back of the limiting plate 6 is fixedly provided with a damping telescopic rod 9, the outer side of the damping telescopic rod 9 is sleeved with a supporting spring 28, one end, far away from the limiting plate 6, of the damping telescopic rod 9 is fixedly connected with the fan blade fixing seat 4, the limiting plate 6 is provided with a limiting groove corresponding to the limiting protrusion 801, one end, close to the driving motor 3, of the limiting plate 6 is provided with a limiting block 10, the limiting block 10 is conical, and the inner side of the limiting block 10 is provided with a cambered surface;

during operation, drive flabellum fixing base 4 and flabellum 5 through driving motor 3 and rotate, flabellum fixing base 4 rotates with driving motor 3's output shaft through first bearing 27 and is connected, be equipped with spacing seat 8 on driving motor 3's output shaft, the one end of spacing seat 8 is pegged graft in driving motor 3's output shaft, and simultaneously, the tip of spacing seat 8 still passes through torsional spring and driving motor 3's output shaft elastic connection, be equipped with limiting plate 6 with spacing 8 cooperation uses in flabellum fixing base 4, limiting plate 6 is connected with flabellum fixing base 4 through damping telescopic link 9, and simultaneously, limiting plate 6 still passes through supporting spring 28 and flabellum fixing base 4 elastic connection, under the normal condition, limiting plate 6 can be under supporting spring 28's promotion with spacing protruding chucking 801 on the spacing seat 8, driving motor 3's output shaft can drive spacing seat 8 when rotating like this, and spacing seat 8 can drive limiting plate 6 and flabellum fixing base 4 and rotate together.

The fixed sleeve 7 is fixed on the output shaft of the driving motor 3 through a screw, a shifting block 701 is arranged on the outer side of the fixed sleeve 7, and one end of the shifting block 701 abuts against the limiting block 10.

One end that flabellum fixing base 4 is close to driving motor 3 is equipped with connecting seat 11, connecting seat 11 is cylindricly, and connecting seat 11 rotates with flabellum fixing base 4 through second bearing 12 to be connected, the front end of connecting seat 11 is equipped with the spacing piece 13 of a plurality of, and spacing piece 13 ring cloth is in connecting seat 11, the inboard of connecting seat 11 is equipped with fixed plate 22, and the front end of fixed plate 22 is equipped with a plurality of roof 23, roof 23 is located the clearance of two spacing pieces 13, and roof 23 passes through coupling spring 24 and fixed plate 22 elastic connection, the outside of connecting seat 11 is equipped with driving lever 25. The output shaft of the driving motor 3 is provided with a limiting column 301, one end of the limiting column 301 is welded on the output shaft of the driving motor 3, the blade fixing seat 4 is further internally provided with a push rod 14, one end of the push rod 14 abuts against the limiting block 10, the other end of the push rod 14 abuts against the connecting seat 11, and one end of the push rod 14, which is close to the limiting block 10, is provided with an inclined plane.

The front end of the shell 1 is provided with a protective cover 15, the protective cover 15 is composed of four enclosing plates 16, the inner sides of the enclosing plates 16 are provided with fixing rods 17, one ends of the fixing rods 17 are provided with stop blocks 18, and one ends of the stop blocks 18 are provided with arc-shaped surfaces. The outside of shell 1 is equipped with four stationary dog 19, and the position of stationary dog 19 and bounding wall 16 one-to-one, is equipped with connecting block 20 in the stationary dog 19, and the one end of connecting block 20 is through postponing nitrogen spring 21 and stationary dog 19 elastic connection, and the other end and the bounding wall 16 fixed connection of connecting block 20.

According to the specific working principle, the protective cover 15 is arranged at the front end of the shell 1, the protective cover 15 consists of four enclosing plates 16, the connecting block 20 is arranged on the outer side of each enclosing plate 16, the connecting block 20 is elastically connected with the fixed claw 19 through the delay nitrogen spring 21, the enclosing plates 16 can move, and when foreign matters are clamped between the fan blades 5 and the enclosing plates 16, the enclosing plates 16 cannot clamp the fan blades 5 at the bottom, so that the fan blades 5 are protected;

when the fan blade 5 is clamped, the fan blade fixing seat 4 cannot rotate any more, the limiting seat 8 is elastically connected with the output shaft of the driving motor 3 through the torsion spring, after the elasticity of the torsion spring is overcome, the output shaft of the driving motor 3 can still rotate, at the moment, when the driving motor 3 rotates, the fixing sleeve 7 and the shifting block 701 can be driven to rotate together, the limiting block 10 can be pushed outwards through the shifting block 701, the limiting block 10 is fixed with the limiting plate 6, at the moment, the limiting block 10 and the limiting plate 6 move outwards together, then the limiting plate 6 is separated from the limiting seat 8, and the output shaft of the driving motor 3 can normally rotate;

it should be noted that, under normal conditions, the shifting block 701, the fixing sleeve 7 and the fan blade fixing base 4 rotate together, when the fan blade fixing base 4 is locked by the fan blade 5 and cannot rotate any more, as long as the output shaft of the driving motor 3 overcomes the elastic force of the torsion spring, the output shaft of the driving motor 3 can still rotate, and at this time, the output shaft of the driving motor 3 drives the fixing sleeve 7 and the shifting block 701 to rotate together.

The limiting block 10 can push the push rod 14 in the process of moving outwards, the push rod 14 can push the connecting seat 11 towards the direction of the driving motor 3, a limiting column 301 is arranged on an output shaft of the driving motor 3, along with the pushing of the push rod 14, the connecting seat 11 can be covered on the outer side of the limiting column 301, along with the rotation of the output shaft of the driving motor 3, the connecting seat 11 can rotate along with the output shaft of the driving motor 3 under the driving of the limiting column 301, a shifting rod 25 on the outer side of the connecting seat 11 can also rotate along with the shifting rod 25, the shifting rod 25 can push the stop block 18 outwards in the rotating process, the stop block 18 can drive the fixing rod 17 and the enclosing plate 16 to move outwards together, at the moment, the gap between the enclosing plate 16 and the fan blades 5 is increased, meanwhile, the gap between the enclosing plate 16 and the enclosing plate 16 is increased, foreign matters in the shell 1 can fall under the action of self gravity, and then fall out through the gap between the enclosing plates 16.

In order to enable the foreign matters to fall out of the protective cover 15 as far as possible, the connecting block 20 is elastically connected with the fixed claw 19 through the delay nitrogen spring 21, the existence of the delay nitrogen spring 21 enables the connecting block 20 not to return to the original position immediately after moving outwards along with the enclosing plates 16, but slowly returns to the original position, enough time can be reserved, the foreign matters can fall out of the gaps between the enclosing plates 16, similarly, the limiting plate 6 is connected with the fan blade fixing seat 4 through the damping telescopic rod 9, the existence of the damping telescopic rod 9 enables the limiting plate 6 not to return to the original position immediately after being pushed outwards, the fan blades 5 cannot rotate immediately, and if the fan blades 5 rotate immediately, the foreign matters can be possibly driven to rotate together.

It should be noted that: under the normal condition, driving lever 25 can't overcome the elasticity that delays nitrogen spring 21, make connecting seat 11 can not rotate, cover when connecting seat 11 behind the outside at spacing post 301, spacing post 301 can take connecting seat 11 to rotate together, thereby overcome the elasticity that delays nitrogen spring 21, and outwards promote dog 18, dead lever 17 and bounding wall 16, connecting seat 11 rotates with flabellum fixing base 4 through first bearing 27 and is connected, first bearing 27 can be along 4 horizontal slip of flabellum fixing base, make connecting seat 11 have certain mobility.

If the connecting seat 11 rotates all the time, then the surrounding plate 16 cannot be folded, therefore, a travel switch is arranged on the fixed claw 19, when the surrounding plate 16 moves to a specified position, the travel switch works to cut off the power supply of the driving motor 3, the output shaft of the driving motor 3 does not rotate any more, when the connecting seat 11 moves towards the driving motor 3, the connecting seat 11 can be covered on the limiting column 301, the limiting column 301 can extrude the top plate 23 towards the direction of the fan blade fixing seat 4, at the moment, the connecting spring 24 stores the force, when the driving motor 3 does not work any more, the connecting spring 24 can outwards push the top plate 23, the top plate 23 can be abutted against the limiting column 301, under the action of the connecting spring 24, the connecting seat 11 can return to the original position, and then the driving motor 3 works again.

In order to prevent the connecting seat 11 from moving to an appointed position due to the fact that the limiting column 301 abuts against the limiting sheet 13 during movement, the outer end of the limiting sheet 13 is in a conical shape, so that when the limiting sheet 13 abuts against the limiting column 301, the limiting sheet 13 deflects to a certain degree, and the limiting column 301 can smoothly enter the connecting seat 11.

It should be noted that: the travel switch is not marked in the figures, and the travel switch is installed at one end of the fixed claw 19 far away from the coaming 16, and as the travel switch is mature prior art, detailed description on a specific control method and a using mode thereof is not provided.

Furthermore, a silencing cover 26 is arranged at one end of the shell 1 far away from the protective cover 15, and the silencing cover 26 is fixedly connected with the shell 1 through screws. The noise reduction cover 26 mainly plays the effect of a noise reduction, and its principle does, through setting up a large amount of little round holes at the inside of the noise reduction cover body, and the existence of little round hole can make the anomalous flow of air current to reduce the concentrated flow of air current, reduce the vibrations of equipment, the noise abatement, because the noise reduction cover 26 is prior art, therefore not giving unnecessary details to the concrete structure of noise reduction cover 26.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a low noise axial fan of track traffic, includes shell (1), its characterized in that: a fixing frame (2) is arranged in the shell (1), a driving motor (3) is arranged on the fixing frame (2), a fan blade fixing seat (4) is arranged on an output shaft of the driving motor (3), and a plurality of fan blades (5) are arranged on the outer side of the fan blade fixing seat (4);

a limiting plate (6), a fixing sleeve (7) and a limiting seat (8) are arranged in the fan blade fixing seat (4), one end of the limiting seat (8) is inserted into an output shaft of the driving motor (3) and is elastically connected with the output shaft of the driving motor (3) through a torsion spring, a plurality of limiting protrusions (801) are arranged at one end, far away from the driving motor (3), of the limiting seat (8), and the limiting protrusions (801) are annularly distributed on the limiting seat (8);

the limiting plate (6) is annularly arranged on the outer side of the limiting seat (8), a damping telescopic rod (9) is fixed to the back of the limiting plate (6), a supporting spring (28) is sleeved on the outer side of the damping telescopic rod (9), one end, far away from the limiting plate (6), of the damping telescopic rod (9) is fixedly connected with the fan blade fixing seat (4), a limiting groove corresponding to the limiting protrusion (801) is formed in the limiting plate (6), a limiting block (10) is arranged at one end, close to the driving motor (3), of the limiting plate (6), the limiting block (10) is in a conical shape, and an arc surface is arranged on the inner side of the limiting block (10);

the fixed sleeve (7) is fixed on an output shaft of the driving motor (3) through a screw, a shifting block (701) is arranged on the outer side of the fixed sleeve (7), and one end of the shifting block (701) is abutted to the limiting block (10);

a connecting seat (11) is arranged at one end, close to the driving motor (3), of the fan blade fixing seat (4), the connecting seat (11) is cylindrical, the connecting seat (11) is rotatably connected with the fan blade fixing seat (4) through a second bearing (12), a plurality of limiting pieces (13) are arranged at the front end of the connecting seat (11), and the limiting pieces (13) are annularly distributed in the connecting seat (11);

a push rod (14) is further arranged in the fan blade fixing seat (4), one end of the push rod (14) abuts against the limiting block (10), the other end of the push rod (14) abuts against the connecting seat (11), and an inclined plane is arranged at one end, close to the limiting block (10), of the push rod (14);

a protective cover (15) is arranged at the front end of the shell (1), the protective cover (15) is composed of four enclosing plates (16), a fixing rod (17) is arranged on the inner side of each enclosing plate (16), a stop block (18) is arranged at one end of each fixing rod (17), and an arc-shaped surface is arranged at one end of each stop block (18);

four fixing claws (19) are arranged on the outer side of the shell (1), the positions of the fixing claws (19) correspond to the enclosing plates (16) one by one, connecting blocks (20) are arranged in the fixing claws (19), one end of each connecting block (20) is elastically connected with the corresponding fixing claw (19) through a delay nitrogen spring (21), and the other end of each connecting block (20) is fixedly connected with the corresponding enclosing plate (16);

a fixing plate (22) is arranged on the inner side of the connecting seat (11), a plurality of top plates (23) are arranged at the front end of the fixing plate (22), the top plates (23) are located in a gap between the two limiting sheets (13), the top plates (23) are elastically connected with the fixing plate (22) through connecting springs (24), and a shifting rod (25) is arranged on the outer side of the connecting seat (11);

and a limiting column (301) is arranged on an output shaft of the driving motor (3), and one end of the limiting column (301) is welded on the output shaft of the driving motor (3).

2. The low-noise axial flow fan for the rail transit according to claim 1, wherein: one end, far away from the protective cover (15), of the shell (1) is provided with a silencing cover (26), and the silencing cover (26) is fixedly connected with the shell (1) through screws.

3. The rail transit low-noise axial flow fan according to claim 1, characterized in that: the fan blade fixing seat (4) is of a hollow structure, and the fan blade fixing seat (4) is rotatably connected with an output shaft of the driving motor (3) through a first bearing (27).