CN210637257U

CN210637257U - Noise reduction type centrifugal fan

Info

Publication number: CN210637257U
Application number: CN201921445656.9U
Authority: CN
Inventors: 吴一明
Original assignee: Suzhou Yuwei Electric Co Ltd
Current assignee: Suzhou Yuwei Electric Co Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-05-29
Anticipated expiration: 2029-09-02

Abstract

The utility model discloses a noise reduction type centrifugal fan, which comprises a noise reduction centrifugal fan mechanism and a damping mechanism; the noise reduction centrifugal fan mechanism comprises: the noise reduction centrifugal fan mechanism comprises a trapezoidal mounting plate, wherein a round shell and a rectangular shell are arranged on the trapezoidal mounting plate, the rectangular shell is located on the right side of the round shell, the inside side of the round shell is provided with a sound absorbing cotton, the inner side of the sound absorbing cotton is provided with a motor, an output shaft of the motor penetrates through the rectangular shell, a rotating shaft is arranged on the output shaft of the motor, blades are distributed on the side surface of the rotating shaft in an array mode, an annular noise absorbing hole plate is arranged inside the rectangular shell, the annular noise absorbing hole plate wraps the outer side of the blades, the noise reduction centrifugal fan can be segmented and reduced, the noise reduction effect is improved, the damping can be carried out on the centrifugal fan, the service life of the fire-fighting smoke exhaust fan is not influenced, and the use is convenient for users.

Description

Noise reduction type centrifugal fan

Technical Field

The utility model relates to a centrifugal fan technical field specifically is a type of making an uproar centrifugal fan falls.

Background

The smoke exhaust fan is a machine capable of rapidly exhausting peculiar smell, high temperature and oil smoke gas, and is characterized by good high temperature resistance and high efficiency, the types of the fan are centrifugal fan, axial flow fan, centrifugal fan and axial flow fan, the fan is suitable for small and large machines according to the space size and the arrangement condition of a smoke exhaust hood, the fire-fighting high temperature smoke exhaust fan is suitable for ventilation or high temperature smoke exhaust of high-rise buildings, underground buildings, tunnels, drying rooms and the like, can continuously operate for more than thirty minutes under the high temperature condition of two hundred and eight ℃, does not damage each time when continuously operating for twenty hours under the condition of medium temperature of one hundred ℃, is an ideal fire-fighting necessary facility, the installation modes of the fan can be horizontal type and roof type, and has special requirements on performances such as air quantity, full pressure, installation size and the like, in the actual application, because the traditional fire-fighting smoke exhaust fan is mostly driven by a motor to exhaust smoke, and only provide one and fallen the district of making an uproar, can not realize the segmentation and fall the noise, the noise reduction effect is not good, easily produces vibrations at the operation in-process, can reduce fire control smoke exhaust fan working life when vibrations are too strong, not convenient to use person's use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a type of making an uproar centrifugal fan falls, can cut apart to fall and make an uproar this centrifugal fan, and then realize making an uproar falling in the segmentation, improve the noise reduction effect, can carry out the shock attenuation to this centrifugal fan moreover, do not influence fire control smoke exhaust fan working life, problem in the background art can effectively be solved in convenient to use person's use.

In order to achieve the above object, the utility model provides a following technical scheme: a noise reduction type centrifugal fan comprises a noise reduction centrifugal fan mechanism and a damping mechanism;

the noise reduction centrifugal fan mechanism comprises: the noise reduction centrifugal fan mechanism comprises a trapezoidal mounting plate, a round shell and a rectangular shell are arranged on the trapezoidal mounting plate, the rectangular shell is located on the right side of the round shell, a first sound absorption hole is arranged on the inner side of the round shell, a motor is arranged on the inner side of the first sound absorption hole, an output shaft of the motor penetrates through the rectangular shell, a rotating shaft is arranged on the output shaft of the motor, blades are distributed on the side surface of the rotating shaft in an array mode, an annular noise reduction hole plate is arranged inside the rectangular shell and wrapped outside the blades, an air outlet is arranged on the top side of the rectangular shell, an air inlet is arranged on the right side of the rectangular shell, and a second sound absorption hole is arranged on the inner side surfaces of the air outlet;

damping mechanism: the damping mechanism comprises a base, a positioning cylinder is arranged in an inner mounting groove of the base, a spring is placed in the positioning cylinder, and the top end of the spring is connected with a supporting column;

the ladder-shaped mounting plate is arranged in the mounting groove of the base, the top end of the supporting column is fixedly connected with the bottom side of the ladder-shaped mounting plate, and the input end of the motor is electrically connected with the output end of the external control switch.

Furthermore, the inside side of the mounting groove on the base is provided with a damping rubber block, and the damping rubber block is positioned on the side of the base and can damp when the trapezoidal mounting plate moves leftwards and rightwards.

Furthermore, two convex blocks are arranged on the front side and the rear side of the base, and mounting columns are connected to the convex blocks through threaded holes in a threaded mode, so that the centrifugal fan can be mounted conveniently.

Furthermore, the bottom side of the interior of the mounting groove on the base is provided with a positioning column, and the spring is sleeved on the side face of the positioning column, so that the spring can be positioned, and the spring is prevented from deviating.

Furthermore, one ends, far away from the rectangular shell, of the air inlet and the air outlet are provided with a flange plate and an annular stop block, and connecting holes are formed in the flange plate and the annular stop block in an array mode, so that external connecting pipes can be connected conveniently.

Compared with the prior art, the beneficial effects of the utility model are that: this type of making an uproar centrifugal fan falls has following benefit:

1. the cotton pair of motor work of inhaling of circular casing is sent the noise and is fallen when the motor work sends the noise, motor work makes the rotatory drive blade rotation of pivot, and then make the inside air current flow of rectangular casing produce the noise, and the air current passes through annular bloop board and makes an uproar falls for the secondary, and air current outflow rectangular casing produces the noise along air outlet and air intake flow friction, air outlet and air intake produce the noise through inhaling cotton two absorptions of sound, and then fall the noise once more, and then cut apart and fall the noise, and then realize the segmentation and fall the noise, improve the noise reduction effect.

2. This centrifugal fan during operation drives this centrifugal fan and shakes, and this centrifugal fan shakes and promotes the support column rebound and promote the spring along a location section of thick bamboo shrink, and then carries out the shock attenuation to this centrifugal fan, improves this centrifugal fan's life.

Drawings

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

fig. 2 is a schematic view of the sectional structure of the present invention.

In the figure: the sound absorption type vibration damper comprises a base 1, a trapezoidal mounting plate 2, a circular shell 3, a rectangular shell 4, an air outlet 5, an annular stop block 6, a connecting hole 7, a flange 8, an air inlet 9, an annular sound attenuation hole plate 10, a mounting column 11, a bump 12, a positioning column 13, a spring 14, a positioning cylinder 15, a supporting column 16, a damping rubber block 17, a sound absorption cotton I18, a motor 19, a sound absorption cotton II 20, a rotating shaft 21 and blades 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a noise reduction type centrifugal fan comprises a noise reduction centrifugal fan mechanism and a damping mechanism; the noise reduction centrifugal fan mechanism comprises: the noise reduction centrifugal fan mechanism comprises a trapezoidal mounting plate 2, a round shell 3 and a rectangular shell 4 are arranged on the trapezoidal mounting plate 2, the rectangular shell 4 is positioned on the right side of the round shell 3, a sound absorption cotton I18 is arranged on the inner side of the round shell 3, a motor 19 is arranged on the inner side of the sound absorption cotton I18, an output shaft of the motor 19 penetrates through the rectangular shell 4, a rotating shaft 21 is arranged on the output shaft of the motor 19, blades 22 are distributed on the side surface of the rotating shaft 21 in an array mode, an annular sound absorption pore plate 10 is arranged inside the rectangular shell 4, the annular sound absorption pore plate 10 is wrapped on the outer side of the blades 22, an air outlet 5 is arranged on the top side of the rectangular shell 4, an air inlet 9 is arranged on the right side of the rectangular shell 4, sound absorption cotton II 20 is arranged on the inner side surfaces of the air outlet 5 and the air inlet 9, the motor 19 works to enable the rotating shaft 21 to rotate to drive the blades 22 to rotate, so that air flow in the rectangular shell 4 generates noise, the air flow passes through the annular silencing hole plate 10 and carries out secondary noise reduction, the air flow flows out of the rectangular shell 4 and flows along the air outlet 5 and the air inlet 9 to rub to generate noise, the noise generated by the air outlet 5 and the air inlet 9 is absorbed by the sound absorption cotton II 20, the noise is reduced again, the noise is segmented and reduced, and therefore segmented noise reduction is achieved, and the noise reduction effect is improved; the one end that rectangle casing 4 was kept away from to air intake 9 and air outlet 5 is equipped with ring flange 8 and annular dog 6, and connecting hole 7 has been seted up to the array on ring flange 8 and the annular dog 6, and the external connection pipe of being convenient for is connected, damper: the damping mechanism comprises a base 1, a positioning cylinder 15 is arranged in an inner mounting groove of the base 1, a spring 14 is arranged in the positioning cylinder 15, the top end of the spring 14 is connected with a supporting column 16, the centrifugal fan drives the centrifugal fan to vibrate when in work, the centrifugal fan vibrates to push the supporting column 16 to move downwards to push the spring 14 to contract along the positioning cylinder 15, the centrifugal fan is damped, and the service life of the centrifugal fan is prolonged; the inside side of the mounting groove on base 1 is equipped with yielding rubber block 17, yielding rubber block 17 is located base 1's side, can control when removing trapezoidal mounting panel 2 and shock attenuation, the inside bottom side of the mounting groove on base 1 is equipped with reference column 13, spring 14 cup joints the side at reference column 13, can fix a position spring 14, avoid spring 14 to take place the skew, wherein, trapezoidal mounting panel 2 is established at base 1's mounting groove, the top of support column 16 and trapezoidal mounting panel 2's bottom side fixed connection, motor 19's input is connected with external control switch's output electricity, both sides are equipped with two lugs 12 around base 1, there is erection column 11 through screw hole threaded connection on lug 12, be convenient for this centrifugal fan's installation.

When in use: when the motor 19 works to generate noise, the sound absorption cotton I18 in the circular shell 3 reduces the noise generated by the working of the motor 19, the motor 19 works to enable the rotating shaft 21 to rotate to drive the moving blade 22 to rotate, thereby leading the air flow inside the rectangular shell 4 to generate noise, leading the air flow to pass through the annular silencing orifice plate 10 and carrying out secondary noise reduction, the air flow flowing out of the rectangular shell 4 flows along the air outlet 5 and the air inlet 9 to rub to generate noise, the noise generated by the air outlet 5 and the air inlet 9 is absorbed by the second sound-absorbing cotton 20, further reducing noise again, further cutting noise reduction, further realizing segmented noise reduction, improving noise reduction effect, this centrifugal fan during operation drives this centrifugal fan and shakes, and this centrifugal fan shakes and promotes 16 downstream promotion springs 14 along the shrink of a location section of thick bamboo 15 of support column, and then carries out the shock attenuation to this centrifugal fan, improves this centrifugal fan's life.

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 type of making an uproar centrifugal fan falls which characterized in that: the device comprises a noise reduction centrifugal fan mechanism and a damping mechanism;

the noise reduction centrifugal fan mechanism comprises: the noise-reduction centrifugal fan mechanism comprises a trapezoidal mounting plate (2), wherein a round shell (3) and a rectangular shell (4) are arranged on the trapezoidal mounting plate (2), the rectangular shell (4) is located on the right side of the round shell (3), a sound-absorbing cotton (18) is arranged on the side face of the round shell (3), a motor (19) is arranged on the inner side of the sound-absorbing cotton (18), an output shaft of the motor (19) penetrates through the rectangular shell (4), a rotating shaft (21) is arranged on the output shaft of the motor (19), blades (22) are distributed on the side face of the rotating shaft (21) in an array manner, an annular noise-reducing pore plate (10) is arranged inside the rectangular shell (4), the annular noise-reducing pore plate (10) is wrapped outside the blades (22), an air outlet (5) is arranged on the top side of the rectangular shell (4), and an air inlet (9) is arranged on the right side of, and the inner side surfaces of the air outlet (5) and the air inlet (9) are provided with a second sound-absorbing cotton (20);

damping mechanism: the damping mechanism comprises a base (1), a positioning cylinder (15) is arranged in an inner mounting groove of the base (1), a spring (14) is placed in the positioning cylinder (15), and the top end of the spring (14) is connected with a supporting column (16);

the ladder-shaped mounting plate (2) is arranged in a mounting groove of the base (1), the top end of the supporting column (16) is fixedly connected with the bottom side of the ladder-shaped mounting plate (2), and the input end of the motor (19) is electrically connected with the output end of the external control switch.

2. The noise reduction type centrifugal fan according to claim 1, wherein: the damping rubber block (17) is arranged on the inner side face of the mounting groove in the base (1), and the damping rubber block (17) is located on the side face of the base (1).

3. The noise reduction type centrifugal fan according to claim 1, wherein: two convex blocks (12) are arranged on the front side and the rear side of the base (1), and mounting columns (11) are connected to the convex blocks (12) through threaded holes in a threaded mode.

4. The noise reduction type centrifugal fan according to claim 1, wherein: a positioning column (13) is arranged on the bottom side of the inner portion of the mounting groove on the base (1), and the spring (14) is sleeved on the side face of the positioning column (13).

5. The noise reduction type centrifugal fan according to claim 1, wherein: one ends, far away from the rectangular shell (4), of the air inlet (9) and the air outlet (5) are provided with a flange plate (8) and an annular stop block (6), and connecting holes (7) are formed in the flange plate (8) and the annular stop block (6) in an array mode.