CN218817088U

CN218817088U - Noise-reduction centrifugal fan

Info

Publication number: CN218817088U
Application number: CN202222896395.0U
Authority: CN
Inventors: 朱建亮; 薛兵; 董高波; 杨林霞; 杨祝成; 夏正茂
Original assignee: Shenyang Shengxi Blower Co ltd
Current assignee: Shenyang Shengxi Blower Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-04-07
Anticipated expiration: 2032-11-01

Abstract

The utility model relates to the technical field of fans, in particular to a noise-reducing centrifugal fan; including the bottom plate and the device of making an uproar falls, the bottom plate has the mounting hole, the device of making an uproar falls includes the spiral case, the sound absorption pad, the apron, air inlet tube and runner assembly, in using, after the runner assembly action, will provide input mechanical energy, gaseous alright get into the inside centrifugal chamber of spiral case through air inlet tube, thereby alright improve gas pressure and discharge gas, and the runner assembly is at the during operation, will produce very big whistle noise because of high-speed rotation, at this moment, the whistle noise that produces will be absorbed the processing by the sound absorption pad of installing in the spiral case, thereby realize at centrifugal fan during operation, when its inside commentaries on classics leaf high-speed rotation, can carry out the effective processing to whistle noise that it produced, avoid the noise outwards to propagate, form sound pollution.

Description

Noise-reduction centrifugal fan

Technical Field

The utility model relates to a fan technical field, concretely relates to centrifugal fan of making an uproar falls.

Background

Centrifugal fan is the mechanical energy through the input, improve gas pressure and discharge gaseous mechanical equipment, belong to driven fluid machinery, extensively be used for the mine, the mill, fields such as building, centrifugal fan at the during operation, will produce very big noise, thereby influence the use, adopt the external protection mostly at first, when the staff gets into centrifugal fan work area promptly, wear the protection earmuff, in order to reduce the noise injury, but vibrations and the noise that the centrifugal fan during operation produced can not reduce, still be not convenient for keep good operational environment.

Prior art CN212838534U discloses a noise reduction type centrifugal fan, comprising: centrifugal fan body, base, roof, backup pad, gyro wheel, damping device, the backup pad is vertical to be installed on the base, and the top in the backup pad is installed to the roof, and the roof passes through the backup pad to be installed in the base top, and the gyro wheel has a plurality of sides of installing in the backup pad, and the centrifugal fan body is installed in the base top and the centrifugal fan body is located between base and the roof, damping device install the centrifugal fan body with between the base. The utility model is provided with a plurality of rollers at the side of the supporting plate, and the device is supported on the ground through the rollers after being placed at the side, thereby facilitating the movement of the device; simultaneously this practicality is new installs damping device between centrifugal fan body and bottom plate, reduces the vibrations that centrifugal fan during operation produced, and the noise reduction is favorable to providing good operational environment and keeps.

When the centrifugal fan is used, if only the damping device is arranged between the centrifugal fan body and the bottom plate, vibration generated during the working of the centrifugal fan is reduced, only the vibration of the centrifugal fan body can be reduced, and partial noise generated during the working vibration of the centrifugal fan is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the noise-reduction centrifugal fan is capable of effectively processing the generated wind whistle noise when the internal rotating blades rotate at a high speed when the centrifugal fan works, and preventing the noise from spreading outwards to form sound pollution.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a noise reduction centrifugal fan, which comprises a bottom plate, wherein the bottom plate is provided with a mounting hole, the mounting hole penetrates through the bottom plate and is positioned on one side of the bottom plate, and the noise reduction centrifugal fan also comprises a noise reduction device;

the noise reduction device comprises a volute, a sound absorption pad, a cover plate, an air inlet cylinder and a rotating assembly, wherein the volute is located on one side of the bottom plate, the sound absorption pad is fixedly connected with the volute and located in the volute, the cover plate is fixedly connected with the volute and located on one side of the volute, the air inlet cylinder is fixedly connected with the cover plate and communicated with the volute, the air inlet cylinder is located close to the cover plate on one side of the volute, and the rotating assembly is arranged on one side of the volute.

The volute is provided with a gas outlet convex cavity, and the gas outlet convex cavity is communicated with the volute and is positioned on one side of the volute.

The noise reduction device further comprises a damping plate, the damping plate is fixedly connected with the bottom plate, fixedly connected with the volute and located on one side, close to the volute, of the bottom plate.

The rotating assembly comprises a rotating motor and a rotating vane, and the rotating motor is fixedly connected with the volute and is positioned on one side of the volute; the rotating blade is fixedly connected with an output shaft of the rotating motor and is positioned in the volute.

The noise reduction device further comprises a T-shaped cylinder and a mouth-shaped pad, wherein the T-shaped cylinder is fixedly connected with the volute and is positioned in the air outlet convex cavity; the mouth-shaped pad is fixedly connected with the T-shaped cylinder and is positioned in the T-shaped cylinder.

The utility model discloses a make an uproar centrifugal fan falls, the bottom plate has the mounting hole, the equipment of being convenient for is installed fast, the spiral case is located bottom plate one side, the inside plenum of spiral case adopts centrifugal setting, the sound absorption pad is installed on the inside annular wall of spiral case, the apron is installed on the spiral case, be used for the spiral case to seal, the admission cylinder is installed on the apron, and link up with the spiral case, the air guide of being convenient for, rotating assembly sets up in spiral case one side, during the use, the rotating assembly action, provide input mechanical energy, it is gaseous in the inside centrifugal chamber of spiral case that the admission cylinder gets into, thereby alright improve gas pressure and discharge gas, and rotating assembly is at the during operation, will produce very big tsunami noise because of high-speed rotation, at this moment, the wind noise that produces will be absorbed the sound absorption pad that can be installed in the spiral case, thereby realize at centrifugal fan during operation, when its inside rotary vane is high-speed rotatory, can carry out effective processing to the tsunami noise that it produced, avoid the noise outwards to propagate, form sound pollution.

Drawings

The invention can be further illustrated by means of non-limiting examples given in the figures.

Fig. 1 is the overall structure schematic diagram of the noise reduction centrifugal fan according to the first embodiment of the present invention.

Fig. 2 is a schematic structural view of the sound absorption pad according to the first embodiment of the present invention.

Fig. 3 is a schematic view of the overall structure of the noise-reducing centrifugal fan according to the second embodiment of the present invention.

Fig. 4 is a schematic structural view of a T-shaped tube according to a second embodiment of the present invention.

In the figure: 101-bottom plate, 102-mounting hole, 103-volute, 104-sound absorption pad, 105-cover plate, 106-air inlet cylinder, 107-air outlet convex cavity, 108-damping plate, 109-rotating motor, 110-rotating blade, 201-T-shaped cylinder and 202-mouth-shaped pad.

Detailed Description

In order to make the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.

The first embodiment is as follows:

as shown in fig. 1 and fig. 2, fig. 1 is an overall structure schematic diagram of the noise reduction centrifugal fan, fig. 2 is a structure schematic diagram of the sound absorption pad, the utility model provides a noise reduction centrifugal fan: comprises a bottom plate 101 and a noise reduction device, wherein the noise reduction device comprises a volute 103, a sound absorption pad 104, a cover plate 105, an air inlet cylinder 106 and a rotating assembly, and the rotating assembly comprises a rotating motor 109 and a rotating blade 110. According to the scheme, when the centrifugal fan works, the rotating blade 110 inside the centrifugal fan can effectively process the wind and whistle noise generated by the rotating blade when the rotating blade rotates at a high speed, the noise is prevented from being spread outwards, and sound pollution is formed.

In this embodiment, the bottom plate 101 has mounting holes 102, the mounting holes 102 penetrate the bottom plate 101 and are located on one side of the bottom plate 101, and the bottom plate 101 is provided with a plurality of mounting holes 102, which facilitates the fixed mounting of the centrifugal fan.

The scroll 103 is located on one side of the base plate 101, the sound absorption pad 104 is fixedly connected to the scroll 103 and located in the scroll 103, the cover plate 105 is fixedly connected to the scroll 103 and located on one side of the scroll 103, the air inlet cylinder 106 is fixedly connected to the cover plate 105 and is communicated with the scroll 103 and located on one side of the cover plate 105 close to the scroll 103, the rotating assembly is disposed on one side of the scroll 103, the scroll 103 is located on one side of the base plate 101, the air chamber inside the scroll 103 is a centrifugal air chamber, the sound absorption pad 104 is mounted on an inner annular wall of the air chamber of the scroll 103 by bolts, the cover plate 105 is mounted on the scroll 103 by bolts for sealing and protecting the scroll 103, the cross section of the air inlet cylinder 106 is i-shaped and is mounted on the cover plate 105 by bolts and is communicated with the centrifugal chamber of the scroll 103 after mounting, and the rotating assembly is disposed on one side of the scroll 103 for providing mechanical energy to increase pressure and discharge gas.

Secondly, the volute 103 is provided with an air outlet convex cavity 107, the air outlet convex cavity 107 is communicated with the volute 103 and is positioned on one side of the volute 103, the air outlet convex cavity 107 is arranged on the side surface of the top of the volute 103, so that air flow is conveniently discharged from a centrifugal chamber of the volute 103, and sound insulation cotton is coated outside the air outlet convex cavity 107.

Then, the damping plate 108 with bottom plate 101 fixed connection, and with spiral case 103 fixed connection, and be located bottom plate 101 is close to spiral case 103 one side, damping plate 108 adopts the effectual rubber slab of shock attenuation, and installs through the bolt on bottom plate 101, spiral case 103 passes through the bolt and installs on damping plate 108, at centrifugal fan during operation, it will produce vibrations, through damping plate 108, alright reduce the vibrations that centrifugal fan work produced to reduce the operating noise, carry out noise reduction.

Finally, the rotating motor 109 is fixedly connected with the volute 103 and located on one side of the volute 103, the rotating vane 110 is fixedly connected with an output shaft of the rotating motor 109 and located in the volute 103, the rotating motor 109 is mounted on the volute 103 through a bolt, the rotating vane 110 is mounted on the output shaft of the rotating motor 109 through a flat key and a locking bolt, and when the gas turbine works, the rotating motor 109 acts to drive the rotating vane 110 to rotate, so that mechanical energy is provided, and gas is subjected to pressure improvement and is discharged.

When the utility model is used, the centrifugal fan is to the whistle noise that the high-speed work of rotary vane 110 produced when making an uproar fall, at first with the equipment through a plurality of mounting hole 102 install fixedly, then will the gas inlet side of air inlet tube 106 is connected with the gas outlet of external equipment, will give vent to anger protruding chamber 107 top and external equipment's input side and be connected, then, control rotate motor 109 action, drive rotary vane 110 is rotatory to alright mechanical energy provides, and produces suction, and gaseous can be followed air inlet tube 106 is inhaled in the centrifugal chamber of spiral case 103, then, through rotation motor 109 with rotary vane 110 cooperation action, can carry out pressure promotion to gaseous, and through give vent to anger protruding chamber 107 and discharge, simultaneously, rotary vane 110 will produce very big whistle noise when high-speed rotatory, and the whistle noise that produces will be can by sound absorption pad 104 carries out the absorption processing to the noise that can fall makes an uproar, and then realizes that its inside when centrifugal fan works, rotary vane 110 when high-speed rotatory, can handle its produced whistle noise effectively to propagate, avoids the whistle noise to form the pollution to outside.

Example two:

as shown in fig. 3 and fig. 4, wherein fig. 3 is an overall structural schematic diagram of the noise reduction centrifugal fan, and fig. 4 is a structural schematic diagram of a T-shaped cylinder, on the basis of the first embodiment, the utility model provides a noise reduction centrifugal fan, the noise reduction device further includes a T-shaped cylinder 201 and a mouth-shaped pad 202.

The T-shaped cylinder 201 is fixedly connected with the volute 103 and is located in the convex air outlet cavity 107, the mouth-shaped pad 202 is fixedly connected with the T-shaped cylinder 201 and is located in the T-shaped cylinder 201, the T-shaped cylinder 201 is installed in the convex air outlet cavity 107 through bolts, and the mouth-shaped pad 202 is made of sound-absorbing materials and is installed in the T-shaped cylinder 201 through bolts.

Although the sound insulation cotton is coated outside the air outlet convex cavity 107, the air outlet convex cavity can isolate noise, but is easy to be damaged by external impact, at this time, the mouth-shaped pad 202 can be installed in the T-shaped cylinder 201 through bolts, then the T-shaped cylinder 201 is installed in the air outlet convex cavity 107 through bolts, when air flow is discharged from the air outlet convex cavity 107, noise generated by the air flow moving at high speed can pass through the mouth-shaped pad 202 and is absorbed and processed by the mouth-shaped pad 202, and noise reduction is realized.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A noise-reducing centrifugal fan comprises a bottom plate, wherein the bottom plate is provided with a mounting hole which penetrates through the bottom plate and is positioned on one side of the bottom plate,

the noise reduction device is also included;

the noise reduction device comprises a volute, a sound absorption pad, a cover plate, an air inlet cylinder and a rotating assembly, wherein the volute is located on one side of the bottom plate, the sound absorption pad is fixedly connected with the volute and located in the volute, the cover plate is fixedly connected with the volute and located on one side of the volute, the air inlet cylinder is fixedly connected with the cover plate and communicated with the volute, the air inlet cylinder is located on one side of the volute, the cover plate is close to one side of the volute, and the rotating assembly is arranged on one side of the volute.

2. A noise-reducing centrifugal fan according to claim 1,

3. A noise reducing centrifugal fan according to claim 1,

4. A noise-reducing centrifugal fan according to claim 1,

the rotating assembly comprises a rotating motor and a rotating blade, and the rotating motor is fixedly connected with the volute and is positioned on one side of the volute; the rotating vane is fixedly connected with an output shaft of the rotating motor and is positioned in the volute.

5. A noise reducing centrifugal fan according to claim 2,

the noise reduction device also comprises a T-shaped cylinder and a mouth-shaped pad, wherein the T-shaped cylinder is fixedly connected with the volute and is positioned in the air outlet convex cavity; the mouth-shaped pad is fixedly connected with the T-shaped cylinder and is positioned in the T-shaped cylinder.