CN219509898U

CN219509898U - Noise reduction structure of centrifugal fan

Info

Publication number: CN219509898U
Application number: CN202223322177.2U
Authority: CN
Inventors: 唐波
Original assignee: Yunnan Gaopu Hvac Equipment Co ltd
Current assignee: Yunnan Gaopu Hvac Equipment Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-08-11
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a noise reduction structure of a centrifugal fan, and belongs to the technical field of centrifugal fans; the fan comprises a base, a fan shell, an impeller and a motor, wherein the motor is fixedly arranged on the base, one side of an output end of the motor is provided with the fan shell, the impeller is positioned inside the fan shell and is connected with the output end of the motor for rotation, an air inlet and an air outlet are formed in the fan shell, the fan further comprises a noise reduction assembly arranged at the air outlet, the noise reduction assembly comprises a noise reduction pipe and a noise reduction plate, the noise reduction plate is obliquely arranged at the lower part of the noise reduction pipe and divides a pipeline cavity at the lower part of the noise reduction pipe into a plurality of air channels with horn-shaped cross sections, and noise reduction cotton is arranged on the inner wall of the upper part in the noise reduction pipe; the utility model can reduce the noise of the centrifugal fan in an omnibearing way and improve the running environment of the centrifugal fan.

Description

Noise reduction structure of centrifugal fan

Technical Field

The utility model relates to a noise reduction structure of a centrifugal fan, and belongs to the technical field of centrifugal fans.

Background

The centrifugal fan is a machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and is a driven fluid machine. Centrifugal fans are widely used for ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induced draft of boilers and industrial kilns; cooling and ventilation in air-conditioning devices and household appliances; drying and selecting grains; inflation and propulsion of wind tunnel wind source and air cushion ship, etc.

However, centrifugal fans produce significant noise when operated, the source of which is vibration of the machine operation on the one hand and frictional vibration of the air flow as it passes through the centrifugal fan cavity on the other hand. In a workshop, corresponding measures are needed to reduce noise generated by the centrifugal fan and improve the operation environment of the centrifugal fan.

The foregoing is not necessarily a prior art, and falls within the technical scope of the inventors.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a noise reduction structure of a centrifugal fan.

The technical scheme adopted by the utility model is as follows: the centrifugal fan noise reduction structure comprises a base, a fan shell, an impeller and a motor, wherein the base, the fan shell, the impeller and the motor are existing in the prior art, the motor is fixedly arranged on the base through bolts, the fan shell is arranged on one side of an output end of the motor, the impeller is positioned in the fan shell and is connected with the output end of the motor for rotation, an air inlet and an air outlet are formed in the fan shell, the air inlet is positioned right in front of the fan shell, and the air outlet is positioned at the left upper part of the fan shell; the noise reduction assembly is characterized by further comprising a noise reduction assembly arranged at the air outlet, the noise reduction assembly comprises a noise reduction pipe and noise reduction plates, the noise reduction plates are obliquely arranged at the lower part of the noise reduction pipe and divide a pipeline cavity at the lower part of the noise reduction pipe into a plurality of air channels with horn-shaped cross sections, noise reduction cotton is arranged on the inner wall of the upper part in the noise reduction pipe, the lower ends of the noise reduction cotton extend to the wall of the noise reduction pipe between the adjacent noise reduction plates at the lower part of the noise reduction pipe, and one layer of noise reduction cotton is arranged on the side surface of the noise reduction plates, which is positioned at one side of the air channels.

Further, the noise reduction pipe is a rectangular pipe, and at least three air channels are arranged in the noise reduction pipe.

Further, the noise reduction plate is a rectangular plate, and the lower end of the noise reduction plate is provided with a slope surface, so that the lower end of the noise reduction plate is clung to the wall of the noise reduction pipe and does not form a protruding obstacle, the wind flow smoothly passes through, and noise is reduced.

Further, the fan shell comprises an outer layer, an inner layer and a cavity layer arranged between the outer layer and the inner layer, wherein the inner layer is a sound insulation cotton layer, the edges of the inner layer and the outer layer are connected all around, and the inner layer and the outer layer can be connected and supported through small cylinders, transverse bars and the like in a reinforcing mode.

Further, this design still includes the case of making an uproar falls, the base under motor and the motor is by the cage in the case of making an uproar falls, the case inner wall of making an uproar falls covers the cotton of one deck amortization, reduces the noise that the motor produced.

Further, this design still includes bearing subassembly, bearing subassembly includes arc layer board and connects fagging and gusset between arc layer board and base, arc layer board and fan housing lower extreme laminating are provided with one deck elastic buffer layer between the two.

Further, the elastic buffer layer is a rubber layer.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the noise reduction pipe and the noise reduction plate are arranged at the air outlet of the fan shell, wherein the noise reduction plate is used for guiding wind at the air outlet, so that the phenomenon of noise caused by turbulent flow in the air outlet is prevented, the noise reduction effect is realized, and the wind at the air outlet is converged at the upper middle part of the noise reduction pipe to form a whole strand for discharge after being guided by the noise reduction plate, so that the subsequent use is facilitated; in the whole process, noise reduction cotton on the noise reduction plate and the inner wall of the noise reduction pipe also plays a role in noise reduction at the same time, so that noise is further reduced.

The fan shell is also provided with a three-layer structure, the cavity layer and the noise reduction cotton layer can greatly reduce noise generated when air flows through the inner cavity of the centrifugal fan, and in addition, the motor is partially covered in the noise reduction box, so that vibration noise of motor operation is reduced; the bottom of the fan shell is fastened, abutted and supported through the bearing assembly, so that the vibration space is reduced, the vibration is enhanced and stabilized, the vibration is reduced, and the generated vibration is absorbed and buffered through the elastic buffer layer; the structure combines the noise reduction assembly arranged at the air outlet, and each part of the centrifugal fan is subjected to noise reduction in a targeted manner, so that the purpose of reducing noise generated when the centrifugal fan operates is achieved to the greatest extent, and the operation environment of the centrifugal fan is improved to a certain extent.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an isometric view of the present utility model.

Fig. 2 is a schematic view of a hidden noise reduction box according to the present utility model.

FIG. 3 is a schematic diagram of an assembled cross-sectional view of a blower housing and noise reduction assembly of the present utility model.

Figure 4 is a schematic view of a support assembly according to the present utility model.

In the figure: 1-base, 2-blower housing, 3-motor, 4-air intake, 5-noise reduction pipe, 6-noise reduction board, 7-noise reduction cotton, 8-outer layer, 9-inner layer, 10 cavity layer, 11-noise reduction box, 12-bearing subassembly, 13-elastic buffer layer.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Furthermore, in the description of the present utility model, unless otherwise indicated, the terms "plurality," "plurality of sets" and "plurality" are used in the sense of two or more, and the terms "plurality," "plurality of sets" and "plurality" are used in the sense of one or more. In the description of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are merely used for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

As shown in fig. 1-4: the utility model provides a centrifugal fan structure of making an uproar falls, includes base 1, fan housing 2, impeller and motor 3, motor 3 installs and is fixed in on the base 1, and its output one side sets up fan housing 2, the impeller is located inside fan housing 2 and is connected with motor 3 output and rotate, be provided with air intake 4 and air outlet on the fan housing 2, it still includes the subassembly of making an uproar falls in the air outlet through the bolt assembly installation, the subassembly of making an uproar falls including making an uproar falls pipe 5 and the board of making an uproar 6 falls, the board of making an uproar 6 slope is installed in the lower part of making an uproar pipe 5 and is separated the pipeline chamber of making an uproar pipe 5 lower part into a plurality of cross sections and be the wind channel that loudspeaker is, specifically, the pipe of making an uproar 5 of making an uproar is the rectangular pipe, and its inside wind channel sets up three. The inner wall of the middle upper part of the noise reduction pipe 5 is provided with noise reduction cotton 7, the lower end of the noise reduction cotton 7 extends to the wall of the noise reduction pipe 5 between adjacent noise reduction plates 6 at the lower part of the noise reduction pipe 5, and the side surface of the noise reduction plate 6 positioned at one side of the air duct is provided with a layer of noise reduction cotton 7. The noise reduction plate 6 is a rectangular plate, and the lower end of the noise reduction plate is provided with a slope surface.

The fan housing 2 comprises an outer layer 8, an inner layer 9 and a cavity layer 10 positioned between the outer layer 8 and the inner layer 9, wherein the inner layer 9 is a sound insulation cotton layer. The embodiment further comprises a noise reduction box 11, the motor 3 and the base 1 right below the motor 3 are covered in the noise reduction box 11, and a layer of noise reduction cotton 7 is covered on the inner wall of the noise reduction box 11. The novel fan blower is characterized by further comprising a bearing assembly 12 fixed on the base in a welded mode, wherein the bearing assembly 12 comprises an arc-shaped supporting plate, a supporting plate and a rib plate, the supporting plate and the rib plate are connected between the arc-shaped supporting plate and the base 1, the arc-shaped supporting plate is attached to the lower end of the fan blower housing 2, and an elastic buffer layer 13 is arranged between the arc-shaped supporting plate and the lower end of the fan blower. The elastic buffer layer 13 is a rubber layer.

While the present utility model has been described in detail with reference to the drawings, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present utility model within the knowledge of those skilled in the art.

Claims

1. The utility model provides a centrifugal fan structure of making an uproar falls, includes base (1), fan housing (2), impeller and motor (3), motor (3) installation is fixed in on base (1), and its output one side sets up fan housing (2), the impeller is located inside fan housing (2) and rotates with motor (3) output connection, be provided with air intake (4) and air outlet on fan housing (2), its characterized in that: the noise reduction assembly is characterized by further comprising a noise reduction assembly arranged at the air outlet, the noise reduction assembly comprises a noise reduction pipe (5) and a noise reduction plate (6), the noise reduction plate (6) is obliquely arranged at the lower part of the noise reduction pipe (5) and divides a pipeline cavity at the lower part of the noise reduction pipe (5) into a plurality of air channels with horn-shaped cross sections, noise reduction cotton (7) is arranged on the inner wall of the upper part of the noise reduction pipe (5), the lower end of the noise reduction cotton (7) extends to the wall of the noise reduction pipe (5) between the adjacent noise reduction plates (6) at the lower part of the noise reduction pipe (5), and one layer of noise reduction cotton (7) is arranged on the side surface of the noise reduction plate (6) at one side of the air channel.

2. The centrifugal fan noise reduction structure according to claim 1, wherein: the noise reduction pipe (5) is a rectangular pipe, and at least three air channels are arranged in the noise reduction pipe.

3. The centrifugal fan noise reduction structure according to claim 2, wherein: the noise reduction plate (6) is a rectangular plate, and the lower end of the noise reduction plate is provided with a slope surface.

4. A centrifugal fan noise reduction structure according to claim 3, wherein: the fan housing (2) comprises an outer layer (8), an inner layer (9) and a cavity layer (10) arranged between the outer layer (8) and the inner layer (9), wherein the inner layer (9) is a sound insulation cotton layer.

5. The centrifugal fan noise reduction structure according to claim 4, wherein: the noise reduction box is characterized by further comprising a noise reduction box (11), wherein the motor (3) and the base (1) under the motor (3) are covered in the noise reduction box (11), and a layer of noise reduction cotton (7) is covered on the inner wall of the noise reduction box (11).

6. The centrifugal fan noise reduction structure according to claim 5, wherein: the novel air blower is characterized by further comprising a bearing assembly (12), wherein the bearing assembly (12) comprises an arc-shaped supporting plate, a supporting plate and a rib plate, the supporting plate and the rib plate are connected between the arc-shaped supporting plate and the base (1), the arc-shaped supporting plate is attached to the lower end of the blower housing (2), and an elastic buffer layer (13) is arranged between the arc-shaped supporting plate and the lower end of the blower housing.

7. The centrifugal fan noise reduction structure according to claim 6, wherein: the elastic buffer layer (13) is a rubber layer.