CN216767803U

CN216767803U - Novel low-noise centrifugal fan

Info

Publication number: CN216767803U
Application number: CN202122866518.1U
Authority: CN
Inventors: 张强; 李利涛; 周道先; 时建国
Original assignee: Henan Dajing Fan Technology Co ltd
Current assignee: Henan Dajing Fan Technology Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-06-17
Anticipated expiration: 2031-11-22

Abstract

The utility model discloses a novel low-noise centrifugal fan which comprises a box body, wherein sound insulation boards are arranged on the inner wall of the box body, reinforcing ribs are arranged between the inner walls of the box body, a fan shell is arranged in the middle of the box body, an air outlet is formed in one side of the fan shell, an air inlet is formed in the middle of the fan shell and communicated with the box body, fan blades are arranged in the fan shell, a rubber damping strip is arranged on the fan shell along an outline line, a telescopic rod is arranged at the bottom of the box body, a bottom plate is arranged at the bottom of the telescopic rod, a damping spring is arranged on the outer side of the telescopic rod, a motor installation box is arranged on the rear side of the box body, a motor is arranged in the motor installation box, the output end of the motor penetrates through the box body and is connected with the fan blades, and a rubber damping ring is arranged on the outer side of the motor. The rubber damping ring is arranged on the outer side of the motor, so that the motor is low in noise; the rubber damping strips are arranged on the edges of the contour lines on the two sides of the fan shell, so that the fan shell is low in vibration noise; through strengthening rib reinforcement box both sides connection degree, noise in the acoustic celotex board absorbed box, damping spring cushions the box and bottom plate junction, and it is little to realize box vibration noise.

Description

Novel low-noise centrifugal fan

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a novel low-noise centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which increases the gas pressure and discharges gas by means of input mechanical energy, and is widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

The traditional centrifugal fan usually only pays attention to fan efficiency, the noise problem of the centrifugal fan is neglected, along with the continuous promotion of the industrialization process of China, the centrifugal fan is taken as an important corollary device of industry, needs to be advanced with time, a plurality of factories provide new requirements for the noise influence degree, and the design of a low-noise novel centrifugal fan is particularly important.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel low-noise centrifugal fan which has the advantages of low motor noise, low fan shell vibration noise, low box body vibration noise and the like, and solves the problems that the centrifugal fan has high noise and cannot meet new requirements of factories on noise influence degree under new conditions and the like.

In order to achieve the purpose, the utility model provides the following technical scheme: a novel low-noise centrifugal fan comprises a box body, wherein sound insulation boards are fixedly connected to the inner wall of the box body, reinforcing ribs are fixedly connected between the inner walls of the box body, a fan shell is fixedly arranged in the middle of the box body, an air outlet is formed in one side of the fan shell, the air outlet is communicated with the box body, an air inlet is formed in the middle of the fan shell and communicated with the box body, fan blades are rotatably arranged in the fan shell, rubber damping strips are fixedly connected to two sides of the fan shell along contour lines and are in contact connection with the inner wall of the box body, telescopic rods are fixedly connected to four corners of the bottom of the box body, a bottom plate is fixedly connected to the bottom of each telescopic rod, damping springs are movably arranged on the outer sides of the telescopic rods, a motor installation box is arranged on the rear side of the box body, a motor is cooperatively installed in the motor installation box, and the output end of the motor penetrates through the box body and is rotatably connected with the fan blades, the equidistance cooperation in the motor outside is provided with rubber shock ring, and rubber shock ring and motor install bin inner wall contact are connected.

As a further description of the above technical solution:

the four corners of the bottom surface of the bottom plate are rotatably connected with universal wheels.

As a further description of the above technical solution:

the side of the box body is square, and the box body is made of iron.

As a further description of the above technical solution:

the thickness of the sound insulation plate is twice of that of the box body.

As a further description of the above technical solution:

the length and the width of the bottom plate are both larger than those of the box body.

As a further description of the above technical solution:

the four reinforcing ribs are arranged at four corners of the inner wall of the box body respectively.

As a further description of the above technical solution:

the rubber shock absorption rings are three and are respectively arranged at the front end, the middle part and the rear end of the motor.

The utility model has the following beneficial effects:

1. the centrifugal fan adopts the rubber damping ring, and the rubber damping ring is arranged between the outer side of the motor and the motor installation box, so that the vibration effect on the motor installation box when the motor works is reduced, the noise of the motor is reduced, the noise of the centrifugal fan during working is reduced, and the centrifugal fan can better meet the noise environment-friendly requirement;

2. the rubber damping strips are arranged on the edges of the contour lines on the two sides of the fan shell, and the rubber damping strips on the two sides are in contact with the box body to provide a buffering effect for the fan shell, so that the vibration amplitude of the fan shell is reduced when the fan works, the vibration noise of the fan shell is reduced, the noise of the centrifugal fan during working is reduced, and the centrifugal fan meets the noise environmental protection requirement;

3. this centrifugal fan is owing to adopted strengthening rib, acoustic celotex board, damping spring, consolidates box both sides connection degree through the strengthening rib, alleviates box both sides face vibration amplitude, absorbs the box internal noise through the acoustic celotex board, cushions box and bottom plate junction through damping spring, and then realizes that box vibration noise is little, has reduced the noise of centrifugal fan during operation, makes centrifugal fan accord with noise environmental protection requirement more.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

In the drawings:

FIG. 1 is a schematic view of a front cross-sectional structure of a novel low-noise centrifugal fan according to the present invention;

FIG. 2 is a schematic view of a front view subjective structure of a novel low-noise centrifugal fan according to the present invention;

fig. 3 is a schematic side view of a cross-sectional structure of a novel centrifugal fan with low noise according to the present invention.

The reference numerals are explained below:

1. a box body; 2. a sound insulating board; 3. a fan housing; 4. an air outlet; 5. an air inlet; 6. a fan blade; 7. a rubber shock-absorbing strip; 8. reinforcing ribs; 9. a base plate; 10. a telescopic rod; 11. a damping spring; 12. a motor installation box; 13. a motor; 14. a rubber shock-absorbing ring; 15. a universal wheel.

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 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the present invention provides a new technical solution: a novel low-noise centrifugal fan comprises a box body 1, wherein the side surface of the box body 1 is arranged in a square shape, the material of the box body 1 is iron so as to ensure the firmness of the box body, sound insulation boards 2 are fixedly connected to the inner wall of the box body 1, the thickness of each sound insulation board 2 is twice the thickness of the box body 1, noise in the box body 1 is absorbed through the sound insulation boards 2, reinforcing ribs 8 are fixedly connected between the inner walls of the box body 1, the number of the reinforcing ribs 8 is four, the four reinforcing ribs 8 are respectively arranged at four corners of the inner wall of the box body 1, the connection degree of two sides of the box body 1 is reinforced through the reinforcing ribs 8, the vibration amplitude of two side surfaces of the box body 1 is reduced, a fan shell 3 is fixedly arranged in the middle of the box body 1, an air outlet 4 is arranged on one side of the fan shell 3, the air outlet 4 of the fan is communicated with the box body 1, and an air inlet 5 is arranged in the middle of the fan shell 3 and communicated with the box body 1, the fan casing 3 is internally and rotatably provided with fan blades 6, two sides of the fan casing 3 are fixedly connected with rubber damping strips 7 along contour lines, the rubber damping strips 7 are in contact connection with the inner wall of the box body 1, the rubber damping strips 7 at two sides are in contact with the box body 1 to provide a buffering effect for the fan casing 3, the vibration amplitude of the fan casing 3 during the work of a fan is reduced, further the vibration noise of the fan casing 3 is reduced, four corners at the bottom of the box body 1 are fixedly connected with telescopic rods 10, the bottom of the telescopic rods 10 is fixedly connected with a bottom plate 9, the length and the width of the bottom plate 9 are both greater than those of the box body 1 so as to ensure the placement stability of the box body 1, damping springs 11 are movably arranged outside the telescopic rods 10, the joints of the box body 1 and the bottom plate 9 are buffered through the damping springs 11 so as to reduce the vibration noise of the box body, the rear side of the box body 1 is provided with a motor installation box 12, motor 13 is installed to motor install bin 12 fit in, and motor 13 output runs through box 1 and is connected with flabellum 6 rotation, the cooperation of motor 13 outside equidistance is provided with rubber shock ring 14, and rubber shock ring 14 and motor install bin 12 inner wall contact are connected, rubber shock ring 14 is three altogether, and three rubber shock ring 14 sets up front end, middle part and the rear end at motor 13 respectively, through set up rubber shock ring 14 before motor 13, in, between rear end and the motor install bin 12, reduces motor 13 during operation and produces the vibration effect to motor install bin 12 to reduce motor 13 noise, bottom plate 9 bottom surface four corners rotates and is connected with universal wheel 15, makes things convenient for centrifugal fan's removal through universal wheel 15.

The working principle and the using process of the utility model are as follows: when the vibration damping device is used, the centrifugal fan is pushed to reach a designated working place through the universal wheel 15, the centrifugal fan is started, the motor 13 drives the fan blades 6 to rotate, air enters from the air inlet 5, is blown out from the air outlet 4 after being pressurized, noise inside the box body 1 is absorbed through the sound insulation board 2, the connection degree of the two sides of the box body 1 is reinforced through the reinforcing ribs 8, the vibration amplitude of the two sides of the box body 1 is reduced, the rubber damping strips 7 on the two sides are contacted with the box body 1 to provide a buffering effect for the fan shell 3, the vibration amplitude of the fan shell 3 when the fan works is reduced, the noise of the fan shell 3 is reduced, the connection part of the box body 1 and the bottom plate 9 is buffered through the damping spring 11, further, the vibration noise of the box body is reduced, the rubber damping rings 14 are arranged between the front, middle and rear ends of the motor 13 and the motor installation box 12, and the vibration effect on the motor installation box 12 when the motor 13 works is reduced, thereby reduce motor 13 noise, finally realize that this novel centrifugal fan noise is low.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a novel centrifugal fan of low noise, includes box (1), its characterized in that: the inner wall of the box body (1) is fixedly connected with a sound insulation board (2), reinforcing ribs (8) are fixedly connected between the inner walls of the box body (1), a fan shell (3) is fixedly arranged in the middle of the box body (1), an air outlet (4) is arranged on one side of the fan shell (3), the air outlet (4) of the fan is communicated with the outside of the box body (1), an air inlet (5) is communicated with the middle of the fan shell (3) and the box body (1), fan blades (6) are rotatably arranged in the fan shell (3), rubber damping strips (7) are fixedly connected to two sides of the fan shell (3) along contour lines, the rubber damping strips (7) are in contact connection with the inner wall of the box body (1), telescopic rods (10) are fixedly connected to four corners of the bottom of the box body (1), a bottom plate (9) is fixedly connected to the bottom of the telescopic rods (10), and damping springs (11) are movably arranged on the outer side of the telescopic rods (10), the utility model discloses a damping device for fan blades, including box (1), motor install bin (12), motor (13) are installed to motor install bin (12) fit in, and motor (13) output runs through box (1) and rotates with flabellum (6) to be connected, the equidistance cooperation in motor (13) outside is provided with rubber shock attenuation ring (14), and rubber shock attenuation ring (14) and motor install bin (12) inner wall contact are connected.

2. The novel centrifugal fan with low noise as claimed in claim 1, wherein: four corners of the bottom surface of the bottom plate (9) are rotatably connected with universal wheels (15).

3. The novel centrifugal fan with low noise as claimed in claim 2, wherein: the side surface of the box body (1) is arranged in a square shape, and the box body (1) is made of iron.

4. The novel low-noise centrifugal fan as claimed in claim 3, wherein: the thickness of the sound insulation board (2) is twice that of the box body (1).

5. The novel centrifugal fan with low noise as claimed in claim 4, wherein: the length and the width of the bottom plate (9) are both larger than those of the box body (1).

6. The novel low-noise centrifugal fan according to claim 5, wherein: the number of the reinforcing ribs (8) is four, and the four reinforcing ribs (8) are respectively arranged at four corners of the inner wall of the box body (1).

7. The novel centrifugal fan with low noise as claimed in claim 6, wherein: the number of the rubber damping rings (14) is three, and the three rubber damping rings (14) are respectively arranged at the front end, the middle part and the rear end of the motor (13).