CN213016897U

CN213016897U - Low-noise centrifugal fan

Info

Publication number: CN213016897U
Application number: CN202021812274.8U
Authority: CN
Inventors: 蒋海锋; 段志军; 朱兰岚; 蔡少峰
Original assignee: Fengfengjia Fan Shanghai Co ltd
Current assignee: Fengfengjia Fan Shanghai Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-04-20
Anticipated expiration: 2030-08-26

Abstract

The utility model discloses a low noise centrifugal fan, including public chassis, first support, air inlet box and second support are installed to the top on public chassis, the motor is installed at the top of second support, two bearing frames, two are installed at the top of first support all be fixed with the bearing in the bearing frame. The utility model discloses well soundproof cotton can prevent effectively that the noise in the air inlet box from passing to the outside, the damping acoustical panel carries out noise abatement to the noise, the noise has effectively been reduced, noise pollution has been reduced, heat dissipation impeller can effectively cool down because of the high temperature that high-speed rotation produced to the impeller in the air inlet box, prevent that it from damaging inside components and parts because of the high temperature, the vibrations that produce when setting up the reducible motor operation of rubber pad between second support and motor, the production of noise has been reduced, the protective housing can prevent that its device is inside to fall ash and personnel's mistake from touching, the security thereof has been improved.

Description

Low-noise centrifugal fan

Technical Field

The utility model relates to a centrifugal fan technical field especially relates to low noise centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of the 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.

When the centrifugal fan is used, noise is easily generated due to high-speed rotation of the impeller, noise pollution is caused, temperature is easily increased during high-speed rotation, and internal parts of the centrifugal fan are easily damaged due to overhigh temperature.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art impeller high-speed rotatory its very easy noise that produces, cause noise pollution, and extremely easily heat up in high-speed the rotation, the shortcoming of its inside part is very easily damaged to the high temperature, and the low noise centrifugal fan who proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

low noise centrifugal fan, including public chassis, first support, air inlet box and second support are installed at the top on public chassis, the motor is installed at the top of second support, two bearing frames are installed at the top of first support, two all be fixed with the bearing in the bearing frame, the main shaft is installed to the bearing internal rotation, the one end of main shaft passes through the coupling joint with the output shaft of motor, the other end of main shaft runs through the air inlet box and is connected with the impeller, the air inlet has been seted up to the side of air inlet box, the air inlet is loudspeaker form, the end fixing of air inlet has the damping acoustical panel, the through-hole has been seted up on the damping acoustical panel, the top intercommunication of air inlet box has the casing, fixed cover has connect the heat dissipation impeller on the main shaft, the heat dissipation impeller is located the side of air.

Preferably, the side surface of the casing is communicated with a plastic corrugated pipe, and a fiber layer is filled in the plastic corrugated pipe.

Preferably, the side surface of the plastic corrugated pipe is provided with an air outlet, and the air outlet is in a bell mouth shape.

Preferably, a first foam board and a second foam board are fixed inside the casing, the first foam board and the second foam board are both designed in an inclined mode, and the end portions of the first foam board and the second foam board are both arc-shaped.

Preferably, soundproof cotton is arranged inside the air inlet box, and the public chassis is provided with mounting holes.

Preferably, a protective shell is fixed to the top of the public chassis, the motor is located in the protective shell, an opening is formed in the side face of the protective shell, a filter screen is installed in the opening, and a rubber pad is arranged between the second support and the motor.

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

1: the utility model discloses in can effectively prevent through set up soundproof cotton in the air box that the noise in the air box from passing to the outside, the air inlet sets to loudspeaker form can make the air enter into the air box fast in, has reduced the noise that air and air inlet friction produced, and the damping acoustical panel carries out amortization to the noise and handles, has effectively reduced the noise, has reduced noise pollution.

2: the utility model discloses in can effectively cool down because of the high temperature that high-speed rotation produced to the impeller in the air inlet box through fixed cup joint heat dissipation impeller on the main shaft, prevent that it from damaging inside components and parts because of the high temperature, set up the vibrations that the reducible motor of rubber pad produced when moving between second support and motor, reduced the production of noise, the protective housing can prevent that its device is inside to fall ash and personnel mistake from touching, has improved its security.

Drawings

Fig. 1 is a front view of a low noise centrifugal fan according to the present invention;

fig. 2 is a front sectional view of the low noise centrifugal fan of the present invention;

fig. 3 is a partially enlarged view of a portion a in fig. 2.

In the figure: the damping noise reduction device comprises a common chassis 1, a mounting hole 2, a first support 3, a second support 4, an air inlet box 5, soundproof cotton 6, an impeller 7, an air inlet 8, a through hole 9, a damping noise reduction plate 10, a machine shell 11, a first foam plate 12, a second foam plate 13, a plastic corrugated pipe 14, an air outlet 15, a motor 16, a protective shell 17, a filter screen 18, a main shaft 19, a rubber pad 20, a coupler 21, a heat dissipation impeller 22, a bearing 23 and a bearing seat 24.

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.

Referring to fig. 1-3, the low noise centrifugal fan comprises a common chassis 1, and is characterized in that a first bracket 3 is installed at the top of the common chassis 1, air inlet box 5 and second support 4, motor 16 is installed at the top of second support 4, two bearing frames 24 are installed at the top of first support 3, all be fixed with bearing 23 in two bearing frames 24, main shaft 19 is installed to bearing 23 internal rotation, the one end of main shaft 19 passes through shaft coupling 21 with motor 16's output shaft and is connected, the other end of main shaft 19 runs through air inlet box 5 and is connected with impeller 7, air inlet 8 has been seted up to air inlet box 5's side, air inlet 8 is loudspeaker form, the end fixing of air inlet 8 has damping acoustical panel 10, through-hole 9 has been seted up on the damping acoustical panel 10, air inlet box 5's top intercommunication has casing 11, fixed cover has connect heat dissipation impeller 22 on the main shaft 19, heat dissipation impeller 22 is located air inlet box 5's.

The side of the casing 11 is communicated with a plastic corrugated pipe 14, the inside of the plastic corrugated pipe 14 is filled with a fiber layer, the side of the plastic corrugated pipe 14 is provided with an air outlet 15, and the air outlet 15 is in a bell mouth shape.

Casing 11's inside is fixed with first cystosepiment 12 and second cystosepiment 13, first cystosepiment 12 and the design of second cystosepiment 13 all slope, the tip of first cystosepiment 12 and second cystosepiment 13 all is circular-arc, the inside of inlet box 5 is provided with soundproof cotton 6, mounting hole 2 has been seted up on public chassis 1, public chassis 1's top is fixed with protective housing 17, motor 16 is located protective housing 17, the opening has been seted up to the side of protective housing 17, install filter screen 18 in the opening, be provided with rubber pad 20 between second support 4 and the motor 16.

The working principle is as follows: when the silencer is used, the output shaft of the motor 16 drives the main shaft 19 to rotate through the coupler 21, the main shaft 19 drives the impeller 7 and the heat dissipation impeller 22 to rotate, so that air enters the air inlet box 5 through the air inlet 8, the air inlet 8 is arranged in a horn shape, so that the air can rapidly enter the air inlet box 5, noise generated by friction of the air and the air inlet 8 is reduced, the damping silencing plate 10 is used for silencing the noise, the noise is effectively reduced, noise pollution is reduced, the soundproof cotton 6 arranged in the air inlet box 5 can effectively prevent the noise in the air inlet box 5 from being transmitted to the outside, wind and noise generated by rotation of the impeller 7 are secondarily silenced through the first foam plate 12 and the ground foam plate 13 arranged in the shell 11 and then are discharged through the plastic corrugated pipe 14 after silencing treatment, the air outlet 15 is arranged in a horn shape, so that the noise generated by friction force between the wind and the air inlet and the air outlet 15 when the wind, the heat dissipation impeller 22 is fixedly sleeved on the main shaft 19, so that high temperature generated by high-speed rotation of the impeller 7 in the air inlet box 5 can be effectively cooled, internal components are prevented from being damaged due to overhigh temperature, the rubber pad 20 is arranged between the second support 4 and the motor 16, vibration generated during operation of the motor 16 can be reduced, noise is reduced, dust falling in the device and mistaken touch of personnel can be prevented by the protective shell 17, and safety of the device is improved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. Low-noise centrifugal fan, including public chassis (1), its characterized in that, first support (3), inlet box (5) and second support (4) are installed to the top of public chassis (1), motor (16) are installed to the top of second support (4), two bearing frames (24) are installed to the top of first support (3), two all be fixed with bearing (23) in bearing frame (24), main shaft (19) are installed to bearing (23) internal rotation, the one end of main shaft (19) is connected through shaft coupling (21) with the output shaft of motor (16), the other end of main shaft (19) runs through inlet box (5) and is connected with impeller (7), air inlet (8) have been seted up to the side of inlet box (5), air inlet (8) are loudspeaker form, the tip of air inlet (8) is fixed with damping acoustical panel (10), the damping and silencing plate (10) is provided with a through hole (9), the top of the air inlet box (5) is communicated with a machine shell (11), a main shaft (19) is fixedly sleeved with a heat dissipation impeller (22), and the heat dissipation impeller (22) is located on the side face of the air inlet box (5).

2. The low-noise centrifugal fan according to claim 1, wherein the side of the casing (11) is communicated with a plastic corrugated pipe (14), and the interior of the plastic corrugated pipe (14) is filled with a fiber layer.

3. The low-noise centrifugal fan according to claim 2, wherein the side surface of the plastic corrugated pipe (14) is provided with an air outlet (15), and the air outlet (15) is in a bell mouth shape.

4. The low noise centrifugal fan according to claim 1, wherein a first foam board (12) and a second foam board (13) are fixed inside the casing (11), the first foam board (12) and the second foam board (13) are both designed in an inclined manner, and the ends of the first foam board (12) and the second foam board (13) are both in a circular arc shape.

5. The low-noise centrifugal fan according to claim 1, wherein sound insulation cotton (6) is arranged inside the air inlet box (5), and the common chassis (1) is provided with mounting holes (2).

6. The low-noise centrifugal fan according to claim 1, wherein a protective shell (17) is fixed to the top of the common chassis (1), the motor (16) is located in the protective shell (17), an opening is formed in the side surface of the protective shell (17), a filter screen (18) is installed in the opening, and a rubber pad (20) is arranged between the second support (4) and the motor (16).