CN209800305U

CN209800305U - Low-noise centrifugal ventilator

Info

Publication number: CN209800305U
Application number: CN201822198210.2U
Authority: CN
Inventors: 施德泉
Original assignee: Nantong Xiehe Fan Technology Co Ltd
Current assignee: Nantong Xiehe Fan Technology Co Ltd
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2019-12-17
Anticipated expiration: 2028-12-25

Abstract

The utility model discloses a low noise centrifugal fan, it includes the wind shell, the impeller, including a motor, an end cap, a controller, and a cover plate, the rotor assembly, monolith support and main shaft, monolith support installs the wind shell in one side, monolith support top is fixed with the mounting bracket, the mounting bracket top is provided with the main shaft, the rotor assembly is installed to the both sides of main shaft, a side of wind shell is provided with the air intake, the top of wind shell is provided with the air outlet, the air outlet department of wind shell installs the muffler, the muffler is arranged by the hush pipe of many parallels and is constituteed, be provided with the impeller in the wind shell of air intake side, impeller rear side center is connected with the fixed cover, the fixed cover is installed. The utility model discloses in, install the muffler in air outlet department, the metal mesh is installed in the import department of impeller to the noise abatement, and air velocity and pressure gradient can become even rapidly, can further the noise reduction.

Description

Low-noise centrifugal ventilator

Technical Field

The utility model relates to a fan, concretely relates to low noise centrifugal fan.

Background

Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. Centrifugal fans are widely used in ventilation, dust extraction and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings. The general centrifugal fan is composed of a casing, a main shaft, an impeller, a bearing transmission mechanism, a motor and the like, and has the advantages of large volume, high noise during working, easy formation of noise pollution, serious damage to physical and mental health of workers and reduction of working efficiency.

SUMMERY OF THE UTILITY MODEL

For solving the problem in the above-mentioned background art, the utility model provides a low noise centrifugal fan.

The utility model provides a following technical scheme:

Low noise centrifugal fan, it includes wind shell, impeller, motor, rotor assembly, monolith support and main shaft, the wind shell is installed to monolith support one side, the monolith support top is fixed with the mounting bracket, the mounting bracket top is provided with the main shaft, the rotor assembly is installed to the both sides of main shaft, a side of wind shell is provided with the air intake, the top of wind shell is provided with the air outlet, the air outlet department of wind shell installs the muffler, the muffler is arranged by the hush pipe of many parallels and is constituteed, be provided with the impeller in the wind shell of air intake side, install the metal mesh in the import department of impeller, impeller rear side center is connected with fixed cover, fixed cover is installed in main shaft one end, the main shaft other end passes through the drive mechanism linkage with the motor.

Furthermore, drive mechanism is including installing belt pulley, the belt and the motor between two belt pulleys on the main shaft other end and motor shaft, the motor passes through belt transmission and drives the main shaft rotation.

Further, a belt cover is installed outside the belt.

The shape of air intake is tubaeform.

Furthermore, a water drain pipe is arranged at the bottom of the wind shell.

Further, porous sound absorption materials are filled between the sound absorption pipes.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses in, install the muffler in air outlet department, the metal mesh is installed in the import department of impeller to the noise abatement, and air velocity and pressure gradient can become even rapidly, can further the noise reduction.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a schematic structural diagram of the muffler of the present invention.

In the figure: 1. a wind shell; 2. an impeller; 3. an air inlet; 4. a motor; 5. a rotor set; 6. an integral support; 7. a belt cover; 8. a main shaft; 9. a mounting frame; 10. an air outlet; 11. a fixed cover; 12. a belt pulley; 13. a belt; 14. a water discharge pipe 15, a silencer 16, a silencing pipe 17 and a metal net.

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. 1-3, the low noise centrifugal fan of the present invention comprises a wind shell 1, an impeller 2, a motor 4, a rotor assembly 5, a whole support 6 and a main shaft 8, wherein the wind shell 1 is installed on one side of the whole support 6, a mounting frame 9 is fixed on the top of the whole support 6, the main shaft 8 is arranged above the mounting frame 9, the rotor assembly 5 is installed on both sides of the main shaft 8, an air inlet 3 is arranged on one side surface of the wind shell 1, an air outlet 10 is arranged on the top of the wind shell 1, a silencer 15 is installed at the air outlet 10 of the wind shell 1, the silencer 15 is composed of a plurality of parallel silencing tubes 16, the silencer 15 is formed by arranging a plurality of silencing tubes 16, the noise reduction effect is good, the impeller 2 is installed in the wind shell 1 on the side of the air inlet 3, a metal mesh 17 is installed at the inlet of the impeller 2, the metal mesh 17 is arranged to immediately convert the laminar flow boundary layer on the, the separation of the boundary layer on the back of the blade is delayed, even the separation is not carried out, the rear edge of the blade is connected with a net, the air flow speed and the pressure gradient behind the net can be rapidly and uniformly changed, the center of the rear side of the impeller 2 is connected with a fixed cover 11, the fixed cover 11 is arranged at one end of a main shaft 8, and the other end of the main shaft 8 is linked with the motor 4 through a transmission mechanism.

The transmission mechanism comprises a belt pulley 12 arranged at the other end of the main shaft 8 and on the shaft of the motor 4, a belt 13 between the two belt pulleys 12 and the motor 4, and the motor 4 drives the main shaft 8 to rotate through the transmission of the belt 13.

A belt cover 7 is arranged outside the belt 13. Has the functions of safety and dust prevention.

The air inlet 3 is in the shape of a horn. Therefore, the air inlet amount is large and the power is strong.

The bottom of the wind shell 1 is provided with a water discharge pipe 14. The water is convenient to flow out, and the interior of the wind shell 1 is kept dry.

Porous sound-absorbing material is filled between the muffling pipes 16. The sound absorption material comprises mineral wool, glass wool, felt and wood wool sound absorption board.

Centrifugal fan is from the air intake, and wind shell 1 mainly is used for introducing gas and exhaust gas, becomes pressure energy with the partial kinetic energy of gas simultaneously, through the direction of volute casing form casing, makes it flow to the ventilation blower export, at this in-process, can produce bigger noise, the utility model discloses in, locate to install muffler 15 at air outlet 10, the noise abatement installs metal mesh 17 in impeller 2's import department, and air velocity can become evenly rapidly with pressure gradient, can further the noise reduction.

Claims

1. Low noise centrifugal fan, its characterized in that: it includes wind shell, impeller, motor, rotor assembly, monolith and main shaft, the wind shell is installed to monolith one side, the monolith top is fixed with the mounting bracket, the mounting bracket top is provided with the main shaft, the rotor assembly is installed to the both sides of main shaft, a side of wind shell is provided with the air intake, the top of wind shell is provided with the air outlet, the muffler is installed to wind shell air outlet department, the muffler is arranged by the hush pipe of many parallels and is constituteed, be provided with the impeller in the wind shell of air intake side, install the metal mesh in the import department of impeller, impeller rear side center is connected with the fixed cowling, the fixed cowling is installed in main shaft one end, the main shaft other end passes through the drive mechanism linkage with the motor.

2. A low noise centrifugal ventilator according to claim 1, wherein: the transmission mechanism comprises a belt pulley arranged at the other end of the main shaft and on the shaft of the motor, a belt between the two belt pulleys and a motor, and the motor drives the main shaft to rotate through belt transmission.

3. A low noise centrifugal ventilator according to claim 2, wherein: a belt cover is arranged outside the belt.

4. A low noise centrifugal ventilator according to claim 1, wherein: the shape of air intake is tubaeform.

5. A low noise centrifugal ventilator according to claim 1, wherein: and a water drain pipe is arranged at the bottom of the wind shell.

6. A low noise centrifugal ventilator according to claim 1, wherein: porous sound-absorbing materials are filled between the sound-absorbing pipes.