CN211059033U

CN211059033U - Low-noise centrifugal fan

Info

Publication number: CN211059033U
Application number: CN201922099656.4U
Authority: CN
Inventors: 王元
Original assignee: Jiangsu Juyi Electromechanical Co ltd
Current assignee: Jiangsu Juyi Electromechanical Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-07-21
Anticipated expiration: 2029-11-28

Abstract

The utility model relates to a press the centrifugal fan field, specifically disclose a low noise centrifugal fan, including casing, motor, support and motor base, be equipped with the air intake on the casing, be equipped with the impeller in the casing, the motor is installed on motor base, the impeller passes through the drive shaft with the motor and is connected, the casing is installed on the support; the casing is divided into a front side plate, a rear side plate and a volute plate, and the front side plate, the rear side plate and the volute plate are all of a double-layer vacuum structure. The utility model discloses a casing of high vacuum has blocked the inside noise that produces of most fans, and it is effectual to have sound insulation, practices thrift the advantage in space.

Description

Low-noise centrifugal fan

Technical Field

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

Background

The centrifugal fan is a general mechanical device with a large quantity and a wide range, and is used in almost all industries. In the use process of the centrifugal fan, the existence of noise can have great influence on production, environment and the like. The main sources of the noise of the centrifugal fan are mechanical noise, motor noise, pneumatic noise and the like. At present, a plurality of methods capable of effectively reducing the noise of the fan are adopted, the noise is reduced by adopting a method of adding a silencer at an air inlet and an air outlet or adding a sound-proof cover, and the silencer and the sound-proof cover occupy larger space and are not beneficial to the utilization of workshop space.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be: the centrifugal fan saves space and has low noise aiming at the problem that the space required by installing a silencer and a sound-proof shield of the centrifugal fan is large in the prior art.

The utility model is realized by the following technical scheme, a low-noise centrifugal fan comprises a casing, a motor, a support and a motor base, wherein the casing is provided with an air inlet, the casing is internally provided with an impeller, the motor is arranged on the motor base, the impeller is connected with the motor through a driving shaft, and the casing is arranged on the support; the casing is divided into a front side plate, a rear side plate and a volute plate, and the front side plate, the rear side plate and the volute plate are all of a double-layer vacuum structure.

Further, double-deck vacuum structure is including the interior housing plate, the shell plate that have protruding flange, interior housing plate, shell plate pass through flange joint, and the centre has the rubber gasket, scribble sealed glue between rubber gasket and interior housing plate, the shell plate, shell plate and interior housing plate form the even vacuum space of a thickness.

Furthermore, in order to prevent the double-layer vacuum structure from deforming seriously under the action of internal and external pressure difference, a plurality of supporting pieces are uniformly distributed on the outer shell plate, the supporting pieces are made of rubber materials, the length of each supporting piece is consistent with the protruding height of the inner shell plate, one end of each supporting piece is fixedly connected with the outer shell plate, and the other end of each supporting piece is abutted against the inner shell plate.

Further, in order to strengthen the sound insulation effect, the outer shell plate is fixedly connected with a micro-perforated plate in the middle of the supporting piece, the micro-perforated plate is made of stainless steel, the thickness of the micro-perforated plate is 1mm, and the perforation rate is 1% -3%.

Further, in order to maintain the vacuum degree of the double-layer vacuum structure, an air exhaust hole is formed in the shell plate and connected with a vacuum pump, and a pressure gauge is further arranged on the shell plate.

The utility model has the advantages that:

the utility model discloses preceding curb plate, posterior lateral plate and the spiral case board that constitute fan casing are double-deck vacuum structure, and inside vacuum cavity that is close can reduce most noises, still is equipped with on the shell plate for the perforated plate, cuts apart into 2 cavitys with the vacuum cavity, utilizes resonance absorption sound wave energy. The utility model discloses on sound structure locates the casing because of making an uproar falls, need not additionally to increase silencing devices such as sound-proof housing, practiced thrift the space.

Drawings

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

fig. 2 is a left side view of a low noise centrifugal fan according to the present invention;

fig. 3 is a partial enlarged view of the double-layer vacuum structure at I in fig. 1.

In the figure; 1, a machine shell; 11, an air inlet; 12 an impeller; 13 driving the shaft; 14 a front side panel; 15 a rear side plate; 16 volute plate; 2, a motor; 3, a support; 4, a motor base; 5, a double-layer vacuum structure; 51 an inner skin; 52 an outer shell plate; 53 rubber gaskets; 54 a support member; 55 a micro-perforated plate; 56 air extraction holes; 57 pressure gauge.

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.

As shown in fig. 1-3, a low-noise centrifugal fan includes a casing 1, a motor 2, a support 3 and a motor base 4, wherein the casing 1 is provided with an air inlet 11, an impeller 12 is arranged in the casing 1, the motor 2 is mounted on the motor base 4, the impeller 12 is connected with the motor 2 through a driving shaft 13, and the casing 1 is mounted on the support 3; the casing 1 is divided into a front side plate 14, a rear side plate 15 and a volute plate 16, wherein the front side plate 14, the rear side plate 15 and the volute plate 16 are all double-layer vacuum structures 5.

In practical application, the double-layer vacuum structure 5 comprises an inner shell plate 51 and an outer shell plate 52 which are provided with raised flanges, the inner shell plate 51 and the outer shell plate 52 are connected through flanges, a rubber gasket 53 is clamped between the inner shell plate 51 and the outer shell plate 52, sealant is coated between the rubber gasket 53 and the inner shell plate 51 and between the rubber gasket 53 and the outer shell plate 52, and the outer shell plate 52 and the inner shell plate 51 form a vacuum space with uniform thickness.

In practical application, in order to prevent the double-layer vacuum structure 5 from deforming seriously under the action of internal and external pressure differences, a plurality of supporting pieces 54 are uniformly distributed on the outer shell plate 52, the supporting pieces 54 are made of rubber materials, the length of each supporting piece 54 is consistent with the protruding height of the inner shell plate 51, one end of each supporting piece 54 is fixedly connected with the outer shell plate 52, and the other end of each supporting piece 54 abuts against the inner shell plate 51.

In practical application, in order to enhance the sound insulation effect, the outer shell plate 52 is further fixedly connected with a micro-perforated plate 55 in the middle of the support 54, the micro-perforated plate 55 is made of stainless steel, the thickness of the micro-perforated plate is 1mm, and the perforation rate is 1% -3%.

In practical application, in order to maintain the vacuum degree of the double-layer vacuum structure 5, the outer shell plate 52 is provided with an air suction hole 56, the air suction hole 56 is connected with a vacuum pump, and the outer shell plate 52 is further provided with a pressure gauge 57.

The utility model discloses a theory of operation:

the utility model discloses set up noise insulation on casing 1, constitute fan casing 1's preceding curb plate 14, posterior lateral plate 15 and spiral case board 16 and be double-deck vacuum structure, inside vacuum cavity can reduce most noises to still be equipped with microperforated panel 55 on the shell plate, cut apart into 2 cavitys with the vacuum cavity, utilize resonance absorption sound wave energy. The utility model discloses aspirating hole 56 and manometer 57 have still been set up, monitored the double-deck vacuum structure in the actual pressure condition through manometer 57, if the vacuum is not enough, then can open the vacuum pump and take out the low pressure state to the limit with the cavity internal gas pressure, keep the high vacuum constantly, have guaranteed syllable-dividing effect.

To sum up, the utility model has the advantages of compact structure, saving space, the noise control is effectual.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the present invention is to provide a person skilled in the art with the ability to understand the contents of the present invention and implement the same, and not to limit the scope of the present invention.

Claims

1. The utility model provides a low noise centrifugal fan which characterized in that: the air conditioner comprises a machine shell (1), a motor (2), a support (3) and a motor base (4), wherein an air inlet (11) is formed in the machine shell (1), an impeller (12) is arranged in the machine shell (1), the motor (2) is installed on the motor base (4), the impeller (12) is connected with the motor (2) through a driving shaft (13), and the machine shell (1) is installed on the support (3); the casing (1) is divided into a front side plate (14), a rear side plate (15) and a volute plate (16), wherein the front side plate (14), the rear side plate (15) and the volute plate (16) are all double-layer vacuum structures (5).

2. The low noise centrifugal fan of claim 1, wherein: double-deck vacuum structure (5) are including interior coverboard (51), shell plate (52) that have protruding flange, interior coverboard (51), shell plate (52) pass through flange joint, and centre clamp has rubber gasket (53), scribble sealed glue between rubber gasket (53) and interior coverboard (51), shell plate (52) and interior coverboard (51) form the even vacuum space of a thickness.

3. A low noise centrifugal fan according to claim 2, wherein: a plurality of supporting pieces (54) are uniformly distributed on the outer shell plate (52), the supporting pieces (54) are made of rubber materials, the length of each supporting piece (54) is consistent with the protruding height of the inner shell plate (51), one end of each supporting piece (54) is fixedly connected with the outer shell plate (52), and the other end of each supporting piece (54) is abutted to the inner shell plate (51).

4. A low noise centrifugal fan according to claim 3, wherein: the shell plate (52) is fixedly connected with a micro-perforated plate (55) in the middle of the supporting piece (54), the micro-perforated plate (55) is made of stainless steel, the thickness of the micro-perforated plate is 1mm, and the perforation rate is 1% -3%.

5. A low noise centrifugal fan according to claim 2, wherein: the vacuum pump is characterized in that an air suction hole (56) is formed in the outer shell plate (52), the air suction hole (56) is connected with a vacuum pump, and a pressure gauge (57) is further arranged on the outer shell plate (52).