CN213478772U

CN213478772U - High-speed fan silencing device

Info

Publication number: CN213478772U
Application number: CN202021788606.3U
Authority: CN
Inventors: 谭国荣
Original assignee: Dongguan Youlian Sheet Metal Technology Co ltd
Current assignee: Dongguan Youlian Sheet Metal Technology Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-06-18
Anticipated expiration: 2030-08-24

Abstract

The utility model relates to the field of fan silencing, in particular to a high-speed fan silencing device which is used on a fan and comprises a device body connected with the fan, wherein the device body comprises an outer shell, a first silencing plate, a second silencing plate, a third silencing plate and a fourth silencing plate which are arranged inside the outer shell, and mounting plates which are respectively arranged on two sides of the inner wall of the outer shell; the second acoustical panel install in the mounting panel, first acoustical panel is close to one side of second acoustical panel is provided with the expansion board. This high-speed fan silencing device is applied to the fan, through setting up a plurality of acoustical panels, and the structure of every acoustical panel is different, can effectively eliminate the noise of low frequency and well high frequency, and it is good to fall the noise performance, and the amortization scope is big and the noise cancelling effect is good, effectively reduces the noise that the fan produced, improves workman's operational environment.

Description

High-speed fan silencing device

Technical Field

The utility model relates to a fan amortization field especially relates to a high-speed fan silencing device.

Background

The high-speed centrifugal fan mostly adopts the technology of a magnetic suspension or air suspension bearing and a high-speed permanent magnet synchronous motor, so that the energy-saving effect is obvious, and the high-speed centrifugal fan is widely applied to the industries of medicine, environmental protection, chemical industry, petroleum and the like. The cabinet structure of the fan is divided into a main cabinet and an electric control cabinet, the running rotating speed of a main machine in the main cabinet is about 15000 r/min-40000 r/min, the noise of the fan is mainly medium-high frequency, and if the noise reduction and silencing control is not carried out on the fan, the trouble can be caused to the work of field operation personnel and the life of nearby residents, and the physical and mental health of people can be influenced in serious cases.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a high-speed fan silencing device that noise reduction effect is good.

The utility model adopts the following technical scheme:

a high-speed fan silencing device is used for a fan and comprises a device body connected with the fan, wherein the device body comprises an outer shell, a first silencing plate, a second silencing plate, a third silencing plate and a fourth silencing plate which are arranged inside the outer shell, and mounting plates which are respectively arranged on two sides of the inner wall of the outer shell; the second acoustical panel install in the mounting panel, first acoustical panel is close to one side of second acoustical panel is provided with the expansion board.

The technical scheme is further improved in that the first sound-absorbing plate, the second sound-absorbing plate, the third sound-absorbing plate and the fourth sound-absorbing plate are sequentially arranged inside the outer shell from left to right.

The further improvement on the technical scheme is that the mounting plate deviates from one side of the inner wall of the outer shell, a mounting groove is formed in the mounting plate, and one side of the second silencing plate is fixed in the mounting groove.

The technical scheme is further improved in that the first silencing plate is provided with a plurality of first silencing holes, and the expansion plate is provided with a plurality of expansion blades at intervals.

In a further improvement of the above technical solution, the expansion leaves extend in a direction away from the center of the expansion plate.

The technical proposal is further improved in that the number of the expansion leaves is three, and the included angle between two adjacent expansion leaves is 120 degrees.

The technical scheme is further improved in that the second sound absorption plate comprises a first sound absorption cotton layer, a second sound absorption cotton layer and a grid plate, and the first sound absorption cotton layer and the second sound absorption cotton layer are respectively arranged on two sides of the grid plate.

The third sound-absorbing plate is further improved in that an accommodating cavity is formed in the third sound-absorbing plate.

The technical scheme is further improved in that the fourth sound absorption plate is provided with a plurality of second sound absorption holes which are unevenly distributed at intervals.

The technical scheme is further improved in that the plurality of second silencing holes are obliquely arranged along the axis direction of the fourth silencing plate, and the plurality of second silencing holes are not parallel to each other.

The utility model has the advantages that:

this high-speed fan silencing device is applied to the fan, through setting up a plurality of acoustical panels, and the structure of every acoustical panel is different, can effectively eliminate the noise of low frequency and well high frequency, and it is good to fall the noise performance, and the amortization scope is big and the noise cancelling effect is good, effectively reduces the noise that the fan produced, improves workman's operational environment.

Drawings

Fig. 1 is a schematic structural view of a high-speed fan silencer according to the present invention applied to a fan;

fig. 2 is a schematic structural view of the high-speed fan silencer of the present invention;

fig. 3 is a schematic structural view of a first sound-deadening sheet of the high-speed fan sound-deadening device of fig. 2.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention.

As shown in fig. 1 to 3, a high-speed fan silencer used on a fan 10 comprises a device body 20 connected with the fan 10, wherein the device body 20 comprises an outer shell 30, a first silencing plate 40, a second silencing plate 50, a third silencing plate 60 and a fourth silencing plate 70 which are arranged inside the outer shell 30, and mounting plates 80 which are respectively arranged on two sides of the inner wall of the outer shell 30; the second sound-deadening plate 50 is attached to the mounting plate 80, and an expansion plate 90 is provided on the first sound-deadening plate 40 on the side closer to the second sound-deadening plate 50.

As shown in fig. 2, the first, second, third and fourth sound-

deadening plates

40, 50, 60 and 70 are disposed inside the outer case 30 in this order from left to right.

As shown in fig. 1, the first sound-absorbing plate 40 is provided with a plurality of first sound-absorbing holes 41, and a plurality of expansion blades 91 are distributed at intervals on the expansion plate 90; the expansion leaves 91 extend away from the center of the expansion plate 90; the number of the expansion leaves 91 is three, and the included angle between every two adjacent expansion leaves 91 is 120 degrees; the first muffling hole 41 primarily muffles the gas, a part of specific sound waves are difficult to pass through the first muffling hole 41 due to the fixed aperture of the first muffling hole 41 and are reflected back, the part of sound waves which are difficult to pass through collide back and forth between the front end portion and the first muffling plate 40, a part of energy is removed in the collision, and a part of gas passing through the first muffling hole 41 collides against the expansion blade 91 to change the original motion path, or rebounds to the side wall of the furnace body portion or rebounds to the first muffling plate 40, passes through the first muffling plate 40 and the expansion plate 90, a part of medium-high frequency noise is removed, and at this time, the noise passing through the expansion plate 90 is smaller than the noise just-entering noise.

The second sound-absorbing plate 50 includes a first sound-absorbing cotton layer 51, a second sound-absorbing cotton layer 52, and a grid 53, and the first sound-absorbing cotton layer 51 and the second sound-absorbing cotton layer 52 are respectively disposed on both sides of the grid 53. Inhale the cotton layer of sound and be sound absorbing material and make, grid plate 53 is the grid plate, and the noise can drive and inhale the cotton intraformational vibration of inhaling the sound of sound, and the vibration can arouse the friction, can make acoustic energy turn into heat energy in the friction, after the cotton layer of sound is inhaled to gas process two-layer, in addition first acoustical panel 40 and expansion plate 90's effect, the noise of most medium-high frequency has been eliminated, and because grid plate 53's net shape structure, partly low frequency noise can be eliminated in the dust collision.

The third sound-deadening plate 60 has a housing chamber 61 provided therein. The noise of the gas passing through the second sound-absorbing plate 50 is much smaller than that of the gas just entering, and the first accommodating chamber 61 can allow a part of sound waves to pass through and the other part of sound waves to be consumed by collision under the action of reflection or refraction, so that the medium-high frequency noise can be completely eliminated after the gas passes through a complex channel and a sound-absorbing material.

The fourth silencing plate 70 is provided with a plurality of second silencing holes 71, and the plurality of second silencing holes 71 are distributed at intervals and are not uniform; the plurality of second muffling holes 71 are all obliquely arranged along the axial direction of the fourth muffling plate 70, and the plurality of second muffling holes 71 are not parallel to each other. The second muffling hole 71 is obliquely arranged, so that the generated dust collides with the hole wall of the second muffling hole 71 in the process of passing through the second muffling hole 71, and the second muffling hole 71 is a small hole, so that the sound wave is continuously reflected or refracted to eliminate another part of low-frequency noise, and finally, the emission noise is very small.

One side of the mounting plate 80, which is away from the inner wall of the outer shell 30, is provided with a mounting groove, and one side of the second acoustical panel 50 is fixed in the mounting groove.

This 10 silencing device of high-speed fan is applied to fan 10, and through setting up a plurality of acoustical panels, and the structure of every acoustical panel is different, can effectively eliminate the noise of low frequency and well high frequency, and it is good to fall the performance of making an uproar, and the amortization scope is big and the noise cancelling effect is good, effectively reduces the noise that fan 10 produced, improves workman's operational environment.

The above examples only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the present invention. It should be noted that those skilled in the art will recognize that the invention may be practiced without departing from its spirit or scope. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a high-speed fan silencing device for on the fan, its characterized in that: the fan silencer comprises a device body connected with the fan, wherein the device body comprises an outer shell, a first silencing plate, a second silencing plate, a third silencing plate, a fourth silencing plate and mounting plates, wherein the first silencing plate, the second silencing plate, the third silencing plate and the fourth silencing plate are arranged in the outer shell, and the mounting plates are respectively arranged on two sides of the inner wall of the outer shell; the second acoustical panel install in the mounting panel, first acoustical panel is close to one side of second acoustical panel is provided with the expansion board.

2. The high-speed fan silencer according to claim 1, wherein: the first silencing plate, the second silencing plate, the third silencing plate and the fourth silencing plate are sequentially arranged inside the outer shell from left to right.

3. The high-speed fan silencer according to claim 1, wherein: the mounting panel deviates from a mounting groove is formed in one side of the inner wall of the outer shell, and one side of the second silencing plate is fixed in the mounting groove.

4. The high-speed fan silencer according to claim 1, wherein: a plurality of first silencing holes are formed in the first silencing plate, and a plurality of expansion blades are distributed on the expansion plate at intervals.

5. The high-speed fan silencer according to claim 4, wherein: the expansion leaves extend away from the center of the expansion plate.

6. The high-speed fan silencer according to claim 4, wherein: the number of the expansion leaves is three, and the included angle between every two adjacent expansion leaves is 120 degrees.

7. The high-speed fan silencer according to claim 1, wherein: the second acoustical panel comprises a first acoustical absorption cotton layer, a second acoustical absorption cotton layer and a grid plate, wherein the first acoustical absorption cotton layer and the second acoustical absorption cotton layer are respectively arranged on two sides of the grid plate.

8. The high-speed fan silencer according to claim 1, wherein: and an accommodating cavity is arranged in the third silencing plate.

9. The high-speed fan silencer according to claim 1, wherein: the fourth silencing plate is provided with a plurality of second silencing holes, and the plurality of second silencing holes are distributed at intervals in an uneven mode.

10. The high-speed fan silencer according to claim 9, wherein: the plurality of second silencing holes are obliquely arranged along the axis direction of the fourth silencing plate, and the plurality of second silencing holes are not parallel to each other.