Silencing equipment for centrifugal fan

Abstract

The utility model relates to the technical field of noise elimination equipment, in particular to noise elimination equipment for a centrifugal fan, which comprises a centrifugal fan silencer main body and supporting bottom feet, and further comprises a centrifugal fan interface and a side shell, and the lower end of the centrifugal fan silencer main body is fixedly connected with the supporting bottom feet. One end of the centrifugal fan silencer body is fixedly installed on the centrifugal fan connector, and a silencing assembly used for further silencing is arranged in the side shell. When the power of the centrifugal fan is increased, airflow thrust generated by the centrifugal fan is increased at the same time, the number of the noise reduction assemblies is increased through the airflow thrust, and therefore the noise reduction efficiency is automatically improved while the power of the centrifugal fan is increased, the working decibel of the centrifugal fan is controlled within a certain range, and the noise reduction efficiency of the centrifugal fan is improved. And when the centrifugal fan is not used, the air outlet in one side of the side shell can be automatically closed, so that external dust is prevented from entering the silencer main body of the centrifugal fan to influence the work of the silencer main body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a silencing equipment technical field especially uses a silencing equipment for centrifugal fan. BACKGROUND

[0002] The centrifugal fan generates a large noise when working due to the rapid flow of air, which is generally weakened by installing the centrifugal fan silencing equipment at the air outlet of the centrifugal fan.

[0003] The existing centrifugal fan silencing equipment weakens the noise generated by the centrifugal fan through sound-absorbing sheets, soundproof cotton, etc. This silencing method can only control the decibel of the centrifugal fan within a certain range when working. When the power of the centrifugal fan increases, the existing centrifugal fan silencing equipment cannot be adjusted, and it is difficult to meet the silencing demand.

[0004] In view of the above problem that the existing centrifugal fan silencing equipment cannot be adjusted when the power of the centrifugal fan increases, and it is difficult to meet the silencing demand, a silencing equipment that can automatically increase the silencing efficiency when the power of the centrifugal fan increases is designed to overcome the above problem. SUMMARY

[0005] In order to overcome the problem that the existing centrifugal fan silencing equipment cannot be adjusted when the power of the centrifugal fan increases, and it is difficult to meet the silencing demand.

[0006] The technical scheme of the utility model is as follows: a silencing equipment for centrifugal fan, comprising a centrifugal fan silencer main body and a supporting foot, further comprising a centrifugal fan interface and a side shell, the lower end of the centrifugal fan silencer main body is fixedly connected with the supporting foot, one end of the centrifugal fan silencer main body is fixedly installed with the centrifugal fan interface, the other end of the centrifugal fan silencer main body is fixedly installed with the side shell, and the side shell is provided with a silencing assembly for further silencing.

[0007] As a preferred, the silencing assembly comprises sound-absorbing sheets, the sound-absorbing sheets are slidingly arranged in the side shell, the surface of the sound-absorbing sheets is fixedly connected with clamping seats, a connecting arm is arranged between the two clamping seats, the clamping seat and the connecting arm are rotationally connected, and a shock-absorbing air bag is arranged between the two clamping seats.

[0008] As a preferred, the sound-absorbing sheets are provided in multiple groups, the height of the side shell is higher than the air outlet on one side of the centrifugal fan silencer main body, and part of the sound-absorbing sheets in the side shell are arranged on one side of the centrifugal fan silencer main body.

[0009] As a preferred, the centrifugal fan interface is provided with an air inlet, the upper end of the air inlet is fixedly connected with a connecting pipe one, the upper end of the connecting pipe one penetrates through the centrifugal fan interface, the upper end of the connecting pipe one is fixedly connected with a gas guide pipe one, the other end of the gas guide pipe one is fixedly connected with a connecting pipe two, and the other end of the connecting pipe two penetrates through the upper end of the side shell.

[0010] As preferred, a piston rod one is slidably arranged in the connecting pipe one, and a lower end of the piston rod one is fixedly connected with a push plate, and a lower end of the push plate is attached to an upper end of the sound absorption sheet, and the push plate is used for pushing the sound absorption sheet downward.

[0011] As preferred, two connecting pipes three are fixedly connected on both sides of the air inlet, one end of the connecting pipe three is fixedly connected with a gas guide pipe two, the other end of the gas guide pipe two is fixedly connected to one side of the side shell, one side of the side shell is provided with a ventilation hole, and the gas guide pipe two is symmetrically arranged at both ends of the side shell.

[0012] As preferred, a piston rod two is slidably connected to one end of the gas guide pipe two, and a cover is fixedly connected between the two piston rods two, and the cover is used for sealing the ventilation hole on one side of the side shell.

[0013] The centrifugal fan sound elimination equipment can increase the number of sound elimination components by using the airflow thrust when the power of the centrifugal fan is increased, thereby improving the sound elimination efficiency, and the sound elimination efficiency is automatically improved when the power of the centrifugal fan is increased, so that the working decibel of the centrifugal fan is controlled within a certain range, and the air outlet on one side of the side shell is automatically closed when the centrifugal fan is not used, thereby preventing dust from entering the centrifugal fan silencer main body and affecting the work. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The centrifugal fan sound elimination equipment and the centrifugal fan silencer main body are shown in the three-dimensional structure schematic view;

[0015] Figure 2 The centrifugal fan sound elimination equipment and the air inlet are shown in the three-dimensional structure schematic view;

[0016] Figure 3 The centrifugal fan sound elimination equipment and the cover are shown in the three-dimensional structure schematic view;

[0017] Figure 4 The centrifugal fan sound elimination equipment and the sound absorption sheet are shown in the three-dimensional structure schematic view;

[0018] Figure 5 The centrifugal fan sound elimination equipment Figure 3 of the present utility model is shown in the enlarged structure schematic view of A;

[0019] Figure 6 The centrifugal fan sound elimination equipment Figure 4 of the present utility model is shown in the enlarged structure schematic view of B.

[0020] Explanation of reference signs: 1, centrifugal fan silencer main body; 2, support foot; 3, centrifugal fan interface; 4, side shell; 5, sound absorption sheet; 6, clamping seat; 7, connecting arm; 8, shock absorbing air bag; 9, air inlet; 10, connecting pipe one; 11, air guide pipe one; 12, connecting pipe two; 13, piston rod one; 14, push plate; 15, connecting pipe three; 16, air guide pipe two; 17, piston rod two; 18, cover. DETAILED DESCRIPTION

[0021] The utility model is further explained in connection with the drawings and examples.

[0022] Please refer to Figure 1 Figure 6 The utility model provides a kind of example: a kind of silencing equipment for centrifugal fan, including centrifugal fan silencer main body 1 and support foot 2, further including centrifugal fan interface 3 and side shell 4, centrifugal fan silencer main body 1 lower end is fixedly connected with support foot 2, one end of centrifugal fan silencer main body 1 is fixedly installed with centrifugal fan interface 3, the other end of centrifugal fan silencer main body 1 is fixedly installed with side shell 4, side shell 4 is equipped with the sound absorption assembly for further silencing, this silencing equipment for centrifugal fan can when the power of centrifugal fan increases, the airflow thrust generated by centrifugal fan is increased simultaneously, the number of sound absorption assembly is increased using the thrust of airflow, improve sound absorption efficiency, so as to control the working decibel of centrifugal fan in certain range.

[0023] Please refer to Figure 2 Figure 6 In the embodiment, sound absorption assembly includes sound absorption sheet 5, sound absorption sheet 5 is slidably arranged in side shell 4, the surface of sound absorption sheet 5 is fixedly connected with clamping seat 6, connecting arm 7 is equipped between the two clamping seats 6, clamping seat 6 is rotationally connected with connecting arm 7, shock absorbing air bag 8 is equipped between the two clamping seats 6, sound absorption sheet 5 is equipped with multiple groups, the height of side shell 4 is higher than the one side air outlet of centrifugal fan silencer main body 1, part sound absorption sheet 5 in side shell 4 is arranged at one side of centrifugal fan silencer main body 1, air inlet 9 is equipped in centrifugal fan interface 3, the upper end of air inlet 9 is fixedly connected with connecting pipe one 10, the upper end of connecting pipe one 10 passes through centrifugal fan interface 3, the upper end of connecting pipe one 10 is fixedly connected with air guide pipe one 11, the other end of air guide pipe one 11 is fixedly connected with connecting pipe two 12, the other end of connecting pipe two 12 passes through the upper end of side shell 4, piston rod one 13 is slidably arranged in connecting pipe one 10, the lower end of piston rod one 13 is fixedly connected with push plate 14, the lower end of push plate 14 is attached with the upper end of sound absorption sheet 5, push plate 14 is used to push sound absorption sheet 5 downward, sound absorption sheet 5 at the upper end of side shell 4 does not participate in work when the power of centrifugal fan is normal, only when the power of centrifugal fan increases, sound absorption sheet 5 at the upper end is pressed down by airflow, participates in work, improves sound absorption efficiency. ​​

[0024] Please refer to Figure 2 and Figure 3 In this embodiment, the two sides of the air inlet 9 are fixedly connected with the connecting pipe three 15, one end of the connecting pipe three 15 is fixedly connected with the air guide pipe two 16, the other end of the air guide pipe two 16 is fixedly connected with one side of the side shell 4, one side of the side shell 4 is provided with a ventilation hole, the air guide pipe two 16 is symmetrically arranged at both ends of the side shell 4, one end of the air guide pipe two 16 is slidably connected with the piston rod two 17, the two piston rods two 17 are fixedly connected with the cover 18, and the cover 18 is used to seal the ventilation hole on one side of the side shell 4.

[0025] Before use, first, the centrifugal fan interface 3 on one side of the centrifugal fan silencer body 1 is fixedly connected with the air outlet of the centrifugal fan, when the centrifugal fan is used, the centrifugal fan silencer body 1 can weaken the noise generated by the centrifugal fan when the centrifugal fan is working, if the power of the centrifugal fan is increased, the centrifugal fan silencer body 1 cannot meet the noise reduction requirement, at this time, part of the airflow enters the air inlet 9, then enters the connecting pipe one 10, and then enters the connecting pipe two 12 through the air guide pipe one 11, after the power of the centrifugal fan is increased, the thrust of the airflow will also increase, the airflow will push the piston rod one 13 slidably arranged in the connecting pipe two 12 to move downward, the push plate 14 fixedly connected with the lower end of the piston rod one 13 will press the sound absorbing sheet 5 at the upper end of the side shell 4 downward, so that more sound absorbing sheets 5 are located on one side of the centrifugal fan silencer body 1, and the distance between the sound absorbing sheets 5 is reduced at the same time, so that the noise reduction efficiency is increased, so that the noise reduction efficiency is automatically increased when the power of the centrifugal fan is increased, so that the noise reduction requirement can be met.

[0026] The shock absorbing air bag 8 arranged between the sound absorbing sheets 5 not only facilitates the change of the distance between the sound absorbing sheets 5, but also isolates the contact of each sound absorbing sheet 5, so that noise is not easily generated when the sound absorbing sheet 5 works, the connecting arm 7 is used for connecting between each sound absorbing sheet 5, and the shock absorbing air bag 8 will not be deviated when compressed under the cooperation of the clamping seat 6.

[0027] When in use, part of the airflow entering the air inlet 9 will enter the air guide pipe two 16 from the connecting pipe three 15 on both sides, the airflow entering the air guide pipe two 16 will push the piston rod two 17 to move upward, the cover 18 fixedly connected between the two piston rods two 17 will move upward at the same time to open, so that the centrifugal fan can be discharged from the air outlet on one side of the side shell 4, when the centrifugal fan is stopped, the cover 18 will automatically fall down to block the air outlet on one side of the side shell 4, so that when the centrifugal fan is not used, the dust from the outside can be prevented from entering to affect the work of the centrifugal fan silencer body 1.

[0028] Through the above steps, the centrifugal fan with silencing device can increase the number of silencing components by using the airflow thrust when the power of the centrifugal fan is increased, thereby improving the silencing efficiency, so that the silencing efficiency is automatically improved while the power of the centrifugal fan is increased, thereby controlling the working decibel of the centrifugal fan within a certain range, and when the centrifugal fan is not used, the air outlet on one side of the side shell 4 is automatically closed, thereby preventing external dust from entering the centrifugal fan silencer body 1 and affecting its work.

[0029] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A silencing device for centrifugal fan, comprising a centrifugal fan silencer body (1) and a supporting foot (2); characterized in that: Also include centrifugal fan interface (3) and side shell (4), centrifugal fan muffler body (1) lower end fixedly connected with support foot (2), one end of centrifugal fan muffler body (1) fixedly connected with centrifugal fan interface (3), the other end of centrifugal fan muffler body (1) fixedly connected with side shell (4), side shell (4) is equipped with sound-absorbing assembly for further sound-absorbing, sound-absorbing assembly includes sound-absorbing sheet (5), sound-absorbing sheet (5) is slidably arranged in side shell (4), the surface of sound-absorbing sheet (5) is fixedly connected with the clamping seat (6), the connecting arm (7) is arranged between two clamping seats (6), the clamping seat (6) is rotatably connected with the connecting arm (7), the shock-absorbing air bag (8) is arranged between two clamping seats (6), sound-absorbing sheet (5) is equipped with multiple groups, the height of side shell (4) is higher than the one side air outlet of centrifugal fan muffler body (1), part of sound-absorbing sheet (5) in side shell (4) is arranged at one side of centrifugal fan muffler body (1), the air inlet (9) is arranged in centrifugal fan interface (3), the upper end of air inlet (9) is fixedly connected with connecting pipe one (10), the upper end of connecting pipe one (10) passes through centrifugal fan interface (3), the upper end of connecting pipe one (10) is fixedly connected with air guide pipe one (11), the other end of air guide pipe one (11) is fixedly connected with connecting pipe two (12), the other end of connecting pipe two (12) passes through the upper end of side shell (4).

2. The silencing apparatus for a centrifugal fan according to claim 1, characterized by: The piston rod one (13) is slidably arranged in connecting pipe one (10), the lower end of piston rod one (13) is fixedly connected with push plate (14), the lower end of push plate (14) is attached to the upper end of sound-absorbing sheet (5), and push plate (14) is used to push sound-absorbing sheet (5) downward.

3. The silencing apparatus for a centrifugal fan according to claim 2, characterized in that: The connecting pipe three (15) is fixedly connected with the air guide pipe two (16) on one end, and the other end of the air guide pipe two (16) is fixedly connected to one side of the side shell (4). One side of the side shell (4) is provided with a ventilation hole, and the air guide pipe two (16) is symmetrically arranged at both ends of the side shell (4).

4. The silencing apparatus for a centrifugal fan according to claim 3, characterized in that: The piston rod two (17) is slidably connected in one end of the air guide pipe two (16), and the cover (18) is fixedly connected between the two piston rod two (17). The cover (18) is used to seal the ventilation hole on one side of the side shell (4).

Images