CN118309691B - A variable ducted stainless steel silencer box for fan silencing - Google Patents
A variable ducted stainless steel silencer box for fan silencing Download PDFInfo
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- CN118309691B CN118309691B CN202410495391.2A CN202410495391A CN118309691B CN 118309691 B CN118309691 B CN 118309691B CN 202410495391 A CN202410495391 A CN 202410495391A CN 118309691 B CN118309691 B CN 118309691B
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- outer cylinder
- middle section
- silencer
- main body
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- 230000003584 silencer Effects 0.000 title claims abstract description 38
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 15
- 239000010935 stainless steel Substances 0.000 title claims abstract description 15
- 230000030279 gene silencing Effects 0.000 title claims description 242
- 230000001603 reducing effect Effects 0.000 claims description 95
- 238000005192 partition Methods 0.000 claims description 16
- 238000002955 isolation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 230000001743 silencing effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明公开了一种用于风机消音的可变涵道式不锈钢消音箱，包括主体消音结构，与主体消音结构相连通的中段消音结构以及尾端消音结构；主体消音结构包括共轴布置的主体消音外筒和主体消音内筒，主体消音内筒设置在主体消音外筒内部，主体消音内筒外侧壁与主体消音外筒内侧壁之间形成消音流通通道；消音流通通道内设有涵道变径机构，包括多个第一变径导流叶片和第二变径导流叶片，共同形成一个环形的涵道变径导流环；该消音箱具备高效的降噪功能，能有效吸收、反射和消减隔离噪音，降低风机运行时以及空气流通时产生的噪音水平；考虑因空气流速的差异，而产生频率差异化的噪音，因此将主体消音结构设计为可变涵道式的结构，能够应对多种复杂情况下的噪音。
The present invention discloses a variable ducted stainless steel silencer box for fan silencer, comprising a main silencer structure, a middle silencer structure connected to the main silencer structure, and a tail silencer structure; the main silencer structure comprises a coaxially arranged main silencer outer cylinder and a main silencer inner cylinder, the main silencer inner cylinder is arranged inside the main silencer outer cylinder, and a silencer circulation channel is formed between the outer wall of the main silencer inner cylinder and the inner wall of the main silencer outer cylinder; a duct variable diameter mechanism is provided in the silencer circulation channel, comprising a plurality of first variable diameter guide blades and a second variable diameter guide blades, which together form an annular duct variable diameter guide ring; the silencer box has a highly efficient noise reduction function, can effectively absorb, reflect and reduce isolation noise, and reduce the noise level generated when the fan is running and when the air is circulating; considering the noise with differentiated frequencies generated due to the difference in air flow rate, the main silencer structure is designed as a variable ducted structure, which can cope with noise in a variety of complex situations.
Description
Technical Field
The invention relates to the technical field of silencing boxes, in particular to a variable duct type stainless steel silencing box for silencing a fan.
Background
The sound-eliminating box is characterized in that for the air flow pipeline with noise transmission, the pipeline with sound absorption lining and elbow, or the sectional area suddenly changed, or other acoustic impedance means can be utilized to attenuate or reflect the noise in the pipeline.
Most of the existing sound-absorbing boxes adopt an impedance composite sound-absorbing principle, so that the structure is complex, the weight is large, the adopted high-temperature oxidation sound-absorbing filler is poor in impact resistance, the high-speed airflow is easy to damage after impacting the sound-absorbing filler, the sound-absorbing and noise-reducing effects are further affected, the existing sound-absorbing filler is easy to be permeated by water gas, the performance of the sound-absorbing filler is greatly reduced, and frequent maintenance is needed.
Disclosure of Invention
The invention aims to provide a variable duct type stainless steel silencing box for silencing a fan, which can better realize the silencing effect of the fan.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A variable duct type stainless steel silencing box for silencing a fan comprises a main body silencing structure, a middle section silencing structure and a tail end silencing structure, wherein the middle section silencing structure and the tail end silencing structure are communicated with the main body silencing structure;
The main body silencing structure comprises a main body silencing outer cylinder and a main body silencing inner cylinder which are coaxially arranged, and a silencing circulation channel is formed between the outer side wall of the main body silencing inner cylinder and the inner side wall of the main body silencing outer cylinder;
The silencing circulation channel is internally provided with a duct reducing mechanism, the duct reducing mechanism comprises a plurality of first reducing guide vanes and second reducing guide vanes, and the first reducing guide vanes and the second reducing guide vanes jointly form an annular duct reducing guide ring;
A plurality of first reducing driving accommodating cylinders communicated with the inside of the silencing circulation channel are fixed on the outer side wall of the main body silencing outer cylinder, first reducing driving connecting rods are connected in a sliding manner in the first reducing driving accommodating cylinders, and the first reducing driving connecting rods are fixedly connected with the first reducing guide vanes in a one-to-one correspondence manner;
A plurality of second reducing drive accommodating cylinders communicated with the inside of the silencing circulation channel are fixed on the inner side wall of the main body silencing inner cylinder, second reducing drive connecting rods are connected in a sliding mode in the second reducing drive accommodating cylinders, and the second reducing drive connecting rods are fixedly connected with the second reducing guide vanes in a one-to-one correspondence mode.
Preferably, an auxiliary reducing structure is arranged in the silencing circulation channel, and the auxiliary reducing structure comprises a plurality of first auxiliary silencing pipes fixed on the inner side wall of the main body silencing outer cylinder and a plurality of second auxiliary silencing pipes fixed on the outer side wall of the main body silencing inner cylinder.
The auxiliary reduction structure can carry out fine adjustment turbulence on the air flow in the channel, so that the mutual cancellation effect of the vibration frequencies of the auxiliary reduction structure is more obvious.
Preferably, the outer side wall of the main body silencing outer cylinder is provided with a vibration reduction mechanism, the vibration reduction mechanism comprises a plurality of vibration reduction accommodating boxes fixed on the outer side wall of the main body silencing outer cylinder, two mutually parallel vibration reduction plates are fixed in the vibration reduction accommodating boxes, and the vibration reduction plates are fixedly connected with the inner side wall of the vibration reduction accommodating boxes through a plurality of vibration reduction supporting springs.
The vibration reduction mechanism can effectively buffer and reduce the additional vibration generated by the integral structure of the main body silencing structure in the working process.
Preferably, the middle section silencing structure comprises a middle section silencing outer barrel, a middle section silencing support frame is fixed in the middle section silencing outer barrel, a middle section compensation mechanism is arranged on the middle section silencing support frame, and the middle section compensation mechanism comprises a plurality of middle section compensation silencing plates arranged on the middle section silencing support frame;
the middle compensating silencer plates are surrounded together to form a silencing compensating regulating ring.
The main body silencing structure can not reduce the noise of all frequency bands, the main body silencing structure is utilized to reduce the noise of most frequency bands, and then the middle section silencing structure is utilized to further reduce the airflow vibration noise of the residual frequency bands, so that a better noise reduction and silencing effect is realized.
Preferably, a plurality of compensation adjustment sliding rails extending along the radial direction of the middle section silencing outer cylinder are fixed on the middle section silencing support frame, a compensation adjustment sliding block is connected to the compensation adjustment sliding rail in a sliding manner, a compensation adjustment support shaft is fixed at the top of the compensation adjustment sliding block, a compensation adjustment support ring is connected to the compensation adjustment support shaft in a rotating manner, and a middle section compensation silencing plate is fixedly connected with the compensation adjustment support ring.
The device has the advantages that the compensation adjusting sliding rail and the compensation adjusting sliding block are utilized to adjust the radial synchronous movement of each middle-section compensation silencing plate along the middle-section silencing outer barrel so as to adjust the relative distance between the silencing compensation adjusting ring and the inner side wall of the middle-section silencing outer barrel, and further, the device can cope with noise in various frequency bands to reduce the noise.
Preferably, a middle section compensation self-adaptive structure is arranged in the middle section silencing outer cylinder, and the middle section compensation self-adaptive structure comprises a plurality of pairs of middle section self-adaptive adjusting plates;
A plurality of C-shaped self-adaptive adjusting supporting frames are fixed on the inner side wall of the middle-section silencing outer cylinder, the inner side of each self-adaptive adjusting supporting frame is rotationally connected with a self-adaptive adjusting supporting shaft extending along the axis parallel to the middle-section silencing outer cylinder, a middle-section self-adaptive adjusting plate is fixedly connected with the self-adaptive adjusting supporting shaft, and the self-adaptive adjusting supporting shafts are driven to rotate by a servo motor.
The middle section compensating silencer plate and the middle section silencing outer barrel inner side wall always keep a fixed grid distance by adjusting the deflection of the middle section self-adaptive adjusting plate so as to adapt to the distance adjustment between each middle section compensating silencer plate and the middle section silencing outer barrel inner side wall, and negative interference among all air circulation channels is avoided.
Preferably, the middle section self-adaptive adjusting plate is internally of a hollow structure, a plurality of filling partition plates are fixed in the middle section self-adaptive adjusting plate, and a silencing filling cavity is formed between every two adjacent filling partition plates.
Preferably, the middle section compensation silencer plate is of a hollow structure, and a plurality of resonance frequency adjusting filling shells are fixed on the inner side wall of the middle section compensation silencer plate.
By filling different media into the resonance frequency adjusting filling shell and the silencing filling cavity, the silencing and noise reducing effects of the whole structure can be fine-tuned.
Preferably, the tail end silencing structure comprises a tail end silencing containing cylinder, and a plurality of independent silencers are arranged in the tail end silencing containing cylinder;
The independent silencer comprises an independent silencer outer barrel, a first silencing baffle plate, a middle silencing baffle plate and a second silencing baffle plate are sequentially fixed in the independent silencer outer barrel from top to bottom, a first silencing chamber is formed between the first silencing baffle plate and the middle silencing baffle plate, and a second silencing chamber is formed between the second silencing baffle plate and the inner bottom of the independent silencer outer barrel;
The bottom of the outer barrel of the independent silencer is fixedly provided with a silencing input pipe communicated with the first silencing chamber, the lower end of the silencing input pipe is communicated with the inside of the middle silencing outer barrel, the top of the outer barrel of the independent silencer is fixedly provided with a silencing output pipe communicated with the second silencing chamber, and the first silencing chamber is communicated with the second silencing chamber through an intermediate communicating pipe.
The noise vibration wave is reflected back and forth between the inner side walls of the first silencing chamber and the second silencing chamber, and the wave crest and the wave trough of the noise can be mutually counteracted by utilizing the principle of vibration wave phase difference, so that noise is reduced.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has reasonable structural design, has high-efficiency noise reduction function, can effectively absorb, reflect and reduce isolation noise, and reduces the noise level generated when the fan operates and when air circulates;
2. According to the invention, the noise with different frequencies is generated due to the difference of air flow rates in the design of the silencing box, so that the main silencing structure is designed into a variable bypass structure, and the noise under various complex conditions can be dealt with;
3. the invention is generally matched with the middle section silencing structure and the tail end silencing structure, so that the noise of the running and air circulation of the fan can be reduced to a very low level;
4. In the structure, different media are filled in the resonance frequency adjusting filling shell and the silencing filling cavity, so that the silencing and noise reducing effects of the whole structure can be finely adjusted, and the aim of better noise reduction treatment is fulfilled.
Drawings
FIG. 1 is a schematic general construction of the present invention;
FIG. 2 is a top view of the main body sound attenuating structures of the present invention;
FIG. 3 is a top view of the shock absorbing mechanism of the present invention;
FIG. 4 is a front view of a mid-section sound attenuating structure of the present invention;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is an enlarged partial schematic view at A in FIG. 4;
FIG. 7 is a schematic cross-sectional view of a mid-section compensating muffler plate of the present invention;
FIG. 8 is a schematic cross-sectional view of a mid-section adaptive adjustment plate of the present invention;
FIG. 9 is a top view of the tail end sound attenuating structures of the present invention;
FIG. 10 is a schematic view of the construction of the independent muffler of the present invention;
fig. 11 is a top view of fig. 10.
In the drawing the view of the figure, 10-main body silencing structure, 11-main body silencing outer cylinder, 12-main body silencing inner cylinder, 100-silencing circulation channel, 13-duct reducing mechanism, 130-duct reducing guide ring, 131-first reducing guide vane, 132-second reducing guide vane, 133-first reducing drive cylinder, 134-first reducing drive connecting rod, 135-second reducing drive accommodating cylinder, 136-second reducing drive connecting rod, 137-first reducing drive rod, 138-second reducing drive rod, 14-auxiliary reducing structure, 141-first auxiliary silencing tube, 142-second auxiliary silencing tube, 15-vibration reducing mechanism, 151-vibration reducing accommodating box, 152-vibration reducing plate, 153-vibration reducing spring 20-middle section silencing structure, 21-middle section silencing outer cylinder, 211-middle section silencing support frame, 22-middle section compensating mechanism, 2201-silencing compensation adjusting ring, 220-middle section compensation silencing plate, 221-compensation adjusting slide rail, 222-compensation adjusting slide block, 223-compensation adjusting supporting shaft, 224-compensation adjusting supporting ring, 23-middle section compensation self-adapting structure, 231-middle section self-adapting adjusting plate, 232-self-adapting supporting frame, 233-self-adapting supporting shaft, 241-filling partition plate, 242-silencing filling cavity, 30-tail end silencing structure, 31-tail end silencing containing cylinder, 32-independent silencer, 320-independent silencer outer cylinder, 321-first silencing partition plate, 322-middle silencing partition plate, 323-second silencing partition plate, 324-first silencing chamber, 325-second silencing chamber, 326-silencing input pipe, 327-silencing output pipe, 328-intermediate communicating pipe.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 11, and for convenience of description, the orientation will be defined below such that the vertical, horizontal, front-rear directions will be identical to the vertical, horizontal, front-rear directions of the respective front views or the projection relationship of the structural schematic diagrams themselves.
Example 1:
a variable duct type stainless steel silencing box for silencing a fan, as shown in figure 1, comprises a main silencing structure 10, a middle silencing structure 20 and a tail silencing structure 30, wherein the middle silencing structure 20 and the tail silencing structure 30 are communicated with the main silencing structure 10;
As shown in fig. 2, the main body silencing structure 10 includes a main body silencing outer tube 11 and a main body silencing inner tube 12 coaxially arranged, the main body silencing inner tube 12 being provided inside the main body silencing outer tube 11, a silencing flow passage 100 being formed between an outer side wall of the main body silencing inner tube 12 and an inner side wall of the main body silencing outer tube 11;
The silencing flow passage 100 is internally provided with a duct reducing mechanism 13, the duct reducing mechanism 13 comprises a plurality of first reducing guide vanes 131 and second reducing guide vanes 132, and the first reducing guide vanes 131 and the second reducing guide vanes 132 jointly form an annular duct reducing guide ring 130;
A plurality of first reducing driving accommodating cylinders 133 communicated with the interior of the silencing circulation channel 100 are fixed on the outer side wall of the main body silencing outer cylinder 11, first reducing driving connecting rods 134 are slidably connected in the first reducing driving accommodating cylinders 133, and the plurality of first reducing driving connecting rods 134 are fixedly connected with the first reducing guide vanes 131 in a one-to-one correspondence manner;
a plurality of second reducing driving accommodating cylinders 135 communicated with the inside of the silencing circulation channel 100 are fixed on the inner side wall of the main silencing inner cylinder 12, second reducing driving connecting rods 136 are connected in a sliding manner in the second reducing driving accommodating cylinders 135, and the second reducing driving connecting rods 136 are fixedly connected with the second reducing guide vanes 132 in a one-to-one correspondence manner;
The first diameter-variable drive accommodating cylinder 133 is provided with a first diameter-variable drive rod 137 for driving the first diameter-variable drive link 134 to slide, and the second diameter-variable drive accommodating cylinder 135 is provided with a second diameter-variable drive rod 138 for driving the second diameter-variable drive link 136 to slide.
As shown in fig. 4, the middle-section silencing structure 20 includes a middle-section silencing outer cylinder 21, a middle-section silencing supporting frame 211 is fixed in the middle-section silencing outer cylinder 21, a middle-section compensating mechanism 22 is installed on the middle-section silencing supporting frame 211, and the middle-section compensating mechanism 22 includes a plurality of middle-section compensating silencing plates 220 installed on the middle-section silencing supporting frame 211;
The plurality of middle compensating muffler plates 220 together encircle to form a compensating muffler ring 2201.
As shown in fig. 9, the tail end sound deadening structure 30 includes a tail end sound deadening accommodating cylinder 31, and a plurality of independent sound deadening devices 32 are installed in the tail end sound deadening accommodating cylinder 31;
As shown in fig. 10, the independent muffler 32 includes an independent muffler outer cylinder 320, a first sound-deadening partition 321, an intermediate sound-deadening partition 322 and a second sound-deadening partition 323 are fixed in the independent muffler outer cylinder 320 in this order from top to bottom, a first sound-deadening chamber 324 is formed between the first sound-deadening partition 321 and the intermediate sound-deadening partition 322, and a second sound-deadening chamber 325 is formed between the second sound-deadening partition 323 and the inner bottom of the independent muffler outer cylinder 320;
The bottom of the independent muffler outer cylinder 320 is fixed with a silencing input pipe 326 communicated with the first silencing chamber 324, the lower end of the silencing input pipe 326 is communicated with the inside of the middle silencing outer cylinder 21, the top of the independent muffler outer cylinder 320 is fixed with a silencing output pipe 327 communicated with the second silencing chamber 325, and the first silencing chamber 324 is communicated with the second silencing chamber 325 through an intermediate communicating pipe 328.
Example 2:
On the basis of embodiment 1, as shown in fig. 2, an auxiliary reducing structure 14 is provided in the sound deadening flow passage 100, and the auxiliary reducing structure 14 includes a plurality of first auxiliary sound deadening pipes 141 fixed to the inner side wall of the main body sound deadening outer cylinder 11, and a plurality of second auxiliary sound deadening pipes 142 fixed to the outer side wall of the main body sound deadening inner cylinder 12.
Example 3:
On the basis of embodiment 2, as shown in fig. 2, the outer side wall of the main body silencing outer cylinder 11 is provided with a vibration reducing mechanism 15, as shown in fig. 3, the vibration reducing mechanism 15 comprises a plurality of vibration reducing accommodating boxes 151 fixed on the outer side wall of the main body silencing outer cylinder 11, two mutually parallel vibration reducing plates 152 are fixed in the vibration reducing accommodating boxes 151, and the vibration reducing plates 152 are fixedly connected with the inner side walls of the vibration reducing accommodating boxes 151 through a plurality of vibration reducing supporting springs 153.
Example 4:
On the basis of embodiment 3, as shown in fig. 5 and 6, a plurality of compensation adjustment sliding rails 221 extending radially along the middle-section silencing outer cylinder 21 are fixed on the middle-section silencing supporting frame 211, a compensation adjustment sliding block 222 is slidably connected to the compensation adjustment sliding rail 221, the compensation adjustment sliding block 222 is driven by a servo motor to move along the compensation adjustment sliding rail 221, a compensation adjustment supporting shaft 223 is fixed at the top of the compensation adjustment sliding block 222, a compensation adjustment supporting ring 224 is rotatably connected to the compensation adjustment supporting shaft 223, the compensation adjustment supporting ring 224 is driven by the servo motor to rotate around the axis of the compensation adjustment supporting shaft 223, and the middle-section compensation silencing plate 220 is fixedly connected with the compensation adjustment supporting ring 224.
Example 5:
on the basis of embodiment 4, as shown in fig. 4 and 5, a middle section compensation self-adapting structure 23 is arranged in the middle section silencing outer cylinder 21, and the middle section compensation self-adapting structure 23 comprises a plurality of pairs of middle section self-adapting adjusting plates 231;
A plurality of C-shaped self-adaptive adjusting supporting frames 232 are fixed on the inner side wall of the middle-section silencing outer cylinder 21, self-adaptive adjusting supporting shafts 233 extending along the axis parallel to the middle-section silencing outer cylinder 21 are rotatably connected to the inner side of the self-adaptive adjusting supporting frames 232, the middle-section self-adaptive adjusting plates 231 are fixedly connected with the self-adaptive adjusting supporting shafts 233, and the self-adaptive adjusting supporting shafts 233 are driven to rotate by a servo motor.
As shown in fig. 8, the middle section self-adaptive adjusting plate 231 has a hollow structure, a plurality of filling partition plates 241 are fixed inside the middle section self-adaptive adjusting plate 231, a noise reduction filling chamber 242 is formed between two adjacent filling partition plates 241, and purified water is filled in the noise reduction filling chamber 242.
As shown in fig. 7, the middle compensating silencer 220 has a hollow structure, and a plurality of resonance frequency adjusting filling cases 229 are fixed on the inner side wall of the middle compensating silencer 220, and purified water is filled in the resonance frequency adjusting filling cases 229.
Example 6:
Unlike embodiment 5, the sound deadening filling chamber 242 is filled with 5.0bar of compressed air, and the resonance frequency adjusting filling case 229 is filled with 5.0bar of compressed air.
Example 7:
Unlike embodiment 5, the sound deadening filling chamber 242 is filled with helium gas of 8.0bar, and the resonance frequency adjusting filling case 229 is filled with helium gas of 8.0 bar.
Example 8:
Unlike embodiment 5, the inside of sound deadening filling chamber 242 is filled with 10.0bar of carbon dioxide gas, and the inside of resonance frequency adjusting filling case 229 is filled with 12.0bar of carbon dioxide gas.
In the practical application process, fresh air is conveyed into the main body silencing structure 10 by the fan, the fresh air enters the silencing circulation channel 100 from top to bottom, the flowing air is divided into two parts by the annular duct reducing guide ring 130, noise vibration is reflected back and forth between the inner side wall of the main body silencing outer cylinder 11 and the duct reducing guide ring 130 and between the duct reducing guide ring 130 and the outer side wall of the main body silencing inner cylinder 12 in the circulation process of the two parts, the noise vibration separated in the two parts of spaces has vibration influence on the first reducing guide vane 131 and the second reducing guide vane 132, and the noise vibration phase difference in the two parts of spaces is utilized for mutual reduction vibration, so that the silencing function is realized;
The inner rod of the first reducing driving rod 137 stretches out to drive the first reducing driving connecting rod 134 to extend along the radial direction of the main body silencing outer cylinder 11 together with the first reducing guide vane 131, the inner rod of the second reducing driving rod 138 stretches back to drive the second reducing driving connecting rod 136 to extend along the radial direction of the main body silencing outer cylinder 11 together with the second reducing guide vane 132, and the plurality of first reducing guide vanes 131 and the plurality of second reducing guide vanes 132 synchronously move so as to adjust the relative spacing proportion between the inner side wall of the main body silencing outer cylinder 11 and the duct reducing guide ring 130 and between the duct reducing guide ring 130 and the outer side wall of the main body silencing inner cylinder 12, thereby adjusting the overall noise reduction effect of the main body silencing structure 10;
the flowing air is discharged from the upper end of the silencing circulation channel 100 and enters the middle silencing outer cylinder 21, the air flows through the middle silencing outer cylinder 21 from bottom to top, and the flowing air is divided into an inner part and an outer part by utilizing a silencing compensation adjusting ring 2201 formed by a plurality of middle compensation silencing plates 220, so that noise vibration is mutually reduced by utilizing a vibration phase difference principle;
The servo motor drives the compensation adjusting slide blocks 222 to move along the compensation adjusting slide rails 221, the compensation adjusting slide blocks 222 drive the middle-section compensation silencing plates 220 to move along the radial direction of the middle-section silencing outer cylinder 21, and the plurality of middle-section compensation silencing plates 220 synchronously move along the radial direction of the middle-section silencing outer cylinder 21 so as to adjust the relative distance between the silencing compensation adjusting ring 2201 and the inner side wall of the middle-section silencing outer cylinder 21, and further adjust the integral noise reduction effect of the middle-section silencing structure 20;
The flowing air enters the first silencing chamber 324 through the silencing input pipe 326 after being discharged from the upper end of the middle silencing outer cylinder 21, the air in the first silencing chamber 324 is returned to the second silencing chamber 325 through the middle communicating pipe 328, the reciprocating reflection of noise vibration waves by the side walls of the first silencing chamber 324 and the second silencing chamber 325 is utilized, the noise vibration is mutually reduced by utilizing the principle of vibration phase difference, finally the air in the second silencing chamber 325 is discharged through the silencing output pipe 327, and the air discharged from the silencing output pipe 327 is conveyed to each floor and each room through the ventilation pipeline.
Claims (8)
1. The variable duct type stainless steel silencing box for silencing the fan is characterized by comprising a main body silencing structure (10), a middle section silencing structure (20) and a tail end silencing structure (30), wherein the middle section silencing structure (20) and the tail end silencing structure (30) are communicated with the main body silencing structure (10);
The main body silencing structure (10) comprises a main body silencing outer cylinder (11) and a main body silencing inner cylinder (12) which are coaxially arranged, wherein a silencing circulation channel (100) is formed between the outer side wall of the main body silencing inner cylinder (12) and the inner side wall of the main body silencing outer cylinder (11);
A duct reducing mechanism (13) is arranged in the silencing circulation channel (100), the duct reducing mechanism (13) comprises a plurality of first reducing guide vanes (131) and second reducing guide vanes (132), and the first reducing guide vanes (131) and the second reducing guide vanes (132) form an annular duct reducing guide ring (130) together;
A plurality of first reducing driving accommodating cylinders (133) communicated with the inside of the silencing circulation channel (100) are fixed on the outer side wall of the main body silencing outer cylinder (11), first reducing driving connecting rods (134) are connected in a sliding mode in the first reducing driving accommodating cylinders (133), and the first reducing driving connecting rods (134) are fixedly connected with the first reducing guide vanes (131) in a one-to-one correspondence mode;
a plurality of second reducing driving accommodating cylinders (135) communicated with the inside of the silencing circulation channel (100) are fixed on the inner side wall of the main body silencing inner cylinder (12), second reducing driving connecting rods (136) are connected in a sliding manner in the second reducing driving accommodating cylinders (135), and the second reducing driving connecting rods (136) are fixedly connected with the second reducing guide vanes (132) in a one-to-one correspondence manner;
The middle section silencing structure (20) comprises a middle section silencing outer cylinder (21), a middle section silencing support frame (211) is fixed in the middle section silencing outer cylinder (21), a middle section compensating mechanism (22) is arranged on the middle section silencing support frame (211), and the middle section compensating mechanism (22) comprises a plurality of middle section compensating silencing plates (220) arranged on the middle section silencing support frame (211);
the middle compensating silencer plates (220) are jointly surrounded to form a silencing compensating adjusting ring (2201).
2. The variable duct type stainless steel sound-deadening box for fan sound-deadening according to claim 1, characterized in that an auxiliary sound-deadening structure (14) is provided in the sound-deadening circulation channel (100), the auxiliary sound-deadening structure (14) comprising a plurality of first auxiliary sound-deadening pipes (141) fixed to the inner side wall of the main body sound-deadening outer cylinder (11), and a plurality of second auxiliary sound-deadening pipes (142) fixed to the outer side wall of the main body sound-deadening inner cylinder (12).
3. The variable duct type stainless steel silencing box for silencing a fan according to claim 1, wherein a vibration reduction mechanism (15) is arranged on the outer side wall of the main body silencing outer barrel (11), the vibration reduction mechanism (15) comprises a plurality of vibration reduction accommodating boxes (151) fixed on the outer side wall of the main body silencing outer barrel (11), two mutually parallel vibration reduction plates (152) are fixed in the vibration reduction accommodating boxes (151), and the vibration reduction plates (152) are fixedly connected with the inner side wall of the vibration reduction accommodating boxes (151) through a plurality of vibration reduction supporting springs (153).
4. The variable duct type stainless steel silencing box for silencing a fan according to claim 1, wherein a plurality of compensation adjusting sliding rails (221) extending along the radial direction of the middle-section silencing outer cylinder (21) are fixed on the middle-section silencing supporting frame (211), compensation adjusting sliding blocks (222) are connected to the compensation adjusting sliding rails (221) in a sliding mode, compensation adjusting supporting shafts (223) are fixed at the tops of the compensation adjusting sliding blocks (222), compensation adjusting supporting rings (224) are connected to the compensation adjusting supporting shafts (223) in a rotating mode, and the middle-section compensation silencing plates (220) are fixedly connected with the compensation adjusting supporting rings (224).
5. A variable duct type stainless steel silencing box for silencing a fan according to claim 1, wherein a middle section compensation self-adapting structure (23) is arranged in the middle section silencing outer cylinder (21), and the middle section compensation self-adapting structure (23) comprises a plurality of pairs of middle section self-adapting adjusting plates (231);
a plurality of C-shaped self-adaptive adjusting supporting frames (232) are fixed on the inner side wall of the middle-section silencing outer cylinder (21), self-adaptive adjusting supporting shafts (233) extending along the axis parallel to the middle-section silencing outer cylinder (21) are connected to the inner side of the self-adaptive adjusting supporting frames (232) in a rotating mode, the middle-section self-adaptive adjusting plates (231) are fixedly connected with the self-adaptive adjusting supporting shafts (233), and the self-adaptive adjusting supporting shafts (233) are driven by a servo motor to rotate.
6. The variable duct type stainless steel silencing box for silencing a fan according to claim 5, wherein the middle section self-adaptive adjusting plate (231) is of a hollow structure, a plurality of filling partition plates (241) are fixed inside the middle section self-adaptive adjusting plate (231), and a silencing filling cavity (242) is formed between two adjacent filling partition plates (241).
7. The variable duct type stainless steel silencing box for silencing a fan according to claim 1, wherein the middle section compensating silencing plate (220) is of a hollow structure, and a plurality of resonance frequency adjusting filling shells (229) are fixed on the inner side wall of the middle section compensating silencing plate (220).
8. The variable bypass stainless steel sound-deadening box for fan sound-deadening according to claim 1, characterized in that the tail end sound-deadening structure (30) includes a tail end sound-deadening accommodating cylinder (31), in which a plurality of independent silencers (32) are installed in the tail end sound-deadening accommodating cylinder (31);
The independent muffler (32) comprises an independent muffler outer cylinder (320), a first silencing baffle (321), a middle silencing baffle (322) and a second silencing baffle (323) are sequentially fixed in the independent muffler outer cylinder (320) from top to bottom, a first silencing chamber (324) is formed between the first silencing baffle (321) and the middle silencing baffle (322), and a second silencing chamber (325) is formed between the second silencing baffle (323) and the inner bottom of the independent muffler outer cylinder (320);
The silencer comprises an independent silencer outer cylinder (320), wherein a silencing input pipe (326) communicated with a first silencing chamber (324) is fixed at the bottom of the independent silencer outer cylinder (320), the lower end of the silencing input pipe (326) is communicated with the inside of a middle silencing outer cylinder (21), a silencing output pipe (327) communicated with a second silencing chamber (325) is fixed at the top of the independent silencer outer cylinder (320), and the first silencing chamber (324) and the second silencing chamber (325) are communicated through an intermediate communicating pipe (328).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410495391.2A CN118309691B (en) | 2024-04-24 | 2024-04-24 | A variable ducted stainless steel silencer box for fan silencing |
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| CN202410495391.2A CN118309691B (en) | 2024-04-24 | 2024-04-24 | A variable ducted stainless steel silencer box for fan silencing |
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| CN118309691A CN118309691A (en) | 2024-07-09 |
| CN118309691B true CN118309691B (en) | 2025-02-14 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932084A (en) * | 2021-09-30 | 2022-01-14 | 浙江纳风净化技术有限公司 | Hole diameter adjusting type silencing pipe |
| CN116717905A (en) * | 2023-05-25 | 2023-09-08 | Tcl空调器(中山)有限公司 | Adjustable muffler and air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206830263U (en) * | 2017-03-22 | 2018-01-02 | 上海斯瑞佛汽车零部件有限公司 | A kind of muffler for motor |
| KR102572306B1 (en) * | 2021-04-02 | 2023-08-30 | (주)엔에스브이 | Silencer for gas vent stack incorporating multi-structure type diffusers |
| CN217632621U (en) * | 2022-08-30 | 2022-10-21 | 宁波丰沃增压科技股份有限公司 | Novel automobile exhaust muffler |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932084A (en) * | 2021-09-30 | 2022-01-14 | 浙江纳风净化技术有限公司 | Hole diameter adjusting type silencing pipe |
| CN116717905A (en) * | 2023-05-25 | 2023-09-08 | Tcl空调器(中山)有限公司 | Adjustable muffler and air conditioner |
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| CN118309691A (en) | 2024-07-09 |
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