CN2567385Y - Pressure return type intake noise silencer - Google Patents
Pressure return type intake noise silencer Download PDFInfo
- Publication number
- CN2567385Y CN2567385Y CN 02252916 CN02252916U CN2567385Y CN 2567385 Y CN2567385 Y CN 2567385Y CN 02252916 CN02252916 CN 02252916 CN 02252916 U CN02252916 U CN 02252916U CN 2567385 Y CN2567385 Y CN 2567385Y
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- convergent
- silencing apparatus
- sound
- pressure
- perforated plate
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Abstract
The utility model relates to a silencer with a pressure recovery function, which is used for an inlet place of an axial flow fan. The structure of the utility model is a square cylindrical metal casing, the inner part of which is lined with a perforated plate used as a conic protection plate, sound absorbing material is arranged between two sandwich layers, and the metal casing is formed; a convergence body with a rectifying device uses a perforated plate as a conic protection plate, and the inner cavity is placed with the sound absorbing material. The metal casing and the convergence body have the same coaxial line, are welded and supported by shape steel and slab steel, and are connected into a whole by screw bolts, a gradually convergent reasonable airflow channel is formed between the metal casing and the convergence body, static pressure can be effectively converted to dynamic pressure, and the superpower pressure recovery function can be provided. The inlet end of the axial flow fan is directly provided with the utility model, the function of reducing noise and smoothing air flow can be provided under the situation that no snap pressure drop exists, and the resistance loss of the gas is reduced to the minimized value, the effective pressure of the fan can be effectively improved, the energy consumption can be reduced, the energy can be saved, and the engineering cost can be reduced.
Description
Technical field
The utility model belongs to the silencing apparatus that noise is controlled, and particularly relates to a kind of silencing apparatus that axial-flow blower inlet has the pressure recovery function that is used for.
Background technique
At present, domestic known silencing apparatus commonly used generally is resistive, resistance and resistance composite muffler, adopts slice structure more.
Silencing apparatus commonly used is because of the differences such as characteristic, air quantity and wind speed of its structure, noise source, and the performance difference of its silencing apparatus is very big.The sound deadening capacity of most of silencing apparatuss is between 10～30dB (A), and its pressure loss as requires bigger sound deadening capacity between 10～500Pa, and then the pressure loss is wanted corresponding increase, thereby it is a lot of that the fan energy consumption loss is increased, and has reduced the working efficiency of ventilator.
For the air blast noise that reduces axial-flow blower and mechanical noise to the influence of silencing apparatus commonly used, often add the intermediate connection tube road between silencing apparatus and the blower fan, this has just increased the shared space of ventilation system, has also increased the engineering work load of equipment cost and whole project.
Summary of the invention
The utility model provides a kind of flange plate and axial-flow blower intake grill place of using directly to connect for solving the technical problem that exists in the known technology, and has the import silencing apparatus of pressure recovery function.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
A kind of pressure return type import silencing apparatus, it mainly is made up of square shell, perforated plate backplate, sound-absorbing material, convergent body, flange plate, angle-steel, rectangular slab, bolt, nuts and washers, a square tube shape shell that is bent into by a sheet metal and a conical internal protective plate that intake grill is big, air-out is young that surrounds by perforated plate, and in the cavity that between square shell and conical internal protective plate, constitutes, filling sucting sound material is formed a metal shell body; A conical outer casing convergence tube that surrounds by perforated plate that inlet end is big, the outlet side is little is housed in the inner chamber of metal shell body, and filling sucting sound material in the inner chamber of convergence tube is formed a convergent body; The convergence tube also is equipped with rectifying device smooth, that its cross section enlarges gradually along airflow direction at inlet end, and rectifying device and convergent body are to constitute one by opposite taper shape; Metal shell body and convergent body are between the two respectively with the conical internal protective plate of 4 uniform weld metal framies of angle-steel and the conical outer casing of convergent body, on every angle-steel, weld simultaneously a block length bar slab, the rectangular slab of both correspondences is used bolt, nuts and washers again, metal shell body and convergent body are connected into an integral body, and make it constitute taper shape convergent air-flow path gradually between the two; Flange plate is equipped with in the outlet side of this import silencing apparatus, and flange plate can be with the blind flange at the direct coupking shaft flow fan of bolt intake grill place.
The utility model can also adopt following technical measures:
Described perforated plate backplate also can adopt the microperforated panel backplate.
Described sheet metal and sound-absorbing material also can be selected the sheet metal and the sound-absorbing material of different cultivars.
Described conical convergent body also can be made convergent body oval taper, square taper or hemispherical dome shape.
Advantage and the good effect that the utlity model has are: an ozzle and the reasonable air-flow path of this convergent gradually that design is correct, can convert static pressure to dynamic pressure effectively, and have extremely strong pressure recovery function.Entrance point at axial-flow blower is directly installed this silencing apparatus, can not have under the situation that pressure reduces rapidly, reach the effect that reduces the peaceful stream of getting a breathing space of noise, make the sound deadening capacity of equipment integral big, the drag losses of gas is reduced to minimum, also improved the effective pressure of blower fan, saved the energy, raised the efficiency.Sound deadening capacity is at 15～50dB (A), and drag losses is between 10～120Pa; Reasonably channels designs makes the air-flow regenerated noise reduce to minimum; The compact structure design has reduced taking up room of silencing apparatus, saves engineering cost; The selection of many kinds metallic material and sound-absorbing material can be satisfied requirements such as in light weight, anticorrosion, antirust, the protection against the tide of silencing apparatus and fire prevention, also can play good noise elimination effect to the noise of each octave; This silencing apparatus connects mutually with the inlet end of the direct coaxial flow blower fan of flange plate, thereby has significantly reduced the shared space of whole ventilation system.Be installation and the transportation that makes things convenient for silencing apparatus, also it can be divided into several modules beggar piece, at the construction field (site) it is carried out the cordwood assembling.The complete passive silencer of this not mobile part need not any maintaining, long service life.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the I portion enlarged diagram of Fig. 2;
Fig. 4 is the II portion enlarged diagram of Fig. 2.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the conical internal protective plate 5 that square tube shape shell 2, sound-absorbing material 3, the perforated plate that the metal shell body is bent into by sheet metal surrounds is formed; Conical outer casing convergence tube 7, sound-absorbing material 6 that convergent body is made by perforated plate are formed; The rectifying device of convergent body and inlet end constitutes one.Connecting plate 4, bolt 9, nut 10 and pad 11 that metal shell body and convergent body are formed by angle-steel and rectangular slab fuse, and form rational air-flow path 8.The outlet side links to each other with the blind flange at axial-flow blower intake grill place by flange plate 1, and air-flow is finished the process of pressure conversion and reduction noise through convergent air-flow path 8 gradually.Wherein convergent body both can do coning, oval taper, also can the side's of making taper or hemispherical dome shape, the sidewall internal protective plate 5 of air-flow path 8 and outer casing 7 are perforated plate, fill alternative sound-absorbing material 3,6 in the cavity in metal shell body and the convergent body, the import silencing apparatus that is made of them is finished the function of sqouynd absorption lowering noise.According to the needs of system, perforated plate can be substituted by microperforated panel.According to the requirement of different noise elimination noise reductions, perforated plate sheet metal and sound-absorbing material can be selected the material of different cultivars for use.Metal shell body and convergent body can convert static pressure to dynamic pressure effectively by the reasonable air-flow path 8 of the convergent gradually that connecting plate constituted.Entrance point at axial-flow blower is directly installed this silencing apparatus, can reach the effect that reduces the peaceful stream of getting a breathing space of noise, also can improve the effective pressure of blower fan, reduces the shared space of ventilation system, saves the energy, raises the efficiency.
Claims (4)
1. pressure return type import silencing apparatus, it mainly is made up of square shell, perforated plate backplate, sound-absorbing material, convergent body, flange plate, angle-steel, rectangular slab, bolt, nuts and washers, it is characterized in that: a square tube shape shell (2) that is bent into by a sheet metal and a conical internal protective plate (5) that intake grill is big, air-out is young that surrounds by perforated plate, and in the cavity that between square shell and conical internal protective plate, constitutes, filling sucting sound material (3) is formed a metal shell body; A conical outer casing convergence tube (7) that surrounds by perforated plate that inlet end is big, the outlet side is little is housed in the inner chamber of metal shell body, and filling sucting sound material (6) in the inner chamber of convergence tube is formed a convergent body; The convergence tube also is equipped with rectifying device smooth, that its cross section enlarges gradually along airflow direction at inlet end, and rectifying device and convergent body are to constitute one by opposite taper shape; Metal shell body and convergent body are between the two respectively with the conical internal protective plate of 4 uniform weld metal framies of angle-steel and the conical outer casing of convergent body, on every angle-steel, weld simultaneously a block length bar slab, the rectangular slab of both correspondences is used bolt, nuts and washers again, metal shell body and convergent body are connected into an integral body, and make it constitute taper shape convergent air-flow path (8) gradually between the two; Flange plate (1) is equipped with in the outlet side of this import silencing apparatus, and flange plate can be with the blind flange at the direct coupking shaft flow fan of bolt intake grill place.
2. pressure return type import silencing apparatus according to claim 1, it is characterized in that: described perforated plate backplate also can adopt the microperforated panel backplate.
3. pressure return type import silencing apparatus according to claim 1, it is characterized in that: described sheet metal and sound-absorbing material also can be selected the sheet metal and the sound-absorbing material of different cultivars.
4. pressure return type import silencing apparatus according to claim 1 is characterized in that: described conical convergent body, also can make convergent body oval taper, square taper or hemispherical dome shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252916 CN2567385Y (en) | 2002-08-30 | 2002-08-30 | Pressure return type intake noise silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252916 CN2567385Y (en) | 2002-08-30 | 2002-08-30 | Pressure return type intake noise silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2567385Y true CN2567385Y (en) | 2003-08-20 |
Family
ID=33722227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02252916 Expired - Fee Related CN2567385Y (en) | 2002-08-30 | 2002-08-30 | Pressure return type intake noise silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2567385Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889138A (en) * | 2016-06-15 | 2016-08-24 | 江苏鑫丰塑业有限公司 | Honeycomb dehumidification silencer |
| CN107435664A (en) * | 2016-05-27 | 2017-12-05 | 中国科学院声学研究所 | A kind of axial cooling fan silencer |
| CN113007143A (en) * | 2021-03-26 | 2021-06-22 | 平安开诚智能安全装备有限责任公司 | Ultra-low noise silencer for air inlet end of fan |
| WO2022001831A1 (en) * | 2020-06-29 | 2022-01-06 | 中兴通讯股份有限公司 | Silencing unit, and honeycomb muffler |
-
2002
- 2002-08-30 CN CN 02252916 patent/CN2567385Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435664A (en) * | 2016-05-27 | 2017-12-05 | 中国科学院声学研究所 | A kind of axial cooling fan silencer |
| CN105889138A (en) * | 2016-06-15 | 2016-08-24 | 江苏鑫丰塑业有限公司 | Honeycomb dehumidification silencer |
| WO2022001831A1 (en) * | 2020-06-29 | 2022-01-06 | 中兴通讯股份有限公司 | Silencing unit, and honeycomb muffler |
| CN113936630A (en) * | 2020-06-29 | 2022-01-14 | 中兴通讯股份有限公司 | Noise elimination unit and honeycomb type noise eliminator |
| CN113007143A (en) * | 2021-03-26 | 2021-06-22 | 平安开诚智能安全装备有限责任公司 | Ultra-low noise silencer for air inlet end of fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |