CN2197497Y - Silencing box for centrifugal ventilator - Google Patents
Silencing box for centrifugal ventilator Download PDFInfo
- Publication number
- CN2197497Y CN2197497Y CN 94215842 CN94215842U CN2197497Y CN 2197497 Y CN2197497 Y CN 2197497Y CN 94215842 CN94215842 CN 94215842 CN 94215842 U CN94215842 U CN 94215842U CN 2197497 Y CN2197497 Y CN 2197497Y
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- China
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- noise
- air
- ventilator
- plate
- utility
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- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Duct Arrangements (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to a silencing box for a centrifugal ventilator, composed of a box body, an air inlet, an air outlet, and an inspection manhole. The utility model is characterized in that the air inlet of negative pressure is arranged in the air inlet. A micro-pore plate and a composite plate for noise elimination are arranged on the inner wall of the box body. A machine base damper is arranged below the machine base of the ventilator. The axial flow blower in an air outlet and an outlet muffler are arranged on the top of the box body. The utility model has the advantage of comprehensive control of the radiated noise of the machine body of the ventilator, air power noise and mechanical vibration noise. The silencing box for a centrifugal ventilator can meet the requirements of an industrial environment and an indoor noise standard. The silencing box for a centrifugal ventilator is suitable for noise elimination and isolation for ventilators, blowers, air induced machines and other dynamic machines which are arranged in various buildings.
Description
The utility model belongs to the noise elimination sound arrester of general power machine, the device that particularly utilizes sound-absorbing material, perforated plate and steel plate that centrifugal fan is eliminated the noise, insulated against sound.
At present, some power machines as motor, internal-combustion engine, ventilator, all produce noise at running, often need take noise elimination, sound insulation measure, with the protection environment, reduce the pollution of noise to environment.Existing sound insulation casing, be with bonnet in casing, establish sound-absorbing material, damping cavity and wedge absorber in cabinet wall, can reduce by 20～25 decibels of noises (A).Heat for machine itself produces then under the hot pressing function of hot air flow, outside noise elimination blinds in cover body top is discharged cover, forms natural ventilation and sound insulation in cover body.Its defening effect can reach 20 decibels, and machine is worked under 40 ℃ of situations, and its machine surface temperature rise≤3 ℃ have higher environmental protection effect.But, the poor effect of eliminating waste heat, cooling can not guarantee that still machine normally moves.
The purpose of this utility model is, the sound proof box cover is improved, the negative pressure intake grill of cooling motor is set, heat with the generation of dissipation motor, the compound muffler plate of small orifice plate is set,, the support vibration damper is set to improve the noise elimination effect of tank wall, reducing the solid-borne sound transmission of machine vibration, thereby improve sound absorption, the defening effect of acoustic hood greatly.
Centrifugal fan noise elimination sound proof box of the present utility model, form by casing, air intlet, air outlet slit, maintenance hand-hole, it is characterized in that, air intlet is established the negative pressure intake grill, cabinet wall is provided with the compound muffler plate of small orifice plate, the support vibration damper is set under the ventilator support, and the casing top is provided with air outlet slit axial-flow blower and outlet silencing apparatus;
The negative pressure intake grill is a bending shape pipeline section, tube wall is made up of the perforated plate of extra-fine glass-wool felt acoustic board and aperture φ 3～6mm, the compound muffler plate of small orifice plate that cabinet wall is provided with is made up of the perforated plate of extra-fine glass-wool felt and aperture φ 2～6mm, and the support vibration damper is to lay steelframe to form on four jiaos of shock-absorbing springs that are provided with.
The advantage that centrifugal fan noise elimination sound proof box of the present utility model has is, has the usefulness of body radiated noise, air power noise and the mechanical vibration noise of comprehensive regulation ventilator, can satisfy the requirement of industrial environment and room noise standard; Can rely on the cooling of negative pressure air inlet ventilation, eliminate the heat that motor gives out automatically; Be furnished with the vibration damping support of ventilator special use, further improve noise reduction; The static sound-insulation value of casing can reach 38～39 decibels; When the cooling air temperature that enters casing was no more than 35 ℃, the motor surfaces temperature was no more than 52～55 ℃.The noise elimination that is applicable to the ventilator that is installed in subsurface construction, open-air, workshop and the boiler room, blower, induced draught fan is insulated against sound and other power machine noise reductions.
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is the organigram of centrifugal fan noise elimination sound proof box
Fig. 2 is the A-A sectional drawing of Fig. 1
As seen from the figure, centrifugal fan noise elimination sound proof box of the present utility model, form by casing, air intlet, air outlet slit, maintenance hand-hole, it is characterized in that, air intlet is established negative pressure intake grill 2, casing 1 inwall is provided with the compound muffler plate of small orifice plate, and the support vibration damper is set under the support of power machine, and the casing top is provided with air outlet slit axial-flow blower 5 and outlet silencing apparatus 6;
The negative pressure intake grill is a bending shape pipeline section, tube wall is made up of the perforated plate of extra-fine glass-wool felt acoustic board and aperture φ 3～6mm, the compound muffler plate of small orifice plate that cabinet wall is provided with is made up of the perforated plate of extra-fine glass-wool felt and aperture φ 3～6mm, and the support vibration damper is to lay steelframe 9 to form on four jiaos of shock-absorbing springs 10 that are provided with.Among the figure, 7 is centrifugal fan, and 8 is motor, and 11 is sponge mat, and 12 for the import silencing apparatus, and 4 are flexible coupling for pipeline section.
Claims (1)
1, a kind of centrifugal fan noise elimination sound proof box, form by casing, air intlet, air outlet slit, maintenance hand-hole, it is characterized in that, air intlet is established the negative pressure intake grill, cabinet wall is provided with the compound muffler plate of small orifice plate, the support vibration damper is set under the ventilator support, and the casing top is provided with air outlet slit axial-flow blower and outlet silencing apparatus;
The negative pressure intake grill is a bending shape pipeline section, tube wall is made up of the perforated plate of extra-fine glass-wool felt acoustic board and aperture φ 3～6mm, the compound muffler plate of small orifice plate that cabinet wall is provided with is made up of the perforated plate of extra-fine glass-wool felt and aperture Φ 2～6mm, and the support vibration damper is to lay steelframe to form on four jiaos of shock-absorbing springs that are provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94215842 CN2197497Y (en) | 1994-07-01 | 1994-07-01 | Silencing box for centrifugal ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94215842 CN2197497Y (en) | 1994-07-01 | 1994-07-01 | Silencing box for centrifugal ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2197497Y true CN2197497Y (en) | 1995-05-17 |
Family
ID=33831718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94215842 Expired - Fee Related CN2197497Y (en) | 1994-07-01 | 1994-07-01 | Silencing box for centrifugal ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2197497Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221018A (en) * | 2011-06-30 | 2011-10-19 | 福耀玻璃工业集团股份有限公司 | Energy-saving sound-proofing centrifugal fan set |
| CN103807219A (en) * | 2012-11-02 | 2014-05-21 | 费希尔控制国际公司 | Valve cage having zero dead band between noise abatement and high capacity flow sections |
| CN104329294A (en) * | 2013-07-22 | 2015-02-04 | 张崇欣 | Fan sound insulation cover ventilation and sound absorption structure |
| CN104458283A (en) * | 2014-12-26 | 2015-03-25 | 长城汽车股份有限公司 | Airflow type cooling device and vehicle road simulating testing system |
-
1994
- 1994-07-01 CN CN 94215842 patent/CN2197497Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221018A (en) * | 2011-06-30 | 2011-10-19 | 福耀玻璃工业集团股份有限公司 | Energy-saving sound-proofing centrifugal fan set |
| CN102221018B (en) * | 2011-06-30 | 2013-06-12 | 福耀玻璃工业集团股份有限公司 | Energy-saving sound-proofing centrifugal fan set |
| CN103807219A (en) * | 2012-11-02 | 2014-05-21 | 费希尔控制国际公司 | Valve cage having zero dead band between noise abatement and high capacity flow sections |
| CN104329294A (en) * | 2013-07-22 | 2015-02-04 | 张崇欣 | Fan sound insulation cover ventilation and sound absorption structure |
| CN104458283A (en) * | 2014-12-26 | 2015-03-25 | 长城汽车股份有限公司 | Airflow type cooling device and vehicle road simulating testing system |
| CN104458283B (en) * | 2014-12-26 | 2017-05-03 | 长城汽车股份有限公司 | Airflow type cooling device and vehicle road simulating testing system |
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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 |