CN201891666U - Low-noise shell for high-pressure centrifugal fan - Google Patents
Low-noise shell for high-pressure centrifugal fan Download PDFInfo
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- CN201891666U CN201891666U CN201020275956XU CN201020275956U CN201891666U CN 201891666 U CN201891666 U CN 201891666U CN 201020275956X U CN201020275956X U CN 201020275956XU CN 201020275956 U CN201020275956 U CN 201020275956U CN 201891666 U CN201891666 U CN 201891666U
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- noise
- casing
- shell
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- centrifugal fan
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Abstract
The utility model relates to a high-pressure centrifugal fan, particularly to a low-noise structure for the high-pressure centrifugal fan. A low-noise shell for high-pressure centrifugal fan comprises a noise-lowering shell arranged on the exterior of the fan shell, namely a cavity formed by an outside plate and an outside worm plate is arranged on the original fan shell and the cavity is filled with sound-absorbing materials. Through the low-noise shell for high-pressure centrifugal fan, the noise spreading from the fan shell to outside is efficiently reduced and the cost is lowered.
Description
Technical field
The utility model relates to centrifugal high pressure fan, relates in particular to a kind of low-noise structural of centrifugal high pressure fan.
Background technique
Centrifugal high pressure fan noise height (more than the 100db (A), up to 130db (A)), harm is big.
The way that reduces noise has two classes:
1. improve the design of blower fan runner, improve air distribution, reduce the blower fan aerodynamic noise from the source, but effect is very limited;
2. additional silencing equipment is adopted in noise abatement, reduces the blower fan aerodynamic noise to environmental dissemination.
The noise abatement method comprises:
1. on blower fan import and export pipeline, fix a silencer, reduce noise and pass through pipe transmmision;
2. adopt the outsourcing muffler material, reduce fan noise and propagate to the external world by casing;
3. the king-sized blower fan of noise is adopted independent machine room, make it to isolate with environment.
There is following point in above-mentioned noise abatement method:
1. blower fan is imported and exported on the pipeline and is fixed a silencer, and can not reduce noise and outwards be propagated by casing;
2. the outsourcing muffler material needs disposable input, and blower fan overhauls, often need outsourcing muffler material again when changing, and produces new expense;
3. independent machine room exists and takes up an area of greatly, invests big problem.And equipment management personnel must regularly enter the height machine room of making an uproar blower fan is checked, safeguarded.
Summary of the invention
The utility model is intended to address the above problem, and a kind of low noise casing of centrifugal high pressure fan is provided.The utility model can effectively reduce noise, and cost is low.
The utility model is achieved in that
The low noise casing of a kind of centrifugal high pressure fan described in the utility model.
The utility model adds outer panel and outer snail plate on former fan casing (side inner panel and interior snail plate form) basis, form double-deck casing, middle filling muffler material, and muffler material can reduce noise and be propagated to the external world by casing.Packed layer thickness b＜100mm exerts an influence hardly to requirements of installation space.The utility model effectively reduces noise to be propagated to the external world by casing, improves the working environment of blower fan periphery.
The filling thickness of described muffler material is less than 100mm.
Description of drawings
Fig. 1 is a low noise casing schematic representation;
Fig. 2 is the side view of Fig. 1.
Embodiment
As shown in Figure 1: a kind of low noise casing of pressing centrifugal blower, side inner panel 1 constitutes former blower fan runner with interior snail plate 3, guarantees that the blower fan aeroperformance is constant.
From Fig. 2 as seen, form cavity between outer panel 2 and side inner panel 1, outer snail plate 4 and the interior snail plate 3, filling sucting sound material 5 in the cavity.Sound-absorbing material 5 adopts polyurethane, and (density is little: ≈ 30kg/m
3, acoustic absorptivity is big: ≈ 0.5), directly foaming behind the employing casing welding fabrication forms, and sound-absorbing material 1 is combined firmly with inside and outside snail plate 3,4, is evenly distributed.
By the sound absorption of sound-absorbing material 5, effectively noise reduction sound is propagated to the external world by casing.
Claims (2)
1. the low noise casing of a centrifugal high pressure fan, it is characterized in that it also comprises a noise reduction casing that is arranged on the casing appearance, promptly on the casing basis of reason side inner panel and interior snail plate composition, add outer panel and outer snail plate, constitute a cavity, be filled with sound-absorbing material in the cavity.
2. the low noise casing of a kind of centrifugal high pressure fan according to claim 1 is characterized in that, the filling thickness of described muffler material is less than 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020275956XU CN201891666U (en) | 2010-07-29 | 2010-07-29 | Low-noise shell for high-pressure centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020275956XU CN201891666U (en) | 2010-07-29 | 2010-07-29 | Low-noise shell for high-pressure centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201891666U true CN201891666U (en) | 2011-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020275956XU Expired - Fee Related CN201891666U (en) | 2010-07-29 | 2010-07-29 | Low-noise shell for high-pressure centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201891666U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032381A (en) * | 2013-01-05 | 2013-04-10 | 华北电力大学（保定） | Enclosure for reducing noise of axial flow fan |
| CN103032379A (en) * | 2013-01-05 | 2013-04-10 | 华北电力大学（保定） | Low-noise centrifugal ventilator casing |
| CN103089713A (en) * | 2011-11-07 | 2013-05-08 | 中国科学院声学研究所 | Low noise centrifugal pump |
| CN103835997A (en) * | 2014-03-06 | 2014-06-04 | 珠海格力电器股份有限公司 | Air conditioner indoor unit and volute thereof |
| CN106016406A (en) * | 2016-07-14 | 2016-10-12 | 广东美的厨房电器制造有限公司 | Volute assembly and exhaust hood |
| CN114554327A (en) * | 2022-01-25 | 2022-05-27 | 上海感与执技术有限公司 | Bone voiceprint sensor and electronic equipment |
-
2010
- 2010-07-29 CN CN201020275956XU patent/CN201891666U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089713A (en) * | 2011-11-07 | 2013-05-08 | 中国科学院声学研究所 | Low noise centrifugal pump |
| CN103032381A (en) * | 2013-01-05 | 2013-04-10 | 华北电力大学（保定） | Enclosure for reducing noise of axial flow fan |
| CN103032379A (en) * | 2013-01-05 | 2013-04-10 | 华北电力大学（保定） | Low-noise centrifugal ventilator casing |
| CN103032379B (en) * | 2013-01-05 | 2015-05-13 | 华北电力大学（保定） | Low-noise centrifugal ventilator casing |
| CN103032381B (en) * | 2013-01-05 | 2015-09-02 | 华北电力大学（保定） | For reducing the casing of noise of axial flow fan |
| CN103835997A (en) * | 2014-03-06 | 2014-06-04 | 珠海格力电器股份有限公司 | Air conditioner indoor unit and volute thereof |
| CN103835997B (en) * | 2014-03-06 | 2017-05-03 | 珠海格力电器股份有限公司 | Air conditioner indoor unit and volute thereof |
| CN106016406A (en) * | 2016-07-14 | 2016-10-12 | 广东美的厨房电器制造有限公司 | Volute assembly and exhaust hood |
| CN114554327A (en) * | 2022-01-25 | 2022-05-27 | 上海感与执技术有限公司 | Bone voiceprint sensor and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20160729 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |