CN2555434Y - High frequency noise reducer - Google Patents
High frequency noise reducer Download PDFInfo
- Publication number
- CN2555434Y CN2555434Y CN 02263403 CN02263403U CN2555434Y CN 2555434 Y CN2555434 Y CN 2555434Y CN 02263403 CN02263403 CN 02263403 CN 02263403 U CN02263403 U CN 02263403U CN 2555434 Y CN2555434 Y CN 2555434Y
- Authority
- CN
- China
- Prior art keywords
- frequency noise
- high frequency
- utility
- model
- air pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a high frequency noise reducer which is installed on inlets and outlets of various air pumps and can decrease or eliminate the noise produced by the air pumps in operation. A circular tube provided with side holes is provided with a concave spherical face cover, the concave surface of the concave spherical face cover is stuck with soft sound-absorbing material. The utility model has simple, compact and reasonable structure. When the high frequency noise reducer is arranged on the inlets and the outlets of various air pumps, the high frequency noise reducer can decrease the high frequency noise making use of the principle that the reflecting sound wave of the concave spherical face cover and the sound wave produced in the air pump cancel each other. Simultaneously, the soft material is adopted to achieve the function of auxiliary noise elimination so as to cause the air pump in operation not to produce high-frequency noise to pollute environment.
Description
Technical field:
The utility model relates to a kind of reduction high frequency noise device, is used to be installed in all kinds of air pump inlet/outlet, can reduce until eliminating the high frequency noise that air pump is in operation and is produced.
Technical background:
Before the utility model was made, all kinds of air pumps were when work, because the impeller rotation, the gas between its blade passage is thrown toward impeller outer edge from the impeller center under action of centrifugal force, leave impeller with higher speed and move along casing, discharges through exhaust outlet.Produce ear-piercing howling in this process and be high-frequency noise.Space around this noise passes to by air pump inlet/outlet and pipeline, befouling environment.
Technology contents:
The purpose of this utility model is to overcome above-mentioned deficiency, thereby provides a kind of simple in structure, compact, reasonable; It utilizes the reflecting action of spill sphere lid and the sound absorption of soft material can effectively reduce until eliminating the high frequency noise that air pump is in operation and is produced.
Main solution of the present utility model is achieved in that
It mainly adopts spill sphere lid 2 is housed on the pipe 1 that has side opening, covers 2 concave surfaces at the spill sphere and posts soft sound absorbing material 3.
Description of drawings:
Fig. 1 is the utility model structural representation;
Fig. 1 is the utility model structure A-A sectional view;
Embodiment:
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model mainly adopts the pipe 1, spill sphere lid 2, the soft sound absorbing material 3 that have side opening to form.The pipe 1 and the spill sphere lid 2 that have side opening adopt metal or plastics to make.Spill sphere lid 2 (also can be integral) are housed on the circular pipe 1 that has side opening.Have air-out groove on the circular pipe 1, to guarantee the reaching desired flow of air pump itself, the air-out groove shape can be made rectangle or circular hole.The air-out groove height can be 3-8mm.As make circular hole, its Circularhole diameter also is 3-8mm.The spherical radius R of spill sphere lid 2 is 0.65～1.5 times of pipe 1 external diameter.Cover 2 concave surfaces at the spill sphere and can serve as a contrast subsides soft material 3, soft material 3 can be that soft sound absorbing materials such as plastics, rubber, leather, papery, fiber or colloid are used for assisting noise reduction.
Working principle of the present utility model:
When high frequency sound wave propagated into denoising device by the air pump import and export, sound wave ran into spill sphere lid 2 and reflects, and the sound wave that sound wave that reflects and air pump inside spread out of meets, and cancelled out each other owing to two kinds of sound wave phase places are different, reduced noise.The size of selection device can make cancelling out each other of sound wave or most of the counteracting rightly, reaches the effect that abates the noise.When sound wave during in the spill spheric reflection, soft material can cause the bigger phase difference of reflected wave, can reduce plant bulk, improves the usefulness of device in addition.And a part of acoustic energy will be used to overcome frictional resistance that soft material brings and viscous force and become heat energy, also play the noise elimination effect.
The utlity model has following You point:
The utility model is simple in structure, compact, reasonable; Be installed in all kinds of air pump import and exports place, can be sharp The reflective sound wave of Yong spill sphere lid is Yu the Yuan reason that the inner sound wave that produces of air pump is cancelled out each other reduces high frequency The Zao sound; Adopt simultaneously soft material can play auxiliary noise elimination and be used as, thereby can not when making air pump Zai work Produce high-frequency noise and contaminated environment.
Claims (4)
1, a kind of reduction high frequency noise device is characterized in that adopting having spill sphere lid (2) is housed on the pipe of side opening (1).
2, a kind of reduction high frequency noise device according to claim 1 is characterized in that described spill sphere lid (2) concave surface posts soft sound absorbing material (3).
3, a kind of reduction high frequency noise device according to claim 1 is characterized in that having air-out groove on the described pipe (1).
4, a kind of reduction high frequency noise device according to claim 1 and 2, what it is characterized in that described air-out groove is shaped as rectangle or circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02263403 CN2555434Y (en) | 2002-07-25 | 2002-07-25 | High frequency noise reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02263403 CN2555434Y (en) | 2002-07-25 | 2002-07-25 | High frequency noise reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2555434Y true CN2555434Y (en) | 2003-06-11 |
Family
ID=33729800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02263403 Expired - Fee Related CN2555434Y (en) | 2002-07-25 | 2002-07-25 | High frequency noise reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2555434Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410794A (en) * | 2013-08-13 | 2013-11-27 | 江苏大学 | Wavelength adjustable noise reduction tube of centrifugal pump |
-
2002
- 2002-07-25 CN CN 02263403 patent/CN2555434Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410794A (en) * | 2013-08-13 | 2013-11-27 | 江苏大学 | Wavelength adjustable noise reduction tube of centrifugal pump |
| CN103410794B (en) * | 2013-08-13 | 2015-10-28 | 江苏大学 | A kind of wavelength adjustable noise reduction tube of centrifugal pump |
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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 |