CN85107811A - Improve the new structure of centrifugal fun for inner efficiency - Google Patents
Improve the new structure of centrifugal fun for inner efficiency Download PDFInfo
- Publication number
- CN85107811A CN85107811A CN85107811.7A CN85107811A CN85107811A CN 85107811 A CN85107811 A CN 85107811A CN 85107811 A CN85107811 A CN 85107811A CN 85107811 A CN85107811 A CN 85107811A
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- China
- Prior art keywords
- blade
- impeller
- centrifugal fan
- gradually
- suction surface
- 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.)
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Abstract
The present invention provides a kind of new structure that can improve (or increasing substantially) internal efficiency to centrifugal fan.The feature of this structure is:
1. to the centrifugal fan of having finalized the design be: along near certain the some beginning blade middle part, behind blade suction surface gradually in the bulged blading, widen the axial width (effect be keep former optimal working point constant) of impeller to the impeller outlet end gradually in the correspondent section of blade thickening.
2. to newly-designed centrifugal fan be: along blade any point beginning, to impeller outlet end bulged blading gradually behind blade suction surface.
Description
The present invention relates to improve a kind of new structure of centrifugal fan (being centrifugal fan, blower, compressor) internal efficiency.
The present invention is based on following principle and makes: when the impeller high speed rotating, to produce strong vacuum phenomenon behind the blade suction surface, thereby cause air mass constantly to expand, consequently make the useful pressure of the former acquisition of air mass can become useless heat energy and acoustic energy to suction surface.Because air-flow enters casing from impeller channel, is to enter inertia system from noninertial system, so the vacuum phenomenon behind the suction surface is strong especially near the air mass influence the impeller outlet part.Along blade point beginning to impeller outlet direction bulged blading gradually behind blade suction surface, its effect is relatively to have reduced the breathing space, thereby causes internal efficiency to improve and the noise reduction.
Implement the present invention and can be divided into two kinds of situations:
1. the centrifugal fan to having finalized the design: implement to keep former blower fan optimal working point constant behind the new structure of the present invention for making, implementation methods is: along near certain the some beginning blade middle part, behind blade suction surface gradually in the bulged blading, the axial width of widening impeller in the correspondent section of blade thickening gradually (has the rotary diffusing device to the impeller outlet end.Extend to the wheel cap outer rim with same curvature always), both are offseted, purpose is to make the impeller channel cross section keep former Changing Pattern, thus it is constant to reach former optimal working point.
2. to newly-designed centrifugal fan: can be along blade any point beginning, to impeller outlet end bulged blading gradually behind blade suction surface.This has special significance to increasing substantially small flow high-head centrifugal fun for inner efficiency.
The concrete structure of invention is provided by following examples and accompanying drawing.
Fig. 1 is the new structure that proposes according to invention, is implemented in the schematic representation on the energy-conserving product 9-26 type 5# centrifugal fan impeller.
Fig. 2 is the 5# centrifugal fan property comparison behind the former 9-26 type 5# centrifugal fan and the new structure that proposes that carries out an invention.
Claims (2)
1, improves the new structure of centrifugal fan (being centrifugal fan, blower, compressor) internal efficiency.This structure is characterised in that:
(1) along blade any point beginning, to impeller outlet end bulged blading gradually behind blade suction surface.
(2) thickening after blade can be solid also can be hollow (promptly forming the cavity of a closure).
2, according to the described structure of claim 1.To on the centrifugal fan that is used for finalizing the design and if make its former optimal working point constant and when reducing noise, the feature of its structure is:
(1) along near certain the some beginning blade middle part, to impeller outlet end bulged blading gradually behind blade suction surface.
(2) widen impeller De Shaft gradually to width in the correspondent section of blade thickening.
(3) thickening that makes blade and Ye Lun Shaft to width widen that both are mutually low, make the impeller channel cross section keep former Changing Pattern.
(4) for there being rotation to expand the impeller of device, should changing identical curvature to width widen by Ye Lun Shaft and extend to the wheel cap outer rim always.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107811 CN1017741B (en) | 1985-10-19 | 1985-10-19 | New structure of centrifugal fun for inner efficiency increasing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107811 CN1017741B (en) | 1985-10-19 | 1985-10-19 | New structure of centrifugal fun for inner efficiency increasing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107811A true CN85107811A (en) | 1986-07-02 |
| CN1017741B CN1017741B (en) | 1992-08-05 |
Family
ID=4795791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85107811 Expired CN1017741B (en) | 1985-10-19 | 1985-10-19 | New structure of centrifugal fun for inner efficiency increasing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1017741B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460691C (en) * | 2007-04-04 | 2009-02-11 | 林钧浩 | Pressurized centrifugal rear axial-flown fan impeller |
| CN102242723A (en) * | 2010-05-12 | 2011-11-16 | 松下电器产业株式会社 | Electric blower and electric dust collector using the electric blower |
| CN106704258A (en) * | 2016-09-12 | 2017-05-24 | 东莞市卓奇电子科技有限公司 | Centrifugal impeller guide vane and centrifugal impeller |
| CN107131149A (en) * | 2017-07-14 | 2017-09-05 | 成军 | Impeller |
-
1985
- 1985-10-19 CN CN 85107811 patent/CN1017741B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460691C (en) * | 2007-04-04 | 2009-02-11 | 林钧浩 | Pressurized centrifugal rear axial-flown fan impeller |
| CN102242723A (en) * | 2010-05-12 | 2011-11-16 | 松下电器产业株式会社 | Electric blower and electric dust collector using the electric blower |
| CN106704258A (en) * | 2016-09-12 | 2017-05-24 | 东莞市卓奇电子科技有限公司 | Centrifugal impeller guide vane and centrifugal impeller |
| CN107131149A (en) * | 2017-07-14 | 2017-09-05 | 成军 | Impeller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1017741B (en) | 1992-08-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |