CN103062125B - A kind of centrifugal blower - Google Patents
A kind of centrifugal blower Download PDFInfo
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- CN103062125B CN103062125B CN201310053632.XA CN201310053632A CN103062125B CN 103062125 B CN103062125 B CN 103062125B CN 201310053632 A CN201310053632 A CN 201310053632A CN 103062125 B CN103062125 B CN 103062125B
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- air
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- intaker
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- casing
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Abstract
The object of the invention is to propose a kind ofly the high pressure draught because of casing can be avoided to fling in impeller channel through air-intaker produces turbulent centrifugal blower, to improve the efficiency of this centrifugal blower.Centrifugal blower of the present invention is made up of casing, impeller, drive part, casing is provided with air-intaker in air inlet, the rear end of air-intaker stretches in impeller by the import department of impeller, and between air-intaker rear end and enclosing cover for impeller, there is safety clearance, thus forming a leakage air intake passage, the direction of revealing air intake passage is by the export department of the import department of impeller towards impeller.Be released into the air-flow in impeller channel by leakage air intake passage in casing, by revealing the guiding of air intake passage, make this leakage air-flow consistent with impeller charge air flow direction, air-flow is turned to and has been imported in main air flow, eliminate to reveal and fling the turbulent flow that causes into impeller channel to the considerable influence of blade air inlet, improve the flow efficiency of impeller, also improve the efficiency of blower fan simultaneously, reach energy-conservation effect.
Description
Technical field
The invention belongs to fluid machinery class field, be related specifically to a kind of centrifugal blower.
Background technique
Centrifugal blower is the equipment of conveying gas medium, be widely used in all trades and professions such as mine, environmental protection, cement building material, be also the power consumption king during Chinese national economy is produced, annual wastes power reaches more than 400 hundred million degree, so the raising of the efficiency of blower fan is significant, energy-saving potential is huge simultaneously.
As shown in Figure 1 (in figure, arrow represents gas flow), centrifugal blower main frame is generally made up of casing 1, impeller 2, drive part 3, and casing 1 is provided with air-intaker 4 in air inlet, for collecting air-flow; Air-intaker 4 extends to impeller 2 inlet, plays the effect of the medium separated between casing 1 and impeller 2, avoids the air-flow of the high pressure of casing 1 to flow into impeller 2 import, causes internal leakage to lose.But owing to being in the state relatively rotated between impeller 2 and casing 1, therefore can not seal completely between casing 1 and impeller 2, the high pressure draught of the casing 1 of small part is bled into impeller 2 in the circular gap of the outlet end of enclosing cover for impeller 7 and air-intaker 4, the air-flow of high pressure sprays in the runner of impeller 2, larger interference is produced with the main flow medium from air-intaker 4, produce turbulent flow at the vane inlet place of impeller 2, finally cause local stoppages, the mechanical efficiency of blower fan is declined.
Summary of the invention
The object of the invention is to propose a kind ofly the high pressure draught because of casing can be avoided to fling in impeller channel through air-intaker produces turbulent centrifugal blower, to improve the efficiency of this centrifugal blower.
Centrifugal blower of the present invention is made up of casing, impeller, drive part, described casing is provided with air-intaker in air inlet, key is that the rear end of described air-intaker stretches in impeller by the import department of impeller, and between air-intaker rear end and enclosing cover for impeller, there is safety clearance, thus forming a leakage air intake passage, the direction of described leakage air intake passage is by the export department of the import department of impeller towards impeller.
Be released into the air-flow in impeller channel by leakage air intake passage in casing, by revealing the guiding of air intake passage, this leakage air-flow is diverted to consistent with impeller charge air flow direction, air-flow is turned to and has been imported in main air flow, eliminate the considerable influence of turbulent flow to blade air inlet, eliminate partial occlusion, improve the flow efficiency of impeller, also improve the efficiency of blower fan simultaneously, reach energy-conservation effect.
Further, for ease of installing, described air-intaker is formed by connecting by external air inlet device and interior air-intaker, and front end and the casing of described external air inlet device are fixed, and rear end is connected with interior air-intaker, and the rear end of described interior air-intaker stretches in impeller.First interior air-intaker is in place during installation, then external air inlet device is connected with interior air-intaker, finally external air inlet device is fixed.
Further, the outer wall of described interior air-intaker is provided with circular projection in the position in corresponding impeller inlet portion.This circular projection can seal as the first of the Leakage Gas to impeller that prevent casing, and the safety clearance of interior air-intaker and enclosing cover for impeller seals as second, by two seals, the gas leaked in impeller is reduced to minimum, thus decrease the impact of gas leakage on main flow medium in impeller.
For improving the degree of convenience of installation further, described interior air-intaker is Split type structure, is formed by connecting by several point of body component, when mounted, mutually connect with bolt after body component will be divided to put into impeller inlet respectively, air-intaker in being formed, interior air-intaker is connected with external air inlet device bolt.
Centrifugal blower of the present invention, by improving the structure of air-intaker, makes the airflow direction that is leaked in impeller from casing consistent with the flow direction of impeller main flow medium, avoids generation turbulent, thus improve the efficiency of centrifugal blower.
Accompanying drawing explanation
Fig. 1 is the structural representation of the blower fan of prior art.
Fig. 2 is the structural representation of the blower fan of embodiment 1.
Fig. 3 is the air flow direction schematic diagram of embodiment 1.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect and working principle etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As Fig. 2, shown in 3 (in figure, arrow represents gas flow), the centrifugal blower of the present embodiment is by casing 1, impeller 2, drive part 3 forms, described casing 1 is provided with air-intaker in air inlet, key is that described air-intaker is formed by connecting by external air inlet device 4 and interior air-intaker 5, front end and the casing 1 of external air inlet device 4 are fixed, rear end is connected by bolt 6 with interior air-intaker 5, the rear end of interior air-intaker 5 stretches in impeller by the import department of impeller 2, and between interior air-intaker 5 rear end and enclosing cover for impeller 7, there is safety clearance, thus form a leakage air intake passage 8, the direction of described leakage air intake passage 8 is by the export department of the import department of impeller 2 towards impeller 2.
The outer wall of interior air-intaker 5 is provided with circular projection 9 in the position of corresponding impeller 2 import department.This circular projection 9 can seal as the first preventing the Leakage Gas of casing 1 to impeller 2, and interior air-intaker 5 and the safety clearance of enclosing cover for impeller 7 seal as second, by two seals, the gas leaked in impeller 2 is reduced to minimum, thus decrease the impact of gas leakage on main flow medium in impeller 2.
Be released into the air-flow in impeller channel by leakage air intake passage 8 in casing 1, by revealing the guiding of air intake passage 8, make this leakage air-flow consistent with the charge air flow direction of impeller 2, air-flow is turned to and has been imported in main air flow, eliminate the considerable influence of turbulent flow to blade air inlet, eliminate partial occlusion, improve the flow efficiency of impeller, also improve the efficiency of blower fan simultaneously, reach energy-conservation effect.
For improving the degree of convenience of installation further, interior air-intaker 5 is Split type structure, be formed by connecting by several point of body component, each point of body component is provided with engaging lug 10 in same position, when mounted, body component first will be divided to put into impeller 2 import respectively, and mutually with bolt, engaging lug 10 be connected, air-intaker 5 in being formed, interior air-intaker 5 is connected with external air inlet device 4 bolt 6.
Claims (4)
1. a centrifugal blower, be made up of casing, impeller, drive part, described casing is provided with air-intaker in air inlet, it is characterized in that the rear end of described air-intaker stretches in impeller by the import department of impeller, and between air-intaker rear end and enclosing cover for impeller, there is safety clearance, thus forming a leakage air intake passage, the direction of described leakage air intake passage is by the export department of the import department of impeller towards impeller.
2. centrifugal blower according to claim 1, is characterized in that described air-intaker is formed by connecting by external air inlet device and interior air-intaker, and front end and the casing of described external air inlet device are fixed, and rear end is connected with interior air-intaker, and the rear end of described interior air-intaker stretches in impeller.
3. centrifugal blower according to claim 2, is characterized in that the outer wall of described interior air-intaker is provided with circular projection in the position in corresponding impeller inlet portion.
4. the centrifugal blower according to Claims 2 or 3, is characterized in that described interior air-intaker is Split type structure, is formed by connecting by several point of body component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310053632.XA CN103062125B (en) | 2013-02-20 | 2013-02-20 | A kind of centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310053632.XA CN103062125B (en) | 2013-02-20 | 2013-02-20 | A kind of centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103062125A CN103062125A (en) | 2013-04-24 |
| CN103062125B true CN103062125B (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310053632.XA Active CN103062125B (en) | 2013-02-20 | 2013-02-20 | A kind of centrifugal blower |
Country Status (1)
| Country | Link |
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| CN (1) | CN103062125B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7161654B2 (en) * | 2018-02-28 | 2022-10-27 | サンデン株式会社 | Blower |
| CN114562716B (en) * | 2022-02-28 | 2023-06-27 | 江西南方锅炉股份有限公司 | Steam boiler system with air blowing mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4775295A (en) * | 1985-05-17 | 1988-10-04 | Klein, Schanzlin & Becker Aktiengesellschaft | Centrifugal pump casing |
| US5586861A (en) * | 1993-05-17 | 1996-12-24 | Pace Company | Airflow measuring centrifugal fan |
| CN202031885U (en) * | 2011-04-27 | 2011-11-09 | 张益民 | Improved energy-saving centrifugal fan |
| CN102287385A (en) * | 2011-09-04 | 2011-12-21 | 余旦 | Centrifugal blower fan |
| CN203051229U (en) * | 2013-02-20 | 2013-07-10 | 安徽安风风机有限公司 | Centrifugal fan |
-
2013
- 2013-02-20 CN CN201310053632.XA patent/CN103062125B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4775295A (en) * | 1985-05-17 | 1988-10-04 | Klein, Schanzlin & Becker Aktiengesellschaft | Centrifugal pump casing |
| US5586861A (en) * | 1993-05-17 | 1996-12-24 | Pace Company | Airflow measuring centrifugal fan |
| CN202031885U (en) * | 2011-04-27 | 2011-11-09 | 张益民 | Improved energy-saving centrifugal fan |
| CN102287385A (en) * | 2011-09-04 | 2011-12-21 | 余旦 | Centrifugal blower fan |
| CN203051229U (en) * | 2013-02-20 | 2013-07-10 | 安徽安风风机有限公司 | Centrifugal fan |
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| Publication number | Publication date |
|---|---|
| CN103062125A (en) | 2013-04-24 |
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