CN102287382A - High-pressure centrifugal fan - Google Patents
High-pressure centrifugal fan Download PDFInfo
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- CN102287382A CN102287382A CN2010102025575A CN201010202557A CN102287382A CN 102287382 A CN102287382 A CN 102287382A CN 2010102025575 A CN2010102025575 A CN 2010102025575A CN 201010202557 A CN201010202557 A CN 201010202557A CN 102287382 A CN102287382 A CN 102287382A
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- fan
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- improved
- casing
- blower fan
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Abstract
The invention discloses a high-pressure centrifugal fan which is a domestic initiative wide-machine narrow-shell impeller design mode. A machine-shell scalene-base integral diffusing structure and a backward type impeller are matched to be used, thus the width of the whole machine shell is increased in the original basis. A volute molded line is provided with four scalene bases, thus a fan generates a large pressure coefficient under a wider machine shell, the flow velocity of an outlet of the fan is reduced, the degree of reaction, omega, of the fan is increased, the static pressure of the fan is increased, the dynamic pressure is reduced, and the efficiency is improved; and although the change of a technical system of the fan is larger, the fan can run in an efficient area, the running process of the fan is efficient and saves energy compared with the running process of the current fan, and the situation of motor overload does not happen. An arc reversely-bent blade is utilized, thus a long runner can be ensured, and a steady flow area is relatively longer. Eddy current and resistance formed by air admission through a reasonable mounting angle reduces, thus the pneumatic performance is improved. An attach angle i of an airflow of the fan is close to 0 DEG, thus the non-impaction entrance of the airflow into a blade channel is greatly ensured, a situation of boundary-layer separation is avoided, and the efficiency of the fan is improved.
Description
Technical field
The present invention relates to a kind of high pressure centrifugal fan, the high pressure centrifugal fan of a kind of wide casing narrow leaf wheel of saying so more specifically.
Background technique
At present domestic high pressure centrifugal fan design is many with reference to the design method on the fan design handbook, be designed to a kind of blower fan of narrow casing narrow leaf wheel, casing adopts the method for machine mouth diffusion to control the rate of outflow, this Design Mode is selected forward direction type fan impeller for use, this design makes the fan operation inefficiency, process system changes a little, the flow, the variation in pressure that need blower fan to provide are bigger, cause the current flow of motor very big, power consumption increases, phenomenon appears transshipping in motor easily, makes can not satisfy the requirement of existing market to blower fan by the type blower fan poor stability.
Summary of the invention
The present invention adopts the wide casing narrow leaf wheel Design Mode of domestic initiation, whole diffusion structure in casing inequilateral base side and backward type impeller are used, increased the width of single-piece frame on the original basis, the spiral case molded lines adopts four inequilateral base sides, make blower fan under the casing of broad, produce big pressure coefficient, reduced the flow velocity of blower fan outlet, make the reactivity Ω of blower fan increase, thereby make the static pressure of blower fan be improved, dynamic pressure reduces, and efficient is improved, even fanman's process system changes greatly, blower fan still can be in the operation of efficient district, and the existing blower fan of its operating ratio is energy-efficient, the motor overload phenomenon can not occur; The camber backward bent vane that adopts can guarantee that runner is long, and the current stabilization district is longer relatively; Reasonably setting angle has reduced eddy current and resistance that air inlet forms, thereby has improved aeroperformance; Fan airflow angle of attack i has guaranteed well that near 0 ° air-flow does not have impact and enters Ye Dao, has avoided boundary layer separation, makes fan efficiency be improved.
High pressure centrifugal fan of the present invention is achieved through the following technical solutions, its by: motor, impeller, casing, main shaft, bearing support, shaft end seal are formed, impeller is by shroud, hub disk, blade, wheel hub is formed, and it is characterized in that: casing adopts the whole diffusion structure in inequilateral base side, the width of casing is greater than the width of blade, and the spiral case molded lines adopts four inequilateral base sides; Blade adopts 10 arc backward leaning vanes; Shroud, hub disk and blade adopt the welded structure moulding; Its shroud adopts the taper shroud, and angle of inclination γ is 10 °, and fan airflow angle of attack i is near 0 °; Preferred 60 ° of its blade outlet angle α, preferred 32.4 ° of stagger angle degree β.
Embodiment
A kind of high pressure centrifugal fan of the present invention, its by: impeller 1, casing 2, main shaft 3, bearing support 4, shaft end seal 5, motor 6 are formed, impeller is by shroud 11, hub disk 12, blade 13, wheel hub 14 is formed, and it is characterized in that: casing adopts the whole diffusion structure in inequilateral base side, the width of casing is greater than the width of blade, and the spiral case molded lines adopts four inequilateral base sides; Blade adopts 10 arc backward leaning vanes; Shroud, hub disk and blade adopt the welded structure moulding; Its shroud adopts the taper shroud, and angle of inclination γ is 10 °, and fan airflow angle of attack i is near 0 °; Preferred 60 ° of its blade outlet angle α, preferred 32.4 ° of stagger angle degree β.
The present invention adopts whole diffusion structure in casing inequilateral base side and backward type impeller to be used, increased the width of single-piece frame on the original basis, the spiral case molded lines adopts four inequilateral base sides, make blower fan under the casing of broad, produce big pressure coefficient, reduced the flow velocity of blower fan outlet, make the reactivity Ω of blower fan increase, thereby make the static pressure of blower fan be improved, dynamic pressure reduces, efficient is improved, even fanman's process system changes greatly, blower fan still can be in the operation of efficient district, the existing blower fan of its operating ratio is energy-efficient, the motor overload phenomenon can not occur; The camber backward bent vane can guarantee that runner is long, and the current stabilization district is longer relatively; Reasonably setting angle has reduced eddy current and resistance that air inlet forms, thereby has improved aeroperformance; Fan airflow angle of attack i has guaranteed well that near 0 ° air-flow does not have impact and enters Ye Dao, has avoided boundary layer separation, makes fan efficiency be improved.
Claims (3)
1. efficient high-pressure blower fan, form by motor, impeller, casing, main shaft, bearing support, shaft end seal, wherein impeller is by shroud, hub disk, blade, wheel hub is formed, and it is characterized in that: casing adopts the whole diffusion structure in inequilateral base side, the width of casing is greater than the width of blade, and the spiral case molded lines adopts four inequilateral base sides.
2. a kind of efficient high-pressure blower fan according to claim 1 is characterized in that: its shroud adopts the taper shroud, and angle of inclination γ is 10 °, and fan airflow angle of attack i is near 0 °.
3. a kind of efficient high-pressure blower fan according to claim 1 is characterized in that: preferred 60 ° of its blade outlet angle α, preferred 32.4 ° of stagger angle degree β.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102025575A CN102287382A (en) | 2010-06-17 | 2010-06-17 | High-pressure centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102025575A CN102287382A (en) | 2010-06-17 | 2010-06-17 | High-pressure centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102287382A true CN102287382A (en) | 2011-12-21 |
Family
ID=45334060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102025575A Pending CN102287382A (en) | 2010-06-17 | 2010-06-17 | High-pressure centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102287382A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815537A (en) * | 2012-08-30 | 2012-12-12 | 浙江兴益风机电器有限公司 | Novel centrifugal fan |
| CN110647087A (en) * | 2019-10-18 | 2020-01-03 | 哈尔滨朗昇电气股份有限公司 | Novel intelligent fan controller |
-
2010
- 2010-06-17 CN CN2010102025575A patent/CN102287382A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815537A (en) * | 2012-08-30 | 2012-12-12 | 浙江兴益风机电器有限公司 | Novel centrifugal fan |
| CN110647087A (en) * | 2019-10-18 | 2020-01-03 | 哈尔滨朗昇电气股份有限公司 | Novel intelligent fan controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111221 |