CN105386995A - High-pressure centrifugal fan capable of reducing wind leakage amount - Google Patents
High-pressure centrifugal fan capable of reducing wind leakage amount Download PDFInfo
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- CN105386995A CN105386995A CN201510851839.0A CN201510851839A CN105386995A CN 105386995 A CN105386995 A CN 105386995A CN 201510851839 A CN201510851839 A CN 201510851839A CN 105386995 A CN105386995 A CN 105386995A
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- impeller
- fin
- spiral case
- main shaft
- centrifugal fan
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Abstract
The invention discloses a high-pressure centrifugal fan capable of reducing wind leakage amount. The high-pressure centrifugal fan capable of reducing wind leakage amount comprises an impeller, a spindle and a volute. The spindle enters from the middle of the rear end of the volute and is in transmission connection with the impeller. The high-pressure centrifugal fan capable of reducing wind leakage is characterized in that a plurality of fins which are distributed in the radial direction are fixed to a shaft sleeve outside a rear disc of the impeller in the circumferential direction, the length of each fin is smaller than the radius of the rear disc of the impeller, and the outer end of each fin is fixed to the rear disc of the impeller. By arranging the fins on the shaft sleeve outside the rear disc of the impeller, kinetic energy diffused during operation of the impeller of the fan can be converted into pressure energy again, the amount of gas leaking from a gap between the spindle and the volute of the fan is reduced, and the efficiency of the fan is improved.
Description
Technical field
The present invention relates to centrifugal high pressure fan, specifically a kind of centrifugal high pressure fan reducing air quantity and leak.
Background technique
Centrifugal high pressure fan is made up of parts such as impeller, spiral case, main shafts, and be provided with suction port in the middle of spiral case front end, spiral case side is provided with air outlet, and main shaft is entered by spiral case rear end intermediate portion and is in transmission connection with impeller.During impeller work, there are two regions that pressure is higher and pressure is lower in machine, simultaneously, owing to certainly existing gap between moving element and fixed component, this just makes gas have from zone of high pressure by slot leakage to low pressure area, such as enters the low pressure area between impeller hub disk and spiral case by plate edge after impeller, continuing, you leak from gap location between blower fan main shaft and spiral case, form external leakage loss, the air quantity of blower fan, blast are reduced, efficiency reduces.Particularly when fan outlet builds the pressure, steaming from the clearance leakage between blower fan main shaft and spiral case can be very serious, causes site environment to pollute.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of centrifugal high pressure fan reducing air quantity and leak is provided, gas can be reduced from clearance leakage between blower fan main shaft and spiral case, improve fan efficiency.
For achieving the above object, present invention employs following technological scheme: comprise impeller, main shaft and spiral case, main shaft is entered by spiral case rear end intermediate portion and is in transmission connection with impeller; Coil after the impeller on outside axle sleeve and be along the circumferential direction fixed with several fin radially distributed, the length of fin is less than impeller hub disk radius, and fin outboard end is fixed on impeller hub disk.When the impeller is rotated, be fixed on fin on impeller sleeve with impeller synchronous rotary, air between fin impeller hub disk and spiral case rotates, the air pressure at this position is increased, thus reduce the pressure reduction with blower fan air outlet place, stop gas to enter impeller hub disk outside, thus can reduce the leakage rate of gas from gap between blower fan main shaft and spiral case, improve fan efficiency.
For increasing fin to the agitation of air, fin is not less than 10cm along the width of main shaft axis.
Preferably, the quantity of fin is 6 ~ 8.
Beneficial effect of the present invention is: by arranging fin on the axle sleeve coiling outside after the impeller, draught fan impeller can be in operation the loose kinetic energy overflow from newly changing into pressure energy, reduce the pressure reduction of impeller hub disk outer low pressure district and zone of high pressure, place, blower fan air outlet, gas is stoped to enter impeller hub disk outside, thus can reduce the leakage rate of gas from gap between blower fan main shaft and spiral case, improve fan efficiency.In addition, this improvement also have structure simple, invest little, fin does not need F-SP to construct, and can directly be welded on above draught fan impeller, and do not need to do any change to volute of blower, reliability is strong.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the right elevation of impeller in Fig. 1.
In figure, the implication of label symbol is as follows:
1-spiral case, 11-suction port 12-air outlet 13,14-gap
2-main shaft
31-impeller front disc 32-blade 33-impeller hub disk 34-axle sleeve
4-fin
Embodiment
Below in conjunction with accompanying drawing, the technological scheme in the embodiment of the present invention is clearly and completely described.
As shown in Figure 1, 2, the present invention includes impeller, main shaft 2 and spiral case 1, impeller is made up of the forward and backward dish 31,33 of impeller of blade 32 and stator blade, suction port 11 is provided with in the middle of spiral case 1 front end, spiral case 1 side is provided with air outlet 12, and main shaft 2 is entered by spiral case 1 rear end intermediate portion and is in transmission connection with impeller; The axle sleeve 34 coiling 33 outsides after the impeller is along the circumferential direction fixed with several fin 4 radially distributed, and the length of fin 4 is less than impeller hub disk 33 radius, and fin 4 outboard end is fixed by welding on impeller hub disk 33.
Fin 4 is not less than 10cm along the width of main shaft axis.
The quantity of fin 4 is preferably 6 ~ 8.
When the impeller is rotated, be fixed on fin 4 on impeller sleeve 34 with impeller synchronous rotary, air between fin 4 impeller hub disk 33 and spiral case 1 rotates, the air pressure at this position is increased, thus reduce the pressure reduction with blower fan air outlet 12 place, stop gas to enter impeller hub disk 33 by the gap 13 between impeller hub disk 33 edge and spiral case 1 outside, thus can reduce the leakage rate of gas from the gap 14 between blower fan main shaft 2 and spiral case 1, improve fan efficiency.
Claims (3)
1. can reduce the centrifugal high pressure fan that air quantity leaks, comprise impeller, main shaft (2) and spiral case (1), main shaft (2) is entered by spiral case (1) rear end intermediate portion and is in transmission connection with impeller; It is characterized in that: coil after the impeller on (33) outside axle sleeve (34) and be along the circumferential direction fixed with several fin (4) radially distributed, the length of fin (4) is less than impeller hub disk (33) radius, and fin (4) outboard end is fixed on impeller hub disk (33).
2. the centrifugal high pressure fan reducing air quantity and leak according to claim 1, is characterized in that: fin (4) is not less than 10cm along the width of main shaft axis.
3. the centrifugal high pressure fan reducing air quantity and leak according to claim 1 and 2, is characterized in that: the quantity of fin (4) is 6 ~ 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510851839.0A CN105386995A (en) | 2015-11-26 | 2015-11-26 | High-pressure centrifugal fan capable of reducing wind leakage amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510851839.0A CN105386995A (en) | 2015-11-26 | 2015-11-26 | High-pressure centrifugal fan capable of reducing wind leakage amount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105386995A true CN105386995A (en) | 2016-03-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510851839.0A Pending CN105386995A (en) | 2015-11-26 | 2015-11-26 | High-pressure centrifugal fan capable of reducing wind leakage amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105386995A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279359A (en) * | 2000-04-13 | 2001-01-10 | 丁震华 | Boosting centrifugal blower for delivering hot gas and its sealing method |
| CN2418280Y (en) * | 2000-04-13 | 2001-02-07 | 丁震华 | Boosted centrifugal air-blower for transfering coal gas |
| CN2531147Y (en) * | 2001-12-07 | 2003-01-15 | 王凯 | Fan blade |
| CN2766074Y (en) * | 2004-10-19 | 2006-03-22 | 上海通用风机股份有限公司 | Impeller with cooling wing |
| CN102080669A (en) * | 2010-09-16 | 2011-06-01 | 苏州顶裕节能设备有限公司 | Fan impeller |
| CN102465918A (en) * | 2010-11-15 | 2012-05-23 | 南通大通宝富风机有限公司 | Blower impeller with additional blade |
| CN205243937U (en) * | 2015-11-26 | 2016-05-18 | 安徽六国化工股份有限公司 | High -pressure centrifugal blower that reducible amount of wind leaked |
-
2015
- 2015-11-26 CN CN201510851839.0A patent/CN105386995A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279359A (en) * | 2000-04-13 | 2001-01-10 | 丁震华 | Boosting centrifugal blower for delivering hot gas and its sealing method |
| CN2418280Y (en) * | 2000-04-13 | 2001-02-07 | 丁震华 | Boosted centrifugal air-blower for transfering coal gas |
| CN2531147Y (en) * | 2001-12-07 | 2003-01-15 | 王凯 | Fan blade |
| CN2766074Y (en) * | 2004-10-19 | 2006-03-22 | 上海通用风机股份有限公司 | Impeller with cooling wing |
| CN102080669A (en) * | 2010-09-16 | 2011-06-01 | 苏州顶裕节能设备有限公司 | Fan impeller |
| CN102465918A (en) * | 2010-11-15 | 2012-05-23 | 南通大通宝富风机有限公司 | Blower impeller with additional blade |
| CN205243937U (en) * | 2015-11-26 | 2016-05-18 | 安徽六国化工股份有限公司 | High -pressure centrifugal blower that reducible amount of wind leaked |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160309 |
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| WD01 | Invention patent application deemed withdrawn after publication |