CN106438467A - Centrifugal fan and variable work condition adjustment method thereof - Google Patents
Centrifugal fan and variable work condition adjustment method thereof Download PDFInfo
- Publication number
- CN106438467A CN106438467A CN201611090472.6A CN201611090472A CN106438467A CN 106438467 A CN106438467 A CN 106438467A CN 201611090472 A CN201611090472 A CN 201611090472A CN 106438467 A CN106438467 A CN 106438467A
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- CN
- China
- Prior art keywords
- impeller
- hub disk
- fan
- centrifugal blower
- pull bar
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/287—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps with adjusting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal fan and a variable work condition adjustment method thereof and particularly discloses a variable work condition adjustment method of the centrifugal fan. The variable work condition adjustment method comprises the steps that when a work condition point needs to be changed, an impeller of the fan is stopped from rotating, the proper outlet width of the impeller is selected according to a comprehensive performance curve of the fan; bolts (8) are taken off, a pull ring (7) is pulled to enable a pull rod (10) to move horizontally, and accurate positions for positioning holes (9) are selected; and the bolts (8) are mounted, a movable rear disc (3) is fixed, a start button of the fan is pressed, and the impeller of the centrifugal fan works normally. According to the variable work condition adjustment method, the flow and the characteristic curve of the fan are changed by changing the width of the impeller; compared with front guide device adjustment and throttle adjustment, the work range can be widened, and the system efficiency and the adjustment efficiency are improved; and compared with variable rotating speed adjustment, the cost can be saved, and the economy is good.
Description
Technical field
The invention belongs to blower fan technical field is and in particular to a kind of centrifugal blower and its variable working condition control method.
Background technology
The regulating working conditions of centrifugal blower refer to require to change its operating point due to the change of external load, are changed with artificial method
Variable working condition point parameter.Because operating point is to be determined by the intersection point of fan performance curve and characteristic curve of pipeline, adjust work
The mode of condition point has three kinds：Change the characteristic curve of blower fan；Change characteristic curve of pipeline；The two changes simultaneously.Based on impeller width
That the regulation measure of degree mainly changes is impeller outlet width b2, according to Eulerian equationEnter
And change the characteristic curve of blower fan, reach the purpose of variable working condition regulation.The measure of centrifugal blower regulating working conditions mainly has section at present
Stream is adjusted, inlet guide vane (air deflector) is adjusted, variable speed is adjusted etc..Flow restriction control loss is serious, leading device regulating system efficiency
Less efficient with adjusting, and variable speed regulation is then relatively costly.
Content of the invention
The purpose of the present invention is to improve prior art weak point, provides a kind of centrifugal blower and its variable working condition regulation side
Method.
For achieving the above object, the present invention employs the following technical solutions：
A kind of centrifugal blower includes impeller it is characterised in that described impeller is provided with shroud and mobile hub disk, described movement
Hub disk is provided with groove, and described groove runs through and is provided with blade, and described blade two ends are respectively welded shroud and fixing hub disk, described
Fixing hub disk is provided with 4 through holes along center circle distribution, and described through hole is through with pull bar, described pull bar one end and mobile hub disk
Welding, the other end passes through shaft coupling.
Further, described shaft coupling is connected with main shaft, and described shaft coupling both sides are provided with by the fixing mobile hub disk of location hole
Bolt.
Further, described pull bar is provided with location hole, and described location hole is uniformly distributed along pull bar.
Further, described mobile hub disk changes position by location hole.
A kind of centrifugal blower variable working condition control method is it is characterised in that comprise the following steps：
A, when needing to change operating point, stop draught fan impeller and rotate, according to fan comprehensive performance curve, select suitable leaf
Wheel exit width；
B, take off bolt, pull draw ring, so that pull bar is moved horizontally, select accurate position of positioning hole；
C, installation bolt, fixing mobile hub disk, open blower fan start button, centrifugal blower fan blade wheel normal operation.
Beneficial effects of the present invention are：The present invention passes through to improve, and by changing impeller width thus changing compressor flow, enters
And change fan performance curve.Adjust with respect to leading device, impeller width adjusting can broaden the scope of work, improve system effectiveness and
Adjust efficiency, be a kind of efficient conservation measures.Adjust compared to variable speed, cost-saved, good economy performance.
Brief description
Fig. 1 is present configuration schematic diagram.
Fig. 2 is that the present invention moves hub disk structural representation.
Fig. 3 is the centrifugal blower performance curve of a certain model.
Fig. 4 is the centrifugal blower efficiency-flow curve of a certain model.
Fig. 5 is the centrifugal blower Pressure-flow curves of a certain model.
In figure：1st, shroud；2nd, blade；3rd, mobile hub disk；4th, fixing hub disk；5th, shaft coupling；6th, main shaft；7th, draw ring；8th, spiral shell
Bolt；9th, location hole；10th, pull bar；11st, through hole；12nd, groove.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
A kind of centrifugal blower as shown in Figure 1 and Figure 2, including impeller it is characterised in that described impeller be provided with shroud 1 and
Mobile hub disk 3, described mobile hub disk 3 is provided with groove 12, and described groove 12 runs through and is provided with blade 2, and described blade 2 two ends are respectively
It is welded with shroud 1 and fixing hub disk 4, described fixing hub disk 4 is provided with 4 through holes 11 along center circle distribution, described through hole 11
It is through with pull bar 10, described pull bar 10 one end is welded with mobile hub disk 3, and the other end passes through shaft coupling 5.
Further, described shaft coupling 5 is connected with main shaft 6, and described shaft coupling 5 both sides are provided with moves by location hole 9 is fixing
The bolt 8 of hub disk 3.
Further, described pull bar 10 is provided with location hole 9, and described location hole 9 is uniformly distributed along pull bar 10.
Further, described mobile hub disk 3 changes position by location hole 9, thus changing the position of mobile hub disk 3, and then
Change impeller outlet width, change compressor flow, pressure.
A kind of centrifugal blower variable working condition control method is it is characterised in that comprise the following steps：
A, when needing to change operating point, stop draught fan impeller and rotate, according to fan comprehensive performance curve, select suitable leaf
Wheel exit width；
B, take off bolt 8, pull draw ring 7, so that pull bar 10 is moved horizontally, select accurate location hole 9 position, change impeller
Exit width；
C, installation bolt 8, fixing mobile hub disk 3, open blower fan start button, centrifugal blower fan blade wheel normal operation.
As shown in Fig. 3, Fig. 4 and Fig. 5, type selecting impeller is the original of centrifugal blower taking the centrifugal blower of a certain model as a example
Impeller, i.e. 100%b2.According to actual demands of engineering, if needing flow to meet 6m in engineering3/ s, if now draught fan impeller is
100%b2, then its efficiency is 84.86%.When the flow of requirement of engineering is changed into 4.5m3/ s, if draught fan impeller is still 100%b2,
Then its efficiency is 75.34%, if but adjust impeller width to 90%b2, fan efficiency is changed into 77.93%.The raising meaning of efficiency
Taste power consumption and is reduced.
In this centrifugal blower varying load process, first open blower fan start button, motor rotates, and main shaft 6 rotates, shaft coupling 5
Rotate, whole impeller starts to rotate.Because external load is determined by requirement of engineering, depending on being actually needed, therefore external load is sent out
When changing requires to change fan condition point, corresponding impeller outlet width can be selected according to combination property curve.Now stop
Centrifugal blower rotates, and takes off bolt 8, pulls draw ring 7, selects accurate location hole 9 position, installation bolt 8, fixing mobile hub disk
3, finally open blower fan start button, impeller starts to rotate.
Compared to traditional centrifugal blower control method, due to efficient energy-saving, structure is simple, operation for this impeller width adjusting
The characteristic such as convenient, this centrifugal blower control method is also widely applied to other middle-size and small-size centrifugal blowers.
A kind of centrifugal blower disclosed by the invention and its variable working condition control method, first turn on blower fan and carry out operation.When outer
Boundary's load changes when requiring to change operating point, stopping blower fan, the suitable location hole 9 of selection, manual change's bolt 8 position,
Restart again after fixation.This system effectiveness and the regulation effect substantially increasing blower fan based on the mode of impeller width adjusting
Rate, thus reach the effect of energy-conservation.
Claims (5)
1. a kind of centrifugal blower, including impeller it is characterised in that described impeller is provided with shroud (1) and mobile hub disk (3), institute
State mobile hub disk (3) and be provided with groove (12), described groove (12) is run through and is provided with blade (2), and described blade (2) two ends are welded respectively
It is connected to shroud (1) and fixing hub disk (4), described fixing hub disk (4) is provided with 4 through holes (11) along center circle distribution, described
Through hole (11) is through with pull bar (10), and shaft coupling (5) is passed through with mobile hub disk (3) welding, the other end in described pull bar (10) one end.
2. a kind of centrifugal blower according to claim 1 is it is characterised in that described shaft coupling (5) is connected with main shaft (6),
Described shaft coupling (5) both sides are provided with the bolt (8) by the fixing mobile hub disk (3) of location hole (9).
3. a kind of centrifugal blower according to claim 1 is it is characterised in that described pull bar (10) is provided with location hole (9),
Described location hole (9) is uniformly distributed along pull bar (10).
4. a kind of centrifugal blower variable working condition regulation measure according to claim 1 is it is characterised in that described mobile hub disk
(3) position is changed by location hole (9).
5. a kind of centrifugal blower variable working condition control method is it is characterised in that comprise the following steps：
A, when needing to change operating point, stop draught fan impeller and rotate, according to fan comprehensive performance curve, select suitable impeller to go out
Mouth width；
B, take off bolt (8), pull draw ring (7), so that pull bar (10) is moved horizontally, select accurate location hole (9) position；
C, installation bolt (8), fixing mobile hub disk (3), open blower fan start button, centrifugal blower fan blade wheel normal operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090472.6A CN106438467A (en) | 2016-12-01 | 2016-12-01 | Centrifugal fan and variable work condition adjustment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090472.6A CN106438467A (en) | 2016-12-01 | 2016-12-01 | Centrifugal fan and variable work condition adjustment method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106438467A true CN106438467A (en) | 2017-02-22 |
Family
ID=58224123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611090472.6A Pending CN106438467A (en) | 2016-12-01 | 2016-12-01 | Centrifugal fan and variable work condition adjustment method thereof |
Country Status (1)
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| CN (1) | CN106438467A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313968A (en) * | 2017-07-13 | 2017-11-03 | 浙江双阳风机有限公司 | A kind of control method of convection rotary type axial flow fan with adjustable moving blades |
| CN108252943A (en) * | 2018-01-08 | 2018-07-06 | 上海理工大学 | Specified centrifugal blower flow and the method for the pressure slope of curve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207557A (en) * | 1992-05-08 | 1993-05-04 | American Standard Inc. | Centrifugal fan having variable width blades |
| CN1172255A (en) * | 1996-05-29 | 1998-02-04 | 光州电子株式会社 | Characteristic comparative measurement system of motor fan in vacuum cleaner |
| JPH10141280A (en) * | 1996-11-12 | 1998-05-26 | Kubota Corp | Blower |
| KR100267577B1 (en) * | 1998-07-03 | 2001-01-15 | 정영교 | Air volume adjusting fan |
| JP2005147629A (en) * | 2003-11-19 | 2005-06-09 | Shinko Kogyo Co Ltd | Blower for air conditioner |
| US7963749B1 (en) * | 2006-11-25 | 2011-06-21 | Climatecraft Technologies, Inc. | Fan with variable motor speed and disk type unloading device |
| CN105545787A (en) * | 2016-02-01 | 2016-05-04 | 江阴市精亚风机有限公司 | Impeller built-in type air volume adjusting device |
| CN105909558A (en) * | 2016-06-28 | 2016-08-31 | 江苏环亚医用科技集团股份有限公司 | Impeller with variable runner width |
-
2016
- 2016-12-01 CN CN201611090472.6A patent/CN106438467A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207557A (en) * | 1992-05-08 | 1993-05-04 | American Standard Inc. | Centrifugal fan having variable width blades |
| CN1172255A (en) * | 1996-05-29 | 1998-02-04 | 光州电子株式会社 | Characteristic comparative measurement system of motor fan in vacuum cleaner |
| JPH10141280A (en) * | 1996-11-12 | 1998-05-26 | Kubota Corp | Blower |
| KR100267577B1 (en) * | 1998-07-03 | 2001-01-15 | 정영교 | Air volume adjusting fan |
| JP2005147629A (en) * | 2003-11-19 | 2005-06-09 | Shinko Kogyo Co Ltd | Blower for air conditioner |
| US7963749B1 (en) * | 2006-11-25 | 2011-06-21 | Climatecraft Technologies, Inc. | Fan with variable motor speed and disk type unloading device |
| CN105545787A (en) * | 2016-02-01 | 2016-05-04 | 江阴市精亚风机有限公司 | Impeller built-in type air volume adjusting device |
| CN105909558A (en) * | 2016-06-28 | 2016-08-31 | 江苏环亚医用科技集团股份有限公司 | Impeller with variable runner width |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313968A (en) * | 2017-07-13 | 2017-11-03 | 浙江双阳风机有限公司 | A kind of control method of convection rotary type axial flow fan with adjustable moving blades |
| CN107313968B (en) * | 2017-07-13 | 2019-01-22 | 浙江双阳风机有限公司 | A kind of control method of convection rotary type axial flow fan with adjustable moving blades |
| CN108252943A (en) * | 2018-01-08 | 2018-07-06 | 上海理工大学 | Specified centrifugal blower flow and the method for the pressure slope of curve |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |