CN109779948A - It is a kind of for improving the plasma formula blade tip clearance encapsulating method of axial flow blower performance - Google Patents
It is a kind of for improving the plasma formula blade tip clearance encapsulating method of axial flow blower performance Download PDFInfo
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- CN109779948A CN109779948A CN201910042809.3A CN201910042809A CN109779948A CN 109779948 A CN109779948 A CN 109779948A CN 201910042809 A CN201910042809 A CN 201910042809A CN 109779948 A CN109779948 A CN 109779948A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 4
- 230000005684 electric field Effects 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims abstract description 4
- 230000007935 neutral effect Effects 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
It is a kind of for improving the plasma formula blade tip clearance encapsulating method of axial flow blower performance, step are as follows: the blade of axial flow blower and casing are changed to insulating materials；Plasma generator is set outside casing, cathode is installed in vane tip, cathode passes sequentially through conducting wire, impeller shaft electrical feedthrough is connected with plasma generator negative terminal；The mounting circular ring shape anode on the casing inner wall with vane tip face, anode are connected by conducting wire with plasma generator positive terminal；Start axial flow blower, start plasma generator, electric field is formed between positive electrode and negative electrode, so that the air between positive electrode and negative electrode is generated ionization, with the high speed rotation of blade, plasma loop curtain will be formed in the annular gap between vane tip and casing, when the air-flow of blade pressure surface is wanted to pass through from gap, neutral particle in air-flow will collide with plasma loop curtain, and then generate blocking effect to this fraction, to reduce the throughput leaked from the gap out.
Description
Technical field
The invention belongs to axial flow blower technical fields, more particularly to a kind of for improving the plasma of axial flow blower performance
Formula blade tip clearance encapsulating method.
Background technique
The working principle of axial flow blower is when the impeller is rotated that gas can axially pass through impeller, impeller from air inlet
On blade push gas and make pressure rise, the gas after boosting, which flows through, enters guide vane after impeller, and guide vane can be by the air-flow of deflection
It is transformed into axial flow, air-flow will flow into diffuser pipe at the same time, and kinetic energy can be further transformed to pressure in diffuser pipe by gas
Energy.
But the working efficiency of axial flow blower is generally relatively low at present, due in the axial flow blower course of work, in order to prevent
Mill is touched between rotating vane and static casing, needs between Ye Dingyu casing that there are certain gaps, and due to blade
The pressure of pressure face is greater than the pressure of suction surface, inevitably results from blade tip clearance leakage, and blade tip clearance leakage can be straight
It connects and influences mainstream flowing, and will affect the lift coefficient of blade, eventually affect the performance of axial flow blower.
At this stage, for solve axial flow blower blade tip clearance leakage research also in blank stage, in order to improve axis stream
The performance of blower, it is necessary to carry out the research of axial flow blower blade tip clearance leakage, and a kind of effective blade tip clearance sealing is provided
Method.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of for improving the plasma formula leaf of axial flow blower performance
Clearance seal method is pushed up, the blank of axial flow blower blade tip clearance leakage research has effectively been filled up, the work of axial flow blower can be made
Efficiency is further enhanced.
To achieve the goals above, the present invention adopts the following technical scheme: it is a kind of for improve axial flow blower performance etc.
Ionic formula blade tip clearance encapsulating method, includes the following steps:
Step 1: the blade of axial flow blower and casing are all changed to insulating materials；
Step 2: being arranged plasma generator outside casing, installs cathode at the top of blade, cathode, which passes sequentially through, leads
Line, impeller shaft electrical feedthrough are connected with the negative terminal of plasma generator；On the casing inner wall with vane tip face
Installation anode, anode are in circular ring shape, and anode is connected by conducting wire with the positive terminal of plasma generator；
Step 3: starting axial flow blower makes blade high speed rotation；
Step 4: starting plasma generator forms electric field between positive electrode and negative electrode, makes the sky between positive electrode and negative electrode
Gas generates ionization, with the high speed rotation of blade, will form plasma in the annular gap between vane tip and casing
Ring curtain, when the air-flow of blade pressure surface is wanted to pass through from gap, the neutral particle in air-flow will occur with plasma loop curtain
Collision, and then blocking effect is generated to this fraction, to reduce the throughput leaked from the gap out.
Beneficial effects of the present invention:
The plasma formula blade tip clearance encapsulating method for being used to improve axial flow blower performance of the invention, has effectively filled up axis stream
The blank of blower blade tip clearance leakage research, can make the working efficiency of axial flow blower be further enhanced.
Detailed description of the invention
Fig. 1 is the effect principle of the plasma formula blade tip clearance encapsulating method for improving axial flow blower performance of the invention
Schematic diagram；
In figure, 1-blade, 2-casings, 3-cathode, 4-anodes, 5-plasma loop curtains.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
It is a kind of for improving the plasma formula blade tip clearance encapsulating method of axial flow blower performance, include the following steps:
Step 1: the blade 1 of axial flow blower and casing 2 are all changed to insulating materials；
Step 2: being arranged plasma generator outside casing 2, installs cathode 3 at the top of blade 1, cathode 3 successively leads to
Cross conducting wire, impeller shaft electrical feedthrough is connected with the negative terminal of plasma generator；In the casing 2 with 1 top face of blade
Anode 4 is installed, anode 4 is in circular ring shape, and anode 4 is connected by conducting wire with the positive terminal of plasma generator on inner wall；
Step 3: starting axial flow blower makes 1 high speed rotation of blade；
Step 4: starting plasma generator forms electric field between anode 4 and cathode 3, makes between anode 4 and cathode 3
Air generate ionization, with the high speed rotation of blade 1, will be formed in the annular gap between 1 top of blade and casing 2 etc.
Plasma loop curtain 5, when the air-flow of 1 pressure face of blade is wanted to pass through from gap, the neutral particle in air-flow will be with plasma
Ring curtain 5 collides, and then generates blocking effect to this fraction, to reduce the throughput leaked from the gap out.
In the present embodiment, axial flow blower is transformed as shown in Figure 1, wherein anode 4 is all made of laminar electricity with cathode 3
Pole, electrode with a thickness of 0.2mm, the rated speed of axial flow blower is 2900r/min, and the rated power of axial flow blower is
0.55kW, total pressure 350Pa, the annular gap between 1 top of blade and casing 2 is 3mm.
It can effectively improve the working efficiency of axial flow blower to be verified method of the invention, in going out for axial flow blower
Mouth side is mounted with flowmeter, and has carried out contrast test.Firstly, running axis stream wind in the case where not starting plasma generator
Machine, runing time are 1 hour, then pass through the lower 1 hour total flow of cmf record；Next, starting plasma
Axial flow blower is run in the case where device, runing time is also 1 hour, then passes through the lower 1 hour total flow of cmf record；Two
Repeat 10 tests in the case of kind, final result shows in the case where being formed with plasma loop curtain 5, axis stream wind
5% or so are averagely improved when 1 hour total flow of machine is not than starting plasma generator, it was demonstrated that effectiveness of the invention.
The scope of patent protection that scheme in embodiment is not intended to limit the invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the patents of this case.
Claims (1)
1. a kind of for improving the plasma formula blade tip clearance encapsulating method of axial flow blower performance, it is characterised in that including walking as follows
It is rapid:
Step 1: the blade of axial flow blower and casing are all changed to insulating materials；
Step 2: being arranged plasma generator outside casing, blade top install cathode, cathode pass sequentially through conducting wire,
Impeller shaft electrical feedthrough is connected with the negative terminal of plasma generator；It is installed on the casing inner wall with vane tip face
Anode, anode are in circular ring shape, and anode is connected by conducting wire with the positive terminal of plasma generator；
Step 3: starting axial flow blower makes blade high speed rotation；
Step 4: starting plasma generator forms electric field between positive electrode and negative electrode, produces the air between positive electrode and negative electrode
Raw ionization will form plasma loop curtain with the high speed rotation of blade in the annular gap between vane tip and casing,
When the air-flow of blade pressure surface is wanted to pass through from gap, the neutral particle in air-flow will collide with plasma loop curtain,
And then blocking effect is generated to this fraction, to reduce the throughput leaked from the gap out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910042809.3A CN109779948B (en) | 2019-01-17 | 2019-01-17 | Plasma type blade top gap sealing method for improving performance of axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910042809.3A CN109779948B (en) | 2019-01-17 | 2019-01-17 | Plasma type blade top gap sealing method for improving performance of axial flow fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109779948A true CN109779948A (en) | 2019-05-21 |
| CN109779948B CN109779948B (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910042809.3A Active CN109779948B (en) | 2019-01-17 | 2019-01-17 | Plasma type blade top gap sealing method for improving performance of axial flow fan |
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| WO2005114013A1 (en) * | 2004-05-20 | 2005-12-01 | Rolls-Royce Plc | Sealing arrangement |
| CN1793665A (en) * | 2006-01-12 | 2006-06-28 | 上海交通大学 | Low noise axial fan with rotary deflecting ring |
| EP1914391A2 (en) * | 2006-10-13 | 2008-04-23 | General Electric Company | Plasma blade tip clearance control |
| WO2008154592A2 (en) * | 2007-06-11 | 2008-12-18 | University Of Florida Research Foundation, Inc. | Electrodynamic control of blade clearance leakage loss in turbomachinery applications |
| WO2009086387A1 (en) * | 2007-12-28 | 2009-07-09 | General Electric Company | Instability mitigation system for a rotor |
| CN102913399A (en) * | 2012-11-06 | 2013-02-06 | 中国科学院工程热物理研究所 | Plasma flow control method for reducing the wake loss of a wind turbine |
| CN103133391A (en) * | 2011-12-01 | 2013-06-05 | 中国科学院工程热物理研究所 | Cartridge receiver processing system |
| CN103835888A (en) * | 2012-11-20 | 2014-06-04 | 中国科学院工程热物理研究所 | Device and system for wind turbine braking |
| CN103925152A (en) * | 2014-04-23 | 2014-07-16 | 哈尔滨工业大学 | Wind turbine blade based on dielectric barrier discharging plasma excitation |
| CN104138712A (en) * | 2013-05-06 | 2014-11-12 | 孙红梅 | Wind wheel electrode discharging device |
| CN105673559A (en) * | 2016-04-13 | 2016-06-15 | 上海理工大学 | Efficient meridian acceleration axial flow fan with casing |
| JP2017053261A (en) * | 2015-09-08 | 2017-03-16 | 国立研究開発法人産業技術総合研究所 | Pressure loss reduction device for fluid machinery |
-
2019
- 2019-01-17 CN CN201910042809.3A patent/CN109779948B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1491527A (en) * | 2001-02-12 | 2004-04-21 | Se�������幫˾ | Apparatus for generating low temperature plasma at atmospheric pressure |
| WO2005114013A1 (en) * | 2004-05-20 | 2005-12-01 | Rolls-Royce Plc | Sealing arrangement |
| CN1793665A (en) * | 2006-01-12 | 2006-06-28 | 上海交通大学 | Low noise axial fan with rotary deflecting ring |
| EP1914391A2 (en) * | 2006-10-13 | 2008-04-23 | General Electric Company | Plasma blade tip clearance control |
| WO2008154592A2 (en) * | 2007-06-11 | 2008-12-18 | University Of Florida Research Foundation, Inc. | Electrodynamic control of blade clearance leakage loss in turbomachinery applications |
| WO2009086387A1 (en) * | 2007-12-28 | 2009-07-09 | General Electric Company | Instability mitigation system for a rotor |
| CN103133391A (en) * | 2011-12-01 | 2013-06-05 | 中国科学院工程热物理研究所 | Cartridge receiver processing system |
| CN102913399A (en) * | 2012-11-06 | 2013-02-06 | 中国科学院工程热物理研究所 | Plasma flow control method for reducing the wake loss of a wind turbine |
| CN103835888A (en) * | 2012-11-20 | 2014-06-04 | 中国科学院工程热物理研究所 | Device and system for wind turbine braking |
| CN104138712A (en) * | 2013-05-06 | 2014-11-12 | 孙红梅 | Wind wheel electrode discharging device |
| CN103925152A (en) * | 2014-04-23 | 2014-07-16 | 哈尔滨工业大学 | Wind turbine blade based on dielectric barrier discharging plasma excitation |
| JP2017053261A (en) * | 2015-09-08 | 2017-03-16 | 国立研究開発法人産業技術総合研究所 | Pressure loss reduction device for fluid machinery |
| CN105673559A (en) * | 2016-04-13 | 2016-06-15 | 上海理工大学 | Efficient meridian acceleration axial flow fan with casing |
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| CN109779948B (en) | 2021-01-05 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210514 Address after: 330200 no.2377 hanghanghangcheng Avenue, high tech Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi Zhongfa Tianxin Aero Engine Technology Co.,Ltd. Address before: 110136, Liaoning, Shenyang moral and Economic Development Zone, No. 37 South Avenue moral Patentee before: SHENYANG AEROSPACE University |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Plasma Blade Tip Gap Sealing Method for Improving the Performance of Axial Flow Fans Granted publication date: 20210105 Pledgee: CITIC Bank Nanchang branch of Limited by Share Ltd. Pledgor: Jiangxi Zhongfa Tianxin Aero Engine Technology Co.,Ltd. Registration number: Y2024980008468 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |