CN103807084A - Eddy elimination device in hydraulic turbine runner body - Google Patents
Eddy elimination device in hydraulic turbine runner body Download PDFInfo
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- CN103807084A CN103807084A CN201410034139.8A CN201410034139A CN103807084A CN 103807084 A CN103807084 A CN 103807084A CN 201410034139 A CN201410034139 A CN 201410034139A CN 103807084 A CN103807084 A CN 103807084A
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- blade
- whirlpool
- runner
- disappears
- eddy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
An eddy elimination device in a hydraulic turbine runner body comprises eddy elimination blades arranged on a runner cone in the water turbine runner body, wherein the eddy elimination blades are arranged between following edges of roots of every two adjacent runner paddles, the diameter of each eddy elimination blade is smaller than that of each runner paddle, and the quantity of the eddy elimination blades is identical to that of the runner paddles. By means of the eddy elimination device in the hydraulic turbine runner body, the tail water eddy stripe can be effectively reduced, pressure fluctuation is reduced, service life of a hydraulic turbine set is prolonged, energy of the tail water eddy stripe can be recycled, and efficiency of a hydraulic turbine is increased.
Description
Technical field
The present invention relates to turbine technology field, be specifically related to movable propeller turbine, relate in particular to be contained in web on draft cone for eliminating the device of tail water whirlpool band.
Background technique
Water turbine and subsidiary engine are the requisite constituent elements of hydroelectric power industry, are to make full use of the visual plant that clean reproducible energy is realized energy-saving and emission-reduction, reduced environmental pollution.Water turbine is as one of equipment in current most important generation technology, although there is higher efficiency, but still have certain loss in efficiency, especially its runner blade can cause tail water whirlpool band under sub load, for the generation of vibration adverse effect of water wheels unit.Particularly, at runner blade trailing edge water export place, if when the tangential velocity that the appearance of outlet water velocity is identical with runner sense of rotation and outlet velocity value are larger, can in draft tube, form whirlpool band, cause water wheels unit fluctuation of service, and in the time that the tangential velocity contrary with runner sense of rotation appears in outlet water velocity, at outlet of rotary wheel place, can form the rotary water current of two strands of opposite directions, two strands of current produce collision mutually, consumed energy, has increased the kinetic energy rejection in runner blade trailing edge water export place and draft tube.In prior art, be to adopt between stator and runner bucket or tonifying Qi in draft tube at runner for eliminating the major measure of tail water whirlpool band, to reduce pressure pulsation, but due to optional equipment being installed in through-flow channel, make the Efficiency Decreasing of water turbine.
Summary of the invention
The applicant improves for above-mentioned shortcoming of the prior art, the whirlpool device that disappears in a kind of Hydraulic Turbine Rotor is provided, it can effectively eliminate tail water whirlpool band, reduce pressure pulsation, strengthen the working life of water wheels unit, and can effectively reclaim tail water whirlpool band energy, improve the efficiency of water turbine.
Technological scheme of the present invention is as follows:
The whirlpool device that disappears in Hydraulic Turbine Rotor, is included in the whirlpool blade that disappears of installing on the draft cone in Hydraulic Turbine Rotor, disappears whirlpool blade between two adjacent runner blades, and the diameter of the whirlpool blade that disappears is less than the diameter of runner blade.
Its further technological scheme is:
The described whirlpool blade that disappears is consistent with the quantity of runner blade.
The described whirlpool blade that disappears is positioned at the middle of two adjacent runner blade blade root lagging edges.
The described diameter of whirlpool blade and the diameter of the runner blade ratio of disappearing is 0.27～0.32.
The absolute value of the corner of the described whirlpool blade that disappears and the difference of runner blade corner is less than or equal to 6 °
Technique effect of the present invention:
The present invention by installing the whirlpool blade that disappears on draft cone, the tail water whirlpool band that the whirlpool that comes off on draft cone and runner blade is interacted produce is in the time initially moving to turbine draft tube, run into the effect of the whirlpool blade that disappears, Bei Xiao whirlpool, whirlpool blade is broken up, make can not form again very strong whirlpool band in draft tube, it is gentle stable that tail flow field becomes, thereby effectively eliminate tail water whirlpool band, reduce the pulsation source that causes pressure pulsation, reduce vibration, reduce the possibility of draft tube cavity cavitation, extended the working life of water wheels units; Disappear whirlpool blade in the process that tail water whirlpool band is broken up simultaneously, produce the torque identical with runner blade sense of rotation, the Conversion of Energy that makes tail water whirlpool band is the identical torque of runner blade sense of rotation on the blade of whirlpool that disappears, effectively reclaim the energy of tail water whirlpool band, from having improved the efficiency of water turbine.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the stressed schematic diagram of the present invention in water flow field, in figure, T represents the hydraulic thrust that runner blade is subject to, M represents the moment that hydraulic thrust that runner blade is subject to produces, the T ＇ hydraulic thrust that whirlpool blade is subject to that represents to disappear, the M ＇ moment that hydraulic thrust that whirlpool blade is subject to produces that represents to disappear, in figure, the hydraulic thrust direction of the two is identical.
Fig. 3 is the schematic diagram of the mounting point relation of disappear whirlpool leaf and runner blade of the present invention.
Wherein: 1, draft cone; 2, the whirlpool blade that disappears; 3, runner blade; 4, runner boss.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
See Fig. 1, the whirlpool device that disappears of the present invention is included in the whirlpool blade 2 that disappears of installing on the draft cone 1 in movable propeller turbine runner body, disappears whirlpool blade 2 between two adjacent runner blades 3, and the diameter of the whirlpool blade 2 that disappears is less than the diameter of runner blade 3.
Further, in order to keep the symmetrical configuration balance of whole Hydraulic Turbine Rotor, preferably, the whirlpool blade 2 that disappears described in making is consistent with the quantity of runner blade 3, and the whirlpool blade 2 that disappears is preferably positioned at the middle of the spacing of two adjacent runner blade 3 blade root lagging edges, see Fig. 3, the spacing of two adjacent runner blade 3 blade root lagging edges is L, and the whirlpool blade 2 that disappears is positioned at the middle of two adjacent runner blade 3 blade roots, the distance disappearing between whirlpool blade 2 and two adjacent runner blade 3 blade root lagging edges is L/2, specifically can adopt the guide margin elongation line of the whirlpool blade 2 that disappears and the lagging edge elongation line of runner blade 3 to offset whirlpool blade 2 positions, in order to reach the optimum whirlpool effect that disappears, disappear described in the control diameter of whirlpool blade 2 and the diameter of runner blade 3 are than within 0.27～0.32 scope, in order to guarantee further operation stability, the absolute value of the corner of whirlpool blade 2 and the difference of runner blade 3 corners of disappearing described in making is less than or equal to 6 °, the concept of described " corner " is well known in the art, and design attitude when blade is with respect to normal operation is to the angle of opening direction or closing direction rotation.
Of the present invention disappearing whirlpool blade 2 in the situation that be not installed, under certain load, because the water velocity at runner blade 3 trailing edge water export places can produce the tangential velocity identical with runner blade 3 sense of rotation, in runner blade 3 trailing edge water export places and draft tube, form thus comparatively strong whirlpool band, this tail water whirlpool band can cause pressure pulsation, thereby affect the operation stability of water wheels unit, in order to solve this technical problem, the present invention adopts the improvement project that the whirlpool blade 2 that disappears is installed on draft cone 1, so, the tail water whirlpool band that the whirlpool band that comes off on draft cone 1 and runner blade 3 is interacted produce is in the time initially moving to turbine draft tube, run into the effect of the whirlpool blade 2 that disappears, Bei Xiao whirlpool, whirlpool blade 2 is broken up, now, the tangential velocity of runner blade 3 blade roots is weakened, the blade back pressure of runner blade 3 is improved, reduce the axial hydraulic thrust of runner blade 3, meanwhile, due to the tail water whirlpool band of having eliminated after draft cone 1, the Pressure Drop on runner boss 4 and draft cone 1 reduces, thereby has reduced the resistance on runner boss 4 and draft cone 1, the whirlpool blade 2 that simultaneously disappears produces the force and moment with runner blade 3 equidirectionals, increase the hydraulic thrust of whole water turbine, the moment that hydraulic thrust produces increases, improve thus the efficiency of water turbine, see Fig. 2, in Fig. 2, T represents the hydraulic thrust that runner blade 3 is subject to, M represents the moment that hydraulic thrust that runner blade 3 is subject to produces, the T ＇ hydraulic thrust that whirlpool blade 2 is subject to that represents to disappear, the M ＇ moment that hydraulic thrust that whirlpool blade 2 is subject to produces that represents to disappear, in figure, the hydraulic thrust direction of the two is identical, the whirlpool blade 2 that disappears produces the torque identical with runner blade 3 sense of rotation, the Conversion of Energy that makes tail water whirlpool band is the torque M ＇ of whirlpool blade 2 of disappearing, thereby improve the efficiency of water turbine.On the other hand, the elimination of tail water whirlpool band, makes tail water flow field more gentle stable, has reduced the possibility of draft tube cavity cavitation, reduces vibration, has extended the working life of water wheels units.
More than describing is explanation of the invention, is not the restriction to invention, and limited range of the present invention, referring to claim, within protection scope of the present invention, can be done any type of modification.
Claims (5)
1. the whirlpool device that disappears in Hydraulic Turbine Rotor, it is characterized in that: be included in the upper whirlpool blade (2) that disappears of installing of draft cone (1) in Hydraulic Turbine Rotor, the whirlpool blade (2) that disappears is positioned between two adjacent runner blades (3), and the diameter of the whirlpool blade (2) that disappears is less than the diameter of runner blade (3).
2. by the whirlpool device that disappears in Hydraulic Turbine Rotor claimed in claim 1, it is characterized in that: described in the whirlpool blade (2) that disappears consistent with the quantity of runner blade (3).
3. by the whirlpool device that disappears in Hydraulic Turbine Rotor claimed in claim 1, it is characterized in that: described in the whirlpool blade (2) that disappears be positioned at the middle of two adjacent runner blade (3) blade root lagging edges.
4. by the whirlpool device that disappears in Hydraulic Turbine Rotor claimed in claim 1, it is characterized in that: described in the disappear diameter of whirlpool blade (2) and the diameter ratio of runner blade (3) be 0.27～0.32.
5. by the whirlpool device that disappears in Hydraulic Turbine Rotor claimed in claim 1, it is characterized in that: described in the disappear absolute value of the corner of whirlpool blade (2) and the difference of runner blade (3) corner be less than or equal to 6 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410034139.8A CN103807084A (en) | 2014-01-24 | 2014-01-24 | Eddy elimination device in hydraulic turbine runner body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410034139.8A CN103807084A (en) | 2014-01-24 | 2014-01-24 | Eddy elimination device in hydraulic turbine runner body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103807084A true CN103807084A (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410034139.8A Pending CN103807084A (en) | 2014-01-24 | 2014-01-24 | Eddy elimination device in hydraulic turbine runner body |
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| CN (1) | CN103807084A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087904A (en) * | 2016-08-05 | 2016-11-09 | 浙江水利水电学院 | Hydraulic structure outlet vortex reducing means |
| CN106121893A (en) * | 2016-07-29 | 2016-11-16 | 河海大学 | A kind of impeller system absorbing water energy |
| CN106870243A (en) * | 2017-02-27 | 2017-06-20 | 江苏大学镇江流体工程装备技术研究院 | A kind of multi-state multistage turbine |
| WO2021077222A1 (en) * | 2019-10-25 | 2021-04-29 | Composite Hydraulic Turbine Ottawa Inc. | Self-regulating water turbine runner, water turbine equipped with sub-runner located upstream of the main runner and water turbine comprising the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010112336A (en) * | 2008-11-10 | 2010-05-20 | Toshiba Corp | Francis hydraulic machine, and runner for the same |
| CN102923285A (en) * | 2012-10-12 | 2013-02-13 | 中国船舶重工集团公司第七○二研究所 | Vortex removal fin of propeller hub |
| CN103206331A (en) * | 2013-02-07 | 2013-07-17 | 河海大学 | Low-head efficient shaft-extension tubular pump turbine and blades thereof |
| CN103233846A (en) * | 2012-12-04 | 2013-08-07 | 河海大学 | Low water head vertical shaft through-flow bi-directional efficient turbine runner as well as electromechanical device and mated flow passage thereof |
| CN203239485U (en) * | 2013-04-10 | 2013-10-16 | 河海大学 | Bulb through-flow turbine used for micro waterhead power station |
| CN103397975A (en) * | 2013-08-16 | 2013-11-20 | 重庆同利实业有限公司 | Standard floating pipe type hydroelectric generator |
-
2014
- 2014-01-24 CN CN201410034139.8A patent/CN103807084A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010112336A (en) * | 2008-11-10 | 2010-05-20 | Toshiba Corp | Francis hydraulic machine, and runner for the same |
| CN102923285A (en) * | 2012-10-12 | 2013-02-13 | 中国船舶重工集团公司第七○二研究所 | Vortex removal fin of propeller hub |
| CN103233846A (en) * | 2012-12-04 | 2013-08-07 | 河海大学 | Low water head vertical shaft through-flow bi-directional efficient turbine runner as well as electromechanical device and mated flow passage thereof |
| CN103206331A (en) * | 2013-02-07 | 2013-07-17 | 河海大学 | Low-head efficient shaft-extension tubular pump turbine and blades thereof |
| CN203239485U (en) * | 2013-04-10 | 2013-10-16 | 河海大学 | Bulb through-flow turbine used for micro waterhead power station |
| CN103397975A (en) * | 2013-08-16 | 2013-11-20 | 重庆同利实业有限公司 | Standard floating pipe type hydroelectric generator |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121893A (en) * | 2016-07-29 | 2016-11-16 | 河海大学 | A kind of impeller system absorbing water energy |
| CN106121893B (en) * | 2016-07-29 | 2018-08-21 | 河海大学 | A kind of impeller system absorbing water energy |
| CN106087904A (en) * | 2016-08-05 | 2016-11-09 | 浙江水利水电学院 | Hydraulic structure outlet vortex reducing means |
| CN106087904B (en) * | 2016-08-05 | 2017-12-15 | 浙江水利水电学院 | Hydraulic structure delivery port vortex reducing means |
| CN106870243A (en) * | 2017-02-27 | 2017-06-20 | 江苏大学镇江流体工程装备技术研究院 | A kind of multi-state multistage turbine |
| WO2021077222A1 (en) * | 2019-10-25 | 2021-04-29 | Composite Hydraulic Turbine Ottawa Inc. | Self-regulating water turbine runner, water turbine equipped with sub-runner located upstream of the main runner and water turbine comprising the same |
| US11879423B2 (en) | 2019-10-25 | 2024-01-23 | Composite Hydraulic Turbine Ottawa Inc. | Self-regulating water turbine runner, water turbine equipped with sub-runner located upstream of the main runner and water turbine comprising the same |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140521 |