CN104121137A - Pressure reduction and vibration damping runner cone device - Google Patents
Pressure reduction and vibration damping runner cone device Download PDFInfo
- Publication number
- CN104121137A CN104121137A CN201410285751.2A CN201410285751A CN104121137A CN 104121137 A CN104121137 A CN 104121137A CN 201410285751 A CN201410285751 A CN 201410285751A CN 104121137 A CN104121137 A CN 104121137A
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- Prior art keywords
- cone
- runner
- spiral groove
- unit
- draft
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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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- Hydraulic Turbines (AREA)
Abstract
The invention relates to a pressure reduction and vibration damping runner cone device which comprises a runner cone (1) connected with a runner crown (3) of a rotary wheel, wherein a ribbed plate (8) is welded to the inner side of the runner cone (1), a spiral groove (9) is formed in the outer side of the runner cone (1), a water division plate (6) is arranged on a unit, and a drainage hole (5) is formed in the unit. When a mixed flow water turbine operates, the ribbed plate on the inner side of the runner cone pressurizes water flows drained out of the drainage hole, therefore, water drainage is increased, and axial hydraulic thrust of the unit is reduced; the spiral groove in the outer side of the runner cone drives the water flows close to the runner cone to rotate to smooth the water flows and perform water jet, pressure fluctuation of a draft tube is eliminated or weakened, and problems caused by hydraulic vibration are solved.
Description
Technical field
The present invention relates to Francis turbine technical field, particularly a kind of decompression damping runner cone device.
Background technique
Being most widely used of Francis turbine, this unit form has compact structure, reliable, can adapt to very wide head scope and full load efficiency advantages of higher.But there is top cover overpressure and hydraulic vibration problem in various degree in domestic and international many power stations after the operation of going into operation.Increase top cover balance pipe, top cover epicoele is communicated with tail water, can play pressure release effect.Power station employing is avoided the methods such as vibrating area operation, tonifying Qi and is solved hydraulic vibration problem.But these methods have is limited to unit and arranges and complicated structural type, what have causes serious energy waste, and effect is also undesirable.As shown in Figure 1, the crown of Francis turbine (3) locates to be provided with spilled water hole (5) and decompression plate (6), adopt this structure, leak and enter the gap between top cover decompression plate (6) and runner decompression plate (6), be subject to the effect of centrifugal force, overflow upper to top cover decompression plate (6), through spilled water hole (5), then pass through the inner chamber that draft cone (1) and aeration valve (7) surround and enter draft tube.When unit operation is during to pressure pulsation region bigger than normal, aeration valve (7) can be opened, and carries out tonifying Qi, to solve the hydraulic vibration problem of unit.Even if adopt this structure, also there is top cover overpressure and hydraulic vibration problem in various degree in domestic and international many power stations after the operation of going into operation.Liujia Gorge, there is the too high problem that causes thrust bearing shoe valve excess Temperature of runner upper cavity pressure in the water power plant of making a pilgrimage to a temple on a famous mountain greatly, and the Hydropower Plant vibrations such as Sa Yang, Yan Tan and five Qiang Xi obviously, have even occurred the breaking-up of unit.
Summary of the invention
The object of the invention is provides a kind of decompression damping runner cone device simple in structure for addressing the above problem, by improving the structure of draft cone, significantly reduce the axial hydraulic thrust of Francis turbine and reduce hydraulic vibration, guaranteeing safe, the efficiently operation of unit.Technological scheme of the present invention is: a kind of decompression damping runner cone device, comprise the draft cone (1) being connected with the crown (3) of runner and the Diversion Plate (6) arranging and spilled water hole (5) on unit, described draft cone (1) inner side is welded with uniform floor (8), and described draft cone (1) outside offers uniform spiral groove (9).
Described floor (8) is and is in tilted layout in draft cone (1), from draft cone (1) top, tilts to the bottom of draft cone (1) along unit sense of rotation, and angle of inclination is to become 20 °～40 ° angles with runner medial axis.
The number of described floor (8) is more 1 than half of spilled water hole (5) number, and when spilled water hole (5) number is odd number, the number of floor (8) is that spilled water hole (5) number adds half of 1.
Described spiral groove (9) tilts to the bottom of draft cone (1) from draft cone (1) top along unit sense of rotation, when unit runner inlet diameter is in 4m, the cornerite of spiral groove (9) is 180 °, and when unit runner inlet diameter is greater than 4m, the cornerite of spiral groove (9) is 360 °.
The number of described spiral groove (9) is more 1 than half of blade (2) number, and when blade (2) number is odd number, the number of spiral groove (9) is that blade (2) number adds half of 1.
Technique effect:
When 1, Francis turbine moves, the floor of draft cone inner side is axial vane pump structure, and the current of revealing from spilled water hole are pressurizeed by vane pump, increase vent flow, can improve top cover stressing conditions like this, reduce the axial hydraulic thrust of unit.
2, during hydraulic turbine operation, the spiral groove in draft cone outside drives near water flow rotary draft cone, guides better current to enter the center region of draft tube, as the effect of water jet, can weaken the pressure pulsation of draft tube like this, solve the problem that hydraulic vibration causes.
3, decompression damping runner cone device is simple in structure, is easy to processing, the impact that not arranged by unit, the cost of also having avoided traditional making-up air device to bring.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional draft cone;
Fig. 2 is the structural representation of decompression damping runner cone device;
Fig. 3 is the draft cone plan view with floor and spiral groove;
Fig. 4 is the draft cone worm's eye view with floor and spiral groove.
Wherein: 1 is draft cone, 2 is blade, and 3 is crown, and 4 is lower ring, and 5 is spilled water hole, and 6 is top cover and runner decompression plate, and 7 is aeration valve, and 8 is floor inside draft cone, and 9 is draft cone outer side spiral groove.
Embodiment
Below in conjunction with embodiment shown in the drawings, the invention will be further described.
Embodiment 1:
As shown in Figure 2, decompression damping runner cone device of the present invention, it comprises the draft cone 1 being connected with the crown 3 of runner, and draft cone 1 inner side is welded with uniform floor 8, and draft cone 1 outside offers uniform spiral groove 9.The number of spilled water hole 5 is uniform 14, and the number of blade 2 is 13.Unit sense of rotation turns clockwise for seeing to overlook from generator toward water turbine direction.
As shown in Figure 3, described floor 8 is and is in tilted layout in draft cone 1, from draft cone 1 top, tilts to the bottom of draft cone 1 along unit sense of rotation, and angle of inclination is to become 30 ° of angles with runner medial axis.
Described floor 8 is concordant with bottom with the top of draft cone 1, and the width of floor 8 is 20mm, and the height of floor 8 is 20mm, and the number of floor 8 is uniform 8.
As shown in Figure 4, described spiral groove 9 tilts to the bottom of draft cone 1 from draft cone 1 top along unit sense of rotation, and the cornerite of spiral groove 9 is 180 °.
The width of described spiral groove 9 is 20mm, and the degree of depth of spiral groove 9 is 20mm, and the number of spiral groove 9 is uniform 7.
During Francis turbine operation, the floor of draft cone inner side is to the current pressurization of revealing from spilled water hole, and then increase vent flow, reduces the axial hydraulic thrust of unit; The spiral groove in draft cone outside drives near water flow rotary draft cone, and smooth-going current play the effect of water jet simultaneously, eliminate or weaken the pressure pulsation of draft tube, solves the problem that hydraulic vibration causes.
Finally, protection scope of the present invention is not limited to the above embodiments.Obviously, those skilled in the art can carry out various changes and distortion and not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and is out of shape interior.
Claims (5)
1. a decompression damping runner cone device, it is characterized in that: comprise the draft cone (1) being connected with the crown (3) of runner and the Diversion Plate (6) arranging and spilled water hole (5) on unit, described draft cone (1) inner side is welded with uniform floor (8), and described draft cone (1) outside offers uniform spiral groove (9).
2. decompression damping runner cone device according to claim 1, it is characterized in that: described floor (8) is and is in tilted layout in draft cone (1), from draft cone (1) top, tilt to the bottom of draft cone (1) along unit sense of rotation, angle of inclination is to become 20 °～40 ° angles with runner medial axis.
3. decompression damping runner cone device according to claim 1 and 2, it is characterized in that: the number of described floor (8) than spilled water hole (5) number half many 1, when spilled water hole (5) number is odd number, the number of floor (8) is that spilled water hole (5) number adds half of 1.
4. decompression damping runner cone device according to claim 1, it is characterized in that: described spiral groove (9) tilts to the bottom of draft cone (1) from draft cone (1) top along unit sense of rotation, when unit runner inlet diameter is in 4m, the cornerite of spiral groove (9) is 180 °, and when unit runner inlet diameter is greater than 4m, the cornerite of spiral groove (9) is 360 °.
5. according to the decompression damping runner cone device described in claim 1 or 4, it is characterized in that: the number of described spiral groove (9) than blade (2) number half many 1, when blade (2) number is odd number, the number of spiral groove (9) is that blade (2) number adds half of 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410285751.2A CN104121137A (en) | 2014-06-24 | 2014-06-24 | Pressure reduction and vibration damping runner cone device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410285751.2A CN104121137A (en) | 2014-06-24 | 2014-06-24 | Pressure reduction and vibration damping runner cone device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104121137A true CN104121137A (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410285751.2A Pending CN104121137A (en) | 2014-06-24 | 2014-06-24 | Pressure reduction and vibration damping runner cone device |
Country Status (1)
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| CN (1) | CN104121137A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121900A (en) * | 2016-08-19 | 2016-11-16 | 浙江景宁周氏机械有限公司 | High-efficient water wheel generator |
| CN106825657A (en) * | 2017-02-28 | 2017-06-13 | 哈尔滨善思科技有限责任公司 | A kind of method that 4 holes are made a call to based on the inclined operating mode hydraulic turbine draft cone of big flow |
| CN109139337A (en) * | 2018-10-17 | 2019-01-04 | 江西省莲花水轮机厂有限公司 | A kind of draft cone of the hydraulic turbine |
| CN109185007A (en) * | 2018-10-17 | 2019-01-11 | 江西省莲花水轮机厂有限公司 | A kind of hydraulic turbine |
| CN109386421A (en) * | 2018-10-17 | 2019-02-26 | 江西省莲花水轮机厂有限公司 | A kind of draft cone |
| CN109404203A (en) * | 2018-10-17 | 2019-03-01 | 江西省莲花水轮机厂有限公司 | A kind of draft cone on the hydraulic turbine |
| CN109404201A (en) * | 2018-10-17 | 2019-03-01 | 江西省莲花水轮机厂有限公司 | A kind of hydraulic turbine of reservoir |
| CN110173387A (en) * | 2019-05-16 | 2019-08-27 | 安徽昊星节能科技有限公司 | A method of the design of hydraulic turbine axial force is realized by adjusting sluicing bore dia |
| CN111271205A (en) * | 2020-03-10 | 2020-06-12 | 河海大学 | Water turbine runner with vortex inhibiting function and using method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB799013A (en) * | 1955-05-06 | 1958-07-30 | English Electric Co Ltd | Improvements in and relating to hydraulic reaction turbines |
| CN2172352Y (en) * | 1993-07-25 | 1994-07-20 | 黄国宏 | Hydrautic turbine revolving wheel with 2 impellers |
| CN102003216A (en) * | 2009-09-01 | 2011-04-06 | 吴中平 | Fluidic kinetic energy generating set |
| JP2011247160A (en) * | 2010-05-26 | 2011-12-08 | Mitsubishi Heavy Ind Ltd | Cone, rotary structure, and fluid machine |
| CN202768220U (en) * | 2012-08-14 | 2013-03-06 | 山东森玛格德节能设备有限公司 | Water turbine runner fixing device |
-
2014
- 2014-06-24 CN CN201410285751.2A patent/CN104121137A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB799013A (en) * | 1955-05-06 | 1958-07-30 | English Electric Co Ltd | Improvements in and relating to hydraulic reaction turbines |
| CN2172352Y (en) * | 1993-07-25 | 1994-07-20 | 黄国宏 | Hydrautic turbine revolving wheel with 2 impellers |
| CN102003216A (en) * | 2009-09-01 | 2011-04-06 | 吴中平 | Fluidic kinetic energy generating set |
| JP2011247160A (en) * | 2010-05-26 | 2011-12-08 | Mitsubishi Heavy Ind Ltd | Cone, rotary structure, and fluid machine |
| CN202768220U (en) * | 2012-08-14 | 2013-03-06 | 山东森玛格德节能设备有限公司 | Water turbine runner fixing device |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121900A (en) * | 2016-08-19 | 2016-11-16 | 浙江景宁周氏机械有限公司 | High-efficient water wheel generator |
| CN106121900B (en) * | 2016-08-19 | 2018-10-02 | 浙江景宁周氏机械有限公司 | High-efficient water wheel generator |
| CN106825657A (en) * | 2017-02-28 | 2017-06-13 | 哈尔滨善思科技有限责任公司 | A kind of method that 4 holes are made a call to based on the inclined operating mode hydraulic turbine draft cone of big flow |
| CN106825657B (en) * | 2017-02-28 | 2019-04-02 | 哈尔滨善思科技有限责任公司 | A method of 4 holes are made a call to based on the inclined operating condition hydraulic turbine draft cone of big flow |
| CN109404203A (en) * | 2018-10-17 | 2019-03-01 | 江西省莲花水轮机厂有限公司 | A kind of draft cone on the hydraulic turbine |
| CN109386421A (en) * | 2018-10-17 | 2019-02-26 | 江西省莲花水轮机厂有限公司 | A kind of draft cone |
| CN109185007A (en) * | 2018-10-17 | 2019-01-11 | 江西省莲花水轮机厂有限公司 | A kind of hydraulic turbine |
| CN109404201A (en) * | 2018-10-17 | 2019-03-01 | 江西省莲花水轮机厂有限公司 | A kind of hydraulic turbine of reservoir |
| CN109139337A (en) * | 2018-10-17 | 2019-01-04 | 江西省莲花水轮机厂有限公司 | A kind of draft cone of the hydraulic turbine |
| CN109404201B (en) * | 2018-10-17 | 2020-03-27 | 江西省莲花水轮机厂有限公司 | Water turbine for reservoir |
| CN109386421B (en) * | 2018-10-17 | 2020-03-27 | 江西省莲花水轮机厂有限公司 | Water drainage cone |
| CN109185007B (en) * | 2018-10-17 | 2020-04-14 | 江西省莲花水轮机厂有限公司 | Water turbine |
| CN109404203B (en) * | 2018-10-17 | 2020-04-28 | 江西省莲花水轮机厂有限公司 | Water discharge cone for water turbine |
| CN110173387A (en) * | 2019-05-16 | 2019-08-27 | 安徽昊星节能科技有限公司 | A method of the design of hydraulic turbine axial force is realized by adjusting sluicing bore dia |
| CN111271205A (en) * | 2020-03-10 | 2020-06-12 | 河海大学 | Water turbine runner with vortex inhibiting function and using method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141029 |