CN102650258A - Low head Kaplan type turbine on-cam device and method - Google Patents
Low head Kaplan type turbine on-cam device and method Download PDFInfo
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- CN102650258A CN102650258A CN2012101237299A CN201210123729A CN102650258A CN 102650258 A CN102650258 A CN 102650258A CN 2012101237299 A CN2012101237299 A CN 2012101237299A CN 201210123729 A CN201210123729 A CN 201210123729A CN 102650258 A CN102650258 A CN 102650258A
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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
The invention belongs to the hydraulic mechanical engineering, particularly a low head Kaplan type turbine on-cam device and a method. The low head Kaplan type turbine on-cam device and the method are characterized in that the on-cam device at least comprises the low head Kaplan type turbine; a four-way reversing valve (12) is connected between a blade pressure distributing valve (10) and a blade servomotor (11) of the low head Kaplan type turbine; the a1 end and the b1 end of the blade pressure distributing valve (10) are respectively connected with two ways of the four-way reversing valve (12); the a2 end and the b2 end of the blade servomotor (11) are respectively connected with the other two ways of the four-way reversing valve (12); and the four-way reversing valve (12) is used for controlling a valve plate of the four-way reversing valve (12) to carry out switching by a command. After the device and the method which are disclosed by the invention are adopted, the turbine can obtain stable performances in the shutdown process or in the process of transiting to the phase modulation working condition from the power generation working condition; and meanwhile, the device and the method are beneficial for reducing the shutdown and transition time.
Description
Technical field
The invention belongs to the hydraulic machinery engineering, particularly a kind of low water head kaplan type turbine on-cam device and method.
Background technique
Low water head kaplan type turbine regulating system all is a dual regulation, water turbine movable guide vane and runner bucket interlock just.Through testing and facts have proved, low head water turbine adopts dual regulation, can make water turbine obtain wideer high efficiency region, improves the overall efficiency of water turbine, utilizes the water ability to greatest extent, obtains the kinetic energy of maximum.Dual regulation is to regulate like this: along with the increase movable guide vane aperture increase of unit output, the application traffic of water turbine increases, and the angle of runner bucket increases, otherwise unit output reduces; The movable guide vane aperture reduces (closing) during shutdown, and the runner bucket angle reduces (minimum), otherwise during start.It is well-known regulating like this; But; Two problems are arranged, when normal operation, start, improve water turbine efficient, to obtain maximum energy be correct, and water turbine shut down or by generating operation mode excessively in phase modulation operating mode process; Water turbine has a water turbine operating mode to excessive period that turn one's coat pump operating mode and phase modulation are calmed the anger; At this moment this adjusting: 1, shutting down or by the period water turbine that generating operation mode carries out the transition to phase modulation operating mode (phase modulation is calmed the anger) the pump operating mode of all turning one's coat, guide vane opening reduces that the unit flow reduces in this case, to reduce be that the turn one's coat lift of pump operating mode increases to the runner bucket angle, so just becomes the principal element that vertical compressor emergency shutdown and transient process are lifted machine; Lift machine like Pueraria lobota state compressor emergency shutdown; I lift machine etc. by Syria's Di Shilin power station unit of institute's design in phase modulation is calmed the anger process, horizontal unit is increased axially back thrust, make the reduction of set steady property.2, at this moment unit need not obtain a lot of water can and need stop very soon or transient process is accomplished very soon; And all close to 0 aperture by above-mentioned adjusting water turbine movable guide vane; Runner bucket will reduce to the minimum angles position, can both make water turbine obtain maximum water during the course and can be unfavorable for shutting down the minimizing with transient time.
Summary of the invention
The purpose of this invention is to provide a kind of water turbine that can make and obtain stable performance shutting down or carry out the transition in the phase modulation operating mode process, help shutting down a kind of low water head kaplan type turbine on-cam device and method simultaneously with the minimizing of transient time by generating operation mode.
The objective of the invention is to realize like this; A kind of low water head kaplan type turbine on-cam device; It is characterized in that: comprise the low water head kaplan type turbine at least; Between the blade voltage distribution valve of low water head kaplan type turbine and blade servomotor, be connected four-way change-over valve; The a1 of blade voltage distribution valve end and b1 end are connected the two logical of four-way change-over valve respectively, and the a2 end and the b2 of blade servomotor holds and be connected other two of four-way change-over valve respectively and lead to, and four-way change-over valve switches through command control four-way change-over valve valve plate.
The a1 end of described blade voltage distribution valve and b1 end, the a2 end of blade servomotor is connected with the four-way mouth of four-way change-over valve through the interface pipe with the b2 end.
A kind of low water head kaplan type turbine joint method; At least comprise that command control four-way change-over valve valve plate switches; Under general start and the runnability, four-way change-over valve keeps original position promptly constant: promptly the valve plate of the four-way change-over valve a2 that moves to a1 end and the blade servomotor of blade voltage distribution valve holds and communicates; The b1 end of blade voltage distribution valve and the b2 end of blade servomotor communicate; Have only when converting the phase modulation operating mode into and close movable guide vane when compressor emergency shutdown or by generating operation mode; Send instruction through instruction system to four-way change-over valve; The a1 end of blade voltage distribution valve and the b2 end of blade servomotor are communicated, and the b1 end of blade voltage distribution valve and the a2 of blade servomotor communicate; At this moment the instruction that former joint sends for the blade voltage distribution valve is that the runner bucket angle reduces; Because the interface pipe at four-way change-over valve two ends moves through valve plate and has switched the position; The runner bucket angle becomes greatly on the contrary, blade voltage distribution valve performance characteristic is become disperse, and reaches maximum until the runner bucket angle;
Treat again afterwards that unit stops operating or after generating operation mode carries out the transition to phase modulation operating mode (phase modulation setting-out) and accomplish, by command control system through the automatic or manual design attitude that again two tubes is switched to former joint requirement of delaying time: promptly the valve plate of the four-way change-over valve a2 that moves to a1 end and the blade servomotor of blade voltage distribution valve holds and communicates; The b1 end of blade voltage distribution valve and the b2 end of blade servomotor communicate; Utilizing the blade master to join the convergence that at this moment valve works again, the runner bucket angle is returned to the angle of former joint requirement, is that the joint relation returns to original state.
Technique effect of the present invention is: can prevent that 1, the vertical water turbine generating set from lifting machine shutting down or be transformed in the phase modulation operating mode process by generating operation mode; Reduce horizontal hydrogenerator group current in these two processes the axial back thrust of unit is improved the stability of unit.2, help the shutdown of unit, increase braking moment; Help shortening the time that is transformed into phase modulation operating mode process by generating operation mode, make unit very fast excessively to steady state.3, simple in structure, safe and reliable.4, rationally utilized the joint that the work of blade main control valve is loose, the realization of holding back property is new relation.
Description of drawings
Below in conjunction with embodiment's accompanying drawing the present invention is described further:
Fig. 1 is an embodiment of the invention low water head kaplan type turbine on-cam device schematic representation;
Reference character is following:
1. centrifugal pendulum; 2. stator voltage distribution valve; 3. guide vane servomotor; 4. feedback rod; 5. follow-up; 6. buffer; 7. connecting lever; 8. joint cam; 9. roller; 10. blade voltage distribution valve; (a. fuel supply line, b. return tube), 11. blade servomotors; 12. four-way change-over valve.
Embodiment
As shown in Figure 1; A kind of low water head kaplan type turbine joint method; Be connected four-way change-over valve 12 between blade voltage distribution valve 10 and the blade servomotor 11; The a1 of blade voltage distribution valve 10 end and b1 end are connected the two logical of four-way change-over valve 12 respectively, the a2 end of blade servomotor 11 and b2 end be connected four-way change-over valve 12 respectively other two lead to, four-way change-over valve 12 switches through command control four-way change-over valve 12 valve plates; The a1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11 are communicated, the b1 end of blade voltage distribution valve 10 and the a2 of blade servomotor 11 are communicated; Can switch to the a1 end that makes blade voltage distribution valve 10 and the a2 of blade servomotor 11 equally and communicate, the b1 of blade voltage distribution valve 10 held and the b2 of blade servomotor 11 communicates.
The a1 end of blade voltage distribution valve 10 and b1 end, the a2 end of blade servomotor 11 is connected with the four-way mouth of four-way change-over valve 12 through the interface pipe with the b2 end.
Four-way change-over valve 12 is used to make the two tubes that is connected between blade voltage distribution valve 10 and the blade servomotor 11 to switch back and forth; Under general start and the runnability, four-way change-over valve 12 keeps original positions promptly constant: promptly the valve plate of four-way change-over valve 12 a2 that moves to a1 end and the blade servomotor 11 of blade voltage distribution valve 10 holds and communicates; The b1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11 communicate.
Have only when converting the phase modulation operating mode into and close movable guide vane when compressor emergency shutdown or by generating operation mode; Send instruction for four-way change-over valve 12 through instruction system; The a1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11 are communicated, and the b1 end of blade voltage distribution valve 10 and the a2 of blade servomotor 11 communicate.At this moment the instruction that former joint sends for blade voltage distribution valve 10 is that the runner bucket angle reduces (if instruction is obvious inadequately; When sending instruction for four-way change-over valve 12, gives command control system 10 1 instructions that reduce the runner bucket angle of blade voltage distribution valve); Because the interface pipe at four-way change-over valve 12 two ends moves through valve plate and has switched the position; The runner bucket angle becomes greatly on the contrary, blade voltage distribution valve 10 performance characteristic is become disperse, and reaches maximum until the runner bucket angle.
Treat again afterwards that unit stops operating or after the phase modulation setting-out accomplishes, by command control system through the automatic or manual design attitude that again two tubes is switched to former joint requirement of delaying time: promptly the valve plate of four-way change-over valve 12 a2 that moves to a1 end and the blade servomotor 11 of blade voltage distribution valve 10 holds and communicates; The b1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11 communicate.The convergence of utilizing blade voltage distribution valve 10 at this moment to work again returns to the angle of former joint requirement with the runner bucket angle, is that the joint relation returns to original state.
Four-way change-over valve 12 supplies water just recoiling etc. in refrigeration, hydraulic pressure, water turbine and has all obtained using widely, is not described further here.
The low water head kaplan type turbine is a dual regulation, and the joint between the aperture of movable guide vane and the angle of runner bucket has two kinds, and a kind of is mechanical joint (as shown in Figure 1), carries out joint through mechanical connections such as connecting lever 7, joint cam 8, rollers 9.Another kind is electric joint, is different parameters is set and carried out joint through the mathematical simulation calculation programming Control, has been replaced mechanical connections such as connecting lever 7 among Fig. 1, joint cam 8, roller 9 by displacement transducer, processing unit, hydraulic pressure switching mechanism etc.
Centrifugal pendulum 1 rotates with water turbine synchronously, by the rotating speed of centrifugal pendulum 1 sensing unit, if when generating unit speed departs from setting value, sends regulated signal.Stator voltage distribution valve 2 is controlled opening or closing of guide vane servomotor 3 or is stopped.Guide vane servomotor 3 is used to control the aperture of movable guide vane.Feedback rod 4, follow-up 5, buffer 6 are used to accomplish the feedback of speed control system, and effect is a working stability of keeping regulating system.Connecting lever 7, joint cam 8, roller 9 are joint mechanisms of speed control system, and effect is the interaction that realizes between movable guide vane and the runner bucket.Blade voltage distribution valve 10 is to control opening or closing or stopping of blade servomotor 11.Blade servomotor 11 is rotation angles of control runner bucket.
The working principle of speed control system: centrifugal pendulum 1 is measured the rotating speed of unit; If rotating speed is greater than setting value; The power load of unit reduces; Centrifugal pendulum 1 just moves down through bindiny mechanism's operation stator voltage distribution valve 2 spools, controls guide vane servomotor 3 the movable guide vane aperture is turned down, and it is that speed control system is stabilized in new state that reponse system (feedback rod 4, follow-up 5, buffer 6) is gone back this signal feed back that turns down again.At this moment joint mechanism (connecting lever 7, joint cam 8, roller 9) is that blade voltage distribution valve 10 spools are moved down; Operation blade servomotor 11 is that the runner bucket angle is reduced to and the corresponding angle of movable guide vane aperture, if otherwise the generating unit speed that centrifugal pendulum 1 is measured less than setting value.
Start moves up through operation stator voltage distribution valve 2 spools, makes guide vane servomotor 3 open movable guide vane, and the blade voltage distribution valve 10 control blade servomotors 11 by joint mechanism reach the runner bucket angle and movable guide vane aperture respective angles thereupon.
Shut down (comprising that the phase modulation unit is by the transient process of generating operation mode to the phase modulation operating mode); Move down through operation stator voltage distribution valve 2 spools; Make guide vane servomotor 3 close movable guide vane, be that blade voltage distribution valve 10 spools will reduce the runner bucket angle downwards by joint mechanism thereupon, and four-way change-over valve 12 communicates the a1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11; The b1 end of blade voltage distribution valve 10 and the a2 of blade servomotor 11 communicate, and reach maximum until the runner bucket angle.Treat that afterwards unit stops operating or generating operation mode carries out the transition to after phase modulation operating mode (phase modulation setting-out) completion again, two tubes is switched to the design attitude of former joint requirement again: promptly the a2 end of the a1 of blade voltage distribution valve 10 end and blade servomotor 11 communicates; The b2 end of the b1 of blade voltage distribution valve 10 end and blade servomotor 11 communicates, and the runner bucket angle is returned to the angle of former joint requirement, is that joint concerns original state that returns to.
The present invention concerns on the basis water turbine shut down and have the unit of phase modulation requirement to carry out the transition to phase modulation operating mode process change by generating operation mode at former joint; Movable guide vane is when any aperture is closed; Require the runner bucket angle to increase to maximum angle; Treat that subsequently unit stops operating or generating operation mode carries out the transition to after phase modulation operating mode (phase modulation setting-out) completion, the runner bucket angle is returned to the angle of former joint requirement again, other operating modes keep former joint relation constant; Small leaf angle start just, big blade angle shutdown.
Parts that present embodiment is not described in detail and structure belong to well-known components and the common structure or the conventional means of the industry, here not narration one by one.
Claims (3)
1. low water head kaplan type turbine on-cam device; It is characterized in that: comprise the low water head kaplan type turbine at least; Between the blade voltage distribution valve (10) of low water head kaplan type turbine and blade servomotor (11), be connected four-way change-over valve (12); The a1 end of blade voltage distribution valve (10) is connected two of four-way change-over valve (12) respectively with the b1 end and leads to; The a2 end of blade servomotor (11) is connected other two of four-way change-over valve (12) respectively with the b2 end and leads to, and four-way change-over valve (12) switches through command control four-way change-over valve (12) valve plate.
2. a kind of low water head kaplan type turbine on-cam device according to claim 1; It is characterized in that: the a1 end of described blade voltage distribution valve (10) and b1 end, the a2 end of blade servomotor (11) is connected through the four-way mouth of interface pipe with four-way change-over valve (12) with the b2 end.
3. low water head kaplan type turbine joint method; It is characterized in that: comprise that at least command control four-way change-over valve (12) valve plate switches; Under general start and the runnability, four-way change-over valve (12) keeps original position promptly constant: promptly the valve plate of four-way change-over valve (12) a2 that moves to a1 end and the blade servomotor (11) of blade voltage distribution valve (10) holds and communicates; The b1 end of blade voltage distribution valve (10) and the b2 end of blade servomotor (11) communicate; Have only when converting the phase modulation operating mode into and close movable guide vane when compressor emergency shutdown or by generating operation mode; Send instruction for four-way change-over valve (12) through instruction system; The a1 end of blade voltage distribution valve (10) and the b2 end of blade servomotor (11) are communicated, and the b1 end of blade voltage distribution valve (10) and the a2 of blade servomotor (11) communicate; At this moment the instruction that former joint sends for blade voltage distribution valve (10) is that the runner bucket angle reduces; Because the interface pipe at four-way change-over valve (12) two ends moves through valve plate and has switched the position; It is big that the runner bucket angle becomes on the contrary; Blade voltage distribution valve (10) performance characteristic is become disperse, reach maximum until the runner bucket angle;
Treat again afterwards that unit stops operating or after generating operation mode carries out the transition to phase modulation operating mode (phase modulation setting-out) and accomplish, by command control system through the automatic or manual design attitude that again two tubes is switched to former joint requirement of delaying time: promptly the valve plate of four-way change-over valve (12) a2 that moves to a1 end and the blade servomotor (11) of blade voltage distribution valve (10) holds and communicates; The b1 end of blade voltage distribution valve (10) and the b2 end of blade servomotor (11) communicate; Utilizing the blade master to join the convergence that valve (10) is at this moment worked again, the runner bucket angle is returned to the angle of former joint requirement, is that the joint relation returns to original state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210123729.9A CN102650258B (en) | 2012-04-25 | 2012-04-25 | Low head Kaplan type turbine on-cam device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210123729.9A CN102650258B (en) | 2012-04-25 | 2012-04-25 | Low head Kaplan type turbine on-cam device and method |
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| Publication Number | Publication Date |
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| CN102650258A true CN102650258A (en) | 2012-08-29 |
| CN102650258B CN102650258B (en) | 2014-06-04 |
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| CN201210123729.9A Active CN102650258B (en) | 2012-04-25 | 2012-04-25 | Low head Kaplan type turbine on-cam device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762340A (en) * | 2016-12-02 | 2017-05-31 | 国家电网公司 | A kind of hydraulic turbine servomotor intelligence leak detection system and its method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2614232C2 (en) * | 2014-03-31 | 2017-03-23 | Общество с ограниченной ответственностью "Ракурс-инжиниринг" | Control method of adjustable-blade turbine impeller by servomotor |
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| JPH04183976A (en) * | 1990-11-15 | 1992-06-30 | Mitsubishi Heavy Ind Ltd | Control device of turbine discharge |
| JP2001207944A (en) * | 2000-01-24 | 2001-08-03 | Mitsubishi Heavy Ind Ltd | Speed governor of water turbine for power generator |
| CN101265871A (en) * | 2008-05-07 | 2008-09-17 | 天津市天发重型水电设备制造有限公司 | Electrohydraulic synchronous cylinder type valve servo synchronous control system |
| CN202560452U (en) * | 2012-04-25 | 2012-11-28 | 中国水电顾问集团西北勘测设计研究院 | Low water head slurry rotating type water turbine joint device |
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Patent Citations (6)
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| JPS5458154A (en) * | 1977-10-19 | 1979-05-10 | Hitachi Ltd | Operation mefthod for hydraulic power plant |
| JPH04183976A (en) * | 1990-11-15 | 1992-06-30 | Mitsubishi Heavy Ind Ltd | Control device of turbine discharge |
| JP2744693B2 (en) * | 1990-11-15 | 1998-04-28 | 三菱重工業株式会社 | Control device for water turbine flow |
| JP2001207944A (en) * | 2000-01-24 | 2001-08-03 | Mitsubishi Heavy Ind Ltd | Speed governor of water turbine for power generator |
| CN101265871A (en) * | 2008-05-07 | 2008-09-17 | 天津市天发重型水电设备制造有限公司 | Electrohydraulic synchronous cylinder type valve servo synchronous control system |
| CN202560452U (en) * | 2012-04-25 | 2012-11-28 | 中国水电顾问集团西北勘测设计研究院 | Low water head slurry rotating type water turbine joint device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106762340A (en) * | 2016-12-02 | 2017-05-31 | 国家电网公司 | A kind of hydraulic turbine servomotor intelligence leak detection system and its method |
| CN106762340B (en) * | 2016-12-02 | 2019-02-26 | 国家电网公司 | A kind of hydraulic turbine servomotor intelligence leak detection system and its method |
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| CN102650258B (en) | 2014-06-04 |
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Owner name: HYDROCHINA XIBEI ENGINEERING CORPORATION Free format text: FORMER NAME: NORTHWEST HYDROELECTRIC INVESTIGATION + DESIGN INSTITUTE OF CHINA HYDROPOWER ENGINEERING CONSULTING Owner name: CHINA ELECTRIC POWER CONSTRUCTION GROUP NORTHWEST Free format text: FORMER NAME: HYDROCHINA XIBEI ENGINEERING CORPORATION |
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Address after: 710065 Shaanxi Province, Xi'an City Road eight No. 18 survey and Design Institute of the northwest department of science and technology Patentee after: NORTHWEST HYDRO CONSULTING ENGINEERS, CHECC Address before: 710065 Shaanxi Province, Xi'an City Road eight No. 18 survey and Design Institute of the northwest department of science and technology Patentee before: Northwest Hydro Consulting Engineers, CHECC |
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Address after: 710065 Shaanxi Province, Xi'an City Road eight No. 18 Patentee after: POWERCHINA NORTHWEST ENGINEERING Co.,Ltd. Address before: 710065 Shaanxi Province, Xi'an City Road eight No. 18 survey and Design Institute of the northwest department of science and technology Patentee before: NORTHWEST HYDRO CONSULTING ENGINEERS, CHECC |