CN102650258B - 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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- CN102650258B CN102650258B CN201210123729.9A CN201210123729A CN102650258B CN 102650258 B CN102650258 B CN 102650258B CN 201210123729 A CN201210123729 A CN 201210123729A CN 102650258 B CN102650258 B CN 102650258B
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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 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 is all dual regulation, namely water turbine movable guide vane and runner bucket interlock.By testing and facts have proved, low head water turbine adopts dual regulation, can make water turbine obtain wider high efficiency region, improves the overall efficiency of water turbine, utilizes to greatest extent water energy, obtains maximum kinetic energy.Dual regulation is to regulate like this: along with the increase movable guide vane aperture of unit output increases, the application traffic of water turbine increases, and the angle of runner bucket increases, otherwise unit output reduces; When shutdown, movable guide vane aperture reduces (closing), and runner bucket angle reduces (minimum), otherwise when start.It is well-known regulating like this, but, there are two problems, in normal operation, when start, improve the efficiency of water turbine, it is correct obtaining maximum energy, and water turbine shut down or by generating operation mode excessively in working conditions of phrase modulation process, the excessive period that water turbine has a water turbine operating mode to calm the anger to anti-pump operating condition and phase modulation, at this moment this adjusting: 1, shutting down or having anti-pump operating condition by the period water turbine that generating operation mode is transitioned into working conditions of phrase modulation (phase modulation is calmed the anger), guide vane opening reduces unit flow and reduces in this case, it is that the lift of anti-pump operating condition increases that runner bucket angle reduces, so just become vertical compressor emergency shutdown and transient process and lift the principal element of machine, as Pueraria lobota state compressor emergency shutdown is lifted machine, I lift machine etc. by the Syria Di Shilin power station unit of institute's design in phase modulation is calmed the anger process, horizontal unit is increased to axial back pressure, set steady is reduced.2, at this moment unit does not need to obtain a lot of water energy and needs stop very soon or transient process completes very soon; and all close to 0 aperture by above-mentioned adjusting water turbine movable guide vane; runner bucket will reduce to minimum angles position, can make during the course water turbine obtain the minimizing that maximum water can be unfavorable for shutdown and transient time.
Summary of the invention
The object of this invention is to provide a kind of water turbine that can make and obtain stable performance in shutting down or being transitioned into working conditions of phrase modulation process by generating operation mode, be conducive to a kind of low water head kaplan type turbine on-cam device and the method for the minimizing of shutdown and transient time simultaneously.
The object of the present invention is achieved like this, a kind of low water head kaplan type turbine on-cam device, it is characterized in that: at least comprise low water head kaplan type turbine, 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 end of blade voltage distribution valve is connected respectively two of four-way change-over valve with b1 end and leads to, the a2 end of blade servomotor is connected respectively other two of four-way change-over valve with b2 end and leads to, and four-way change-over valve switches by instruction 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 by interface pipe with b2 end.
A kind of low water head kaplan type turbine joint method, at least comprise that instruction control four-way change-over valve valve plate switches, under general start and runnability, four-way change-over valve keeps original position constant: the valve plate of four-way change-over valve moves to the a1 end of blade voltage distribution valve and the a2 of blade servomotor and holds and communicate; The b1 end of blade voltage distribution valve and the b2 end of blade servomotor communicate; Only have when being converted to working conditions of phrase modulation and closing movable guide vane when compressor emergency shutdown or by generating operation mode, send instruction by 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 to blade voltage distribution valve is that runner bucket angle reduces, because the interface pipe at four-way change-over valve two ends is moved and switched position by valve plate, runner bucket angle becomes greatly on the contrary, blade voltage distribution valve performance characteristic is become and disperse, until runner bucket angle reaches maximum;
Treat again afterwards that unit stops operating or after generating operation mode is transitioned into working conditions of phrase modulation (phase modulation setting-out) and completes, by command control system by the automatic or manual design attitude that again two tubes is switched to former joint requirement of time delay: the valve plate of four-way change-over valve moves to the a1 end of blade voltage distribution valve and the a2 of blade servomotor and holds and communicate; The b1 end of blade voltage distribution valve and the b2 end of blade servomotor communicate; Recycling blade master joins the convergence that at this moment valve works, and runner bucket angle is returned to the angle of former joint requirement, is that joint relation returns to original state.
Technique effect of the present invention is: 1, can prevent vertical water turbine generating set shut down or be transformed into working conditions of phrase modulation process by generating operation mode in lift machine; reduce horizontal hydrogenerator group current axial back pressure to unit in these two processes, improve the stability of unit.2, be conducive to the shutdown of unit, increase braking moment; Be conducive to shorten the time that is transformed into working conditions of phrase modulation process by generating operation mode, make unit very fast excessively to steady state.3, simple in structure, safe and reliable.4, rationally utilized that the work of blade main control valve is fallen apart, holding back property realizes new joint relation.
Accompanying drawing explanation
Below in conjunction with embodiment's accompanying drawing, the invention will be further described:
Fig. 1 is embodiment of the present invention low water head kaplan type turbine on-cam device schematic diagram;
Reference character is as follows:
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 valves.
embodiment
As shown in Figure 1, a kind of low water head kaplan type turbine joint method, between blade voltage distribution valve 10 and blade servomotor 11, be connected four-way change-over valve 12, the a1 end of blade voltage distribution valve 10 is connected respectively two of four-way change-over valve 12 with b1 end and leads to, the a2 end of blade servomotor 11 is connected respectively another two of four-way change-over valve 12 with b2 end and leads to, four-way change-over valve 12 switches by instruction 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 equally the a1 end of blade voltage distribution valve 10 and the a2 of blade servomotor 11 are communicated, the b1 end of blade voltage distribution valve 10 and the b2 of blade servomotor 11 are communicated.
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 by interface pipe with b2 end.
Four-way change-over valve 12 is for switching back and forth the two tubes being connected between blade voltage distribution valve 10 and blade servomotor 11, under general start and runnability, four-way change-over valve 12 keeps original position constant: the valve plate of four-way change-over valve 12 moves to the a1 end of blade voltage distribution valve 10 and the a2 of blade servomotor 11 and holds and communicate; The b1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11 communicate.
Only have when being converted to working conditions of phrase modulation and closing movable guide vane when compressor emergency shutdown or by generating operation mode; send instruction by instruction system to four-way change-over valve 12; 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 to blade voltage distribution valve 10 is that runner bucket angle reduces (if instruction is obvious not, when sending instruction to four-way change-over valve 12, command control system reduce the instruction of runner bucket angle to 10 1 of blade voltage distribution valves), because the interface pipe at four-way change-over valve 12 two ends is moved and switched position by valve plate, it is large that runner bucket angle becomes on the contrary, blade voltage distribution valve 10 performance characteristic are become and disperse, until runner bucket angle reaches maximum.
Treat again afterwards that unit stops operating or after phase modulation setting-out completes, by command control system by the automatic or manual design attitude that again two tubes is switched to former joint requirement of time delay: the valve plate of four-way change-over valve 12 moves to the a1 end of blade voltage distribution valve 10 and the a2 of blade servomotor 11 and holds and communicate; The b1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11 communicate.Recycling the convergence that at this moment blade voltage distribution valve 10 works, runner bucket angle is returned to the angle of former joint requirement, is that joint relation returns to original state.
Four-way change-over valve 12 supplies water just recoiling etc. in refrigeration, hydraulic pressure, water turbine and is all widely used, and is not described further here.
Low water head kaplan type turbine is dual regulation, and the joint between the aperture of movable guide vane and the angle of runner bucket has two kinds, and one is mechanical joint (as shown in Figure 1), carries out joint by 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 by mathematical simulation calculation programming Control, has been replaced the mechanical connections such as connecting lever 7 in Fig. 1, joint cam 8, roller 9 by displacement transducer, processing unit, hydraulic rotation converting mechanism etc.
Centrifugal pendulum 1 is synchronizeed and is rotated with water turbine, 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 manipulates opening or closing of guide vane servomotor 3 or stops.Guide vane servomotor 3 is for controlling the aperture of movable guide vane.Feedback rod 4, follow-up 5, buffer 6 are for completing the feedback of speed control system, and effect is the working stability that maintains regulating system.Connecting lever 7, joint cam 8, roller 9 are joint mechanisms of speed control system, and effect is the interaction realizing between movable guide vane and runner bucket.Blade voltage distribution valve 10 is opening or closing or stopping of manipulation blade servomotor 11.Blade servomotor 11 is rotation angles of controlling 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 operates stator voltage distribution valve 2 spools by bindiny mechanism and moves down, manipulation guide vane servomotor 3 turns down movable guide vane aperture, and it is that speed control system is stabilized in new state that the signal feed back that reponse system (feedback rod 4, follow-up 5, buffer 6) turns down this is again gone back.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 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 is less than setting value.
Start moves up by operation stator voltage distribution valve 2 spools, makes guide vane servomotor 3 open movable guide vane, controls blade servomotor 11 thereupon runner bucket angle is reached and movable guide vane aperture respective angles by the blade voltage distribution valve 10 of joint mechanism.
Shut down (comprise phase modulation unit by generating operation mode the transient process to working conditions of phrase modulation); move down by operation stator voltage distribution valve 2 spools; make guide vane servomotor 3 close movable guide vane; that blade voltage distribution valve 10 spools will reduce runner bucket angle downwards by joint mechanism thereupon; 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, until runner bucket angle reaches maximum.Treat again afterwards that unit stops operating or after generating operation mode is transitioned into working conditions of phrase modulation (phase modulation setting-out) and completes, then two tubes is switched to the design attitude of former joint requirement: the a2 of the a1 of blade voltage distribution valve 10 end and blade servomotor 11 holds and communicates; The b1 end of blade voltage distribution valve 10 and the b2 end of blade servomotor 11 communicate, and runner bucket angle are returned to the angle of former joint requirement, are that joint relation returns to original state.
The present invention is related on basis water turbine to be shut down and have the unit of phase modulation requirement to be transitioned into working conditions of phrase modulation process change by generating operation mode at former joint; movable guide vane is when any aperture is closed; require runner bucket angle to increase to maximum angle; treat subsequently that unit stops operating or after generating operation mode is transitioned into working conditions of phrase modulation (phase modulation setting-out) and completes; again runner bucket angle is returned to the angle of former joint requirement; other operating modes keep former joint relation constant; namely small leaf angle start, large blade angle shutdown.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (2)
1. a low water head kaplan type turbine joint method, it is characterized in that: at least comprise that instruction control four-way change-over valve (12) valve plate switches, under general start and runnability, four-way change-over valve (12) keeps original position constant: the valve plate of four-way change-over valve (12) moves to the a1 end of blade voltage distribution valve (10) and the a2 of blade servomotor (11) and holds and communicate; The b1 end of blade voltage distribution valve (10) and the b2 end of blade servomotor (11) communicate; Only have when being converted to working conditions of phrase modulation and closing movable guide vane when compressor emergency shutdown or by generating operation mode, send instruction by instruction system to four-way change-over valve (12), 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 to blade voltage distribution valve (10) is that runner bucket angle reduces, because the interface pipe at four-way change-over valve (12) two ends is moved and switched position by valve plate, it is large that runner bucket angle becomes on the contrary, blade voltage distribution valve (10) performance characteristic is become and disperse, until runner bucket angle reaches maximum;
Treat again afterwards that unit stops operating or after generating operation mode is transitioned into working conditions of phrase modulation and completes, by command control system by the automatic or manual design attitude that again two tubes is switched to former joint requirement of time delay: the valve plate of four-way change-over valve (12) moves to the a1 end of blade voltage distribution valve (10) and the a2 of blade servomotor (11) and holds and communicate; The b1 end of blade voltage distribution valve (10) and the b2 end of blade servomotor (11) communicate; Recycling the convergence that blade voltage distribution valve (10) is at this moment worked, runner bucket angle is returned to the angle of former joint requirement, is that joint relation returns to original state;
The device that the method adopts is: low water head kaplan type turbine on-cam device, at least comprise low water head kaplan type turbine, 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 respectively two of four-way change-over valve (12) with b1 end and leads to, the a2 end of blade servomotor (11) is connected respectively other two of four-way change-over valve (12) with b2 end and leads to, and four-way change-over valve (12) switches by instruction control four-way change-over valve (12) valve plate.
2. a kind of low water head kaplan type turbine joint method 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 with the four-way mouth of four-way change-over valve (12) by interface pipe with b2 end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210123729.9A CN102650258B (en) | 2012-04-25 | 2012-04-25 | Low head Kaplan type turbine on-cam device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210123729.9A CN102650258B (en) | 2012-04-25 | 2012-04-25 | Low head Kaplan type turbine on-cam device and method |
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| CN102650258A CN102650258A (en) | 2012-08-29 |
| CN102650258B true CN102650258B (en) | 2014-06-04 |
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Cited By (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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| JP2744693B2 (en) * | 1990-11-15 | 1998-04-28 | 三菱重工業株式会社 | Control device for water turbine flow |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5458154A (en) * | 1977-10-19 | 1979-05-10 | Hitachi Ltd | Operation mefthod for hydraulic power plant |
| JP2001207944A (en) * | 2000-01-24 | 2001-08-03 | Mitsubishi Heavy Ind Ltd | Speed governor of water turbine for power generator |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2744693B2 (en) * | 1990-11-15 | 1998-04-28 | 三菱重工業株式会社 | Control device for water turbine flow |
| 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 |
Non-Patent Citations (3)
| Title |
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| JP平4-183976A 1992.06.30 |
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| JP特开2001-207944A 2001.08.03 |
Cited By (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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| CN102650258A (en) | 2012-08-29 |
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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 |