CN202659411U - Joint adjusting device for low-water head Kaplan turbine - Google Patents
Joint adjusting device for low-water head Kaplan turbine Download PDFInfo
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- CN202659411U CN202659411U CN2012201797633U CN201220179763U CN202659411U CN 202659411 U CN202659411 U CN 202659411U CN 2012201797633 U CN2012201797633 U CN 2012201797633U CN 201220179763 U CN201220179763 U CN 201220179763U CN 202659411 U CN202659411 U CN 202659411U
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- voltage distribution
- valve
- blade
- distribution valve
- joint
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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
Abstract
The utility model belongs to the hydraulic mechanical engineering and in particular relates to a joint adjusting device for a low-water head Kaplan turbine. The device comprises a blade distributing valve (10) connected with a joint mechanism, wherein two ways of a four-way reversing valve (12) is connected between an oil supply pipe and the oil supply way of the blade distributing valve (10); and the other two ways of the four-way reversing valve (12) is connected between an oil return pipe and an oil return way of the blade distributing valve (10). The device and the method provided by the utility model are capable of stabilizing the turbine in performance at stop or in the process of transition from the power-generation working condition to the phase-adjustment working condition, and simultaneously conductive to reducing the stop time and the transition time.
Description
Technical field
The utility model belongs to the hydraulic machinery engineering, particularly a kind of low water head Kaplan turbine joint controlling device.
Background technique
Low water head Kaplan turbine regulating system all is 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 the water energy, obtains maximum kinetic energy.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, in normal operation, improve the efficient of water turbine during start, it is correct obtaining maximum energy, and water turbine shut down or by generating operation mode excessively in the working conditions of phrase modulation 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 is transitioned into working conditions of phrase modulation (phase modulation is calmed the anger) the pump operating mode of turning one's coat, guide vane opening reduces the unit flow and reduces in this case, it is that the turn one's coat lift of pump operating mode increases that the runner bucket angle reduces, so just become vertical compressor emergency shutdown and transient process and lift the principal element of machine, lift machine such as 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 axial back pressure.Make the set steady reduction.2, at this moment unit does not need to obtain a lot of water energy and needs stop very soon or transient process is finished 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 be that water turbine obtains maximum water and can be unfavorable for shutting down minimizing with transient time during the course.
The model utility content
The purpose of this utility model provides a kind of water turbine that can make and obtains stable performance in the working conditions of phrase modulation process shutting down or be transitioned into by generating operation mode, is beneficial to simultaneously to shut down and a kind of low water head Kaplan turbine joint controlling device and the method for the minimizing of transient time.
The purpose of this utility model is to realize like this, a kind of low water head Kaplan turbine joint controlling device, it is characterized in that: comprise at least the blade voltage distribution valve that joint mechanism connects, connect two of four-way change-over valve between the fuel supply line of blade voltage distribution valve and the oil feeding line and lead to, connect other two of four-way change-over valve between the return tube of blade voltage distribution valve and the oil return circuit and lead to.
The fuel supply line a of described blade voltage distribution valve and oil return circuit b1 lead to logical by four-way change-over valve two, return tube b and oil feeding line a1 lead to logical by four-way change-over valve two.
The fuel supply line a of described blade voltage distribution valve and oil feeding line a1 lead to logical by four-way change-over valve two, the return tube b of blade voltage distribution valve and oil return circuit b1 lead to logical by four-way change-over valve other two.
A kind of low water head Kaplan turbine joint controlling device, it is characterized in that: comprise at least the blade voltage distribution valve that joint mechanism connects, fuel supply line a and the oil feeding line a1 of blade voltage distribution valve lead to logical by two of four-way change-over valve, the return tube b of blade voltage distribution valve and oil return circuit b1 lead to logical by other two of four-way change-over valve, it is logical that control four-way change-over valve valve plate can make the fuel supply line a of blade voltage distribution valve and oil return circuit b1 lead to by four-way change-over valve two, and return tube b and oil feeding line a1 lead to logical by four-way change-over valve two.Also can controlling the four-way change-over valve valve plate, that the fuel supply line a of blade voltage distribution valve and oil feeding line a1 are led to by four-way change-over valve two is logical again, and the return tube b of blade voltage distribution valve and oil return circuit b1 lead to logical by four-way change-over valve other two.
Working principle of the present utility model and advantage are; joint relation by changing low water head Kaplan turbine dual regulation is namely: concern on the basis the water turbine shutdown and have the unit of phase modulation requirement to be transitioned into the working conditions of phrase modulation process change by generating operation mode at former joint to be; movable guide vane is when any aperture is closed; require the runner bucket angle to increase also and can 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 finishes; again the 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.Such change: 1; water turbine is transitioned in working conditions of phrase modulation (phase modulation setting-out) process in shutdown or generating operation mode; along with the aperture of movable guide vane reduces to have by the process of water turbine operating mode to the pump operating mode of turning one's coat; at this moment the unit stator turns down; flow reduces in the situation of blade wide-angle increase; the pumping head that can reduce to turn one's coat is (well-known under the condition with rotating speed; the water pump blade exit angle is little; flow is little; lift is high); reduce tail water to the active force of runner bucket; be conducive to prevent that vertical unit from lifting that machine occurs and the minimizing of the axial back pressure of horizontal unit, the stability of raising unit.2, the water that relatively obtains of water turbine can will reduce in both cases, and stretch downwards at the movable position when and for example descending with aircraft on the wing, can increase current to the braking force of blade, is conducive to shutdown, is conducive to shorten the time of transient process for the phase modulation unit.3, simple in structure, safe and reliable.4, rationally utilized the joint that the work of blade main control valve is fallen apart, the realization of holding back property is new relation.
After fuel supply line a and the return tube b switching position, the blade voltage distribution valve high-voltage oil cavity that can be former fuel supply line a access becomes the blade voltage distribution valve low pressure oil pocket that former return tube b accesses, the blade voltage distribution valve low pressure oil pocket of former return tube b access becomes the blade voltage distribution valve high-voltage oil cavity of former fuel supply line a access, being that the blade voltage distribution valve is stressed a bit changes, can be not influential from principle, but the transformation to existing speed control system, former design does not have this requirement to the blade voltage distribution valve, so, use this patent and will note this point.
Description of drawings
The utility model is described in further detail below in conjunction with embodiment's accompanying drawing:
Fig. 1 is the utility model embodiment machinery joint schematic diagram;
Fig. 2 is the utility model embodiment four-way change-over valve pipeline connection 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 servomotor; 12. four-way change-over valve; A1. oil feeding line; B1. oil return circuit.
Embodiment
Such as Fig. 1, shown in 2, a kind of low water head Kaplan turbine joint controlling device, fuel supply line a and the oil feeding line a1 of blade voltage distribution valve 10 lead to logical by two of four-way change-over valve 12, the return tube b of blade voltage distribution valve 10 and oil return circuit b1 lead to logical by other two of four-way change-over valve 12, control four-way change-over valve 12 valve plates can make the fuel supply line a of blade voltage distribution valve 10 and oil return circuit b1 two lead to logical, return tube b and oil feeding line a1 two lead to logical, also can controlling four-way change-over valve 12, that the fuel supply line a of blade voltage distribution valve 10 and oil feeding line a1 two are led to is logical again, and return tube b and the oil return circuit b1 two of blade voltage distribution valve 10 lead to logical.
Under general start and the runnability, four-way change-over valve 12 remains on the fuel supply line a of blade voltage distribution valve 10 and oil feeding line a1 and leads to logically by two of four-way change-over valve 12, and the return tube b of blade voltage distribution valve 10 and oil return circuit b1 lead to logical by other two of four-way change-over valve 12.
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 command control system to four-way change-over valve 12 and will make the fuel supply line a of blade voltage distribution valve 10 switch to oil return circuit b1, return tube b switches to oil feeding line a1.At this moment, the instruction that former joint sends to blade voltage distribution valve 10 is that blade angle reduces (if instruction is obvious not, when command control system sends instruction to four-way change-over valve 12, give 10 1 instructions that reduce blade angle of blade voltage distribution valve), because fuel supply line a, return tube b have switched the position, blade angle becomes greatly on the contrary, blade voltage distribution valve 10 performance characteristic is become disperse, until blade angle reaches maximum.
Afterwards, treat again that unit stops operating or after generating operation mode is converted to working conditions of phrase modulation (phase modulation setting-out) and finishes, automatic or manual again with fuel supply line a by time-delay by command control system, return tube b switches to the design attitude of former joint requirement, the fuel supply line a and the oil feeding line a1 that are blade voltage distribution valve 10 lead to logical by two of four-way change-over valve 12, the return tube b of blade voltage distribution valve 10 and oil return circuit b1 lead to logical by other two of four-way change-over valve 12, the convergence that at this moment recycling blade voltage distribution valve 10 works, the runner bucket angle being returned to the angle of former joint requirement, is that the joint relation returns to original state.
The low water head Kaplan turbine is 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 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 the mathematical simulation calculation programming Control, has been replaced the mechanical connections such as connecting lever 7 among Fig. 1, joint cam 8, roller 9 by displacement transducer, processing unit, hydraulic rotation converting mechanism etc.
During water turbine work, centrifugal pendulum 1 rotates synchronously 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 is controlled opening or closing of guide vane servomotor 3 or is stopped.Guide vane servomotor 3 is used for the aperture of control movable guide vane.Feedback rod 4, follow-up 5, buffer 6 are used for finishing the feedback of speed control system, and effect is the 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 by bindiny mechanism's operation stator voltage distribution valve 2 spools, control guide vane servomotor 3 the movable guide vane aperture is turned down, 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 by 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 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 reduce the runner bucket angle downwards by joint mechanism thereupon; four-way change-over valve 12 will make the fuel supply line a of blade voltage distribution valve 10 switch to oil return circuit b1; return tube b switches to oil feeding line a1, until blade angle reaches maximum.Afterwards, treat again that unit stops operating or after generating operation mode is converted to working conditions of phrase modulation (phase modulation setting-out) and finishes, by command control system by the automatic or manual design attitude that again fuel supply line a, return tube b is switched to former joint requirement of delaying time, the fuel supply line a and the oil feeding line a1 that are blade voltage distribution valve 10 lead to logical by two of four-way change-over valve 12, the return tube b of blade voltage distribution valve 10 and oil return circuit b1 lead to logical by other two of four-way change-over valve 12, the runner bucket angle being returned to the angle of former joint requirement, is that the joint relation returns to original state again.
The utility model concerns on the basis water turbine to be shut down and have the unit of phase modulation requirement to be transitioned into the working conditions of phrase modulation 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 also and can 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 finishes; again the 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 is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not one by one narration.
Claims (2)
1. low water head Kaplan turbine joint controlling device, it is characterized in that: comprise at least the blade voltage distribution valve (10) that joint mechanism connects, connect two of four-way change-over valve (12) between the fuel supply line of blade voltage distribution valve (10) and the oil feeding line and lead to, connect other two of four-way change-over valve (12) between the return tube of blade voltage distribution valve (10) and the oil return circuit and lead to.
2. a kind of low water head Kaplan turbine joint controlling device according to claim 1, it is characterized in that: the fuel supply line a of described blade voltage distribution valve (10) and oil return circuit b1 lead to logical by four-way change-over valve (12) two, return tube b and oil feeding line a1 lead to logical by four-way change-over valve (12) two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201797633U CN202659411U (en) | 2012-04-25 | 2012-04-25 | Joint adjusting device for low-water head Kaplan turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201797633U CN202659411U (en) | 2012-04-25 | 2012-04-25 | Joint adjusting device for low-water head Kaplan turbine |
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| Publication Number | Publication Date |
|---|---|
| CN202659411U true CN202659411U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201797633U Expired - Lifetime CN202659411U (en) | 2012-04-25 | 2012-04-25 | Joint adjusting device for low-water head Kaplan turbine |
Country Status (1)
| Country | Link |
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| CN (1) | CN202659411U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650259A (en) * | 2012-04-25 | 2012-08-29 | 中国水电顾问集团西北勘测设计研究院 | Joint control device and method for low waterhead Kaplan turbine |
-
2012
- 2012-04-25 CN CN2012201797633U patent/CN202659411U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650259A (en) * | 2012-04-25 | 2012-08-29 | 中国水电顾问集团西北勘测设计研究院 | Joint control device and method for low waterhead Kaplan turbine |
| CN102650259B (en) * | 2012-04-25 | 2014-06-04 | 中国水电顾问集团西北勘测设计研究院 | Joint control device and method for low waterhead Kaplan turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ELECTRIC POWER CONSTRUCTION GROUP NORTHWEST Free format text: FORMER NAME: HYDROCHINA XIBEI ENGINEERING CORPORATION Owner name: HYDROCHINA XIBEI ENGINEERING CORPORATION Free format text: FORMER NAME: NORTHWEST HYDROELECTRIC INVESTIGATION + DESIGN INSTITUTE OF CHINA HYDROPOWER ENGINEERING CONSULTING |
|
| CP01 | Change in the name or title of a patent holder |
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: 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 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 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |