CN103016245A - Impact turbine spray and flow control device and method thereof - Google Patents
Impact turbine spray and flow control device and method thereof Download PDFInfo
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- CN103016245A CN103016245A CN2013100247601A CN201310024760A CN103016245A CN 103016245 A CN103016245 A CN 103016245A CN 2013100247601 A CN2013100247601 A CN 2013100247601A CN 201310024760 A CN201310024760 A CN 201310024760A CN 103016245 A CN103016245 A CN 103016245A
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Abstract
Provided are an impact turbine spray and flow control device and a method thereof. A flow control device 7 is arranged on the periphery of a turbine runner 5 which is connected with a cylinder body 11 of the flow control device 7 via a supporting bar 8; the flow control device 7 is fixed on plant second-stage concrete 9 while disconnected with the turbine runner; and by adjusting the size of a flow regulator hole 10 on the flow control device 7 to perform adjusting function to replace the adjusting function of an outside regulating mechanism in an existing unit, the adjusting problem of the impact turbine is solved, and the double adjustment of the impact turbine is achieved. During the design of a hydropower station, a surge shaft of a diversion system can be cancelled, or the size of the surge shaft can be effectively reduced, and therefore the engineering design is optimized and project investment costs are reduced. Furthermore, the impact turbine spray and flow control device and the method thereof are characterized in that the flow control device 7 is composed of a full body 11, the flow regulator hole 10, a flow regulator board 12 and a flow regulator hole servomotor 13, wherein the flow regulator hole 10, the flow regulator board 12 and the flow regulator hole servomotor 13 correspond to each nozzle jet device ( see figure 5 and figure 6), and accordingly, single control for each nozzle flow by the flow control device is achieved.
Description
Technical field
The invention belongs to the hydraulic machinery engineering, particularly a kind of impulse turbine one spray one flow control amount device and method.
Background technique
The regulatory function of impulse turbine speed regulator, the same with axial-flow Kaplan (containing diagonal flow type, tubular) water turbine, need to carry out dual regulation, nozzle and outer adjusting mechanism (jet deflector or shunt) are regulated simultaneously, and keep predetermined joint relation, to realize the flow control to runner, meet rotational speed of water turbine and the automatic adjusting of exerting oneself.Therefore, for the speed regulator of above-mentioned form water turbine, unexceptional employing dual regulation modes all.Because impulse turbine generally is middle-size and small-size, single-machine capacity is mostly all below 30 MW, the operation and these units all are connected to the grid, its single-machine capacity accounts for installed capacity in power grid mostly all below 10%, the stability of unit operation is less to electric network influencing, the outer adjusting mechanism (jet deflector or shunt) in the impulse turbine regulating system particularly, adjusting to unit brings noise, vibration (Fig. 1, Fig. 2 regulates mechanism's (jet deflector or shunt) 1 outward and is arranged on the termination of nozzle 3, be subject to nozzle 3 to stretch into the cantilever effect of runner envelope 4, produce very large vibration and noise to unit after outer adjusting mechanism (jet deflector or shunt) 1 devotes oneself to work) etc. practical problem, and the collision of the current that are folded to or shunt by runner envelope is difficult to reach by experiment theoretically determine it is also the theoretical question of impact type unit dual regulation to the secondary action of runner.Therefore; many middle-size and small-size impulse turbines that newly manufacture and design are in order to reduce the impact of the problems referred to above on unit operation; clearly the function of accident protection is only undertaken by outer adjusting mechanism (jet deflector or shunt); do not participate in the adjusting of water turbine; also just no longer with the nozzle needle switch, keep the joint relation; only outside unit load has large variation (rising rate of rolational speed of generating set or drop to certain value), regulate mechanism's (jet deflector or shunt) rapidly (being generally 2～3 s) block current or unlatching, during load rejection, current are blocked rapidly in the outer mechanism's (jet deflector or shunt) that regulates.Along with the development of this several years home and abroad high head impact units, single-machine capacity has reached 187.5MW, and the proportion occupied in the electrical network had is increasing, and the problem that such adjusting brings will be more and more outstanding, main problem:
1, due to the needs of operation of power networks, when such unit capacity is occupied proportion when larger in electrical network, the performance of unit is extremely unstable, can cause the unstable accidents caused of electric power system. as high bridge power station, Yunnan is equipped with three vertical four nozzle impact type hydraulic turbine groups, single-machine capacity 30 MW, rated head 550 m, rated speed 600 r/min.Water turbine has adopted the import runner, is furnished with domestic CJWJ mono-4/1-63 type, microcomputer (PIE) speed regulator; This speed regulator is four nozzle needle servomotors and a jet deflector servomotor; with the numerical control ball valve as electro-hydraulic converting element; speed regulator adopts nozzle needle aperture displacement transducer as electric feedback elements; the jet deflector displacement only has the aperture indication; without feedback elements;, therefore do not participate in regulating without the joint relation with the nozzle needle aperture yet, only play the accident protective action.The high bridge power station is with 110 kV circuit access area power grids, area power grid with 220 kV circuit with economize net and link, the end that high bridge power station system is incorporated to province's electrical network is incorporated into the power networks, under electrical network and power station normal operating condition, not yet find the problem .2004 mid-September of operation stability aspect, the 220 kV interconnections that the single site network of high bridge power station access and province's net link arrange interruption maintenances.After disconnecting the 220kV interconnection, the high bridge power station as main force's power supply with the single site network accessed in the island network running state.The high bridge power station is three unit synteny 80 MW load operations at that time, and the load of location net only has 25 MW left and right, 220 kV interconnections disconnect and to mean that the load in high bridge power station is down to suddenly 25 MW by 80 MW, in load great fluctuation process state, grid cyclic wave rises to rapidly 59.7 Hz, three machine removal of loads are closed jet deflector to complete shut-down in 2 s, area power grid loses suddenly main force's power supply, cycle plunges to 47.8 Hz, three machines of high bridge are opened rapidly jet deflector simultaneously, and grid cyclic wave rises again rapidly; Cycle changes back and forth several times rapidly, and network load is complete resection (low-frequency load reduction) in succession, the area power grid collapse, and three machine rotating speeds of high bridge are down to the whole off-the-lines of 300 r/min, and station service disappears.Economize electrical network and have to close again 220 kV interconnections, recover regional mains supply, and then successively three, high bridge power station machine is connected to the grid, last 40 min, cause area power grid to the interruption of power supply of important load tens minutes, cause the mains supply discontinuity events.
2, blocking the no thoroughness of current due to outer adjusting mechanism (jet deflector or shunt), in order to meet the requirement of rising rate of rolational speed of generating set, must be that nozzle needle is closed within a certain period of time.Impulse turbine is that high head is all generally long water channeling type power station, met the requirement of closing of nozzle needle, often the diversion system pressure rise does not meet the demands again, again in order to meet the pressure rise requirement, diversion system all is provided with a larger surge shaft, and engineering investment cost is larger.
This patent is exactly fundamentally to solve by a kind of flow control device noise, the vibration that the adjusting of impact type unit brings (to regulate the termination that mechanism's (jet deflector or shunt) is arranged on nozzle 2 outward, be subject to nozzle 2 to stretch into the cantilever effect of runner envelope 4, after outer adjusting mechanism (jet deflector or shunt) 1 devotes oneself to work, to unit, produce very large vibration and noise) etc. practical problem; And the collision of the current that are folded to or shunt by runner envelope is difficult to reach by experiment theoretical definite theoretical question to the secondary action of runner.Realize the good dual regulation of impulse turbine, improve the stability of unit and Operation of Electric Systems.Cancel the setting of diversion system surge shaft or reduce the size of surge shaft, optimal design in Power Plant Design, reduce diversion tunnel and penstock cross-section size; Reduce penstock external wrapping concrete, tunnel lining thickness and arrangement of reinforcement; Reduce the design thickness of penstock and Water distribution circular pipe; Reduce the rotary inertia of hydraulic generator unit.Reduce engineering investment cost.
Summary of the invention
The present invention is to provide a kind of impulse turbine one spray one flow control amount device and method.
The object of the present invention is achieved like this, a kind of impulse turbine one spray one flow control amount device and method, it is characterized in that: shown in Fig. 3,4, at the peripheral flow control device 7 that a tubular is installed of rotary wheel of water turbine 5, and be connected with the cylindrical shell 11 of flow control device 7 by strut 8, flow dontroller 7 is fixed on factory building second stage concrete 9, is not connected with water turbine.Flow control device 7 is comprised of cylindrical shell 11 and corresponding Flow-rate adjustment hole 10, the flow control board 12 of similar gate, the Flow-rate adjustment hole servomotor 13 of each injection stream device, refers to Fig. 5, Fig. 6.Working principle is: by adjusting the size of flow adjustment hole 10 on flow control device 7, replace the regulatory function of the outer adjusting mechanism (jet deflector or shunt) in present unit, solve the problem that impulse turbine exists.
Advantage of the present invention:
1, the outer adjusting mechanism (jet deflector or shunt) cancelled on the nozzle of impulse water turbine head is replaced by flow control device, flow control device is fixed on the factory building second stage concrete, has solved vibration and noise that outer adjusting mechanism (jet deflector or shunt) produces unit; Flow control device is around runner one week, can thoroughly cut off the positive effect of injection stream to runner; Can realize impulse turbine dual regulation truly;
2, realize dual regulation truly, can improve the stability of Operation of Electric Systems;
3, flow control device is good to the runner flow control, when unit needs emergency shutdown, can effectively control rising rate of rolational speed of generating set and pressure rise.Therefore, in hydroelectric station design, can cancel the setting of diversion system surge shaft or effectively reduce the size of surge shaft, can reduce diversion tunnel and penstock cross-section size; Reduce penstock external wrapping concrete, tunnel lining thickness and arrangement of reinforcement; Reduce the design thickness of penstock and Water distribution circular pipe; Reduce the rotary inertia of hydraulic generator unit.Reduce engineering investment cost.
The accompanying drawing explanation
Below in conjunction with embodiment's accompanying drawing, the invention will be further described:
Fig. 1: the A-A sectional drawing that is original structure schematic diagram 2 of the present invention;
Fig. 2: the B-B sectional drawing that is original structure schematic diagram 1 of the present invention;
Fig. 3: the C-C sectional drawing that is embodiment of the present invention structural representation Fig. 4;
Fig. 4: the D-D sectional drawing that is embodiment of the present invention structural representation Fig. 3;
Fig. 5: be flow control device 7 example structure schematic diagram of the present invention;
Fig. 6: be A enlarged view in flow control device 7 example structure schematic diagram 5 of the present invention.
Reference character is as follows:
1. regulate mechanism's (jet deflector or shunt), 2. nozzle needle, 3. nozzle, 4. runner envelope, 5. runner, 6. water turbine, 7. flow control device, 8. strut, 9. second stage concrete, 10. Flow-rate adjustment hole, 11. cylindrical shells, 12. flow control boards, 13. Flow-rate adjustment hole servomotors outward.
embodiment
As shown in Figure 3,4, at the peripheral flow control device 7 that a tubular is installed of rotary wheel of water turbine 5, and be connected with the cylindrical shell 11 of flow control device 7 by strut 8, flow dontroller 7 is fixed on factory building second stage concrete 9.Flow control device 7 is comprised of Fig. 5,6 each parts, (the Flow-rate adjustment hole is on the jet axis of each nozzle in each corresponding Flow-rate adjustment hole 10 of nozzle 3, size, with the maximum value of jet diameter or larger than maximum value, is determined according to design), flow control board 12, Flow-rate adjustment hole servomotor 13.When power station, load reduces suddenly, rising rate of rolational speed of generating set, the seepage tunnel, high-head power station, the long restriction due to the surge pressure rising of steel pipe length, water turbine nozzle needle 2 can not turn down rapidly, at this moment by being connected to Flow-rate adjustment hole servomotor on cylindrical shell 11 13, drive rapidly flow control board 12 on flow control device 7 to reduce Flow-rate adjustment hole 10 cutout portion current to enter runner 5, to control rising rate of rolational speed of generating set, then by nozzle needle 2, the requirement according to pressure rise slowly turns down, rotating speed drops to certain value, Flow-rate adjustment hole servomotor 13 drives flow control board 12 turn-on flow rate adjustment holes 10 again, nozzle needle 2 phase downs, rotating speed rises again, Flow-rate adjustment hole servomotor 13 again drives adjusting-flow board 12 to reduce Flow-rate adjustment hole 10 cutout portion current and enters runner 5, control rising rate of rolational speed of generating set, nozzle needle 2 slowly turns down according to the requirement of pressure rise again, several times reciprocal like this, make nozzle 2 apertures adjust to the desired aperture of unit load, generating unit speed is stabilized in the rotating speed of requirement, subsequently again by Flow-rate adjustment hole servomotor 13, Flow-rate adjustment hole 10 is opened to initial conditions (maximum), when the power station load rejection needs emergency shutdown, operation flow adjustment hole servomotor 13 drives flow control board 12 by Flow-rate adjustment hole 10 contract fullys rapidly, cut off current and enter runner 5, control rising rate of rolational speed of generating set, close slowly nozzle needle 2 according to the requirement of pressure rise subsequently, close after unit comes to a complete stop until nozzle needle 2 that to drive flow control boards 12 by Flow-rate adjustment hole servomotor 13 again be that Flow-rate adjustment hole 10 is opened to initial conditions (maximum) fully, when power station, load increases, and with identical nozzle needle 2 apertures of conventional adjusting, increases.
Claims (3)
1. an impulse turbine one sprays a flow control amount device and method, it is characterized in that: Fig. 3, shown in 4, at the peripheral flow control device 7 that a tubular is installed of rotary wheel of water turbine 5, and be connected with the cylindrical shell 11 of flow control device 7 by strut 8, flow dontroller 7 is fixed on factory building second stage concrete 9, with water turbine, be not connected, by adjusting the size of flow adjustment hole 10 on flow control device 7, replace outer adjusting mechanism (jet deflector or the shunt) regulatory function in present unit, vibration and noise that outer adjusting mechanism (jet deflector or shunt) produces unit have been solved, flow control device is around runner one week, can thoroughly cut off the positive effect of injection stream to runner, can realize impulse turbine dual regulation truly.
2. a kind of impulse turbine one according to claim 1 sprays a flow control amount device and method, it is characterized in that flow control device 7 is by Fig. 5, 6 each parts form, (the Flow-rate adjustment hole is on the jet axis of each nozzle in each corresponding Flow-rate adjustment hole 10 of nozzle 3, the big or small maximum value with jet diameter or larger than maximum value, according to design, determine), flow control board 12, Flow-rate adjustment hole servomotor 13. is loaded and is reduced suddenly when power station, rising rate of rolational speed of generating set, the seepage tunnel, high-head power station, the long restriction due to the surge pressure rising of steel pipe length, water turbine nozzle needle 2 can not turn down rapidly, at this moment by being connected to Flow-rate adjustment hole servomotor on cylindrical shell 11 13, drive rapidly flow control board 12 on flow control device 7 to reduce Flow-rate adjustment hole 10 cutout portion current to enter runner 5, to control rising rate of rolational speed of generating set, then by nozzle needle 2, the requirement according to pressure rise slowly turns down, rotating speed drops to certain value, Flow-rate adjustment hole servomotor 13 drives flow control board 12 turn-on flow rate adjustment holes 10 again, nozzle needle 2 phase downs, rotating speed rises again, Flow-rate adjustment hole servomotor 13 again drives adjusting-flow board 12 to reduce Flow-rate adjustment hole 10 cutout portion current and enters runner 5, control rising rate of rolational speed of generating set, nozzle needle 2 slowly turns down according to the requirement of pressure rise again, several times reciprocal like this, make nozzle 2 apertures adjust to the desired aperture of unit load, generating unit speed is stabilized in the rotating speed of requirement, subsequently again by Flow-rate adjustment hole servomotor 13, Flow-rate adjustment hole 10 is opened to initial conditions (maximum), when the power station load rejection needs emergency shutdown, operation flow adjustment hole servomotor 13 drives flow control board 12 by Flow-rate adjustment hole 10 contract fullys rapidly, cut off current and enter runner 5, control rising rate of rolational speed of generating set, close slowly nozzle needle 2 according to the requirement of pressure rise subsequently, close after unit comes to a complete stop until nozzle needle 2 that to drive flow control boards 12 by Flow-rate adjustment hole servomotor 13 again be that Flow-rate adjustment hole 10 is opened to initial conditions (maximum) fully, when power station, load increases, and with identical nozzle needle 2 apertures of conventional adjusting, increases.
3. a kind of impulse turbine one according to claim 1 sprays a flow control amount device and method; it is characterized in that: 7 pairs of runner flow controls of flow control device are good; when unit needs emergency shutdown; can effectively control rising rate of rolational speed of generating set and pressure rise. therefore; in hydroelectric station design; can cancel the setting of diversion system surge shaft or effectively reduce the size of surge shaft, can reduce diversion tunnel and penstock cross-section size; Reduce penstock external wrapping concrete, tunnel lining thickness and arrangement of reinforcement; Reduce the design thickness of penstock and Water distribution circular pipe; Reduce the rotary inertia of hydraulic generator unit; Reduce engineering investment cost
.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100247601A CN103016245A (en) | 2013-01-24 | 2013-01-24 | Impact turbine spray and flow control device and method thereof |
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| CN2013100247601A CN103016245A (en) | 2013-01-24 | 2013-01-24 | Impact turbine spray and flow control device and method thereof |
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| CN103016245A true CN103016245A (en) | 2013-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481777B (en) * | 2014-09-29 | 2016-07-06 | 华自科技股份有限公司 | A kind of impulse turbine multiinjector changing method |
| CN114576062A (en) * | 2022-02-28 | 2022-06-03 | 东方电气集团东方电机有限公司 | Water distribution ring pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191113961A (en) * | 1911-06-12 | 1911-11-02 | John Kincaid | Water Wheel Gate Rings. |
| JPH0245661A (en) * | 1988-08-05 | 1990-02-15 | Meidensha Corp | Governor controller for water wheel |
| JP2007032575A (en) * | 2006-10-02 | 2007-02-08 | Fuji Electric Systems Co Ltd | Horizontal shaft pelton turbine |
| CN201025219Y (en) * | 2007-05-11 | 2008-02-20 | 四川东风电机厂有限公司 | Hydraulic pressure controlled multi-spraying mouth device for impact water wheel machine |
| CN201810454U (en) * | 2010-10-13 | 2011-04-27 | 江西泰豪特种电机有限公司 | Reverse braking nozzle device of impulse turbine |
-
2013
- 2013-01-24 CN CN2013100247601A patent/CN103016245A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191113961A (en) * | 1911-06-12 | 1911-11-02 | John Kincaid | Water Wheel Gate Rings. |
| JPH0245661A (en) * | 1988-08-05 | 1990-02-15 | Meidensha Corp | Governor controller for water wheel |
| JP2007032575A (en) * | 2006-10-02 | 2007-02-08 | Fuji Electric Systems Co Ltd | Horizontal shaft pelton turbine |
| CN201025219Y (en) * | 2007-05-11 | 2008-02-20 | 四川东风电机厂有限公司 | Hydraulic pressure controlled multi-spraying mouth device for impact water wheel machine |
| CN201810454U (en) * | 2010-10-13 | 2011-04-27 | 江西泰豪特种电机有限公司 | Reverse braking nozzle device of impulse turbine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481777B (en) * | 2014-09-29 | 2016-07-06 | 华自科技股份有限公司 | A kind of impulse turbine multiinjector changing method |
| CN114576062A (en) * | 2022-02-28 | 2022-06-03 | 东方电气集团东方电机有限公司 | Water distribution ring pipe |
| CN114576062B (en) * | 2022-02-28 | 2023-08-29 | 东方电气集团东方电机有限公司 | Water distribution ring pipe |
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Application publication date: 20130403 |