CN103742337A - Bilateral guide vane through-flow turbine with elliptical runners - Google Patents
Bilateral guide vane through-flow turbine with elliptical runners Download PDFInfo
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- CN103742337A CN103742337A CN201310738185.1A CN201310738185A CN103742337A CN 103742337 A CN103742337 A CN 103742337A CN 201310738185 A CN201310738185 A CN 201310738185A CN 103742337 A CN103742337 A CN 103742337A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a bilateral guide vane through-flow turbine with elliptical runners. The bilateral guide vane through-flow turbine comprises a forward inflow runner, a vertical shaft, a supporting frame, a forward movable guide vane, a bidirectional power generation rotating wheel, a reverse movable guide vane, a reverse inflow runner, a generator and a speed increaser. The bilateral guide vane through-flow turbine is characterized in that the forward inflow runner has a forward elliptical section, the ratio of the short axis to the long axis of the forward inflow runner is a golden division ratio, the ratio of the short axis to the long axis of an ellipse from a forward inflow section to an inflow section in front of a forward movable guide vane section is linearly and gradually increased, the reverse inflow runner has a reverse elliptical section, the ratio of the short axis to the long axis of the reverse inflow runner is a golden division ratio, and the ratio of the short axis to the long axis of an ellipse from a reverse inflow section to an inflow section in front of a reverse movable guide vane section is linearly and gradually increased. By the aid of the bilateral guide vane through-flow turbine, water flow can smoothly and symmetrically flow in the elliptical runners, the overall power generation efficiency of a generator set is further improved, and the bilateral guide vane through-flow turbine is applicable to various vertical shaft through-flow turbines of low-head tidal power stations.
Description
Technical field
The invention belongs to fluid machinery and hydroelectric project equipment technical field, particularly relate to a kind of bilateral stator tubular turbine that is provided with oval runner.
Background technique
Along with the large-scale development of China's hydroelectric resources, belong to the middle and high head website that economic indicator is good fewer and feweri, develop low water head run-off river power station has particularly become the focus of research and has entered the practicability stage the exploitation of tidal energy thereupon.Known tubular turbine is because its inflow-rate of water turbine is large, rotating speed is high and efficiency is high, and efficient district is wide, compact structure and the advantage such as layout is simple and become a kind of most economical and suitable water turbine pattern in low water head water energy development, how to utilize these advantages develop a kind of can be applied to tidal power station, low water head, the large two-way shaft tubular formula of flow unit are significant efficiently.
Chinese patent application 201110363608.7 discloses a kind of " large-scale shaft tubular formula hydraulic generator unit ", this device is, in the both sides of concrete shaft, the water flow passage of walking around vertical shaft is set respectively, the cross section of vertical shaft is streamlined, and current enter the runner envelope of water turbine after the movable guide vane place of water turbine converges.But this device runner adopts rectangular cross-section, from import cross section to vane inlet cross section, be circumference transition, all more complicated in three-dimensional artificial modeling and manufacture process, practical application effect is not good yet.At present, what bidirectional tidal generating power station adopted mostly is the structure of one-sided stator, when adopting one-sided movable guide vane, can be by regulating the fit angle of movable guide vane and blade, make the hydraulic performance of forward generating better, but when oppositely generating electricity, there is no rearmounted movable guide vane, current do not form certain circular rector entering before runner, can not coordinate preferably with blade, cause the waterpower poor-performing that oppositely generates electricity.
The paper that Yang Chunxia delivers " adopts the two-way power generation performance research of morning and evening tides unit (Bidirectional Power Performance of a Tidal Unit with Unilateral and Double Guide Vanes) of one-sided-bilateral activity stator ", studied and adopted the one-sided and impact of two kinds of multi-form stators of bilateral activity stator on tubular morning and evening tides unit hydraulic performance, when adopting bilateral activity stator, its forward generating efficiency is 85.81%, oppositely generating efficiency is 80.66%, the total efficiency of forward and oppositely generating is better than adopting one-sided movable guide vane form, although adopt bilateral activity stator can improve generating efficiency, but also exist following not enough: when generating electricity forward or backwards simultaneously, current will produce whirlpool after water outlet stator enters outlet passage, both cause forward generating efficiency to reduce, and affect again reverse generating efficiency and improve.
How to overcome the deficiencies in the prior art and become one of emphasis difficult problem urgently to be resolved hurrily in current fluid machinery and hydroelectric project equipment technical field.
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Summary of the invention
The object of the invention is provides a kind of bilateral stator tubular turbine that is provided with oval runner for overcoming existing the deficiencies in the prior art, the present invention can guarantee level and smooth in oval runner, the smooth and easy and mobile symmetry of current, the overall generating efficiency of unit is further improved, be applicable to the shaft tubular formula water turbine of various low water head tidal power stations.
A kind of bilateral stator tubular turbine that is provided with oval runner proposing according to the present invention, it comprises forward water inlet flow channel, vertical shaft, supporting frame, forward movable guide vane, two-way generating runner, reverse activity stator, reverse water inlet flow channel, generator and speed increaser, wherein: generator is connected by speed increaser with two-way generating runner; Generator and speed increaser are placed in vertical shaft; Forward movable guide vane is arranged between forward water inlet flow channel and two-way generating runner; This reverse activity stator is arranged between two-way generating runner and reverse water inlet flow channel, reverse activity stator equates with forward movable guide vane quantity and is uniformly distributed circumferentially respectively setting, it is characterized in that described forward water inlet flow channel is forward elliptic cross-section, the minor axis of this forward elliptic cross-section is golden section with the ratio of major axis; The oval minor axis in water inlet cross section and the ratio linear increment of major axis from forward water inlet cross section to forward movable guide vane section, entering the minor axis in the water inlet cross section before forward stator section and the ratio of major axis changes 1 into, by forward elliptic cross-section, change forward circular cross-section into; Described reverse water inlet flow channel is reverse elliptic cross-section, and the minor axis of this reverse elliptic cross-section is golden section with the ratio of major axis; The ellipse short shaft in the water inlet cross section from reverse water inlet cross section to reverse activity stator section and the ratio linear increment of major axis, entering the minor axis in the water inlet cross section before reverse stator section and the ratio of major axis changes 1 into, by reverse elliptic cross-section, change reverse circular cross-section into; The cross section of described vertical shaft is streamlined.
Working principle of the present invention is: generator is arranged in the upstream vertical shaft of tubular turbine, the section of vertical shaft is streamlined.When forward generates electricity, current enter forward water inlet flow channel, walk around vertical shaft, at the forward movable guide vane place of tubular turbine, converge and enter the runner envelope of tubular turbine, water impact runner blade, drives the rotation of tubular turbine output shaft by runner blade switching energy, and now reverse activity stator is full-gear, current are by reverse activity stator, through oppositely water inlet flow channel outflow; When reverse generating, current are flowed into by reverse water inlet flow channel, current enter the runner envelope of tubular turbine by reverse activity stator, water impact runner blade, by runner blade switching energy, drive the rotation of tubular turbine output shaft, now forward movable guide vane is full-gear, and current are by forward movable guide vane, walk around vertical shaft, through forward water inlet flow channel, flow out.
The present invention compared with prior art its remarkable advantage is: the one, and the present invention adopts oval water flow passage, greatly reduces three-dimensional modeling and manufacture difficulty, thereby has guaranteed level and smooth in runner, the smooth and easy and mobile symmetry of current, has improved the operation usefulness of water turbine.The 2nd, stator when the present invention can guarantee stator unlatching rotates flexibly, inflow-rate of water turbine is large and water guide performance is good, can guarantee that again the Surface of action water shutoff performance at stator two ends when stator is closed is better; When forward generates electricity, by regulating forward movable guide vane angle, make current form certain circular rector entering before runner, keep the hydraulic performance of good forward generating, as when rated head is 2.5 meters, the present invention can make forward generating efficiency reach 89%; When reverse generating, by regulating reverse activity stator, make current form certain circular rector entering before runner, greatly improve reverse generating efficiency, as when rated head is 2.5 meters, the present invention can make reverse generating efficiency reach 82%.The 3rd, the present invention is when declared working condition, blade angle of the present invention is that 70 °, blade angle adjustment range are-4 ° to+4 °, runner blade in running and stator keep synergy simultaneously, thereby improved generating efficiency, particularly at head luffing and changes in flow rate, all can steadily generate electricity and keep higher generating efficiency large in the situation that.The 4th, the present invention, still can normal power generation while being 2 meters as head when head is lower, large quantum jump the limiting value of prior art power generation conditions.The present invention is widely used in the shaft tubular formula water turbine of various low water head tidal power stations.
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Accompanying drawing explanation
Fig. 1 is the plan view of a kind of bilateral stator tubular turbine structure that is provided with oval water flow passage that the present invention proposes.
Fig. 2 is the front view of a kind of bilateral stator tubular turbine structure that is provided with oval water flow passage that the present invention proposes.
Fig. 3 is the forward movable guide vane that proposes of the present invention and the layout schematic diagram of reverse activity stator.
Fig. 4 is the forward movable guide vane form structure schematic diagram that the present invention proposes.
Fig. 5 is the reverse activity stator form structure schematic diagram that the present invention proposes.
Fig. 6 is the schematic diagram of the guide vane opening regulation range that proposes of the present invention.
Fig. 7 is the oval water inlet flow channel schematic diagram of forward that the present invention proposes.
Fig. 8 is the reverse oval water inlet flow channel schematic diagram that the present invention proposes.
Description of reference numerals: forward water inlet flow channel (1), vertical shaft (2), generator (3), speed increaser (4), supporting frame (5), forward movable guide vane (6), two-way generating runner (7), reverse activity stator (8), oppositely water inlet flow channel (9), stator tapered narrow end (10), the wide end of stator taper (11), stator rotary centerline (12), stator full-gear (13), stator complete shut-down state (14), forward elliptic cross-section (15), forward circular cross-section (16), oppositely elliptic cross-section (17), oppositely circular cross-section (18), angle between stator rotary centerline (12) and unit rotary centerline (19) is that θ, stator angle of taper are α.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
In conjunction with Fig. 1 and Fig. 2, a kind of bilateral stator tubular turbine that is provided with oval runner that the present invention proposes, it comprises forward water inlet flow channel (1), vertical shaft (2), supporting frame (5), forward movable guide vane (6), two-way generating runner (7), reverse activity stator (8), reverse water inlet flow channel (9), generator (3) and speed increaser (4), and described generator (3) is connected by speed increaser (4) with two-way generating runner (7); Generator (3) and speed increaser (4) are placed in vertical shaft (2); Forward movable guide vane (6) is arranged between forward water inlet flow channel (1) and two-way generating runner (7); This reverse activity stator (8) is arranged between two-way generating runner (7) and reverse water inlet flow channel (9), reverse activity stator (8) equates with forward movable guide vane (6) quantity and is uniformly distributed circumferentially respectively setting, wherein: described forward water inlet flow channel (1) is forward elliptic cross-section (15), the minor axis of this forward elliptic cross-section (15) is golden section with the ratio of major axis; The oval minor axis in water inlet cross section and the ratio linear increment of major axis from forward water inlet cross section to forward movable guide vane (6) section, at the minor axis in water inlet cross section and the ratio of major axis that enter before forward stator (6) section, change 1 into, by forward elliptic cross-section (15), change forward circular cross-section (16) into; Described reverse water inlet flow channel (9) is reverse elliptic cross-section (17), and the minor axis of this reverse elliptic cross-section (17) is golden section with the ratio of major axis; The ellipse short shaft in water inlet cross section and the ratio linear increment of major axis from reverse water inlet cross section to reverse activity stator (8) section, at the minor axis in water inlet cross section and the ratio of major axis that enter before reverse stator (8) section, change 1 into, by reverse elliptic cross-section (17), change reverse circular cross-section (18) into; The cross section of described vertical shaft (2) is streamlined.
In conjunction with Fig. 3, Fig. 4 and Fig. 5, the longitudinal cross-section of forward movable guide vane of the present invention (6) and reverse activity stator (8) is streamline taper, and this angle of taper α is 22 °～24 °, is arranged in symmetrically the both sides of two-way generating runner (7); Stator two ends are spheric structure, and inner ball surface is connected with stator tapered narrow end, and outer spherical surface is connected with the wide end of stator taper; Angle theta between stator rotary centerline (12) and unit rotary centerline (19) that described forward movable guide vane (6) and reverse activity stator (8) arrange is 80 °, and Sealing Surface and unit rotary centerline (19) that forward movable guide vane (6) and reverse activity stator (8) form are unsettled cross-distribution; The quantity of described forward movable guide vane (6) and reverse activity stator (8) is 10,12 or 14.
In conjunction with Fig. 6, forward movable guide vane of the present invention (6) and reverse activity stator (8) are controlled water flow and water (flow) direction; When forward generates electricity, reverse activity stator (8) angle is for keeping full-gear; While oppositely generating electricity, forward movable guide vane (6) angle is for keeping full-gear, forward movable guide vane (6) or reverse activity stator (8) are 88 ° from stator full-gear (13) to the angle of stator complete shut-down state (14), and the inflow-rate of water turbine of its oblique water distributor is large, and energy conversion efficiency is high.
In conjunction with Fig. 7, forward water inlet flow channel of the present invention (1) is forward elliptic cross-section (15), and the minor axis of this forward elliptic cross-section (15) is golden section with the ratio of major axis; The oval minor axis in water inlet cross section and the ratio linear increment of major axis from forward water inlet cross section to forward movable guide vane (6) section, at the minor axis in water inlet cross section and the ratio of major axis that enter before forward stator (6) section, change 1 into, from forward elliptic cross-section (15), become forward circular cross-section (16).
In conjunction with Fig. 8, reverse water inlet flow channel of the present invention (9) is reverse elliptic cross-section (17), and the minor axis of this reverse elliptic cross-section (17) is golden section with the ratio of major axis; The ellipse short shaft in water inlet cross section and the ratio linear increment of major axis from reverse water inlet cross section to reverse activity stator (8) section, at the minor axis in water inlet cross section and the ratio of major axis that enter before reverse stator (8) section, change 1 into, by reverse elliptic cross-section (17), change reverse circular cross-section (18) into.
Specific embodiment of the invention process is: generator (3) is arranged in the vertical shaft (2) of the upstream of water turbine, the section of vertical shaft (2) is streamlined; When forward generates electricity, current enter forward water inlet flow channel (1), walk around vertical shaft (2), at the forward movable guide vane (6) of tubular turbine, locate to converge and enter the runner envelope of tubular turbine, the two-way generating runner of water impact (7) blade, drives the rotation of tubular turbine output shaft by two-way generating runner (7) blade switching energy, and now reverse activity stator (8) is full-gear, current are by reverse activity stator (8), through oppositely water inlet flow channel (9) outflow; When reverse generating, current are flowed into by reverse water inlet flow channel (9), current enter the runner envelope of tubular turbine by reverse activity stator (8), the two-way generating runner of water impact (7) blade, by the rotation of two-way generating runner (7) blade switching energy band water turbine output shaft, now forward movable guide vane (6) is full-gear, and current are by forward movable guide vane (6), walk around vertical shaft (2), through forward water inlet flow channel (1), flow out.
The explanation not relating in the specific embodiment of the present invention belongs to technology well known in the art, can be implemented with reference to known technology.
The present invention, through validation trial, has obtained satisfied effect.
Claims (6)
1. one kind is provided with the bilateral stator tubular turbine of oval runner, it comprises forward water inlet flow channel (1), vertical shaft (2), supporting frame (5), forward movable guide vane (6), two-way generating runner (7), reverse activity stator (8), reverse water inlet flow channel (9), generator (3) and speed increaser (4), wherein: generator (3) is connected by speed increaser (4) with two-way generating runner (7); Generator (3) and speed increaser (4) are placed in vertical shaft (2); Forward movable guide vane (6) is arranged between forward water inlet flow channel (1) and two-way generating runner (7); This reverse activity stator (8) is arranged between two-way generating runner (7) and reverse water inlet flow channel (9), reverse activity stator (8) equates with forward movable guide vane (6) quantity and is uniformly distributed circumferentially respectively setting, it is characterized in that described forward water inlet flow channel (1) is forward elliptic cross-section (15), the minor axis of this forward elliptic cross-section (15) is golden section with the ratio of major axis; The oval minor axis in water inlet cross section and the ratio linear increment of major axis from forward water inlet cross section to forward movable guide vane (6) section, at the minor axis in water inlet cross section and the ratio of major axis that enter before forward stator (6) section, change 1 into, by forward elliptic cross-section (15), change forward circular cross-section (16) into; Described reverse water inlet flow channel (9) is reverse elliptic cross-section (17), and the minor axis of this reverse elliptic cross-section (17) is golden section with the ratio of major axis; The ellipse short shaft in water inlet cross section and the ratio linear increment of major axis from reverse water inlet cross section to reverse activity stator (8) section, at the minor axis in water inlet cross section and the ratio of major axis that enter before reverse stator (8) section, change 1 into, by reverse elliptic cross-section (17), change reverse circular cross-section (18) into; The cross section of described vertical shaft (2) is streamlined.
2. a kind of bilateral stator tubular turbine based on oval water flow passage according to claim 1, it is characterized in that forward movable guide vane (6) and reverse activity stator (8) are taper, this angle of taper α is 22 °～24 °, is symmetricly set on runner both sides.
3. a kind of bilateral stator tubular turbine based on oval water flow passage according to claim 1, is characterized in that the longitudinal cross-section of forward movable guide vane (6) and reverse activity stator (8) is streamline taper; Stator two ends are spheric structure, and inner ball surface is connected with stator tapered narrow end, and outer spherical surface is connected with the wide end of stator taper.
4. a kind of bilateral stator tubular turbine based on oval water flow passage according to claim 1, it is characterized in that the angle theta between forward movable guide vane (6) and stator rotary centerline (12) and the unit rotary centerline (19) of reverse activity stator (8) setting is 80 °, Sealing Surface and unit rotary centerline (19) that forward movable guide vane (6) and reverse activity stator (8) form are unsettled cross-distribution.
5. a kind of bilateral stator tubular turbine based on oval water flow passage according to claim 1, is characterized in that the quantity of forward movable guide vane (6) and reverse activity stator (8) is 10,12 or 14.
6. according to a kind of bilateral stator tubular turbine based on oval water flow passage described in claim 1,2,3,4 or 5, it is characterized in that forward movable guide vane (6) and reverse activity stator (8) control water flow and water (flow) direction; When forward generates electricity, reverse activity stator (8) angle is for keeping full-gear; When reverse generating, forward movable guide vane (6) angle is for keeping full-gear, and forward movable guide vane (6) or reverse activity stator (8) are 88 ° from stator full-gear (13) to the angle of stator complete shut-down state (14).
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| CN201310738185.1A CN103742337B (en) | 2013-12-27 | 2013-12-27 | A kind of bilateral stator tubular turbine being provided with oval runner |
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Cited By (10)
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| CN105370479A (en) * | 2015-12-29 | 2016-03-02 | 河海大学 | Water turbine system for generating electricity by using ocean energy |
| CN105863929A (en) * | 2016-04-29 | 2016-08-17 | 河海大学 | Portable hydroelectric generation device with foldable elliptical fairing |
| CN105909455A (en) * | 2016-04-29 | 2016-08-31 | 河海大学 | Hydroelectric generator with suspension guiding and fixing device |
| CN105909454A (en) * | 2016-04-29 | 2016-08-31 | 河海大学 | Portable mini-type hydro-electric power generating equipment for field charging |
| CN106194552A (en) * | 2015-12-29 | 2016-12-07 | 河海大学 | A kind of axial flow hydraulic turbine utilizing power generation with marine energy |
| CN108730098A (en) * | 2017-04-13 | 2018-11-02 | 许昌义 | The two-way shaft tubular formula hydraulic turbine of automatic conversion |
| CN108798968A (en) * | 2017-05-03 | 2018-11-13 | 许昌义 | Two-way bulb through-flow turbine with jaw clutch |
| CN109253033A (en) * | 2017-07-13 | 2019-01-22 | 许昌义 | Two-way bulb through-flow turbine with splined clutch |
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| CN112487583A (en) * | 2020-12-17 | 2021-03-12 | 清华大学 | Through-flow reversible unit blade full three-dimensional weighting design method and device |
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| CN105863929B (en) * | 2016-04-29 | 2018-09-04 | 河海大学 | A kind of Portable hydroelectric device with foldable class ellipse kuppe |
| CN105909454A (en) * | 2016-04-29 | 2016-08-31 | 河海大学 | Portable mini-type hydro-electric power generating equipment for field charging |
| CN105909455A (en) * | 2016-04-29 | 2016-08-31 | 河海大学 | Hydroelectric generator with suspension guiding and fixing device |
| CN105909454B (en) * | 2016-04-29 | 2018-05-29 | 河海大学 | A kind of portable minisize hydro-electric power generating equipment to charge for field |
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| CN108730098B (en) * | 2017-04-13 | 2021-03-12 | 陆可 | Automatic-switching bidirectional shaft through-flow turbine |
| CN108798968A (en) * | 2017-05-03 | 2018-11-13 | 许昌义 | Two-way bulb through-flow turbine with jaw clutch |
| CN109253033A (en) * | 2017-07-13 | 2019-01-22 | 许昌义 | Two-way bulb through-flow turbine with splined clutch |
| CN111828230A (en) * | 2020-07-03 | 2020-10-27 | 温州职业技术学院 | Hydropower station power generation device with flow automatic allocation system |
| CN111828230B (en) * | 2020-07-03 | 2021-08-10 | 温州职业技术学院 | Hydropower station power generation device with flow automatic allocation system |
| CN112487583A (en) * | 2020-12-17 | 2021-03-12 | 清华大学 | Through-flow reversible unit blade full three-dimensional weighting design method and device |
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Application publication date: 20140423 Assignee: JIANGSU QINHUAI RIVER WATER CONSEVANCY ENGINEERING DIVISION Assignor: HOHAI University Contract record no.: X2020980005078 Denomination of invention: A tubular turbine with double guide vanes with elliptical runner Granted publication date: 20160120 License type: Common License Record date: 20200817 |