CN104234912A - Water turbine compression gap volute structure - Google Patents
Water turbine compression gap volute structure Download PDFInfo
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- CN104234912A CN104234912A CN201410472492.4A CN201410472492A CN104234912A CN 104234912 A CN104234912 A CN 104234912A CN 201410472492 A CN201410472492 A CN 201410472492A CN 104234912 A CN104234912 A CN 104234912A
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- flexible material
- spiral case
- volute
- metal spiral
- snail
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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 relates to a water turbine compression gap volute structure, which comprises a metal volute and concrete on the periphery of the metal volute, wherein the inlet end of the metal volute is a section of straight pipe section, a water introducing steel pipe is connected with the straight pipe section arranged at the inlet end of the metal volute, the tail end of the straight pipe section is a volute direction 0-degree cross section, and a seat ring is arranged at a spiral-shaped structure inner ring part of the metal volute. The water turbine compression gap volute structure is characterized in that soft materials are fixedly arranged between the metal volute and the peripheral concrete, the soft materials generate plastic deformation when being pressed, a compression gap is formed, the force transmission coefficient of the soft materials is not greater than 50MPa/m, the deformation modulus of the soft materials is 0.05MPa to 0.5MPa, and the thickness of the soft materials is not greater than 10mm. The problems caused by and existing in the aspects of mechanical stability and durability of pad layer materials in the pad layer volute structure in the whole life cycle of the volute structure can be solved, the integrality of the volute structure is improved, a hydroelectric generating set can favorably realize long-time safe and stable operation, in addition, the manufacturing cost is low, the construction is simple and convenient, and the requirements of the volute structure of water stations in various waterheads can be met.
Description
Technical field
The present invention relates to the water turbine compression clearance worm frame in water power plant worm frame field, particularly Hydropower Unit.
Background technique
Along with the development of hydropower, large quantities of water power plants needs to build, the single-machine capacity of water turbine set, also by increasing, provide smooth water flow to water turbine set and will bear the spiral case composite structure that turbine-generator units structure transmits static and dynamic loadings and seem increasingly important.
Worm frame pattern conventional in engineering mainly contains direct-burried, water-filling pressurize and cushioned spiral case three kinds of structural types.
Direct-burried worm frame refers to directly at metal spiral case periphery configure reinforcing bar concreting, internal water pressure is born primarily of peripheral reinforced concrete construction, this worm frame form major advantage is that bearing capacity is high, shortcoming is that metal spiral case intensity does not give full play to, amount of reinforcement is large, under internal water pressure effect, there will be relatively wide crack at part range, to structural integrity and stability unfavorable.Preloading filling spiral case refers to that metal spiral case builds peripheral concrete under water filling preloading state, and the internal water pressure utilizing pressurize head control peripheral concrete to share, reduces peripheral concrete stressed, preloading filling spiral case need increase pressurize equipment, costly, and work progress is complicated, long in time limit.Cushioned spiral case structure refers to concreting again after the bed course of certain limit is laid on metal spiral case surface, this bed course has certain intermal force, effectively can distribute the internal water pressure that peripheral concrete and volute plate are born separately, its easy construction, cost are lower, but the mechanics of cushioning material in decades and even up to a hundred years During Process of Long-term Operations is stable and endurance issues there is no clear and definite conclusion, stressed very unfavorable to spiral case seat ring when this power transmission bed course lost efficacy.Therefore need to find a kind of can be formed constant compression gap, affect less water power plant worm frame pattern by materials ' durability and mechanical stability.
Summary of the invention
The object of this invention is to provide a kind of water turbine compression clearance worm frame, this worm frame utilizes flexible material to produce plastic deformation under the internal water pressure effect transmitted by metal spiral case, form more stable compression clearance, thus realize the ratio that internal water pressure shared by manual control metal spiral case and peripheral reinforced concrete construction.It avoid cushioning material mechanical property instability and endurance issues in cushioned spiral case structure, solve the key issue that cushioned spiral case structure accurately can not determine power transmission ratio, metal spiral case bearing capacity can be given full play to, reduce peripheral concrete stressed, improve the integrity of worm frame, be conducive to the stable operation of Hydropower Unit long-term safety.And its cost is low, easy construction, the water power plant worm frame needs of various head can be met.
Technological scheme of the present invention is water turbine compression clearance worm frame, it comprises metal spiral case and peripheral concrete thereof, the entrance point of metal spiral case is straight-run of pipe section, diversion steel pipe is connected with the straight length of metal spiral case entrance point, straight length end is that snail is to 0 ° of section, the snail shape structure inner ring place of metal spiral case outer surface is provided with seat ring, it is characterized in that: between metal spiral case and peripheral concrete, be fixed with flexible material, flexible material pressurized produces plastic deformation, form compression clearance, the power transmission coefficient of flexible material is not more than 50MPa/m, the deformation modulus of flexible material is 0.05MPa to 0.5MPa, the thickness of flexible material is not more than 10mm.
The initial position of described flexible material is positioned at the entrance point of metal spiral case, and the snail that the snail terminad of flexible material is positioned at metal spiral case is to before 310 °.
Described flexible material snail is 15 ° to 45 ° positions apart from seat ring upper ring plate to the meridian of section to laying initial position, and flexible material snail is between 90 ° to 225 ° of seat ring upper ring plate to the meridian terminad position of section.
Described flexible material is no more than below stringcourse 35 ° at straight length meridian terminad paving location.
Described flexible material is foam plate.
The surface smear of described flexible material has mortar cover.
Feature of the present invention is: lay rational flexible material outside metal spiral case, in unit running process, under long-term fluctuating load effect, flexible material pressurized produces plastic deformation, form stable compression clearance, thus realize the object accurately controlling the internal water pressure size that volute plate is born.It avoid cushioning material mechanical property instability and endurance issues in cushioned spiral case structure, solve cushioned spiral case structure and accurately can not determine this key issue of power transmission ratio, metal spiral case bearing capacity can be given full play to, reduce peripheral concrete stressed, improve the integrity of worm frame, be conducive to the stable operation of Hydropower Unit long-term safety.And its cost is low, easy construction, the water power plant metal spiral case structure needs of various head can be met.
Accompanying drawing explanation
Below in conjunction with specific embodiment, the present invention is further illustrated.
Fig. 1 is the schematic diagram of Hydropower Unit metal spiral case structure.
Fig. 2 is that in Fig. 1, I-I cuts open to schematic diagram.
In figure: 1, straight length; 2, metal spiral case; 3, flexible material; 4, peripheral concrete; 5, seat ring.
Embodiment
Embodiment 1
Water turbine compression clearance worm frame of the present invention as shown in Figure 1, it comprises the peripheral concrete 4 of metal spiral case 2 and metal spiral case 2, the entrance point of metal spiral case 2 is straight-run of pipe sections 1, diversion steel pipe is connected with the straight length 1 of metal spiral case entrance point, straight length 1 end is that snail is to 0 ° of section, the snail shape structure inner ring place of metal spiral case 2 outer surface is provided with seat ring 5, it is characterized in that: between metal spiral case 2 and peripheral concrete 4, be fixed with flexible material 3, flexible material 3 pressurized produces plastic deformation, form compression clearance, the power transmission coefficient of flexible material 3 is not more than 50MPa/m, the deformation modulus of flexible material 3 is 0.05MPa to 0.5MPa, the thickness of flexible material 3 is not more than 10mm, the power transmission coefficient of flexible material 3 is flexible material deformation modulus and the ratio of flexible material thickness, in Hydropower Plant running, under secular variation load action, flexible material 3 pressurized produces plastic deformation, form compression clearance, this gap value and flexible material residual deformation sum are no more than 10mm, namely the thickness of laid flexible material 3 is not more than 10mm.。
Flexible material 3 is foam plates, and the surface smear of flexible material 3 has mortar cover, and mortar cover can effectively prevent flexible material 3 from suffering the artificial destruction in peripheral concrete 4 work progress.
This compression clearance worm frame, flexible material 3 is laid outside metal spiral case 2, in unit running process, under long-term fluctuating load effect, flexible material 3 pressurized produces expendable plastic deformation, thus forms an interspace between metal spiral case 2 and peripheral concrete 4.
The outstanding advantages of this kind of compression clearance spiral case is: under the water pressure load action that flexible material transmits at metal spiral case in unit running process, pressurized produces plastic deformation, form stable compression clearance, thus realize the object controlling the internal water pressure size that volute plate is born more accurately.It avoid cushioning material mechanical property instability and endurance issues in cushioned spiral case structure, metal spiral case bearing capacity can be given full play to, reduce peripheral concrete stressed, improve the integrity of worm frame, be conducive to the stable operation of Hydropower Unit long-term safety, and easy construction, cost are low, durable in use, flexible material and laying scope are also easily selected.
Embodiment 2
As shown in Figure 1, the initial position of flexible material 3 is positioned at the entrance point of metal spiral case 2, and the snail that the end of flexible material 3 is positioned at metal spiral case 2 is to before 310 °.
Flexible material 3 snail is 15 ° to 45 ° positions apart from seat ring 5 upper ring plate to the meridian of section to laying initial position, and flexible material 3 snail is between 90 ° to 225 ° of seat ring 5 upper ring plate to the meridian terminad position of section.
The straight length 1 meridian terminad paving location of described flexible material 3 is no more than below stringcourse 35 °.
The snail of metal spiral case 2 is to referring to the direction extended from metal spiral case straight length 1 end to metal spiral case inside end; Meridian is to referring to the direction on the radially-outer surface of metal spiral case 2, namely if section in Fig. 2 is sub-circular, meridian is to the circumferential surface referring to this sub-circular section, and meridian refers to the diameter in center through the upper and lower ring flat-plate of seat ring 5 and the metal spiral case 2 section center of circle to stringcourse.
Embodiment 3
The present embodiment is substantially identical with the structure of embodiment 2, and, flexible material 3 snail terminad is positioned at the position of metal spiral case 2 along snail to 45 ° from initial position in the present embodiment as depicted in figs. 1 and 2; Metal spiral case 2 meridian lays to flexible material 3 position, 15 °, upper ring plate place that scope starting point is positioned at distance seat ring 5, end is positioned at the position, 225 °, upper ring plate place apart from seat ring 5, flexible material 3 is polystyrene foamed boardss, and its deformation modulus is 0.2MPa, and its thickness is 6mm.
What the compression clearance spiral case of this kind of form can give full play to steel spiral case peripheral concrete 4 pairs of seat rings bonds ability, and improve the global stability of unit, but peripheral concrete 4 quantity of reinforcement is comparatively large, investment increases.
Embodiment 4
The present embodiment is substantially identical with the structure of embodiment 2, and, flexible material 3 snail terminad is positioned at the position of metal spiral case 2 along snail to 310 ° from initial position in the present embodiment as depicted in figs. 1 and 2; Metal spiral case 2 meridian lays to flexible material 3 position, 45 °, upper ring plate place that scope starting point is positioned at distance seat ring 5, end is positioned at the position, 90 °, upper ring plate place apart from seat ring 5, flexible material 3 is polystyrene foamed boardss, and its deformation modulus is 0.2MPa, and its thickness is 6mm.
The compression clearance spiral case of this kind of structural type can give full play to the bearing capacity of metal spiral case self, significantly reduces the quantity of reinforcement of metal spiral case 2 peripheral concrete 4.
The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (8)
1. water turbine compression clearance worm frame, it comprises the concrete (4) of metal spiral case (2) and metal spiral case (2) periphery, the entrance point of metal spiral case (2) is straight-run of pipe section (1), diversion steel pipe is connected with the straight length (1) of metal spiral case entrance point, straight length (1) end is that snail is to 0 ° of section, metal spiral case (2) snail shape structure inner ring place is provided with seat ring (5), it is characterized in that: between metal spiral case (2) and peripheral concrete (4), be fixed with flexible material (3), flexible material (3) pressurized produces plastic deformation, form compression clearance, the power transmission coefficient of flexible material (3) is not more than 50MPa/m, the deformation modulus of flexible material (3) is 0.05MPa to 0.5MPa, the thickness of flexible material (3) is not more than 10mm.
2. water turbine compression clearance worm frame according to claim 1, it is characterized in that: the snail of described flexible material (3) is positioned at the entrance point of metal spiral case (2) to initial position, the snail that the snail terminad of flexible material (3) is positioned at metal spiral case (2) is to before 310 °.
3. water turbine compression clearance worm frame according to claim 1, it is characterized in that: described flexible material (3) snail is 15 ° to 45 ° positions apart from seat ring (5) upper ring plate to the meridian of section to laying initial position, flexible material (3) snail is between 90 ° to 225 ° of seat ring (5) upper ring plate to the meridian terminad position of section.
4. water turbine compression clearance worm frame according to claim 1, is characterized in that: described flexible material (3) is no more than below stringcourse 35 ° at straight length (1) meridian terminad paving location.
5. water turbine compression clearance worm frame according to claim 1, is characterized in that: described flexible material (3) is foam plate.
6. water turbine compression clearance worm frame according to claim 1, is characterized in that: the surface smear matcoveredn of described flexible material (3).
7. water turbine compression clearance worm frame according to claim 1, is characterized in that: the thickness of described flexible material (3) is 4.8mm, and the deformation modulus of flexible material (3) is 0.25MPa.
8. water turbine compression clearance worm frame according to claim 7, is characterized in that: the initial position of described flexible material (3) is positioned at the entrance point of metal spiral case (2), and the end of flexible material (3) is positioned at the snail of metal spiral case (2) to 278 °; Flexible material (3) snail is positioned at upper ring plate 1.25 meters of apart from seat ring (5) to the meridian of section to laying range start point, meridian is positioned at stringcourse place to laying terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410472492.4A CN104234912B (en) | 2014-09-17 | 2014-09-17 | Water turbine compression gap volute structure |
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| CN201410472492.4A CN104234912B (en) | 2014-09-17 | 2014-09-17 | Water turbine compression gap volute structure |
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| CN104234912A true CN104234912A (en) | 2014-12-24 |
| CN104234912B CN104234912B (en) | 2017-02-15 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB140004A (en) * | 1919-08-18 | 1920-03-18 | Harvey Birchard Taylor | Improvements in hydraulic turbines |
| CH624734A5 (en) * | 1977-08-11 | 1981-08-14 | Erich Koessler | Water turbine with vertical axis |
| CN201495533U (en) * | 2009-07-06 | 2010-06-02 | 西安林产化学工厂 | Force-transferring waterproof gasket layer for hydropower station |
| CN201943869U (en) * | 2011-03-14 | 2011-08-24 | 中国水电顾问集团成都勘测设计研究院 | Volute structure of water turbine |
| CN102296577A (en) * | 2011-05-27 | 2011-12-28 | 长江勘测规划设计研究有限责任公司 | Embedding technology of volute combination of large hydroelectric generating set |
| CN102758425A (en) * | 2012-07-23 | 2012-10-31 | 天津大学 | Preloading filling spiral case preloaded seam constructing device of hydropower station and implementing method thereof |
| CN204140263U (en) * | 2014-09-17 | 2015-02-04 | 中国电建集团西北勘测设计研究院有限公司 | Water turbine compression clearance spiral case |
-
2014
- 2014-09-17 CN CN201410472492.4A patent/CN104234912B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB140004A (en) * | 1919-08-18 | 1920-03-18 | Harvey Birchard Taylor | Improvements in hydraulic turbines |
| CH624734A5 (en) * | 1977-08-11 | 1981-08-14 | Erich Koessler | Water turbine with vertical axis |
| CN201495533U (en) * | 2009-07-06 | 2010-06-02 | 西安林产化学工厂 | Force-transferring waterproof gasket layer for hydropower station |
| CN201943869U (en) * | 2011-03-14 | 2011-08-24 | 中国水电顾问集团成都勘测设计研究院 | Volute structure of water turbine |
| CN102296577A (en) * | 2011-05-27 | 2011-12-28 | 长江勘测规划设计研究有限责任公司 | Embedding technology of volute combination of large hydroelectric generating set |
| CN102758425A (en) * | 2012-07-23 | 2012-10-31 | 天津大学 | Preloading filling spiral case preloaded seam constructing device of hydropower station and implementing method thereof |
| CN204140263U (en) * | 2014-09-17 | 2015-02-04 | 中国电建集团西北勘测设计研究院有限公司 | Water turbine compression clearance spiral case |
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| CN104234912B (en) | 2017-02-15 |
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