CN219549019U - Top cover of water pump turbine set - Google Patents
Top cover of water pump turbine set Download PDFInfo
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- CN219549019U CN219549019U CN202320262925.8U CN202320262925U CN219549019U CN 219549019 U CN219549019 U CN 219549019U CN 202320262925 U CN202320262925 U CN 202320262925U CN 219549019 U CN219549019 U CN 219549019U
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- Prior art keywords
- ring plate
- top cover
- plate
- support rib
- water pump
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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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- Hydraulic Turbines (AREA)
Abstract
The utility model relates to the field of water pump and water turbine sets, and particularly discloses a top cover of a water pump and water turbine set, which comprises an upper annular plate, a middle support plate and a lower annular plate, wherein the upper annular plate is connected with the lower annular plate through the middle support plate, the middle support plate comprises a circumferential support rib plate and a radial support rib plate, the circumferential support rib plate and the radial support rib plate are mutually and vertically connected and uniformly connected between the upper annular plate and the lower annular plate, and the circumferential support rib plate is welded with the upper annular plate and the lower annular plate and the radial support rib plate is welded with the upper annular plate and the lower annular plate. The connecting strength of the top cover is improved, and the stress concentration areas connected with the circumferential support rib plates and the radial support rib plates are provided with stress dispersing structures, so that the stress concentration phenomenon is improved.
Description
Technical Field
The utility model relates to the field of water pump turbine sets, in particular to a top cover of a water pump turbine set.
Background
The top cover is used as one of core fixing parts of the water pump turbine unit, and has the dual functions of bearing and overcurrent in the whole unit. The strength, rigidity and safe reliability of the top cover have a crucial influence on the stable operation of the whole unit. In order to meet the continuously-changing load requirements of the power grid, the water pump and water turbine unit needs to undergo severe transient processes such as frequent start and stop, load increase and decrease, load dump and the like in actual operation. The flow transient state in the water pump water turbine in the transient state process is changeable, the water pressure amplitude is far higher than the rated operation working condition of the unit, the top cover structure bears complicated and changeable high-amplitude water pressure, and the stress of the top cover is also changed continuously along with the time and the conversion of the working condition. The high-amplitude unstable axial water thrust in the transient process makes the larger deformation and stress generated by the top cover concentrated, and the serious accidents of cracking, damaging the top cover structure and even destroying and dying the hydropower station can be possibly caused. Therefore, it is significant to study the stress response of the top cover under high-amplitude water pressure during transient conditions for safe operation of the power station.
The generation of the local stress concentration of the top cover is closely related to the geometric design of the top cover except that the local stress concentration of the top cover is related to the hydraulic load directly transmitted by the unit, and the existing measures for eliminating the stress concentration of the top cover are more to add a certain number of rib plates between the upper ring plate of the top cover and the lower ring plate of the top cover, so that the operation is simple, the cost is high, and meanwhile, the flow guiding effect is poor. The improvement of the stress concentration of the top cover by optimizing the geometric structure and the modeling of the top cover is an effective technical method.
Disclosure of Invention
The utility model aims to provide a top cover of a water pump turbine unit, which can improve the supporting strength and the stress concentration phenomenon.
The aim of the utility model can be achieved by the following technical scheme: the utility model provides a water pump turbine group top cap, includes crown block, middle part backup pad and lower crown block, go up the crown block and be connected through the middle part backup pad down between the crown block, the middle part backup pad includes circumference support rib plate and radial support rib plate, circumference support rib plate and radial support rib plate mutually perpendicular connect, and the equipartition is connected between last crown block and lower crown block, between circumference support rib plate and last crown block and the lower crown block and between radial support rib plate and last crown block and the lower crown block welded connection.
In a further scheme, the circumferential rib plates arranged around the circumferential support rib plates are rounded.
In a further scheme, the middle part of lower ring plate is provided with the top cap inner ring plate, radial support rib plate welds in top cap inner ring plate and lower ring plate.
In a further scheme, radial rib plate openings are formed in the lower portion of one end of the radial support rib plate, and radial rib plate rounding is arranged around the radial rib plate openings.
In a further scheme, the radial supporting rib plates are close to the upper annular plate and the lower annular plate and are provided with arc transition sections.
In a further scheme, the circumferential support rib plates and the radial support rib plates are connected in a T shape and are vertically connected between the upper annular plate and the lower annular plate.
In a further aspect, the outer roof bolt flange is further included, and the roof bolt flange is connected between the circumferential support rib plate and the lower ring plate.
In a further scheme, the upper annular plate and the lower annular plate are coaxially arranged, and the circumferential support rib plates and the radial support rib plates are uniformly distributed along the shaft.
In a further scheme, a plurality of guide vane sleeve holes corresponding to each other are uniformly distributed on the upper annular plate and the lower annular plate.
The utility model has the beneficial effects that:
according to the utility model, the connecting strength of the top cover is improved by arranging the vertical circumferential support rib plates and the vertical radial support rib plates, and the stress dispersing structure is arranged in the stress concentration areas where the circumferential support rib plates and the vertical radial support rib plates are connected, so that the stress concentration phenomenon between the circumferential support rib plates and the upper ring plate and between the radial support rib plates and the lower ring plate and the stress concentration phenomenon of each part are eliminated, the whole top cover is prevented from being deformed due to the stress concentration, and damage is caused.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a top cover of a water pump turbine unit according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a stress concentration area of a top cover of a water pump turbine unit according to an embodiment of the utility model.
In the figure: 1. an upper ring plate; 2. a middle support plate; 21. a circumferential support rib; 211. rounding the circumferential rib plates; 22. radial supporting rib plates; 222. radial rib plate openings; 2221. rounding the radial rib plates; 223. an arc-shaped transition section; 3. a lower ring plate; 31. an inner ring plate of the top cover; 4. a top cover bolt flange; 101. and a guide vane sleeve hole.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, a top cover of a water pump turbine unit comprises an upper ring plate 1, a middle support plate 2 and a lower ring plate 3, wherein the upper ring plate 1 and the lower ring plate 3 are connected through the middle support plate 2, and the top cover is characterized in that the middle support plate 2 comprises a circumferential support rib plate 21 and a radial support rib plate 22, the circumferential support rib plate 21 and the radial support rib plate 22 are connected in a mutually perpendicular manner, and are uniformly distributed and connected between the upper ring plate 1 and the lower ring plate 3, and the circumferential support rib plate 21 is welded and connected with the upper ring plate 1 and the lower ring plate 3 and the radial support rib plate 22 is welded and connected with the upper ring plate 1 and the lower ring plate 3.
The upper ring plate 1 and the lower ring plate 3 are generally selected from the existing upper ring plate and lower ring plate, and can be modified into other structures or plate shapes according to the requirements, which can be obtained by those skilled in the art.
The working principle of the top cover of the water pump turbine unit is as follows: the vertical connection's circumference support rib plate 21 and radial support rib plate 22 constitute resistance to compression support and overflow passageway with last annular plate 1 and lower annular plate 3 together, prevent rivers overflow, and be connected as the connecting piece with other subassemblies of unit, the perpendicular equipartition's of circumference support rib plate 21 and radial support rib plate 22 connected mode, but increase compressive strength.
According to the principle of operation of the top cover described above, some preferred embodiment structures are provided, with circumferential rib rounding 211 around the circumferential support rib 21. The circumferential rib rounding 211 can prevent stress concentration when the circumferential support rib 21 is connected at an acute angle between the upper ring plate and the lower ring plate.
The middle part of the lower annular plate 3 is provided with a top cover inner annular plate 31, and the radial supporting rib plates 22 are welded on the top cover inner annular plate 31 and the lower annular plate 3. This can improve the connection strength of the lower ring plate 3.
A radial rib opening 222 is formed at the lower part of one end of the radial support rib 22, and radial rib rounding 2221 is arranged around the radial rib opening 222. The radial support rib plate 22 is provided with an arc-shaped transition section 223 near the upper ring plate 1 and the lower ring plate 3, and the radial rib plate openings 222 can disperse stress concentration at one end of the lower part of the radial support rib plate 22. The radial rib radius 2221 may distribute stress concentrations within the radial rib apertures 222. The arcuate transition 223 distributes stress concentrations of the radial support rib 22 near the central axial direction of the upper and lower annular plates.
The circumferential support rib 21 and the radial support rib 22 are connected in a T-shape and are connected vertically between the upper ring plate 1 and the lower ring plate 3. The T-shaped connection can reliably support the upper annular plate 1 and the lower annular plate 3 from the radial direction and the axial direction of the upper annular plate 1 and the lower annular plate 3, and the supporting strength of the whole top cover can be improved.
And further comprises a top cover bolt flange 4, wherein the top cover bolt flange 4 is connected between the circumferential support rib plate 21 and the lower ring plate 3. The head bolt flange 4 can strengthen the connection strength between the circumferential support rib 21 and the lower ring plate 3.
The upper annular plate 1 and the lower annular plate 3 are coaxially arranged, and the circumferential support rib plates 21 and the radial support rib plates 22 are uniformly distributed along the shaft. This prevents the occurrence of deformation due to uneven distribution of the circumferential support rib plates 21 and the radial support rib plates 22 in the upper ring plate 1 and the lower ring plate 3, and uneven stress generated when the upper ring plate and the lower ring plate are subjected to a force.
A plurality of guide vane sleeve holes 101 corresponding to each other are uniformly distributed on the upper annular plate 1 and the lower annular plate 3. The guide vane sleeve hole 101 is used for the connection of the guide vane sleeve. The guide vane sleeve holes 101 are inconvenient to concentrate stress, and the stress generated on the upper ring plate 1 and the lower ring plate 3 due to the connection of the guide vane sleeve can be further evenly dispersed through the circumferentially uniformly distributed connection.
Through some structures of the stress concentration removal, such as the circumferential rib rounding 211, the radial rib openings 222, the radial rib rounding 2221, the arc-shaped transition section 223 and the like, the stress concentration at the position shown in fig. 2 can be further prevented, so that the structure of the top cover has low conversion frequency along with the time and the conversion of working conditions in the process of overflowing high-amplitude unstable water, and the pressure is resisted and dispersed at multiple positions, and in the process of overflowing high-amplitude unstable axial water, the unstable water thrust is prevented to cause the top cover to generate larger deformation and stress concentration, thereby damaging the structure connected with the top cover and the top cover.
In actual use, a person skilled in the art can design a proper thickness according to the stress value of the parts to improve the stress adapting to the position of the parts, for example, the thickness of a supporting rib plate is increased by 10% on the thickness of the existing common rib plate, so as to reduce the stress value of the supporting rib plate; the inner thickness of the lower annular plate is increased by 70 percent so as to reduce the stress value at the inner surface of the lower annular plate; the outer edge side of the supporting rib plate is not perforated as much as possible, so that the stress value of the outer edge side of the supporting rib plate is reduced.
After all structures of the top cover are changed, the pressure applied to the top cover is 1.5 times of the maximum water head, and compared with the original structure, the maximum stress value at the top cover is reduced by 50%.
It should be noted that the terms "first," "second," and the like herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein. In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (9)
1. The utility model provides a water pump turbine group top cap, includes upper ring plate (1), middle part backup pad (2) and lower ring plate (3), go up between ring plate (1) and lower ring plate (3) through middle part backup pad (2) connection, a serial communication port, middle part backup pad (2) are including circumference support floor (21) and radial support floor (22), circumference support floor (21) and radial support floor (22) mutually perpendicular connect, and the equipartition is connected between upper ring plate (1) and lower ring plate (3), circumference support floor (21) and upper ring plate (1) and lower ring plate (3) between and radial support floor (22) and upper ring plate (1) and lower ring plate (3) between welded connection.
2. A water pump and turbine set top cover as claimed in claim 1, characterized in that the circumferential support rib (21) has circumferential rib rounding (211) around it.
3. A water pump turbine set top cover according to claim 1, characterized in that the middle part of the lower ring plate (3) is provided with a top cover inner ring plate (31), and the radial support rib plates (22) are welded on the top cover inner ring plate (31) and the lower ring plate (3).
4. The water pump and turbine set top cover according to claim 1, wherein a radial rib opening (222) is formed at a lower portion of one end of the radial support rib (22), and radial rib rounding (2221) is formed around the radial rib opening (222).
5. A water pump turbine set top cover as claimed in claim 1, characterized in that the radial support ribs (22) are arranged adjacent to the upper ring plate (1) and the lower ring plate (3) with an arcuate transition (223).
6. A water pump turbine set top cover according to claim 1, characterized in that the circumferential support rib (21) and the radial support rib (22) are connected in a T-shape and are connected vertically between the upper ring plate (1) and the lower ring plate (3).
7. A water pump turbine set top cover according to claim 1, further comprising an outer top cover bolt flange (4), said top cover bolt flange (4) being connected between the circumferential support rib (21) and the lower ring plate (3).
8. The top cover of the water pump and water turbine unit according to claim 1, wherein the upper annular plate (1) and the lower annular plate (3) are coaxially arranged, and the circumferential support rib plates (21) and the radial support rib plates (22) are uniformly distributed along the shaft.
9. The top cover of a water pump and water turbine set according to any one of claims 1 to 8, wherein a plurality of guide vane sleeve holes (101) corresponding to each other are uniformly distributed on the upper ring plate (1) and the lower ring plate (3) in circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320262925.8U CN219549019U (en) | 2023-02-20 | 2023-02-20 | Top cover of water pump turbine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320262925.8U CN219549019U (en) | 2023-02-20 | 2023-02-20 | Top cover of water pump turbine set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219549019U true CN219549019U (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320262925.8U Active CN219549019U (en) | 2023-02-20 | 2023-02-20 | Top cover of water pump turbine set |
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| Country | Link |
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| CN (1) | CN219549019U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117889029A (en) * | 2024-03-15 | 2024-04-16 | 东方电气集团东方电机有限公司 | Water turbine top cover and water turbine |
-
2023
- 2023-02-20 CN CN202320262925.8U patent/CN219549019U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117889029A (en) * | 2024-03-15 | 2024-04-16 | 东方电气集团东方电机有限公司 | Water turbine top cover and water turbine |
| CN117889029B (en) * | 2024-03-15 | 2024-05-24 | 东方电气集团东方电机有限公司 | Water turbine top cover and water turbine |
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