CN214171330U - High-rotating-speed water turbine main shaft sealing device - Google Patents
High-rotating-speed water turbine main shaft sealing device Download PDFInfo
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- CN214171330U CN214171330U CN202022986535.4U CN202022986535U CN214171330U CN 214171330 U CN214171330 U CN 214171330U CN 202022986535 U CN202022986535 U CN 202022986535U CN 214171330 U CN214171330 U CN 214171330U
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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 application relates to a high-rotating-speed water turbine main shaft sealing device, which relates to the field of turbomachines and comprises a sealing ring arranged on the inner wall of a turbine ring, wherein an installation ring arranged along the circumference of the sealing ring is additionally arranged at one end, away from a main shaft, of the sealing ring, the cross section of the installation ring is circular, and the installation ring is arranged in a hollow manner; the mounting groove has been seted up on the ring inner wall, and the collar inlays and locates in the mounting groove. The machine ring is additionally provided with a speed reducing ring for reducing the water flow speed, and is also provided with a first diversion trench and a first diversion pipe for guiding water, wherein the first diversion trench is positioned above the speed reducing ring. The top of the machine ring is provided with a first encryption ring with a capping effect. This application has the effect that improves sealed effect.
Description
Technical Field
The application relates to the field of turbomachines, in particular to a high-rotating-speed water turbine main shaft sealing device.
Background
The hydraulic turbine is a power machine for converting the energy of water flow into rotary mechanical energy, and belongs to the turbine machinery in fluid machinery. Most hydraulic turbines are installed in hydroelectric power stations and are used for driving generators to generate electricity. In a hydropower station, water in an upstream reservoir is guided to a water turbine through a water guide pipe to push a water turbine runner to rotate so as to drive a generator to generate electricity. In order to prevent water inside the water turbine from flowing to the outside of the water turbine from the rotating connection position of the main shaft of the water turbine and the rack, the connection position of the main shaft of the water turbine and the rack needs to be sealed.
At present, the main shaft of the water turbine is sealed at the joint with the frame, as shown in fig. 3, the water turbine comprises a main shaft 1 and a machine ring 2, the main shaft 1 is vertically arranged and is inserted into the machine ring 2, and the main shaft 1 is rotatably connected with the frame. The top of the main shaft 1 penetrates through the machine ring 2 to be positioned outside the water turbine, and the bottom of the main shaft 1 also penetrates through the machine ring 2 to be positioned inside the water turbine. A sealing ring 3 made of rubber materials is arranged at one end, close to the bottom of the main shaft 1, of the machine ring 2, the sealing ring 3 is embedded on the side wall of the machine frame, and the sealing ring 3 abuts against the outer wall of the main shaft 1.
In view of the above-mentioned related art, when the water turbine operates at a high speed, water inside the water turbine is high-pressure water, and the high-pressure water impacts the seal ring 3 to deform the seal ring 3, so that a gap is generated, and a small amount of high-pressure water flows through the gap between the seal ring 3 and the main shaft 1, and the inventor thinks that the defect that the sealing effect between the main shaft 1 and the machine ring 2 of the water turbine is poor exists.
SUMMERY OF THE UTILITY MODEL
In order to improve the sealed effect of hydraulic turbine main shaft and quick-witted ring, this application provides a high rotational speed hydraulic turbine main shaft sealing device.
The application provides a high rotational speed hydraulic turbine main shaft sealing device adopts following technical scheme:
a high-rotation-speed water turbine main shaft sealing device comprises a sealing ring arranged on the inner wall of a turbine ring, wherein an installation ring arranged along the circumference of the sealing ring is additionally arranged at one end of the sealing ring, which is far away from a main shaft, the cross section of the installation ring is circular, and the installation ring is arranged in a hollow manner; the mounting groove has been seted up on the quick-witted ring inner wall, the collar inlays and locates in the mounting groove.
Through adopting above-mentioned technical scheme, the collar that cavity set up can produce bigger deformation, and under the initial condition, the sealing washer butt is on the main shaft outer wall to make the collar change and produce one and compress tightly the power on the main shaft outer wall with the sealing washer, make the pressure between sealing washer and the main shaft increase, the water under high pressure then is more difficult to pass from between sealing washer and the main shaft, thereby reduces the condition that the water under high pressure passed the sealing washer, and then improves sealed effect.
Optionally, a first diversion trench is formed in the machine ring and located above the sealing ring, and a first diversion pipe communicated with the first diversion trench is additionally arranged on the machine ring.
Through adopting above-mentioned technical scheme, after water enters from the sealing washer, can follow first guiding gutter flow direction to the quick-witted ring outside to reduce the water that flows out from the quick-witted ring top.
Optionally, the inner wall of the ring below the first diversion trench is in clearance fit with the main shaft.
By adopting the technical scheme, the high-pressure water still flows at a high speed when passing through the sealing ring, and a gap is reserved between the bottom of the machine ring and the main shaft, so that the water can be buffered after entering from the sealing ring, the flowing speed of the water is reduced, the condition that the water is flushed to the top of the machine ring is reduced, and the sealing effect is improved.
Optionally, a plurality of first encryption rings are additionally arranged on the inner wall of the machine ring above the first diversion trench, each first encryption ring comprises an abutting part and a fixing part, the cross section of each abutting part is flaky, and one side, close to the main shaft, of each abutting part abuts against the outer wall of the main shaft; the fixing part is fixed on the inner wall of the machine ring.
By adopting the technical scheme, the arrangement of the first encryption ring can reduce the water flowing out of the top of the ring after passing through the first diversion trench; when the abutting part is in contact with the spindle for a period of time, the gap between the abutting part and the spindle is very small, and the sealing effect is good.
Optionally, a speed reducing ring for reducing the water flow speed is additionally arranged between the first diversion trench and the sealing ring, and the speed reducing ring is abutted to the outer wall of the main shaft.
Through adopting above-mentioned technical scheme, water still has certain speed after passing through from the sealing washer, and the velocity of flow of this part of water can be reduced to the speed reduction ring for water storage is between speed reduction ring and the sealing washer, is held full back by water between speed reduction ring and the sealing washer, and water overflows slowly from between speed reduction ring and the main shaft, realizes reducing the effect of velocity of water.
Optionally, an annular sealing plate is additionally arranged between the first diversion trench and the speed reduction ring, the sealing plate comprises a contact part abutted against the outer wall of the main shaft and an embedded part embedded on the machine ring, and the embedded part is positioned on one side of the contact part, which is far away from the main shaft; the cross section of the contact part is rectangular, and the side surface of the contact part close to the main shaft is abutted against the outer wall of the main shaft; the cross section of the embedding part is trapezoidal, and the upper bottom of the cross section of the embedding part and the contact part are integrally arranged.
By adopting the technical scheme, the sealing plate is made of alloy, the gap between the contact part and the main shaft is less, and the water flow passing through the sealing plate can be reduced.
Optionally, a second diversion trench and a second diversion tube communicated with the second diversion trench are further added between the first encryption ring and the first diversion trench, and a sealing plate is arranged between the second diversion trench and the first diversion trench.
By adopting the technical scheme, one sealing is added, and the sealing effect is improved.
Optionally, a third guide groove and a third guide pipe communicated with the third guide groove are further added between the second guide groove and the first encryption ring, and a plurality of second encryption rings are added between the third guide groove and the second guide groove.
By adopting the technical scheme, the sealing and the flow guiding of the bottom protection are increased, and the sealing effect is improved.
Optionally, the mounting ring is detachably connected to the machine ring.
By adopting the technical scheme, the installation and the replacement of the sealing ring and the mounting ring are convenient.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the hollow mounting ring can generate larger deformation, so that the pressure between the sealing ring and the main shaft is increased, and high-pressure water is more difficult to penetrate through the space between the sealing ring and the main shaft, so that the condition that the high-pressure water penetrates through the sealing ring is reduced, and the sealing effect is improved;
2. the water in the ring is guided out through the additionally arranged first guide groove and the first guide pipe, so that the overflow of the water from the top of the ring is reduced;
3. the flow velocity of water during passing is reduced by the additionally arranged speed reducing ring;
4. the sealing performance between the main shaft and the machine ring is improved by additionally arranging the first encryption ring, the second encryption ring and the sealing plate.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is an enlarged view of the portion A in FIG. 1;
fig. 3 is a schematic view of a seal ring in the related art.
Description of reference numerals: 1. a main shaft; 2. a machine ring; 21. mounting grooves; 22. mounting blocks; 3. a seal ring; 4. a mounting ring; 51. a first diversion trench; 52. a second guiding gutter; 53. a third guiding gutter; 61. a first draft tube; 62. a second draft tube; 63. a third draft tube; 71. a first encryption ring; 711. an abutting portion; 712. a fixed part; 72. a second encryption ring; 8. a sealing plate; 81. a contact portion; 82. an embedding part; 9. a speed reduction ring.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses high rotational speed hydraulic turbine main shaft sealing device. Referring to fig. 1, the water turbine includes main shaft 1 and machine ring 2, and main shaft 1 is vertical to be set up, and machine ring 2 cup joints in main shaft 1 outside, and machine ring 2 is connected with main shaft 1 rotation. The bottom of the main shaft 1 penetrates through the machine ring 2 and is positioned inside the water turbine, and the top of the main shaft 1 penetrates through the machine ring 2 and is positioned outside the machine ring 2. The sealing device comprises a sealing ring 3, a mounting ring 4 integrally arranged with the sealing ring 3, a speed reducing ring 9 arranged above the sealing ring 3, a sealing plate 8 arranged above the speed reducing ring 9, a first diversion groove 51 arranged above the sealing plate 8 and a first diversion pipe 61 communicated with the first diversion groove 51.
The cross section of sealing washer 3 is the rectangle to sealing washer 3 supports tightly on the outer wall of main shaft 1 towards the side of main shaft 1, and collar 4 is located one side that sealing washer 3 deviates from main shaft 1. The cross section of the mounting ring 4 is circular and the mounting ring 4 is hollow, so that the mounting ring 4 can have a large amount of deformation. In an initial state, the sealing ring 3 is abutted against the outer wall of the main shaft 1, the mounting ring 4 has certain deformation, force generated by the deformation of the mounting ring 4 is transmitted to the sealing ring 3, so that the pressure between the sealing ring 3 and the outer wall of the main shaft 1 is increased, the sealing ring 3 and the main shaft 1 are more compact, and water passing between the sealing ring 3 and the main shaft 1 is reduced. The main shaft 1 rotates at a high speed, and the sealing ring 3 is still in a deformation state due to the mounting ring 4 after being worn, so that the sealing ring 3 still abuts against the outer wall of the main shaft 1 even if being worn.
Because sealing washer 3 and the inseparable laminating of main shaft 1, main shaft 1 rotates at a high speed, and the wearing and tearing of sealing washer 3 are very fast, for the change of convenient sealing washer 3, are equipped with mounting groove 21 and installation piece 22 in 2 bottoms of ring, are equipped with the groove corresponding with sealing washer 3 and collar 4 on mounting groove 21 and the installation piece 22, when installation piece 22 passes through the bolt fastening on mounting groove 21, form the cavity that is used for placing sealing washer 3 and collar 4 between installation piece 22 and the mounting groove 21.
Because water still has certain speed after the sealing washer 3, in order to reduce this partial water's speed, increase above sealing washer 3 and be equipped with speed reduction ring 9, speed reduction ring 9 supports on main shaft 1 outer wall to machine ring 2 bottom inner wall and main shaft 1 outer wall clearance fit. After water passes through the sealing ring 3, the water with a certain speed is flushed to the speed reducing ring 9 for speed reduction and stored in a gap between the sealing ring 3 and the speed reducing ring 9, and when the gap is filled with the water, the water enters the speed reducing ring 9 to the position above the speed reducing ring 9.
Referring to fig. 1 and 2, the sealing plate 8 includes a contact portion 81 and an insertion portion 82, and the contact portion 81 and the insertion portion 82 are integrally provided. The cross section of the contact part 81 is rectangular, the side surface of the contact part 81 close to the main shaft 1 abuts against the outer wall of the main shaft 1, the embedding part 82 is positioned on the side surface of the contact part 81 departing from the main shaft 1, and the cross section of the embedding part 82 is trapezoidal. The upper bottom of the cross section of the embedding part 82 is connected with the contact part 81, and the lower bottom of the cross section of the embedding part 82 is positioned on one side of the embedding part 82, which is far away from the contact part 81. The machine ring 2 is provided with a groove corresponding to the shape of the embedding part 82, and the embedding part 82 is embedded on the machine ring 2. The contact part 81 and the embedding part 82 are made of alloy, and the contact part 81 is tightly attached to the outer wall of the main shaft 1 and has a certain sealing effect.
Referring to fig. 1, the first guide groove 51 is formed along a circumference of the inner wall of the machine ring 2, the first guide pipe 61 connects the first guide groove 51 with the outside of the machine ring 2, and when water enters the first guide groove 51 from the sealing plate 8, the water flows to the outside of the turbine along the first guide pipe 61, thereby reducing the water entering the gap between the main shaft 1 and the machine ring 2.
With reference to fig. 1 and 2, in order to further improve the sealing effect of the sealing device, a second guiding groove 52 is formed above the first guiding groove 51, and a sealing plate 8 is inserted between the first guiding groove 51 and the second guiding groove 52. A second diversion pipe 62 is further added on the machine ring 2, and the second diversion trench 52 is communicated with the outside of the machine ring 2 through the second diversion pipe 62.
In case of accident, a third guide groove 53 is added above the second guide groove 52, and two first encryption rings 71 for capping are added above the third guide groove 53. A second encryption ring 72 and a sealing plate 8 are arranged between the third guide groove 53 and the second guide groove 52. A third flow guide pipe 63 is additionally arranged on the machine ring 2, and the third flow guide groove 53 is communicated with the outside of the machine ring 2 through the third flow guide pipe 63.
The first encryption ring 71 is an annular copper bar, the first encryption ring 71 comprises an abutting part 711 and a fixing part 712, the cross section of the abutting part 711 is sheet-shaped, and the thinner end of the abutting part 711 abuts against the outer wall of the spindle 1. The fixing part 712 is integrally provided with the contact part 711, the cross section of the fixing part 712 is rectangular, a groove corresponding to the fixing part 712 is formed in the inner part of the ring 2, and the fixing part 712 is mounted on the inner wall of the ring 2. The second encryption ring 72 conforms to the structure of the first encryption ring 71.
The implementation principle of the embodiment of the application is as follows: the sealing ring 3 keeps most of the water in the water turbine, and a small part of the water enters the first diversion trench 51 through the speed reducing ring 9 and the sealing plate 8 and flows out of the turbine ring 2 along the first diversion pipe 61. And part of water enters the second guide groove 52 through the sealing plate 8 between the first guide groove 51 and the second guide groove 52 and stays outside the ring 2 along the second guide pipe 62. The second encryption ring 72, the third guiding groove 53 and the first encryption ring 71 are further sealed to prevent a small amount of water from passing through the second encryption ring 72.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a high rotational speed hydraulic turbine main shaft sealing device, is including setting up sealing washer (3) on quick-witted ring (2) inner wall, its characterized in that: an installation ring (4) arranged along the circumference of the sealing ring (3) is additionally arranged at one end of the sealing ring (3) departing from the main shaft (1), the cross section of the installation ring (4) is circular, and the installation ring (4) is arranged in a hollow mode; the inner wall of the machine ring (2) is provided with a mounting groove (21), and the mounting ring (4) is embedded in the mounting groove (21).
2. The high-speed water turbine main shaft sealing device according to claim 1, wherein: a first diversion trench (51) positioned above the sealing ring (3) is formed in the machine ring (2), and a first diversion pipe (61) communicated with the first diversion trench (51) is additionally arranged on the machine ring (2).
3. The high-speed water turbine main shaft sealing device according to claim 2, wherein: the inner wall of the machine ring (2) below the first diversion trench (51) is in clearance fit with the main shaft (1).
4. A high-speed water turbine main shaft sealing device according to claim 3, wherein: a plurality of first encryption rings (71) are additionally arranged on the inner wall of the machine ring (2) above the first flow guide groove (51), each first encryption ring (71) comprises an abutting part (711) and a fixing part (712), the cross section of each abutting part (711) is sheet-shaped, and one side, close to the main shaft (1), of each abutting part (711) abuts against the outer wall of the main shaft (1); the fixing part (712) is fixed on the inner wall of the machine ring (2).
5. The high-speed water turbine main shaft sealing device according to claim 4, wherein: a speed reducing ring (9) used for reducing the water flow speed is additionally arranged between the first diversion trench (51) and the sealing ring (3), and the speed reducing ring (9) is abutted to the outer wall of the main shaft (1).
6. The high-speed water turbine main shaft sealing device according to claim 5, wherein: an annular sealing plate (8) is additionally arranged between the first guide groove (51) and the speed reducing ring (9), the sealing plate (8) comprises a contact part (81) abutted to the outer wall of the main shaft (1) and an embedded part (82) embedded on the machine ring (2), and the embedded part (82) is positioned on one side, away from the main shaft (1), of the contact part (81); the cross section of the contact part (81) is rectangular, and the side surface, close to the main shaft (1), of the contact part (81) abuts against the outer wall of the main shaft (1); the cross section of the embedding part (82) is trapezoidal, and the upper bottom of the cross section of the embedding part (82) and the contact part (81) are integrally arranged.
7. The high-speed water turbine main shaft sealing device according to claim 6, wherein: a second guide groove (52) and a second guide pipe (62) communicated with the second guide groove (52) are additionally arranged between the first encryption ring (71) and the first guide groove (51), and a sealing plate (8) is arranged between the second guide groove (52) and the first guide groove (51).
8. The high-speed water turbine main shaft sealing device according to claim 7, wherein: a third guide groove (53) and a third guide pipe (63) communicated with the third guide groove (53) are additionally arranged between the second guide groove (52) and the first encryption ring (71), and a plurality of second encryption rings (72) are additionally arranged between the third guide groove (53) and the second guide groove (52).
9. The high-speed water turbine main shaft sealing device according to claim 1, wherein: the mounting ring (4) is detachably connected to the machine ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022986535.4U CN214171330U (en) | 2020-12-09 | 2020-12-09 | High-rotating-speed water turbine main shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022986535.4U CN214171330U (en) | 2020-12-09 | 2020-12-09 | High-rotating-speed water turbine main shaft sealing device |
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| Publication Number | Publication Date |
|---|---|
| CN214171330U true CN214171330U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022986535.4U Active CN214171330U (en) | 2020-12-09 | 2020-12-09 | High-rotating-speed water turbine main shaft sealing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876700A (en) * | 2022-06-13 | 2022-08-09 | 大唐雅安电力开发有限公司 | Water turbine maintenance sealing method and device based on air sealing |
-
2020
- 2020-12-09 CN CN202022986535.4U patent/CN214171330U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876700A (en) * | 2022-06-13 | 2022-08-09 | 大唐雅安电力开发有限公司 | Water turbine maintenance sealing method and device based on air sealing |
| CN114876700B (en) * | 2022-06-13 | 2024-02-13 | 大唐雅安电力开发有限公司 | Water turbine maintenance sealing method based on air sealing |
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