CN220285900U - End face combined sealing structure of movable guide vane of hydroelectric generating set - Google Patents
End face combined sealing structure of movable guide vane of hydroelectric generating set Download PDFInfo
- Publication number
- CN220285900U CN220285900U CN202321616279.7U CN202321616279U CN220285900U CN 220285900 U CN220285900 U CN 220285900U CN 202321616279 U CN202321616279 U CN 202321616279U CN 220285900 U CN220285900 U CN 220285900U
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- China
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- sealing strip
- face
- terminal surface
- guide vane
- movable guide
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- 238000007789 sealing Methods 0.000 title claims abstract description 190
- 239000000758 substrate Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 14
- 239000010949 copper Substances 0.000 description 14
- 229920002635 polyurethane Polymers 0.000 description 12
- 239000004814 polyurethane Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 229920000459 Nitrile rubber Polymers 0.000 description 10
- 238000007790 scraping Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Hydraulic Turbines (AREA)
Abstract
The utility model provides a hydroelectric set movable guide vane terminal surface modular seal structure, including installing first clamp plate and the second clamp plate on the base ring, constitute the draw-in groove structure in the middle of first clamp plate and the second clamp plate, be equipped with the terminal surface sealing strip device that can contract in the draw-in groove structure, terminal surface sealing strip device terminal surface protrusion is in the terminal surface of draw-in groove structure up end in order to contact movable guide vane, terminal surface sealing strip device eccentric in the line one side of the stator axle of adjacent movable guide vane arranges, the middle part that terminal surface sealing strip device is close to one side of base ring is equipped with the middle part and supports the sealing strip, the middle part supports the sealing strip both sides and is equipped with side support sealing strip and cavity portion respectively, side support sealing strip establishes in the one side of the line that is close to the stator axle, side support sealing strip and middle part support sealing strip and be used for supporting terminal surface sealing strip device, the sealed problem of hydraulic turbine stator terminal surface has been solved.
Description
Technical Field
The utility model relates to the field of sealing of guide vane end surfaces of water turbines, in particular to a combined sealing structure of a movable guide vane end surface of a water turbine generator set.
Background
The movable guide vane of the hydroelectric generating set plays a role in adjusting the inflow of the generated water, and is in the shape of a columnar body with an airfoil section. The upper part and the lower part of the movable guide vane are rotating shafts, the lower shaft is arranged in the bottom ring, the upper shaft is arranged in the top cover, and the hydraulic servomotor is used for controlling the opening and closing of a plurality of guide vanes, so that the aim of controlling the rotating speed of the water turbine is fulfilled. The upper end face of the movable guide vane is contacted with the top cover, the lower end face is contacted with the bottom ring, a certain gap is needed between the upper end face and the lower end face when the movable guide vane rotates, but the gap is needed to be sealed when the movable guide vane is closed to prevent water flow, so that the movable guide vane is sealed on a sealing line between the movable guide vane and the top cover and between the movable guide vane and the bottom ring, and the sealing is easy to cause damage and falling phenomena under the long-term flushing of the water flow and the scraping of the guide vane.
The original sealing of the end face of the guide vane of the hydroelectric generating set adopts a form of soft sealing in a groove of a bottom ring or a top cover, for example, a nitrile rubber strip is fixed in a dovetail groove of the bottom ring. Along with the increase of the operation time, the sealing strips are easily broken and fall off due to long-time water flow soaking and flushing and the touching of the sealing strips by the guide vane switching process. After the defects are continuously exposed, various improvement methods are continuously researched, and the modes of zigzag combined sealing, steel bar combined sealing, polyurethane sealing, combined sealing of sealing pressing plates and the like are continuously tested, but the ageing resistance and extrusion scouring resistance cannot be met. The utility model provides a set of combination formula terminal surface seal structure has been designed, adopts the mode of metal seal briquetting, polyurethane sealing strip, nitrile rubber sealing strip combination, the sealing failure too fast problem that the factors such as the sealing strip long-term under water soaking, scouring, scraping with the stator caused that can be fine.
Disclosure of Invention
The utility model provides a combined sealing structure for the end face of a movable guide vane of a water turbine generator set, which solves the problem of sealing the end face of the guide vane of the water turbine.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a hydroelectric set movable guide vane terminal surface combination formula seal structure, including installing first clamp plate and the second clamp plate on the base ring, constitute the draw-in groove structure in the middle of first clamp plate and the second clamp plate, be equipped with the terminal surface sealing strip device that can contract in the draw-in groove structure, terminal surface sealing strip device terminal surface protrusion is in the terminal surface of draw-in groove structure up end in order to contact movable guide vane, terminal surface sealing strip device eccentric in the line one side of the guide vane axle of adjacent movable guide vane arranges, the middle part of one side that terminal surface sealing strip device is close to the base ring is equipped with the middle part and supports the sealing strip, the middle part supports the sealing strip both sides and is equipped with side support sealing strip and cavity portion respectively, side support sealing strip is established in one side that is close to the line of guide vane axle, side support sealing strip and middle part support sealing strip and be used for supporting terminal surface sealing strip device.
In the preferred scheme, one side both ends that end face sealing strip device is close to the bottom ring still are equipped with joint supporting part, and joint supporting part is used for backstop end face sealing strip device, is equipped with the clearance between joint supporting part and the bottom ring, and the side support sealing strip is established in the clearance of one side near the line of stator axle.
In the preferred scheme, terminal surface sealing strip device includes terminal surface contact strip and sealing strip base member, and the sealing strip base member is equipped with the location arch, and the terminal surface contact strip is equipped with the constant head tank, and the location arch is with constant head tank joint, still is equipped with the linking screw, and terminal surface contact strip passes through linking screw connection with the sealing strip base member.
In the preferred scheme, one side of the end face sealing strip device, which is close to the bottom ring, is provided with an inner groove, and the middle supporting sealing strip is arranged in the inner groove.
In the preferred scheme, the end face sealing strip device is kept away from the one side both ends of base ring and is equipped with chamfer portion.
The beneficial effects of the utility model are as follows: the combined type vertical face sealing structure is convenient to assemble, disassemble and replace, and labor intensity is reduced; the side support sealing strips and the cavity part are in asymmetric design, and the eccentric design of the end face sealing strip device and the installation mode of the guide vane central line are matched, so that the end face sealing strip device is slightly inclined when being pressed, and in the frequent action process of the movable guide vane, the scraping influence of the end face of the movable guide vane and the sealing strip can be reduced due to the special design of sealing, and the sealing service life is prolonged.
Drawings
The utility model is further described below with reference to the drawings and examples.
Fig. 1 is a top view of the present utility model.
Fig. 2 is a cross-sectional view of the present utility model.
Fig. 3 is a schematic view of the replaceable structure of the end contact strip of the present utility model.
In the figure: a bottom ring 1; a first platen 2; a connecting bolt 3; bolt holes 4; side support sealing strips 5; an end face seal means 6; an end surface contact bar 601; a seal strip substrate 602; a chamfer 603; a clamping support 604; engagement screw 605; positioning projections 606; an inner groove 607; the middle part supports a sealing strip 7; a second platen 8; a vane shaft 9; a movable guide vane 10; a cavity 11.
Detailed Description
Example 1:
as shown in fig. 1-3, a combined sealing structure for movable guide vane end faces of a hydroelectric generating set comprises a first pressing plate 2 and a second pressing plate 8 which are mounted on a bottom ring 1, wherein a clamping groove structure is formed between the first pressing plate 2 and the second pressing plate 8, an end face sealing strip device 6 capable of shrinking is arranged in the clamping groove structure, the end face of the end face sealing strip device 6 protrudes out of the upper end face of the clamping groove structure to contact with the end face of a movable guide vane 10, the end face sealing strip device 6 is arranged eccentrically to one side of a connecting line of a guide vane shaft 9 of an adjacent movable guide vane 10, a middle supporting sealing strip 7 is arranged in the middle of one side of the end face sealing strip device 6 close to the bottom ring 1, side supporting sealing strips 5 and a cavity part 11 are respectively arranged on two sides of the middle supporting sealing strip 7, the side supporting sealing strips 5 are arranged on one side of the connecting line close to the guide vane shaft 9, the side supporting sealing strips 5 and the middle supporting sealing strip 7 are elastic, the side supporting sealing strips 5 and the middle supporting sealing strip 7 are used for supporting the end face sealing strip device 6, and two ends of one side of the end face sealing strip device 6 far from the bottom ring 1 are provided with chamfer parts 603.
The first pressing plate 2 and the second pressing plate 8 are provided with bolt holes 4, and are connected with the bottom ring 1 through connecting bolts 3.
In the preferred scheme, the end face sealing strip device 6 is close to the one side both ends of the base ring 1 and still is equipped with joint supporting part 604, and joint supporting part 604 is used for backstop end face sealing strip device 6, is equipped with the clearance between joint supporting part 604 and the base ring 1, and the side support sealing strip 5 is established in the clearance of one side of the line that is close to stator vane axle 9.
When the movable guide vane 10 is closed, the connecting line of the guide vane shaft 9 is the guide vane central line, and as the end face sealing strip device 6 is biased to one side of the guide vane central line, one of the adjacent two movable guide vanes 10 is contacted with the end face sealing strip device 6 firstly, and the other is contacted with the end face sealing strip device 6 later.
The clamping support portion 604 can prevent the end face sealing strip device 6 from falling out of the clamping groove structure, the side support sealing strip 5 is arranged in a gap at one side of a connecting line close to the guide vane shaft 9, a cavity portion 11 is formed in the other gap, when the movable guide vane 10 is closed, the side of the end face sealing strip device 6 close to the cavity portion 11 is pressed, the other side of the end face sealing strip device 6 is supported by the side support sealing strip 5, the middle portion of the end face sealing strip device 6 is supported by the cavity portion 11, and due to the fact that the end face sealing strip device 6 is in clearance fit with the clamping groove structure, a tiny gap exists, the end can be slightly lowered in the allowable range of the gap when the end face sealing strip device 6 is pressed, the sealing face of the end face sealing strip device 6 in contact with the end face of the movable guide vane 10 forms a tiny inclination angle, and transverse friction impact on the end face sealing strip device 6 is reduced.
Subsequently, the movable vane 10 continues to close and press down the end face sealing strip device 6 so that the end face sealing strip device 6 is entirely retracted, and the other movable vane 10 starts to rotate right above the end face sealing strip device 6 at this time, but since the end face sealing strip device 6 has been pressed down for a certain distance, the other movable vane 10 does not generate a large friction impact to the end face sealing strip device 6.
When two adjacent movable guide vanes 10 are closed in place, under the action of the elastic force of the side support sealing strips 5 and the middle support sealing strip 7, the end surface sealing strip device 6 is jacked up again, and the end surfaces are attached to the end surfaces of the two movable guide vanes 10 to form effective sealing.
The middle supporting sealing strip 7 is made of polyurethane, the side supporting sealing strips 5 are made of nitrile rubber, and are made of materials with different elasticity, so that the two materials have different fatigue lives, the simultaneous failure is avoided, and the reliability of the combined use is improved.
In the preferred scheme, end face sealing strip device 6 includes end face contact strip 601 and sealing strip base 602, and sealing strip base 602 is equipped with location arch 606, and end face contact strip 601 is equipped with the constant head tank, and location arch 606 and constant head tank joint still are equipped with linking screw 605, and end face contact strip 601 passes through linking screw 605 with sealing strip base 602 and is connected.
The cross section of the end surface contact strip 601 is concave, the sealing strip substrate 602 is wrapped, a cast copper sealing strip is adopted, the upper end surface of the end surface contact strip 601 contacts the end surface of the movable guide vane 10, and two sides of the end surface contact strip 601 contact the first pressing plate 2 and the second pressing plate 8 to form good sealing. Because the main sealing surfaces are all on the end surface contact strip 601, and the end surface contact strip 601 moves repeatedly, the end surface contact strip 601 is easy to wear after long-time use, when the end surface contact strip 601 fails, the engagement screw 605 can be screwed down from the opposite side, and the end surface contact strip 601 is detached to be replaced with a new one, so that the whole end surface sealing strip device 6 does not need to be replaced.
In a preferred embodiment, the end face sealing strip device 6 is provided with an inner groove 607 on one side close to the bottom ring 1, and the middle supporting sealing strip 7 is arranged in the inner groove 607.
The middle supporting sealing strip 7 is higher than the side supporting sealing strip 5, and is a main supporting means, and the inner groove 607 limits the middle supporting sealing strip 7 to prevent the transverse movement.
The above-described structure is applicable not only to the bottom ring 1 but also to the top ring.
Example 2:
the combined end face sealing structure consists of a left pressing plate, an inner hexagonal stainless steel bolt, a nitrile rubber sealing strip, a cast copper sealing strip, a polyurethane sealing strip and a right pressing plate, and other parts comprise a bottom ring (or a top cover), a bolt hole, a movable guide vane shaft, a movable guide vane and a cavity. Wherein the bolt holes are arranged in the bottom ring (or the top cover), and the left pressing plate and the right pressing plate are fixedly arranged in the bottom ring (or the top cover) through inner hexagonal stainless steel bolts. The cast copper sealing strip is fixed by the left pressing plate and the right pressing plate, and simultaneously contacts and extrudes the nitrile rubber sealing strip and the polyurethane sealing strip to play a sealing effect.
The combined end face sealing structure adopts a mode of combining a metal sealing pressing block, a polyurethane sealing strip and a nitrile rubber sealing strip, is arranged at the contact part of a bottom ring and a top cover of a unit and a movable guide vane, and is in sealing contact extrusion with the combined type after the movable guide vane is closed, so that the sealing water flow is realized. The combined seal is formed by fixing a middle cast copper sealing strip by stainless steel pressing plates on two sides, wherein the cast copper sealing strip is pressed on the outer side of a polyurethane sealing strip, one side of the polyurethane sealing strip is a nitrile rubber sealing strip, and the other side of the polyurethane sealing strip is a cavity. When the movable guide vane is closed, the cast copper sealing strip is subjected to the acting force in the scraping direction of the guide vane, the cast copper sealing strip is inwards displaced to extrude the cavity under the influence of the acting force, the design of the cavity provides an inwards displaced space for the cast copper sealing strip, the extruded polyurethane sealing strip and the nitrile rubber sealing strip are extruded along with the extruded deep cast copper sealing strip, the guide vane is influenced by the elasticity of the sealing strip after being closed in place, the cast copper sealing strip outwards rebounds and is tightly contacted with the end face of the movable guide vane, and the effect of sealing water flow is achieved. When the movable guide vane is opened, the cast copper sealing strip can downwards displace when in friction due to the existence of the cavity, so that the scraping force is reduced, and when the movable guide vane is separated from the cast copper sealing strip, the cast copper sealing strip is rebounded under the influence of the elasticity of the sealing strip.
The cast copper sealing strip can be replaced by a hard sealing strip made of other materials, and the polyurethane sealing strip and the nitrile rubber sealing strip can be replaced by a soft sealing strip made of other materials.
The sealing failure problem caused by the factors such as long-term underwater soaking, scouring, scraping with guide vanes and the like of the sealing strip can be well solved by adopting a mode of combining the metal sealing pressing block, the polyurethane sealing strip and the nitrile rubber sealing strip.
The above embodiments are only preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the scope of the present utility model should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.
Claims (5)
1. A hydroelectric set movable guide vane end face combined type sealing structure is characterized in that: including installing first clamp plate (2) and second clamp plate (8) on base ring (1), constitute the draw-in groove structure in the middle of first clamp plate (2) and second clamp plate (8), but be equipped with the terminal surface sealing strip device (6) of indent in the draw-in groove structure, terminal surface sealing strip device (6) terminal surface protrusion is in terminal surface of draw-in groove structure up end in order to contact movable vane (10), terminal surface sealing strip device (6) eccentric in the line one side of the stator axle (9) of adjacent movable vane (10) is arranged, the middle part of one side that terminal surface sealing strip device (6) is close to base ring (1) is equipped with middle part support sealing strip (7), middle part support sealing strip (7) both sides are equipped with side support sealing strip (5) and cavity portion (11) respectively, side support sealing strip (5) are established in the one side of being close to the line of stator axle (9), side support sealing strip (5) and middle part support sealing strip (7) have elasticity, side support sealing strip (5) and middle part support sealing strip (7) are used for supporting terminal surface sealing strip device (6).
2. The hydroelectric generating set movable guide vane end face combined type sealing structure according to claim 1, characterized in that: the end face sealing strip device (6) is close to one side both ends of the bottom ring (1) and is also provided with a clamping supporting part (604), the clamping supporting part (604) is used for stopping the end face sealing strip device (6), a gap is arranged between the clamping supporting part (604) and the bottom ring (1), and the side supporting sealing strip (5) is arranged in the gap at one side close to the connecting line of the guide vane shaft (9).
3. The hydroelectric generating set movable guide vane end face combined type sealing structure according to claim 1, characterized in that: the end face sealing strip device (6) comprises an end face contact strip (601) and a sealing strip substrate (602), wherein the sealing strip substrate (602) is provided with a positioning protrusion (606), the end face contact strip (601) is provided with a positioning groove, the positioning protrusion (606) is clamped with the positioning groove, a connecting screw (605) is further arranged, and the end face contact strip (601) is connected with the sealing strip substrate (602) through the connecting screw (605).
4. The hydroelectric generating set movable guide vane end face combined type sealing structure according to claim 1, characterized in that: an inner groove (607) is arranged on one side of the end face sealing strip device (6) close to the bottom ring (1), and a middle supporting sealing strip (7) is arranged in the inner groove (607).
5. The hydroelectric generating set movable guide vane end face combined type sealing structure according to claim 1, characterized in that: the two ends of one side of the end face sealing strip device (6) far away from the bottom ring (1) are provided with chamfer parts (603).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321616279.7U CN220285900U (en) | 2023-06-25 | 2023-06-25 | End face combined sealing structure of movable guide vane of hydroelectric generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321616279.7U CN220285900U (en) | 2023-06-25 | 2023-06-25 | End face combined sealing structure of movable guide vane of hydroelectric generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220285900U true CN220285900U (en) | 2024-01-02 |
Family
ID=89340986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321616279.7U Active CN220285900U (en) | 2023-06-25 | 2023-06-25 | End face combined sealing structure of movable guide vane of hydroelectric generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220285900U (en) |
-
2023
- 2023-06-25 CN CN202321616279.7U patent/CN220285900U/en active Active
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