CN205423034U - Compound polyurethane movable guide vane facade sealing device is moulded to steel - Google Patents
Compound polyurethane movable guide vane facade sealing device is moulded to steel Download PDFInfo
- Publication number
- CN205423034U CN205423034U CN201620201835.8U CN201620201835U CN205423034U CN 205423034 U CN205423034 U CN 205423034U CN 201620201835 U CN201620201835 U CN 201620201835U CN 205423034 U CN205423034 U CN 205423034U
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- CN
- China
- Prior art keywords
- guide vane
- movable guide
- polyurethane
- sealing device
- seal plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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 provides a compound polyurethane movable guide vane facade sealing device is moulded to steel. Sealing device include movable guide vane rectangular channel, polyurethane closing plate, stainless steel hexagon socket head cap screw, the movable guide vane rectangular channel is offered on the big women's head -ornaments of movable guide vane body, and movable guide vane rectangular channel bottom surface is equipped with the screw hole, the polyurethane closing plate is protruding for having in the middle of the rectangular platy structure, and protruding both sides are provided with the bolt hole that corresponds with the screw hole respectively, stainless steel hexagon socket head cap screw fixes the polyurethane closing plate on the movable guide vane body. The polyurethane closing plate adopts the smooth transition of polyurethane composite resin mortar packing carrying on with movable guide vane body outer fringe. The utility model provides a sealing device's wear problem, make the stator leakproofness improve greatly again to because of the stator volume of leaking increases the unit shunt running phenomenon that has resulted in, the generating efficiency of unit has been improved greatly when having improved the orderly closedown.
Description
Technical field
This utility model belongs to Hydropower Plant movable guide vane facade technical field of sealing technology, especially a kind of steel plastic compount polyurethane movable guide vane facade sealing device.
Background technology
It is that metal rigidity seals that tradition certain large hydropower station Francis turbine movable guide vane facade domestic seals original shape formula.Running through for many years, under the long-term souring of high speed hyper-concentration flow, the rigidity facade sealing surface of stator gradually weares and teares, and the abrasion of sealing surface has been further exacerbated by the cavitation at sealing, forms vicious cycle, causes stator facade sealing wear serious cavitation erosion.On the one hand, abrasion causes stator water leakage to strengthen, and causes unit downtime to extend, adds the abrasion of arrestment mechanism；On the other hand, when stator leaks bigger, unit has shunt running phenomenon, the safety of the equipment such as serious threat unit thrust bearing, also directly affects the generating efficiency of unit.
After sealing abrasion, it is repaired by the general technique for overlaying that passes through, but manual polishing repaiies type difficulty after built-up welding, and heap solder joint also becomes the tender spots of metal cavitation, through one light maintenance week after date, overlaying surface is i.e. abraded totally, cavitation hurts the body mother metal of movable guide vane further, has had a strong impact on the operation service life of movable guide vane.
Manage investigation by existing literature retrieval and power station actual motion to find, also has a kind of nonmetal sealing means, it is applied in practice, this sealing strip shape mainly has solid and hollow two kinds of triangle, need to seal big head at stator facade and drive dovetail groove or dovetail groove carries out installing and fixing, it is preferable that this sealing means puts into initial stage sealing effectiveness, but after running a period of time, easily there is cavitation with dovetail groove or dovetail groove delivery position in sealing strip, little plus sealing strip volume, material is soft, easily coming off in fixing groove causes sealing strip to lose efficacy.
Existing disclosed documents and materials are the most on the books, publication number CN103982356A discloses a kind of crush controllable moving stator that seals and founds surface seal structure, this sealing structure is by movable guide vane lobe body head seal groove, movable guide vane vertical face sealing strips, wicket gate seal pressing plate, screw, movable guide vane lobe body afterbody, movable guide vane lobe body head is machined with seal groove, movable guide vane vertical face sealing strips loads in seal groove, using wicket gate seal pressing plate to push down, wicket gate seal pressing plate is fixed on conjunction on movable guide vane lobe body head by screw.
Utility model content
Problem to be solved in the utility model is to provide a kind of steel plastic compount polyurethane movable guide vane facade sealing device; described device be a kind of can effectively and movable guide vane is fixed and the sealing device of anti-cavitation; guarantee stator to shut down when having good sealing and startup-shutdown under full off state and there is good anti-cavitation ability; ensure unit safety operation, increase power benefit.
In order to achieve the above object, the technical solution of the utility model is achieved in that
A kind of steel plastic compount polyurethane movable guide vane facade sealing device, described sealing device is arranged on the big head of movable guide vane body；This sealing device includes movable guide vane rectangular channel, polyurethane seal plate, rustless steel hexagon socket head cap screw；Movable guide vane rectangular channel is located on the big head of movable guide vane body, and movable guide vane rectangular channel bottom surface is provided with screw hole；Polyurethane seal plate is to have projection, projection both sides to be respectively arranged with the bolt hole corresponding with screw hole in the middle of rectangular plate-like structure；Rustless steel hexagon socket head cap screw is fixing connects polyurethane seal plate and movable guide vane body.Polyurethane seal plate and movable guide vane body outer rim use polyurethane composite resin mortar to fill and smoothly transit.
Further, each machined surface of described movable guide vane rectangular channel must assure that and the depth of parallelism of movable guide vane body axial line.
Further, described polyurethane seal plate being provided with the embedded expanded metal lath of polyurethane seal plate, this expanded metal lath is tabular.
Further, thread locking glue is smeared at described rustless steel hexagon socket head cap screw and the screw hole place of being connected.
Further, packing ring epoxy resins gum base liquid between described movable guide vane rectangular channel and polyurethane seal plate, and its flush.
This utility model beneficial effect compared to existing technology:
This utility model solves the wear problem of sealing device, makes again wicket gate seal be greatly improved, thus the unit shunt running phenomenon caused because stator water leakage increases when improving orderly closedown, substantially increase the generating efficiency of unit.Specifically:
(1) it is effectively increased the sealing property under stator full off state, when improving orderly closedown, causes unit shunt running phenomenon because stator water leakage increases.
(2) polyurethane seal plate uses the polyurethane elastomeric materials being suitable to term underwater work, this elastomeric material has the higher resistance to water of elasticity, intensity and excellence, wearability, oil resistivity, endurance, tear-resistant and anti-vibration resistance, and its wearability is more than 10 times of ordinary carbon steel.
(3), between hexagon socket head cap screw and this sealing plate and the movable guide vane body outer rim of fixing polyurethane seal plate, all use polyurethane composite mortar to be filled with and the process that smoothly transits, efficiently solve after installation sealing plate problem of cavitation.
(4) sealing plate mounting means is simple, convenient disassembly, and in-site installation condition requires the harshest, has interchangeability, the most replaceable during unit light maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model device；
Fig. 2 is the planar structure schematic diagram of movable guide vane rectangular channel；
Fig. 3 is the sectional structure schematic diagram of polyurethane seal plate.
In figure: 1-movable guide vane body；2-movable guide vane rectangular channel；3-screw hole；The embedded expanded metal lath of 4-polyurethane seal plate；5-rustless steel hexagon socket head cap screw；6-polyurethane seal plate；7-polyurethane composite resin mortar；8-bolt hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail.
Such as Fig. 1 with as in figure 2 it is shown, a kind of steel plastic compount polyurethane movable guide vane facade sealing device, described sealing device is arranged on the big head of movable guide vane body 1；This sealing device includes movable guide vane rectangular channel 2, polyurethane seal plate 6, rustless steel hexagon socket head cap screw 5；
Movable guide vane rectangular channel 2 is opened on the big head of movable guide vane body 1, and movable guide vane rectangular channel 2 bottom surface is provided with screw hole 3, and each machined surface of described movable guide vane rectangular channel 2 must assure that and the depth of parallelism of movable guide vane body 1 axial line.
As it is shown on figure 3, polyurethane seal plate 6 has projection, projection both sides to be respectively arranged with the bolt hole 8 corresponding with screw hole 3 in the middle of rectangular plate-like structure；The described projection in the middle of polyurethane seal plate, in order to prevent projection from causing and stator contact position cavitation, is still polyurethane elastomer after sealing circular arc, can preferably solve to produce problem of cavitation after stator installs sealing strip additional；Described polyurethane seal plate 6 uses the polyurethane elastomeric materials being suitable to term underwater work, and this elastomeric material has the higher resistance to water of elasticity, intensity and excellence, wearability, oil resistivity, endurance, tear-resistant and anti-vibration resistance；
Being provided with the embedded expanded metal lath of polyurethane seal plate 4 on polyurethane seal plate 6, this expanded metal lath is tabular, embeds the embedded expanded metal lath of polyurethane seal plate 4 and forms steel plastic composite structure, increase structural integrity and intensity in the middle of polyurethane seal plate 6；
Thread locking glue is smeared at rustless steel hexagon socket head cap screw 5 and screw hole 3 place of being connected；
Packing ring epoxy resins gum base liquid between movable guide vane rectangular channel 2 and polyurethane seal plate 6, and its flush, polyurethane seal plate 6 uses the filling of polyurethane composite resin mortar 7 to smoothly transit with the outer rim of movable guide vane body 1；
This 1 body of polyurethane seal plate 6 and movable guide vane is sealed fixing by rustless steel hexagon socket head cap screw 5 bolt.
This utility model concrete application in engineering reality:
This utility model is applied to certain large hydropower station movable guide vane seal reconstruction domestic, through more than ten years lot of experiments, preferably go out to be very suitable for the polytetramethylene ether EU elastomeric material of water machine and waterwork as sealing strip base material, show that this material has the advantages such as compliance is good, resistance to water is strong, wear-resistant anti-cavitation performance strong, mechanical strength scope is wide, rebound performance is good by testing of materials.
In order to increase the rigidity of polyurethane seal plate 6 and intensity bolted with movable guide vane body 1, expanded metal lath 4 embedded with polyurethane seal plate forms steel plastic composite structure, and processing technology is: mould leveling heating → raw material heating → expanded metal lath brushing bonding agent, placement leveling → cast polyurethane elastomeric material → heat preservation solidification → product.
The former rigid seal mode of unit movable guide vane body 1 is denuded seriously, and during orderly closedown, stator leaks seriously, even can not cut off current normal shutdown, after using tradition built-up welding polishing mode to process, occurs again above-mentioned phenomenon in the short time.After using this steel plastic compount polyurethane movable guide vane body 1 facade sealing device, using effect is the best, has both solved abrasion problem of cavitation, makes again wicket gate seal excellent effect, leaks hardly during compressor emergency shutdown state., testing the polyurethane seal plate running more than ten years, its tensile strength, tear resistance, hardness decline less than 5%, and anti-erosion performance goes up not down meanwhile.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (5)
1. a steel plastic compount polyurethane movable guide vane facade sealing device, it is characterised in that: described sealing device is arranged on the big head of movable guide vane body (1)；This sealing device includes movable guide vane rectangular channel (2), polyurethane seal plate (6), rustless steel hexagon socket head cap screw (5)；Movable guide vane rectangular channel (2) is located on the big head of movable guide vane body (1), and movable guide vane rectangular channel (2) bottom surface is provided with screw hole (3)；Polyurethane seal plate (6) is to have projection, projection both sides to be respectively arranged with the bolt hole (8) corresponding with screw hole (3) in the middle of rectangular plate-like structure；Fixing polyurethane seal plate (6) and the movable guide vane body (1) of connecting of rustless steel hexagon socket head cap screw (5), polyurethane seal plate (6) and movable guide vane body (1) outer rim use polyurethane composite resin mortar (7) to fill.
A kind of steel plastic compount polyurethane movable guide vane facade sealing device the most according to claim 1, it is characterised in that: each machined surface of described movable guide vane rectangular channel (2) must assure that and the depth of parallelism of movable guide vane body (1) axial line.
A kind of steel plastic compount polyurethane movable guide vane facade sealing device the most according to claim 1, it is characterised in that: being provided with the embedded expanded metal lath of polyurethane seal plate (4) on described polyurethane seal plate (6), this expanded metal lath is tabular.
A kind of steel plastic compount polyurethane movable guide vane facade sealing device the most according to claim 1, it is characterised in that: thread locking glue is smeared at described rustless steel hexagon socket head cap screw (5) and screw hole (3) place of being connected.
A kind of steel plastic compount polyurethane movable guide vane facade sealing device the most according to claim 1, it is characterised in that: packing ring epoxy resins gum base liquid between described movable guide vane rectangular channel (2) and polyurethane seal plate (6), and its flush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620201835.8U CN205423034U (en) | 2016-03-16 | 2016-03-16 | Compound polyurethane movable guide vane facade sealing device is moulded to steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620201835.8U CN205423034U (en) | 2016-03-16 | 2016-03-16 | Compound polyurethane movable guide vane facade sealing device is moulded to steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205423034U true CN205423034U (en) | 2016-08-03 |
Family
ID=56547162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620201835.8U Expired - Fee Related CN205423034U (en) | 2016-03-16 | 2016-03-16 | Compound polyurethane movable guide vane facade sealing device is moulded to steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205423034U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497465A (en) * | 2020-11-13 | 2021-03-16 | 重庆唯美陶瓷有限公司 | Ceramic tile distribution grid and manufacturing method thereof |
-
2016
- 2016-03-16 CN CN201620201835.8U patent/CN205423034U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497465A (en) * | 2020-11-13 | 2021-03-16 | 重庆唯美陶瓷有限公司 | Ceramic tile distribution grid and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20180316 |