CN106438160A - Steel-plastic composite anti-wear plate for water guide sealing structure of water turbine - Google Patents
Steel-plastic composite anti-wear plate for water guide sealing structure of water turbine Download PDFInfo
- Publication number
- CN106438160A CN106438160A CN201611196478.1A CN201611196478A CN106438160A CN 106438160 A CN106438160 A CN 106438160A CN 201611196478 A CN201611196478 A CN 201611196478A CN 106438160 A CN106438160 A CN 106438160A
- Authority
- CN
- China
- Prior art keywords
- wear
- top cover
- slab element
- resistant
- base ring
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/006—Sealing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention relates to a steel-plastic composite anti-wear plate for a water guide sealing structure of a water turbine. The steel-plastic composite anti-wear plate for the water guide sealing structure of the water turbine comprises a water turbine bottom ring and a water turbine top cover, wherein a bottom ring anti-wear plate assembly is arranged on the upper end surface of the water turbine bottom ring and comprises a plurality of fan-shaped bottom ring anti-wear plate units with the same structures; the bottom ring anti-wear plate units are uniformly distributed along the upper end surface of the water turbine bottom ring; a top cover anti-wear plate assembly comprises a plurality of fan-shaped top cover anti-wear plate units with the same structures; each top cover anti-wear plate unit consists of a first top cover anti-wear plate unit and a second top cover anti-wear plate unit; and the first top cover anti-wear plate units and the second top cover anti-wear plate units are successively and alternately distributed uniformly along the lower end surface of the water turbine top cover.
Description
Technical field
The invention belongs to Hydropower Plant water distributor technical field of sealing technology, more particularly, to a kind of close for hydraulic turbine water guide
The steel plastic compount wearing plate, facing plate of seal structure.
Background technology
Turbine gate mechanism wetted surfaces, are subject to the souring of high-velocity flow in running, particularly work as water
When middle silt content is big, ablation destruction is extremely serious, is that the difficulty containing husky multiphase flow water quality, the middle high head hydroelectric power plant hydraulic turbine is led to
Disease, jeopardizes power plant safety economical operation for a long time.
In hydraulic turbine structure design, the base ring of water distributor and the wetted surfaces of top cover need using special overlay
Protection, this special overlay is wearing plate, facing plate.Traditional wearing plate, facing plate is using in mode connects for screw to base ring and top cover, when wearing plate, facing plate mill
After damage during major overhaul, by old wearing plate, facing plate dismounting, the wearing plate, facing plate more renewing.Because this kind of wear-resistant board size is big, weight is big,
The selection of material and processing technique aspect are all subject to certain restrictions.Typically use general steel plate manufacture, when in water silt content big or
When head is high, using corrosion resistant plate manufacture.But anti-wear performance is unsatisfactory, when particularly silt content is big, the longevity of this kind of wearing plate, facing plate
Life often controls the overhaul time of unit.The replacing of wearing plate, facing plate needs long-time shutdown, expends lot of materials and man hour of labour, causes
Huge economic losses (maintenance loss of outage：It is that as a example 200,000 kw units, daily generated energy loses as 4.8 × 10 by single-machine capacity5
Degree, rate for incorporation into the power network is pressed 0.3 yuan/degree and is calculated, daily 1,440,000 yuan of loss).
Find, bottom was once made using nylon in some power stations by existing document data-searching and the investigation of power station actual motion
Ring wearing plate, facing plate replaces abrasion resistance of metal plate although abrasion-resistance improves, but DeGrain；The power station also having is using super
High density polyethylene (HDPE) makes wearing plate, facing plate although the abrasion resistance of this wearing plate, facing plate is better than the wearing plate, facing plate of nylon material, but makes for a long time
With easily deformable, after soaking 2～3 years in water, because imbibition leads to deform, produce " wedge gap " expanding, thus go out
Existing gap " secondary channelling ", cavitation of clearance is clashed into silt high frequency high attack angle and is superimposed, and leads to hydraulic turbine seal ring cavitation
Seriously, threaten the safe operation of the hydraulic turbine.
Content of the invention
Goal of the invention：The present invention is directed to the problem that above-mentioned prior art exists and makes improvement, that is, the invention discloses a kind of
For the steel plastic compount wearing plate, facing plate of hydraulic turbine water guide sealing structure, it is good that it is able to ensure that stator has under shutting down full off state
Sealing, there is in startup-shutdown good anti-cavitation ability simultaneously, ensure unit safety operation, increase power benefit.
Technical scheme：A kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure, including hydraulic turbine base ring and
Water-turbine top cover,
The upper surface of described hydraulic turbine base ring is provided with the wear-resistant board component of base ring,
It is in the fan-shaped wear-resistant Slab element of base ring that the wear-resistant board component of described base ring includes multiple structure identicals, and multiple base rings resist
Nog plate unit is uniformly laid along the upper surface of hydraulic turbine base ring,
The wear-resistant Slab element of described base ring embeds the first stainless steel insert by polyurethane elastomer and forms, described base ring wearing plate, facing plate
It is provided with a stator lower surface seal convexity in the middle part of the outer surface radial direction of unit；
Multiple first shoulder holes are uniformly laid with the wear-resistant Slab element of described base ring, the wear-resistant Slab element of described base ring with described
Hydraulic turbine base ring is fixedly connected with bolt by described first shoulder hole,
The lower surface of described water-turbine top cover is installed with the wear-resistant board component of top cover,
It is in fan-shaped top cover wear-resistant Slab element composition that the wear-resistant board component of described top cover includes multiple structure identicals, described top
Cover wear-resistant Slab element to be made up of the wear-resistant Slab element of the first top cover and the wear-resistant Slab element of the second top cover, described first top cover wearing plate, facing plate list
The wear-resistant Slab element of first, described second top cover is alternately uniformly laid along the lower surface of water-turbine top cover successively；
The wear-resistant Slab element of described first top cover embeds the second stainless steel insert by polyurethane elastomer and forms, this first top cover
It is provided with a stator upper surface seal convexity in the middle part of the outer surface radial direction of wear-resistant Slab element；
The wear-resistant Slab element of described second top cover embeds the 3rd stainless steel insert by polyurethane elastomer and forms, this second top cover
It is provided with a stator upper surface seal convexity in the middle part of the outer surface radial direction of wear-resistant Slab element；
The wear-resistant Slab element of described first top cover is uniformly laid with multiple second shoulder holes, the wear-resistant Slab element of described first top cover
It is fixedly connected with described water-turbine top cover with bolt by the second shoulder hole,
Multiple second shoulder holes are uniformly laid on the wear-resistant Slab element of described second top cover, the wear-resistant Slab element of described second top cover
It is fixedly connected with described water-turbine top cover with bolt by the second shoulder hole.
Further, described bolt is stainless steel bolt.
Further, the top of the stainless steel bolt being laid in first shoulder hole is coated with Polyurethane Perfusion glue.
Further, the top of the stainless steel bolt being laid in the second shoulder hole is provided with composite resin mortar.
Further, described first shoulder in the hole side, described second shoulder in the hole side are equipped with thread locking glue.
Further, the middle part of the wear-resistant Slab element of described base ring is provided with the first concentric holes, described first concentric holes and activity
The installing hole of stator is concentric and diameter is identical.
Further, described first stainless steel insert is made up of first shoulder hole and the first stainless steel insert mesh.
Further, it is provided with the second concentric holes, described second concentric holes and work in the middle part of the wear-resistant Slab element of described first top cover
Dynamic stator installing hole is concentric and diameter is identical.
Further, described second stainless steel insert is made up of the second shoulder hole and the second stainless steel insert mesh.
Further, described 3rd stainless steel insert 21 is made up of the second shoulder hole and the 3rd stainless steel insert mesh.
Beneficial effect：A kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure disclosed by the invention have with
Lower beneficial effect：
(1) stator lower surface seal convexity and stator upper surface seal convexity effectively increase close under stator full off state
Sealing property, is used cooperatively with wicket gate seal plate, improves and leads to unit shunt running phenomenon because water leakage increases during orderly closedown；
(2) adopt polyurethane elastomer, this elastomer has higher elasticity, intensity and excellent resistance to water, wear-resisting
Property, oil resistivity, endurance, tear-resistant and anti-vibration resistance, its wearability is more than 10 times of ordinary carbon steel, is the poly- second of VHD
More than 3 times of alkene, soak 6 years various intensity indexs and decline less than 10% in water；
(3), after adopting steel plastic compount technology machine-shaping, globality is strong, can be machined out, with water when locally need to process
Turbine base ring and water-turbine top cover are fixed by stainless steel bolt, and surface is obtained composite resin mortar with high anti scuffing polyurethane adhesive and entered
Row sealing it is ensured that with wear-resistant plate surface no pit and obvious gap, smooth flush, do not produce in operation abrasion cavitation source.
(4) mounting means is simple, convenient disassembly, and the requirement of in-site installation condition is not harsh, has interchangeability, greatlys save dimension
Repair the time.
Brief description
Fig. 1 is the scheme of installation of hydraulic turbine base ring and the wear-resistant board component of base ring；
Fig. 2 is the top view of the wear-resistant Slab element of the first base ring；
Fig. 3 is the sectional view in the A-A face of Fig. 2；
Fig. 4 is the top view of the first stainless steel insert；
Fig. 5 is the scheme of installation of water-turbine top cover and the wear-resistant board component of top cover；
Fig. 6 is the top view of the wear-resistant Slab element of the first top cover；
Fig. 7 is the top view of the wear-resistant Slab element of the second top cover；
Fig. 8 is the sectional view in the B-B face of Fig. 6；
Fig. 9 is the sectional view in the C-C face of Fig. 7；
Figure 10 is the top view of the second stainless steel insert；
Figure 11 is the top view of the 3rd stainless steel insert；
Wherein：
The wear-resistant board component of 1- hydraulic turbine base ring 2- base ring
3- base ring wear-resistant Slab element 4- first shoulder hole
5- bolt 6- stator lower surface seal convexity
7- the first concentric holes 8- polyurethane elastomer
9- the first stainless steel insert 10- thread locking glue
11- Polyurethane Perfusion glue 12- the first stainless steel insert mesh
The wear-resistant board component of 13- water-turbine top cover 14- top cover
The wear-resistant Slab element of 15- first top cover wear-resistant Slab element 16- the second top cover
17- stator upper surface seal convexity 18- the second concentric holes
19- composite resin mortar 20- the second stainless steel insert
21- the 3rd stainless steel insert
22- the second stainless steel insert mesh
23- the 3rd stainless steel insert mesh
24- the second shoulder hole
Specific embodiment：
Below the specific embodiment of the present invention is described in detail.
As shown in Fig. 1～11, a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure, including hydraulic turbine bottom
Ring 1 and water-turbine top cover 13,
The upper surface of hydraulic turbine base ring 1 is provided with the wear-resistant board component of base ring 2,
It is in the fan-shaped wear-resistant Slab element of base ring 3 that the wear-resistant board component of base ring 2 includes multiple structure identicals, and multiple base rings are wear-resistant
Slab element 3 is uniformly laid along the upper surface of hydraulic turbine base ring 1,
The wear-resistant Slab element of base ring 3 embeds the first stainless steel insert 9 by polyurethane elastomer 8 and forms, the wear-resistant Slab element of base ring 3
Outer surface radially in the middle part of be provided with a stator lower surface seal convexity 6；
Multiple first shoulder holes 4, the wear-resistant Slab element of base ring 3 and hydraulic turbine bottom are uniformly laid with the wear-resistant Slab element of base ring 3
Ring 1 is fixedly connected with bolt 5 by first shoulder hole 4,
The lower surface of water-turbine top cover 13 is installed with the wear-resistant board component of top cover 14,
It is in fan-shaped top cover wear-resistant Slab element composition that the wear-resistant board component of top cover 14 includes multiple structure identicals, and top cover is wear-resistant
Slab element is made up of the first top cover wear-resistant Slab element 15 and the wear-resistant Slab element of the second top cover 16, the wear-resistant Slab element of the first top cover 15,
The wear-resistant Slab element of second top cover 16 is alternately uniformly laid along the lower surface of water-turbine top cover 13 successively；
The wear-resistant Slab element of first top cover 15 embeds the second stainless steel insert 20 by polyurethane elastomer 8 and forms, the first top cover
It is provided with a stator upper surface seal convexity 17 in the middle part of the outer surface radial direction of wear-resistant Slab element 15；
The wear-resistant Slab element of second top cover 16 embeds the 3rd stainless steel insert 21 by polyurethane elastomer 8 and forms, this second top
Cover and be provided with a stator upper surface seal convexity 17 in the middle part of the outer surface radial direction of wear-resistant Slab element 16；
The wear-resistant Slab element of first top cover 15 is uniformly laid with multiple second shoulder holes 24, and the wear-resistant Slab element of the first top cover 15 leads to
Cross the second shoulder hole 24 to be fixedly connected with water-turbine top cover 13 with bolt 5,
Multiple second shoulder holes 24 are uniformly laid on the wear-resistant Slab element of the second top cover 16, the wear-resistant Slab element of the second top cover 16 leads to
Cross the second shoulder hole 24 to be fixedly connected with water-turbine top cover 13 with bolt 5.
Further, bolt 5 is stainless steel bolt.
Further, the top of the stainless steel bolt being laid in first shoulder hole 4 is coated with Polyurethane Perfusion glue 11.
Further, the top of the stainless steel bolt being laid in the second shoulder hole 24 is provided with composite resin mortar 19.
Further, inside first shoulder hole 4, inside the second shoulder hole 24, it is provided with thread locking glue 10.
Further, the middle part of the wear-resistant Slab element of base ring 3 is provided with the first concentric holes 7, the first concentric holes 7 and movable guide vane
Installing hole is concentric and diameter is identical.
Further, the first stainless steel insert 9 is made up of first shoulder hole 4 and the first stainless steel insert mesh 12.
Further, it is provided with the second concentric holes 18, the second concentric holes 18 and activity in the middle part of the wear-resistant Slab element of the first top cover 15
Stator installing hole is concentric and diameter is identical.
Further, the second stainless steel insert 20 is made up of the second shoulder hole 24 and the second stainless steel insert mesh 22.
Further, the 3rd stainless steel insert 21 is made up of the second shoulder hole 24 and the 3rd stainless steel insert mesh 23.
During use, stator passes through stator lower surface seal convexity 6, that stator upper surface seal convexity 17 is arranged in base ring is wear-resistant
Between board component 2 and the wear-resistant board component of top cover 14, can effectively suppress seepy question during stator off-mode.
Above embodiments of the present invention are elaborated.But the present invention is not limited to above-mentioned embodiment,
In the ken that art those of ordinary skill possesses, can also do on the premise of without departing from present inventive concept
Go out various change.
Claims (10)
1. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure it is characterised in that include hydraulic turbine base ring and
Water-turbine top cover,
The upper surface of described hydraulic turbine base ring is provided with the wear-resistant board component of base ring,
It is in the fan-shaped wear-resistant Slab element of base ring that the wear-resistant board component of described base ring includes multiple structure identicals, multiple base ring wearing plate, facing plates
Unit is uniformly laid along the upper surface of hydraulic turbine base ring,
The wear-resistant Slab element of described base ring embeds the first stainless steel insert by polyurethane elastomer and forms, the wear-resistant Slab element of described base ring
Outer surface radially in the middle part of be provided with a stator lower surface seal convexity；
Multiple first shoulder holes are uniformly laid with the wear-resistant Slab element of described base ring, the wear-resistant Slab element of described base ring and described water wheels
Machine base ring is fixedly connected with bolt by described first shoulder hole,
The lower surface of described water-turbine top cover is installed with the wear-resistant board component of top cover,
It is in fan-shaped top cover wear-resistant Slab element composition that the wear-resistant board component of described top cover includes multiple structure identicals, and described top cover resists
Nog plate unit is made up of the wear-resistant Slab element of the first top cover and the wear-resistant Slab element of the second top cover, the wear-resistant Slab element of described first top cover,
The wear-resistant Slab element of described second top cover is alternately uniformly laid along the lower surface of water-turbine top cover successively；
The wear-resistant Slab element of described first top cover embeds the second stainless steel insert by polyurethane elastomer and forms, and this first top cover is wear-resistant
It is provided with a stator upper surface seal convexity in the middle part of the outer surface radial direction of Slab element；
The wear-resistant Slab element of described second top cover embeds the 3rd stainless steel insert by polyurethane elastomer and forms, and this second top cover is wear-resistant
It is provided with a stator upper surface seal convexity in the middle part of the outer surface radial direction of Slab element；
The wear-resistant Slab element of described first top cover is uniformly laid with multiple second shoulder holes, and the wear-resistant Slab element of described first top cover passes through
Second shoulder hole is fixedly connected with described water-turbine top cover with bolt,
Multiple second shoulder holes are uniformly laid on the wear-resistant Slab element of described second top cover, the wear-resistant Slab element of described second top cover passes through
Second shoulder hole is fixedly connected with described water-turbine top cover with bolt.
2. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 1, its feature exists
In described bolt is stainless steel bolt.
3. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 2, its feature exists
In the top of the stainless steel bolt being laid in first shoulder hole is coated with Polyurethane Perfusion glue.
4. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 2, its feature exists
In the top of the stainless steel bolt being laid in the second shoulder hole is provided with composite resin mortar.
5. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 1, its feature exists
In described first shoulder in the hole side, described second shoulder in the hole side are equipped with thread locking glue.
6. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 1, its feature exists
Be provided with the first concentric holes in the middle part of, the wear-resistant Slab element of described base ring, the installing hole of described first concentric holes and movable guide vane with
The heart and diameter is identical.
7. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 1, its feature exists
In described first stainless steel insert is made up of first shoulder hole and the first stainless steel insert mesh.
8. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 1, its feature exists
In, be provided with the second concentric holes in the middle part of the wear-resistant Slab element of described first top cover, described second concentric holes and movable guide vane installing hole with
The heart and diameter is identical.
9. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 1, its feature exists
In described second stainless steel insert is made up of the second shoulder hole and the second stainless steel insert mesh.
10. a kind of steel plastic compount wearing plate, facing plate for hydraulic turbine water guide sealing structure according to claim 1, its feature exists
In described 3rd stainless steel insert 21 is made up of the second shoulder hole and the 3rd stainless steel insert mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196478.1A CN106438160A (en) | 2016-12-22 | 2016-12-22 | Steel-plastic composite anti-wear plate for water guide sealing structure of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196478.1A CN106438160A (en) | 2016-12-22 | 2016-12-22 | Steel-plastic composite anti-wear plate for water guide sealing structure of water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106438160A true CN106438160A (en) | 2017-02-22 |
Family
ID=58215889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611196478.1A Pending CN106438160A (en) | 2016-12-22 | 2016-12-22 | Steel-plastic composite anti-wear plate for water guide sealing structure of water turbine |
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| CN (1) | CN106438160A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291293Y (en) * | 1996-12-30 | 1998-09-16 | 宜兴市张泽化工设备厂 | Composite wear board |
| JP2000356178A (en) * | 1999-06-14 | 2000-12-26 | Hitachi Ltd | Seal device for vane |
| CN2550524Y (en) * | 2002-01-21 | 2003-05-14 | 赵永宪 | Water guide blade of self pressure leakage stop water turbine |
| CN2582868Y (en) * | 2002-12-02 | 2003-10-29 | 姚传贤 | Abrasion resistant plastic and steel plate composite structure wear resistant plate |
| CN201043509Y (en) * | 2007-05-23 | 2008-04-02 | 姚传贤 | Hydraulic turbine water distributor anti-abrasion plate with interchangeable bottom ring and top cover |
| CN206290358U (en) * | 2016-12-22 | 2017-06-30 | 黄河水利委员会黄河水利科学研究院 | For the steel plastic compount wearing plate, facing plate of hydraulic turbine water guide sealing structure |
-
2016
- 2016-12-22 CN CN201611196478.1A patent/CN106438160A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291293Y (en) * | 1996-12-30 | 1998-09-16 | 宜兴市张泽化工设备厂 | Composite wear board |
| JP2000356178A (en) * | 1999-06-14 | 2000-12-26 | Hitachi Ltd | Seal device for vane |
| CN2550524Y (en) * | 2002-01-21 | 2003-05-14 | 赵永宪 | Water guide blade of self pressure leakage stop water turbine |
| CN2582868Y (en) * | 2002-12-02 | 2003-10-29 | 姚传贤 | Abrasion resistant plastic and steel plate composite structure wear resistant plate |
| CN201043509Y (en) * | 2007-05-23 | 2008-04-02 | 姚传贤 | Hydraulic turbine water distributor anti-abrasion plate with interchangeable bottom ring and top cover |
| CN206290358U (en) * | 2016-12-22 | 2017-06-30 | 黄河水利委员会黄河水利科学研究院 | For the steel plastic compount wearing plate, facing plate of hydraulic turbine water guide sealing structure |
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