CN1576574A - Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature - Google Patents
Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature Download PDFInfo
- Publication number
- CN1576574A CN1576574A CNA031418570A CN03141857A CN1576574A CN 1576574 A CN1576574 A CN 1576574A CN A031418570 A CNA031418570 A CN A031418570A CN 03141857 A CN03141857 A CN 03141857A CN 1576574 A CN1576574 A CN 1576574A
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- CN
- China
- Prior art keywords
- abrasion
- epoxy glue
- polyurethane adhesive
- normal temperature
- construction
- 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.)
- Granted
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- 238000005299 abrasion Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000004814 polyurethane Substances 0.000 claims abstract description 47
- 229920002635 polyurethane Polymers 0.000 claims abstract description 47
- 239000002131 composite material Substances 0.000 claims abstract description 39
- 229920006335 epoxy glue Polymers 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000010276 construction Methods 0.000 claims abstract description 28
- 239000010935 stainless steel Substances 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000010962 carbon steel Substances 0.000 claims abstract description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 239000010949 copper Substances 0.000 claims abstract description 3
- 239000000853 adhesive Substances 0.000 claims description 34
- 230000001070 adhesive effect Effects 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 230000007797 corrosion Effects 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- -1 slush Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims 1
- 239000003292 glue Substances 0.000 abstract description 12
- 239000004568 cement Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 28
- 239000011248 coating agent Substances 0.000 description 27
- 239000004593 Epoxy Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011527 polyurethane coating Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002023 wood 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
Abstract
The normal temperature hydraulic turbine abrasion-resisting construction process adopts epoxy glue and polyurethane glue, and features that the epoxy glue and the polyurethane glue are first constituted into abrasion-resisting composite material with interpenetrating network structure, and then high temperature cured into one kind of high performance abrasion-resisting composite material 'prefabricated part', which is connected by means of adhering or spot welding at normal temperature to the cavitation or abrasion area of hydraulic turbine. The present invention may be used in various hydraulic turbine parts and is also suitable for the material of carbon steel, stainless steel, copper, aluminum, cement, etc. to meet various abrasion-resisting requirement.
Description
One, technical field:
The present invention relates to water turbine anti-abrasion method, but more specifically be meant the water turbine anti-abrasion method of construction under a kind of normal temperature, can be applicable to fields such as big-and-middle-sized turbine blade, high-lift pump flow passage part, ship propeller, the huge sluice gate of large-size chemical mixer paddle and large-scale water conservancy station, have protective actions such as cavitation prevention, anti-abrasion, corrosion protection.
Two, background technique:
The anti-abrasion of water turbine is the key subjects that domestic and international water conservancy circle is paid close attention to for a long time always.For this reason, relevant R﹠D institution with material circle of water conservancy circle and large enterprise have explored more than 40 year history nearly both at home and abroad, attempt to solve this difficult problem.
Both at home and abroad once tested multiple metal and nonmetallic material as the water turbine abrasion-resistant material about R﹠D institution, university and large enterprise.Wherein metallic material is as alloy powder spraying, metal-cermic spraying, the spraying of Tungsten carbite superelevation velocity of sound etc.The major defect of metallic coating is: spraying equipment is huge, site operation is inconvenient.Especially metal spraying needs high temperature condition, and turbine blade is produced distortion.In addition, the metal spraying cost is too high, 10,000 yuan/m of the domestic construction valency of Tungsten carbite spraying technology
2(50,000 yuan/m of valency abroad constructs
2), so be difficult to apply at home.Proof nonmetal abrasion-resistant material has: epoxy glue, Nitrile Rubber, fourth hydroxyl glue, butyronitrile hydroxyl glue, polyurethane adhesive, epoxy---polyurethane composite coating etc.These materials are as the anti-abrasion coating, and construction at normal temperatures all can't not used because of reaching requirement in turbine blade cavitation corrosion district with abrasion district anti-erosion performance.Epoxy was once studied by domestic relevant R﹠D institution---polyurethane composite coating on the small hydropower station water turbine as the anti-abrasion coating, but its construction temperature needs 120 ℃ of high temperature, this is to the huge blade of large medium-size station water turbine, and this construction at high temperature condition is difficult to carry out.In recent ten years, many R﹠D institution and enterprises both at home and abroad, also tested normal-temperature solidification polyurethane and epoxy---the polyurethane composite coating material is as big-and-middle-sized turbine blade abrasion-resistant material, as: polyurethane coating, France " the anti-and of a specified duration " polyurethane coating of the EG of U.S. S-80 polyurethane coating, Switzerland Mai Kataike coating, Britain E, WOOD company and FG coating, German excellent Yi Te company.But these anti-abrasion nonmetallic material, construction at normal temperatures finally all fails.
Employing epoxy glue and polyurethane adhesive composite material were once tested as big-and-middle-sized turbine blade cavitation corrosion district or abrasion district anti-abrasion protective coating by existing many R﹠D institutions and large enterprise both at home and abroad.But these composite coatings, at normal temperatures, adhesion strength rests on≤the 20Mpa level for a long time always between the interface, does not require all to fail because of performance reaches.And the construction at high temperature condition can't be accepted again big-and-middle-sized water turbine.
Three, summary of the invention:
The key problem in technology that the present invention need solve is at big-and-middle-sized turbine blade cavitation corrosion district or abrasion district, provides a kind of and can satisfy the anti-erosion performance requirement, can construct at normal temperatures again and also can guarantee the technological scheme of construction quality.
In order to achieve the above object, the present invention at first adopts the composite technology that inierpeneirating network structure is arranged that epoxy glue and polyurethane adhesive constitute; Next is to be solidified into a kind of high-performance composite materials " prefabricated component " earlier under high temperature (70～120 ℃) by epoxy glue and polyurethane adhesive, under normal temperature condition, by adhesive and spot welding reinforcement process, is connected in turbine blade cavitation corrosion district or abrasion district then.
The inierpeneirating network structure composite technology that described epoxy glue and polyurethane adhesive constitute comprises that epoxy glue provides anti-erosion performance for bottom glue strong bond stainless steel substrate, polyurethane adhesive for surface layer glue.Epoxy glue bottom wherein, it is by add composite catalyst in KD-EP-1 epoxy glue A component, it plays catalysis to opening epoxy bond generation hydroxyl in the epoxy resin, thereby impels hydroxyl (OH) and in the polyurethane (to form strong chemical bond NCO), simultaneously (NH in the epoxy glue
2) with polyurethane in (NCO) reaction, the firm inierpeneirating network structure of formation between epoxy primer and the polyurethane face glue interface has improved the bonding strength between epoxy glue and the polyurethane adhesive interface significantly like this.
Described polyurethane adhesive surface material, it is made up of two components of first, second, adopts the KD-PU-1 polyurethane adhesive." KD-PU-1 " is under 15～25 ℃ of normal temperature, solidify and had high comprehensive mechanical property in 8～10 days, wherein tensile strength reaches 32～36Mpa, and elongation at break reaches 450～500%, tearing toughness reaches 100～135KN/M, and hardness (Shao Shi) reaches 85～95.The comprehensive mechanical property that these are good, epoxy---the polyurethane composite coating polyurethane surface material before having reached, the mechanical property that under the hot setting condition, just can obtain, thus good anti-erosion performance is provided.
Above-mentioned epoxy glue---polyurethane adhesive inierpeneirating network structure composite material, be named meaning: " KD-2003-1 ", in 15～60 ℃ of scopes of solidifying temperature (construction temperature), its tensile strength has met and exceeded 30Mpa, and former epoxy glue and polyurethane composite coating, under this condition of cure, its tensile strength is generally below 20Mpa.
The current blade of flowing through in the hydraulic turbine operation process, owing to many-sided factors such as blade profile produce " cavitation phenomenon ", cavity runs to the zone of high pressure by low pressure area and crumbles and fall at once, produces in the moment of crumbling and fall and acts on blade surface up to hundreds of even thousands of atmospheric microjets; A qualified abrasion-resistant material requires the composite coating surface material to have high anti-abrasion damage capability, promptly require surface material to have high comprehensive mechanical property, must have high absorbing performance comprising surface material, with guarantee surface material in the cavitation corrosion district or abrasion district be subjected to high frequency with the impact of high pressure microjet and be not destroyed, require surface material to have high elongation percentage thus.Secondly,, except that silt, have many tip and hard object spare impact material surfaces in addition, therefore require surface material must have high tear strength because the working condition of hydraulic turbine operation is generally all very abominable.In addition, surface material also must have higher draw tensile strength and hardness, makes it to guarantee that material has higher wear resistance.Epoxy glue in the past---surface material will reach these higher mechanical properties in the polyurethane adhesive composite coating, must at high temperature solidify (promptly to the water turbine construction at high temperature), could satisfy this requirement.And normal temperature solidifies down, and comprehensive mechanical property is difficult to reach this requirement.This be before epoxy---one of major reason of polyurethane composite coating normal temperature construction failure.
Described high-performance composite materials " prefabricated component " are a kind of brand-new anti-abrasion methods, it be by epoxy glue and polyurethane adhesive brushing on the Stainless Sheet Steel of definite shape, and under high temperature (70～120 ℃) condition, solidify to form a composite material prefabricated component.Its construction technique is as follows:
Size and dimension according to turbine blade, at normal temperatures epoxy glue and polyurethane adhesive are brushed respectively be solidificated in a corrosion resistant plate (＜0.5mm) on, wherein epoxy glue is a base material, polyurethane adhesive is a surface material, solidified 3～5 days down at 70～120 ℃, make epoxy glue and polyurethane adhesive composite material " prefabricated component ", this " prefabricated component " has high comprehensive mechanical property.When constructing at the scene, at normal temperatures epoxy adhesive is applied on the blade in advance, then that " prefabricated component " is bonding on it, and at the edge " prefabricated component " point is welded on the turbine blade, solidify at normal temperatures about 10 days again.
It is bonding and add the new process advantage that spot welding reinforces and be that this " prefabricated component " sticks with glue agent: this kind composite coating, hot setting has high mechanical property very much, simultaneously, combination force has obtained reinforcement greatly between composite coating material and the blade, therefore, the reliability of this composite coating material also is improved greatly, and this also is very beneficial for improving the anti-erosion performance of coating.The inventive method can be carried out under normal temperature condition fully, and this is very favourable to site operations such as big-and-middle-sized blade, high-lift pumps.In addition, the inventive method also has an outstanding advantage, not influenced by ambient humidity, can construct under high humidity environment.This has just overcome former epoxy---and the polyurethane composite coating performance is subject to ambient humidity influence, decreased performance important technique measure under high humility.Be called " KD-2003-2 " " prefabricated component " composite material in the present invention, its tensile strength reaches 〉=35Mpa through preliminary test, and the polyurethane surface material also has good comprehensive mechanical property, and composite coating material has good water resistance simultaneously.
Four, embodiment:
Embodiment 1:
Epoxy glue and polyurethane adhesive inierpeneirating network structure material " KD-2003-1 " are simulated the waterpower abrasion test.
Test material preparation method: at normal temperatures the KD-EP-1 epoxy glue is cast in test block (stainless steel) surface (the test specimen surface is through sand blast), after treating the epoxy glue surface drying, pour into a mould the KD-PU-1 polyurethane adhesive in the above, this composite material was solidified 12 hours down at 50 ℃, placed 3 days under the room temperature, test result is as follows: at two kinds of flow velocitys of simulated flow flow velocity 35.87m/Sh 48.34m/s and sand content 15～16Kg/m again
3Under the working condition, " KD-2003-1 " anti-abrasion accumulative total test period met and exceeded 30 hours.During off-test, cladding material still intactly is adhered to test specimen surface, no obscission.Prove through this anti-abrasion simulation test: " KD-2003-1 " has good anti-erosion performance, and under identical operating mode, its coefficient that resistance to wears is stainless 3～6 times of Cr18Ni9Ti.And traditional epoxy glue and polyurethane adhesive composite coating material prepare test specimen by above method, make water machine anti-abrasion simulation test under identical working condition, generally move the Cumulative time less than 20 hours, and composite coating is destroyed or comes off.
Embodiment 2:
" KD-2003-1 " carries out anti-cavitation test on the small hydraulic turbine blade.
Construction process is as follows: under the normal temperature KD-EP-1 epoxy primer is applied to and is coated with KD-PU-1 polyurethane face glue (being coated with midfeather 30 ' altogether 6～8 times) to coating thickness behind blade surface through sandblast → the treat epoxy glue surface drying at normal temperatures and is about 2mm → with the blade that coats and solidifies under the 12 hours → room temperature down at 50 ℃ and placed 10 days.Through preliminary test, the hydraulic turbine operation time has reached more than 1000 hours, has obtained comparatively desired result.And traditional epoxy glue and polyurethane adhesive composite coating, behind this same terms hundreds of working time hour, coating is destroyed or comes off.
Embodiment 3:
" KD-2003-1 " composite coating proportioning and construction process: KD-EP-1 are primer.Be made up of two components of A, B, its proportioning is A: B=4: 1.5.Before the construction A, B two components are mixed in proportion brushing (or blade coating) on the steel base of sand blast, treat that epoxy primer surface drying (being that the top layer is tack-free) promptly is coated with KD-PU-1 face glue, this glue also is made up of two components of first, second, and its proportioning is a first: second=100: 14.Before use two components of first, second are mixed in proportion, (working life about 20 ') can be coated onto after mixing on the epoxy primer of surface drying, after being coated with first layer glue and treating surperficial surface drying, be coated with the second layer again, the centre is separated by 30 ', generally is coated with 6～8 times, and coating thickness can reach 2mm.
The present invention is equally applicable to following material: carbon steel, stainless steel, copper, aluminium, slush, concrete, plastic and glass steel etc., have construction under the normal temperature, and can satisfy various anti-erosion performance requirements.
Claims (8)
1. but the normal temperature water turbine anti-abrasion method of construction down adopts epoxy glue and polyurethane adhesive, it is characterized in that: the anti-abrasion composite material that inierpeneirating network structure is arranged that is made of epoxy glue and polyurethane adhesive at first; Next is to be solidified into a kind of high-performance anti-abrasion composite material " prefabricated component " earlier under high temperature (70～120 ℃) by epoxy glue and polyurethane adhesive, then at normal temperatures, bonding and the spot welding reinforcement process by adhesive is connected in turbine blade cavitation corrosion district or abrasion district.
2. but a kind of normal temperature according to claim 1 is the water turbine anti-abrasion method of construction down, it is characterized in that: described epoxy glue and polyurethane adhesive constitute the inierpeneirating network structure composite material, wherein epoxy glue be bottom (＜0.5mm), polyurethane adhesive be surface layer (＜3mm), by in epoxy glue, adding composite catalyst, make between the interface of epoxy glue and polyurethane adhesive, form the IPN web frame at normal temperatures, improve bonding force.
3. but a kind of normal temperature according to claim 1 and 2 is the water turbine anti-abrasion method of construction down, and it is characterized in that: described epoxy glue and polyurethane adhesive constitute the composite material of inierpeneirating network structure, and its construction temperature is 15～60 ℃, humidity≤70%.
4. but a kind of normal temperature according to claim 1 is the water turbine anti-abrasion method of construction down, it is characterized in that: described composite material prefabricated component, construction process is: by the size and dimension requirement in turbine blade cavitation corrosion district, at normal temperatures epoxy glue and polyurethane adhesive are brushed respectively be solidificated in a corrosion resistant plate (＜0.5mm) on, wherein epoxy glue be base material (＜0.5mm), polyurethane adhesive be surface material (＜3mm), solidified 3～5 days down at 70～120 ℃, make composite material " prefabricated component ".
5. but a kind of normal temperature according to claim 1 is the water turbine anti-abrasion method of construction down, it is characterized in that: the bonding and spot welding reinforcement process of described adhesive, be abrasion district or the position, cavitation corrosion district that prefabricated component is connected in blade, other positions of blade adopt in-situ spraying technology that polyurethane adhesive is sprayed at blade surface through the epoxy glue precoating.
6. but a kind of normal temperature according to claim 1 is the water turbine anti-abrasion method of construction down, it is characterized in that: described epoxy glue adopts KD-EP-1 epoxy glue primer, and it is made up of two components of A, B, and wherein the A component adds composite catalyst.
7. but a kind of normal temperature according to claim 1 is the water turbine anti-abrasion method of construction down, it is characterized in that: it is surface material that described polyurethane adhesive adopts the KD-PU-1 polyurethane adhesive, and it is made up of two components of first, second.
8. but a kind of normal temperature according to claim 1 is the water turbine anti-abrasion method of construction down, it is characterized in that being equally applicable to following material: carbon steel, stainless steel, copper, aluminium, slush, concrete, plastic and glass steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031418570A CN100443716C (en) | 2003-07-28 | 2003-07-28 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031418570A CN100443716C (en) | 2003-07-28 | 2003-07-28 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1576574A true CN1576574A (en) | 2005-02-09 |
| CN100443716C CN100443716C (en) | 2008-12-17 |
Family
ID=34579284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031418570A Expired - Lifetime CN100443716C (en) | 2003-07-28 | 2003-07-28 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100443716C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251904A (en) * | 2011-06-13 | 2011-11-23 | 鲁毅 | Cavitation-resistant and energy-saving modification method of water turbine |
| CN103994013A (en) * | 2014-04-24 | 2014-08-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Abrasion-proof method of water turbine fixed guide vane by welding on hard alloy |
| CN106762808A (en) * | 2017-03-22 | 2017-05-31 | 黄河水利委员会黄河水利科学研究院 | A kind of big flow is high-lift to draw wear-resisting choma of yellow centrifugal water pump and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089289A (en) * | 1993-01-08 | 1994-07-13 | 宋君亮 | Energy-saving anticorrosive paint |
| CN1147004A (en) * | 1996-08-21 | 1997-04-09 | 水机磨蚀试验研究中心 | Multilayer coat normal temp. coating and process thereof |
| CN1087758C (en) * | 1997-05-11 | 2002-07-17 | 化学工业部海洋涂料研究所 | Cavitation erosion preventing paint |
-
2003
- 2003-07-28 CN CNB031418570A patent/CN100443716C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251904A (en) * | 2011-06-13 | 2011-11-23 | 鲁毅 | Cavitation-resistant and energy-saving modification method of water turbine |
| CN102251904B (en) * | 2011-06-13 | 2013-01-30 | 深圳市百安百科技有限公司 | Cavitation-resistant and energy-saving modification method of water turbine |
| CN103994013A (en) * | 2014-04-24 | 2014-08-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Abrasion-proof method of water turbine fixed guide vane by welding on hard alloy |
| CN106762808A (en) * | 2017-03-22 | 2017-05-31 | 黄河水利委员会黄河水利科学研究院 | A kind of big flow is high-lift to draw wear-resisting choma of yellow centrifugal water pump and preparation method thereof |
| CN106762808B (en) * | 2017-03-22 | 2023-04-07 | 新疆华电和田水电有限责任公司 | High-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN100443716C (en) | 2008-12-17 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20160907 Address after: 201419 No. 1, Leizhou Road, Shanghai, Fengxian District Patentee after: SHANGHAI KANGDA NEW ENERGY MATERIAL Co.,Ltd. Address before: 201201 Shanghai city Pudong New Area Qing Road No. 655 Patentee before: SHANGHAI KANGDA NEW MATERIALS Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.1 Leizhou Road, Fengxian District, Shanghai, 201419 Patentee after: Shanghai Kangda New Material Technology Co.,Ltd. Address before: No.1 Leizhou Road, Fengxian District, Shanghai, 201419 Patentee before: SHANGHAI KANGDA NEW ENERGY MATERIAL Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081217 |