CN102251904B - Cavitation-resistant and energy-saving modification method of water turbine - Google Patents
Cavitation-resistant and energy-saving modification method of water turbine Download PDFInfo
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- CN102251904B CN102251904B CN2011101568988A CN201110156898A CN102251904B CN 102251904 B CN102251904 B CN 102251904B CN 2011101568988 A CN2011101568988 A CN 2011101568988A CN 201110156898 A CN201110156898 A CN 201110156898A CN 102251904 B CN102251904 B CN 102251904B
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a cavitation-resistant and energy-saving modification method of a water turbine. The method provided by the invention comprises the following steps: (1) carrying out sand blasting on the whole rotating wheel, blades and the lining of a draft tube and requiring to reach an Sa2.5 level; (2) repairing cavitation pits on the rotating wheel of the water turbine, the blades and the draft tube by adopting a titaniferous stainless steel inlaying method or a nano plastic steel polyurethane elastomer scraping method after nails are planted; and (3) coating a nano plastic steel 8103 wear-resistant and cavitation-resistant coating and a nano plastic steel 8102 ultra-smooth coating. The cavitation-resistant and energy-saving modification method provided by the invention is used for repairing the abrasion-resistant and cavitation-resistant components of the water turbine and coating the whole flow passage component, thereby improving the cavitation-resistant and abrasion-resistant capabilities of the water turbine, increasing the power execution and prolonging the overhaul period.
Description
Technical field:
The present invention relates to turbine technology field, be specially the method for the anti-cavitation erosion reducing energy consumption of a kind of water turbine.
Background technique:
Water turbine overflowing component is owing to work long hours and be subjected to silt underwashing, and exists when abrasion and cavitation erosion situation and mutually promote, and is especially more serious in turbine blade root and the abrasion of draft tube position and cavitation erosion situation.Abrasion and cavitation erosion can reduce exerting oneself of water turbine and efficient, and serious meeting causes blade perforation, and unit produces strong vibration, noise and fluctuation of load, cause the unit can not safe and stable operation.
Existing is when the water turbine units overhaul for the handling that water turbine is denuded and the parts that cavitate are general, adopts built-up welding or metal thermal spraying method to be repaired to lighter cavitation erosion and abrasion position, and larger cavitation erosion hole does not have too many way.Because water turbine is the core of equipment for hydroelectric station, the shutdown maintenance cost is high, and urgent need is a kind of in the industry can increase the anti-cavitation erosion of water turbine or abrasion ability, the technological scheme of prolonging overhaul period.
Summary of the invention:
The technical problem to be solved in the present invention provides the anti-cavitation erosion energy-conserving reconstruction method of a kind of water turbine, be used for to repair the water turbine parts of being denuded and cavitate, and then improves the anti-cavitation erosion of water turbine and abrasion ability, prolonging overhaul period.
For solving the problems of the technologies described above, the anti-cavitation erosion energy-conserving reconstruction method of a kind of water turbine that the present invention adopts comprises the steps:
Step 1, whole runner, blade and draft tube liner are done sand blast, require to reach the Sa2.5 level;
Step 2, adopt the titaniferous stainless steel to inlay method or plant nail after blade coating receive the cavitation erosion hole that plastic-steel polyurethane elastomer method repairs rotary wheel of water turbine, blade and draft tube liner;
Wherein said titaniferous stainless steel inlays method and comprises the steps:
A. clean the large cavitation erosion hole through sand blast;
B. get a piece of paper and be attached on the cavitation erosion hole, draw cavitation erosion hole profile with pen;
C. make 321 titanium stainless steel spare parts by paper drawing case, the spare part size should be less than pattern, so that install;
D. implant several screw rods with tapping method or the method that fastens in the hole, the screw rod spacing is no more than 30mm, and the titaniferous stainless steel spare part in correspondence bores good corresponding hole simultaneously;
E. fill whole cavitation erosion hole with receiving plastic-steel 8201 epoxy moulding repair materials;
F., titaniferous stainless steel spare part is installed, is amputated unnecessary screw rod and with the welding of its termination and titaniferous stainless steel spare part;
G. titaniferous stainless steel edge is repaired with receiving plastic-steel 8201 epoxy moulding repair materials;
The wherein said blade coating of planting behind the nail is received plastic-steel polyurethane elastomer method and is comprised the steps:
A. clean cavitation range;
B. with the mode of butt-joint with given shape bump nail welding at cavitation range, it is every square metre of 600-1000 that nail density is bumped in welding;
C. spray the primary coat of solvent type epoxy polyamide in cavitation erosion or abrasion zone;
D. blade coating is received plastic-steel polyurethane elastomer repair materials;
E. wait receiving after the plastic-steel polyurethane elastomer drying, prune excess stock, finish reparation;
Step 3, be coated with and accommodate plastic-steel 8103 wear-resisting cavitation coatings and receive plastic-steel 8102 superslide coatings;
The wherein said plastic-steel polyurethane elastomer of receiving, each constituent mass percentage is:
Wherein said plastic-steel 8201 each the constituent mass percentage of epoxy moulding repair materials of receiving are:
Wherein said each the constituent mass percentage of plastic-steel 8103 wear-resisting cavitation coatings of receiving is:
Wherein said each the constituent mass percentage of plastic-steel 8102 superslide coatings of receiving is:
The plastic-steel 8102 superslide coating products of receiving of the present invention meet the water hygiene requirement.
In above-mentioned modification scheme, receive plastic-steel 8103 wear-resisting cavitation coatings and receive the application zone of plastic-steel 8102 superslide coatings and comprise runner, blade and draft tube liner, but do not comprise and receive the zone that the plastic-steel polyurethane elastomer repairs.
In above-mentioned modification scheme, first coating is for receiving plastic-steel 8103 wear-resisting cavitation coatings, and second is for receiving plastic-steel 8102 superslide coatings, and total thickness is the 400-600 micron.
Good effect of the present invention is: the invention provides two kinds of safer reliable cavitation erosions and repair means, these two kinds of means have adopted respectively high performance titaniferous stainless steel and have received the plastic-steel polyurethane elastomeric materials, the base material of itself and water turbine is compared has larger strength and toughness, and the ability of opposing cavitation erosion and abrasion far surpasses the water turbine base material.
Water turbine after repairing by above-mentioned two kinds of means, can the problem of cavitation erosion abrasion change into change titaniferous stainless steel spare part or again blade coating receive the plastic-steel polyurethane elastomer, and can not damage turbine proper.Owing to all in normal-temperature operation, can as metal thermal spraying and built-up welding, not cause thermal stress in the whole work progress, affect repairing effect.
What repair employing in the most serious zone of cavitation erosion abrasion all is safe means of fixation (screw rod welds, plants nail), guarantees that titaniferous corrosion resistant plate and the plastic-steel polyurethane elastomer of receiving can not come off, and have guaranteed repairing effect.
By receiving the application of moulding 8103 wear-resisting cavitation coatings and receiving plastic-steel 8102 superslide coatings after water turbine cavitation erosion district is repaired; dried coating not only can prevent burn into cavitation erosion, abrasion by protection equipment; can also improve simultaneously the efficient of equipment, energy saving.
Because the symbiosis of cavitation erosion and abrasion and mutually promoting, the plastic-steel 8102 superslide coatings of receiving can make the smoothness of water turbine flow-passing surface increase, and have also just reduced the local cavitation erosion of the separation of flow that causes because wetted surfaces is uneven.Because the minimizing of bubble has increased the inflow-rate of water turbine of water turbine, thereby has improved efficient.
Can reduce the border turbulent flow of fluid in course of conveying owing to receive plastic-steel 8102 superslide coatings in addition, be equivalent to reduce the friction of fluid at the water turbine flow-passing surface, the frictional loss of head diminishes, and turbine efficiency is improved.
The plastic-steel 8102 superslide coatings of receiving are comprised of liquid epoxies, organic polyamine curing agent, nano lubricating friction-reducing additive, other color stuffing.Nano lubricating friction-reducing additive in the prescription belongs to the core of superslide cladding technique, and nano particle not only has humidification, also has high hydrophobic and slit self-repair function, and the lasting superslide energy-saving effect of coating is provided.
Special island two-phase MOLECULE DESIGN makes it that stronger wear-resistant anti-cavitation erosion ability be arranged to receive plastic-steel 8103 wear-resisting cavitation coatings, and this coating is formulated by low molecular weight liquid epoxy, organic polyamine curing agent, active wear-resisting color stuffing, endurable active toughener.Filming that at first low molecular weight liquid epoxy, organic polyamine are cross-linked to form has high crosslink density, and coating does not contain any solvent, has guaranteed the mechanical strength of coating; Active color stuffing is because energy and curing agent carry out chemical crosslinking, and it is particularly remarkable to strengthen effect; Endurable active toughener makes dried coating formation island structure, can to high pressure bubble and rigid particles wash away the formation cushioning effect, increased anti-cavitation erosion and the erosion resistance of coating.Receive plastic-steel 8103 wear-resisting cavitation coatings and the plastic-steel 8102 superslide coatings of receiving and to use or subregion uses according to actual conditions stacks.
Below be the typical performance of the material that arrives involved in the present invention, it is as follows to use prescription:
The wherein said plastic-steel polyurethane elastomer of receiving, each constituent mass percentage is:
Prescription 1.1
Performance parameter:
Prescription 1.2
Performance parameter:
Prescription 1.3
Performance parameter:
Wherein said plastic-steel 8201 each the constituent mass percentage of epoxy moulding repair materials of receiving are:
Prescription 2.1
Performance parameter:
Prescription 2.2
Performance parameter:
Prescription 2.3
Performance parameter:
Wherein said each the constituent mass percentage of plastic-steel 8103 wear-resisting cavitation coatings of receiving is:
Prescription 3.1
Prescription 3.2
Prescription 3.3
Wherein said each the constituent mass percentage of plastic-steel 8102 superslide coatings of receiving is:
Prescription 4.1
Prescription 4.2
Prescription 4.3
Embodiment:
The anti-cavitation erosion energy-conserving reconstruction method of a kind of water turbine provided by the invention comprises the steps:
Step 1, whole runner and blade are done sand blast, require to reach the Sa2.5 level;
Step 2, adopt the titaniferous stainless steel to inlay method or plant nail after blade coating receive the cavitation erosion hole that plastic-steel polyurethane elastomer method repairs rotary wheel of water turbine, blade and draft tube liner;
Wherein said titaniferous stainless steel inlays method and comprises the steps:
A. clean the large cavitation erosion hole through sand blast;
B. get a piece of paper and be attached on the cavitation erosion hole, draw cavitation erosion hole profile with pen;
C. make 321 titanium stainless steel spare parts by paper drawing case, the spare part size should be less than pattern, so that install;
D. implant several screw rods with tapping method or the method that fastens in the hole, the screw rod spacing is no more than 30mm, and the titaniferous stainless steel spare part in correspondence bores good corresponding hole simultaneously;
E. fill whole cavitation erosion hole with receiving plastic-steel 8201 epoxy moulding repair materials;
F., titaniferous stainless steel spare part is installed, is amputated unnecessary screw rod and with the welding of its termination and titaniferous stainless steel spare part;
G. titaniferous stainless steel edge is repaired with receiving plastic-steel 8201 epoxy moulding repair materials;
The wherein said blade coating of planting behind the nail is received plastic-steel polyurethane elastomer method and is comprised the steps:
A. clean cavitation range;
B. with the mode of butt-joint with given shape bump nail welding at cavitation range, it is every square metre of 600-1000 that nail density is bumped in welding;
C. spray the primary coat of solvent type epoxy polyamide in cavitation erosion or abrasion zone;
D. blade coating is received plastic-steel polyurethane elastomer repair materials;
E. wait receiving after the plastic-steel polyurethane elastomer drying, prune excess stock, finish reparation;
Step 3, be coated with and accommodate plastic-steel 8103 wear-resisting cavitation coatings and receive plastic-steel 8102 superslide coatings;
The wherein said plastic-steel polyurethane elastomer of receiving, each constituent mass percentage is:
Wherein said plastic-steel 8201 each the constituent mass percentage of epoxy moulding repair materials of receiving are:
Wherein said each the constituent mass percentage of plastic-steel 8103 wear-resisting cavitation coatings of receiving is:
Wherein said each the constituent mass percentage of plastic-steel 8102 superslide coatings of receiving is:
Receive plastic-steel 8103 wear-resisting cavitation coatings and receive the application zone of plastic-steel 8102 superslide coatings and comprise runner, blade and draft tube liner, but do not comprise and receive the zone that the plastic-steel polyurethane elastomer repairs.
First coating is for receiving plastic-steel 8103 wear-resisting cavitation coatings, and second is for receiving plastic-steel 8102 superslide coatings, and total thickness is 400 microns.
This embodiment for a concrete manifestation of technological scheme, is not the restriction to protection domain, and any have steps characteristic in the patented technology scheme and a scheme of scope feature, all among protection scope of the present invention.
Claims (3)
1. the anti-cavitation erosion energy-conserving reconstruction method of water turbine is characterized in that: comprise the steps:
Step 1, whole runner, blade and draft tube liner are done sand blast, require to reach the Sa2.5 level;
Step 2, adopt the titaniferous stainless steel to inlay method or plant nail after blade coating receive the cavitation erosion hole that plastic-steel polyurethane elastomer method repairs rotary wheel of water turbine, blade and draft tube;
Wherein said titaniferous stainless steel inlays method and comprises the steps:
A. clean the large cavitation erosion hole through sand blast;
B. get a piece of paper and be attached on the cavitation erosion hole, draw cavitation erosion hole profile with pen;
C. make 321 titanium stainless steel spare parts by paper drawing case, the spare part size should be less than pattern, so that install;
D. implant several screw rods with tapping method or the method that fastens in the hole, the screw rod spacing is no more than 30mm, and the titanium stainless steel spare part in correspondence bores good corresponding hole simultaneously;
E. fill whole cavitation erosion hole with receiving plastic-steel 8201 epoxy moulding repair materials;
F., titanium stainless steel spare part is installed, is amputated unnecessary screw rod and with the welding of its termination and titanium stainless steel spare part;
G. titanium stainless steel edge is repaired with receiving plastic-steel 8201 epoxy moulding repair materials;
The wherein said blade coating of planting behind the nail is received plastic-steel polyurethane elastomer method and is comprised the steps:
A. clean cavitation range;
B. with the mode of butt-joint with given shape bump nail welding at cavitation range, it is every square metre of 600-1000 that nail density is bumped in welding;
C. spray the primary coat of solvent type epoxy polyamide in cavitation erosion or abrasion zone;
D. blade coating is received plastic-steel polyurethane elastomer repair materials;
E. wait receiving after the plastic-steel polyurethane elastomer drying, prune excess stock, finish reparation;
Step 3, be coated with and accommodate plastic-steel 8103 wear-resisting cavitation coatings and receive plastic-steel 8102 superslide coatings;
The wherein said plastic-steel polyurethane elastomer of receiving, each constituent mass percentage is:
Wherein said plastic-steel 8201 each the constituent mass percentage of epoxy moulding repair materials of receiving are:
Wherein said each the constituent mass percentage of plastic-steel 8103 wear-resisting cavitation coatings of receiving is:
Wherein said each the constituent mass percentage of plastic-steel 8102 superslide coatings of receiving is:
2. the anti-cavitation erosion energy-conserving reconstruction method of a kind of water turbine according to claim 1, it is characterized in that: receive plastic-steel 8103 wear-resisting cavitation coatings and receive the application zone of plastic-steel 8102 superslide coatings and comprise runner, blade and draft tube liner, but do not comprise and receive the zone that the plastic-steel polyurethane elastomer repairs.
3. the anti-cavitation erosion energy-conserving reconstruction method of a kind of water turbine according to claim 1 and 2, it is characterized in that: first coating is for receiving plastic-steel 8103 wear-resisting cavitation coatings, and second is for receiving plastic-steel 8102 superslide coatings, and total thickness is the 400-600 micron.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101568988A CN102251904B (en) | 2011-06-13 | 2011-06-13 | Cavitation-resistant and energy-saving modification method of water turbine |
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| CN2011101568988A CN102251904B (en) | 2011-06-13 | 2011-06-13 | Cavitation-resistant and energy-saving modification method of water turbine |
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| CN102251904A CN102251904A (en) | 2011-11-23 |
| CN102251904B true CN102251904B (en) | 2013-01-30 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506801A (en) * | 2013-09-24 | 2014-01-15 | 四川蜀港水电工程技术有限责任公司 | Process for cavitation repair welding of through-flow turbine set runner chamber |
| CN106497333A (en) * | 2016-11-17 | 2017-03-15 | 无锡明盛纺织机械有限公司 | A kind of turbine blade modified epoxy coating antiseptic loses abrasionproof etching method |
| CN106519903A (en) * | 2016-11-17 | 2017-03-22 | 无锡明盛纺织机械有限公司 | Anti-corrosion and anti-abrasion method for organic coating of hydraulic turbine blade |
| CN111229566A (en) * | 2020-03-31 | 2020-06-05 | 国家电网有限公司 | Cavitation defect repairing coating for flow passage component of water turbine and preparation method thereof |
| CN111457164A (en) * | 2020-04-26 | 2020-07-28 | 中船黄埔文冲船舶有限公司 | Desulfurization system arranges outboard tube |
| CN111843373B (en) * | 2020-07-27 | 2022-06-03 | 云南联合电力开发有限公司 | Method for improving abrasion damage rapid cold repair strength of flow passage component of water turbine |
| CN113305500A (en) * | 2021-04-23 | 2021-08-27 | 杨斌 | Repair device for repair points with different sizes of flow passage components of self-adaptive water turbine |
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| CN1576574A (en) * | 2003-07-28 | 2005-02-09 | 上海康达化工有限公司 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
| CN101418706A (en) * | 2008-11-20 | 2009-04-29 | 浙江工业大学 | Anti-cavitation vane for steam turbine and method of forming same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4050133A (en) * | 1976-06-07 | 1977-09-27 | Cretella Salvatore | Method of refurbishing turbine vanes and the like |
| US6491208B2 (en) * | 2000-12-05 | 2002-12-10 | Siemens Westinghouse Power Corporation | Cold spray repair process |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1576574A (en) * | 2003-07-28 | 2005-02-09 | 上海康达化工有限公司 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
| CN101418706A (en) * | 2008-11-20 | 2009-04-29 | 浙江工业大学 | Anti-cavitation vane for steam turbine and method of forming same |
Non-Patent Citations (1)
| Title |
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| JP昭52-155141A 1977.12.23 |
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