CN102444529A - Water drain device for water turbine - Google Patents
Water drain device for water turbine Download PDFInfo
- Publication number
- CN102444529A CN102444529A CN2010102976509A CN201010297650A CN102444529A CN 102444529 A CN102444529 A CN 102444529A CN 2010102976509 A CN2010102976509 A CN 2010102976509A CN 201010297650 A CN201010297650 A CN 201010297650A CN 102444529 A CN102444529 A CN 102444529A
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- China
- Prior art keywords
- water
- turbine
- tail water
- spraying
- bend pipe
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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
- 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 discloses a water drain device for a water turbine. The device comprises a connecting pipe, a tail water bend pipe and a tail water taper pipe, wherein the surfaces of the tail water bend pipe and tail water taper pipe are provided with thermally sprayed abrasion resistant layers. The device has a simple structure, is convenient to manufacture and is resistant to impact and abrasion.
Description
Technical field
The present invention relates to a kind of water turbine, especially a kind of water turbine water draw-off; Belong to the water conservancy equipment technical field.
Background technique
Water turbine is to be the transformation of energy of current the dynamic power machine of rotating mechanical energy.Modern water turbine great majority are installed in the water power plant, are used for driving generator for electricity generation.In the water power plant, the water in the upper pond is guided water turbine into through aqueduct, promotes the rotary wheel of water turbine rotation, drives generator for electricity generation.The water of finishing merit then passes through the tail water row of conduits downstream.Head is high more, flow is big more, and the output power of water turbine is also just big more.Reaction turbine is a kind of of water turbine, and it has obtained all over the world using widely with the energy conversion efficiency height.Various types of reaction turbines all are provided with water feed apparatus, and the water feed apparatus of large and medium-sized vertical shaft reaction turbine generally is made up of spiral case, fixed guide vane and movable guide vane.The effect of spiral case is to be evenly distributed to current around the runner.When head below 40 meters the time, the spiral case of water turbine reinforced concrete cast on-site commonly used forms; When head is higher than 40 meters, the then normal metal spiral case that adopts welding or block cast.In reaction turbine, current are full of whole runner channel, and all blade receives the effect of current simultaneously, so under same head, runner diameter is less than impulse turbine.Their peak efficiency also is higher than impulse turbine, but when load variations, the efficient of water turbine receives influence in various degree.Reaction turbine all is provided with draft tube, and its effect is: the kinetic energy that reclaims outlet of rotary wheel place current; Current row downstream; When the mounting point of runner was higher than the level of tail water, this potential energy is converted into pressure can be reclaimed.For the water turbine of the big flow of low water head, the outlet kinetic energy of runner is relatively large, and the recyclability of draft tube has appreciable impact to the efficient of water turbine.The problem that existing technology exists is: current have produced the separation of flow and bump after getting into runner; And lasting defective mode gets into draft tube; Make the passable joint and the blowdown pipe of draft tube produce tangible cavitation corrosion phenomenon; Serious possibly wear out steel pipe, forms to leak and the jetting phenomenon safe operation that is directly endangering unit.Keep in repair with the method for traditional built-up welding that not only workload is big, and very difficult controlled deformation, be difficult for guaranteeing surface smoothness.Aspect material, as repairing the purpose then can not reach anti-cavitation corrosion with carbon steel, and can make itself and the more serious destruction of binding site generation of carbon steel base material with the stainless steel electrode welding.
Summary of the invention
Technical problem to above-mentioned existence the objective of the invention is: proposed a kind of simple in structure, easy to make, and the water turbine water draw-off of wear-corrosion resistance.
Technical solution of the present invention is achieved in that a kind of water turbine water draw-off; Comprise connecting tube, tail water bend pipe and draft tube cone, said connecting tube links to each other with draft tube cone with the tail water bend pipe; It is characterized in that there is the wear-corrosion resistance layer of thermal spraying on said tail water bend pipe and draft tube cone surface; The wear-corrosion resistance layer of said thermal spraying is two-layer: bottom and surface layer; There is a breeches pipe to be communicated with in the said connecting tube with vacuum breaker valve.
Working principle: plasma spray technology is a kind of surface strengthening technology.It adopts the thermal source of forms such as electric arc, plasma arc, combustion gas and oxygen; The cladding material fusing or the semi-molten that will be sprayed; And under the effect of air-flow, make it atomizing and form fine molten drop or high-temperature particle; Be ejected into treated matrix surface with very high flying speed, form coating with certain function.According to the difference of selected materials and spraying method, the gained coating have anti-corrosion damage, anti-oxidant, electricity is led and functions such as resistance, Chinese People's Anti-Japanese Military and Political College's gas and dip etching, resistance to chemical attack, heat insulation high temperature resistant, resizing, parts gap control.Expand to again in recent years and decorate or field such as bioengineering, thus thermal spraying be used widely in engineering circle, extend to each field such as space flight, aviation, traffic, railway, petrochemical industry, mining, metallurgy, electric power, machinery from initial simple and easy maintenance.Thermal spraying is according to providing the difference of thermal source to be divided into burning method and electrothermal way.The former comprises combustion flame spraying, detonation flame spraying, high speed flange spraying (HVOF) and subsonic speed flame spraying; The latter comprises electric arc spraying and plasma spraying.This several method of thermal spraying respectively has characteristics: low-melting materials such as minimum, suitable some metal or alloy of spraying of flame spraying cost; The running cost of electric arc spraying is low, and coating quality is better than flame spraying, but can only spray the material that some can conduct electricity; The powder flying speed of detonation flame spraying is very high, and coating is fine and close, and adhesive strength is high, but flexibility ratio is relatively poor, and purposes is restricted.The maximum characteristics of plasma spray technology are that deposition rate is high, and the spraying rate of a common unit is 5～8kg/h, can reach 15kg/h at most; The 2nd, selectable sprayed on material is extensive, and material is different, and coating performance also varies, thereby the coating surface that availability can be different satisfies various demand.
Advantage of the present invention is: since thermal spraying the wear-corrosion resistance layer, thereby make shock-resistant, the anti-abrasion of whole water draw-off.
Description of drawings
Below in conjunction with accompanying drawing technological scheme of the present invention is described further:
Fig. 1 is a water turbine water draw-off schematic representation of the present invention.
Wherein: 1 spiral case; 2 drain opening; 3 vent holes; 4 stators; 5 runners; 6 tail water bend pipe and draft tube cones; 7 vacuum breaker valves; 8 connecting tubes.
Embodiment
Below in conjunction with accompanying drawing the present invention is described.
Water turbine water draw-off as shown in Figure 1; Comprise connecting tube 8, tail water bend pipe and draft tube cone 6, there is the wear-corrosion resistance layer of thermal spraying on said tail water bend pipe and draft tube cone 6 surfaces; The wear-corrosion resistance layer of thermal spraying is two-layer: bottom and surface layer have a breeches pipe to be communicated with vacuum breaker valve 7 in the connecting tube 8.Here, we select bottom is the bottom that the supersonic electric arc spraying forms, and this bottom has adhesive strength height, porosity ratio is low, the rough surface rate is low, cost is low characteristics.Surface layer is the surface layer that subsonic speed flame spraying forms.Shock-resistant, the anti-abrasion of this surface layer.
The foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage that is familiar with this technology can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (1)
1. a water turbine water draw-off comprises connecting tube, tail water bend pipe and draft tube cone, and said connecting tube links to each other with draft tube cone with the tail water bend pipe, it is characterized in that, and there is the wear-corrosion resistance layer of thermal spraying on said tail water bend pipe and draft tube cone surface; The wear-corrosion resistance layer of said thermal spraying is two-layer: bottom and surface layer; There is a breeches pipe to be communicated with in the said connecting tube with vacuum breaker valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102976509A CN102444529A (en) | 2010-09-30 | 2010-09-30 | Water drain device for water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102976509A CN102444529A (en) | 2010-09-30 | 2010-09-30 | Water drain device for water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102444529A true CN102444529A (en) | 2012-05-09 |
Family
ID=46007370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102976509A Pending CN102444529A (en) | 2010-09-30 | 2010-09-30 | Water drain device for water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102444529A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139335A (en) * | 2018-10-17 | 2019-01-04 | 江西省莲花水轮机厂有限公司 | The hydraulic turbine |
| CN109519611A (en) * | 2018-11-22 | 2019-03-26 | 中国水电四局（祥云）机械能源装备有限公司 | A kind of draft tube elbow and manufacturing method |
-
2010
- 2010-09-30 CN CN2010102976509A patent/CN102444529A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139335A (en) * | 2018-10-17 | 2019-01-04 | 江西省莲花水轮机厂有限公司 | The hydraulic turbine |
| CN109519611A (en) * | 2018-11-22 | 2019-03-26 | 中国水电四局（祥云）机械能源装备有限公司 | A kind of draft tube elbow and manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120509 |