CN204738902U - Impacted style or inclined jet turbine nozzle - Google Patents
Impacted style or inclined jet turbine nozzle Download PDFInfo
- Publication number
- CN204738902U CN204738902U CN201520463699.5U CN201520463699U CN204738902U CN 204738902 U CN204738902 U CN 204738902U CN 201520463699 U CN201520463699 U CN 201520463699U CN 204738902 U CN204738902 U CN 204738902U
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- China
- Prior art keywords
- nozzle
- needle
- jet turbine
- stable section
- impact type
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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
Abstract
The utility model discloses an impacted style or inclined jet turbine nozzle, including nozzle body and nozzle needle, the needle point cone angle of nozzle needle is 36-38, and the best needle point cone angle is 37. According to impacted style or inclined jet turbine nozzle, life is markedly increased, is about 2-3 times at former nozzle, and the efflux is concentrated, and the unit is exerted oneself stably, and efficiency increases approximately 5-10%, and especially when non - full load, the effect is obvious, and maintenance and dismantle conveniently, and significantly reduce nozzle needle and nozzle maintenance duration improve the power station benefit.
Description
Technical field
The present invention relates to hydroelectric machine field, specifically a kind of impact type or inclined-jet turbine nozzle.
Background technique
China is the country that a water resources is abundant.As the energy conversion water turbine utilizing water resources, be mainly divided into two types, one is reaction turbine, and another kind is impulse turbine.For impulse turbine, the service behaviour of nozzle has great importance for water turbine, and the quality of the service behaviour of nozzle is then determined by the shape of nozzle.Existing water turbine nozzle needle is all based on 45 ~ 67 ° of schemes, nozzle needle surface of contact is 2 ~ 3mm, there is no fluid stable section, damage by easily causing nozzle and nozzle needle during nozzle when unit operation runs into foreign material, thus cause jet instability and unit output decrease in efficiency, occur with the most common failure such as runner water dumping and bearing water inlet simultaneously.And nozzle adopts most built-in type, maintain and replace is very difficult.
Summary of the invention
The object of this invention is to provide a kind of impact type or inclined-jet turbine nozzle, improving working life by improving nozzle, ensureing that unit output is stablized, maintenance and convenient disassembly.
The present invention's adopted technological scheme of dealing with problems is: a kind of nozzle of impulse water turbine, comprises nozzle body and nozzle needle, and the needle point cone angle of described nozzle needle is 36 ~ 38 °, and best needle point cone angle is 37 °.
Described nozzle needle back segment is straightway, and this planarea is consistent with the angle that nozzle inner face is formed and nozzle needle wedge angle, general scope of design 36 ~ 38 °, best angle 37 °.
The fluid stable section of described nozzle comprises outer stable section and interior stable section, and outer stable section length is 10mm; Interior stable section length is 10 ~ 20mm, and adapt with nozzle needle shape, gradient is identical, the water surface also.
Described nozzle is crossed water engaging surface and is adopted stainless steel veneer, thickness 2 ~ 3mm, described nozzle needle front end and adopt stainless steel veneer with nozzle surface of contact, thickness 2 ~ 3mm.
Described nozzle needle needle point excessive portion chamfering, cutting removes.
Described nozzle arrangements is external mounted, and nozzle is by being contained on nozzle carrier outside bolt.
In the high head run-off river power station running of mountain area, carry out adjustment owing to there is no reservoir to run, carry out the water yield to change with natural runoff, unit adjusts the amount of overcoming at any time and remains on the situation that high head operation prevents forebay emptying, therefore unit proposes high requirement to adjustment, and the key position regulated is nozzle, nozzle needle.Existing unit (about 50%) when insufficient water sources is exerted oneself less just there will be following problem: impeller water dumping appears in unit, affects bearing water inlet and damages, to exert oneself and efficiency sharply declines.Main cause is that injection stream dispersion is not concentrated, and part current inject directly to bucket edge or outside.And cause the main cause of spray dispersion be 45 ° of-67 ° of nozzle needles (mouth) when producing jet because of angle comparatively mass-flow mutually collide, without jet stability section, and distance runner wheel is far away, no matter refer to jet schematic diagram, from Fig. 2,3,4, be 45 ° of nozzle needles, or 67 ° of nozzle needles, all have amplification after its jet delivery nozzle, the jet of 37 ° of nozzle needles then without amplification, substantially linearly.
The applicant is by carrying out the discovery of water turbine Maintenance And Test for many years by the highest and not fragile for nozzle needle and nozzle angle correction turbine efficiency about 37 ° time.Increase nozzle fluid stable section to ensure nozzle intensity and fluid stable performance simultaneously.Adopted by water engaging surface stainless steel veneer 2 ~ 3mm to solve nozzle needle, nozzle wear and corrosion, and ensure that sealing face length degree is 10 ~ 20mm, to ensure stagnant water effect.Nozzle arrangements is that external mounted is to facilitate nozzle needle to keep in repair and to change.Because nozzle needle angle reduces to cause length of needlepoint to increase, nozzle needle excessive portion chamfering, cutting is removed, to ensure that jet deflector can normally use, ensure unit safety, refer to jet schematic diagram.According to impact type of the present invention or inclined-jet turbine nozzle, working life obviously increases, be about 2 ~ 3 times, former nozzle, jet is concentrated, and unit output is stablized, efficiency increases about 5 ~ 10%, especially non-at full capacity time, effect obviously, and maintenance and convenient disassembly, greatly reduce nozzle needle and nozzle engineering time, improve power generation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention, is shown as state when nozzle needle and nozzle close.
Fig. 2 is the present invention's 37 ° of nozzle needle jet schematic diagram used.
Fig. 3 is 45 ° of nozzle needle jet schematic diagram.
Fig. 4 is 67 ° of nozzle needle jet schematic diagram.
Embodiment
Embodiment: with reference to Fig. 1, a kind of impact type or inclined-jet turbine nozzle, include nozzle body and be arranged on the nozzle needle 9 in nozzle.Described nozzle is adopted as external mounted, comprises nozzle carrier 1 and nozzle 6, designs bolt hole 4 outside nozzle carrier 1, and nozzle 6 is by being contained in outside bolt on nozzle carrier 1.Described nozzle 6 front end arranges fluid stable section, and fluid stable section comprises outer stable section 8 and interior stable section 7, and outer stable section 8 length is 10mm; Interior stable section 7 length is 10 ~ 20mm, and shape and nozzle needle shape adapt, and gradient is identical, sealing face when being also simultaneously closed state, arranging of double fluid state stable section ensures nozzle intensity and fluid stable performance, and sealing face length degree is 10 ~ 20mm, ensures stagnant water effect.Cross water engaging surface at nozzle 6 and adopt stainless steel veneer, thickness 2 ~ 3mm, solve nozzle needle, nozzle wear and corrosion.Described nozzle needle 9 is installed and is connected connecting rod 2, and needle point cone angle 10 scope of design of nozzle needle 9 is 36 ~ 38 °, and optimal needle pointed cone angle is 37 °; Described nozzle needle 9 back segment 3 is straight line, and this face, straightway place is consistent with the needle point cone angle 10 of nozzle needle with the angle 5 that nozzle inner face is formed, and namely scope of design is 36 ~ 38 °, and best needle point cone angle is 37 °.Nozzle needle front end 11 and adopt stainless steel veneer with nozzle surface of contact, thickness 2 ~ 3mm; Because nozzle needle angle reduces to cause length of needlepoint to increase, nozzle needle front end 11 excessive portion chamfering, cutting is removed, to ensure that jet deflector can normally use, ensure unit safety.
The present invention is applied in water power plant, spunyarn hole, and this water power plant is positioned at spunyarn hole village, Huang Mao garden town, Xupu County, Hunan Province, design 2x400KW, design head 200 meters, rated head 180 meters, the maximum service capacity 400KW of unit, water turbine model is CJA237-W-55/1*9 orifice size 92mm.In in November, 2014 power generation.New unit operation half a year, No. 1 machine drops to 380KW, and No. 2 machines drop to 345KW, takes water turbine apart and finds, No. 1 machine nozzle is without apparent damage, and No. 2 machine nozzle seriously corrodeds, simultaneously with unit bearing heating, noise vibration obviously increases.By by following parameter: orifice size is contracted to 87mm, nozzle needle angle changes 37 ° into, scabble nozzle needle and be greater than 97mm with external taper (namely nozzle needle back segment is for straightway), nozzle needle flow surface edge stainless steel, after transforming nozzle needle and nozzle, nozzle needle full-gear unit output reaches 400kw, and unit noise, vibrations, letdown flow all obviously reduce.
Claims (10)
1. impact type or an inclined-jet turbine nozzle, comprises nozzle body and nozzle needle, it is characterized in that: the needle point cone angle of described nozzle needle is 36 ~ 38 °.
2. impact type according to claim 1 or inclined-jet turbine nozzle, is characterized in that: the needle point cone angle of described nozzle needle is 37 °.
3. impact type according to claim 1 and 2 or inclined-jet turbine nozzle, is characterized in that: described nozzle needle back segment is straightway, and this straightway place plane is consistent with the angle that nozzle inner face is formed and nozzle needle wedge angle, is 36 ~ 38 °.
4. impact type according to claim 1 and 2 or inclined-jet turbine nozzle, is characterized in that: described nozzle needle back segment is straightway, and this straightway place plane is consistent with the angle that nozzle inner face is formed and nozzle needle wedge angle, is 37 °.
5. impact type according to claim 1 and 2 or inclined-jet turbine nozzle, is characterized in that: the fluid stable section of described nozzle comprises outer stable section and interior stable section, and outer stable section length is 10mm; Interior stable section length is 10 ~ 20mm, and adapt with nozzle needle shape, gradient is identical, the water surface also.
6. impact type according to claim 3 or inclined-jet turbine nozzle, is characterized in that: the fluid stable section of described nozzle comprises outer stable section and interior stable section, and outer stable section length is 10mm; Interior stable section length is 10 ~ 20mm, and adapt with nozzle needle shape, gradient is identical, the water surface also.
7. impact type according to claim 1 and 2 or inclined-jet turbine nozzle, is characterized in that: described nozzle is crossed water engaging surface and adopted stainless steel veneer, thickness 2 ~ 3mm, described nozzle needle front end and adopt stainless steel veneer with nozzle surface of contact, thickness 2 ~ 3mm.
8. impact type according to claim 3 or inclined-jet turbine nozzle, is characterized in that: described nozzle is crossed water engaging surface and adopted stainless steel veneer, thickness 2 ~ 3mm, described nozzle needle front end and adopt stainless steel veneer with nozzle surface of contact, thickness 2 ~ 3mm.
9. impact type according to claim 1 and 2 or inclined-jet turbine nozzle, is characterized in that: described nozzle needle needle point excessive portion chamfering, cutting removes.
10. impact type according to claim 1 and 2 or inclined-jet turbine nozzle, is characterized in that: described nozzle arrangements is external mounted, and nozzle is by being contained on nozzle carrier outside bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520463699.5U CN204738902U (en) | 2015-07-01 | 2015-07-01 | Impacted style or inclined jet turbine nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520463699.5U CN204738902U (en) | 2015-07-01 | 2015-07-01 | Impacted style or inclined jet turbine nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204738902U true CN204738902U (en) | 2015-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520463699.5U Expired - Fee Related CN204738902U (en) | 2015-07-01 | 2015-07-01 | Impacted style or inclined jet turbine nozzle |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912718A (en) * | 2015-07-01 | 2015-09-16 | 肖炳生 | Impact type or inclined water turbine nozzle |
-
2015
- 2015-07-01 CN CN201520463699.5U patent/CN204738902U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912718A (en) * | 2015-07-01 | 2015-09-16 | 肖炳生 | Impact type or inclined water turbine nozzle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20170701 |
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| CF01 | Termination of patent right due to non-payment of annual fee |