CN100340740C - Superhigh pressure impact steam turbine - Google Patents
Superhigh pressure impact steam turbine Download PDFInfo
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- CN100340740C CN100340740C CNB200410078145XA CN200410078145A CN100340740C CN 100340740 C CN100340740 C CN 100340740C CN B200410078145X A CNB200410078145X A CN B200410078145XA CN 200410078145 A CN200410078145 A CN 200410078145A CN 100340740 C CN100340740 C CN 100340740C
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Abstract
The present invention discloses a superhigh pressure impact type steam turbine which comprises a single cylinder, a single rotor and a vane stage composed of a plurality of static vanes arranged on the cylinder and a plurality of movable vanes arranged on the rotor, wherein the single cylinder comprises a high pressure cylinder body and a middle and low pressure cylinder body, a cylinder is integrally formed from the high pressure cylinder body and the middle and low pressure cylinder body, and the single rotor is arranged in the single cylinder. The superhigh pressure impact type steam turbine of the present invention uses the structure with the single cylinder and the single rotor, and compared with the existing multi-cylinder multi-rotor steam turbine, the present invention can greatly reduce the volume of the whole steam turbine. The present invention has the advantages of simple and compact structure and fabricating cost reduction. Due to the increase of the electric network capacity in China, the peak demand of thermal power generating units becomes high. The steam turbine of the present invention is designed in a complete two-shift operation and has larger capacity, and is suitable for requirements of the electric development of the electric network construction in China.
Description
Technical field
The present invention relates to a kind of steam turbine, more particularly, the present invention relates to a kind of superhigh pressure impact steam turbine.
Background technique
Steam turbine is one of crucial power equipment during thermal power station builds, and is the energy conversion device that thermal power transfer is become mechanical energy and then convert electric energy to.By high temperature, the high pressure steam of boiler for producing, through steam turbine, convert heat energy and pressure potential the mechanical energy of steam turbine to, drive turbine rotor and do work, this mechanical work passes to generator by rotating shaft of steam turbine, thereby converts mechanical energy to electric energy.
Steam turbine can be divided into impulse steam turbine and reaction turbine according to its steam flow working principle difference in turbine stage.For impulse steam turbine, steam mainly expands in the stator blade passage and does work, and only changes the steam flow direction in the movable vane passage, does not expand, and the level reaction degree of turbine is little.The steam turbine overwhelming majority that present domestic design is produced is an impulse steam turbine.
Steam turbine for needs acquisition 125MW～200MW output power adopts superhigh pressure impact steam turbine usually.Superhigh pressure impact steam turbine is meant that its admission initial conditions the best takes scope: 530 ℃～560 ℃ of pressure 12.7Mpa～13.7Mpa, temperature.
In the superhigh pressure impact steam turbine design of existing 125MW～200MW power level, generally popular technological scheme is to adopt multi-cylinder, many rotors, many steam discharges structure, and this is because the ultrahigh pressure admission initial conditions of this power level steam turbine determines.For superhigh pressure turbine, if will reach the output power of 125MW～200MW, corresponding steam flow and outlet back pressure coupling must be arranged, carry out thermodynamic system design and through-flow pneumatic design according to these parameters.Owing to restricted by many-sided factors such as turbine materials intensity, technology, aeroperformance, inside and outside steam turbine producer of predecessor State adopts many rotors, multi-cylinder, many steam discharges structural type invariably to this power level steam turbine, mainly be twin-tub, double flow structure, three cylinders, double flow structure are also arranged.Existing steam turbine is divided into a plurality of independently cylinders, for example mesohigh cylinder and low pressure (LP) cylinder according to the working pressure of steam in steam turbine.Be provided with an independently rotor in each cylinder, link together by coupling between a plurality of rotors.Steam adopts a plurality of steam-expelling ports when steam turbine is discharged.
For the multi-cylinder of existing ultrahigh pressure steam inlet condition, many rotors, many steam discharges structure steam turbine, exist complex structure, size is big, and materials are many, shortcomings such as manufacture cost height.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of existing superhigh pressure impact steam turbine, a kind of new superhigh pressure impact steam turbine is provided.
To achieve these goals, the invention provides a kind of superhigh pressure impact steam turbine, comprise cylinder and rotor, and by being arranged on a plurality of stator blades on the cylinder and being arranged on the leaf-level that epitrochanterian a plurality of moving vane constitutes; Described steam turbine only comprises single cylinder and single rotor, described single cylinder comprises high pressure cylinder body and mesolow cylinder body, described high pressure cylinder body and mesolow cylinder body form a cylinder on the whole, high pressure steam stream flows out by described high pressure cylinder body acting back, through the boiler backheat, flow into the acting of mesolow cylinder body again; Described single rotor is arranged in the described single cylinder, and the span between two bearing fulcrums of described rotor is 6000mm～7000mm; Described steam turbine only comprises a steam-expelling port that is used for steam is discharged steam turbine, and described steam-expelling port is arranged on the described mesolow cylinder body.
Having a part of cylinder body in the described high pressure cylinder body at least is double-deck cylinder body.The internal diameter of described mesolow cylinder body increases gradually.
Described moving vane is installed on the described rotor by impeller, and described impeller monobloc forging is configured as one with described rotor on described rotor.Described steam turbine comprises 8～11 high pressure leaf-level and 10～15 mesolow leaf-level.The blade height of described mesolow leaf-level increases gradually, and the place reaches maximum at the outlet final stage moving blade.
Described outlet final stage moving blade has a loose lacing wire.The blade root of described outlet final stage moving blade is a fir tree blade root.The top of described outlet final stage moving blade has the shroud of self-locking structure.
Superhigh pressure impact steam turbine of the present invention adopts single cylinder single rotor structure, and the volume of whole steam turbine can reduce greatly than existing many rotors of multi-cylinder steam turbine, and simple in structure, has reduced manufacture cost, has improved the stability of steam turbine work.The present invention be adapt to the peak load regulation network requirement, two-shift operation and design than the high power turbine unit.Along with the increase day by day of Chinese net capacity, more and more higher to the peak regulation requirement of fired power generating unit, this product is the larger capacity steam turbine set of complete two-shift operation design, and the new equipment that adapts to the electric power development needs is provided for Chinese power grid construction.
Description of drawings
Fig. 1 is the sectional drawing of superhigh pressure impact steam turbine of the present invention;
Fig. 2 is the rotor structure schematic representation in the steam turbine of Fig. 1;
Fig. 3 is the structural representation of the not level outlet moving vane in the steam turbine of Fig. 1;
Fig. 4 be among Fig. 1 the a-quadrant partial enlarged drawing;
Fig. 5 be among Fig. 1 the B zone partial enlarged drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
As shown in Figure 1, steam turbine 200 of the present invention comprises a cylinder 220, these cylinder 220 along continuous straight runs horizontal expansions.Be provided with single rotor 210 in the cylinder 220, this rotor 210 horizontal expansion in cylinder 220, the two ends 211 and 212 of rotor 210 are rotatably mounted to respectively on the bearing 231 and 232 at cylinder 220 two ends.Steam turbine 200 comprises multistage blade, each leaf-level is all formed by moving vane 241 with stator blade 242, and wherein, moving vane 241 is fixed on the rotor 210, and stator blade 242 is fixed on the inwall of cylinder 220, only indicates the moving vane 241 and the stator blade 242 of one of them leaf-level in Fig. 1.
For the steam turbine of 125MW～200MW output power grade, its initial steam pressure is usually at 12.7Mpa～13.7Mpa, and throttle (steam) temperature is usually at 530 ℃～560 ℃.After the high temperature and high pressure steam that meets aforementioned parameters enters steam turbine, drive the rotor acting of steam turbine.Along with steam does work in steam turbine, along the travel path of steam in steam turbine, the pressure of steam is also reducing gradually.In the present invention, according to the size of steam in the steam turbine internal pressure, steam turbine 200 can be divided into 252 two parts of high pressure section 251 and mesolow section, in Fig. 1, high pressure section 251 and mesolow section 252 are divided with axis 260 basically.As shown in Figure 1, cylinder 220 is provided with the first admission passage 271, the steam that comes out from the boiler (not shown) at first enters steam turbine 200 along arrow 281 directions from the first admission passage 271, drive rotor 210 by high pressure section 251 actings and rotate, go out vapour passage 272 from first then and flow out high pressure section 251 along arrow 282 directions.Steam is after high pressure section 271 actings, and its pressure is reduced to 2.0Mpa～3.0Mpa usually.Go out steam that vapour passage 272 flows out after boiler (not shown) backheat from first, flow to the second admission passage 273 on the steam turbine 200, the mesolow section 252 that enters steam turbine 200 along direction shown in the arrow 283 by the pipeline (not shown).Steam continues 210 rotations of acting drive rotor in the mesolow section 252 of steam turbine 200.At last, steam is discharged from the steam-expelling port 274 on the steam turbine 200, and condenser 290 condensations of flowing through are separated out.The water of condensation that forms after the condensation returns the boiler heating by drainage pump, finishes heat, the merit transmission circulation of water vapor.In the present invention, whole steam turbine 200 is only discharged from single steam-expelling port 274 at last, is single vapour structure.
Being arranged among Fig. 2 of rotor 210 of the present invention and leaf-level can be seen clearlyer.As shown in Figure 2, than many rotor structures of the prior art, rotor 210 of the present invention is an integral rotor.There are two bearings fulcrum 311 and 312 in rotor 210 two ends, are used for being connected with 232 with two bearings 231 of Fig. 1 respectively.When practical application, the span between the two bearings fulcrum 311 and 312 of rotor 210 is chosen between 6000mm～7000mm usually, and two bearings fulcrum span is 6140mm in one embodiment.
As shown in Figure 2, rotor 210 is provided with a plurality of moving vanes 241.In the prior art, moving vane normally is connected on the rotor by being sleeved on epitrochanterian impeller; And in the present invention, preferably with impeller 320 monobloc forgings on rotor 210, unitary moulding is an integral rotor 210, has improved impeller intensity, has improved the reliability of rotor, rotor 210 does not have center hole and equalizing orifice, has improved the intensity and the Security of rotor yet.
Similar with Fig. 1, according to axis 260, consistent with the segmentation of steam turbine 200, rotor 210 also can be divided into high pressure section 211 and mesolow section 212, be to be understood that, here carrying out segmentation according to axis 260 only is to carry out segmentation and make following description better understand according to the working pressure of steam, and rotor 210 itself is still the rotor of a monobloc forging.In order to make steam turbine 200 reach the output power of 125MW～200MW, 8～11 moving vanes 241 can be set on rotor high pressure section 211 usually, and on rotor mesolow section 212,10～15 moving vanes 241 can be set.In fact be readily appreciated that all corresponding stator blade 242 that is fixed on cylinder 220 inwalls of each moving vane 241, and dynamic and static blade 241 and 242 interlaced arrangement are formed steam turbine turbine blade level.That is to say that the high pressure section 251 of steam turbine 200 has 8～11 leaf-level, be the high pressure leaf-level; And mesolow section 252 has 10～15 leaf-level, is the mesolow leaf-level.In the embodiment of Fig. 2, high pressure section partly is 9 grade blades, and the mesolow section partly is 12 grade blades.Moving vane 241 on the rotor 210 is arranged to divide anti-steam flow in the axis 260, with the end thrust of balancing rotor 210.
Because steam turbine 200 provided by the invention is the steam inlet conditions that are applied to ultrahigh pressure, extra high pressure steam by a plurality of leaf-level turbines after cooling, expand, its volume flow sharply increases, this just requires the not level of steam turbine 200 to export to have certain flow area.As shown in Figure 2, on rotor 201, the height of the moving vane 241 of mesolow leaf-level increases gradually, and 242 places reach maximum at final stage outlet moving vane.Usually, the design height of final stage outlet moving vane 242 is chosen between 800mm～1000mm, is 900mm in one embodiment.Final stage outlet moving vane 242 is seen clearlyer in Fig. 3, has a loose lacing wire 331 in the middle of the blade, and this is to design in order to prevent this movable vane flutter.The blade root of blade 242 is a fir tree blade root 332.Blade 242 tops have the shroud 333 of self-locking structure.
Return Fig. 1, steam turbine 200 of the present invention has a block head cylinder 220 on the whole.Block head cylinder 220 is turning circle cylinders, cylinder 220 can be divided into high pressure cylinder body 221 and mesolow cylinder body 222, vertical flange by built-in bolt between high pressure cylinder body 221 and the mesolow cylinder body 222 connects into a cylinder body 220, and the position of vertical flange bolt (not shown) is referring to the dot and dash line 550 of Fig. 5.Should be noted that in the present invention high pressure cylinder body 221 and mesolow cylinder body 222 constitute a cylinder on the whole, and are different from a plurality of cylinder of the prior art.
The front portion of high pressure cylinder body 221 comprises the pair of lamina structure, and this sees clearlyer in Fig. 4.As shown in Figure 4, the front portion of high pressure cylinder body 221 comprises outer cylinder 411 and internal layer cylinder 412.The rear portion of high pressure cylinder body 221 is the diaphragm housing ring structure, comprises outer cylinder 411 and diaphragm housing ring 413.Be inclusive with many row's turbine stator blades 242 in high pressure internal layer cylinder 412 and the diaphragm housing ring 413.Also has gland seal device 414 in the rear end of high pressure cylinder body 221.For mesolow cylinder body 222, corresponding to the increase of mesolow leaf-level blade height, the internal diameter of cylinder body 222 also enlarges gradually.See clearlyer from Fig. 5, the mesolow cylinder adds the diaphragm housing ring structure for single-shell casing on the whole, comprises single-shell casing 511 and diaphragm housing ring 512, is inclusive with many row's turbine stator blades 242 in diaphragm housing ring 512 equally.
Claims (9)
1, a kind of superhigh pressure impact steam turbine comprises cylinder and rotor, and by being arranged on a plurality of stator blades on the cylinder and being arranged on the leaf-level that epitrochanterian a plurality of moving vane constitutes; It is characterized in that, described steam turbine only comprises single cylinder and single rotor, described single cylinder comprises high pressure cylinder body and mesolow cylinder body, described high pressure cylinder body and mesolow cylinder body form a cylinder on the whole, high pressure steam stream flows out by described high pressure cylinder body acting back, through the boiler backheat, flow into the acting of mesolow cylinder body again; Described single rotor is arranged in the described single cylinder, and the span between two bearing fulcrums of described rotor is 6000mm～7000mm; Described steam turbine only comprises a steam-expelling port that is used for steam is discharged steam turbine, and described steam-expelling port is arranged on the described mesolow cylinder body.
2, superhigh pressure impact steam turbine according to claim 1 is characterized in that, having a part of cylinder body in the described high pressure cylinder body at least is double-deck cylinder body.
3, superhigh pressure impact steam turbine according to claim 1 is characterized in that, the internal diameter of described mesolow cylinder body increases gradually.
4, superhigh pressure impact steam turbine according to claim 1 is characterized in that, described moving vane is installed on the described rotor by impeller, and described impeller monobloc forging is configured as one with described rotor on described rotor.
5, superhigh pressure impact steam turbine according to claim 1 is characterized in that, described steam turbine comprises 8～11 high pressure leaf-level and 10～15 mesolow leaf-level.
6, superhigh pressure impact steam turbine according to claim 5, the blade height of described mesolow leaf-level increases gradually, and the place reaches maximum at the outlet final stage moving blade.
7, superhigh pressure impact steam turbine according to claim 6 is characterized in that, described outlet final stage moving blade has a loose lacing wire.
8, superhigh pressure impact steam turbine according to claim 6 is characterized in that, the blade root of described outlet final stage moving blade is a fir tree blade root.
9, superhigh pressure impact steam turbine according to claim 6 is characterized in that, the top of described outlet final stage moving blade has the shroud of self-locking structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410078145XA CN100340740C (en) | 2004-09-17 | 2004-09-17 | Superhigh pressure impact steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410078145XA CN100340740C (en) | 2004-09-17 | 2004-09-17 | Superhigh pressure impact steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1749530A CN1749530A (en) | 2006-03-22 |
| CN100340740C true CN100340740C (en) | 2007-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB200410078145XA Expired - Fee Related CN100340740C (en) | 2004-09-17 | 2004-09-17 | Superhigh pressure impact steam turbine |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963728B (en) * | 2015-06-25 | 2017-07-07 | 北京全三维能源科技股份有限公司 | A kind of superhigh pressure impact steam turbine |
| CN104948235A (en) * | 2015-07-03 | 2015-09-30 | 北京全三维能源科技股份有限公司 | Super-high pressure impulsion type steam turbine |
| CN105201563B (en) * | 2015-07-22 | 2017-01-18 | 赵连新 | Multi-stage injection impact type turbine engine |
| CN108035775A (en) * | 2018-01-08 | 2018-05-15 | 翁志远 | Rotor, steam turbine and prime mover equipment of steam turbine |
| CN109026216A (en) * | 2018-07-18 | 2018-12-18 | 哈尔滨汽轮机厂有限责任公司 | A kind of resuperheat reaction turbine of subcritical 80MW grade |
| CN116122912A (en) * | 2022-11-23 | 2023-05-16 | 哈电发电设备国家工程研究中心有限公司 | 60MW reaction type intermediate air inlet one-time reheating air turbine and operation method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB100369A (en) * | 1915-04-28 | 1917-04-12 | Oerlikon Maschf | High Power and Speed Turbine Plant. |
| CN1023505C (en) * | 1989-04-26 | 1994-01-12 | Gec阿尔斯托姆公司 | Single hp-mp internal stator for steam turbine with controlled steam conditioning |
| CN1034525C (en) * | 1991-04-19 | 1997-04-09 | Gec阿尔斯托姆有限公司 | Impulse turbine with drum rotor, and improvements to such turbines |
| CN1092746C (en) * | 1997-01-14 | 2002-10-16 | 西门子公司 | Steam turbine |
| CN1436918A (en) * | 2002-02-06 | 2003-08-20 | 西门子公司 | Fluid machinery with high pressure and lower pressure sectors |
| CN1474033A (en) * | 2003-08-08 | 2004-02-11 | 黄少斌 | Vortex wheel turbine |
-
2004
- 2004-09-17 CN CNB200410078145XA patent/CN100340740C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB100369A (en) * | 1915-04-28 | 1917-04-12 | Oerlikon Maschf | High Power and Speed Turbine Plant. |
| CN1023505C (en) * | 1989-04-26 | 1994-01-12 | Gec阿尔斯托姆公司 | Single hp-mp internal stator for steam turbine with controlled steam conditioning |
| CN1034525C (en) * | 1991-04-19 | 1997-04-09 | Gec阿尔斯托姆有限公司 | Impulse turbine with drum rotor, and improvements to such turbines |
| CN1092746C (en) * | 1997-01-14 | 2002-10-16 | 西门子公司 | Steam turbine |
| CN1436918A (en) * | 2002-02-06 | 2003-08-20 | 西门子公司 | Fluid machinery with high pressure and lower pressure sectors |
| CN1474033A (en) * | 2003-08-08 | 2004-02-11 | 黄少斌 | Vortex wheel turbine |
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| Publication number | Publication date |
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| CN1749530A (en) | 2006-03-22 |
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Granted publication date: 20071003 Termination date: 20130917 |