CN109611158A - A kind of industrial steam turbine 3600rpm high load capacity low-pressure stage movable vane piece - Google Patents

A kind of industrial steam turbine 3600rpm high load capacity low-pressure stage movable vane piece Download PDF

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Publication number
CN109611158A
CN109611158A CN201811299193.XA CN201811299193A CN109611158A CN 109611158 A CN109611158 A CN 109611158A CN 201811299193 A CN201811299193 A CN 201811299193A CN 109611158 A CN109611158 A CN 109611158A
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CN
China
Prior art keywords
blade
axial width
root
shroud
section
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.)
Pending
Application number
CN201811299193.XA
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Chinese (zh)
Inventor
刘象拯
隋永枫
马晓飞
初鹏
刘盼年
朱子奇
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Hangzhou Steam Turbine Co Ltd
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Hangzhou Steam Turbine Co Ltd
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Publication date
Application filed by Hangzhou Steam Turbine Co Ltd filed Critical Hangzhou Steam Turbine Co Ltd
Priority to CN201811299193.XA priority Critical patent/CN109611158A/en
Publication of CN109611158A publication Critical patent/CN109611158A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/301—Cross-sectional characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/302—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor characteristics related to shock waves, transonic or supersonic flow

Abstract

The present invention, which relates to, discloses a kind of industrial steam turbine 3600rpm high load capacity low-pressure stage movable vane piece, including blade, blade root and for making blade form the self-locking ladder-like access ramp shroud of whole circle, the height of blade is 467.61mm, root axial width is 103.26mm, root diameter (RD) is 1120mm, top axial width is 57.73mm, blade root is fir-tree type tilted blade root, the total height of blade root is 54.98mm, axial width is 133.0mm, blade shroud band circumferential shape is three ladder-like, with a thickness of 4 ~ 18mm, the axial width of shroud is 61.46mm, downstairs axial width is 21.17mm, intermediate ladder axial width is 26mm, upper ladder axial width is 14.29mm, pitch from blade root section to leaf top section with Chord ratio T/b changing rule are as follows: 0.51≤T/b≤0.86, pitch and blade profile section axial width ratio T/B changing rule from blade root section to leaf top section are as follows: 0.53≤T/B≤1.75, the high load capacity last stage movable vane has many advantages, such as that pneumatic efficiency is high, strength character is good, structurally reasonable, easy to assembly, is applied to 3600rpm high load capacity industrial steam turbine.

Description

A kind of industrial steam turbine 3600rpm high load capacity low-pressure stage movable vane piece
Technical field
The present invention relates to industrial steam turbine field, especially a kind of industrial steam turbine 3600rpm high load capacity low-pressure stage grade Movable vane piece.
Background technique
Some areas and country in the world, industrial generation field generally use revolving speed to determine the vapour of revolving speed for 3600rpm Turbine, this steam turbine is compared with the 3000rpm that the existing country uses determines the industrial steam turbine of revolving speed, and cost reduction, efficiency are more Height, but more difficulties are brought because intensity and vibration problem are designed to structure.
Summary of the invention
A kind of industrial steam turbine 3600rpm high designed the purpose of the present invention is to solve the deficiency of above-mentioned technology Load low-pressure stage movable vane piece is 1.2 times of conventional 3000r/min blade rotational speed, and high revolving speed improves the efficiency of blade, reduces Steam turbine size reduces steam turbine cost.Subsonic speed, transonic speed, supersonic design is respectively adopted in the vane foil；It develops The fir tree blade root structure of large bearing capacity, significantly reduces centrifugal stress suffered by blade root；Interlocking damping shroud is developed, it is significant to drop The low dynamic stress of blade.
Industrial steam turbine according to the present invention 3600rpm high load capacity low-pressure stage movable vane piece, including blade, blade root and use In making blade form the self-locking shroud of whole circle；The molded line of blade is variable cross-section twisted blade, has phase between the adjacent two sections of the blade To torsion, the blade is gradually reduced from root to top cross-section area；The height of the blade is 467.61mm, the blade Root axial width is 103.26mm, and the blade root diameter (RD) is 1120mm, and axial width is at the top of the blade 57.73mm, the blade root are fir-tree type tilted blade root, and the total height of the blade root is 54.98mm, and the blade root axial width is 133.0mm。
Further embodiment is that pitch to chord of the blade from blade root section to leaf top section is long than T/b changing rule Are as follows: 0.51≤T/b≤0.86；Pitch and blade profile section axial width ratio T/B changing rule from blade root section to leaf top section Are as follows: 0.53≤T/B≤1.75；Pitch and blade profile area of section ratio T/A changing rule from blade root section to leaf top section are as follows: 0.0286≤T/A≤0.1348。
Further scheme is that blade shroud band circumferential shape is three ladder-like, the thickness s of blade shroud band is 4~ 25mm, shroud tilt angle ALPHA be 0~35 °, axial width W be 61~75mm, downstairs axial width w1 be 15~ 25mm, upper ladder axial width w3 are 10~25mm, there is two contact surfaces self-locking for lopping at ladder in shroud.
Further embodiment is, axial width B variation range of the blade from root to top be 103.26mm~ 57.73mm, chord length b variation range are 108.19mm~117.13mm, the variation range of established angle BETA is 73.56 °~ 29.39 °, vane type line maximum gauge D variation range is 25.52mm~9.56mm, the variation range of inlet angle is 42.6 °~ 123.4 °, the variation range of the angle of outlet is 30.8 °~21.8 °.
Further scheme is, the height of the blade be respectively 0mm, 46.2mm, 93.4mm, 140.1mm, The corresponding blade in the place 186.8mm, 233.5mm, 280.2mm, 326.9mm, 373.6mm, 420.3mm, 467.0mm is axial wide Degree successively are as follows: 103.26mm, 101.34mm, 98.91 mm, 95.83mm, 91.83mm, 87.01mm, 81.70mm, 76.44mm, 71.13 mm, 64.93mm, 57.73mm, corresponding chord length is successively are as follows: 108.19mm, 108.85mm, 107.75mm, 110.75mm, 111.68mm, 112.60mm, 113.45mm, 114.43mm, 115.34 mm, 116.23mm, 117.14mm, institute are right The established angle answered is successively are as follows: 73.56 °, 69.13 °, 64.75 °, 60.41 °, 55.62 °, 50.81 °, 46.17 °, 41.95 °, 38.05 °, 33.90 °, 29.39 °, corresponding molded line maximum gauge is successively are as follows: 25.52mm, 24.58mm, 23.65mm, 22.42mm, 21.21mm, 19.50mm, 17.41mm, 15.44mm, 13.59mm, 11.56mm, 9.56mm, corresponding import Angle is successively are as follows: 42.6 °, 50.1 °, 59.4 °, 65.4 °, 75.9 °, 80.9 °, 90.1 °, 98.5 °, 104.7 °, 115.1 °, 123.4 °, the corresponding angle of outlet is successively are as follows: 30.8 °, 30.3 °, 32.3 °, 29.1 °, 26.2 °, 26.8 °, 26.5 °, 24.1 °, 24.3°、 21.2°、21.8°。
The resulting industrial steam turbine 3600rpm high load capacity low-pressure stage movable vane piece of the present invention, blade are designed using three-dimensional flow Technology design forms, and width, thickness and the cross-sectional area in section are gradually reduced by root to top, dullness smooth transition, edge The high direction blade of leaf has certain distortion rule, the requirement of blade static strength has been taken into account, along each thermal parameter regularity of distribution of blade Rationally, so that blade has good aeroperformance.It verifies, is carrying on the back through professional computational fluid dynamics software CFX and Numeca Pressure is 0.095bar, under the operating condition that exit Mach number is 0.5, and the pneumatic efficiency of place low-pressure stage group is 92% or so, max-flow Amount has good off design performance in 280t/h or more；Blade is included shroud, and whole circle self-locking damping type comes into leaves Piece, leaf top are stepped self-locking shroud, there is the gap of 0.0~0.3mm between each blade shroud band, under working speed, due to from The effect of mental and physical efforts, blade generate centainly anti-twisted, make to be bonded between shroud and shroud between blade, generate normal pressure and frictional force, increase The damping of system is added；Reach the whole circle self-locking structure of blade simultaneously, improve the vibration performance of blade, reduces dynamic suffered by blade answer Power；Blade root using fir-tree root design, blade is easy to assembly, can in back pressure 0.05bar~0.15bar, lower safe operation, Have a vast market application prospect.
Detailed description of the invention
Fig. 1 is blade front view of the present invention；
Fig. 2 is blade side view of the present invention；
Fig. 3 is blade top view of the present invention；
Fig. 4 is the folded schematic diagram of vane type line product of the present invention；
The adjacent two blade shroud bands top view of Fig. 5；
Fig. 6 is the self-locking connection schematic diagram of adjacent five blades of the invention；
Fig. 7 is blade profile parameters explanatory diagram one of the present invention；
Fig. 8 is blade profile parameters explanatory diagram two of the present invention；
Fig. 9 is blade profile parameters explanatory diagram three of the present invention；
Figure 10 is parameter declaration figure of the present invention.
In figure: shroud 1, blade 2, blade root 3.
Specific embodiment
The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.
Embodiment 1:
As shown in Figure 1, 2, 3, the 3600rpm high load capacity low-pressure stage movable vane piece of industrial steam turbine described in the present embodiment, It is leaving area 3.58m2 steam turbine for leaving area, it is a kind of variable cross-section twisted blade, including blade 2, blade root 3 and is used for So that blade is formed the self-locking shroud 1 of whole circle, the opposite leaf height of the blade 2 monotonicallys increase up to 100% by 0%, from blade root section to The pitch to chord of leaf top section is long than T/b changing rule are as follows: 0.51≤T/b≤0.86；Section from blade root section to leaf top section Away from blade profile section axial width ratio T/B changing rule are as follows: 0.53≤T/B≤1.75；Section from blade root section to leaf top section Away from blade profile section maximum gauge ratio T/D changing rule are as follows: 2.15≤T/D≤10.55；Section from blade root section to leaf top section Away from blade profile area of section ratio T/A changing rule are as follows: 0.0286≤T/A≤0.1348；Leaf from blade root section to leaf top section Type leading-edge radius R0 changing rule are as follows: 2.9mm≤R0≤1.5mm；Blade profile trailing edge radius R1 from blade root section to leaf top section Changing rule are as follows: 1.0mm≤R1≤0.57mm.Wherein, 2 height of blade is 467.61mm；The blade root 3 is fir-tree type Blade root, 3 axial width of blade root are 133mm, and blade is mounted in impeller slot by fir-tree root 3, axial to assemble；The leaf Body 3, leading edge, which is carried on the back, is equipped with part of hardening at arc, depending on length of hardening is as needed.
As shown in fig. 6, blade is single chip architecture when static, shroud 1 is not bonded, under working speed, due to centrifugal force Effect, blade 2 generate certain anti-twisted, make to generate normal pressure and frictional force between boss and shroud 1 and shroud 1, increase system Damping；Make the whole circle of blade simultaneously in groups, improves the vibration performance of blade.Simultaneously ladder-like shroud advantageously reduce blade from Heart load increases the rigidity of blade, improves blade safety.
The resulting industrial steam turbine 3600rpm high load capacity low-pressure stage movable vane piece of the present invention, blade are designed using three-dimensional flow Technology design forms, and width, thickness and the cross-sectional area in section are gradually reduced by root to top, dullness smooth transition, edge The high direction blade of leaf has certain distortion rule, the requirement of blade static strength has been taken into account, along each thermal parameter regularity of distribution of blade Rationally, so that blade has good aeroperformance.It verifies, is carrying on the back through professional computational fluid dynamics software CFX and Numeca Pressure is 0.095bar, under the operating condition that exit Mach number is 0.5, and the pneumatic efficiency of place low-pressure stage group is 92% or so, max-flow Amount has good off design performance in 280t/h or more；Blade is coming into leaves for the included whole circle self-locking damping type of shroud 1 Piece, Ye Dingyou shroud 1 have the gap of 0~0.3mm between each blade shroud band 1, under working speed, due to the work of centrifugal force It is generated with, blade 2 certain anti-twisted, makes to be bonded between shroud 1 and shroud 1 between blade, generate normal pressure and frictional force, increased and be The damping of system；Reach the whole circle self-locking structure of blade simultaneously, improve the vibration performance of blade, reduces dynamic stress suffered by blade；Leaf Root 3 is designed using fir-tree root, and blade is easy to assembly, can be safely operated at back pressure 0.05bar~0.15bar, is had wide Wealthy market application prospect.
Each section design parameter of blade is as follows:

Claims (3)

1. a kind of leaving area 3.58m2 industrial steam turbine 3600rpm high load capacity penult movable vane, including blade (1), blade root (2) and for making blade form the self-locking shroud (3) of whole circle, blade (1) molded line is variable cross-section twisted blade, blade (1) root The sectional area at portion to top is gradually reduced, and has relative torsion between adjacent two sections, it is characterised in that: blade (1) height For 467.61mm, the root axial width of the blade (1) is 103.26mm, and the root diameter (RD) of the blade (1) is 1120mm, The top axial width of the blade (1) be 57.73mm, the blade root (2) be fir-tree type tilted blade root, the blade root (2) it is total Height is 54.98mm, and the axial width of blade root (2) is 133mm.
2. leaving area 3.58m2 industrial steam turbine according to claim 1 3600rpm high load capacity penult movable vane, Be characterized in that: pitch to chord of the blade (1) from blade root section to leaf top section is long than T/b changing rule are as follows: 0.51≤ T/b≤0.86；Pitch and blade profile section axial width ratio T/B changing rule from blade root section to leaf top section are as follows: 0.53≤ T/B≤1.75；Pitch and blade profile area of section ratio T/A changing rule from blade root section to leaf top section are as follows: 0.0286≤T/A ≤0.1348。
3. leaving area 3.58m2 industrial steam turbine according to claim 1 3600rpm high load capacity penult movable vane, Be characterized in that: the circumferential shape of the shroud is three ladder-like, and the thickness s of the shroud is 4 ~ 25mm, the shroud inclination angle Spending ALPHA is 0 ~ 35 °, and the axial width W of the shroud is 61 ~ 75mm, the downstairs axial width w1 of the shroud is 15 ~ 25mm, the upper ladder axial width w3 of the shroud are 10 ~ 25mm, have at ladder in the shroud and two connect for lopping to be self-locking Contacting surface.
CN201811299193.XA 2018-11-02 2018-11-02 A kind of industrial steam turbine 3600rpm high load capacity low-pressure stage movable vane piece Pending CN109611158A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110242355A (en) * 2019-07-09 2019-09-17 杭州汽轮机股份有限公司 A kind of 645mm final stage moving blade of industrial steam turbine
CN111425260A (en) * 2020-03-27 2020-07-17 中国科学院工程热物理研究所 Last-stage moving blade structure and blade group suitable for high-power air turbine
CN111963252A (en) * 2020-09-03 2020-11-20 杭州汽轮机股份有限公司 Secondary and final moving blade and blade assembly of variable-rotating-speed large-flow industrial steam turbine
CN112253260A (en) * 2020-10-28 2021-01-22 杭州汽轮机股份有限公司 Penult-stage moving blade and moving blade group
CN112627901A (en) * 2020-12-18 2021-04-09 杭州汽轮动力集团有限公司 Heavy load turbine last-stage moving blade
JP7434199B2 (en) 2021-03-08 2024-02-20 株式会社東芝 turbine rotor blade

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CN103628926A (en) * 2013-10-30 2014-03-12 杭州汽轮机股份有限公司 3m<2>-steam-exhaust-area low-pressure stage set last stage blade of variable speed industrial steam turbine
CN103806946A (en) * 2013-10-30 2014-05-21 杭州汽轮机股份有限公司 Variable speed industrial steam turbine low-pressure stage group last stage blade with steam exhaust area of 2.1 m<2>
CN203948136U (en) * 2014-07-28 2014-11-19 杭州汽轮机股份有限公司 The low pressure stage group exhaust stage blade of leaving area 3.6m2 variable speed air cooling industrial steam turbine
CN104196573A (en) * 2014-07-28 2014-12-10 杭州汽轮机股份有限公司 Low-pressure last stage blade of rotating speed-variable air cooling industrial steam turbine with steam exhaust area of 3.6 m2

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CN102434223A (en) * 2011-12-13 2012-05-02 杭州汽轮机股份有限公司 Low-pressure stage final blade of large-flow air-cooled steam turbine
CN103628926A (en) * 2013-10-30 2014-03-12 杭州汽轮机股份有限公司 3m<2>-steam-exhaust-area low-pressure stage set last stage blade of variable speed industrial steam turbine
CN103806946A (en) * 2013-10-30 2014-05-21 杭州汽轮机股份有限公司 Variable speed industrial steam turbine low-pressure stage group last stage blade with steam exhaust area of 2.1 m<2>
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110242355A (en) * 2019-07-09 2019-09-17 杭州汽轮机股份有限公司 A kind of 645mm final stage moving blade of industrial steam turbine
CN110242355B (en) * 2019-07-09 2022-02-22 杭州汽轮机股份有限公司 645mm last-stage moving blade for industrial steam turbine
CN111425260A (en) * 2020-03-27 2020-07-17 中国科学院工程热物理研究所 Last-stage moving blade structure and blade group suitable for high-power air turbine
CN111425260B (en) * 2020-03-27 2023-03-24 中国科学院工程热物理研究所 Last-stage moving blade structure and blade group suitable for high-power air turbine
CN111963252A (en) * 2020-09-03 2020-11-20 杭州汽轮机股份有限公司 Secondary and final moving blade and blade assembly of variable-rotating-speed large-flow industrial steam turbine
CN111963252B (en) * 2020-09-03 2023-03-14 杭州汽轮动力集团股份有限公司 Secondary and final moving blade and blade assembly of variable-rotating-speed large-flow industrial steam turbine
CN112253260A (en) * 2020-10-28 2021-01-22 杭州汽轮机股份有限公司 Penult-stage moving blade and moving blade group
CN112253260B (en) * 2020-10-28 2022-11-25 杭州汽轮动力集团股份有限公司 Penult-stage moving blade and moving blade group
CN112627901A (en) * 2020-12-18 2021-04-09 杭州汽轮动力集团有限公司 Heavy load turbine last-stage moving blade
CN112627901B (en) * 2020-12-18 2022-08-12 杭州汽轮动力集团有限公司 Heavy load turbine last-stage moving blade
JP7434199B2 (en) 2021-03-08 2024-02-20 株式会社東芝 turbine rotor blade

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