CN109057871A - Steam turbine integral shroud and integral shroud unit - Google Patents
Steam turbine integral shroud and integral shroud unit Download PDFInfo
- Publication number
- CN109057871A CN109057871A CN201810774854.3A CN201810774854A CN109057871A CN 109057871 A CN109057871 A CN 109057871A CN 201810774854 A CN201810774854 A CN 201810774854A CN 109057871 A CN109057871 A CN 109057871A
- Authority
- CN
- China
- Prior art keywords
- steam turbine
- integral shroud
- turbine integral
- boss
- unit
- 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.)
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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
- F01D5/16—Form or construction for counteracting blade vibration
Abstract
The present invention provides a kind of steam turbine integral shroud and integral shroud units, steam turbine integral shroud is connected and composed by multiple steam turbine integral shroud units, steam turbine integral shroud unit includes: ontology and boss, wherein, the ontology includes a first surface, two opposite end faces and two opposite sides, the boss is set on the first surface, and, first face of the boss and the first part of the end face collectively form a working face, adjacent steam turbine integral shroud unit realizes connection by being fitted close between the working face, blade vibration can be effectively prevented, improve the service life of turbine blade.
Description
Technical field
The present invention relates to steam turbine fields, and in particular to a kind of improved steam turbine integral shroud.
Background technique
Steam turbine is also referred to as steam turbine engine, is a kind of rotary steam power device, and high temperature and high pressure steam passes through solid
Nozzle is determined as being ejected on blade after the air-flow accelerated, makes the rotor rotation equipped with blade row, while external work done.Steam turbine
At work, movable vane piece is vibrated since high speed rotation is easy to generate, to influence the service life of movable vane piece.
Summary of the invention
The purpose of the present invention is to provide a kind of steam turbine integral shroud and integral shroud units, can be effectively prevented blade vibration,
Improve the service life of turbine blade.
The embodiment provides a kind of steam turbine integral shroud units, wherein the steam turbine integral shroud unit includes: this
Body and boss, wherein the ontology includes a first surface, two opposite end faces and two opposite sides, described convex
Platform is set on the first surface, also, the first part of the first face of the boss and the end face collectively forms one
Working face.In this way, the contact area between adjacent shrouds unit significantly increases, damping is improved, greatly reduces blade
Vibration, can be effectively reduced blade fatigue destruction, reduce maintenance, extend leaf longevity.
In one embodiment, steam turbine integral shroud unit further comprises the reinforcing rib for protruding from the first surface,
The reinforcing rib extends along the side surface direction of the ontology.To ensure the strength and stiffness of steam turbine integral shroud, and do not cause steamer
The wall thickening of machine integral shroud can be arranged reinforcing rib in the suitable position of steam turbine integral shroud, can effectively enhance the rigidity of blade,
Not only can be to avoid the deformation of steam turbine integral shroud, in some cases, the reinforcing rib for protruding from integral shroud surface can also improve vapour
Clearance leakage of blade tip situation in turbine.
In one embodiment, the sectional area of the reinforcing rib on perpendicular to the first surface outwardly direction by
It is decrescence small.Structure design, which can reduce integral shroud quality, reduces manufacturing cost, and shrouded blade can be kept well to vibrate spy
Property.
In one embodiment, the boss further comprises buckling parts, the buckling parts and the first surface
Angle is less than or equal to 90 degree.It is fitted to each other connection using the boss with buckling parts, in groups by the integral shroud unit connection on blade,
The connection between integral shroud unit can be made more to fasten.
In one embodiment, the working face has wear-resistant coating.The surface of wear-resistant coating is relatively rough, Ke Yijin
One step improves the structural damping between integral shroud unit, improves damping effect.
The embodiment provides a kind of steam turbine integral shrouds, described including multiple above-mentioned steam turbine integral shroud units
Steam turbine integral shroud unit is set to the top of turbine blade and extends along the circumferencial direction of turbine blade, and adjacent is described
Integral shroud unit is connected to each other by the working face.Steam turbine integral shroud makes the stable structure of blade, efficiently avoids rotating
The vibration of blade in journey, to extend the service life of turbine blade significantly.
In one embodiment, the end face further includes the non-working surface adjacent with the working face, the adjacent vapour
It is fitted close between the working face of turbine integral shroud unit, there is dress between the non-working surface of the adjacent steam turbine integral shroud unit
With gap.
In one embodiment, between the non-working surface and the working face at right angles, and the boss is L-type
Boss between the boss of the adjacent steam turbine integral shroud unit so as to be fitted close.
In one embodiment, two loop reinforcing ribs are arranged in steam turbine integral shroud outer surface, and the reinforcing rib leans on
The edge of two sides of the nearly ontology.
In one embodiment, the steam turbine integral shroud is set to the last stage movable vane on piece of steam turbine.Final stage moving blade
It is longest level-one in each grade blade of steam turbine, maximum centrifugal force load and resulting stress is born, in last stage movable vane
The overall performance that there is the steam turbine integral shroud of effectiveness in vibration suppression steam turbine can be improved on piece setting.
Detailed description of the invention
Hereafter by with clearly understandable mode by description of a preferred embodiment and in conjunction with attached drawing come to the present invention it is above-mentioned
Characteristic, technical characteristic, advantage and its implementation are further described, in which:
Fig. 1 schematically shows the cross-sectional view of steam turbine.
Fig. 2 schematically shows steam turbine integral shroud units according to an embodiment of the invention.
Fig. 3 schematically shows steam turbine integral shroud according to an embodiment of the invention.
Fig. 4 schematically shows the top views of steam turbine integral shroud according to an embodiment of the invention.
Label declaration:
1: steam turbine integral shroud unit
2: turbine blade
10: ontology
11: first surface
12: end face
121: first part
122: non-working surface
13: side
20: boss
21: the first faces
22: buckling parts
30: working face
40: reinforcing rib
Specific embodiment
In order to which the technical features, objects and effects of invention are more clearly understood, the Detailed description of the invention present invention is now compareed
Specific embodiment, identical label indicates identical part in the various figures.It is sometimes right for multiple identical composition parts
One of them is marked with symbol, and to other ellipsiss.
It each figure discussed below and is used to describe the various embodiments of the principle of the disclosure in the patent file
It only should not be construed as limiting the scope of the present disclosure by way of illustration and anyway.Those skilled in the art will manage
Solution, can implement the principle of the disclosure in any equipment suitably arranged.Reference example non-limiting embodiments are described
The various innovative teachings of the application.
Fig. 1 schematically shows the cross-sectional view of steam turbine.Steam turbine integral shroud unit 1 of the invention is mainly set to steamer
The top of machine blade 2, turbine blade 2 can be movable vane piece, as shown in Figure 1, steam turbine is fixed in the root of turbine blade 2
Shaft on, multiple blades 2, which form a circle, to be assemblied on turbine rotor, and a vapour is respectively mounted on the top of each blade 2
Turbine integral shroud unit 1, steam turbine integral shroud unit 1 can be integrally machined production using with blade 2, can also individually process steam turbine
Then integral shroud unit 1 is connect by modes such as welding with blade 2.The final stage moving blade of steam turbine is (for example, the leftmost side in Fig. 1
Blade) it is longest level-one in each grade blade of steam turbine, maximum centrifugal force load and resulting stress are born, in final stage
The overall performance that there is the steam turbine integral shroud of effectiveness in vibration suppression and integral shroud unit 1 steam turbine can be improved for setting in movable vane piece.
It is illustrated in combination with fig. 2 the specific embodiment of steam turbine integral shroud unit provided by the invention.Steam turbine integral shroud of the invention
Unit 1 mainly includes ontology 10 and boss 20, and boss 20 is the convex portion on ontology 10, and ontology 10 includes a first surface
11, two opposite end faces 12 and two opposite sides 13.First surface 11 can be the top of such as steam turbine integral shroud unit 1
Facial plane, boss 20 can be the rectangular block of such as one strip, and boss 20 protrudes from first surface 11, and boss 20 is arranged
At the edge of the end face of ontology 10 12, in this way, the first face 21 of boss 20 and the first part 121 of end face 12 can common structures
At a plane, which is working face 30.As shown in Fig. 2, steam turbine integral shroud unit 1 have former and later two end faces 12, two
A boss 20 is separately positioned at two end faces 12, each steam turbine integral shroud unit 1 passes through two working faces 30 and adjacent
Steam turbine integral shroud unit 1 closely connects, and forms the annular integral shroud an of entirety.Contact area between adjacent shrouds unit is significant
Increase, improves damping, it, can by the contact and friction between the working face 30 of adjacent steam turbine integral shroud unit 1
It is effectively reduced the resonance dynamic stress of blade 2, extends leaf longevity.Working face 30 can be for example flat with wear-resistant coating
The surface in face, wear-resistant coating is relatively rough, can be further improved the structural damping between integral shroud unit, improves damping effect.
As shown in Fig. 2, boss 20 can also have the buckling parts 22 of a bending, the buckling parts 22 and boss 20 of boss 20
The angle of first surface 11 be less than or equal to 90 degree, there is the boss 20 of buckling parts 22 to be fitted to each other connection, by the vapour on blade 2
Turbine integral shroud unit 1 connects in groups, the connection between steam turbine integral shroud unit 1 can be made more to fasten, to reduce rotation
The vibration of blade 2 in the process.
Fig. 3 and Fig. 4 are gone to, steam turbine integral shroud is made of multiple steam turbine integral shroud units 1 being interconnected with one another, steam turbine
Integral shroud unit 1 is formed by circumferencial direction along the top of turbine blade 2 and extends, and adjacent integral shroud unit 1 passes through working face
30 are connected to each other.The end face 12 of each steam turbine integral shroud unit 1 is concave-convex wave-like, and two adjacent with working face 30
Face is non-working surface 122, has fit-up gap between the non-working surface 122 of adjacent steam turbine integral shroud unit 1, fit-up gap
Size can be 0.2~0.4mm.Fig. 4 schematically shows the vertical views of steam turbine integral shroud according to an embodiment of the invention
Figure, end face 12 is Z-shape under depression angle, can be rectangular between non-working surface 122 and working face 30.In this embodiment,
Boss 20 is that L-type enhances the rigidity of blade and prevent so as to be fitted close between the boss 20 of adjacent steam turbine integral shroud unit 1
Only flutter.
For the strength and stiffness for ensuring steam turbine integral shroud, and do not cause the wall thickening of steam turbine integral shroud, it can also be in steamer
Reinforcing rib 40 is arranged in the suitable position of machine integral shroud, and reinforcing rib 40 protrudes from first surface 11, not only can be to avoid steam turbine integral shroud
Deformation, in some cases, the reinforcing rib for protruding from integral shroud surface can also improve clearance leakage of blade tip feelings in steam turbine
Condition reduces gap leakage flow rate, control blade petiolarea loss.In the particular embodiment, reinforcing rib 40 is along the side of ontology 10 13
Direction extends, specifically, two loop reinforcing ribs 40 can be set in steam turbine integral shroud outer surface, it is whole to reinforce steam turbine integral shroud
The stiffness and strength of body.As shown in Fig. 2, sectional area of the reinforcing rib 40 close to the Edge Enhancement muscle 40 of two sides 13 of ontology 10
It is gradually reduced on the outward direction perpendicular to first surface 11, this bottom thickness, the design of the structure of top thin of reinforcing rib 40
Integral shroud quality, which can be reduced, reduces manufacturing cost, and can keep the good vibration characteristics of shrouded blade.
" first ", " second " in being described herein only distinguish different objects for convenience of description, do not have practical significance, and
And do not indicate tangible difference between the two objects.Herein, " schematic " expression " is served as example, example or is said
It is bright ", any diagram, the embodiment for being described herein as " schematic " should not be construed to a kind of preferred or had more
The technical solution of advantage.
The series of detailed descriptions listed above are illustrated only for possible embodiments of the invention,
The protection scope that they are not intended to limit the invention, it is all without departing from equivalent embodiment made by technical spirit of the present invention or change
It should all be included in the protection scope of the present invention.
Claims (10)
1. steam turbine integral shroud unit (1), wherein the steam turbine integral shroud unit (1) includes: ontology (10) and boss (20),
In, the ontology (10) includes a first surface (11), two opposite end faces (12) and two opposite sides (13), institute
It states boss (20) to be set on the first surface (11), also, the first face (21) of the boss (20) and the end face
(12) first part (121) collectively forms a working face (30).
2. steam turbine integral shroud unit (1) as described in claim 1, which is characterized in that further comprise protruding from described first
The reinforcing rib (40) on surface (11), the reinforcing rib (40) extend along side (13) direction of the ontology (10).
3. steam turbine integral shroud unit (1) as claimed in claim 2, which is characterized in that the sectional area of the reinforcing rib (40) exists
Perpendicular to being gradually reduced in the first surface (11) outwardly direction.
4. steam turbine integral shroud unit (1) as described in claim 1, which is characterized in that the boss (20) further comprises button
Conjunction portion (22), the buckling parts (22) and the angle of the first surface (11) are less than or equal to 90 degree.
5. steam turbine integral shroud unit (1) as described in claim 1, which is characterized in that the working face (30) has wear-resisting painting
Layer.
6. steam turbine integral shroud, including multiple steam turbine integral shroud units (1) as described in claim 1, the steam turbine integral shroud list
First (1) is set to the top of turbine blade (2) and extends along the circumferencial direction of turbine blade (2), the adjacent vapour
Turbine integral shroud unit (1) is connected to each other by the working face (30).
7. steam turbine integral shroud as claimed in claim 6, which is characterized in that the end face (12) further includes and the working face
(30) adjacent non-working surface (122) are fitted close between the working face (30) of the adjacent steam turbine integral shroud unit (1), phase
There is fit-up gap between the non-working surface (122) of the adjacent steam turbine integral shroud unit (1).
8. steam turbine integral shroud as claimed in claim 7, which is characterized in that the non-working surface (122) and the working face
(30) between at right angles, and the boss (20) be L-type boss so that the adjacent steam turbine integral shroud unit (1) boss
(20) it is fitted close between.
9. steam turbine integral shroud as claimed in claim 6, which is characterized in that two loops are arranged in steam turbine integral shroud outer surface
Reinforcing rib (40), the reinforcing rib (40) is close to the edge of two sides (13) of the ontology (10).
10. steam turbine integral shroud as claimed in claim 6, which is characterized in that the steam turbine integral shroud is set to the end of steam turbine
In grade movable vane piece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820574927 | 2018-04-20 | ||
| CN201820574927X | 2018-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109057871A true CN109057871A (en) | 2018-12-21 |
Family
ID=64816631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810774854.3A Pending CN109057871A (en) | 2018-04-20 | 2018-07-16 | Steam turbine integral shroud and integral shroud unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109057871A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925030A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Low-pressure turbine simulation blade with embedded blade shroud damping |
| CN112228161A (en) * | 2020-10-16 | 2021-01-15 | 中国航发沈阳发动机研究所 | Blade and turbine thereof |
| CN115324657A (en) * | 2022-10-12 | 2022-11-11 | 中国航发四川燃气涡轮研究院 | Turbine working blade shroud cooling structure |
| WO2024055509A1 (en) * | 2022-09-14 | 2024-03-21 | 哈电发电设备国家工程研究中心有限公司 | Insertion piece and method for repairing gap between shrouds of titanium alloy blades of steam turbine |
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| JP2005207294A (en) * | 2004-01-22 | 2005-08-04 | Mitsubishi Heavy Ind Ltd | Turbine moving blade |
| CN101117896A (en) * | 2006-07-31 | 2008-02-06 | 通用电气公司 | Rotor blade and manufacturing method thereof |
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| CN106121734A (en) * | 2015-04-22 | 2016-11-16 | 安萨尔多能源瑞士股份公司 | There is the blade of tip shroud |
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2018
- 2018-07-16 CN CN201810774854.3A patent/CN109057871A/en active Pending
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| JP2005207294A (en) * | 2004-01-22 | 2005-08-04 | Mitsubishi Heavy Ind Ltd | Turbine moving blade |
| CN101117896A (en) * | 2006-07-31 | 2008-02-06 | 通用电气公司 | Rotor blade and manufacturing method thereof |
| CN101988392A (en) * | 2009-07-31 | 2011-03-23 | 通用电气公司 | Rotor blades for turbine engines |
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| 关桥: "《关桥论著选编》", 31 December 2002 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925030A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Low-pressure turbine simulation blade with embedded blade shroud damping |
| CN110925030B (en) * | 2019-12-05 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Low-pressure turbine simulation blade with embedded blade shroud damping |
| CN112228161A (en) * | 2020-10-16 | 2021-01-15 | 中国航发沈阳发动机研究所 | Blade and turbine thereof |
| WO2024055509A1 (en) * | 2022-09-14 | 2024-03-21 | 哈电发电设备国家工程研究中心有限公司 | Insertion piece and method for repairing gap between shrouds of titanium alloy blades of steam turbine |
| CN115324657A (en) * | 2022-10-12 | 2022-11-11 | 中国航发四川燃气涡轮研究院 | Turbine working blade shroud cooling structure |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210621 Address after: Room 409, 4th floor, No.38 Yinglun Road, Pudong New Area pilot Free Trade Zone, Shanghai, 200120 Applicant after: SIEMENS ENERGY, Inc. Address before: 100102 No. 7 South Central Road, Chaoyang District, Beijing, China Applicant before: Siemens (China) Co.,Ltd. |