CN114922695A - Moving blade shroud for adjusting stage of industrial steam turbine and optimization method thereof - Google Patents
Moving blade shroud for adjusting stage of industrial steam turbine and optimization method thereof Download PDFInfo
- Publication number
- CN114922695A CN114922695A CN202210430124.8A CN202210430124A CN114922695A CN 114922695 A CN114922695 A CN 114922695A CN 202210430124 A CN202210430124 A CN 202210430124A CN 114922695 A CN114922695 A CN 114922695A
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- shim bar
- strip
- shim
- bar
- moving blade
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005457 optimization Methods 0.000 title abstract description 6
- 239000000945 filler Substances 0.000 claims abstract description 60
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims 5
- 238000013016 damping Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The embodiment of the application provides a moving blade shroud for an adjusting stage of an industrial steam turbine and an optimization method thereof, wherein the moving blade shroud comprises the following steps: the shroud band body encircles the shroud band and is provided with the dovetail, crisscross shimming strip group that is provided with in the dovetail, the fore shaft department of shimming strip group sets up shimming strip locking device. The dovetail groove is dug in a surrounding mode on the shroud band, the strength and the damping of the regulating-level moving blade are improved by placing the filler strip group, and the whole circle of the blade is connected into a whole by adopting the filler strip locking device. And the anti-vibration capability of the adjusting-stage blade is improved.
Description
Technical Field
The application relates to the technical field of industrial turbines, in particular to a moving blade shroud for an adjusting stage of an industrial turbine and an optimization method thereof.
Background
The industrial steam turbine is important equipment for function conversion and is widely applied to various fields of petroleum, chemical industry, metallurgy, energy, nuclear power, ships and warships and the like. The industrial steam turbine has a complex structure and high design and manufacture difficulty, and belongs to the high-end equipment manufacturing industry.
The first stage moving blade of industrial steam turbine after the steam is distributed by nozzle is called regulating stage blade. The working state of the regulating stage blade is generally high temperature and high pressure, and partial steam admission exists no matter under the design working condition or the non-design working condition. In the working state of the blade, various vibration modes of vibration are generated, and the blade is required to have anti-vibration capability.
In the conventional technology, in order to improve the anti-vibration capability of the regulation stage blades, an annular shroud is generally arranged to connect the regulation stage blades into a whole, so that the anti-vibration capability of the blades is improved. However, since the annular shroud is of a rigid structure, the anti-vibration capability of the regulation-stage blades is reduced under the action of more complex exciting force applied to the regulation-stage movable blades.
Disclosure of Invention
In order to solve the technical problems, the following technical scheme is provided:
in a first aspect, an embodiment of the present application provides a moving blade shroud for a regulation stage of an industrial steam turbine, including: the shroud band body encircles the shroud band and is provided with the dovetail, crisscross shimming strip group that is provided with in the dovetail, the fore shaft department of shimming strip group sets up shimming strip locking device.
By adopting the implementation mode, the dovetail groove is dug in a surrounding mode on the shroud ring, the strength and the damping of the adjusting-stage moving blade are improved by placing the filler strip group, and the whole ring of the blade is connected into a whole by adopting the filler strip locking device. And the anti-vibration capability of the regulating-stage blade is further improved.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the shim set includes a first shim set and a second shim set, the first shim set includes a first shim strip and a fourth shim strip disposed in parallel in the dovetail groove, the second shim set includes a second shim strip and a third shim strip disposed in parallel in the dovetail groove, the first shim strip and the third shim strip have a first length, the second shim strip and the fourth shim strip have a second length, the first length is greater than the second length, and the first shim strip, the second shim strip, the third shim strip, and the fourth shim strip have the same cross section, which is half of the cross section of the dovetail groove.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, a first end of the second filler strip is closely attached to a first end of the filler strip locking device, a second end of the second filler strip is closely attached to a first end of the third filler strip, and a second end of the third filler strip is closely attached to a second end of the filler strip locking device; the first end of the first filler strip is in close contact with the first end of the filler strip locking device, the second end of the first filler strip is in close contact with the first end of the fourth filler strip, and the second end of the fourth filler strip is in close contact with the second end of the filler strip locking device. The interstitial strips in the first interstitial strip group and the second interstitial strip group are assembled in a staggered mode, and therefore stability of interstitial is improved.
With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the gap strip locking device includes a first plugging strip and a second plugging strip that are disposed on two sides in the locking opening, a third plugging strip is disposed between the first plugging strip and the second plugging strip, and lengths of the first plugging strip, the second plugging strip, and the third plugging strip are a third length.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the third length is greater than the second length. Since the second filler strip and the fourth filler strip are installed after the first filler strip and the third filler strip, the filler strips are placed by the position of the plugging strip, and if the third length is less than the second length, the second filler strip and the fourth filler strip cannot be placed.
With reference to the third possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, one side of each of the first plugging strip and the second plugging strip is attached to the dovetail groove, the other side of each of the first plugging strip and the second plugging strip is vertical, and the height of each of the first plugging strip and the second plugging strip is the same as the depth of the dovetail groove. .
With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the cross section of the third caulking strip is square, the height of the third caulking strip is smaller than the depth of the dovetail groove, and the top of the third caulking strip is subjected to filling welding.
With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the height of the third plugging bar is 1/2 of the depth of the dovetail groove.
With reference to any one of the fourth to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, a width of the third caulking strip is greater than widths of the first caulking strip and the second caulking strip. The width of the first tightening strip and the second tightening strip is smaller than that of the third tightening strip. The first plugging strip and the second plugging strip can be normally placed into the lock opening.
In a second aspect, an embodiment of the present application provides an industrial steam turbine regulation stage moving blade shroud optimization method, which is used for the industrial steam turbine regulation stage moving blade shroud described in the first aspect and any one of the possible implementation manners of the first aspect, and the method includes: selecting a position of a lock opening, and installing a first filler strip and a third filler strip at the edge of the lock opening; mounting a second shim bar and a fourth shim bar adjacent the first shim bar and the third shim bar, respectively, such that the first shim bar and the second shim bar are edge aligned at the first end position of the keyhole and the third shim bar and the fourth shim bar are edge aligned at the second end position of the keyhole; first tight strip and the tight strip of second stopper are put into respectively to position both sides at the fore shaft, then are put into the tight strip of third stopper tightly between the tight strip of first stopper and the tight strip of second stopper and push up tightly, fill welding in the tight strip top of third stopper realizes whole circle locking.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a schematic view of a moving blade shroud of an industrial steam turbine regulation stage according to an embodiment of the present application;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic flow chart of an optimization process for a moving blade shroud of an adjustment stage of an industrial steam turbine according to an embodiment of the present application;
in fig. 1 to 4, the symbols are represented as:
1-dovetail groove, 2-first caulking strip, 3-second caulking strip, 4-third caulking strip, 5-fourth caulking strip, 6-first caulking strip, 7-second caulking strip, 8-third caulking strip, and 9-filler welding.
Detailed Description
Referring to fig. 1, a schematic developed view of a moving blade shroud of an adjustment stage of an industrial steam turbine according to an embodiment of the present application is shown, and referring to fig. 1, the moving blade shroud of the adjustment stage of the industrial steam turbine according to the embodiment of the present application includes: the shroud band body encircles the shroud band is provided with dovetail 1, crisscross shimming strip group that is provided with in dovetail 1, the fore shaft department of shimming strip group sets up shimming strip locking device.
The dovetail groove 1 is dug in a surrounding manner on the shroud ring, the strength and the damping of the adjusting-stage moving blade are improved by placing the filler strip group, and the whole circle of the blade is connected into a whole by adopting the filler strip locking device. And the anti-vibration capability of the regulating-stage blade is further improved.
In the present embodiment, the shim group includes a first shim bar group including a first shim bar 2 and a fourth shim bar 5 arranged in parallel in the dovetail groove 1, and a second shim bar group including a second shim bar 3 and a third shim bar 4 arranged in parallel in the dovetail groove 1, the first shim bar 2 and the third shim bar 4 having a first length, the second shim bar 3 and the fourth shim bar 5 having a second length, and the first length being greater than the second length. Referring to fig. 2, the first shim bar 2, the second shim bar 3, the third shim bar 4 and the fourth shim bar 5 have the same cross section, and are half of the cross section of the dovetail groove 1.
A first end of said second filler strip 3 is in close abutment with a first end of said filler strip locking means, a second end of said second filler strip 3 is in close abutment with a first end of said third filler strip 4, and a second end of said third filler strip 4 is in close abutment with a second end of said filler strip locking means; the first end of the first filler strip 2 is closely attached to the first end of the filler strip locking device, the second end of the first filler strip 2 is closely attached to the first end of the fourth filler strip 5, and the second end of the fourth filler strip 5 is closely attached to the second end of the filler strip locking device. The interstitial strips in the first interstitial strip group and the second interstitial strip group are assembled in a staggered mode, so that the stability of the interstitial is improved.
The clearance strip locking device is including setting up the first tight strip 6 of stopper and the tight strip 7 of second stopper of both sides in the lock opening, first tight strip 6 with be provided with third tight strip 8 of stopper between the tight strip 7 of second stopper, first tight strip 6 of stopper, second tight strip 7 of stopper and the tight strip 8 length of third stopper are the third length.
In this embodiment, the third length is greater than the second length. Since the second filler strip 3 and the fourth filler strip 5 are installed after the first filler strip 2 and the third filler strip 4, they are placed by the position of the caulking strip, and if the third length is smaller than the second length, the second filler strip 3 and the fourth filler strip 5 cannot be placed.
Referring to fig. 3, one side of each of the first tightening strip 6 and the second tightening strip 7 is attached to the dovetail groove 1, and the other side is vertical and has the same height as the depth of the dovetail groove 1. The cross section of the third tightening strip 8 is square, the height of the third tightening strip is smaller than the depth of the dovetail groove 1, and the top of the third tightening strip 8 is subjected to filling welding 9. Further, in the present embodiment, the height of the third caulking strip 8 is 1/2 of the depth of the dovetail groove 1, and the filler metal 9 occupies 1/2 of the depth of the dovetail groove 1.
In this embodiment, the width of the third tightening strip 8 is greater than the widths of the first tightening strip 6 and the second tightening strip 7. The width of the first and second tightening strips 6 and 7 is smaller than the width of the third tightening strip 8. The first tightening strip 6 and the second tightening strip 7 can be normally placed in the locking notch.
Corresponding to the regulating-stage moving blade shroud of the industrial steam turbine provided by the embodiment, the application also provides an embodiment of an optimizing method of the regulating-stage moving blade shroud of the industrial steam turbine.
Referring to fig. 4, the method for optimizing the moving blade shrouds of the regulation stages of the industrial steam turbine comprises the following steps:
s101, selecting a fore shaft position, and installing a first filler strip 2 and a third filler strip 4 on the edge of the fore shaft;
s102, respectively installing a second filler strip 3 and a fourth filler strip 5 beside the first filler strip 2 and the third filler strip 4, so that the first filler strip 2 and the second filler strip 3 are edge-aligned at the first end position of the locking notch, and the third filler strip 4 and the fourth filler strip 5 are edge-aligned at the second end position of the locking notch;
s103, a first tightening strip 6 and a second tightening strip 7 are placed in the two sides of the locking position respectively, then a third tightening strip 8 is placed between the first tightening strip 6 and the second tightening strip 7 to be tightly pushed, and the top end of the third tightening strip 8 is subjected to filling welding 9 to realize locking of a whole ring.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The present application is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A moving blade shroud for a regulation stage of an industrial steam turbine, comprising: the shroud band body encircles the shroud band and is provided with the dovetail, crisscross shimming strip group that is provided with in the dovetail, the fore shaft department of shimming strip group sets up shimming strip locking device.
2. The industrial steam turbine regulation stage moving blade shroud of claim 1 wherein the shim bar set includes a first shim bar set and a second shim bar set, the first shim bar set including a first shim bar and a fourth shim bar disposed in parallel in the dovetail slot, the second shim bar set including a second shim bar and a third shim bar disposed in parallel in the dovetail slot, the first shim bar and the third shim bar having a first length, the second shim bar and the fourth shim bar having a second length, the first length being greater than the second length, the first shim bar, the second shim bar, the third shim bar, and the fourth shim bar having the same cross-section that is half of the cross-section of the dovetail slot.
3. The industrial turbine regulator stage moving blade shroud of claim 2, wherein a first end of said second shim bar is in close abutment with a first end of said shim bar locking means, a second end of said second shim bar is in close abutment with a first end of said third shim bar, and a second end of said third shim bar is in close abutment with a second end of said shim bar locking means; the first end of the first shim bar is in intimate contact with the first end of the shim bar locking means, the second end of the first shim bar is in intimate contact with the first end of the fourth shim bar, and the second end of the fourth shim bar is in intimate contact with the second end of the shim bar locking means.
4. The industrial steam turbine regulating stage moving blade shroud according to claims 1-3, wherein the shim bar locking device comprises a first and a second shim bar disposed on either side within the lockhole, a third shim bar disposed between the first and the second shim bar, and the first, the second and the third shim bar are of a third length.
5. The industrial steam turbine regulation stage moving blade shroud of claim 4 wherein the third length is greater than the second length.
6. The industrial steam turbine regulation stage moving blade shroud of claim 4 wherein the first and second caulking strips are attached to the dovetail slot on one side and are vertical on the other side at the same height as the depth of the dovetail slot.
7. The industrial steam turbine regulation stage moving blade shroud of claim 6 wherein the third packing strip is square in cross-section and has a height less than the depth of the dovetail slot, and the top of the third packing strip is filler welded.
8. The industrial steam turbine regulation stage moving blade shroud of claim 7 wherein the third packing strip height is 1/2 of the dovetail depth.
9. The industrial steam turbine regulation stage moving blade shroud of any one of claims 5 to 8 wherein the third packing strip has a width greater than the widths of the first and second packing strips.
10. A method of optimizing a moving blade shroud of a regulator stage of an industrial steam turbine according to any one of claims 1 to 9, the method comprising:
selecting a locking notch position, and installing a first filler strip and a third filler strip at the edge of the locking notch;
mounting a second shim bar and a fourth shim bar adjacent the first shim bar and the third shim bar, respectively, such that the first shim bar and the second shim bar are edge aligned at the first end position of the keyhole and the third shim bar and the fourth shim bar are edge aligned at the second end position of the keyhole;
first tight strip and the tight strip of second stopper are put into respectively to position both sides at the fore shaft, then are put into the tight strip of third stopper tightly between the tight strip of first stopper and the tight strip of second stopper and push up tightly, fill welding in the tight strip top of third stopper realizes whole circle locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210430124.8A CN114922695A (en) | 2022-04-22 | 2022-04-22 | Moving blade shroud for adjusting stage of industrial steam turbine and optimization method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210430124.8A CN114922695A (en) | 2022-04-22 | 2022-04-22 | Moving blade shroud for adjusting stage of industrial steam turbine and optimization method thereof |
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| CN114922695A true CN114922695A (en) | 2022-08-19 |
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| CN202210430124.8A Pending CN114922695A (en) | 2022-04-22 | 2022-04-22 | Moving blade shroud for adjusting stage of industrial steam turbine and optimization method thereof |
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Citations (9)
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|---|---|---|---|---|
| EP1413712A1 (en) * | 2002-10-21 | 2004-04-28 | Siemens Aktiengesellschaft | Shrouded turbine blade with tip sealing |
| CN2916139Y (en) * | 2006-07-14 | 2007-06-27 | 哈尔滨汽轮机厂有限责任公司 | Dedicated twinborn governing-stage blade for steam turbine set of 50MW, 100MW, and 200MW |
| JP2007332893A (en) * | 2006-06-16 | 2007-12-27 | Mitsubishi Heavy Ind Ltd | Vibration damping and fretting preventive structure of axial flow turbine blade |
| EP2019188A1 (en) * | 2007-07-25 | 2009-01-28 | Siemens Aktiengesellschaft | Rotor stage with damping element |
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| CN108204248A (en) * | 2016-12-20 | 2018-06-26 | 上海汽轮机厂有限公司 | Steam turbine triplet governing-stage moving blade and installation method |
| CN109026172A (en) * | 2018-09-25 | 2018-12-18 | 中国船舶重工集团公司第七0三研究所 | A kind of band-like damp-ing wire vibration-proof structure of blade with tips |
| CN217270344U (en) * | 2022-04-22 | 2022-08-23 | 沈阳德瓦特汽轮动力有限责任公司 | Moving blade shroud for regulating stage of industrial steam turbine |
-
2022
- 2022-04-22 CN CN202210430124.8A patent/CN114922695A/en active Pending
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| EP1413712A1 (en) * | 2002-10-21 | 2004-04-28 | Siemens Aktiengesellschaft | Shrouded turbine blade with tip sealing |
| JP2007332893A (en) * | 2006-06-16 | 2007-12-27 | Mitsubishi Heavy Ind Ltd | Vibration damping and fretting preventive structure of axial flow turbine blade |
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