CN217270344U - Moving blade shroud for regulating stage of industrial steam turbine - Google Patents
Moving blade shroud for regulating stage of industrial steam turbine Download PDFInfo
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- CN217270344U CN217270344U CN202220944902.0U CN202220944902U CN217270344U CN 217270344 U CN217270344 U CN 217270344U CN 202220944902 U CN202220944902 U CN 202220944902U CN 217270344 U CN217270344 U CN 217270344U
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- strip
- shim
- filler strip
- steam turbine
- moving blade
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Abstract
The embodiment of the utility model provides an industrial steam turbine regulation level moving blade shroud, include: 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 on the shroud ring in a surrounding mode, 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.
Description
Technical Field
The utility model relates to an industrial steam turbine technical field especially relates to an industrial steam turbine adjusts level moving blade shroud.
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 art, 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.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem, proposed following technical scheme:
in a first aspect, an embodiment of the present invention provides an industrial steam turbine regulation stage moving blade shroud, include: 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 adjusting-stage blade is improved.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the shim bar set includes a first shim bar set and a second shim bar set, the first shim bar set includes a first shim bar and a fourth shim bar that are disposed in parallel in the dovetail groove, the second shim bar set includes a second shim bar and a third shim bar that are disposed in parallel in the dovetail groove, the first shim bar and the third shim bar have a first length, the second shim bar and the fourth shim bar have a second length, the first length is greater than the second length, and the first shim bar, the second shim bar, the third shim bar, and the fourth shim bar 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, so that the stability of the 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 tightening strip and a second tightening strip that are disposed on two sides in the locking opening, a third tightening strip is disposed between the first tightening strip and the second tightening strip, and lengths of the first tightening strip, the second tightening strip, and the third tightening strip are third lengths.
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, they are placed by the position of the caulking strip, and if the third length is less than the second length, they 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 caulking strip and the second caulking strip is attached to the dovetail groove, the other side of each of the first caulking strip and the second caulking strip is vertical, and the height of each of the first caulking strip and the second caulking 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 plugging strip is square, the height of the third plugging strip is smaller than the depth of the dovetail groove, and the top of the third plugging 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 strip 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 invention provides an industrial steam turbine regulation stage moving blade shroud optimization method, for the industrial steam turbine regulation stage moving blade shroud described in any possible implementation manner of the first aspect and the first aspect, 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 invention as claimed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, 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 these drawings without any creative effort.
FIG. 1 is an expanded schematic view of a moving blade shroud for a regulation stage of an industrial steam turbine according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic view of an optimized process for a moving blade shroud of a regulation stage of an industrial steam turbine according to an embodiment of the present invention;
in fig. 1-4, 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
The embodiment of the utility model provides a for the expansion schematic diagram of industrial steam turbine regulation level moving blade shroud is provided with reference to fig. 1, see fig. 1, the utility model provides an industrial steam turbine regulation level moving blade shroud 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 this 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 stopper strips 6, 7 is less than the width of the third stopper strip 8. The first tightening strip 6 and the second tightening strip 7 can be normally placed in the locking notch.
The utility model provides an industrial steam turbine regulation level moving blade shroud is corresponding with above-mentioned embodiment, the utility model also provides an embodiment of an industrial steam turbine regulation level moving blade shroud optimization method.
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 position of a lock opening, and installing a first filler strip 2 and a third filler strip 4 on the edge of the lock opening;
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, respectively placing a first tightening strip 6 and a second tightening strip 7 on two sides of the locking opening, then placing a third tightening strip 8 between the first tightening strip 6 and the second tightening strip 7 to tightly push against, and performing filler welding 9 on the top end of the third tightening strip 8 to realize locking of a whole ring.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention 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 invention 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 invention 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 invention is limited only by the appended claims.
Claims (9)
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 stock comprises a first shim stock and a second shim stock, the first shim stock comprising a first shim bar and a fourth shim bar disposed in parallel in the dovetail slot, the second shim stock comprising 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 being of a first length, the second shim bar and the fourth shim bar being of 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, each being half the dovetail slot cross-section.
3. The industrial steam turbine regulation stage moving blade shroud of claim 2 wherein a first end of the second shim bar is in close abutment with the first end of the shim bar locking means, a second end of the second shim bar is in close abutment with a first end of the third shim bar, and a second end of the third shim bar is in close abutment with the second end of the shim bar locking means; 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.
4. The industrial steam turbine regulating stage moving blade shroud according to any one of claims 1 to 3, wherein the filler strip locking device comprises a first filler strip and a second filler strip which are arranged on both sides in the locking opening, a third filler strip is arranged between the first filler strip and the second filler strip, and the lengths of the first filler strip, the second filler strip and the third filler strip are 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220944902.0U CN217270344U (en) | 2022-04-22 | 2022-04-22 | Moving blade shroud for regulating stage of industrial steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220944902.0U CN217270344U (en) | 2022-04-22 | 2022-04-22 | Moving blade shroud for regulating stage of industrial steam turbine |
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| Publication Number | Publication Date |
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| CN217270344U true CN217270344U (en) | 2022-08-23 |
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| CN202220944902.0U Active CN217270344U (en) | 2022-04-22 | 2022-04-22 | Moving blade shroud for regulating stage of industrial steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922695A (en) * | 2022-04-22 | 2022-08-19 | 沈阳德瓦特汽轮动力有限责任公司 | Moving blade shroud for adjusting stage of industrial steam turbine and optimization method thereof |
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2022
- 2022-04-22 CN CN202220944902.0U patent/CN217270344U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922695A (en) * | 2022-04-22 | 2022-08-19 | 沈阳德瓦特汽轮动力有限责任公司 | Moving blade shroud for adjusting stage of industrial steam turbine and optimization method thereof |
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