CN220748359U - Stator blade holding ring of steam turbine - Google Patents
Stator blade holding ring of steam turbine Download PDFInfo
- Publication number
- CN220748359U CN220748359U CN202321795155.XU CN202321795155U CN220748359U CN 220748359 U CN220748359 U CN 220748359U CN 202321795155 U CN202321795155 U CN 202321795155U CN 220748359 U CN220748359 U CN 220748359U
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- blade
- holding ring
- blade root
- stator
- root
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- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 8
- 230000003313 weakening effect Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a stator blade holding ring of a steam turbine, wherein a first blade root of a first guiding stator blade, a middle blade root of a plurality of middle guiding stator blades and a last blade root of a last guiding stator blade are respectively and closely contacted in a blade root mounting groove in each half holding ring body. The first blade root arranged in the first half-holding ring body is tightly contacted with the last blade root arranged in the second half-holding ring body, and the contact surface is positioned on the bisector surface; the first blade root arranged in the second half-holding ring body is tightly contacted with the last blade root arranged in the first half-holding ring body, and the contact surface is positioned on the bisector surface. The utility model provides a novel stator blade design installed on a middle split surface, which realizes the superposition of the plane of the stator blade after installation and the horizontal middle split surface by utilizing the different shapes of the head blade root and the tail blade root, reduces the efficiency loss caused by the stator blade, reduces the strength weakening of a through-flow stator part, reduces the installation difficulty, improves the running efficiency of a unit and reduces the cost.
Description
Technical Field
The utility model belongs to the technical field of turbines, relates to stationary blades, and in particular relates to a stationary blade holding ring of a turbine.
Background
The industrial steam turbine is a power machine which uses steam as working medium and converts steam energy into rotor rotary mechanical energy, and has the advantages of high single machine power, high efficiency, high rotating speed, convenient speed regulation, long service life, safe and reliable operation and the like, thus being widely applied to petrochemical industry.
The stator blade is a stationary blade mounted on the baffle guide vane carrier ring, cylinder and other parts. The stator blades not only guide the steam flow outwards in the turbine, but also accelerate the steam.
The stator blades in the rotary drum section and the low pressure section are called guide blades, the structures of the stator blades in the rotary drum section and the low pressure section are similar, but the sizes are different, when the cylinder can be opened again by using the guide blade holding ring for the stator blade of the reaction stage in the guide blade holding ring, the stator blade can be replaced without turning over the upper cylinder, therefore, the stator blade arranged on the middle division surface of the guide blade holding ring needs to be disconnected at the middle division surface, the strength of the stator blade is reduced while the efficiency is influenced,
the current guide vane supporting ring design generally adopts a horizontal split structure, namely an upper half supporting ring and a lower half supporting ring, and the upper half supporting ring and the lower half supporting ring are connected together by flange bolts. The holding ring is made into an upper half and a lower half, which is convenient for processing and manufacturing, installation and maintenance. Because the stator blades are arranged in the guide blade supporting ring, the same stator blade needs to be cut in the upper half and the lower half, so that not only can the stator blade flow channel of the turbine be unsmooth, but also the strength of the stator blade is greatly weakened.
The defects existing in the prior art mainly comprise: the flow channel is not smooth enough after the static blades are installed; the strength of the static blade cannot be accurately calculated after being cut; the installation is complicated; the operation efficiency of the unit is affected.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a stator blade holding ring of a steam turbine, which solves the technical problem that the performance of stator blades holding the ring in the prior art needs to be further improved.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a steam turbine stator blade holds ring, includes two halves and holds the ring body, and two halves hold the ring body concatenation and form a complete ring body that holds together, two halves hold the concatenation face of ring body and hold the face for holding the ring body, hold the ring body in offer the blade root mounting groove along circumference.
The blade root mounting grooves in each semi-holding ring body are respectively closely contacted with the first blade root of one first guiding stator blade, the middle blade roots of a plurality of middle guiding stator blades and the last blade root of one last guiding stator blade.
The first blade root arranged in the first half-holding ring body is tightly contacted with the last blade root arranged in the second half-holding ring body, and the contact surface is positioned on the bisector surface; the first blade root arranged in the second half-holding ring body is tightly contacted with the last blade root arranged in the first half-holding ring body, and the contact surface is positioned on the bisector surface.
The utility model also has the following technical characteristics:
one blade root mounting groove corresponds to one blade top shroud; the blade top surrounding belt is provided with a plurality of rivet joint mounting holes, and a head blade top rivet joint of a head guiding static blade, a middle blade top rivet joint of a middle guiding static blade and a tail blade top rivet joint of a tail guiding static blade are mounted in the rivet joint mounting holes.
The head guiding static blade comprises a head blade root, a head blade body is arranged on the head blade root, and a head blade top rivet joint is arranged on the blade top of the head blade body.
The middle guide stator blade comprises a middle blade root, a middle blade body is arranged on the middle blade root, and a middle blade top rivet joint is arranged on the blade top of the middle blade body.
The tail guide static blade comprises a tail blade root, a tail blade body is arranged on the tail blade root, and a tail blade top rivet joint is arranged on the blade top of the tail blade body.
And a spacer strip mounting groove is also formed in the blade root mounting groove along the circumferential direction.
The number of the blade root mounting grooves is more than one.
Compared with the prior art, the utility model has the following technical effects:
the utility model provides a novel stator blade design installed on a middle split surface, and the design of the stator blade design is characterized in that the plane of the stator blade after installation is overlapped with the horizontal middle split surface by utilizing the difference of the shapes of the head and tail blade roots, so that the efficiency loss caused by the stator blade is reduced, the strength weakening of a through-flow stator component is reduced, the installation difficulty is reduced, the unit operation efficiency is improved, and the cost is reduced.
And (II) the first guide stator blade and the last guide stator blade are designed on the basis of the original stator blade, so that the flow passage is smooth and the strength of the stator blade is enhanced.
(III) the utility model provides an innovative guide vane mounting mode; the brand new end-to-end guide vane structure design can reduce the incomplete flow channel caused by the original guide vane segmentation and improve the efficiency of the unit.
Drawings
FIG. 1 is a schematic illustration of the assembly relationship within a half-grip ring of a turbine vane-grip ring.
FIG. 2 is a schematic view of a partial structure of a tip shroud.
Fig. 3 is a schematic view of a structure of a leading stationary blade.
Fig. 4 is a schematic structural view of an intermediate guide vane.
Fig. 5 is a schematic structural view of a non-guide vane.
The meaning of each reference numeral in the figures is: the device comprises a 1-half-holding ring body, a 2-holding ring body, a 3-first guide stator blade, a 4-middle guide stator blade, a 5-last guide stator blade, a 6-blade top shroud, a 7-rivet joint mounting hole, an 8-bisection surface, a 9-blade root mounting groove and a 10-spacer strip mounting groove.
301-head blade root, 302-head blade body and 303-head blade top rivet joint.
401-middle blade root, 402-middle blade body, 403-middle blade top rivet joint.
501-end blade root, 502-end blade body and 503-end blade top rivet joint.
The following examples illustrate the utility model in further detail.
Detailed Description
All the components in the present utility model are known in the art unless otherwise specified.
The following specific embodiments of the present utility model are provided, and it should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present utility model.
Examples:
the embodiment provides a stator blade holding ring of a steam turbine, as shown in fig. 1, comprising two half holding ring bodies 1, wherein the two half holding ring bodies 1 are spliced together to form a complete holding ring body 2, the splicing surface of the two half holding ring bodies 1 is a bisection surface 8 of the holding ring body, and blade root mounting grooves 9 are formed in the holding ring body 2 along the circumferential direction; the first blade root 301 of one first guide stator blade 3, the intermediate blade roots 401 of a plurality of intermediate guide stator blades 4 and the last blade root 501 of one last guide stator blade 5 are respectively and closely contacted in the blade root mounting groove 9 in each half-holding ring body 1.
The first blade root 301 installed in the first half-holding ring body 1 is tightly contacted with the last blade root 501 installed in the second half-holding ring body 1, and the contact surface is positioned on the bisector 8; the first blade root 301 mounted in the second half-holding ring body 1 is in close contact with the last blade root 501 mounted in the first half-holding ring body 1, and the contact surface is located on the bisecting plane 8.
Further, as shown in FIG. 2, a blade root mounting slot 9 corresponds to a blade tip shroud 6; the shroud 6 is provided with a plurality of rivet joint mounting holes 7, and a head rivet joint 303 of the head guide stator blade 3, a middle head rivet joint 403 of the middle guide stator blade 4, and a tail head rivet joint 503 of the tail guide stator blade 5 are mounted in the rivet joint mounting holes 7. The tip shroud 6 may be any tip shroud commonly used in the art.
Specifically, as shown in fig. 3, the first guide vane 3 includes a first blade root 301, a first blade root 301 is provided with a first blade body 302, and a first blade tip rivet 303 is provided at a tip of the first blade body 302.
Specifically, as shown in fig. 4, the intermediate guide vane 4 includes an intermediate blade root 401, an intermediate blade body 402 is provided on the intermediate blade root 401, and an intermediate blade tip rivet 403 is provided on a tip of the intermediate blade body 402.
Specifically, as shown in fig. 5, the last guide vane 5 includes a last blade root 501, a last blade body 502 is provided on the last blade root 501, and a last blade tip rivet 503 is provided on a tip of the last blade body 502.
As a preferable aspect of the present embodiment, a spacer mounting groove 10 is also provided in the blade root mounting groove 9 along the circumferential direction. The spacer mounting groove 10 is used for mounting a spacer, and the spacer can fill a mounting gap between the blade root and the blade root mounting groove 9.
As a preferable mode of this embodiment, the blade root mounting groove 9 is one or more. The blade root mounting slot 9 is defined in terms of the number of stages of the turbine. In this embodiment, two first blade roots 301 and two last blade roots 501 are installed in one blade root installation groove 9 of the complete ring body 2, and the first blade roots 301 and the last blade roots 501 form a pair of contact installation.
The stator blade of the utility model belongs to a guide blade and belongs to a reaction-stage stator blade in a guide blade supporting ring.
In the present embodiment, the specific number of the intermediate guide stator blades 4 is determined according to the design requirement of the turbine stator blade carrier ring. For example, a conventional number of turbine vane carriers.
In this embodiment, the specific structures of the first blade 302, the middle blade 402, and the last blade 502 are determined according to the design requirements of the turbine stator blade carrier. For example, a conventional blade body structure of a turbine stator blade retaining ring is adopted.
In the present utility model, the number of the stator blades in the partial stage is large due to the structural limitation. The pitch is small, and when the middle split surface is fixed on the head and tail blades by using the joint screws, the structural strength of the stator blade is enhanced, and the specific assembly difficulty is reduced.
Claims (7)
1. The stator blade holding ring of the steam turbine comprises two half holding ring bodies (1), wherein the two half holding ring bodies (1) are spliced together to form a complete holding ring body (2), the splicing surface of the two half holding ring bodies (1) is a middle split surface (8) of the holding ring body, and blade root mounting grooves (9) are formed in the holding ring body (2) along the circumferential direction; the blade root fixing device is characterized in that a first blade root (301) of a first guiding stator blade (3), intermediate blade roots (401) of a plurality of intermediate guiding stator blades (4) and a last blade root (501) of a last guiding stator blade (5) are respectively and closely contacted in blade root fixing grooves (9) in each semi-holding ring body (1);
a first blade root (301) arranged in the first half-holding ring body (1) is tightly contacted with a last blade root (501) arranged in the second half-holding ring body (1), and the contact surface is positioned on the bisector surface (8); the head blade root (301) arranged in the second half-holding ring body (1) is tightly contacted with the tail blade root (501) arranged in the first half-holding ring body (1), and the contact surface is positioned on the bisector surface (8).
2. The turbine vane support ring of claim 1, wherein one blade root mounting slot (9) corresponds to one blade tip shroud (6); the blade top shroud (6) is provided with a plurality of rivet joint mounting holes (7), and a head blade top rivet joint (303) of the head guide stator blade (3), a middle blade top rivet joint (403) of the middle guide stator blade (4) and a tail blade top rivet joint (503) of the tail guide stator blade (5) are mounted in the rivet joint mounting holes (7).
3. The turbine stator blade carrier ring of claim 1, wherein the first guiding stator blade (3) comprises a first blade root (301), a first blade body (302) is arranged on the first blade root (301), and a first blade top rivet joint (303) is arranged on the blade top of the first blade body (302).
4. The turbine vane carrier ring of claim 1, wherein the intermediate guide vane (4) comprises an intermediate vane root (401), an intermediate vane body (402) is provided on the intermediate vane root (401), and an intermediate vane tip rivet joint (403) is provided on a vane tip of the intermediate vane body (402).
5. The turbine stator blade carrier ring of claim 1, wherein the last guiding stator blade (5) comprises a last blade root (501), a last blade body (502) is arranged on the last blade root (501), and a last blade top rivet joint (503) is arranged at a blade top of the last blade body (502).
6. The turbine stator blade carrier ring of claim 1, wherein the blade root mounting groove (9) is further provided with a spacer mounting groove (10) along the circumferential direction.
7. The turbine vane support ring of claim 2, wherein said blade root mounting slots (9) are one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321795155.XU CN220748359U (en) | 2023-07-10 | 2023-07-10 | Stator blade holding ring of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321795155.XU CN220748359U (en) | 2023-07-10 | 2023-07-10 | Stator blade holding ring of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220748359U true CN220748359U (en) | 2024-04-09 |
Family
ID=90552867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321795155.XU Active CN220748359U (en) | 2023-07-10 | 2023-07-10 | Stator blade holding ring of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220748359U (en) |
-
2023
- 2023-07-10 CN CN202321795155.XU patent/CN220748359U/en active Active
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