CN107717328B - Steam turbine partition plate assembling process - Google Patents
Steam turbine partition plate assembling process Download PDFInfo
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- CN107717328B CN107717328B CN201711080596.0A CN201711080596A CN107717328B CN 107717328 B CN107717328 B CN 107717328B CN 201711080596 A CN201711080596 A CN 201711080596A CN 107717328 B CN107717328 B CN 107717328B
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- assembly
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- outer ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
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- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a steam turbine partition plate assembly process, wherein the steam turbine partition plate mainly comprises a partition plate body, a plurality of guide blades and a partition plate outer ring, and the guide blades mainly comprise inner edge plates, blade bodies and outer edge plates; the partition plate assembling process comprises the following technical measures: -machining a flat, non-welded groove structure of the edge plate assembly face of each guide vane; sequentially brushing the inner edge plates of the guide vanes on the periphery of the partition body, so that the guide vanes form a blade cascade on the periphery of the partition body, and the partition body and the blade cascade form a brushing assembly; -brushing the diaphragm outer ring with a brushing assembly; -fitting a fitted diaphragm outer ring onto the fitting assembly in a shrink fit, said diaphragm outer ring being at the outer edge plate of the cascade of the fitting assembly, to obtain the turbine diaphragm. The invention has the characteristics of small difficulty of assembly technology, short assembly period, high assembly efficiency, low manufacturing cost, high assembly precision and the like.
Description
Technical Field
The invention relates to a steam turbine partition plate forming technology, in particular to an assembling process of a steam turbine partition plate.
Background
The steam turbine diaphragm is a separating dividing wall of each stage in the steam turbine and mainly comprises a diaphragm body, a plurality of guide blades (namely static blades) and a diaphragm outer ring, wherein inner edge plates and outer edge plates are arranged at two ends of blade bodies of the guide blades, namely the guide blades are of self-contained crown structures.
The assembly of the steam turbine diaphragm is to combine the diaphragm body, a plurality of guide vanes and the diaphragm outer ring to form a whole.
Referring to fig. 1 and 2, in the conventional turbine diaphragm assembling process, a welding groove structure is machined on an edge plate assembling surface of each guide vane 2, and the welding groove structure is located at a matched seam of the guide vane 2; then the baffle plate body 1, a plurality of guide vanes 2 and the baffle plate outer ring 3 are integrated according to the following process flow: the method comprises the following steps of guide vane fitting, guide vane tack welding, robot welding of a blade grid, blade grid heat treatment, blade grid machining, blade grid shrink sleeve, partition plate outer ring shrink sleeve, main weld seam tack welding, cover plate welding, main weld seam welding, partition plate integral heat treatment, split surfacing welding, partition plate integral heat treatment and scribing, and the steam turbine partition plate is obtained. The assembling process clearly shows that the assembling process of the existing steam turbine partition plate not only needs to provide welding grooves on the assembling surfaces of all the guide vanes, but also has various whole assembling procedures, and the technical measures directly result in that the assembling period of the steam turbine partition plate is greatly prolonged, the manufacturing efficiency is low, and further the manufacturing cost of the steam turbine partition plate is greatly increased. In addition, the existing assembly process of the steam turbine partition plate has a welding treatment process of a blade cascade formed by a plurality of guide blades, and the welding process of the blade cascade easily causes the whole blade cascade to generate large deformation due to welding, so that the assembly size of the blade cascade is difficult to guarantee, and the assembly precision and the forming quality of the partition plate can be directly influenced.
In conclusion, the existing assembly process of the steam turbine partition plate has the technical problems of long period, low efficiency, high cost, unstable forming quality and the like.
Disclosure of Invention
The technical purpose of the invention is as follows: aiming at the defects of the prior art, the steam turbine partition plate assembling process which is short in period, high in efficiency, low in cost and beneficial to improving the forming quality is provided.
The technical scheme adopted by the invention for realizing the technical purpose is that the steam turbine partition plate assembly process mainly comprises a partition plate body, a plurality of guide blades and a partition plate outer ring, wherein the guide blades mainly comprise an inner edge plate, a blade body and an outer edge plate; the partition plate assembling process comprises the following technical measures:
-machining a flat, non-welded groove structure of the edge plate assembly face of each guide vane;
sequentially brushing the inner edge plates of the guide vanes on the periphery of the partition body, so that the guide vanes form a blade cascade on the periphery of the partition body, and the partition body and the blade cascade form a brushing assembly;
-brushing the diaphragm outer ring with a brushing assembly;
-fitting a fitted diaphragm outer ring onto the fitting assembly in a shrink fit, said diaphragm outer ring being at the outer edge plate of the cascade of the fitting assembly, to obtain the turbine diaphragm.
Preferably, the outer periphery of the partition body has a raised positioning spigot, and the inner edge plate of the guide vane is brushed on the outer periphery of the partition body based on the raised positioning spigot on the outer periphery of the partition body.
As one preferable scheme, the interference magnitude of the shrink fit assembly is 0-0.10 mm.
As one of the preferable schemes, the temperature of the red jacket for red jacket assembly is 150-250 ℃, and the heat preservation time is 3 h.
The beneficial technical effects of the invention are as follows:
1. according to the invention, a welding groove structure is not required to be arranged on the edge plate assembling surface of each guide blade, welding treatment is not required, and the assembling technology is low in difficulty, so that the whole assembling period is greatly shortened, the assembling efficiency is greatly improved, and the manufacturing cost is greatly reduced; in addition, the assembly process basically has no problem of blade cascade deformation, and the assembly size is easy to ensure, so that the assembly precision is reliably ensured, and the forming quality is high;
2. the invention has the advantages that the brushing matching of the guide vanes on the clapboard body is reliable and accurate; in addition, the red sleeve assembling mode can ensure that the assembling precision is reliably ensured, and the assembling and forming quality can be further improved.
Drawings
FIG. 1 is a schematic diagram of the structure of a diaphragm obtained by a conventional turbine diaphragm assembly process.
FIG. 2 is a schematic view of the configuration of the brushing surface on the vane platform of FIG. 1.
FIG. 3 is a schematic view of the structure of the separator body of the present invention.
The reference numbers in the figures mean: 1-a separator plate body; 2-guide vanes; 3-outer ring of baffle plate; 4, positioning a spigot; 5-fitting a datum plane.
Detailed Description
The invention relates to a steam turbine diaphragm forming technology, in particular to an assembling process of a steam turbine diaphragm, and the technical content of the invention is clearly and specifically explained in detail by using a plurality of embodiments.
Example 1
The invention relates to an assembly process of a steam turbine partition plate, wherein the steam turbine partition plate mainly comprises a partition plate body, a plurality of guide vanes and a partition plate outer ring, wherein the periphery of the partition plate body is provided with a raised positioning spigot (as shown in figure 3, 1 is the partition plate body, 4 is the positioning spigot, and 5 is a matched reference surface), and each guide vane mainly comprises an inner edge plate, a vane body and an outer edge plate; the assembly process comprises the following technical measures:
-machining a flat, non-welded groove structure of the edge plate assembly face of each guide vane;
sequentially brushing the inner edge plates of the guide vanes on the periphery of the partition body, specifically, brushing the inner edge plates of the guide vanes on the periphery of the partition body by taking the top surfaces of the positioning spigots protruding from the periphery of the partition body as a reference, namely a brushing reference surface, and controlling the brushing gaps, the axial dislocation and the radial dislocation between the guide vanes and the assembly gaps between the guide vanes and the partition body in the brushing process; therefore, each guide vane forms an accurate and corresponding blade grid on the periphery of the partition plate body, and the partition plate body and the blade grids form a brush assembly;
-brushing the diaphragm outer ring with a brushing assembly;
assembling the brushed partition plate outer ring on the brushing assembly body in a shrink fit assembly mode, wherein the shrink fit assembly technology is required to control the interference amount to be 0.010mm, the shrink fit temperature to be 250 ℃ and the heat preservation time to be 3 hours; thereby the outer ring of the clapboard is positioned at the outer edge plate of the blade cascade of the brush-fitting assembly, and the steam turbine clapboard is obtained.
Example 2
The invention relates to an assembly process of a steam turbine partition plate, wherein the steam turbine partition plate mainly comprises a partition plate body, a plurality of guide vanes and a partition plate outer ring, wherein the periphery of the partition plate body is provided with a raised positioning spigot (as shown in figure 3, 1 is the partition plate body, 4 is the positioning spigot, and 5 is a matched reference surface), and each guide vane mainly comprises an inner edge plate, a vane body and an outer edge plate; the assembly process comprises the following technical measures:
-machining a flat, non-welded groove structure of the edge plate assembly face of each guide vane;
sequentially brushing the inner edge plates of the guide vanes on the periphery of the partition body, specifically, brushing the inner edge plates of the guide vanes on the periphery of the partition body by taking the top surfaces of the positioning spigots protruding from the periphery of the partition body as a reference, namely a brushing reference surface, and controlling the brushing gaps, the axial dislocation and the radial dislocation between the guide vanes and the assembly gaps between the guide vanes and the partition body in the brushing process; therefore, each guide vane forms an accurate and corresponding blade grid on the periphery of the partition plate body, and the partition plate body and the blade grids form a brush assembly;
-brushing the diaphragm outer ring with a brushing assembly;
assembling the brushed partition plate outer ring on the brushing assembly body in a shrink fit assembly mode, wherein the shrink fit assembly technology is required to control the interference amount to be 0.050mm, the shrink fit temperature to be 180 ℃ and the heat preservation time to be 3 h; thereby the outer ring of the clapboard is positioned at the outer edge plate of the blade cascade of the brush-fitting assembly, and the steam turbine clapboard is obtained.
Example 3
The invention relates to an assembly process of a steam turbine partition plate, wherein the steam turbine partition plate mainly comprises a partition plate body, a plurality of guide vanes and a partition plate outer ring, wherein the periphery of the partition plate body is provided with a raised positioning spigot (as shown in figure 3, 1 is the partition plate body, 4 is the positioning spigot, and 5 is a matched reference surface), and each guide vane mainly comprises an inner edge plate, a vane body and an outer edge plate; the assembly process comprises the following technical measures:
-machining a flat, non-welded groove structure of the edge plate assembly face of each guide vane;
sequentially brushing the inner edge plates of the guide vanes on the periphery of the partition body, specifically, brushing the inner edge plates of the guide vanes on the periphery of the partition body by taking the top surfaces of the positioning spigots protruding from the periphery of the partition body as a reference, namely a brushing reference surface, and controlling the brushing gaps, the axial dislocation and the radial dislocation between the guide vanes and the assembly gaps between the guide vanes and the partition body in the brushing process; therefore, each guide vane forms an accurate and corresponding blade grid on the periphery of the partition plate body, and the partition plate body and the blade grids form a brush assembly;
-brushing the diaphragm outer ring with a brushing assembly;
assembling the brushed partition plate outer ring on the brushing assembly body in a shrink fit assembly mode, wherein the shrink fit assembly technology is required to control the interference amount to be 0.10mm, the shrink fit temperature to be 150 ℃ and the heat preservation time to be 3 h; thereby the outer ring of the clapboard is positioned at the outer edge plate of the blade cascade of the brush-fitting assembly, and the steam turbine clapboard is obtained.
Example 4
The invention relates to an assembly process of a steam turbine partition plate, wherein the steam turbine partition plate mainly comprises a partition plate body, a plurality of guide vanes and a partition plate outer ring, wherein the periphery of the partition plate body is provided with a raised positioning spigot (as shown in figure 3, 1 is the partition plate body, 4 is the positioning spigot, and 5 is a matched reference surface), and each guide vane mainly comprises an inner edge plate, a vane body and an outer edge plate; the assembly process comprises the following technical measures:
-machining a flat, non-welded groove structure of the edge plate assembly face of each guide vane;
sequentially brushing the inner edge plates of the guide vanes on the periphery of the partition body, specifically, brushing the inner edge plates of the guide vanes on the periphery of the partition body by taking the top surfaces of the positioning spigots protruding from the periphery of the partition body as a reference, namely a brushing reference surface, and controlling the brushing gaps, the axial dislocation and the radial dislocation between the guide vanes and the assembly gaps between the guide vanes and the partition body in the brushing process; therefore, each guide vane forms an accurate and corresponding blade grid on the periphery of the partition plate body, and the partition plate body and the blade grids form a brush assembly;
-brushing the diaphragm outer ring with a brushing assembly;
assembling the brushed partition plate outer ring on the brushing assembly body in a shrink fit assembly mode, wherein the shrink fit assembly technology is required to control the interference amount to be 0.030mm, the shrink fit temperature to be 220 ℃ and the heat preservation time to be 3 h; thereby the outer ring of the clapboard is positioned at the outer edge plate of the blade cascade of the brush-fitting assembly, and the steam turbine clapboard is obtained.
The above examples are intended to illustrate the invention, but not to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the specific technical solutions in the above embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the present invention in its essence.
Claims (3)
1. A steam turbine partition plate assembly process is characterized in that the steam turbine partition plate mainly comprises a partition plate body, a plurality of guide blades and a partition plate outer ring, wherein the guide blades mainly comprise inner edge plates, blade bodies and outer edge plates; the partition plate assembling process is characterized by comprising the following technical measures:
-machining a flat, non-welded groove structure of the edge plate assembly face of each guide vane; the periphery of the clapboard body is provided with a raised positioning spigot;
sequentially fitting the inner edge plates of the guide vanes on the periphery of the partition body by taking the positioning spigots protruding from the periphery of the partition body as reference, so that the guide vanes form a vane cascade on the periphery of the partition body, and the partition body and the vane cascade form a fitting assembly;
-brushing the diaphragm outer ring with a brushing assembly;
-fitting a fitted diaphragm outer ring onto the fitting assembly in a shrink fit, said diaphragm outer ring being at the outer edge plate of the cascade of the fitting assembly, to obtain the turbine diaphragm.
2. The steam turbine diaphragm assembling process according to claim 1, wherein the interference magnitude of the shrink fit is 0-0.10 mm.
3. The steam turbine diaphragm assembling process according to claim 1 or 2, wherein the temperature of the shrink fit assembly is 150-250 ℃, and the heat preservation time is 3 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711080596.0A CN107717328B (en) | 2017-11-06 | 2017-11-06 | Steam turbine partition plate assembling process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711080596.0A CN107717328B (en) | 2017-11-06 | 2017-11-06 | Steam turbine partition plate assembling process |
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| CN107717328A CN107717328A (en) | 2018-02-23 |
| CN107717328B true CN107717328B (en) | 2020-03-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108818368B (en) * | 2018-06-20 | 2021-01-15 | 哈尔滨汽轮机厂有限责任公司 | Assembling clamp and assembling method for slot type partition plate |
| CN111230414A (en) * | 2020-01-15 | 2020-06-05 | 哈尔滨汽轮机厂有限责任公司 | Method for assembling turbine partition plate cascade with forward and reverse integrated structure |
| CN111558806A (en) * | 2020-04-20 | 2020-08-21 | 哈尔滨汽轮机厂有限责任公司 | Hook type guide blade and rail type guide blade fitting and detecting method |
| CN112475855B (en) * | 2020-10-27 | 2021-09-17 | 浙江基力思汽车空调有限公司 | Automatic embedding device for spacer plug of liquid collecting pipe of condenser |
| CN113385885B (en) * | 2021-05-20 | 2022-04-12 | 中国电子科技集团公司第十四研究所 | Device for intelligently monitoring interference assembly of rotary table in real time and assembly method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835204A (en) * | 1981-08-28 | 1983-03-01 | Hitachi Ltd | Diaphragm for steam turbine |
| JP4040922B2 (en) * | 2001-07-19 | 2008-01-30 | 株式会社東芝 | Assembly type nozzle diaphragm and its assembly method |
| GB0700633D0 (en) * | 2007-01-12 | 2007-02-21 | Alstom Technology Ltd | Turbomachine |
| JP5342579B2 (en) * | 2011-02-28 | 2013-11-13 | 三菱重工業株式会社 | Stator blade unit of rotating machine, method of manufacturing stator blade unit of rotating machine, and method of coupling stator blade unit of rotating machine |
| US9127559B2 (en) * | 2011-05-05 | 2015-09-08 | Alstom Technology Ltd. | Diaphragm for turbomachines and method of manufacture |
| EP3074601B1 (en) * | 2013-11-25 | 2019-11-13 | Ansaldo Energia IP UK Limited | Guide vane assembly on the basis of a modular structure |
| US9611748B2 (en) * | 2013-12-06 | 2017-04-04 | Honeywell International Inc. | Stationary airfoils configured to form improved slip joints in bi-cast turbine engine components and the turbine engine components including the same |
| CN106103901B (en) * | 2013-12-20 | 2019-04-16 | 安萨尔多能源英国知识产权有限公司 | Rotor blade or guide vane assembly |
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