CN217976340U - Combined partition plate of industrial steam turbine - Google Patents
Combined partition plate of industrial steam turbine Download PDFInfo
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- CN217976340U CN217976340U CN202221849289.0U CN202221849289U CN217976340U CN 217976340 U CN217976340 U CN 217976340U CN 202221849289 U CN202221849289 U CN 202221849289U CN 217976340 U CN217976340 U CN 217976340U
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- outer ring
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- clapboard
- partition plate
- diaphragm
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Abstract
The utility model provides an industrial steam turbine's joint baffle, relates to industrial steam turbine technical field, has solved prior art baffle occupation space big and has leaded to the limited problem in later stage transformation space, includes: the outer ring of the first-stage clapboard, the outer ring of the second-stage clapboard, the fixed blade of the first-stage clapboard, the fixed blade of the second-stage clapboard, the inner ring of the first-stage clapboard and the inner ring of the second-stage clapboard, wherein the fixed blade of the first-stage clapboard is arranged at the lower part of the outer ring of the first-stage clapboard, the fixed blade of the second-stage clapboard is arranged at the lower part of the outer ring of the second-stage clapboard, the inner ring of the second-stage clapboard is arranged at the lower part of the fixed blade of the second-stage clapboard, the upper part of the outer ring of the first-stage clapboard is connected with the upper part of the outer ring of the second-stage clapboard, and the outer ring of the first-stage clapboard and the outer ring of the second-stage clapboard form a combined outer ring of the clapboard; the axial space of the combined clapboard is reduced by about 35 percent compared with the conventional two-stage clapboard, the combined clapboard is formed by connecting two specially-made clapboards through specially-made bolts, and the axial space is reduced by reducing the front-back pressure difference of a single clapboard due to the increase of the stages.
Description
Technical Field
The utility model relates to an industrial steam turbine technical field, concretely relates to joint baffle of industrial steam turbine.
Background
In industrial production, a steam turbine is directly used as a prime mover to drive large mechanical equipment, such as large fans, feed water pump compressors and other relatively high-power equipment, and the steam turbine for the purpose is called an industrial steam turbine. A turbine for driving a machine such as a pump, a blower, a compressor, or a turbine for power generation closely related to an industrial production process. The industrial steam turbine can use fuel or steam generated in a boiler by-product heat energy in various industrial production flows, and can also use residual steam in the production flows.
The industrial steam turbine is one of important auxiliary machine parts of a thermodynamic cycle system of a power station, is safe, reliable and efficient, and directly influences the stability and the economical efficiency of the whole power station. The core energy of the industrial steam turbine is converted into pressure stages, and each pressure stage comprises a first-stage partition plate and a first-stage moving blade. The efficiency of the steam turbine is directly related to the pressure level, and the small enthalpy drop multi-level is a key method for improving the efficiency of the industrial steam turbine.
The traditional industrial steam turbine diaphragm structure is composed of an outer ring, a static blade, an inner ring and the like. The outer ring and the inner ring are equally divided into an upper half and a lower half, the upper half and the lower half are respectively subjected to rough machining, the static blades are also independently machined, welding grooves are formed in certain areas of the top sections and the root sections of the static blades and are welded on the inner ring and the outer ring of the partition, finish machining is performed after assembly welding, and finally each stage of partition is installed in the corresponding cylinder or partition sleeve groove stop.
The traditional industrial steam turbine partition installation mode is that a first-level partition is placed on a cylinder or a partition sleeve groove rail, the one-to-one design is quite common in the design of a new machine set, and for the design of the new machine set, because all parts are newly designed, the number of the machine set partitions is not limited by the space of the cylinder or the partition sleeve. However, for the modification of the unit, the outer cylinder of the unit is not generally replaced, so that the through-flow design space of the unit is severely limited, and the key for improving the efficiency is to increase the number of stages in the limited space of the old cylinder.
Therefore, a combined partition plate is needed to meet the requirement of improving the unit grading and efficiency improvement, and the space occupied by the combined partition plate is far lower than the normal requirement of the conventional two-stage partition plate through structural optimization.
SUMMERY OF THE UTILITY MODEL
Occupy the space big and lead to the limited problem in later stage transformation space to prior art baffle, the utility model provides an industrial steam turbine's joint baffle increases the baffle progression in limited space, reserves the space for later stage transformation design.
The utility model provides a joint baffle of industrial steam turbine, include: the novel combined diaphragm comprises a first-stage diaphragm outer ring, a second-stage diaphragm outer ring, a first-stage diaphragm fixed blade, a second-stage diaphragm fixed blade, a first-stage diaphragm inner ring and a second-stage diaphragm inner ring, wherein the first-stage diaphragm fixed blade is arranged at the lower part of the first-stage diaphragm outer ring, the first-stage diaphragm fixed blade is connected with the first-stage diaphragm outer ring in a welding mode, the first-stage diaphragm inner ring is arranged at the lower part of the first-stage diaphragm fixed blade, the first-stage diaphragm inner ring is connected with the first-stage diaphragm fixed blade in a welding mode, the second-stage diaphragm fixed blade is arranged at the lower part of the second-stage diaphragm fixed blade, the second-stage diaphragm inner ring is connected with the second-stage diaphragm fixed blade in a welding mode, the upper part of the first-stage diaphragm outer ring is connected with the upper part of the second-stage diaphragm outer ring, and the first-stage diaphragm outer ring and the second-stage diaphragm outer ring form a combined diaphragm outer ring, and two diaphragms are connected together to form a whole combined diaphragm.
Furthermore, the upper portion of the outer ring of the first-stage partition plate is provided with a bolt counter bore, the upper portion of the outer ring of the second-stage partition plate is provided with a threaded hole, and the outer ring of the first-stage partition plate penetrates through the bolt counter bore through a connecting bolt to be connected with the threaded hole of the outer ring of the second-stage partition plate.
Furthermore, a positioning pin is arranged on the bolt counter bore, the mounting direction of the positioning pin is perpendicular to that of the connecting bolt, the mounting position is determined, and the connecting bolt is convenient to mount.
Furthermore, the bolt counter bore is arranged on the shoulder end face of the upper part of the outer ring of the primary partition plate, and the threaded hole is arranged on the shoulder end face of the upper part of the outer ring of the secondary partition plate.
Furthermore, a lug groove is formed in the outer ring of the combined partition plate, a partition plate lug is arranged in the lug groove and connected with the cylinder through a fixing screw, and therefore assembly work is completed.
Furthermore, a bottom key groove is formed in the outer ring of the combined partition plate, a bottom key is arranged in the bottom key groove, and the bottom key is connected with the cylinder to complete assembly work.
The beneficial effects of the utility model reside in that: the axial space of the combined clapboard is reduced by about 35 percent compared with the conventional two-stage clapboard, the combined clapboard is formed by connecting two specially-made clapboards through specially-made bolts, and the axial space can be further reduced by narrowing the thickness of the specially-made clapboard due to the reduction of the front-back pressure difference of the single specially-made clapboard increased by the stages. Through experimental trial, the combined partition plate structure is reliable and easy to install, the axial space occupation is small, the feasibility of a small enthalpy drop multi-stage design scheme is powerfully supported, and the energy-saving and efficiency-improving effects are further ensured; meanwhile, the two ends of the static blades of the steam turbine directly-welded clapboard are accurately positioned with the outer ring of the clapboard and the inner ring of the clapboard, the installation and the welding are easy, and the process of marking and positioning the static blades is saved when the static blades are welded with the outer ring of the clapboard and the inner ring of the clapboard, thereby simplifying the manufacturing process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the installation structure of the partition plate sleeve groove rail of the present invention.
FIG. 3 is a schematic structural view of the joint diaphragm outer ring with the strap groove and the bottom key groove.
FIG. 4 is a schematic view of the structure of the joint diaphragm outer ring diaphragm tab assembly.
Fig. 5 is a structural schematic diagram of the bottom key assembly of the combined outer ring diaphragm.
In the figure, 1, a first-stage diaphragm outer ring, 2, a second-stage diaphragm outer ring, 3, a first-stage diaphragm stationary blade, 4, a second-stage diaphragm stationary blade, 5, a first-stage diaphragm inner ring, 6, a second-stage diaphragm inner ring, 7, a combined diaphragm outer ring, 8, a positioning pin, 9, a connecting bolt, 10, a lug groove, 11, a bottom key groove, 12 diaphragm lugs, 13, a fixing screw, 14, a cylinder, 15 and a bottom key.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
A diaphragm assembly for an industrial steam turbine, comprising: the novel combined diaphragm comprises a primary diaphragm outer ring 1, a secondary diaphragm outer ring 2, a primary diaphragm stationary blade 3, a secondary diaphragm stationary blade 4, a primary diaphragm inner ring 5 and a secondary diaphragm inner ring 6, wherein the primary diaphragm stationary blade 3 is arranged at the lower part of the primary diaphragm outer ring 1, the primary diaphragm stationary blade 3 is connected with the primary diaphragm outer ring 1 in a welding mode, the primary diaphragm inner ring 5 is arranged at the lower part of the primary diaphragm stationary blade 3, the primary diaphragm inner ring 5 is connected with the primary diaphragm stationary blade 3 in a welding mode, the secondary diaphragm stationary blade 4 is arranged at the lower part of the secondary diaphragm outer ring 2, the secondary diaphragm stationary blade 4 is connected with the secondary diaphragm outer ring 2 in a welding mode, the secondary diaphragm inner ring 6 is arranged at the lower part of the secondary diaphragm stationary blade 4, the secondary diaphragm inner ring 6 is connected with the secondary diaphragm stationary blade 4 in a welding mode, the upper part of the primary diaphragm outer ring 1 is connected with the upper part of the secondary diaphragm outer ring 2, the primary diaphragm outer ring 1 and the secondary diaphragm outer ring 2 form a combined diaphragm outer ring 7, and two diaphragms are connected together to form a whole combined diaphragm.
The upper portion of one-level baffle outer loop 1 is provided with the bolt counter bore, the bolt counter bore sets up on the convex shoulder terminal surface on 1 upper portion of one-level baffle outer loop, the upper portion of second grade baffle outer loop 2 is provided with the screw hole, the screw hole sets up on the convex shoulder terminal surface on 2 upper portions of second grade baffle outer loop, be provided with locating pin 8 on the bolt counter bore, the installation direction of locating pin 8 is perpendicular with connecting bolt 9's installation direction, confirm the mounted position, make things convenient for connecting bolt 9 to install, one-level baffle outer loop 1 passes the bolt counter bore through connecting bolt 9 and is connected with the screw hole of second grade baffle outer loop 2.
The joint clapboard outer ring 7 is respectively provided with a clapboard groove 10 and a bottom key groove 11, the clapboard lug 12 is arranged in the clapboard groove 10, the clapboard lug 12 is connected with a cylinder 14 through a fixing screw 13, the bottom key 15 is arranged in the bottom key groove 11, and the bottom key 15 is connected with the cylinder 14, so that the assembly work is completed.
The beneficial effects of the utility model reside in that: the axial space of the combined clapboard is reduced by about 35 percent compared with the conventional two-stage clapboard, the combined clapboard is formed by connecting two specially-made clapboards through specially-made bolts, and the axial space can be further reduced by narrowing the thickness of the specially-made clapboard due to the reduction of the front-back pressure difference of the single specially-made clapboard increased by the stages. Through experimental trial, the combined partition plate structure is reliable and easy to install, the axial space occupation is small, the feasibility of a small enthalpy drop multi-stage design scheme is powerfully supported, and the energy-saving and efficiency-improving effects are further ensured; meanwhile, the two ends of the static blades, the outer ring of the clapboard and the inner ring of the clapboard are accurately positioned and are easy to install and weld, and the process of marking and positioning the static blades is omitted when the static blades are welded with the outer ring of the clapboard and the inner ring of the clapboard, so that the manufacturing process is simplified.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention.
Claims (6)
1. A diaphragm assembly for an industrial steam turbine, comprising: the outer ring of the first-stage partition plate, the outer ring of the second-stage partition plate, the fixed blade of the first-stage partition plate, the fixed blade of the second-stage partition plate, the inner ring of the first-stage partition plate and the inner ring of the second-stage partition plate are arranged on the lower portion of the outer ring of the first-stage partition plate, the fixed blade of the first-stage partition plate is connected with the outer ring of the first-stage partition plate in a welding mode, the inner ring of the first-stage partition plate is connected with the fixed blade of the first-stage partition plate in a welding mode, the fixed blade of the second-stage partition plate is arranged on the lower portion of the fixed blade of the second-stage partition plate, the inner ring of the second-stage partition plate is connected with the fixed blade of the second-stage partition plate in a welding mode, the upper portion of the outer ring of the first-stage partition plate is connected with the upper portion of the outer ring of the second-stage partition plate, and the outer ring of the first-stage partition plate and the outer ring of the second-stage partition plate form a combined outer ring.
2. The diaphragm assembly of claim 1, wherein the outer ring of the primary diaphragm has a countersunk bolt hole in its upper portion, the outer ring of the secondary diaphragm has a threaded hole in its upper portion, and the outer ring of the primary diaphragm is connected to the threaded hole of the outer ring of the secondary diaphragm by a connecting bolt passing through the countersunk bolt hole.
3. The diaphragm assembly of claim 2 wherein the bolt counter bore is provided with a locating pin, the locating pin being mounted in a direction perpendicular to the mounting direction of the connecting bolt.
4. The diaphragm assembly of claim 2 wherein the bolt counter bore is disposed in the shoulder end face of the upper portion of the outer ring of the primary diaphragm and the threaded bore is disposed in the shoulder end face of the upper portion of the outer ring of the secondary diaphragm.
5. The diaphragm assembly of claim 1 wherein the outer ring of the diaphragm assembly has a groove for receiving a diaphragm tab, the groove having a plate tab therein, the plate tab being connected to the cylinder by a set screw.
6. The diaphragm according to claim 1 wherein the outer ring of the diaphragm has a bottom key slot, and the bottom key slot has a bottom key therein, and the bottom key is connected to the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221849289.0U CN217976340U (en) | 2022-07-18 | 2022-07-18 | Combined partition plate of industrial steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221849289.0U CN217976340U (en) | 2022-07-18 | 2022-07-18 | Combined partition plate of industrial steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217976340U true CN217976340U (en) | 2022-12-06 |
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ID=84280780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221849289.0U Active CN217976340U (en) | 2022-07-18 | 2022-07-18 | Combined partition plate of industrial steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217976340U (en) |
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2022
- 2022-07-18 CN CN202221849289.0U patent/CN217976340U/en active Active
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