CN113843434B - Hole opening tool and hole opening method for coupler of steam turbine - Google Patents
Hole opening tool and hole opening method for coupler of steam turbine Download PDFInfo
- Publication number
- CN113843434B CN113843434B CN202111075214.1A CN202111075214A CN113843434B CN 113843434 B CN113843434 B CN 113843434B CN 202111075214 A CN202111075214 A CN 202111075214A CN 113843434 B CN113843434 B CN 113843434B
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- China
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- annular plate
- flange
- coupler
- hole opening
- tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Connection Of Plates (AREA)
Abstract
The invention relates to the field of turbines, and discloses a hole opening tool and a hole opening method for a coupler of a turbine, wherein the hole opening tool comprises a first annular plate (1), a second annular plate (2) and a supporting positioning piece (3), the first annular plate (1) and the second annular plate (2) clamp a thrust disc (41) on the periphery of the coupler (4), the supporting positioning piece (3) can be connected to the second annular plate (2) and extends to the hole opening end face of the coupler (4) from the thrust disc (41), and the supporting positioning piece (3) can position and support the hole opening tool. Through the technical scheme, the perforating tool can be accurately positioned on the coupler and provides support for the perforating tool, the perforating tool can be accurately positioned relative to the coupler, more accurate perforation is realized, the perforating quality is improved, the perforating tool can be operated on a maintenance site, the whole steam turbine rotor and the coupler do not need to be returned to a factory, the operation is simple, and the time cost is saved.
Description
Technical Field
The invention relates to the field of steam turbines, in particular to a hole opening tool for a coupler of a steam turbine and a hole opening method for field construction of the coupler of the steam turbine.
Background
In order to achieve different levels of extraction steam sources, improve the steam utilization rate, comprehensively utilize a heat source, perform steam extraction transformation on a steam turbine unit, change the original thermodynamic balance design after transformation, synchronously adjust the #1 watt, change the top clearance of a thrust combined bearing, increase the axial torque force, change a rear end face hole of a steam turbine coupler, reduce the axial torque force of a key, prevent radial withdrawal and cause potential safety hazards.
The existing operation method is to return the rotor to a host factory, use a large-scale special tapping tool to tap the end face of the tooth-shaped coupler of the main oil pump, then assemble a pin for preventing thread withdrawal, and use the pin after dynamic balance. However, the annual utilization hour of the backpressure unit in the chemical area is about 7000h \ year, the overhaul time is limited by production, the back pressure unit cannot be returned to a factory for implementing hole opening, the overall benefit of the device is ensured by on-site positioning, hole opening and assembling, the required precision is less than or equal to 0.05mm, no existing portable hole opening tool exists in the industry at present, hole opening is required to be carried out according to the on-site size adjustment, and the hole opening positioning precision is difficult to ensure.
Disclosure of Invention
The invention aims to provide a hole opening tool for a coupler of a steam turbine, which solves the problems that the coupler needs to be returned to a factory for maintenance, the operation is inconvenient, and the hole opening positioning is inaccurate.
In order to achieve the above object, in one aspect, the present invention provides a hole opening tool for a coupling of a steam turbine, where the hole opening tool includes a first annular plate, a second annular plate, and a supporting and positioning member, the first annular plate and the second annular plate can be axially connected to each other at intervals and clamp a thrust disc on an outer periphery of the coupling, the supporting and positioning member can be connected to the second annular plate and extend from the thrust disc to a hole opening end surface of the coupling, and the supporting and positioning member can position and support a hole opening tool.
Alternatively, the support positioning member includes a first flange and a second flange and a support pipe connected between the first flange and the second flange, and the second flange may be detachably connected to the second annular plate.
Optionally, the first flange, the second flange and the support tube are welded together.
Optionally, an annular positioning boss is disposed on an end surface of the second flange facing the first flange, and the support tube is sleeved on the positioning boss.
Optionally, an annular positioning concave table is arranged on the end face of the first flange facing the second flange, and the support tube is inserted into the positioning concave table.
Optionally, the second flange and the second annular plate are connected by bolts.
Alternatively, the first annular plate and the second annular plate are connected by bolts.
Optionally, the first annular plate, the second annular plate and the second flange are clearance fit with the coupling.
Alternatively, the first annular plate is divided into a plurality of portions in the circumferential direction.
In addition, the invention also provides a method for opening the hole of the coupling of the steam turbine, wherein the hole opening method uses the hole opening tool of the coupling of the steam turbine.
Through the technical scheme, the perforating tool can be accurately positioned on the coupler and provides support for the perforating tool, the perforating tool can be accurately positioned relative to the coupler, more accurate perforation is realized, perforating quality is improved, the perforating tool can be operated on a maintenance site, the rotor coupler does not need to be returned, operation is simple, and time cost is saved.
Drawings
Fig. 1 is a cross-sectional view of a tapping tool and coupling according to an embodiment of the present invention.
Description of the reference numerals
1-a first annular plate, 2-a second annular plate, 3-a positioning support member, 31-a first flange, 32-a second flange, 33-a support pipe, 4-a coupler and 41-a thrust disc.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The invention provides a hole opening tool for a coupling of a steam turbine, wherein the hole opening tool comprises a first annular plate 1, a second annular plate 2 and a supporting positioning piece 3, the first annular plate 1 and the second annular plate 2 can be axially connected at intervals and clamp a thrust disc 41 on the periphery of the coupling 4, the supporting positioning piece 3 can be connected to the second annular plate 2 and extends from the thrust disc 41 to the hole opening end face of the coupling 4, and the supporting positioning piece 3 can be used for positioning and supporting a hole opening tool.
As shown in fig. 1, a thrust disc 41 is disposed on the periphery of the coupling 4, the left end of the coupling 4 is an excitation end, the right end of the coupling is a steam end, and holes need to be punched on the end face of the steam end.
The first annular plate 1 and the second annular plate 2 can be sleeved on the periphery of the coupler 4, and the thrust disc 41 can be clamped by the first annular plate 1 and the second annular plate 2, so that the first annular plate 1 and the second annular plate 2 are fixed on the coupler 4; the support and positioning element 3 can be fixedly connected to the second annular plate 2 and extends from the thrust disk 41 to the vicinity of the opening end face of the coupling 4, so that the opening tool can be positioned on the support and positioning element 3, relative positioning of the opening tool and the coupling 4 being achieved, and precise opening of the opening end face of the coupling 4 being achieved.
Wherein the first annular plate 1 and the second annular plate 2 are arranged concentrically with the coupling 4 to ensure the accuracy of the positioning.
In this scheme, the trompil frock can be fixed a position accurately on the shaft coupling, provides the support for the instrument of punching to can be so that the instrument of punching fix a position for the shaft coupling is accurate, realize punching more accurately, improve the quality of punching, the trompil frock can be operated at the maintenance scene, need not return the shaft coupling to the factory, easy operation has saved the time cost.
Wherein the supporting and positioning member 3 includes a first flange 31 and a second flange 32, and a supporting pipe 33 connected between the first flange 31 and the second flange 32, and the second flange 32 is detachably connected to the second annular plate 2. As shown in fig. 1, the first flange 31 and the second flange 32 are respectively located at two ends of the support tube 33, and the support positioning member 3 may be sleeved on the coupler 4 and may be arranged to be concentric with the coupler 4, so as to achieve concentric positioning. The second flange 32 is intended to be connected to the second annular plate 2, the first flange 31 is intended to support the tapping tool, and the support tube 33 is intended to make up the span between the thrust disc 41 and the tapping end face, so that the tapping tool can be fixed in the vicinity of the tapping end face.
Wherein the first flange 31, the second flange 32 and the support tube 33 are welded. The three parts can be manufactured separately, which simplifies the manufacturing process of each part and then connected together by welding. Of course, in other embodiments, the supporting and positioning member 3 may be an integrally formed member.
An annular positioning boss is arranged on the end face, facing the first flange 31, of the second flange 32, and the supporting tube 33 is sleeved on the positioning boss. As shown in fig. 1, a positioning boss surrounding the central hole is formed on the end surface of the second flange 32, the positioning boss forms a circular periphery, the support tube 33 is sleeved on the positioning boss, the inner diameter of the support tube 33 is substantially consistent with the outer diameter of the positioning boss, and the support tube 33 and the second flange 32 can be concentrically matched.
In addition, an annular positioning recess is provided on the end face of the first flange 31 facing the second flange 32, into which positioning recess the support tube 33 is inserted. A positioning recessed land surrounding the center hole is formed on the end surface of the first flange 31, the positioning recessed land has a circular inner circumference, the support pipe 33 is inserted into the positioning recessed land, the outer diameter of the support pipe 33 is substantially the same as the inner diameter of the positioning recessed land, and concentric fitting of the support pipe 33 and the first flange 31 can be achieved.
Alternatively, the second flange 32 and the second annular plate 2 are connected by bolts. In fig. 1, bolt holes are formed in both the second flange 32 and the second annular plate 2, and the bolt holes may be aligned with each other so that they can be connected by bolts, which are not shown in fig. 1. In other embodiments, the plate-shaped second flange 32 and the second annular plate 2 may also be clamped together by a clamping member, so that the second flange 32 and the second annular plate 2 are clamped together on the thrust disk 41.
In addition, the first annular plate 1 and the second annular plate 2 are connected by bolts. The first and second annular plates 1 and 2 are each formed with bolt holes, and the bolt holes of the two may be aligned with each other to be connected by bolts.
As shown in fig. 1, the second annular plate 2 is formed with bolt holes at different positions in the radial direction, wherein a group close to the central axis in the radial direction is used for being bolted to the second flange 32, and a group away from the central axis in the radial direction is used for being bolted to the first annular plate 1, and another part is bolted to the second flange 32.
Wherein the first annular plate 1, the second annular plate 2 and the second flange 32 are clearance fitted with the coupling 4. The inner diameters of the first annular plate 1, the second annular plate 2 and the second flange 32 are slightly larger than the outer diameter of the coupling 4, allowing fine adjustment of the positions of the first annular plate 1, the second annular plate 2 and the second flange 32 relative to the coupling 4 in the radial direction to achieve concentric positioning of the various components with the coupling 4.
Alternatively, the first annular plate 1 is divided into a plurality of portions in the circumferential direction. The first annular plate 1 is formed into a complete ring shape by splicing a plurality of portions, which may allow the plurality of portions to be circumferentially disposed around the coupling 4, which may wrap the first annular plate 1 around the coupling 4.
In addition, the invention also provides a method for opening the coupling of the steam turbine, wherein the opening method uses the opening tool of the coupling of the steam turbine. Specifically, firstly, a plurality of parts of a first annular plate 1 are sleeved on a coupler 4 and are positioned on one side, close to an excitation end, of a thrust disc 41, then a second annular plate 2 is sleeved on the coupler 4 and is positioned on one side, close to a steam end, of the thrust disc 41, the first annular plate 1 and the second annular plate 2 are connected together through bolts, and a rubber base plate can be arranged between the first annular plate 1 or the second annular plate 2 and the thrust disc 41; sleeving the positioning support piece 3 on the coupler 4 from the steam end, and connecting the second flange 32 with the second annular plate 2 through bolts; a tapping tool is provided on the first flange 31 to tap a steam end face through the tapping tool. The first flange 31 may be marked with indicia corresponding to the location of the opening.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should also be considered as disclosed in the present invention, and all such modifications and combinations are intended to be included within the scope of the present invention.
Claims (6)
1. The hole opening tool for the coupler of the steam turbine is characterized by comprising a first annular plate (1), a second annular plate (2) and a supporting positioning piece (3), wherein the first annular plate (1) and the second annular plate (2) can be axially connected with each other at intervals and clamp a thrust disc (41) on the periphery of the coupler (4), the first annular plate (1) and the second annular plate (2) can be concentric with the coupler (4), the supporting positioning piece (3) can be connected to the second annular plate (2) and extends to the hole opening end face of the coupler (4) from the thrust disc (41), and the supporting positioning piece (3) can be used for positioning and supporting the hole opening tool;
wherein the support positioning element (3) comprises a first flange (31) and a second flange (32) and a support tube (33) connected between the first flange (31) and the second flange (32), the second flange (32) being detachably connectable to the second annular plate (2);
the second flange (32) faces the end face of the first flange (31) and is provided with an annular positioning boss, the supporting tube (33) is sleeved on the positioning boss, the first flange (31) faces the end face of the second flange (32) and is provided with an annular positioning concave table, the supporting tube (33) is inserted into the positioning concave table, and the first annular plate (1) is divided into a plurality of parts along the circumferential direction.
2. Tapping tool for a coupling of a steam turbine according to claim 1, characterized in that said first flange (31), said second flange (32) and said support tube (33) are welded.
3. Tapping tool for a coupling of a steam turbine according to claim 1, characterized in that said second flange (32) and said second annular plate (2) are bolted.
4. Tapping tool for a coupling of a steam turbine according to claim 1, characterized in that said first annular plate (1) and said second annular plate (2) are connected by means of bolts.
5. The opening tool for a coupling of a steam turbine according to claim 1, characterized in that said first annular plate (1), said second annular plate (2) and said second flange (32) are clearance-fitted with said coupling (4).
6. A method of opening a coupling of a steam turbine, characterized in that the opening method uses the opening tool of the coupling of the steam turbine according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075214.1A CN113843434B (en) | 2021-09-14 | 2021-09-14 | Hole opening tool and hole opening method for coupler of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075214.1A CN113843434B (en) | 2021-09-14 | 2021-09-14 | Hole opening tool and hole opening method for coupler of steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113843434A CN113843434A (en) | 2021-12-28 |
| CN113843434B true CN113843434B (en) | 2023-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111075214.1A Active CN113843434B (en) | 2021-09-14 | 2021-09-14 | Hole opening tool and hole opening method for coupler of steam turbine |
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| Country | Link |
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| CN (1) | CN113843434B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0970704A (en) * | 1995-09-06 | 1997-03-18 | Toshiba Eng & Constr Co Ltd | Drilling method and device for radial knock of large-size rotating machine |
| JP2001334402A (en) * | 2000-05-26 | 2001-12-04 | Hitachi Plant Eng & Constr Co Ltd | Hole working method of large part and working device |
| US8308401B2 (en) * | 2008-05-28 | 2012-11-13 | K-Line Industries, Inc. | Cutter for machining counterbore in engine block |
| DE102010039594A1 (en) * | 2010-08-20 | 2012-02-23 | Siemens Aktiengesellschaft | Clutch Bore-processing device |
| CN103212734B (en) * | 2013-04-27 | 2015-05-27 | 华东理工大学 | Manual multi-purpose drilling device |
| CN104942332B (en) * | 2015-03-30 | 2020-05-19 | 南京梅山冶金发展有限公司 | Online drilling device and method for copper cooling wall of blast furnace |
| CN205315940U (en) * | 2015-08-06 | 2016-06-15 | 海宁艾可炫照明电器有限公司 | Novel online drilling device |
| CN107855566A (en) * | 2017-12-06 | 2018-03-30 | 无锡新区鸿声铝品有限公司 | A kind of portable aluminium alloy building-material factory Special-purpose puncher |
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| CN113843434A (en) | 2021-12-28 |
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