CN214641152U - Steam turbine self-contained crown whistling type whole-circle assembly tool for partition plate - Google Patents
Steam turbine self-contained crown whistling type whole-circle assembly tool for partition plate Download PDFInfo
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- CN214641152U CN214641152U CN202022474548.3U CN202022474548U CN214641152U CN 214641152 U CN214641152 U CN 214641152U CN 202022474548 U CN202022474548 U CN 202022474548U CN 214641152 U CN214641152 U CN 214641152U
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Abstract
The utility model relates to a steam turbine self-contained crown whisking-fit type baffle whole-circle assembly tool, which comprises a tool bottom plate, a whole-circle baffle inner ring, a whole-circle static blade group, a whole-circle baffle outer ring, an inner ring compression device, an outer ring compression device and a plurality of static blade jacking devices; the inner ring of the partition plate, the static blade group and the outer ring of the partition plate are arranged on the tool bottom plate; the inner ring pressing device is arranged on the tool bottom plate to press the inner ring of the partition plate on the tool bottom plate; the outer ring pressing device is arranged on the tooling bottom plate to press the outer ring of the partition plate on the tooling bottom plate; the plurality of static blade jacking devices correspond to the static blades in the static blade group one by one and jack the static blades on the tool bottom plate. The utility model has the advantages that: through the assembly of the whole-circle assembly tool for the partition plate, the blade gaps in the partition plate and the axial gaps between the blades and the inner ring and the outer ring of the partition plate are all reduced. In addition, the whole-circle assembled partition plate is convenient for realizing whole-circle welding processing in the subsequent partition plate welding process, and the welding efficiency is improved.
Description
Technical Field
The utility model belongs to steam turbine baffle field of making, concretely relates to steam turbine is from taking hat to whisk and is joined in marriage formula baffle full circle assembly fixture.
Background
The diaphragms serve to fix the stationary blades and form separate partitions of the stages of the steam turbine. The partition plate is one of important parts with high technical content and requirement, large batch and complex structure in the steam turbine, and occupies a great proportion in the production of the steam turbine. The modern turbine partition plate is mostly assembled into a whole by welding the blades, the inner ring and the outer ring, so that the aims of eliminating vibration and reducing steam leakage are fulfilled. Because the influence of the manufacturing precision of the partition board on the efficiency of the steam turbine is great, great attention is paid to partition board processing by various large partition board manufacturers at home and abroad, great material resources and energy are invested to improve the partition board processing mode, the partition board processing quality and efficiency are improved, and the production cost is reduced.
In the prior art, the self-crown-mounted diaphragm of the steam turbine is generally divided into two parts at a horizontal middle section, a full circle structure of a low-pressure diaphragm of a certain stage is shown in fig. 1, a half circle structure is shown in fig. 2, and the diaphragm is composed of a diaphragm inner ring 1, a stator blade group 2 and a diaphragm outer ring 3. At present, the prior art generally adopts the mode of half-turn assembly and processing, however, the processing mode of half-turn assembly can make the clearance easily produce between the blade, and half-turn welding is difficult to automatic welding, and production efficiency is low.
Therefore, a diaphragm having a small vane gap and capable of being welded in a complete circle is required.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to solve the problem that exists among the prior art because produce the clearance easily between the blade that the half-turn assembly leads to, should not automatic welding, production efficiency is low, the utility model provides a steam turbine is from taking the hat to half-turn the whole circle assembly fixture of formula baffle of fitting.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
a whole-circle assembly tool for a self-crown-carrying matched partition plate of a steam turbine comprises a tool bottom plate, a whole-circle partition plate inner ring, a whole-circle static blade group, a whole-circle partition plate outer ring, an inner ring pressing device, an outer ring pressing device and a plurality of static blade jacking devices;
the inner ring of the partition plate, the static blade group and the outer ring of the partition plate are arranged on the tool bottom plate;
the inner ring pressing device is arranged on the tool bottom plate to press the inner ring of the partition plate on the tool bottom plate;
the outer ring pressing device is arranged on the tooling bottom plate to press the outer ring of the partition plate on the tooling bottom plate;
the plurality of static blade jacking devices correspond to the static blades in the static blade group one by one and jack the static blades on the inner ring of the clapboard.
Preferably, the thickness of the tooling bottom plate is greater than or equal to 95 mm.
Preferably, the tool bottom plate is provided with an inner side thread bottom hole and an outer side thread bottom hole, the inner ring pressing device is connected to the tool bottom plate through the inner side thread bottom hole, and the outer ring pressing device is connected to the tool bottom plate through the outer side thread bottom hole;
an annular positioning groove is formed between the inner side thread bottom hole and the outer side thread bottom hole, and the static blade jacking device is fixed in the annular positioning groove.
Preferably, the inner ring pressing means comprises: the inner equal-height block, the inner pressing plate, the inner stud, the inner gasket and the inner nut;
the inner equal-height block is welded below the pressure plate;
the lower end of the inner stud is connected with the inner side threaded bottom hole, and the upper end of the inner stud is sleeved with the inner nut;
the inner gasket is sleeved on the inner double-ended stud and is positioned below the inner nut;
the inner pressing plate compresses the inner ring of the clapboard through the inner nut and the inner gasket.
Preferably, the outer ring pressing means includes: the outer equal-height block, the outer pressing plate, the outer stud, the outer gasket and the outer nut;
the outer equal-height block is welded below the outer pressing plate;
the lower end of the outer stud is connected with the outer side threaded bottom hole, and the upper end of the outer stud is sleeved with an outer nut;
the outer gasket is sleeved on the outer double-ended stud and is positioned below the outer nut;
the outer pressing plate presses the outer ring of the clapboard through the outer nut and the outer gasket.
Preferably, the stationary blade jacking device includes: the jacking bolt, the supporting seat and the positioning pin are inserted into the annular positioning groove, and the jacking bolt jacks the static blades tightly.
Preferably, assembly fixture still includes the holding ring, and the holding ring is located the upside of baffle inner ring outer edge, and the excircle diameter of holding ring is the same with the excircle fitting surface diameter of baffle inner ring.
Preferably, the assembly tool further comprises an equal-height ring for supporting the static blade group;
the equal-height ring comprises 6-8 groups of equal-height blocks, and the equal-height blocks are spot-welded on the tool bottom plate.
Preferably, the assembly fixture further comprises a splash cover plate, and the splash cover plate is welded on the steam outlet side of the steam passage of the static blade group.
Preferably, the inner ring of the partition plate comprises two half rings which are fixedly connected into a whole by a butt strap.
(III) advantageous effects
The utility model has the advantages that: the whole-circle processing of the partition plate is realized through the partition plate whole-circle assembly tool, and gaps among the blades in the partition plate and axial gaps among the blades, the partition plate inner ring and the partition plate outer ring are all reduced through the assembly of the partition plate whole-circle assembly tool. In addition, the whole-circle assembly tool for the partition plate is adopted to assemble the partition plate, the whole-circle welding processing of the partition plate is conveniently realized in the subsequent partition plate welding process, and the welding efficiency is improved exponentially.
Drawings
FIG. 1 is a schematic view of a full-circle structure of a prior art separator plate;
FIG. 2 is a schematic view of a half-turn structure of a prior art baffle;
FIG. 3 is a schematic view of the assembly of the middle partition plate stationary blade set of the present invention;
FIG. 4 is a sectional view of the assembly of the middle baffle stationary blade set of the present invention;
fig. 5 is a schematic structural view of the middle tooling bottom plate of the present invention;
FIG. 6 is a schematic structural view of a stationary blade pressing device according to the present invention;
FIG. 7 is a schematic structural view of the outer ring of the middle heat exchanger baffle of the present invention;
fig. 8 is a schematic structural view of the middle inner ring pressing device of the present invention;
fig. 9 is a schematic structural diagram of the middle and outer ring pressing device of the present invention.
[ description of reference ]
1: a baffle inner ring; 2: a stationary vane group; 3: a diaphragm outer ring; 4: a tooling bottom plate; 5: an inner ring pressing device; 6: a positioning ring; 7: iso-high rings; 8: a stationary blade jacking device; 9: a butt strap; 10: an outer ring pressing device; 11: a splash cover plate;
41: an inside threaded bottom hole; 42: an outer threaded bottom hole; 43: an annular positioning groove;
51: inner equal-height blocks; 52: an inner pressure plate; 53: an inner stud; 54: an inner gasket; 55: an inner nut;
81: jacking the bolt; 82: a supporting seat; 83: a positioning pin hole;
101: outer equal-height blocks; 102: an outer pressing plate; 103: an outer stud; 104: an outer gasket; 105: an outer nut.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
Referring to fig. 3 to 9, the present embodiment provides a full-circle diaphragm assembling tool with a crown for a steam turbine, including a tool bottom plate 4, a full-circle diaphragm inner ring 1, a full-circle stator blade set 2, a full-circle diaphragm outer ring 3, an inner ring pressing device 5, an outer ring pressing device 10, and a plurality of stator blade jacking devices 8.
The diaphragm inner ring 1, the stationary blade group 2 and the diaphragm outer ring 3 are mounted on a tooling bottom plate 4.
The inner ring pressing device 5 is installed on the tooling bottom plate 4 to press the inner ring 1 of the partition plate on the tooling bottom plate 4.
The outer ring pressing device 10 is installed on the tooling bottom plate 4 to press the diaphragm outer ring 3 against the tooling bottom plate 4.
The plurality of stationary blade urging devices 8 correspond one-to-one to the stationary blades in the stationary blade group 2 and urge the stationary blades against the diaphragm inner ring 1.
The whole circle processing of baffle is realized through baffle whole circle assembly fixture to this embodiment, and through the equipment of baffle whole circle assembly fixture, the clearance between the blade in the baffle and the axial clearance between blade and baffle inner ring, the baffle outer loop all reduce, are favorable to the welding.
Preferably, the thickness of the tooling bottom plate 4 is greater than or equal to 95mm so as to meet the rigidity requirement of the tooling bottom plate 4.
Preferably, the tool bottom plate 4 is provided with an inner threaded bottom hole 41 and an outer threaded bottom hole 42, the inner ring pressing device 5 is connected to the tool bottom plate 4 through the inner threaded bottom hole 41, and the outer ring pressing device 10 is connected to the tool bottom plate 4 through the outer threaded bottom hole 42.
An annular positioning groove 43 is formed between the inner threaded bottom hole 41 and the outer threaded bottom hole 42, and the static blade jacking device 8 is fixed in the annular positioning groove 43.
Preferably, the stationary blade jacking device 8 includes: the supporting seat is provided with a puller bolt 81, a supporting seat 82 and a positioning pin 83, the positioning pin 83 is inserted into the annular positioning groove 43, and the puller bolt 81 tightly pushes the stationary blades.
Preferably, the inner ring pressing device 5 comprises: an inner equal-height block 51, an inner pressure plate 52, an inner gasket 54 of an inner stud 53 and an inner nut 55.
An inner equal-height block 51 is welded below the inner platen 52.
The lower end of the inner stud 53 is connected with the inner side threaded bottom hole 41, and the upper end of the inner stud 53 is sleeved with an inner nut 55.
The inner washer 54 is sleeved on the inner stud 53 and is positioned below the inner nut 55. The inner pressing plate 52 presses the inner ring 1 of the partition board through the inner nut 55 and the inner gasket 54, and the inner pressing plate 52 can press the inner ring 1 of the partition board by adjusting the tightness degree of the inner nut 55 and the inner gasket 54.
Preferably, the outer ring pressing means 10 includes: outer contour block 101, outer platen 102, outer stud 103, outer spacer 104 and outer nut 105.
The outer contour blocks 101 are welded to the underside of the platen.
The lower end of the outer stud 103 is connected with the outer threaded bottom hole 42, and the upper end of the outer stud 103 is sleeved with an outer nut 105.
The outer gasket 104 is sleeved on the outer stud 103 and is positioned below the outer nut 105. The outer pressure plate 102 presses the diaphragm outer ring 3 through the outer nut 105 and the outer gasket 104, and the outer pressure plate 102 can press the diaphragm outer ring 3 by adjusting the tightness degree of the outer nut 105 and the outer gasket 104.
The structure of the outer ring pressing device 10 is completely the same as that of the inner ring pressing device 5, and the difference is that the heights of the equal-height blocks are slightly different.
Preferably, assembly fixture still includes holding ring 6, and holding ring 6 is located the upside of baffle inner ring 1 outer edge, and the excircle diameter of holding ring 6 is the same with the excircle fitting surface diameter of baffle inner ring. Because the bottom of the inner circumferential band of the static blade group 2 is lapped on the outer edge side of the inner diaphragm ring 1, the contact height of the inner circumferential band with the outer circumferential matching surface of the inner diaphragm ring 1 is small and is only 5mm, so that the static blade group 2 is unstable in fixation and easy to loosen, and the positioning ring 6 is additionally arranged on the outer edge upper side of the inner diaphragm ring 1.
Preferably, the assembly fixture further comprises a contour ring 7 for supporting the stationary blade group.
The equal-height ring 7 comprises 6-8 groups of equal-height blocks, and the equal-height blocks are spot-welded on the tool bottom plate 4. The iso-high ring 7 provides a high support for the stationary blade group 2 while ensuring the axial installation dimension of the stationary blade group 2.
Preferably, the assembly tool further comprises a splash cover plate 11, and the splash cover plate 11 is welded on the steam outlet side of the steam passage of the static blade group 2. The function of the splashboard 11 includes: 1. the static blade group 2 is protected, and the welding flow in the welding process is prevented from flowing to the static blade group 2 to cause damage. 2. The static blade group 2 is reinforced, and the static blade group 2 is relatively weak, so that the static blade group can be supported after the splash cover plate 11 is welded. 3. The stationary blade group 2 is prevented from being deformed during welding. 4. Connecting the diaphragm inner ring 1 and the diaphragm outer ring 3.
Preferably, the inner ring 1 of the partition comprises two half rings which are fixedly connected into a whole by the lapping plate 9.
The embodiment also provides an assembly method for assembling the steam turbine partition plate in a whole circle by adopting the assembly tool, which comprises the following steps:
s1: installing a partition plate inner ring 1 consisting of two semi-rings on a tool bottom plate 4, and fixedly connecting the connection parts of the two semi-rings by adopting a lapping plate 9;
an inner threaded bottom hole 41 is formed in the tool bottom plate 4, and the inner ring pressing device 5 is connected to the tool bottom plate 4 through the inner threaded bottom hole 41 and presses the inner ring partition plate 1 tightly. An outer threaded bottom hole 42 is further formed in the tooling bottom plate 4, and the outer threaded bottom hole 42 is used for being connected with an outer ring pressing device 10 for pressing the outer ring 3 of the partition plate.
And installing the whole circle of the inner ring 1 of the partition plate on the tooling bottom plate 3, and pressing the inner ring 1 of the partition plate through the inner ring pressing device 5.
S2: all the static blades in the whole circle of static blade group 2 are tightly pressed on the tool bottom plate 4 through the plurality of static blade pressing devices 8 in a one-to-one correspondence mode, so that no gap exists between the static blades in the circumferential direction, and the maximum gap between the static blade group 2 and the diaphragm inner ring 1 is 0.2 mm. In step S2, the interference between the stator blade assembly 2 and the diaphragm inner ring 1 is 0-0.2mm to ensure the diaphragm inner ring 1 and the stator blade assembly 2 are in a tight-packed state, so as to eliminate the gap between the diaphragm inner ring 1 and the stator blade assembly 2 and prevent the stator blades from loosening.
S3: after the static blade group 2 is assembled, the static blade jacking device 8 is removed, the outer diaphragm ring 3 is heated, and the outer diaphragm ring 3 and the static blade group 2 are in interference fit for 0.5 mm.
S4: and pressing the diaphragm outer ring 3 heated in the step S4 on the tooling bottom plate 4 by using an outer ring pressing device 10. In step S3, the diaphragm outer ring 3 before heating needs to have a size that satisfies an interference of 0.5mm with the stationary blade group 2. The heated diaphragm outer ring 3 expands, the inner circle diameter of the diaphragm outer ring is larger than the outer circle diameter of the static blade group 2, the heated diaphragm outer ring 3 is assembled with the static blade group 2 and the diaphragm inner ring 1 in step S4, after the diaphragm outer ring 3 is cooled, the size shrinkage of the diaphragm outer ring becomes small, the diaphragm outer ring can be fastened on the outer side of the static blade group 2, the gap between the static blade group 2 and the diaphragm outer ring 3 is basically eliminated, and the static blade group 2 and the diaphragm outer ring 3 cannot loosen.
S5: and after the outer ring 3 of the partition plate is cooled, the inner ring pressing device 5 and the outer ring pressing device 10 are removed, the whole partition plate is taken down from the tooling bottom plate 4, then the splash-proof cover plate 11 of the steam inlet side steam passage is welded in a turning way, and the splash-proof cover plate 11 connects the inner and outer peripheral belts of the static blade group 2.
S6: and an automatic welding machine is used for welding the grooves on the inner ring 1 and the outer ring 3 of the baffle plate.
Preferably, in step S4, the outer ring of the diaphragm is heated by an electric heater, the outer ring 3 of the diaphragm is made of Q345B 20-300 ℃, the linear expansion coefficient α is 12.31mm/(mm · ° c), the heating temperature is 200 ℃, the holding time is 4h, after the heating is completed, the furnace cover is opened, the inner diameter of the outer ring 3 of the diaphragm is measured, and when the inner diameter of the outer ring 3 of the diaphragm is measured to be 1.5mm larger than the outer diameter of the outer circle of the blade, the outer ring 3 of the diaphragm is taken out of the furnace and sleeved.
And when the difference between the inner diameter of the outer ring 3 of the partition plate and the outer diameter of the outer circle of the blade is measured to be less than 1.5mm, returning the outer ring of the partition plate to the furnace for continuous heating.
Preferably, in step S6, the positioning ring 6 is taken out before the groove is welded.
The above embodiments are only for explaining the present invention, and do not constitute the limitation of the protection scope of the present invention, and those skilled in the art can make various changes or modifications within the scope of the claims, all of which belong to the essence of the present invention.
Claims (10)
1. The full-circle assembly tool for the self-crown-carrying matched partition plate of the steam turbine is characterized by comprising a tool bottom plate (4), a full-circle partition plate inner ring (1), a full-circle static blade group (2), a full-circle partition plate outer ring (3), an inner ring pressing device (5), an outer ring pressing device (10) and a plurality of static blade jacking devices (8);
the clapboard inner ring (1), the static blade group (2) and the clapboard outer ring (3) are arranged on the tool bottom plate (4);
the inner ring pressing device (5) is arranged on the tool bottom plate (4) to press the baffle inner ring (1) on the tool bottom plate (4);
the outer ring pressing device (10) is arranged on the tool bottom plate (4) to press the baffle outer ring (3) on the tool bottom plate (4);
the plurality of stationary blade jacking devices (8) correspond to the stationary blades in the stationary blade group (2) one by one and jack the stationary blades on the diaphragm inner ring (1).
2. The baffle full circle assembly fixture according to claim 1, characterized in that the thickness of the fixture bottom plate (4) is greater than or equal to 95 mm.
3. The baffle full-circle assembly tool according to claim 1, wherein the tool bottom plate (4) is provided with an inner threaded bottom hole (41) and an outer threaded bottom hole (42), the inner ring pressing device (5) is connected to the tool bottom plate (4) through the inner threaded bottom hole (41), and the outer ring pressing device (10) is connected to the tool bottom plate (4) through the outer threaded bottom hole (42);
an annular positioning groove (43) is formed between the inner side thread bottom hole (41) and the outer side thread bottom hole (42), and the static blade jacking device (8) is fixed in the annular positioning groove (43).
4. The baffle full circle assembly fixture of claim 3, wherein the inner ring pressing device (5) comprises: the inner equal-height block (51), the inner pressure plate (52), the inner stud (53), the inner gasket (54) and the inner nut (55);
the inner equal-height block (51) is welded below the inner pressure plate (52);
the lower end of the inner stud (53) is connected with the inner side threaded bottom hole (41), and the inner nut (55) is sleeved at the upper end of the inner stud (53);
the inner gasket (54) is sleeved on the inner stud (53) and is positioned below the inner nut (55);
the inner pressing plate (52) presses the clapboard inner ring (1) through the inner nut (55) and the inner gasket (54).
5. The diaphragm full circle assembling tool according to claim 3, wherein the outer ring pressing device (10) comprises: the outer equal-height block (101), an outer pressure plate (102), an outer stud (103), an outer gasket (104) and an outer nut (105);
the outer equal-height block (101) is welded below the outer pressure plate (102);
the lower end of the outer stud (103) is connected with the outer threaded bottom hole (42), and the upper end of the outer stud (103) is sleeved with the outer nut (105);
the outer gasket (104) is sleeved on the outer stud (103) and is positioned below the outer nut (105);
the outer pressure plate (102) presses the diaphragm outer ring (3) through the outer nut (105) and the outer gasket (104).
6. The diaphragm full circle assembling tool according to claim 3, wherein the stationary blade jacking device (8) comprises: puller bolt (81), supporting seat (82) and locating pin (83), locating pin (83) insert in annular positioning groove (43), puller bolt (81) are right the stator blade top is tight.
7. The full-circle partition plate assembling tool according to claim 1, further comprising a positioning ring (6), wherein the positioning ring (6) is located on the upper side of the outer edge of the partition plate inner ring (1), and the outer circle diameter of the positioning ring (6) is the same as the outer circle matching surface diameter of the partition plate inner ring (1).
8. The baffle full-circle assembly tool according to claim 1, characterized by further comprising an equal-height ring (7) for supporting the static blade group (2);
the equal-height ring (7) comprises 6-8 groups of equal-height blocks, and the equal-height blocks are spot-welded on the tool bottom plate (4).
9. The baffle full-circle assembly tool according to claim 1, further comprising a splash guard plate (11), wherein the splash guard plate (11) is welded on the steam outlet side of the steam passage of the static blade group (2).
10. The diaphragm full circle assembly tool according to claim 1, wherein the diaphragm inner ring (1) comprises two half rings which are fixedly connected into a whole by a butt strap (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022474548.3U CN214641152U (en) | 2020-10-30 | 2020-10-30 | Steam turbine self-contained crown whistling type whole-circle assembly tool for partition plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022474548.3U CN214641152U (en) | 2020-10-30 | 2020-10-30 | Steam turbine self-contained crown whistling type whole-circle assembly tool for partition plate |
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| CN214641152U true CN214641152U (en) | 2021-11-09 |
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| CN202022474548.3U Active CN214641152U (en) | 2020-10-30 | 2020-10-30 | Steam turbine self-contained crown whistling type whole-circle assembly tool for partition plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114102028A (en) * | 2021-12-25 | 2022-03-01 | 常州凯度机电有限公司 | Welding tool for steam turbine partition plate |
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2020
- 2020-10-30 CN CN202022474548.3U patent/CN214641152U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114102028A (en) * | 2021-12-25 | 2022-03-01 | 常州凯度机电有限公司 | Welding tool for steam turbine partition plate |
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