CN204827560U - Steam turbine directly welds baffle - Google Patents
Steam turbine directly welds baffle Download PDFInfo
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- CN204827560U CN204827560U CN201520556189.2U CN201520556189U CN204827560U CN 204827560 U CN204827560 U CN 204827560U CN 201520556189 U CN201520556189 U CN 201520556189U CN 204827560 U CN204827560 U CN 204827560U
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- steam turbine
- dividing plate
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- root
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Abstract
The utility model discloses a steam turbine directly welds baffle, including standard stator blade, well branch face stator blade, outer loop and inner ring, and have the blade constant head tank on outer loop and/or inner ring, standard stator blade and well branch face stator blade correspond position processing has the boss. The stator blade uses earlier the dress to weld the fixed inside and outside ring of anchor clamps when connecing with inside and outside boxing, guarantees the relative position in inside and outside loop mapping groove when fixed, then packs the stator blade baffle into along the constant head tank of inside and outside ring and carry out earlier the tack weld from going out the vapour side, and then welds with inside and outside ring stator blade both ends face to aditus laryngis area that can a bonding steam passage, and then guarantee whole level steam passage throat area improves the through -flow characteristic of whole level, the whole efficiency of assurance steam turbine.
Description
Technical field
The utility model relates to steam turbine technology field, is specifically related to a kind of steam turbine and directly welds dividing plate.
Background technique
In impulse steam turbine, middle pressure or low-pressure section adopt cast iron type dividing plate or traditional directly welded dividing plate usually.
The plate body of cast iron type dividing plate is made of cast iron, and stator blade casts between dividing plate outer shroud and inner ring, and the stator blade blade two ends of cast iron dividing plate have circular hole or otch, causes easily occurring during casting that stator blade connects the insecure phenomenon even come off; Stator blade installs location difficulty when dividing plate die sinking is cast simultaneously, causes stator blade throat dimension overproof, and then has influence on the flow area of dividing plate; Cast iron dividing plate inner and outer rings is upper and lower two halves by truncation, and the stator blade be positioned on side grain is also cut into two halves, during installation due to casting, to install and the reason such as machining error makes the two halves stator blade on tangent plane can not completely to upper, cause the rough of steam passage, thus have influence on the efficiency of steam turbine set.
Tradition directly welded dividing plate is made up of outer shroud, stator blade and inner ring, as shown in Figure 1 and Figure 2, inner ring 3, outer shroud 1 are divided into upper and lower two halves, separately processing separately, stator blade 2 is also processed separately, bevelling in the certain area of stator blade top cross-section and root section, then inner ring 3, outer shroud 1 separately line separately, inner ring 3, outer shroud 1 is fixed again with assembling-welding fixtures, trial assembly, repair accurate all stator blades 2, finally by the top of stator blade 2 and the bevel for welding of root, stator blade 2 and inner ring 3, outer shroud 1 are welded.Whole course of working is more loaded down with trivial details, the welding equipment location comparison difficulty of stator blade 2 is determined by artificial line, when welding with inner ring 3, outer shroud 1 by the root of stator blade 2, top in addition, the position of stator blade 2 easily changes, after finally causing heat treatment can there is larger dislocation in the position of stator blade 2, thus be difficult to ensure steam passage throat opening area, have influence on the through-current capability of unit, reduce unit efficiency.
So, be necessary to design a kind of Novel partition to replace cast iron type dividing plate and traditional directly welded dividing plate, be difficult to ensure throat opening area to overcome existing structure, reduce the shortcoming of unit efficiency.
Model utility content
In view of this, main purpose of the present utility model is to provide a kind of steam turbine directly to weld dividing plate.
To achieve these goals, the utility model proposes a kind of steam turbine and directly weld dividing plate, it is characterized in that, this steam turbine directly welds dividing plate and comprises outer shroud 1, standard stator blade 2, split stator blade 8 and inner ring 3, and has blade locating slot on described outer shroud 1 and/or inner ring 3.
Wherein, described standard stator blade 2 and split stator blade 8 are bent blades.
Wherein, described standard stator blade 2 top is processed with top boss 4, and root is processed with root boss 6; Described split stator blade 8 only root is processed with root boss 6.
Wherein, the blade of described top boss 4, root boss 6 and corresponding described standard stator blade 2 or split stator blade 8 is all die forging all-in-one-pieces from top to bottom.
Wherein, the root boss 6 of described standard stator blade 2 and the steam passage part of top boss 4 are cylndrical surface or conical surface, determine according to the meridian plane angle of steam passage part;
Wherein, the steam passage part of the root boss 6 of described split stator blade 8 is cylndrical surface or conical surface, determines according to the meridian plane angle of steam passage part.
Wherein, described outer shroud 1 is divided into upper and lower two halves, and when connection standard stator blade 2, according to described boss 4 position, standard stator blade 2 top and size, on described outer shroud 1, correspondence is processed with vane tip locating slot 5; When connecting split stator blade 8, undressed on described outer shroud 1 have top locating slot.
Wherein, described outer shroud 1 is obtained by sheet fabrication.
Wherein, described inner ring 3 is divided into upper and lower two halves, and according to position and the size of described standard stator blade 2 and split stator blade 8 root boss 6, correspondence is processed with root locating slot 7.
Wherein, described inner ring 3 is obtained by sheet fabrication.
Wherein, directly weld in dividing plate at described steam turbine, described standard stator blade 2, split stator blade 8 load described outer shroud 1 and described inner ring 3 by top locating slot 5, root locating slot 7 vertically, are fixed by welding.
As can be seen here, steam turbine of the present utility model directly welds dividing plate, stator blade two ends and dividing plate outer shroud, inner ring accurate positioning, easy installation and welding, simultaneously owing to there being the existence of locating slot, stator blade is after end face welding, also very large distortion can not be there is, ensure that the design parameter that in steam passage, stator blade lagging edge position degree, established angle, pitch and throat opening etc. are more important, and then ensure that the through-current capability of level group, improve the efficiency of steam turbine, and eliminate processes such as locating stator blade of ruling when stator blade and inner and outer rings welding equipment, thus simplify manufacture process.
Accompanying drawing explanation
Fig. 1 is the structural representation of tradition straight weldering dividing plate;
Fig. 2 is the structural representation of tradition straight weldering diaphragm stator blade;
Fig. 3 is the structural representation that steam turbine of the present utility model directly welds dividing plate;
Fig. 4 is the structural representation of lining standard stator blade of the present utility model;
Fig. 5 is the structural representation of dividing plate split stator blade of the present utility model;
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is described in further detail.
As in Figure 3-5, the utility model discloses a kind of steam turbine and directly weld dividing plate, comprise outer shroud 1, standard stator blade 2 or split stator blade 8 (selecting depending on actual demand), inner ring 3.Wherein, standard stator blade 2 or split stator blade 8 are bent blades, and standard stator blade 2 top is processed with boss 4, and root is processed with boss 6; Split stator blade 8 only root is processed with boss 6, and boss 4,6 and blade blade are die forging all-in-one-pieces from top to bottom.The root boss 6 of standard stator blade 2 or split stator blade 8 and the steam passage part of top boss 4 are cylndrical surface or conical surface, determine according to the meridian plane angle of steam passage part.
Outer shroud 1 is divided into upper and lower two halves, according to boss 4 position, stator blade 2 top and size, processes vane tip locating slot 5, and the locating slot 5 of the split stator blade 8 of outer shroud 1 correspondence is not processed, and outer shroud 1 is obtained by sheet fabrication.
Inner ring 3 is divided into upper and lower two halves, and according to position and the size of stator blade 2 and 8 root boss 6, process root locating slot 7, inner ring 3 is obtained by sheet fabrication.
During dividing plate erecting and welding, after stator blade 2,8 loads dividing plate outer shroud 1 and dividing plate inner ring 3 by top locating slot 5, root locating slot 7 vertically, with argon arc welding, stator blade top locating slot 5 and root locating slot 7 are welded, then weld with outer shroud 1, inner ring 3 along the upper and lower end face certain area of stator blade 2,8.
Steam turbine of the present utility model directly welds dividing plate relative to existing dividing plate, has following improvements:
(1) the top end face steam output side of stator blade is processed with boss, the steam passage part of boss is cylndrical surface or conical surface, root end face steam output side is also processed with boss, and the steam passage part of boss is cylndrical surface or conical surface, determines according to the meridian plane angle of steam passage part.
(2) outer shroud corresponds to leaf top lug boss position and is processed with locating slot, and the leaf top locating slot of corresponding split blade is not processed.
(3) inner ring corresponds to root of blade lug boss position and is processed with locating slot.
(4) (relative position between inner and outer rings locating slot is ensured) after using assembling-welding fixtures fixing inner and outer rings semi-circumference, from steam output side by blade locating slot loading vertically dividing plate, first with argon arc welding, locating slot region is welded after loading, make blade obtain preliminary location, and then the upper and lower end face of blade is welded.
Below in conjunction with specific embodiment, explanation is further elaborated to the technical solution of the utility model.
See Fig. 3, Fig. 4 and Fig. 5, steam turbine disclosed in the utility model directly welds dividing plate and comprises three parts: outer shroud 1, standard stator blade 2 (or split stator blade 8) and inner ring 3, processing separately separately, inner ring 3, outer shroud 1 Linear cut are divided into two halves, then respectively inner ring 3, outer shroud 1 are positioned to the processing of groove, standard stator blade 2 or split stator blade 8 are boss that die forging integrally processes root of blade and top.Detailed process is:
(1) first base substrate is processed to upper and lower two semicircles of outer shroud 1 and inner ring 3, and leave 10mm machining allowance at horizontal flange place; Then by the outer peripheral surface fine finishing of the inner peripheral surface of outer shroud 1 and inner ring 3, surface finishment is made to reach Ra3.2; And process locating slot 5 at outer shroud 1 inner circle steam output side, process locating slot 7 at inner ring 3 cylindrical steam output side, the surface finishment of locating slot and stator blade boss fitting surface reaches Ra3.2;
(2) semi-circumference of being processed the outer shroud 1 and inner ring 3 obtained by the first step is placed on centering on platform, ensures the relative position of outer shroud 1 and inner ring 3;
(3) insert standard stator blade 2 in locating slot 5 and 7 in the vertical direction, horizontal flange place inserts split stator blade 8, recheck inner ring 3, outer shroud 1 axially, circumferential position, fill technique lacing wire by between inner ring 3, outer shroud 1 after qualified, and positioning welding.Inner ring 3, outer shroud 1 assembly parts are stood up, checks that its relative position also installs steam admission side additional technique lacing wire and positioning welding after qualified;
(4) from split, each blade is pre-installed, according to actual conditions reconditioning length of blade along locating slot 5 and 7; Then split blade 8 good for reconditioning is positioned the argon arc welding tack welding of groove, then the back of the body arc end face of split blade 8 is welded; Then along split blade convexity direction welding equipment standard stator blade 2, the welding of weldering and back of the body arc both ends of the surface is positioned successively; Then workpiece is stood up, blade concavity both ends of the surface are welded, until whole pair of dividing plate blade welding equipment is complete;
(5) half disk spacer after having welded is carried out stress heat treatment;
(6) finally to dismantle assembling-welding fixtures on half disk spacer and technique lacing wire, the horizontal flange of double disk spacer carries out finish-milling, surface finishment reaches Ra3.2, then completes the processing of half other size of disk spacer according to drawing, finally completes the course of working of half disk spacer.
(7) the processing and assembling process of other half disk spacer and the same with upper semi-circle dividing plate, when upper and lower semiclapboard semicircle all processing and assembling well after, should ensure that the gap width at two and half disk spacers horizontal flange place is in a free state not more than 0.05mm.
On probation through experiment, stator blade two ends of the present utility model and dividing plate outer shroud, inner ring accurate positioning, be easy to erecting and welding, large distortion is not had after welding yet, ensure that the accurate of the more important design parameter such as stator blade lagging edge position degree, established angle, pitch and throat opening in steam passage, and then ensure that the through-current capability of level group, improve the efficiency of steam turbine, simplify manufacture process.
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a steam turbine directly welds dividing plate, it is characterized in that, this steam turbine directly welds dividing plate and comprises outer shroud (1), standard stator blade (2), split stator blade (8) and inner ring (3), and has blade locating slot on described outer shroud (1) and/or inner ring (3).
2. steam turbine according to claim 1 directly welds dividing plate, it is characterized in that, described standard stator blade (2) and split stator blade (8) are bent blades.
3. steam turbine according to claim 1 directly welds dividing plate, it is characterized in that, described standard stator blade (2) top is processed with top boss (4), and root is processed with root boss (6); Described split stator blade (8) only root is processed with root boss (6).
4. steam turbine according to claim 3 directly welds dividing plate, it is characterized in that, the blade of described top boss (4), root boss (6) and corresponding described standard stator blade (2) or split stator blade (8) is all die forging all-in-one-pieces from top to bottom.
5. steam turbine according to claim 3 directly welds dividing plate, it is characterized in that, the root boss (6) of described standard stator blade (2) and the steam passage part of top boss (4) are cylndrical surface or conical surface, determine according to the meridian plane angle of steam passage part;
The steam passage part of the root boss (6) of described split stator blade (8) is cylndrical surface or conical surface, determines according to the meridian plane angle of steam passage part.
6. steam turbine according to claim 1 directly welds dividing plate, it is characterized in that, described outer shroud (1) is divided into upper and lower two halves, when connection standard stator blade (2), according to described boss (4) position, standard stator blade (2) top and size, be processed with vane tip locating slot (5) in the upper correspondence of described outer shroud (1); When connecting split stator blade (8), undressed on described outer shroud (1) have top locating slot.
7. steam turbine according to claim 1 directly welds dividing plate, it is characterized in that, described outer shroud (1) is obtained by sheet fabrication.
8. steam turbine according to claim 1 directly welds dividing plate, it is characterized in that, described inner ring (3) is divided into upper and lower two halves, according to position and the size of described standard stator blade (2) and split stator blade (8) root boss (6), correspondence is processed with root locating slot (7).
9. steam turbine according to claim 1 directly welds dividing plate, it is characterized in that, described inner ring (3) is obtained by sheet fabrication.
10. steam turbine according to claim 1 directly welds dividing plate, it is characterized in that, directly weld in dividing plate at described steam turbine, described standard stator blade (2), split stator blade (8) load described outer shroud (1) and described inner ring (3) by top locating slot (5), root locating slot (7) vertically, are fixed by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520556189.2U CN204827560U (en) | 2015-07-28 | 2015-07-28 | Steam turbine directly welds baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520556189.2U CN204827560U (en) | 2015-07-28 | 2015-07-28 | Steam turbine directly welds baffle |
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| Publication Number | Publication Date |
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| CN204827560U true CN204827560U (en) | 2015-12-02 |
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| CN201520556189.2U Active CN204827560U (en) | 2015-07-28 | 2015-07-28 | Steam turbine directly welds baffle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109352132A (en) * | 2018-10-23 | 2019-02-19 | 哈尔滨汽轮机厂有限责任公司 | Control the method that inner and outer ring difference of height deforms after low pressure ring type partition welds |
| 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 |
-
2015
- 2015-07-28 CN CN201520556189.2U patent/CN204827560U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109352132A (en) * | 2018-10-23 | 2019-02-19 | 哈尔滨汽轮机厂有限责任公司 | Control the method that inner and outer ring difference of height deforms after low pressure ring type partition welds |
| 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 |
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