EP0054116B1 - Turbomachine stator assembly, and disassembling and assembling method therefor - Google Patents
Turbomachine stator assembly, and disassembling and assembling method therefor Download PDFInfo
- Publication number
- EP0054116B1 EP0054116B1 EP19810107994 EP81107994A EP0054116B1 EP 0054116 B1 EP0054116 B1 EP 0054116B1 EP 19810107994 EP19810107994 EP 19810107994 EP 81107994 A EP81107994 A EP 81107994A EP 0054116 B1 EP0054116 B1 EP 0054116B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diaphragm
- housing
- stator blade
- blade assembly
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
- F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/246—Fastening of diaphragms or stator-rings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- This invention generally relates to rotary machines, and more specifically to stator blade assemblies thereof.
- Occasionally, the rotor or stator blades of a rotary machine such as a compressor or expander must be removed from the machine for cleaning, maintenance, or replacement. For example, rotary machines are often used with fluids containing a significant amount of particulates or debris. Over an extended period, these particulates and debris may accumulate on or erode the blade surfaces, necessitating periodic removal of the rotor or stator blades from the machine to clean or replace the blade surfaces. Routine inspection and maintenance, for example to repair or realign a rotor seal or blade, may also require removal of the rotor or stator blades from the machine.
- Typically, in order to remove the rotor or stator blades from a rotary machine, a large portion of the machine must be disassembled; and many of the parts which must be disassembled are large, heavy, and thus difficult to maneuver. Moreover, when reassembled, usually these parts must be very accurately realigned. As a result, installing and removing the rotor and stator blades of a rotary machine requires skilled labor and may be relatively time consuming. Further, of course, the machine is inoperable and, hence, unproductive while the rotor and stator blades are being assembled and disassembled. Naturally, thus, it is desirable to simplify and assist the assembly and disassembly of the stator and rotor blades of a rotary machine.
- In addition to the foregoing, attention has been recently directed toward simplifying and facilitating the assembly and disassembly of entire rotary machines. One approach of considerable interest involves axially moving the rotor through a fluid casing of the rotary machine, with the fluid casing and other parts of the machine being designed so that this may be accomplished in a manner requiring relatively little disassembly of the rotary machine as a whole.
- This approach offers significant time and cost advantages. Obtaining these advantages with a multi-stage rotary machine having two or more axially spaced sets of rotor blades is complicated, though, by the fact that a stator blade assembly, generally including a plurality of stator blades and an interstage diaphragm, is usually axially located between the different rotor stages of the machine. The stator blade assembly, which is not movable with the rotor, must be removed before the rotor can be axially moved out of the machine.
- U.S. Patent 3,628,884 discloses a method of securing stator blades in a turbomachine for a different application. In the machine of U.S. Patent 3,628,884 a string is provided including a compressor and combustion section as well as a turbine. A large section of the turbine casing is removed to expose the turbine blades. Prior to removal certain bolts must be in the appropriate position. The turbomachine of the present invention is designed to facilitate assembly and servicing. To this end the rotor is removed axially from the machine. The structure of U.S. Patent 3,628,884 prevents axial displacement of the rotor due to the other contained components, furthermore the connecting means by which the relative position of the stator blade assembly is determined, are fixed directly to the outer casing.
- The present invention relates to a turbomachine having a stator blade assembly which may be easily installed in and removed from the turbomachine.
- According to the present invention there is provided a turbomachine including bladed rotor means having axially spaced first and second stage rotor blade rows; an inlet duct for directing a fluid past the bladed rotor means, a fluid casing for receiving fluid flowing past the bladed rotor means, and a stator blade assembly including stator blade means axially located between the first and second stage rotor blade rows, the inlet duct including an outwardly projecting duct flange; the fluid casing including an outwardly projecting casing flange; the stator blade assembly having outwardly projecting flanges positioned contiguous to the duct and casing flanges, and wherein there is provided means for releasably securing the stator blade assembly to the fluid casing and the inlet duct; the stator blade assembly further including a generally annular housing and a generally annular diaphragm disposed within the housing and supporting said stator blades, and further characterized in that the housing includes separable upper and lower housing sections and axially separable front and back sections; the diaphragm including separable upper and lower diaphragm sections; and connecting means including an annular rib portion radially projecting inward from the housing; characterized in that there is provided an annular band axially projecting from the annular rib portion; pin means radially extending through the annular band into engagement with the diaphragm; and means for releasably holding the pin means within the annular band. Optional features are set out in claim 2 below. An embodiment of the invention will now be described by way of example making reference to the accompanying drawings in which:
- Figure 1 is a side view, partially in cross section, illustrating portions of a rotary machine incorporating teachings of the present invention;
- Figures 1A, is a partial, side cross sectional view showing an alternate arrangement for disengageably supporting an interstage diaphragm and a plurality of interstage stator blades within the rotary machine shown in Figure 1;
- Figure 1B is an enlarged, side view, partially in cross-sectional, of a pin employed in the rotary machine shown in Figures 1 and 1A, to support releasably the interstage diaphragm and stator blades therein;
- Figure 2 is a front view, partially in cross section, of the stator blade assembly shown in Figure 1A;
- Figures 3 and 4 are front views showing lower sections of the stator blade assembly illustrated in Figure 2 of apparatus for installing these sections of the stator blade assembly in, and removing these sections of the stator blade assembly from, the rotary machine shown in Figure 1;
- Figure 5 is a partial side view of the rotary machine shown in Figure 1, including the lower sections of the stator blade assembly shown in Figure 2; and of the installation and removal apparatus shown in Figures 3 and 4.
- Referring to Figure 1, there is illustrated portions of
turbomachine 10 such as a multi-stage turbine incorporating teachings of the present invention.Machine 10 includes an axially extendingrotor 12, first and secondstage rotor blades inlet duct 18,fluid casing 20, andstator blade assembly 22.Assembly 22, in turn, compriseshousing 24,diaphragm 26,stator blades 30, and connectingmeans 32, discussed in greater detail below.Fluid casing 20 annularly extends aroundrotor 12, androtor blades rotor 12 and radially extend outward therefrom, forward to the left as viewed in Figure 1, of the fluid casing. Although two axially spaced sets ofrotor blades -
Housing 24 is located betweenfluid casing 20 andinlet duct 18 and annularly extends aroundrotor blades stator blades 30, anddiaphragm 26. With the embodiment illustrated in Figure 1,housing 24 is comprised of separable annular rings 34 and 36, and these rings are comprised of separable upper and lower sections, which preferably are both of semi-annular form disengageably joined together, for example by bolts, along adjacent horizontal flanges. More specifically, band 34 includestop section 34a andbottom section 34b, while band 36 includestop section 36a andbottom section 36b. Rings 34 and 36 are releasably joined together, tofluid casing 20, and toinlet duct 18. More particularly, in front, outwardly extendingflange portion 38 of band 34 is bolted tocontiguous flange portion 40 ofinlet duct 18; back, outwardly extendingflange portion 42 of band 36 is bolted tocontiguous flange portion 44 offluid casing 20; and bands 34 and 36 are bolted together along adjacent,intermediate flanges inlet duct 18,fluid casing 20, andhousing 24 to inhibit or to retard fluid flow between these surfaces. -
Diaphragm 26 is disposed withinhousing 24 and preferably is radially spaced therefrom to allow radial expansion and contraction of the diaphragm.Diaphragm 26 annularly extends aroundrotor blades lower diaphragm sections Stator blades 30 are secured todiaphragm 26 in any conventional manner and radially extend inward therefrom, betweenrotor blade rows split sealing member 54 is conventionally secure tostator blades 30 and radially extends inward therefrom substantially to impellerrotor 12 to inhibit fluid flow through the area between the rotor and the stator blades. - Connecting means 32 releasably connects
diaphragm 26 tohousing 24 and limits relative rotation therebetween. With the embodiment illustrated in Figure 1, connectingmeans 32 includes insiderib portion 56 of housing band 36,annular ring 58, and one ormore pins 60.Ring 58, which may be integral withrib 56, axially extends from the rib, radially outsidediaphragm 26, andpins 60 extend throughring 58 into engagement withdiaphragm 26 to prevent substantially relative rotation between the diaphragm andring 58. - Preferably,
ring 58 defines a plurality ofpin holes 62, for example 8 or 12 equally spaced about the ring;diaphragm 26 defines a like number ofdiaphragm sockets 64, withsockets 64 aligned withpin holes 62; andpins 60 extend throughholes 62 and intosockets 64 to engage securely the diaphragm. In order to prevent inadvertent outward movement ofpins 60, setscrews 66 may be threaded intodiaphragm 26 to engage cooperating annular recesses (not shown) ofpins 60, releasably maintainingpins 60 in position, as shown in Figure 1. With reference to Figure 1B, upper portions ofpins 60 may define threadedpin sockets 68 to facilitate moving the pins into and out ofdiaphragm sockets 64. - With the above-described arrangement, abutting contact between
pins 60 and the surfaces ofring 58 definingpin holes 62 substantially prevents rotational or axial movement ofdiaphragm 26. Rearward axial movement ofdiaphragm 26 is further prevented byrib 56 or, preferably, by a seal (not shown) which may be axially located betweenrib 56 and outside flange 70 of the diaphragm. At the same time,rib 56 provides radial support fordiaphragm 26 withinhousing 24. Thus,diaphragm 26 andstator blades 30 are supported and largely held in place withinhousing 24, althoughpins 60 allow and, in fact, guide radial expansion and contraction of the diaphragm. - Referring to Figure 1A, there is disclosed a second embodiment for supporting
diaphragm 26 andstator blades 30 withinhousing 24. With this embodiment,housing 24 may form an integral portion ofinlet duct 18, and preferably the housing comprises an integral bandportion encircling diaphragm 26 andstator blades 30. With the embodiment shown in Figure 1A,diaphragm 26 andstator blades 30 are supported withinhousing 24 via insiderib portion 80 offluid casing 20,annular ring 82, and one ormore pins 60.Annular ring 82 is separable fromrib portion 80, and preferably is bolted thereto. Similar to the arrangement illustrated in Figure 1,ring 82 preferably defines a plurality ofpin holes 62, withpins 60 extending through these holes and intodiaphragm sockets 64, and setscrews 66 may be used to maintain releasablypins 60 insockets 64. - To operate
machine 10, a fluid is induced to flow throughinlet duct 18 andpast blades machine 10 is a compressor, thenrotor blade rows machine 10 is an expander, then the fluid causes rotation ofblade rows past blades fluid casing 20, and thence is discharged frommachine 10. - As previously discussed, attention has been recently directed towards simplifying the assembly and disassembly of rotary machines of the general type described above, specifically of the stator blade assemblies thereof; and in accordance with the teachings of the present invention,
stator blade assembly 22 described above may be both removed from and installed inmachine 10 in a relatively fast and inexpensive manner. - With the embodiment depicted in Figure 1, top and
bottom sections inlet duct 18 and housing band 36, and band 34 is removed frommachine 10. Set screws 66 are loosened or removed and pins 60 are pulled out ofdiaphragm sockets 64, freeing housing band 36 fromdiaphragm 26. Top andbottom sections housing 24 thus removed, top andbottom sections diaphragm 26 are disengaged from each other and taken away frommachine 10. - A major advantage of the embodiment illustrated in Figures 1, it should be pointed out, is that the entire
stator housing assembly 22 may be removed without removing eitherinlet duct 18 orfluid casing 20. - Turning now to Figure 1A, to disassemble
stator blade assembly 22 shown therein,flanges housing 24 andinlet duct 18 fromfluid casing 20.Inlet duct 18, includingannular housing portion 24, is then removed. Set screws 66 are loosened or removed, and then pins 60 are removed.Ring 82 is then disconnected fromrib 80 and removed. Top andbottom sections diaphragm 26 are then disengaged from each other and radially moved out ofmachine 10. - As will be appreciated by those skilled in the art, numerous specific apparatus may be utilized to remove
stator blade assembly 22 frommachine 10, and one arrangement for removing and installing thestator blade assembly 22 shown in Figure 1B will be described herein in detail. With particular reference to Figures 2 and 3, to remove thestator blade assembly 22,posts 102, includingsupport platforms 104 andtop flanges 106, are positioned adjacent to the stator blade assembly, withtop flanges 106 overlaying portions offlanges 108 oflower housing section 24b.Flanges posts 102 provide additional support forstator blade assembly 22. Preferably, guiderods 110 are lowered through aligned apertures defined byflanges support platforms 104, wherein the guide rods help to guide vertical movement oflower diaphragm section 52 andlower housing section 24b. Withposts 102 providing support forstator blade assembly 22,inlet duct 18 is disengaged from the stator blade assembly and removed in any suitable manner, for example by an overhead crane.Pins 60 connecting upper diaphragm section withupper housing section 24a are removed, freeing this housing section fromdiaphragm 26.Upper housing section 24a is then disengaged fromlower housing section 24b and fromfluid casing 20 and removed in any conventional manner, again for example by an overhead crane.Upper diaphragm section 50 is then disengaged fromlower diaphragm section 52 and also removed in any conventional manner such as by an overhead crane. -
Rails 112 are positionedadjacent machine 10, extending forward thereof betweenposts 102.Screw jacks 114, havingtop plates 116, are placed onplatforms 104 ofposts 102, and the screw jacks are extended to bringplates 116 into abutting contact withflanges 108 oflower housing section 24b.Lower housing section 24b is disengaged fromfluid casing 20, andflanges 108 are disengaged fromflanges 106. Lower housing anddiaphragm sections screw jacks 114,plates 116,housing section 24b, anddiaphragm section 52 are lowered towardrails 112. Beforehousing section 24b engagesrails 112, wheels 120,122, and 124 are secured to the lower housing section in any suitable manner to supportdiaphragm section 52 andhousing section 24b for movement along the rails. With wheels 120,122, and 124 secured in place,screw jacks 114 are retracted to lower these wheels ontorails 112, as shown in Figures 4 and 5. It should be pointed out that preferablymachine 10 andrails 112 are positioned on a baseplate having a recessed or lowered central portion, allowing the bottom ofhousing section 24b to extend lower than the bottom ofrails 112 whenwheels rails 112, guiderods 110 are removed, andhousing section 24b anddiaphragm section 52 are then manually moved along the rails, away frommachine 10.Housing section 24b anddiaphragm section 52 may thence be transported to a remove location in any conventional manner. Once removed frommachine 10, pin covers 72 and pins 60 connectinglower housing section 24b with thelower diaphragm section 52 may be removed, separatingsections - To install
stator blade assembly 22, the above-described removal process is generally reversed.Lower diaphragm section 52, with a plurality ofstator blades 30 secured thereto and radially extending inward therefrom and with the lower half of sealingmember 54 secured to and radially extending inward from these stator blades is positioned withinlower housing section 24b, slightly spaced therefrom. Diaphragm andhousing sections pins 60 and intodiaphragm sockets 64.Wheels housing section 24b. Diaphragm andhousing sections rails 112 and moved therealong until the lower diaphragm and housing sections are adjacentfluid casing 20 and belowrotor 12, as shown in Figure 5. -
Posts 102 are located outside rails 112, withflanges 108 oflower housing section 24b directly betweensupport platforms 104 andtop flanges 106.Guide rods 110 are inserted throughflanges Screw jacks 114 are positioned onplatforms 104 and extended to bringplates 116 into abutting contact withflanges 108 and raiselower housing section 24b off rails 112.Wheels lower housing section 24b.Screw jacks 112 are extended to raisehousing section 24b anddiaphragm section 52 into their assembled positions and bringflanges 108 into abutting contact withtop flanges 106.Flanges rods 110 are removed, andlower housing section 24b is disengageably secured tofluid casings 20.Rails 112 may be removed. -
Upper diaphragm section 50, also with a plurality ofstator blades 30 secured thereto and with the upper half of sealingmember 54 secured to these stator blades, is positioned, for example via an overhead crane, overlower diaphragm section 52 androtor 12, and the upper and lower diaphragm sections are disengageably secured together, formingdiaphragm 26.Upper housing section 24a is positioned overdiaphragm 26, again for example by an overhead crane, and disengageably secured to bothlower housing section 24b andfluid casing 20. Upper diaphragm andhousing sections pins 60,inlet duct 18 is resecured to the front ofhousing 24, and preferably support means (not shown) is secured toinlet duct 18 to support the duct and to provide additional support forstator blade assembly 22 and the forward end offluid casing 20. With this additional support,flanges 106 ofposts 102 are disengaged fromflanges 108 ofhousing 24, and the posts andscrew jacks 114 are removed.Stator blade assembly 22 is now reassembled withinmachine 10 and the machine is ready for operation.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20209180A | 1980-10-30 | 1980-10-30 | |
US202091 | 1980-10-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0054116A1 EP0054116A1 (en) | 1982-06-23 |
EP0054116B1 true EP0054116B1 (en) | 1986-09-10 |
Family
ID=22748465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810107994 Expired EP0054116B1 (en) | 1980-10-30 | 1981-10-06 | Turbomachine stator assembly, and disassembling and assembling method therefor |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0054116B1 (en) |
JP (1) | JPS5925092B2 (en) |
DE (1) | DE3175308D1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6224332B1 (en) * | 1999-05-14 | 2001-05-01 | General Electric Co. | Apparatus and methods for installing, removing and adjusting an inner turbine shell section relative to an outer turbine shell section |
US6287091B1 (en) * | 2000-05-10 | 2001-09-11 | General Motors Corporation | Turbocharger with nozzle ring coupling |
GB0811501D0 (en) * | 2008-06-24 | 2008-07-30 | Rolls Royce Plc | A Method of forming a blade assembly |
RU2451793C1 (en) * | 2010-12-20 | 2012-05-27 | Открытое акционерное общество "Авиадвигатель" | Gas turbine engine turbine |
DE102012211950A1 (en) * | 2012-07-09 | 2014-05-08 | Abb Turbo Systems Ag | exhaust turbine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1692537A (en) * | 1923-08-02 | 1928-11-20 | Westinghouse Electric & Mfg Co | Elastic-fluid turbine |
GB679916A (en) * | 1949-04-29 | 1952-09-24 | Geoffrey Bertram Robert Feilde | Improvements in gas turbines |
US2828105A (en) * | 1955-07-28 | 1958-03-25 | Vickers Armstrongs Ltd | Turbines |
US2960306A (en) * | 1956-01-16 | 1960-11-15 | Gen Motors Corp | Turbine |
DE1045177B (en) * | 1956-03-27 | 1958-11-27 | Maschf Augsburg Nuernberg Ag | Multi-stage, axial flow turbomachine with high working medium temperatures, in particular gas turbine |
US3169748A (en) * | 1962-12-06 | 1965-02-16 | Westinghouse Electric Corp | Turbine apparatus |
US3628884A (en) * | 1970-06-26 | 1971-12-21 | Westinghouse Electric Corp | Method and apparatus for supporting an inner casing structure |
-
1981
- 1981-10-06 DE DE8181107994T patent/DE3175308D1/en not_active Expired
- 1981-10-06 EP EP19810107994 patent/EP0054116B1/en not_active Expired
- 1981-10-29 JP JP17219181A patent/JPS5925092B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5925092B2 (en) | 1984-06-14 |
DE3175308D1 (en) | 1986-10-16 |
JPS57105504A (en) | 1982-07-01 |
EP0054116A1 (en) | 1982-06-23 |
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