NO115883B - - Google Patents
Info
- Publication number
- NO115883B NO115883B NO16693667A NO16693667A NO115883B NO 115883 B NO115883 B NO 115883B NO 16693667 A NO16693667 A NO 16693667A NO 16693667 A NO16693667 A NO 16693667A NO 115883 B NO115883 B NO 115883B
- Authority
- NO
- Norway
- Prior art keywords
- spring
- plate
- bolts
- wheel
- intermediate plate
- Prior art date
Links
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 6
- 210000000056 organ Anatomy 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Description
Løsbar forbindelse for en polhjulkrans på hjulstjernen for en stor elektrisk maskin,med vertikal akse. Detachable connection for a pole wheel ring on the wheel star for a large electric machine, with vertical axis.
Den foreliggende oppfinnelse vedrdrer en lett losbnr forbindelse for en polhjulkrans på hjulstjernen for en stor elektrisk maskin The present invention relates to an easily detachable connection for a pole wheel ring on the wheel star of a large electric machine
med vertikal akse.with vertical axis.
Det er fra for kjent å krympe polhjulkranser for store elektriske maskiner på hjulstjernen sLik at de blir sittende fast p'' hjui-stjernen selv ved overturtall-omdreining og fullast-utkobling. Polhjulkransen er således sikret en utmerket stiLling i forhold til akselens akse. Pakrympingen kan oppnåes ved oppvarming av polhjulkransene eller ved hjelp av en fastkilingsMnordning. De It is already known to shrink pole wheel rims for large electric machines on the wheel star so that they are stuck on the wheel star even during overspeed rotation and full load cut-off. The pole wheel rim is thus ensured an excellent position in relation to the axis of the axle. The shrinking of the pack can be achieved by heating the pole wheel rims or by means of a wedging device. The
krefter som derved oppstår mellom polhjulkransene og hjulstjernearmene kan bli betydelige og det samme gjelder påkjenningen på forces that thereby arise between the pole wheel rims and the wheel star arms can become significant and the same applies to the stress on
hjulstjernearmene, slik at det i mange tilfelle er nodvend ig å forsterke polhjulstjernen. Dette er spesielt tilfelle ved skjermrotorer med vertikal akse, og krympingen medfbrer derved store boyningspåkjenninger på hjulstjernearmene. For å unngå dette og dessuten spare arbeid og omkostninger ved påkrymping eller fastkiling er det onskelig helt å unngå denne påkrymping eller fastkiling. the wheel star arms, so that in many cases it is necessary to reinforce the pole wheel star. This is particularly the case with screen rotors with a vertical axis, and the shrinkage thereby entails large bending stresses on the wheel star arms. In order to avoid this and also to save work and costs when shrinking or wedging, it is desirable to completely avoid this shrinking or wedging.
Videre er det ved vertikale elektriske maskiner (turbiner eller pumpegrupper) onskelig at polhjulkransene til enhver tid skal kunne skilles fra hjulnavene. Dette muliggjbres ved anordning av en mindre krans som bare må dimensjoneres for rotorens tyngste enkeltdeler, d.v.s. for polhjuLkransen, hjulstjernen, akselen og turbinhjulet. De hjulkranser som er fjernet fra hjulstjernen, samt polene anbringes derved på avstbtningsspindler i maskinen. Det bor også være mulig å lofte ut hele turbinhjulet uten at også polhjulkransen må loftes ut. Furthermore, with vertical electrical machines (turbines or pump groups) it is desirable that the pole wheel rims should be able to be separated from the wheel hubs at all times. This is made possible by the arrangement of a smaller ring which only needs to be dimensioned for the rotor's heaviest individual parts, i.e. for the pole wheel ring, wheel star, axle and turbine wheel. The wheel rims that have been removed from the wheel star, as well as the poles, are thereby placed on the support spindles in the machine. It should also be possible to lift out the entire turbine wheel without also having to lift out the pole wheel rim.
Oppfinnelsen består i at overgangen mellom hver hjulstjernearms endeplate og polhjulkranser skjer via en meliomplate og en fjærplate som er kraftoverfbrbart forbundet med polhjulkransen, at det er en klaringsavstand mellom mellomplatene og fjærplaten, at det er anordnet radialt forskyvbare fjærfbringsbolter som gjennomtrenger fjærplaten og at det konsentrisk med boltene i boringer i fjærplaten er anordnet trykkfjærer som presser fjærforingsboltene mot mellomplaten og at det er anordnet organer for å forskyve fjær foringsboltene radialt utover under sammenpresning av trykk fjærene, og at fjærfbringsboltenes ender er utstyrt med riller hvor det kan skyves inn lasker slik at fjærfdringsboltenes tilbakeglidning hindres, noe som trykkavlaster mellomplaten og frigir denne med klaring slik at den kan trekkes ut. The invention consists in the fact that the transition between the end plate of each wheel star arm and the pole wheel rings takes place via a meliom plate and a spring plate which is connected to the pole wheel ring in a power-transmissible manner, that there is a clearance distance between the intermediate plates and the spring plate, that radially displaceable spring bearing bolts are arranged which penetrate the spring plate and that concentrically with the bolts in bores in the spring plate are provided with pressure springs which press the spring lining bolts against the intermediate plate and that there are organs arranged to displace the spring lining bolts radially outwards during compression of the pressure springs, and that the ends of the spring lining bolts are equipped with grooves where tabs can be pushed in so that the spring lining bolts slide back is prevented, which relieves pressure on the intermediate plate and releases it with clearance so that it can be pulled out.
Den foreliggende oppfinnelse skal nærmere beskrives ved hjelp av utforelseseksepler under henvisning til de vedlagte tegninger, hvorpå The present invention shall be described in more detail by means of exemplary embodiments with reference to the attached drawings, after which
fig. 1 viser den losbare forbindelse i et polhjulplan ifblge den foreliggende oppfinnelse, fig. 1 shows the detachable connection in a pole wheel plane according to the present invention,
fig. la viser en detalj,fig. let shows a detail,
fig. 2 viser en lask ogfig. 2 shows a lask and
fig. 3 viser den lbsbare forbindelse i en annen utfbrelse.fig. 3 shows the removable connection in another embodiment.
I fig. 1 betegner 1 et utsnitt av polhjulkransen for en stor elektrisk maskin, vist i et hjuiplan. 2 betegner en arm på hjulÆjernen. Hver hjulstjernearm har en ldsbar forbindelse med polhjulkransen. For overgangen fra hjulstjernearmen med sin endeplate 3 til polhjukransen er det anordnet en mellomplate 5. og en fjærplate 4. Mellomplaten utgjor det egentlige organ for den lbsbare forbindelse. Fjærplaten er T-formet og er med sitt svalehaleformede midtparti hb fastklemt i et tilsvarende profi-lert spor i polhjulkransen. For dette formål er det langs sporet anordnet innleggbare stålkiler 20 og 21. Kilene er rettet mot hverandre. Ved å slå disse kiler inn fra den ene eller begge sider av polhjulkransen oppnåes en stiv fastklemming av mellom-stykket på fjærplaten med polhjulkransen. Derved unngåes ulike påkjenninger på trykk fjæren 7 på grunn av dreiemomentet. Mellom fjærplaten og mellompLaten er det en klaringsavstand a. Radialt forskyvbare fjærfaringsbolter 6 ligger an mot mellomplaten. Boltene gjennomtrenger fjærplaten h . Konsentrisk med fjærfbrings-boltene og innenfor avsa ts forsynte boringer<!>ia i fjærplaten er det anordnet skålfjærer 7 som trykkfjærer. Disse fjærer utover krefter som presser mellomplaten og fjærplaten fra hverandre, idet mellomplaten 5 presses mot hjulstjernearmens endeplate 3-Disse fjærers trykk er meget stort av sikkerhetsgrunner. På denne måte skal eventuelle skjevheter i mulig deformasjon av rotorkransen, f.eks. på grunn av ujevn fordeling av friksjons-kreftene på glideflatene 11 mellom endeplatene 3 og de anliggende lister (se nedenfor) 12 holdes pci st minimum. In fig. 1 denotes a section of the pole wheel ring for a large electric machine, shown in a top plane. 2 denotes an arm of the wheel iron. Each wheel star arm has a weldable connection with the pole wheel ring. For the transition from the wheel star arm with its end plate 3 to the pole angle ring, an intermediate plate 5 and a spring plate 4 are arranged. The intermediate plate forms the actual organ for the removable connection. The spring plate is T-shaped and with its dovetail-shaped central part hb is clamped in a correspondingly profiled groove in the pole wheel rim. For this purpose, insertable steel wedges 20 and 21 are arranged along the track. The wedges are directed towards each other. By driving these wedges in from one or both sides of the pole wheel rim, a rigid clamping of the intermediate piece on the spring plate with the pole wheel rim is achieved. This avoids various stresses on the pressure spring 7 due to the torque. Between the spring plate and the intermediate plate there is a clearance distance a. Radially displaceable spring bearing bolts 6 rest against the intermediate plate. The bolts penetrate the spring plate h . Concentrically with the spring bearing bolts and within the provided bores <!>ia in the spring plate, cup springs 7 are arranged as compression springs. These springs beyond forces that push the intermediate plate and the spring plate apart, as the intermediate plate 5 is pressed against the end plate of the wheel star arm 3-The pressure of these springs is very large for safety reasons. In this way, any biases in possible deformation of the rotor rim, e.g. due to the uneven distribution of the frictional forces on the sliding surfaces 11 between the end plates 3 and the adjacent strips (see below) 12 is kept to a minimum.
Videre er det anordnet organer for å skyve fjærforingsboltene 6 radialt utover under sammenpressing av skålfjærene 7. Denne forskyvning er nbdvendig for i fors te omgang og senere ved overhaling å kunne bringe polhjuls tjernen og polhjulkransen i en inn-byrdes' konsentrisk stilling under opprettholdelse avKlaringsav-standen, slik et den gjensidige fastspenning av polhjulkransen på polhjulstjernen finner sted»'r tallerkenfjærenes sammenpressing senere reduseres samtidig som meliomplatene presses mot endeplatene. Men for denne fastspenning kan finne sted, må fjærforingsboltene kunne holdes i en radialt utoverskjovet stilling. For dette formål er fjærferingsboltene 6 utstyrt med riller 6a. Når begge bolter for hver hjulstjernearm er forskjo-vet utover og rillenes 6a nedre kant ligger fritt i plan med fjærplatens overside, som vist på hbyre side av fig. 1, skyves det hver sin lask 10 med U-formet utskjæring tilsvarende rillene 6a (fig. 2) inn i disse i polakseretning. Når boltene 6 slippes, vil fjærene 7 presse boltene radialt innover. De sistnevnte beveger seg noe tilbake og blir deretter hengende i laskene med en klaringsavstand a mot mellomplaten 5. Ved denne stilling av fjærforingsboltene er polhjulkransen lbsnet fra polhjulstjernen. Den lbsbare forbindelse er åpen. Hjuls tjernene kan nå lbftes ut vertikalt mens polhjulkransen blir igjen eller omvendt. Furthermore, organs are arranged to push the spring liner bolts 6 radially outwards while compressing the cup springs 7. This displacement is necessary in order initially and later during overhaul to be able to bring the pole wheel star and the pole wheel rim into a mutually concentric position while maintaining clearance the stand, as the mutual clamping of the pole wheel rim on the pole wheel star takes place"'r the compression of the disc springs is later reduced at the same time as the melioma plates are pressed against the end plates. But for this clamping to take place, the spring lining bolts must be able to be held in a radially outwardly displaced position. For this purpose, the spring suspension bolts 6 are equipped with grooves 6a. When both bolts for each wheel star arm are displaced outwards and the lower edge of the grooves 6a lies freely flush with the upper side of the spring plate, as shown on the right side of fig. 1, each flap 10 with a U-shaped cutout corresponding to the grooves 6a (fig. 2) is pushed into them in the polar axis direction. When the bolts 6 are released, the springs 7 will push the bolts radially inwards. The latter move somewhat back and then become suspended in the tabs with a clearance distance a against the intermediate plate 5. In this position of the spring lining bolts, the pole wheel rim is detached from the pole wheel star. The loadable connection is open. The wheel hubs can now be lifted out vertically while the hub wheel rim remains or vice versa.
For at man f.eks., ved overhaling og i en maskin som er montert, sammen med turbinen, skal kunne losne forbindelsen mellom polhjulkransen og hjulstjernen, er det ifblge fig. 1 i hjulstjernens endeplater anordnet lofteskruer 9. Ved å skru disse skruer i retning bort fra rotoraksen, lbftes fjærforingsboltene 6 inntil rillene oa ligger fritt og laskene 10 kan skyves på. Deretter skrues skruene 9 tilbake, tas ut og skrues inn i en annen arm hvor samme forskyvning gjentas. In order, for example, during overhaul and in a machine that is mounted together with the turbine, to be able to loosen the connection between the pole wheel ring and the wheel star, according to fig. 1 in the end plates of the wheel star arranged ceiling screws 9. By screwing these screws in a direction away from the rotor axis, the spring lining bolts 6 are loosened until the grooves oa are free and the tabs 10 can be pushed on. The screws 9 are then screwed back, taken out and screwed into another arm where the same displacement is repeated.
Fjærplatene har fremspring ho hvor settskruer 8 og 15 er tangensialt anordnet. De overforer maskinens dreiemoment. Derved presses settskruene mot lister 12 som ligger planparallelt med hjulstjernearmen og som på siden er i anlegg mot endeplatene 3. Presslistene fastholdes av påsveisede, tangensialt forskyvbare bolter 13 (fig. la) mot radial forskyvning. Boltene er anordnet i flukt med og mellom settskruene. Under drift ligger settskruene 8 og 15 og listene 12 i anlegg uten klaring og med en viss for-spenning. For å losne forbindelsen dreies de tilbake. Listene 12 kan på glideflater 11 utfore forskyvninger overfor hjulstjernearmene, slik det er normalt ved store maskiner. Forskyvninger av dette slag kan utgjore noen millimeter på grunn av The spring plates have protrusions where set screws 8 and 15 are arranged tangentially. They transmit the machine's torque. Thereby, the set screws are pressed against strips 12 which lie parallel to the wheel star arm and which on the side are in contact with the end plates 3. The press strips are held by welded-on, tangentially displaceable bolts 13 (fig. la) against radial displacement. The bolts are arranged flush with and between the set screws. During operation, the set screws 8 and 15 and the strips 12 are in contact without clearance and with a certain pre-tension. To loosen the connection, they are turned back. The strips 12 can, on sliding surfaces 11, carry out displacements against the wheel star arms, as is normal for large machines. Displacements of this kind can amount to a few millimeters due to
polhjulkranesene som folge av,sentrifugalkrefter.the pole wheel cranes as a result of centrifugal forces.
Til tross for denne forskyvning i glideflatene foreligger det en tilfredsstillende forbindelse for dreiemomentoverfbring mellom hjulstjernearmene og fjærplatene og dermed polkransen. Despite this displacement in the sliding surfaces, there is a satisfactory connection for torque transmission between the wheel star arms and the spring plates and thus the pole ring.
Ved store kransdiametre og hbye kranspåkjenninger, spesielt ved overturtallsomdreining ved fulLast-utkobling, vil kransene på den ene side lbfte seg 2 tii 3 mm fra hjulstjernearmen. Klarings-avstanden a vil således forstbrres med 2-3 mm. Hvis en maskin daglig settes i gang flere ganger, f.eks. i et kraftverk, for toppbelastning, kunne glideflatene 11 med tiden slites ned slik at kransenes sentrering iike lengre var sikret. Ved etter-justering av skruene 8 kan dette korrigeres. For å holde sli-tasjen innen rimelige grenser behandles glideflatene med et fast glidemiddel, f.eks. molybdensulfidpulver. Hullene i frem-springene h c har en liten klaing for at fbrin<g>slistene 12 ved demontering skal kunne skyves tilbake. De gjengebolter 15 som er anordnet på motsatt side av skruene 8, kan sveises fast ved monteringen. In the case of large rim diameters and high rim stresses, especially during overspeed rotation at full load cut-out, the rims on one side will lift 2 to 3 mm from the wheel star arm. The clearance distance a will thus be increased by 2-3 mm. If a machine is started several times a day, e.g. in a power plant, for peak load, the sliding surfaces 11 could eventually wear down so that the centering of the flanges was no longer ensured. This can be corrected by post-adjusting the screws 8. To keep the wear within reasonable limits, the sliding surfaces are treated with a solid lubricant, e.g. molybdenum sulfide powder. The holes in the protrusions h c have a small gap so that the fbrin<g>slists 12 can be pushed back during disassembly. The threaded bolts 15 which are arranged on the opposite side of the screws 8 can be welded in place during assembly.
Fig. 3 viser et utfbrelseseksempel hvor melLomplaten .5 er utfort dobbelt T-formet..Den er skrudd fast på endeplaten 3 slik at flatens forholdsvis store sentrifugalkraft ikke skal bety noen ek-stra belastning for fjærene. Glideflatene 11 befinner seg på planparallelle sider av fjærplaten k. Den stbrste tykkelse av mellomplaten gir mer klaring ved demontering av hjulstjernen overfor kranspartiene. Fig. 3 shows a design example where the middle plate 5 is extended double T-shaped. It is screwed onto the end plate 3 so that the relatively large centrifugal force of the surface should not mean any extra load for the springs. The sliding surfaces 11 are located on plane-parallel sides of the spring plate k. The greater thickness of the intermediate plate provides more clearance when disassembling the wheel star opposite the crane parts.
I stedet for skruene 9 som krever adskillig tid for inn- og ut-skruing, kan det benyttes hydrauliske anordninger fer ibfting av fjærforingsboltene. Instead of the screws 9, which require a lot of time for screwing in and out, hydraulic devices can be used for attaching the spring lining bolts.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH249266A CH431687A (en) | 1966-02-21 | 1966-02-21 | Detachable connection for a rotor ring on the wheel spider of a large vertical-axis electrical machine |
Publications (1)
Publication Number | Publication Date |
---|---|
NO115883B true NO115883B (en) | 1968-12-23 |
Family
ID=4235013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO16693667A NO115883B (en) | 1966-02-21 | 1967-02-20 |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT260348B (en) |
CH (1) | CH431687A (en) |
FR (1) | FR1511959A (en) |
NO (1) | NO115883B (en) |
SE (1) | SE341028B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2831123B1 (en) * | 1978-07-12 | 1979-11-08 | Siemens Ag | Synchronous electric machine, especially large-diameter hydro power generator |
FR2435145A1 (en) * | 1978-08-31 | 1980-03-28 | Vinogradov Evgeny | Rotor lamination support for vertical hydro generator - has rim with poles connected to wedge strips with horizontal transverse slots and supports |
DE102020113625A1 (en) * | 2020-05-20 | 2021-11-25 | Voith Patent Gmbh | Rotor for an electric machine |
DE102021210755A1 (en) * | 2021-09-27 | 2023-03-30 | Siemens Energy Global GmbH & Co. KG | Rotor for electric rotating machine, electric rotating machine, nacelle propulsion and watercraft |
-
1966
- 1966-02-21 CH CH249266A patent/CH431687A/en unknown
- 1966-11-28 AT AT1096666A patent/AT260348B/en active
-
1967
- 1967-02-20 NO NO16693667A patent/NO115883B/no unknown
- 1967-02-20 FR FR95579A patent/FR1511959A/en not_active Expired
- 1967-02-20 SE SE231167A patent/SE341028B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
AT260348B (en) | 1968-02-26 |
SE341028B (en) | 1971-12-13 |
CH431687A (en) | 1967-03-15 |
FR1511959A (en) | 1968-02-02 |
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