SE203715C1

SE203715C1 -

Info

Publication number: SE203715C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: F Gaze Prioritet begtird frost den 30 juni 1961 (Forbundsrepubliken Tgskland) Ett tekniskt och ekonomiskt tillfredsstallande utforande pa en elektrisk maskin innebar awn, att dess lager i sa stor utstrackning som mojligt anpassa sig efter driftsbetingelserna. Kanda och utforda segmentstodlager vid vattenkraftsgeneratorer utmarka sig genom foljande egenskaper: De ombesiirja sjalva den erforderliga oljecirkulationen. De aro darfOr oberoende av separat tillfOrd strom och extra utanfor dem liggande anordningar. De bilda genast vid starten ett sammanhangande oljeskikt och behova darfor icke avlastas efter driftsbetingade stillestand. De arbeta med ostort oljeskikt aven vid de lagsta vary:. tal, uppvisa alltsâ knappast nagot slitage och skadas icke genom att maskinen tillfalligt far lopa utan bromsning. De aro inom ett stort omrade oberoende av belastningens storlek och aro darfor aven val lampade fOr drift vid lagbelastning och drift med stor fasforskjutning. De ha aven vid granstemperaturer hog driftssakerhet och tala darfor termiska Overbelastningar genom temporara blister i kylvattenforsorjningen. Inventor: F Gaze Priority frozen on 30 June 1961 (Federal Republic of Germany) A technically and economically satisfactory design of an electric machine meant that its bearings, as far as possible, adapted to the operating conditions. Know and challenge segment support bearings at hydropower generators stand out through the following characteristics: They themselves provide the required oil circulation. They are therefore independent of a separate supply of power and extra devices lying outside them. They form a coherent oil layer immediately at the start and therefore do not need to be relieved after operational downtime. They work with undisturbed oil layers even at the lowest vary. speech, thus hardly show any wear and is not damaged by the machine being allowed to run temporarily without braking. They are in a large area regardless of the size of the load and are therefore also suitable for operation at team load and operation with large phase shift. They also have high reliability at spruce temperatures and therefore speak of thermal overloads through temporary blisters in the cooling water supply.

Dessa egenskaper sammanhanga i stor utstrackning med de hydrodynamiska forloppen i lagret, utforandet av stodsegmenten, speciellt dessas underlag, anvandningen av en sarskilt lamplig lagermetall med hog varmebestandighet och den konstruktiva utformningen av alla lagerdelar. These properties are largely related to the hydrodynamic processes in the bearing, the design of the support segments, especially their substrates, the use of a particularly suitable bearing metal with high heat resistance and the constructive design of all bearing parts.

Segmentstlidlager med hydrodynamisk smorjning fOr konst ant rotationsriktning dimensioneras pa sadant satt, att stodsegmentens vippunkt i vridningsriktningen ligger med viss fOrskjutning frail mittlinjen. Dan genom sakerstalles en sakrare start och samtidigt lagre friktionsforluster. Segment bearing bearings with hydrodynamic lubrication for art in the direction of rotation are dimensioned in such a way that the pivot point of the stud segments in the direction of rotation is with a certain displacement from the center line. Dan through sakertalles a safer start and at the same time lower friction losses.

Vid pumpturbinsatser for pumpkraftverk kan det emellertid forekomma, att vid pumpdriftens slut genom pumpvattnets aterflode vridningsriktningen overgaende kastas om. En utrustning av dylika anlaggningar med fOr endast en vridningsriktning optimalt dimensionerade segmentstodlager skulle medfora en icke driftssaker igangsattning i backriktning, en. Darfor ha stodsegment med ett vid mittlinjen anordnat stod foreslagits, vilka darvid tillika med avslipning av hada stodsegment7 kanterna hos lopytan sakerstalla en driftssa, ker igangssattning Oven for backgang. Det uppstar da emellertid avsevart sane frik,- tionsforluster an vid ett vid sidan av mittlin, jen placerat stod. Vidare fordra dessa stOrre friktionsforluster mera omfattande anstalter for bortforande av varmet ur segmentstodlagret. In the case of pump turbine inserts for pumped storage power plants, however, it may happen that at the end of the pump operation, the direction of rotation of the pumping water is reversed in reverse. An equipment of such plants with optimally dimensioned segment support bearings for only one direction of rotation would entail a non-operational start-up in the reverse direction, a. Therefore, standing segments with a stand arranged at the center line have been proposed, which thereby, together with sanding off the standing segments7 the edges of the running surface, ensure an operational, safe start-up above the back passage. However, considerable friction losses then arise on a stand placed next to the center line. Furthermore, these larger friction losses require more extensive institutions for removing heat from the segment bearing.

Uppfinningen har till syfte att a.stadkomma ett segmentstodlager, vid vilket dessa olagenheter undvikas. Enligt uppfinningen ombesoil a stiidlagersegmenten for den normala vridningsriktningen pa kant satt sjalva den erforderliga oljecirkulationen och aro vardera utforda med ett vid sidan av naittlinjen anordnat stod, varjamte en tryckoljetillforselanordning är anordnad mellan varje stodsegments vippunkt och palopningskanten vid backgang. The object of the invention is to provide a segment support bearing in which these imperfections are avoided. According to the invention, the support bearing segments for the normal direction of rotation on the edge set the required oil circulation themselves and are each challenged with a stand arranged next to the seam line, and a pressure oil supply device is arranged between the tilt point of each support segment and the pawl opening edge.

Tryckoljetillforseln forekommer alltsa endast under eller kort fore maskinens back-gang. Darvid bora avstanden mellan tryckoljetillforingarna samt oljetryckets storlek 2203 7 ldmpligen avpassas pa sfidant sdtt, att ett vippande av stodsegmenten till den for backgang optimala lutningen sker. 1 tryckoljetillforselledningarna kunna backventiler inbyggas for att hindra en rubbning av smorjskiktets jamnhet i stodlagret genom tryckoljan vid drift med normal vridningsriktning. Mangden tillford tryckolj a 8kas vid stigande varvtal, om den for backgang optimala lutningen has stodsegmenten skall bibehallas. Det är &TfOr lampligt att styrningen av tryckoljemangden sker i beroende av varytalet. The pressure oil supply therefore only occurs during or shortly before the machine's reverse gear. In this case, the distance between the pressure oil supply lines and the size of the oil pressure 2203 7 must be suitably adjusted in such a way that a tilting of the support segments to the slope which is optimal for reversal takes place. In the pressure oil supply lines, non-return valves can be built in to prevent a disturbance of the uniformity of the lubricating layer in the base bearing through the pressure oil during operation with a normal direction of rotation. The amount of pressure oil supplied increases with increasing speed, if the optimal slope for the reverse gear has the support segments is to be maintained. It is & tfOr appropriate that the control of the pressure oil quantity takes place depending on the product number.

Uppfinningen medlar den fordelen, att stodlager astadkommas, vilka medgiva kortvarig backgAng, utan att ddrvid de gynnsamma egenskaper g. forlorade, som utmarka stOdsegmentlager, vilka dro konstruerade endast for drift i en riktning. The invention provides the advantage that thrust bearings are provided which allow short-term regression, without thereby losing the favorable properties and demarcating thrust bearing segments which are designed only for operation in one direction.

Uppfinningen kan ti1.15.mpas vid hydrodynamiskt smorda stOdlager oberoende av om det ror sig om stodsegment med en vippunkt eller med en vipplinje. Utan betydelse är det vidare, om lagrets underlag utgores av en fjdderbadd eller av elastiskt plastiskt material eller om en halsformad fast forbindning med stodlagerbottnen ãr anordnad. Eftersom nu for stodlagret en tryckoljeanordning är forhanden, kan denna med obetydliga extra atgarder Oven komma till anvandning som starttryckoljeavlastningsanordning Had& ervarje stodsegment en andra tryckoljeanslutning, vilken leder till sinorjspalten mellan stodpunkten och palopningskanten for den normala vridningsriktningen. Vid 15mpligt val av avstand fran stodpunkten kan vid samtitryckoljetillforsel genom de bada tryckoljeanslutningarna hos ett stOdsegment ett lattande av stodringen frau stodsegmenten ske vid stillestand. Dessa andra tryckoljeanslutningar aro vanligen icke forbundna med den. fOrsta utan vane grupp är kopplad for sig saint med tryckoljematningsanlaggning- en. Denna kan emellertid goras omkopplingsbar till badadera. The invention can be applied to 15.15 in the case of hydrodynamically lubricated support bearings, regardless of whether they are support segments with a tilt point or with a tilt line. It is also irrelevant whether the base of the bearing consists of a spring bath or of elastic plastic material or whether a neck-shaped fixed connection with the base bearing base is provided. Since a pressure oil device is now available for the support bearing, this can be used as an initial pressure oil relief device with insignificant additional measures. When selecting the distance from the stand point, in the case of simultaneous pressure oil supply through the two pressure oil connections of a support segment, the support ring from the support segments can be released at standstill. These other pressure oil connections are usually not connected to it. The first unaccustomed group is connected separately with the pressure oil supply system. However, this can be made switchable to badadera.

Claims

Patent claim:

1. SegmentstOdlager, kannetecknat ddray, att stodlagersegmenten for den. the normal direction of rotation on the edge set itself to ensure the required oil circulation and each Oro performed with a stand arranged next to the center line, and that a pressure oil supply device is arranged between the pivot point of each stand segment and the pawl opening edge at reverse.

Segment support bearing according to claim 1, characterized in that in the pressure oil supply lines there are built-in non-return valves, which prevent a disturbance of the uniformity of the lubricating layer in the support bearing by the pressure oil during operation with normal direction of rotation.

Segment support bearing according to patent claim 1, characterized in that the control of the pressure oil supply takes place in dependence on the number of parts.

Segment support bearing according to one or more of the preceding patent claims, characterized by a second pressure oil supply, which lies between the pivot point and the pawl opening edge in the normal direction of rotation and in the case of simultaneous pressure oil supply through the ordinary pressure oil supply segments serve as starting pressure relief device. Request publications: Patent papers forward Sweden 89546; Norway 37050; Great Britain 263 378, 320 989; Germany 436 504; USA 1 196 573, 2 348 928.