DK155342B

DK155342B - Thrust bearing with slide face of glass

Info

Publication number: DK155342B
Application number: DK280185A
Authority: DK
Inventors: Niels Due Jensen; Niel Horn Nielsen
Original assignee: Grundfos Int
Priority date: 1985-06-20
Filing date: 1985-06-20
Publication date: 1989-03-28
Also published as: DK280185A; DK155342C; DK280185D0

Description

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DK 155342 BDK 155342 B

Opfindelsen angår et trykleje af den art, som omfatter en på en aksel fast anbragt og sammen med denne roterbar lejesektion samt en i en understøtning anbragt ikke-roterbar lejesektion, hvor kraftoverføringen fra den roterbare lejesektion til den 5 ikke-roterbare lejesektion sker ved glidning af lejesektioner-ne mod hinanden, idet der mellem disse er en smørefilm.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a thrust bearing of the type comprising a shaft fixedly mounted and together with this rotatable bearing section as well as a non-rotatable bearing section, in which the force transfer from the rotatable bearing section to the non-rotatable bearing section takes place by sliding the the bearing sections towards each other, there being a lubricating film between them.

Fra artiklen:"The push-pull spiral-grove bearing - a thrust bearing with self-adjusting internal preloading", Philips 10 Tech. Rev. 35, 1975, nr. 1, side 11-14, kendes et selvindstillende luftbåret trykleje, hvor de to lejesektioners lejeflader er dannet af hver sin glasskive. I den ene glasskives lejeflade er der indrettet et ringformet bånd med spiralformede spor, som danner et overtryk mellem skiverne, og i den anden 15 glasskive er der på en mindre diameter indrettet et tilsvarende bånd med spiralformede spor, som danner et undertryk mellem skiverne. Herved tilvejebringes ved rotation af den ene skive en konstant afstand mellem lejefladerne, idet kræfterne fra de to tryk udbalancerer hinanden. Denne type leje er imidlertid 20 meget dyr at fremstille og uegnet til overførsel af større belastninger.From the article: "The push-pull spiral coarse bearing - a thrust bearing with self-adjusting internal preloading", Philips 10 Tech. Rev. 35, 1975, No. 1, pages 11-14, a self-adjusting air-borne pressure bearing is known, in which the bearing surfaces of the two bearing sections are formed by their own glass disc. In the bearing surface of one glass disc there is arranged an annular band with helical grooves forming an overpressure between the discs, and in the other 15 glass disc a corresponding band with helical grooves is provided which forms a negative pressure between the discs. Hereby, by rotating one disc, a constant distance between the bearing surfaces is provided, the forces of the two pressures balancing each other. However, this type of bearing is very expensive to manufacture and unsuitable for transferring larger loads.

Endvidere er det i forbindelse med tryklejer af Michell-typen kendt, åt forsyne en på akselen fast anbragt lejedel med en 25 glideflade af keramik og lade denne glide på en eller flere i en understøtning anbragte ikke-roterbare klodser af grafit (Michel1-klodser). Anvendelsen af kombinationen keramik/grafik er imidlertid ikke helt tilfredsstillende, især er fremstillingsomkostningerne forholdvis høje, idet det bl.a. er meget 30 tidskrævende at fremstille en i smøreteknisk henseende optimal overflade på keramik.Furthermore, it is known in connection with the Michell-type pressure bearings to provide a bearing part fixed to the shaft with a ceramic sliding surface and to slide it on one or more non-rotatable graphite bricks (Michel1 bricks). . However, the use of the ceramic / graphic combination is not entirely satisfactory, especially the manufacturing costs are relatively high. is very time-consuming to produce an optimum surface for ceramics in the field of lubrication.

Det er formålet med opfindelsen at anvise et trykleje af den indledningsvis nævnte art, som er billigere at fremstille end 35 de hidtil kendte lejer, og som har gode smøretekniske egenskaber .SUMMARY OF THE INVENTION It is an object of the invention to provide a pressure bearing of the type mentioned above which is cheaper to manufacture than the previously known bearings and which has good lubricating properties.

Tryklejet ifølge opfindelsen er ejendommelig ved, at den ene af leiesektionerne (2. 41 fortrinsvis den roterbare leiesek- 2The pressure bed according to the invention is characterized in that one of the bearing sections (2. 41 is preferably the rotatable bed section).

DK 155342 BDK 155342 B

j ] tion (2), på i og for sig kendt måde består af eller indeholder en homogent størknet amorf glasplade (5) med i hovedsagen plan glideflade (6), og at den anden lejesektion (4, 2) består af eller indeholder et antal gi ideklodser, fortrinsvis af 5 Michel!-typen. Herved opnås det at lejet kan fremstilles meget billigt, idet f.eks. den ene lejesektions glideflade kan forefindes på en glasplade, som er udskåret af en glastavle, eller som er direkte udstøbt med den ønskede geometri. Samtidigt har glaspladen på grund af sin "medfødte" homogene overflade og 10 gas tætte struktur- en overflade, der er ideel til at bære en smørefilm. Dette sammenholdt med, at den anden lejesektion omfatter gi i deklodser af Michell-typen, bevirker, at glidefla-derne holdes godt smurte selv ved betydelige fladetryk.jation (2), known per se, consists of or contains a homogeneously solidified amorphous glass plate (5) having a substantially flat sliding surface (6) and the second bearing section (4, 2) consists of or contains a number of g id blocks, preferably of the 5 Michel! type. Hereby it is obtained that the bed can be made very cheaply, for example. the sliding surface of one bearing section may be provided on a glass plate which is cut out of a glass plate or which is directly molded with the desired geometry. At the same time, due to its "innate" homogeneous surface and 10 gas, the glass plate has a dense structure ideal for carrying a lubricating film. This, in conjunction with the second bearing section comprising gi in Michell-type decals, causes the sliding surfaces to be well lubricated even at considerable surface pressure.

15 Ifølge opfindelsen kan glaspladen være limet til den roterbare lejesektion fortrinsvis ved hjælp af limfolie. Dette medfører @n særlig simpel og billig fastgørelse af glaspladen.According to the invention, the glass plate can be glued to the rotatable bed section preferably by means of adhesive foil. This results in a very simple and inexpensive attachment of the glass plate.

Endelig kan ifølge opfindelsen gi ideklodserne bestå af eller 20 indeholde et blødere lejemateriale end glas, fortrinsvis gra fit eller et graf itholdigt materiale. Denne udførelsesform har i praksis vist sig meget hensigtsmæssig.Finally, according to the invention, the glue blocks may consist of or contain a softer bed material than glass, preferably graphite or a graphite-containing material. In practice, this embodiment has proved to be very convenient.

Opfindelsen forklares nedenfor under henvisning til tegningen, 25 hvor fig. 1 viser et lodret snit gennem en foretrukken udførelsesform for tryklejet ifølge opfindelsen med en roterbar lejesek-_ ti on omfattende en homogent størknet glasplade og en ikke-30 roterbar lejesektion omfattende et antal g 1 ideklodser, og f i g. 2 et lodret snit gennem en anden udførelsesform for opfindelsen, hvor den ikke-roterbare lejesektion omfatter en homogent størknet glasplade.The invention is explained below with reference to the drawing, in which FIG. 1 shows a vertical section through a preferred embodiment of the printing bed according to the invention with a rotatable bed section comprising a homogeneously solidified glass plate and a non-rotatable bed section comprising a plurality of g 1 id blocks, and fig 2 a vertical section through a another embodiment of the invention wherein the non-rotatable bed section comprises a homogeneously solidified glass plate.

En foretrukken udførelsesform for tryklejet ifølge opfindelsen - se.fig. 1- omfatter en på en aksel 1 fast anbragt og sammen med denne roterbar lejesektion 2, samt en i en understøtning 3 35A preferred embodiment of the pressure bed according to the invention - see fig. 1- comprises one fixedly mounted on a shaft 1 and together with this rotatable bearing section 2, as well as one in a support 3

Claims

A thrust bearing of the type comprising a shaft fixedly mounted on and along with this rotatable bearing section (2) and a non-rotatable bearing section (4) arranged in a support (3), the power transfer from the rotatable bearing section to the non-rotatable bearing section is effected by sliding the bearing sections towards each other, a lubricating film between them, characterized in that one of the bearing sections (2, 4) is preferably the rotatable bearing section (2). , known per se, consists of or contains a homogeneously solidified amorphous glass plate (5) having a substantially planar sliding surface (6) and the second bearing section (4, 2) consists of or contains a plurality of g , preferably of the Michell type.

Pressure bed according to Claim 1, characterized in that the glass plate (5) is glued to the rotatable bearing section (2) for use.

Pressure according to claim 1 or 1, characterized in that the glue blocks consist of or contain a softer bed material than glass, preferably graphite or a graphite-containing material. 5 10 15 20 25 30 35