DE1888842U - SEAL RING. - Google Patents

Description

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Sealing ring

Selenst & n & the iirfiaclaiäs is ice cream! Dle & taagsriag ans Et? ®! üciiiöüenoa Metalloa for the Afediohtuag by srslativ bevvsgtaa; /, asö * iineateil © ri _t iasbeaoadöre by IColben in Bronalsraf taaschi-

"DiQ Abdiolitung raa BreankraftEasciiiaea, which is operated by y ^ i * wei? Äea, is weighed © a dor 3taateöra © 2 * ₉ di © 6ie l'riebteilö geratea lcöaen, besoades · © schwisrig · So aaü bärsita versueät» the KoIboaring © füi 'soldi © machines to nitrierea bsw. sa öärt @ a, in order to si © special © v © r®ohlQißf @ st sax LLiXQhQn, HoQh SXiBtQ trotscloa w © rd @ a, that the very liar tea ßchlac & enkiJracsr from front wear Xa the & it is in contact with the Breaapulver "dwi.1 i'öile aicht allsasehr ß © sohsi © rt vierdea may, because the Csjführer insists that you should use the Breaapulvcr. 3chai @ raii «tei veriaisöht ua? I thereby disrupts the koatiauiörlichsa process? is aacli hereby ksiae special Yersehleißmisderu & g su. © r rc'iciicii. Ea was fersaer aoah suggestedea, the Dichtri & ge aaa liaciilegierton ötalalaortea hersaetelleas Such © hard © Metals siad geabsr that formed during the participation a uüii Säckstäadoa resistive, jeäooli relatively expensive @ r

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is ea already started, coatings of Ghrots on an au.® S-nut * - iron ο »the like * to apply existing round bodies. Also, has one is already aur improvement of the liaufeigenachaften on the running surface bronze or bronze alloys lsi plaiMiaprltzvorf & href & h upset *

Geisäß the invention it is now proposed that known in at si on way & uoe cast iron, steel or alloy beatehendan Sriiiadkörper © ines sealing ring to the verseJaleißbeanapruahten points rn.lt a molybdenum "or starlc aolybdänkal'tigea layer to coat. This layer is preferably applied to the surface of the ring. Tests have shown that such sealing rings show significant wear even when running dry, with the contact surface being a material that is as hard as possible. An essential advantage of the sealing rings coated with molybdenum according to the invention is that the coating layer can be made very thin without losing any of its resistance. The good bond between the coating and the basic material ¹ is guaranteed. It is also advantageous to apply the molybdenum layer using the flaia spray method, since the molybdenum diffuses into the basic material. The fortified ropes melt together rait dea base material in such a way that they are not detached by subsequent processing nooh in practical operation *

The adhesion of the "molybdenum" to the surface being sprayed in this way thereby improved «ierdea, that this © se completely from

Fat or the like is freed »Preferably is. man Treat the surfaces by sandblasting »grinding, or chemical JUssu & g, which even reduces the risk of oxidation of the surface. It has also proven advantageous to ssusätalieli the base body before the fuel process one or more flames

Am particularly economical process for spraying according to the invention is da§ equilateral from £ wei guns is geapritat "This Verfahren- allows processing yon awei Yerschiedeaen! © metals or -legieraageu, and it is conceivable n ^ h ^ n the very Resistant to Soljbdän, eiii metal jait good oil geaschaf tea zu vöre ^ ritsssn. The jets of the two guns are preferably directed at one point on the workpiece to be treated.

According to the invention, to reduce the oxyageaaltea the fuel pump is also provided, using Asuaoniakgas as the compressed gas, since this splits hydrogen and nitrogen in the flaaaae. At the same time it was found that the formation of a government was caused by the molybdenum sprayed on. of the orunametall ^ which is improved.

For Man ^ ohe Swecke, especially for large piston rings, it is from Advantage, the contact surface of the violet ring in front of the cover with molybdenum in a known manner au, the Iut @ n, if necessary, formed in a spiral shape? could be. ■ This has the advantage that in addition to that in the outer 2Tut

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Molybdenum is the essential part of the body with ear attachments can - if this appears desirable.

In particular, the sealing of the pistons of internal combustion engines is powdery! .Fuel are used, decisive for the efficiency of the same A sharp-edged training was recognized as advantageous, which is why it is further proposed according to the invention that the one with MolyMän. finished oversprayed © piston ring should have a rough running surface edge »This is» as already described above, easily possible by applying the molybdenum iaa 'Flaiasispri ta advance, if at the beginning a relatively equal layer is continuously applied. The continuous operation also results in one ■ good6 adhesion of the liberaug. The sharp-edged formation of the running surface edges can be achieved economically by the fact that several piston rings are attached to a single axis and then molybdenum is overmolded over the entire circumferential surface. In the event that the edges should have a particularly large amount of molybdenum, it is possible to round off this before pulling it off,.

DiQ sprayed-on molybdenum layer is * especially if The body was roughened »not always smooth. Sometimes the single metal droplets protrude as tiny spits. Depending on your needs, the. Surface © can be left as it is., But

it is also possible to grind them by »lapping them. or honing too. smooth. It is also possible and u * u. It is advantageous that the extremely cold deformation is done, a..B * by rolling, pressing etc. Machining usually only needs to be carried out until a closed running surface network has resulted, whereby it is conceivable to move into the remaining island areas To store depressions © in the lubricant »<which may contain sulfur. Since sprayed-on molybdenum tends to be porous, it was found that good results were obtained when at least 40% of the surface was coated with molybdenum. Whether grease, graphite or siolybeta disulphide is used for this is not decisive for the invention. It is, however, essential that there are sufficient running properties after running down. If sulfur favors the formation of molybdenum disulphide, it is often sufficient to catch the? Ertie * or fill pores with sulfur .. When using. According to the invention "Coated piston ring in an internal combustion engine operated with old liquid fuel, it is already sufficient if the liquid contains sulfur. It is just as advantageous to apply a further, but softer, shrinkage-promoting layer to the Holjbdänschioht, aB old sense, lupfer or the like The softer metal acetate is removed from the counter surface, so that ultimately only the remaining pores or depressions in the molybdenum surface are filled with it.

Molybdenum is suitable as a wear-resistant lethal surface

marriage-to. serve is known »So mn already has to. The worn parts of pistons, skins or spindles are reused after a molybdenum layer has been sprayed on. the hydrolysis layer on average has a radial thickness. of jaindeatens 0.1 ms to spend. This does not mean that this layer must be applied in one operation. It is also conceivable that first a layer of thin film, only a few hundredths of a millimeter thick, is brewed in order to produce good adhesion between the molybdenum metal and then the desired thicker layer -aafstispritaiea. In places where the molybdenum layer is particularly susceptible to wear and tear, it can be applied less thickly than on the rest of the filing. This different thickness of the molybdenum layer can also be desired for reasons of different tension. if the 'Ub.er' ag has a minimum adhesive strength of '.0.4 kg / am, .... ■ -

According to the invention, it is of advantage to form the main body of the Hinges- from a waraiest steel 2U, but the Vickery hardness of the length of the round body should be at least 200 kg / mm and the Mo. «Have a Vickers hardness of 350 kg / eua. As it has been inclined, molybdenum-alienö sealing rings © tend to break if improperly processed. However, this 'defect' can largely be remedied if the axial height

of the Biohttmgaringes 1/5 and in any case not much than 3/5 its radial width is. '-.

Finally, it is also conceivable that the MölybdSnaöhiöht aafaubringea in other ways. 3o a molybdenum & additional thermal decomposition of flxlohtigea molybdenum compounds can be obtained, such as molybdenum hexacarbonyl. Self
A molybdenum coating can be produced in the cathode artery or also in alvaniachöa ways. which already meets most requirements

In the drawing, the Urfindong is on one
apiel shown.

The piston ring 1 is on its Laoffläohe with a 'Molyb danish 2 covered ».

Claims (1)

Expectations 1 Sealing ring made of two different metals for sealing iron relatively moving machine parts, characterized in that the base body, which is made of black iron, steel or light metal in a manner known per se, with a pure or almost pure molybdenum applied in the flame spraying process, preferably attaches to the areas of the surface subject to wear the running surface is covered 2. Piston ring according to claim 1, characterized in that its surface is roughened in a known manner before coating, e.g. sandblasted, ground or etched 3 · Piston ring according to claims 1 and 2, characterized in that » ne- Laui ^ area iln an ~ s ± ch befcaimter ^ - if it has spiral grooves that are wholly or partially covered with molyb- " are filled in in Danish. - * f. Piston ring according to claims 1 to 3 »characterized in that the molybdenum-coated running surface ground in a known manner, lapped or honed 5 · Piston ring according to claims 1 to 4, characterized in that in the pores of the coating contain sulfur, possibly a lubricant containing sulfur. 6. Piston ring according to claims 1 to 5 »characterized in that the Molybdenum coating with another, but softer, shrinkage favorable layer, e.g. tin, copper or the like, is coated » 7 · Piston ring according to claims 1 to 6, characterized in that the SrundkSrper "is made of a heat-resistant steel Γ" SchuUonsp ,.) is - she zultfd ^ qereichm, she deviates from ά « *" -