SLIDING PAIRING FOR MACHINE PARTS THAT ARE SUBJECTED TO THE ACTION OF HIGHLY PRESSURIZED AND HIGH-TEMPERATURE STEAM, PREFERABLY FOR PISTON-CYLINDER ASSEMBLIES OF STEAM ENGINES

Title:

SLIDING PAIRING FOR MACHINE PARTS THAT ARE SUBJECTED TO THE ACTION OF HIGHLY PRESSURIZED AND HIGH-TEMPERATURE STEAM, PREFERABLY FOR PISTON-CYLINDER ASSEMBLIES OF STEAM ENGINES

Document Type and Number:

WIPO Patent Application WO2002099319

Kind Code:

A3

Abstract:

The invention relates to sliding pairings for machine parts that are subjected to the action of highly pressurized and high-temperature steam, preferably for piston-cylinder assemblies of steam engines. The sliding pairings consist of a first sliding element that was made from a synthetic, fired, but not graphitized, carbon material containing, as an essential filler, graphitized soot coke and/or natural graphite, and whose pores are filled with metal, a metal alloy, a ceramic material, a synthetic resin and/or pitch that was carbonated, preferably in the form of a piston and/or piston ring. The sliding pairings also consist of a second sliding element, preferably provided in the form of a cylinder bush or guide bush made of an iron-containing high-temperature material, which is preferably alloyed with chrome and/or nickel and which, at least on the sliding surface, is provided with a nitrating layer, of a light metal alloy, a material, which is produced using powder metallurgy and which contains iron or steel and titanium carbides, of a ceramic composite, a carbon material, which at least contains graphites, or of a sintered hard metal or with a sliding layer made of hard metal. The inventive sliding pairings function with a low level of wear, in particular, also when subjected to the action of supercritical steam and, preferably, even when subjected to the action of water.

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Inventors:

HOETGER MICHAEL (DE)
KLEEMANN JENS (DE)
RIEPE AXEL (DE)
THIELE WALTER (DE)

Application Number:

PCT/DE2002/001968

Publication Date:

February 20, 2003

Filing Date:

May 29, 2002

Export Citation:

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Assignee:

SGL CARBON AG (DE)
TEA GMBH (DE)
HOETGER MICHAEL (DE)
KLEEMANN JENS (DE)
RIEPE AXEL (DE)
THIELE WALTER (DE)

International Classes:

F01B17/04; F16J1/02; F16J10/04; (IPC1-7): F01B17/04; F16J1/02; F16J10/04

Foreign References:

DE19815989A1	1999-10-21
DE3406479A1	1985-08-29
US5332422A	1994-07-26

Other References: