FEDERAL MOGUL FRIEDBERG GMBH, A TENNECO GROUP COMPANY (Germany)
TREFFLER MASCHINENBAU GMBH & CO. KG (Germany)
Inventor
Arenz, Daniel
Treffler, Dominikus
Abstract
The present invention relates to a wearing element (2) for a soil-working tool (40), in particular an agricultural soil-working tool (40), and also to the associated soil-working tool (40), wherein the wearing element (2) has at least one cutting edge (4) and/or tip (6) and/or a directing element (26), and also has at least one fastening portion (18) and in particular a mechanical interface, designed for detachably fastening the wearing element (2) to a main body (20) of an associated soil-working tool (40), wherein the wearing element (2) is produced from cast iron, in particular from white-solidified cast iron or comprises white-solidified cast iron.
The invention relates to a sliding ring (44) for a running gear seal (40), comprising a sliding surface (46) and at least one contact surface (54) for an elastomer ring (42). The invention is characterized by at least two locking elements (10) which are arranged in the circumferential direction and which have excellent elastic properties, in particular at least two locking elements (10) with pawls or locking springs, which are designed to engage into at least one corresponding engagement structure (6) that runs in the circumferential direction on the sliding ring (44) or on a housing (60).
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
F16D 41/18 - Freewheels or freewheel clutches with non-hinged detent
F16D 43/202 - Internally controlled automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type
3.
Piston ring with shot-peened running-in layer and method for the production thereof
A piston ring includes an annular body, a wear-resistant layer that is applied to the annular body by thermal spraying, and a strain-hardened run-in layer, made of an AlCuFe alloy, that is applied to the wear-resistant layer by thermal spraying.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
The present invention relates to a piston ring, having an annular body (2), a wear protection layer (6) applied onto the annular body (2) by thermal spraying; and a cold-solidified running-in layer (8) applied onto the wear protection layer (6) by thermal spraying and made of an AlCuFe alloy.
C23C 4/08 - Metallic material containing only metal elements
C23C 4/10 - Oxides, borides, carbides, nitrides or silicidesMixtures thereof
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
The invention relates to a piston ring for an internal combustion engine or for a compressor, in particular a piston ring comprising an exterior running surface (3), two flanks (5, 6), and an interior circumferential surface (7); the running surface (3) has a profiled section with a groove (2), said groove (2) being located between an upper portion (3') of the running surface and a lower portion (3") of the running surface in relation to the cross-section of the piston ring (1).
The invention relates to a slide ring, comprising a main body composed of gray cast iron (2), wherein at least a partial region (6) of a functional surface (4) has a ledeburitic microstructure at the surface. The invention further relates to a method for producing a slide ring, comprising producing a slide ring composed of gray cast iron (2), heating a functional surface (4) of the slide ring by irradiating the functional surface of the slide ring with high-energy radiation, wherein the irradiation is performed in such a way that at least a partial region of the irradiated surface is remelted, wherein the parameters of the irradiation are selected in such a way that at least a partial region (6) of the functional surface has a ledeburitic microstructure after the functional surface has been cooled.
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
The invention relates to a piston ring (1) having an outer peripheral surface, an inner peripheral surface and two flanks, wherein the peripheral surface has a spherical profiled section, and wherein the axial width of the running surface (2) and/or the angle between the running surface (2) and at least one flank and/or the radius of the profiled section varies periodically over the periphery of said piston ring (1).
The present invention relates to a method for producing a cylinder liner, comprising the provision of a metallic cylinder liner main body (2), formation of at least one groove (4) on the outside of the main body (2), covering the groove (4) with a metal strip (6), and coating the metal strip and at least one adjoining region of the main body with a metallic coating (8), in order to form a form-fitted compound structure including the main body (2), metal strip (6) and coating (8) in such a manner that the covered groove defines a closed channel. The invention further relates to a cylinder liner produced by means of said method.
A cast iron material, particularly a ledeburitic cast iron material with a carbide content of at least 15 wt. % and a characteristic free, evenly distributed graphite formation is disclosed. In this case, the evenly distributed graphite formation may comprise graphite flakes and/or vermicular graphite and/or nodular graphite. Depending on the respective application (diameter (D) of the running gear seal, peripheral speed), the basic matrix may be realized in pearlitic and/or bainitic and/or martensitic form. Due to the high graphite content, the material has a thermal conductivity that is three to four times greater than that of white cast iron materials, wherein this provides the advantage that no scoring of the running gear seals occurs at high peripheral speeds (>5 m/s) and large diametrical dimensions of the seals (D >600 mm). In addition, the high carbide content of at least 15 wt. % provides an adequate wear resistance, and other alloying elements such as chromium, vanadium, molybdenum and nickel provide the material with a corresponding corrosion resistance. The aforementioned ledeburitic cast iron material with evenly distributed graphite formation can be used, for example, for the manufacture of axial face seals and cylinder liners.
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