Abstract:
PROBLEM TO BE SOLVED: To provide a control valve for a variable displacement compressor in which leakage of refrigerant gas in a completely closed state is reduced. SOLUTION: The variable displacement type swash plate compressor 1 can change a delivery capacity thereof by changing pressure of a crank chamber 5. The control valve CV controls pressure of the crank chamber 5 by changing opening of an air supply passage 7 connecting an oil separator 4 as a high pressure area with the crank chamber 5. In the control valve CV, a bearing surface 32a of a valve seat 32 and an open/close face 31a of a valve element part 31 for adjusting the opening of the air supply passage 7 are made of high-hardness materials. Case hardening by nickel phosphorus plating of material of the valve seat 32 is performed to form the bearing surface 32a of the valve seat 32 made of high-hardness material. Further, case hardening by salt bath nitriding of material of the valve element part 31 is performed to form the open/close face 31a of the valve element part 31 made of high-hardness material. COPYRIGHT: (C)2004,JPO
Abstract:
PURPOSE: A sliding member in a compressor is provided to improve the adhesion of a nickel base plating layer and a diamond like carbon layer. CONSTITUTION: A sliding member in a compressor comprises: a nickel base plating layer(35) which is formed on aluminum base material(27) and contains at least one additive among nitrogen, silicon, titanium, chrome and aluminum; and a diamond-like carbon layer(36) which is formed on the surface of the nickel base plating layer and contains the same additive which the nickel base plating layer contains. A nickel base plating layer which does not contain the additive is formed between the base material and the nickel base plating layer containing the additive. A diamond-like carbon layer which does not contain the additive is formed on the surface of the diamond-like carbon layer containing the additive. The nickel base plating layer is a nickel-phosphor plating layer.
Abstract:
The invention relates to a two-part piston (1) for an internal combustion engine, consisting of an upper part (2) and a lower part (3) which is screwed to the upper part. The upper part (2) and the lower part (3) are in contact with each other, partially by means of inner bearing surfaces (25, 26) defining the lower side of an upper ring rib (10) and the upper side of a lower ring rib (11), and partially by means of outer bearing surfaces (28, 29) defining the lower side of the ring wall (9) and the upper side of a collar (27) applied to the lower part (29). In order to avoid frictional rubbing, frictional heat sealing and pressure-related material heat sealing, at least one of the bearing surfaces (25, 26, 28, 29) is easily and economically provided with a chrome layer (30) which has a structured surface comprising a plurality of raised parts and recesses. ® KIPO & WIPO 2009
Abstract:
Hardening wrought nickel-chromium-iron-titanium-aluminium alloy with very good wear resistance combined with good creep strength, good high-temperature corrosion resistance and good processability, said alloy comprising (in % by mass) > 18 to 31% chromium, 1.0 to 3.0% titanium, 0.6 to 2.0% aluminium, > 3.0 to 40% iron, 0.005 to 0.10% carbon, 0.0005 to 0.050% nitrogen, 0.0005 to 0.030% phosphorus, max. 0.010% sulphur, max. 0.020% oxygen, max. 0.70% silicon, max. 2.0% manganese, max. 0.05% magnesium, max. 0.05% calcium, max. 2.0% molybdenum, max. 2.0% tungsten, max. 0.5% niobium, max. 0.5% copper, max. 0.5% vanadium, optionally 0 to 15% Co, optionally 0 to 0.20% Zr, optionally 0.0001 to 0.008% boron, remainder nickel and the conventional process-related impurities, wherein the nickel content is greater than 35%, wherein the relationship Cr + Fe + Co > 25% (1) has to be satisfied in order to achieve good wear resistance, and the relationship fh > 0 (2a), where fh = 6.49 + 3.88 Ti + 1.36 Al - 0.301 Fe + (0.759 - 0.0209 Co) Co - 0.428 Cr - 28.2 C, (2) has to be satisfied in order that an adequate strength at higher temperatures is provided, wherein Ti, Al, Fe, Co, Cr and C are the concentration of the elements in question in % by mass and fh is given in %.
Abstract:
Eine Hubkolbenpumpe für kryogene Flüssigkeiten hat einen Pumpenzylinder (1) mit einer Laufbüchse (2) und einer Zylinderkopfkammer (3). Ein Pumpenkolben (4) ist in der Laufbüchse (2) linear beweglich geführt und vergrössert / verkleinert dadurch die besagte Zylinderkopfkammer (3). Ein Einlassventil (5) ist in einem Einlassbereich und ein Auslassventil (6) ist in einem Auslassbereich der Zylinderkopfkammer (3) angeordnet. Der Pumpenkolben (4) ist dazu ausgebildet, sich in der Laufbüchse (2) zwecks Bewirkung des Pumpvorganges hin- und herzubewegen. Die Laufbüchse (2) weist zumindest in einem zylinderkopfnahen Bereich eine chrom-basierte reibungsarme Innenbeschichtung auf, der Pumpenkolben (4) ist kolbenringlos ist und weist zumindest im Laufbüchsenbereich eine chrom-basierte reibungsarme Aussenbeschichtung auf.
Abstract:
Die Erfindung betrifft eine Lotlegierung gemäß Anspruch 1 und ein Verfahren zur Reparatur eines Bauteils gemäß Anspruch 43. Lotverfahren mit den verwendeten Loten haben oft den Nachteil, dass das Lot schlechte Hochtemperatureigenschaften aufweist. Die erfindungsgemäße Lotlegierung ist nickelbasiert und weist die Bestandteile Chrom, Kobalt, Wolfram auf sowie 0,5% bis 22,4wt% eines der Elemente aus der Gruppe Scandium, Aluminium, Titan, Zirkon oder Tantal und wird bei dem erfindungsgemäßen Verfahren zur Reparatur eines Bauteils verwendet.