Abstract:
A direct suction hermetic compressor assembly is disclosed including a hermetically sealed housing (14) having enclosed therein a compressor mechanism discharging compressed gas refrigerant into the interior of the housing, thereby creating a high pressure housing. The compressor mechanism includes a crankcase (46) defining a suction cavity (62) into which low pressure suction gas is directly introduced. Bearings (80,84) in the crankcase communicate between the housing interior and the suction cavity, and rotatably support a crankshaft. Annular seals (182,184) received within grooves in the crankshaft bear against the bearings and are actuated and lubricated by oil fed from within the grooves to prevent high to low pressure gas leakage and to facilitate bearing lubrication. A scotch yoke mechanism operably couples a plurality of radially disposed pistons (96,98) to a crankshaft eccentric portion within the suction cavity. Oil ducts (186) open onto the loaded surface of the eccentric to limit oil leakage into the suction cavity.
Abstract:
(1) de la machine est réalisé en un métal choisi parmi le titane et le nickel ou les alliages de ces métaux et les surfaces de contact (13, 14) des pièces (8, 10) de chaque couple de pièces en mouvement relatif sont recouvertes d'un revêtement (15,16) à faible coefficient de frottement ne formant avec ledit métal ou alliage aucun couplage galvanique en présence de l'eau de mer.
Abstract:
A porous bronze 1b and a resin 1c impregnated in pores of the porous bronze 1b formed on a backing metal 1a constitute a bearing 1. At a surface to be brought into contact with a crank shaft 5, porous bronze 1b and resin 1c are sparsely exposed: Ratio of area of exposure of porous bronze 1b at the contact surface 1d is at least 5% and at most 60%. Thus a bearing for a refrigerating compressor having high seizure resistance at the time of boundary lubrication and having small amount of wear caused by sliding as well as a refrigerating compressor employing the same can be obtained.
Abstract:
A pump (10) comprising a casing (20) to which at least an alternating piston (30) is slidably associated, which piston (30) is destined to delimit, internally of the casing (20), an operating chamber (21) communicating with an inlet (22) and with an outlet (23) for a fluid to be pumped, two annular seals (60, 61) being fixed to the casing (20) and inserted coaxially on the piston (30), and a guide ring (70) inserted coaxially on the piston (30) and fixed to the casing (20) between the annular seals (60, 61), the guide ring (70) comprising a layer (73) containing teflon, which layer (73) defines a cylindrical surface (74) of the guide ring (70) destined to be in contact with a cylindrical surface (36) of the piston (30), the teflon being inserted between the pores of a porous metal material.
Abstract:
A porous bronze 1b and a resin 1c impregnated in pores of the porous bronze 1b formed on a backing metal 1a constitute a bearing 1. At a surface to be brought into contact with a crank shaft 5, porous bronze 1b and resin 1c are sparsely exposed. Ratio of area of exposure of porous bronze 1b at the contact surface 1d is at least 5% and at most 60%. Thus a bearing for a refrigerating compressor having high seizure resistance at the time of boundary lubrication and having small amount of wear caused by sliding as well as a refrigerating compressor employing the same can be obtained.
Abstract:
A porous bronze 1b and a resin 1c impregnated in pores of the porous bronze 1b formed on a backing metal 1a constitute a bearing 1. At a surface to be brought into contact with a crank shaft 5, porous bronze 1b and resin 1c are sparsely exposed: Ratio of area of exposure of porous bronze 1b at the contact surface 1d is at least 5% and at most 60%. Thus a bearing for a refrigerating compressor having high seizure resistance at the time of boundary lubrication and having small amount of wear caused by sliding as well as a refrigerating compressor employing the same can be obtained.
Abstract:
Die Erfindung betrifft eine Vakuumpumpe mit einem Flügel, einem Pumpengehäuse und einem darin drehbar gelagerten Rotor, wobei der Flügel eine konstante Länge aufweist und verschieblich im Rotor gelagert ist und die Flügelspitzen beidseitig aus dem Rotor radial herausragen und an der Innenumfangsfläche des Pumpengehäuses anliegen, wodurch der Flügel einen Saugraum und einen Druckraum definiert, wobei der Flügel einteilig ausgebildet ist und aus Metall besteht.
Abstract:
A piston (10) for use in an engine. The piston (10) includes a piston head (14) having at least one ring groove (26). The piston (10) also includes a piston skirt (18) coated with a first thickness (38) of a bronze coating material, and a side panel (22) adjacent the piston skirt (18) that is coated with a second thickness (42) of the bronze coating material. The first (38) and second (42) thicknesses of the bronze coating material are different. In some embodiments, the bronze coating material also includes aluminum.
Abstract:
The invention relates to a guide block and a method for embodying divisions on a slide plane (22) of a guide block blank (47). The divisions (25) are applied to the guide block blank (47), then a base surface (26) for the slide plane (22) on the guide block blank (47) is pre-prepared. After introduction of a material (41) for application to the base surface (26), a local fusion of the introduced material (41) is carried out, by means of a non-contact heat input (35). Particular forms for the divisions (25) are generated by means of moving the guide block blank (47) and/or a beam (35) of the heat input (34) relative to each other. Finally the support surfaces of the molten material (41) are levelled to generate a planar support surface for the slide plane (22).