Abstract:
The present invention is to provide a refrigerant compressor comprising a compressing element driven by a rotary shaft, for compressing and discharging a sucked HFC type refrigerant or refrigerant mainly comprising the HFC type refrigerant by the compressing element, where a rotary shaft applied with the plasma sulphonitriding treatment on the surface is used as the rotary shaft. Or a vane applied with the plasma sulphonitriding treatment on the surface of a vane made of a steel equivalent to a high speed tool steel vane or a steel equivalent to a stainless steel is used. Accordingly, a refrigerant compressor comprising a rotary shaft or a vane having a low friction coefficient in a sliding portion on the surface of the rotary shaft or the vane and a high wear resistance can be provided even in the case an ester type refrigerator oil or an ether type refrigerator oil is used as the refrigerator oil and an HFC type refrigerant is used.
Abstract:
A sealed-type compressor used with HFC refrigerant. The sealed-type compressor houses a motor and compression machinery in a sealed case. The compression machinery includes at least a pair of sliding members wherein one sliding member having aluminum as its main body and having its surface alumite treated and the other sliding member having a metal material. The compressor includes an at least quadrivalent ester oil for the refrigerating machine oil which lubricates the sliding members.
Abstract:
A sealed-type compressor used with HFC refrigerant. The sealed-type compressor houses a motor and compression machinery in a sealed case. The compression machinery includes at least a pair of sliding members wherein one sliding member having aluminum as its main body and having its surface alumite treated and the other sliding member having a metal material. The compressor includes an at least quadrivalent ester oil for the refrigerating machine oil which lubricates the sliding members.
Abstract:
The invention relates to an air compressor (10), e.g. for supplying compressed air to a pneumatic system in a motor vehicle, comprising a crankcase (46), a cylinder housing (14) connected to the crankcase, a cylinder head (20), a crankshaft (40) rotatably mounted in the crankcase, a cylindrical piston (12) that is connected to the crankshaft (40) by a connecting rod (42) and is arranged so as to be axially movable along a cylindrical sliding surface (56) of the cylinder housing (14), at least one piston ring (54) or oil ring in an annular groove (52) on the outer surface of the piston (12), a compression chamber (16) that is formed above the piston (12) and is sealed by the cylinder head (20), further comprising a suction duct (26) and a discharge duct (28) that are formed in a top portion (22) of the cylinder head (20), at least one suction valve (36) associated with the suction duct (26), and at least one pressure valve (38) associated with the discharge duct (28). The crankcase (46) and the cylinder housing (14) are manufactured using aluminum. In order to load the compressed air with as little heat as possible, the crankcase (46), the cylinder housing (14), the cylinder head (20), and the piston (12) are made of aluminum or an aluminum alloy, and the at least one piston ring (54) or the at least one oil ring is made of gray cast iron or polytetrafluoroethylene (PTFE).
Abstract:
A rotary-piston internal combustion engine (E1) has an output shaft (1); a rotor (2); a housing (4); an annular operation chamber (5) that is formed by the rotor and the housing, on at least one side of the rotor in the direction of the axis of the output shaft, the annular operation chamber (5) forming an intake operation chamber, a compression operation chamber, a combustion operation chamber, and an exhaust operation chamber; a single pressure applying/pressure receiving member (6) that is provided on the rotor and partitions the annular operation chamber; two operation-chamber partitioning members (7, 8) provided on the housing and partition the annular operation chamber; urging mechanisms that individually urge the operation-chamber partition members toward their advanced positions; an intake port (11); an exhaust port (12); and a fuel injector (14). The pressure applying/pressure receiving member (6) is constructed from a circular arc-shaped partitioning member having first and second slope surfaces. The operation-chamber partitioning members (7, 8) are each constructed from a reciprocating partitioning member that advances and retreats in the direction in parallel with the axis of the output shaft.
Abstract:
A multi stage vacuum pump for pumping corrosive fluid with a first flow path of less corrosion material than the material of a second flow path downstream of the first flow path.
Abstract:
A liquid ring pump is provided that includes an annular housing having an inner surface forming a housing cavity. The annular housing is filled with an operating fluid during operation of the pump. The operating fluid forms an eccentric liquid ring in the annular housing during operation of the pump. A rotor is disposed in the housing cavity and includes a plurality of rotor blades. A shaft extends into the annular housing into the housing cavity. The plurality of rotor blades extend radially outward from the shaft toward the inner surface of the annular housing. A liner formed from a corrosion resistant material is disposed substantially flush with at least a portion of the annular housing inner surface opposite a plurality of rotor blade ends.
Abstract:
A method of manufacturing a pin (roller) holding ring for a gear mechanism in which external gears (5a, 5b) are meshed internally with an internal gear (20) comprising a pin (roller) holding ring (110) having semi-circular pin (roller) holding holes in the inner peripheral side and pins (rollers) (11) close-fitted rotatably in these pin holding holes, the method comprising the steps of drilling fully circular pin holding holes (113a) in a ring base material before the inner diameter DA of a pin holding ring base material (151) is machined to a finish diameter, and expansion-machining the inner diameter of the pin holding ring up to a finish diameter after the inner surfaces of the pin holding holes have been surface-finished by a roller burnishing machining so as to provide the pin holding ring having semi-circular pin holding holes, whereby the sliding rotation of the pins in the pin holding holes can be improved.
Abstract:
An object of the present invention is to provide a method for manufacturing a compressor slider that can be used to manufacture a compressor slider at lower cost than a method for manufacturing a compressor slider in which "a slider preform for a compressor is manufactured by thixocasting, and the slider preform is machine finished with ultrafine precision to obtain the final slider." The method for manufacturing a compressor slider has a slider preform manufacturing step, a resin coating step, and a machining step. In the slider preform manufacturing step, an iron slider preform (25) in which at least one property selected from the tensile strength and the tensile modulus of elasticity is greater than that of flake graphite cast iron is manufactured using a prescribed mold. In the resin coating step, the slider preform is not machined, but the resin coating layer (25a) is formed on all or a part of the slider preform. In the machining step, only the resin coating layer is machined, and a completed slider (17, 23, 24, 26, 39, 60) is obtained.