Abstract: The properties of lubricating oil are utilized to avoid excessive quality in terms of the circularity of roller members while reducing the noise from a radial roller bearing alone during rotation and thereby reducing the noise from a rotary machine. The radial roller bearing includes an outer ring member (30A), a plurality of roller members (30B), and a retainer, and a lubricating oil (O) is supplied between the outer ring member (30A) or a rotating shaft and the roller members (30B). The circularity (?R) of the roller members (30B) in a cross section perpendicular to a centerline (CL) thereof is set to be lower than or equal to the minimum oil film thickness (hmin) of an oil film formed by the lubricating oil (O).

Abstract: To allow a bush to stably rotate about a bush center, an end of a vane portion that is close to an inner circumferential surface center is always positioned on the inner side with respect to the bush center. Thereby, in a vane compressor a vane is stably supported, wear at a tip of the vane is suppressed, loss due to sliding on bearings is reduced by supporting a rotating shaft portion with a small diameter, and accuracy in outside diameter and center of rotation of a rotor portion is increased.

Abstract: A vane compressor includes a cylinder, a rotor portion, vanes, and a first discharge port allowing a refrigerant in a compression chamber to be discharged therethrough. The vanes are disposed inside the rotor portion and held rotatably about the center of a cylinder inner circumferential surface, partition a space between the cylinder inner circumferential surface and the rotor portion, and form the compression chamber. A second discharge port is disposed at a location having a phase angle smaller than that at the first discharge port, being open to the cylinder inner circumferential surface, and communicating with the compression chamber. The second discharge port includes an opening portion to the compression chamber, the opening portion having a width in the circumferential direction, the width being equal to or smaller than the width of the tip of each of the vanes.

Abstract: A vane-type compressor includes a rotor shaft that includes rotating shaft portions and a rotor portion, which are integrated with one another. A lower end of the rotating shaft is disposed in an oil reservoir. The vane-type compressor also includes vane aligners disposed at both end portions of vanes, and recess portions, which are respectively formed in a frame and a cylinder head so as to be concentric with an inner circumferential surface of a cylinder. Outer circumferential surfaces of the vane aligners are slidably supported by the recess portions. In the rotor shaft, oil supply channels, which allow communication between the oil reservoir and the recess portions of the frame and the cylinder head, and an oil pump, which supplies refrigerating machine oil in the oil reservoir to the oil supply channels, are provided.

Abstract: The present invention is intended to provide an organic resin non-crimped staple fiber that has notably few defects and that uniformly disperses in a dispersion medium, and that is preferred for use in wet-laid nonwoven fabrics or resin reinforcement in applications such as in industrial materials and daily commodities. The organic resin non-crimped staple fiber of the present invention has a fineness of 0.0001 to 0.6 decitex, a fiber length of 0.01 to 5.0 millimeters, a moisture content of 10 to 200 weight %, a cut-end coefficient of 1.00 to 1.40, and a coefficient of variation relative to fiber length (CV %) of 0.0 to 15.

Abstract: In rollers used in a radial needle bearing, the circularity of crowning sections provided at opposite ends of each roller is 0.6 ?m or smaller. This allows for reduction of sound (noise) produced when the radial needle bearing rotates by itself and can also allow for reduction of sound (noise) of a rotational machine when the radial needle bearing is installed and rotates therein.

Abstract: The object of the present invention is to provide a catalyst having an excellent catalyst activity. In the present invention, a catalyst is configured to include a catalyst support and a catalyst metal supported on the catalyst support, wherein a mode radius of pore distribution of pores of the catalyst is 1 nm or more and less than 5 nm, wherein the mode radius is equal to or less than an average particle radius of the catalyst metal, and wherein a pore volume of the pores is 0.4 cc/g support or more.

Abstract: The present invention has an object to provide a catalyst having excellent oxygen reduction reaction activity. The present invention relates to a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein a specific surface area of the catalyst per support weight is 715 m2/g support or more or a covering ratio of the catalyst metal with an electrolyte is less than 0.5, and an amount of an acidic group of the catalyst per support weight is 0.75 mmol/g support or less.

Abstract: A multi-cylinder rotary compressor includes plural compression mechanism parts. A drawing force is applied to a vane of at least one of the compression mechanism parts radially outward with respect to a drive shaft, making a pressing force pressing the vane toward a piston smaller than in other compression mechanism parts. In a normal state, a pressing force due to a gas pressure difference between a suction pressure and a discharge pressure is larger than the drawing force, and a vane front end is pressed against a rotary piston peripheral wall. When the drawing force becomes greater than the pressing force, the vane front end is moved to separate from the rotary piston peripheral wall with a space through which oil is introduced from a sealed container, and a retention mechanism retains the vane separated from the piston, and the compression mechanism part switches to an uncompressed state.

Abstract: A vane compressor including plural vanes that perform a compression operation such that the normal to a circular arc formed by each vane tip portion and the normal to the inner peripheral surface of a cylinder are constantly approximately coincident with each other. Each of the plural vanes is held constantly in the normal direction of the inner peripheral surface of the cylinder or is held constantly along a direction having a fixed inclination with respect to the normal direction of the inner peripheral surface of the cylinder so that the compression operation is performed in the state the normal to the circular arc formed by the tip portion of each of the plural vanes and the normal to the inner peripheral surface of the cylinder are constantly approximately coincident with each other. The plural vanes are rotatably and movably supported with respect to a rotor portion.

Abstract: A scroll compressor in which a paired fixed scroll and rotating scroll each having a spiral wrap provided upright on an end plate are engaged to form a compression chamber and in which a discharge port that discharges fluid compressed in the compression chamber is provided at the central portion of the fixed scroll, wherein the discharge port has a deformed elongated hole shape having circular holes at both ends, and the circular holes at both ends are connected by two surfaces the width between which is smaller than the hole diameters of the circular holes.

Abstract: There is provided a vane compressor with a plurality of vanes having a structure in which a rotor portion and a rotary shaft are unitarily formed so as to reduce bearing sliding loss of the rotary shaft and reduce gas leakage loss by narrowing a space formed between the rotor portion and the inner peripheral surface of a cylinder.

Abstract: There is provided a method for heat treatment, a heat treatment apparatus, and a heat treatment system capable of performing highly precise and efficient control of heat treatment such as a bright treatment of materials to be treated with ease and safety. A heat treatment furnace has in-furnace structures made of graphite and has a heat-treatment chamber in which heat treatment of materials to be treated is performed. A value of ?G0 (standard formation Gibbs energy) is computed with reference to the sensor information from respective sensors, and an Ellingham diagram, a control range, and a status of the heat treatment furnace in operation expressed by ?G0 are displayed on a display device 331. A control unit 334 controls a flow rate of neutral gas or inactive gas as atmosphere gas or a flow velocity of the gas so that ?G0 is within the control range.

Abstract: There are provided a method for heat treatment, a heat treatment apparatus, and a heat treatment system capable of efficiently controlling heat treatment such as a bright treatment with high precision and without causing oxidation and decarbonization. Computation of ?G0 (standard formation Gibbs energy) is performed by referring to sensor information from respective sensors, and an Ellingham diagram, a control range, and a status of the heat treatment furnace in operation expressed with ?G0 are displayed on a display device 531, while a flow rate of hydrocarbon gas is controlled by a control unit 534 so that ?G0 is within the control range.

Abstract: A gap between a vane tip and a cylinder inner circumferential surface is denoted by ?. If rv is set as in an Expression (1), a first vane rotates with the vane tip thereof being out of contact with the cylinder inner circumferential surface. In the vane compressor, wear at the tip of a vane is suppressed, loss due to sliding on bearings is reduced by supporting a rotating shaft portion with a small diameter, and accuracy in an outside diameter and center of rotation of a rotor portion is increased.

Abstract: A vane compressor includes a cylinder, a rotor portion, vanes, and a first discharge port allowing a refrigerant in a compression chamber to be discharged therethrough. The vanes are disposed inside the rotor portion and held rotatably about the center of a cylinder inner circumferential surface, partition a space between the cylinder inner circumferential surface and the rotor portion, and form the compression chamber. A second discharge port is disposed at a location having a phase angle smaller than that at the first discharge port, being open to the cylinder inner circumferential surface, and communicating with the compression chamber. The second discharge port includes an opening portion to the compression chamber, the opening portion having a width in the circumferential direction, the width being equal to or smaller than the width of the tip of each of the vanes.

Abstract: To allow a bush to stably rotate about a bush center, an end of a vane portion that is close to an inner circumferential surface center is always positioned on the inner side with respect to the bush center. Thereby, in a vane compressor a vane is stably supported, wear at a tip of the vane is suppressed, loss due to sliding on bearings is reduced by supporting a rotating shaft portion with a small diameter, and accuracy in outside diameter and center of rotation of a rotor portion is increased.

Abstract: The properties of a lubricating oil are utilized to avoid excessive quality in terms of the circularity of roller members while reducing the noise from a radial roller bearing alone during rotation and thereby reducing the noise from a rotary machine. A radial roller bearing includes an outer ring member (30A), a plurality of roller members (30B), and a retainer, and a lubricating oil (0) is supplied between the outer ring member (30A) or a rotating shaft and the roller members (30B). The circularity (?R) of the roller members (30B) in a cross section perpendicular to a centerline (CL) thereof is set to be lower than or equal to the minimum oil film thickness (hmin) of an oil film formed by the lubricating oil (O).

Abstract: A vane-type compressor includes a rotor shaft that includes rotating shaft portions and a rotor portion, which are integrated with one another. A lower end of the rotating shaft is disposed in an oil reservoir. The vane-type compressor also includes vane aligners disposed at both end portions of vanes, and recess portions, which are respectively formed in a frame and a cylinder head so as to be concentric with an inner circumferential surface of a cylinder. Outer circumferential surfaces of the vane aligners are slidably supported by the recess portions. In the rotor shaft, oil supply channels, which allow communication between the oil reservoir and the recess portions of the frame and the cylinder head, and an oil pump, which supplies refrigerating machine oil in the oil reservoir to the oil supply channels, are provided.

Abstract: In a vane rotary compressor, a discharge valve on a discharge flow channel communicates an operating chamber in a compression element with a discharge hole. The discharge valve is pushed from an opening portion of a discharge valve groove to an outer circumferential surface of a roller by a high-pressure refrigerant when pressure in an operating chamber is lower than the pressure of the high-pressure refrigerant. The discharge valve is pushed back into the discharge valve groove by the refrigerant pressure in the operating chamber when the pressure in the operating chamber is higher than the pressure of the high-pressure refrigerant. The discharge flow channel is closed by the outer circumferential surface of the discharge valve pushed out from the opening portion of the discharge valve groove and the outer circumferential surface of the roller, and opens when the discharge valve is pushed back into the discharge valve groove.