Abstract: A package-type compressor includes a body unit, a controller, a casing, a first cooling air inlet, a second cooling air inlet, a cooling air outlet, a fan duct, a cooling fan, an air cooling type heat exchanger, a machine chamber, and a cooling duct. The cooling duct is provided below the fan duct, the cooling duct causing the cooling air taken in at the second cooling air inlet to flow along the controller toward the suction port of the fan duct. A vertical projection plane of the cooling fan overlaps the machine chamber and the cooling duct.

Abstract: Provided is a fluid machine configured such that liquid supplied to a working chamber from the outside of the fluid machine is dispersed extensively in the working chamber. This fluid machine is constituted of a screw rotor and a casing for accommodating the screw rotor and is provided with a liquid supply section for supplying liquid into a working chamber from the outside. The liquid supply section is configured so that liquid is dispersed in the longitudinal direction of the tooth groove of the screw rotor rather than in the width direction thereof.

Abstract: A package-type compressor includes a body unit, a controller, a casing, a first cooling air inlet, a second cooling air inlet, a cooling air outlet, a fan duct, a cooling fan, an air cooling type heat exchanger, a machine chamber, and a cooling duct. The cooling duct is provided below the fan duct, the cooling duct causing the cooling air taken in at the second cooling air inlet to flow along the controller toward the suction port of the fan duct. A vertical projection plane of the cooling fan overlaps the machine chamber and the cooling duct.

Abstract: Provided is a package-type compressor that can improve cooling performance for cooling a body unit and a control panel. The package-type compressor includes: a cooling fan accommodated in a fan duct to induce a flow of cooling air taken in through inlets and discharged through an outlet; a machine chamber that causes the cooling air taken in at the inlet to flow along a body unit; and a cooling duct that causes the cooling air taken in at the inlet to flow along the control panel. A center position of the suction port of the fan duct is offset away from the inlet and toward the inlet with respect to a center position of a drive shaft of a motor of the body unit.

Abstract: Provided is a package-type compressor that can improve cooling performance for cooling a body unit and a control panel. The package-type compressor includes: a cooling fan accommodated in a fan duct to induce a flow of cooling air taken in through inlets and discharged through an outlet; a machine chamber that causes the cooling air taken in at the inlet to flow along a body unit; and a cooling duct that causes the cooling air taken in at the inlet to flow along the control panel. A center position of the suction port of the fan duct is offset away from the inlet and toward the inlet with respect to a center position of a drive shaft of a motor of the body unit.

Abstract: A screw compressor includes: a male rotor 2 and a female rotor 3 including a rotor tooth section 21, 31 that has multiple helical teeth, the male rotor 2 and the female rotor 3 rotating in engagement with each other; a casing 4 including a main casing 41 with a bore 45 formed to accommodate the male rotor 2 and the female rotor 3, and a discharge-side casing 43 closing a discharge side of the bore 45; and a discharge passage 60 including a discharge port 61 that opens in a rotational axis direction of the male rotor 2 and the female rotor 3 on a bore side surface of the discharge-side casing 43, compressed gas flowing from the discharge port 61 circulating in the discharge passage 60. The male rotor 2 and the female rotor 3 are configured such that a discharge-side end surface 21a, 31a of the rotor tooth section 21, 31 serves as a discharge-side distal end of the male rotor 2 or the female rotor 3 in the rotational axis direction.

Abstract: There is provided a liquid feeding type screw compressor that can reduce size and weight and improve vibration insulation and sound insulation. A liquid feeding type screw compressor includes as components: a compressor main body; a motor driving the compressor main body; and a gas-liquid separator separating a liquid from a compressed air discharged from the compressor main body. The motor is arranged above the compressor main body. The gas-liquid separator is arranged below the compressor main body. A compressor main body casing constituting an inner cylindrical space forming a compression operation chamber together with the screw rotor and constituting the contour of the compressor main body and a casing constituting the contour of another component consist of an integrally molded single member.

Abstract: A screw compressor that enhances performance of a compressor main unit and a motor is provided. The screw compressor includes an oil-injected compressor main unit that compresses air with injecting oil in a compression chamber and an axial-gap motor that drives the compressor main unit. A male rotor of the compressor main unit has a suction-side shaft portion connected coaxially with a rotor shaft of the motor. The screw compressor further includes a suction-side bearing that rotatably supports the suction-side shaft portion of the male rotor. The suction-side bearing restricts axial movement of the suction-side shaft portion and bears a radial load and axial loads in both directions.

Abstract: Provided is a fluid machine configured such that liquid supplied to a working chamber from the outside of the fluid machine is dispersed extensively in the working chamber. This fluid machine is constituted of a screw rotor and a casing for accommodating the screw rotor and is provided with a liquid supply section for supplying liquid into a working chamber from the outside. The liquid supply section is configured so that liquid is dispersed in the longitudinal direction of the tooth groove of the screw rotor rather than in the width direction thereof.

Abstract: The objective of the present invention is to provide a scroll-type fluid machine for which the service life can be improved by reducing the load applied to a rotation prevention mechanism.

Abstract: There is provided a liquid feeding type screw compressor that can reduce size and weight and improve vibration insulation and sound insulation. A liquid feeding type screw compressor includes as components: a compressor main body; a motor driving the compressor main body; and a gas-liquid separator separating a liquid from a compressed air discharged from the compressor main body. The motor is arranged above the compressor main body. The gas-liquid separator is arranged below the compressor main body. A compressor main body casing constituting an inner cylindrical space forming a compression operation chamber together with the screw rotor and constituting the contour of the compressor main body and a casing constituting the contour of another component consist of an integrally molded single member.

Abstract: A screw compressor includes: a male rotor 2 and a female rotor 3 including a rotor tooth section 21, 31 that has multiple helical teeth, the male rotor 2 and the female rotor 3 rotating in engagement with each other; a casing 4 including a main casing 41 with a bore 45 formed to accommodate the male rotor 2 and the female rotor 3, and a discharge-side casing 43 closing a discharge side of the bore 45; and a discharge passage 60 including a discharge port 61 that opens in a rotational axis direction of the male rotor 2 and the female rotor 3 on a bore side surface of the discharge-side casing 43, compressed gas flowing from the discharge port 61 circulating in the discharge passage 60. The male rotor 2 and the female rotor 3 are configured such that a discharge-side end surface 21a, 31a of the rotor tooth section 21, 31 serves as a discharge-side distal end of the male rotor 2 or the female rotor 3 in the rotational axis direction.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: A scroll type fluid machine for improving compression efficiency while preventing contact between wrap sections of opposed scrolls, includes a first scroll member provided with a wrap section of a spiral shape on an end plate, a second scroll member disposed at a position opposed to the first scroll member and provided with a wrap section of a spiral shape on an end plate, cooling fins arranged on a back side surface of the end plate of at least one of the first scroll member and the second scroll member, and projected sections arranged on the wrap section of at least one of the first scroll member and the second scroll member, in which a difference of thicknesses in the radial direction of the wrap section at a distal end and a base end of the projected sections is changed depending on a position in a peripheral direction.

Abstract: The objective of the present invention is to provide a scroll-type fluid machine for which the service life can be improved by reducing the load applied to a rotation prevention mechanism.

Abstract: A scroll type fluid machine for improving compression efficiency while preventing contact between wrap sections of opposed scrolls, includes a first scroll member provided with a wrap section of a spiral shape on an end plate, a second scroll member disposed at a position opposed to the first scroll member and provided with a wrap section of a spiral shape on an end plate, cooling fins arranged on a back side surface of the end plate of at least one of the first scroll member and the second scroll member, and projected sections arranged on the wrap section of at least one of the first scroll member and the second scroll member, in which a difference of thicknesses in the radial direction of the wrap section at a distal end and a base end of the projected sections is changed depending on a position in a peripheral direction.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: To provide a higher sealing capability irrespective of the pressure difference between compression chambers, lips having leading ends extended toward the inner surface of a recessed groove are formed. At least some of the lips have a base end that is shaped to reduce rigidity against extension of the lips.

Abstract: A reciprocating compressor includes a piston which compresses air by, while rocking, reciprocatingly moving in a cylinder and a sealing member which is fitted in a groove formed on the piston for sealing between the cylinder and the piston. In the reciprocating compressor: the sealing member has a bottom portion to be fitted in the groove formed on the piston and a side portion provided radially outwardly of the piston; and the side portion includes a bent portion so as to reduce a gap between an upper end portion thereof and the piston.