Hitachi Industrial Equipment Systems Co., Ltd.

Kosuke Sadakata

Toshikazu Harashima

Masahiko Takano

Hitoshi Nishimura

Kentaro Yamamoto

Kazutaka Suefuji

Takeshi Tsuchiya

Koichi Tashiro

Yoshio Kobayashi

Kotaro Chiba

Kiminori Iwano

Hiroaki Saito

Shumpei Yamazaki

Masanao Kotani

Daichi Oka

Ryoji Kawai

Minako Kanada

Makoto Yuki

A package type fluid machine includes a plurality of compressor bodies; a machine compartment in which the plurality of compressor bodies are disposed; an exhaust duct that exhausts a cooling gas from the machine compartment; a plurality of aftercoolers that are disposed inside the exhaust duct to cool a compressed fluid from the compressor bodies; and a shield that is disposed between the aftercoolers to shield a flow of the cooling gas.

Package type fluid machine

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.

Package-type compressor

A scroll-type fluid machine includes a fixed scroll, an orbiting scroll, a drive shaft, a cooling fan, and a cooling air duct. In a bent portion, immediately adjacent to the cooling fan, where a direction of the cooling air duct is changed from a direction perpendicular to the drive shaft to a direction of the drive shaft, a part of an outer peripheral wall which is distant from the drive shaft is planar and defines a plane which intersects a plane perpendicular to the drive shaft at an obtuse angle. With this configuration, a main stream of the cooling air is prevented from separating from an inner peripheral wall of the bent portion.

Scroll-type fluid machine with cooling fan including a peripheral wall configured to minimize vortices

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.

Fluid machine

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.

A screw compressor includes: a male rotorand a female rotorincluding a rotor tooth sectionthat has multiple helical teeth, the male rotorand the female rotorrotating in engagement with each other; a casingincluding a main casingwith a boreformed to accommodate the male rotorand the female rotor, and a discharge-side casingclosing a discharge side of the bore; and a discharge passageincluding a discharge portthat opens in a rotational axis direction of the male rotorand the female rotoron a bore side surface of the discharge-side casing, compressed gas flowing from the discharge portcirculating in the discharge passage. The male rotorand the female rotorare configured such that a discharge-side end surfaceof the rotor tooth sectionserves as a discharge-side distal end of the male rotoror the female rotorin the rotational axis direction. The discharge passageincludes an enlarged flow passage sectionformed such that the enlarged flow passage sectionextends from the discharge portin the rotational axis direction of the male rotorand the female rotorand that a flow passage cross-sectional area is gradually enlarged from the discharge portto a downstream side in a compressed gas flow direction.

Screw compressor having a discharging passage with enlarged cross section area

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.

Liquid feeding type screw compressor

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. To solve this problem, this scroll-type fluid machine is characterized by being equipped with a stationary scroll, an orbiting scroll that is provided opposing the stationary scroll and undergoes turning movement, a casing provided on the outside of the orbiting scroll, a drive shaft that drives and turns the orbiting scroll, a boss plate part that is provided separated from the orbiting scroll and is connected to the drive shaft, and multiple rotation prevention mechanisms provided between the boss plate part and the casing, and is characterized in that the boss plate part has multiple rotation-prevention-mechanism-side boss plate parts connected to the rotation prevention mechanisms, and a drive-shaft-side boss plate part connected to the drive shaft, and spaces are provided between the rotation-prevention-mechanism-side boss plate parts and the drive-shaft-side boss plate part.

Scroll-type fluid machine

A fluid machine includes a piston, a valve seat plate, a valve, and a valve retainer that reduces an opening amount of the valve. One end of the valve retainer is fixed with a fastener together with the valve to the valve seat plate. The fastener spans through the one end of the valve retainer and the valve to thereby fasten the one end of the valve retainer and the valve to the valve seat plate. A second end of the valve retainer that is opposite to the one end does not contact the valve seat plate.

A scroll fluid machine having: a compressor body including a fixed scroll and an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting; a drive shaft connected to the orbiting scroll; a cooling fan provided on another side of the drive shaft opposite to the orbiting scroll, the cooling fan generating a cooling wind; and a cooling wind passage surrounded by walls in all directions, the cooling wind passage sending the cooling wind of the cooling fan to the compressor body, when the cooling wind passage being disposed left and the drive shaft being disposed right when seen from a direction in which the drive shaft extends, a size of the cooling wind passage in the left and right directions being smaller in upstream than downstream of the cooling wind passage.

Growing community of inventors

Tokyo, Japan

Kosuke Sadakata