Patent
Oil free screw compressor
Hitoshi Nishimura,Akira Suzuki +1 more
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TLDR
In this paper, a screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having an asymmetric female tooth shape meshing with the male rotor.Abstract:
A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided within the compressor main body. A motor casing is operably connected to the compressor main body, and a high speed electric motor provided within the motor casing. The motor includes a motor rotor, a motor stator and a motor shaft for driving at least one of the male and female rotors. A speed ratio of the motor shaft and the at least one of the male and female rotors driven by the motor shaft is in a range of 2:1 to 1:2.read more
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Patent
Oilless screw compressor
TL;DR: An oilless screw compressor incorporating water-cooled cooling units for cooling compressed air discharged from compressor bodies having a pair of male and female screw rotors which can be rotated in a contactless and olless manner is presented in this article.
Patent
Method and apparatus for attenuating compressor noise
TL;DR: In this article, the authors proposed a method and apparatus for reducing the noise generated by compressors, including Roots-type blowers, in a portable ventilator housing, by folding a gas flow path to fit into a limited space.
Patent
Water-injected screw compressor
TL;DR: In this paper, a water-injected screw compressor and an electric motor are shown to be coupled to or formed one piece with the rotor shaft of the motor by means of water-lubricated slide bearings.
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Air-Conditioning apparatus
TL;DR: In this paper, an air conditioning apparatus is capable of being mounted on the ceiling of an air-conditioned room and includes a casing in which an intake port is formed in a bottom surface, a filter provided in the intake port, a cleaning mechanism for removing dust collected by the filter from the filter, and a dust box provided at the bottom of the casing to collect dust removed by the cleaning mechanism.
Patent
Air-cooled oil-free rotary-type compressor
Aoki Masakazu,Akira Suzuki +1 more
TL;DR: An air-cooled oil-free rotary-type compressor as discussed by the authors includes a first air cooler including a plurality of cooling pipes, a check valve, and a second air cooler.
References
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Mechanical engineering design
TL;DR: In this paper, the authors discuss failure prevention of failure due to static loading and fatigue failure resulting from variable loading in the design of non-permanent joint components, such as screw heads, fasteners, and nonpermanent joints.
Patent
Scroll-type compressor
TL;DR: In this article, an adjusting mechanism was provided to produce an anti-overturning moment to reduce an overturning moment acting on an orbiting scroll during its revolution in a rotating-angle area.
Patent
Screw vacuum pump
TL;DR: In this article, a screw vacuum pump is simplified by disposing of a discharge opening in the vertically downward direction, disposing two discharge openings which communicate with the discharge opening, and enabling the piping to discharge opening being easy to be worked corresponding to the arrangement of the vacuum pump.
Patent
Operation control system of rotary displacement type vacuum pump
TL;DR: An operation control system of a rotary displacement type vacuum pump capable of reducing a starting torque of the vacuum pump includes a suction regulating valve and a pressure sensor, an inverter electrically coupled to a variable speed electric motor, and a control unit as discussed by the authors.
Patent
Screw fluid machine and screw gear used in the same
Masayuki Ozaki,Akutsu Isao +1 more
TL;DR: In this article, the screw gear is designed so that the peripheral length of a pitch cylinder in a helix advance direction on a development of a tooth-trace rolling curve on the pitch cylinder of a screw gear can be expressed by a substantially monotonically increasing function.