Carrier Corporation

Yifan Qiu

Vishnu Mohan Sishtla

David M Rockwell

Amit Vaidya

Zaffir A Chaudhry

Ulf J Jonsson

Masao Akei

Charbel Rahhal

Scott M MacBain

Jeremy Wallet-Laily

Nicolas Fonte

Benjamin J Blechman

Brandon Schwoeppe

David Okhman

Joshua S Lavoie

Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; a fluid being disposed in the compression chamber, the fluid consisting of a working fluid for providing lubrication to each rotor; a first port extending through the housing and configured for directing the fluid toward the compression chamber; and when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotor.

Direct drive refrigerant screw compressor with refrigerant lubricated rotors

A screw compressor includes an outlet housing. The outlet housing includes a passage that is configured to communicate compressed fluid from a screw rotor to a discharge. A removable cover plate is configured to cover a portion of the passage. A method of varying a volume index for a screw compressor is also disclosed.

Screw compressor with adjustable passage

Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; wherein, for each rotor, the compressor includes: a plurality of bearing packs disposed within a respective plurality of bearing chambers; a working fluid disposed within each of the plurality of bearing chambers, the working fluid providing oil-free lubrication to the plurality of bearing packs; a plurality of bearing lubrication ports extending through the housing and into each of the plurality of bearing chambers, and configured for injecting the working fluid into each of the plurality of bearing chambers when the compressor is running.

Direct drive refrigerant screw compressor with refrigerant lubricated bearings

A refrigeration system includes a compressor for compressing a refrigerant, a condenser for cooling the refrigerant, an evaporator for heating the refrigerant, and a lubrication system for providing a lubricant mist to a movable component of the compressor. The lubrication system includes an ejector arranged in fluid communication with the compressor and the evaporator, wherein the lubricant mist is carried by the refrigerant to the movable component.

Enhanced method of lubrication for refrigeration compressors

In a screw compressor (), a male rotor suction end bearing () and discharge end bearing () mount the male rotor suction end shaft portion () and discharge end shaft portion (). A female rotor suction end bearing () and discharge end bearing () mount the female rotor suction end shaft portion () and discharge end shaft portion (). At least one valve (------) is along a lubricant flowpath and has an energized condition and a de-energized condition. At least one restriction (-----------) is along the lubricant flowpath. The at least one valve and the at least one restriction are positioned to create a lubricant pressure difference biasing the rotors away from a discharge end of the case.

Screw compressor with oil shutoff and method

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Manlius, NY, United States of America

Yifan Qiu