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US 10,738,781 B2Granted
Active clearance management in screw compressor
AssigneeTrane International Inc.
InventorsJay H. Johnson, Steven Lotspaih
Life of this patent
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Abstract
A compressor includes a housing defining a working chamber. The housing further includes a bore and an endplate disposed toward a discharge end. The compressor further includes a rotor having helical threads, the rotor being configured to be housed in the bore, a rotor clearance, a controllable bearing supporting the rotor, and a controller configured to control the controllable bearing such that the controllable bearing moves the rotor in a manner to reduce and/or enlarge the rotor clearance.
Claims8
A heating, ventilation, and air conditioning (HVAC) system, comprising,
- a fluidically connected fluid circuit including,
- a condenser,
- an expansion device disposed downstream of the condenser,
- an evaporator disposed downstream of the expansion device,
- a compressor disposed downstream of the evaporator and upstream of the condenser, the compressor including,
- a housing,
- two bores within the housing,
- an endplate disposed toward a high pressure end,
- two rotors having intermeshing helical threads, each of the rotors being configured to be housed in one of the bores,
- a rotor-to-rotor clearance defined between the two rotors,
- a rotor-to-bore clearance defined between one of the rotors and an interior surface of the bores,
- a rotor-to-endplate clearance defined between the one of the rotors and the endplate,
- a controllable bearing supporting one of the two rotors, and
- a controller configured to control the controllable bearing such that the controllable bearing moves the one of the two rotors in a manner to reduce or enlarge the rotor-to-rotor, rotor-to-bore, or rotor-to-endplate clearances.
11 more elements
Dependencies are inferred from the claim text.