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US 2015/0030490 A1Published application
Bearing Housing and Assembly of a Screw Compressor
AssigneeTrane International Inc.
InventorsDennis M. Beekman, Daniel R. Crum, Timothy Sean Hagen, Dennis R. Dorman, John R. Sauls
Life of this patent
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Abstract
An improved bearing housing of a rotary screw compressor is described. The bearing housing is generally shorter than a convention bearing housing. The bearing housing can be configured to enclose and support radial bearings of the screw compressor. The bearing housing can be configured not to enclose axial bearings of the screw compressor in an axial direction.
Claims9
A bearing housing of a screw compressor, comprising:
- a cavity defined by the bearing housing, wherein a depth of the cavity is configured to be no larger than a length of a radial bearing of a screw compressor.
A screw compressor, comprising:
- a rotor including a shaft;
- one or more radial bearings attached to the shaft;
- one or more axial bearings attached to the shaft;
- and
- a bearing housing, wherein the bearing housing defines a cavity that is configured to support the one or more radial bearings but not the one or more axial bearings.
2 more elements
A variable capacity screw compressor comprising:
- a rotor housing comprising a suction port,
- a working chamber,
- a discharge port, and
- at least two screw rotors that include a female screw rotor and a male screw rotor being positioned within the working chamber for cooperatively compressing a fluid;
- wherein the suction port, the at least two screw rotors and the discharge port being configured in relation to a selected rotational speed;
- the selected rotational speed operates at least one screw rotor at an optimum peripheral velocity that is independent of a peripheral velocity of the at least one screw rotor at a synchronous motor rotational speed for a rated screw compressor capacity;
- a motor operable to drive the at least one screw rotor at a rotational speed at a full-load capacity that is substantially greater than the synchronous motor rotational speed at the rated screw compressor capacity;
- and
- a variable speed drive to receive a command signal from a controller and to generate a control signal that drives the motor at the rotational speed.
6 more elements
Dependencies are inferred from the claim text.