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US 12,410,799 B2Granted
Secondary airflow paths for air compressors
AssigneeDoosan Bobcat North America, Inc.
InventorsDavid Rowe, Tuan Diep
Life of this patent
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Abstract
A secondary airflow path can be provided for a compressor of a compressor system. The secondary airflow path can provide pressurized air to a boost port in communication with a closed compression cell of the compressor.
Claims16
An air compression system comprising:
- a separator tank;
- a service air outlet that is in fluid communication with the separator tank to supply compressed service air for work operations;
- a first compressor in fluid communication with the separator tank, the first compressor including:
- a first rotor;
- a second rotor meshed with the first rotor;
- and
- a housing structure that defines:
- an air inlet;
- an air outlet;
- a compression chamber that encloses the first and second rotors, the compression chamber including a radial cut-off arranged to successively close compression cells formed by the first and second rotors, during rotation of the first and second rotors, for compression of air within the compression cells and delivery of the compressed air from the compression cells to the air outlet;
- and
- a boost port in fluid communication with the compression chamber to direct pressurized air into the compression cells downstream of the radial cut-off, the boost port being in communication with the compression chamber along an axial length of the radial cut-off;
- and
- a second compressor arranged to provide the pressurized air to the boost port.
11 more elements
A method of operating an air compression system, the method comprising:
- powering a compressor to receive air at an air inlet of a housing structure of the compressor, wherein powering the compressor includes powering rotation of a first rotor and a second rotor meshed with the first rotor within a compression chamber to successively close compression cells formed by the first and second rotors, for compression of air within the compression cells and delivery of the compressed air via an air outlet of the housing structure, to supply compressed service air for work operations;
- pressurizing boost air using an auxiliary compressor separate from the compressor;
- and
- providing the pressurized boost air to a boost port in fluid communication with the compression chamber downstream of a radial cut-off of the compression chamber, the boost port entering the compression chamber along an axial length of the radial cut-off.
1 more element
An air compression system comprising:
- an oil-flooded rotary screw compressor that includes:
- a first rotor;
- a second rotor meshed with the first rotor;
- and
- a housing structure that defines:
- an air inlet;
- an air outlet;
- a compression chamber that encloses the first and second rotors, the compression chamber including a radial cut-off arranged to successively close compression cells formed by the first and second rotors, during rotation of the first and second rotors, for compression of air within the compression cells and delivery of the compressed air from the compression cells to the air outlet;
- and
- a boost port in fluid communication with the compression chamber to direct pressurized air into the compression cells downstream of the radial cut-off, the boost port being located along an axial length of the radial cut-off;
- and
- a boost compressor that provides the pressurized air to the boost port.
9 more elements
Dependencies are inferred from the claim text.