Rotary expansible chamber devices – Axially moving vane or abutment – Sliding
Patent
1986-07-09
1988-05-31
Croyle, Carlton R.
Rotary expansible chamber devices
Axially moving vane or abutment
Sliding
418233, 123244, F02B 5300
Patent
active
047477644
ABSTRACT:
The invention is fluid pump which in addition to displacing fluid can be a fluid driven motor and when the fluid is compressible a compressor or expanding fluid driven motor. The pump has an annular cavity formed between its rotor and casing and around the rotor rotational axis. There is a power transfer means such as a shaft which drives the rotor in rotation when the pump is used to displace or also to compress a fluid. When the pump is used also as a motor the fluid being displaced is also the power transfer means and the rotor shaft is used for mechanical power take-off. The rotor surface at the annular cavity, the wave surface, has at least one undulation and each wave surface undulation forms with the other cavity surfaces a cavity undulation. A casing surface at the annular cavity, the face surface, has a plurality of circumferential spaced axial plane slots each with a partition pivotally extending into the annular cavity but not abutting the annular cavity walls. The partitions in the annular cavity form a plurality of circumferential spaced volume varying chambers which cyclically vary in volume during their traverse of the cavity undulation(s) with rotor rotation. With rotor rotation, the partitions are displaced in their slots by a rotor cam means outside the annular cavity with undulations which maintain the continuous pivotal extension of the partitions into the annular cavity towards without abutting its surfaces. Where neighbor cavity undulations join there is a sump region of the annular cavity. Each said sump region extends from the exhaust region of one cavity undulation to the neighboring cavity undulation's intake region and volume varying chambers traversing the sump regions have minimum volumes. Each annular cavity undulation in the pump is comprised of (in the direction of volume varying chamber traverse): a sump region segment at its beginning, then an intake region with intake means, then a fluid transfer region, then an exhaust region with exhaust means, and then a sump region segment at its end. In the annular cavity's fluid transfer and the sump regions the partitions are extended to very close proximity with cavity walls. In the pump's operation each volume varying chamber traversing a cavity undulation conveys fluid from the cavity undulation's intake means at its intake region across its fluid transfer region to its exhaust means at its exhaust region. When the fluid is compressible, and the pump is also an (expanding) fluid motor the fluid in a volume varying chambers in the fluid transfer region works on the rotor. When the pump is also a compressor the rotor works on the fluid in the fluid transfer region compressing it. The power loss in the pump due to the allowed mass flow between neighboring volume varying chambers is sustained in the invention rather then the power loss and wear of the parts that occur if the partitions have wiping abutment with the cavity walls.
REFERENCES:
patent: 717244 (1902-12-01), Morgan
patent: 1999339 (1935-04-01), Morgan
patent: 3762844 (1973-10-01), Isaksen
patent: 3769945 (1973-11-01), Kahre
patent: 3790314 (1974-02-01), Swain
patent: 3838954 (1974-10-01), Rapone
patent: 4137890 (1979-02-01), Wohl
patent: 4437823 (1984-03-01), Tigane
patent: 4653446 (1987-03-01), Frasca
Croyle Carlton R.
Obee Jane E.
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