Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces
Patent
1984-09-04
1985-12-03
Vrablik, John J.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
418189, F04C 1816, F04C 1818, F04C 2900
Patent
active
045563730
ABSTRACT:
An improved supercharger or blower (10) of the Roots-type with reduced airborne noise and improved efficiency. The blower includes a housing (12) defining generally cylindrical chambers (32, 34) containing meshed lobed rotors (14, 16) having the lobes (14a, 14b, 14c, 16a, 16b, 16c) thereon formed with an end-to-end helical twist according to the relation 360.degree./2n, where n equals the number of lobes per rotor. The chambers include cylindrical wall surfaces 20a, 20b and end wall surfaces 20c, 24a which sealing cooperate with top lands (14d, 14e, 14f, 16d, 16c, 16f) of the rotor lobes and end surface (14g, 14h, 16g, 16h) of the rotor ends. Spaces (32a, 34a) between adjacent lobes of each rotor transfer volumes of low-pressure air from an inlet port (36) defined by the housing (12) to relatively high-pressure air at an outlet port (38) defined by the housing. Associated with the outlet port are first and second expanding orifices (42, 44) disposed on transversely opposite sides of the outlet port for controlling the rate of backflow into the transfer volumes and operative at predetermined rotor speed and pressure differential relationships to maintain a substantially constant backflow rate into each of the transfer volumes. Pairs of recesses 46, 48 and 58, 60 are respectively formed in end walls 20c, 24a to damp pressure pulses in trapped volumes .SIGMA.TV.sub.1 and .SIGMA.TV.sub.2 defined by the meshing lobes. Recesses 46, 48 prevent compression of air in trapped volumes .SIGMA.TV.sub.1 and recesses 58, 60 prevent vacuum tending expansion of trapped volumes .SIGMA.TV.sub.2.
REFERENCES:
patent: 859762 (1907-07-01), Green
patent: 1719025 (1929-07-01), Scheminger, Jr.
patent: 1863160 (1932-06-01), Jensen
patent: 2014932 (1935-09-01), Hallett
patent: 2078334 (1937-04-01), Martocello
patent: 2463080 (1949-03-01), Beier
patent: 2480818 (1949-08-01), Whitfield
patent: 2578196 (1951-12-01), Montelius
patent: 3057543 (1962-10-01), Marsden
patent: 3121529 (1964-02-01), Hubrich
patent: 3275226 (1966-09-01), Whitfield
patent: 3531227 (1970-09-01), Weatherston
patent: 3667874 (1972-06-01), Weatherston et al.
patent: 3844695 (1974-10-01), Weatherston
patent: 4097206 (1978-06-01), Schonherr
patent: 4215977 (1980-08-01), Weatherston
Eaton Corporation
Grace C. H.
Rulon P. S.
Vrablik John J.
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