Rotary positive displacement machines

Details Rotary positive displacement machines Rotary positive displacement machines

F - Mech Eng,Light,Heat,Weapons

01

C

230/98

F01C 1/08 (2006.01) F01C 1/12 (2006.01)

Patent

CA 1112224

ROTARY POSITIVE DISPLACEMENT MACHINES Abstract of the Disclosure The machines may function as a rotary compressor, vacuum pump, expansion engine, or the like. Two interengaging rotors rotate within intersecting bores in a casing structure. Two higher pressure ports are located one in each flat end wall of the casing. One rotor opens and closes the two higher pres- sure ports so as to control the flow of air or gas through same. The optimum number of teeth or lobes for each rotor is two. The port controlling first rotor has lobes of small included angle so as to reduce the effect of a precompression loss. The coacting second rotor has lobes of larger included angle so as to improve performance.

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