Thread construction for rotary worm compressor- expansion...

Details Thread construction for rotary worm compressor- expansion... Thread construction for rotary worm compressor- expansion...

F - Mech Eng,Light,Heat,Weapons

04

D

230/38

F04D 19/00 (2006.01) F01C 3/02 (2006.01)

Patent

CA 1101390

ABSTRACT OF THE DISCLOSURE A rotary worm fluid working machine in which a casing enclosed rotor, cooperable with one or more rotary pinions, is provided with a plurality of spiral thread grooves each having convergent side surfaces so that teeth on the pinion wheel enter the thread grooves with a clearance diminishing to contact prior to tooth exit. The clearance reduces shock loading on the pi- nion wheel and reduces pinion wheel tooth seal wear in conical worm machines due to relatively lower rotor-pinion wheel tooth velocities in the region of tooth seal-rotor contact.

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