Patent ID: 6312239
Filing Date: 2001-11-06
Classification: F01C,F04C

Abstract:
A screw-type compressor comprising a housing (12), said housing defining a compression chamber (27); a primary rotor (14) having a primary shaft (18) and a primary screw rotor (20), a secondary rotor (16) having a secondary shaft (24) and a secondary screw rotor (26), said primary screw rotor (20) and said secondary screw rotor (26) being in meshed relationship in said compression chamber (27), means supporting said shafts (18, 20) for rotation, said primary screw rotor (20) and said secondary screw rotor (26) each having a respective front face (88, 83), a thrust bearing (15) located between said primary screw rotor front end face (88) and an axially opposing face (66) of said housing (12) for countering axial thrust forces generated upon rotation of said screw rotors (20, 26), and said secondary screw rotor front end face (83) being in axial opposing contact with said thrust bearing (15) to thereby counter axial thrust forces of said secondary screw rotor (26).