Patent ID: 6578670
Filing Date: 2003-06-17
Classification: B04B,F16C

Abstract:
A centrifugal separator comprising a centrifuge rotor (2) and a drive unit (1) for the centrifuge rotor (2), said drive unit (1) comprising a drive shaft (3) arranged to carry said centrifuge rotor (2) and rotatably journalled in at least one bearing member (4) about a substantially vertical axis (z), a casing (6) which delimits an upper space (7) in which the drive shaft (3) and said bearing member (4) are located, a lower space (8) for storing oil, first means (18, 19, 20) arranged to create a flow of air acting with said oil to form an oil mist and to bring this oil mist to flow through said bearing member (4) for cooling and lubricating thereof, and second means (14, 16, 17) arranged to cool said oil mist by transporting a substantial part of said oil mist from an outlet of said bearing member (4) through at least one passage (17) extending in heat transferring contact with a surrounding space outside the casing (6) to the lower space (8).