Patent ID: 6626814
Filing Date: 2003-09-30
Classification: B04B

Abstract:
A drive unit (1) for a centrifuge rotor (2) of a centrifugal separator, comprising a drive shaft (3), arranged to support said centrifuge rotor (2) and rotatably journalled around an axis (z) of rotation, a casing (6), which forms an inner space for the drive shaft (3), a drive motor shaft (9) which is provided outside the casing (6) and connected to the drive shaft (3) by means of a transferring member (11) extending through a first passage (12) in the casing (6), at least one shielding member (23), which is provided inside the casing (6) in such a manner that the part of the transferring member (11) which is located inside the casing (6) is shielded from the inner space, and wherein the shielding member (23) forms a channel (25), which extends through the casing (6) and is shielded from the inner space of the casing (6); andwherein the shielding member (23) includes an upper opening (26) and a lower opening (27), and the drive shaft (3) extends through the shielding member (23) through the upper and lower openings (26, 27); and wherein sealing member (28, 31) are provided between the drive shaft (3) and said upper and lower openings (26, 27).