Rotatable machine or centrifuge with driving motors in a simple casing

• US 7,041,044 B2
• Filed: 10/17/2003
• Issued: 05/09/2006
• Est. Priority Date: 05/19/2003
• Status: Expired due to Fees

• Current Assignee: Andritz-Guinard SAS
• Original Assignee: Andritz-Guinard SAS
• Inventors: Gilbert, Luc
• Primary Examiner(s): Cooley, Charles E.
• Application Number:
  US10/688,260
• Publication Number:
  US 20040232791A1
• Time in Patent Office: 935 Days
• Field of Search: 494 50- 54, 494/84, 494 7- 9, 210/380.1, 210/380.3, 310/156.01, 310/156.08, 310/156.11
• US Class Current: 494/53
• CPC Class Codes: B04B 1/2016 Driving control or mechanisms; Arrangement of transmission gearing
• CPC Class Codes: B04B 9/04 Direct drive
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06

Abstract

The rotatable machine (1) of the invention comprises a chamber (2) and a shaft (3), wherein the shaft (3) is mounted in the chamber (2) such that, upon rotation of the shaft (3) and the chamber (2), the shaft (3) and the chamber (2) each rotate about the same axis (4), and a first motor (20) for driving the chamber (2) and a second motor (30) for driving the shaft (3), each motor (20, 30) having an axis, wherein the axes of the first and second motors (20, 30) and the axis (4) of rotation of the chamber (2) and of the shaft (3) are coincident.

Claims

1. A rotatable machine (1) having first and second ends, said machine (1) comprising a chamber (2) and a shaft (3), said shaft (3) mounted in said chamber (2) such that, upon rotation of said shaft (3) and said chamber (2), said shaft (3) and said chamber (2) each rotate about the same axis (4), a first motor (20) for driving the chamber (2) and a second motor (30) for driving the shaft (3), each said motor (20, 30) having an axis, wherein the axes of the first and second motors (20, 30) and the axis (4) of rotation of the chamber (2) and of the shaft (3) are coincident, the first motor (20) and the second motor (30) are both permanent-magnet synchronous motors comprising permanent magnets (22, 32), wherein the first and the second motors (20, 30) are both located at the same end of the machine (1), the rotatable machine further comprising a casing (50) containing both said first and said second motors (20, 30) and first and second shafts (10, 11) adapted for driving the chamber (2) and the shaft (3), respectively, wherein said shafts (10, 11) are concentric and are push-fitted directly into corresponding rotors (21, 31) of the respective motors (20, 30).

2. The rotatable machine according to claim 1, wherein said machine is a centrifuge in which the chamber comprises a bowl and the shaft comprises an endless screw.

3. A centrifuge (1) having first and second ends, said centrifuge (1) comprising a bowl (2) and an endless screw (3), said endless screw (3) mounted in said bowl (2) such that, upon rotation of said bowl (2) and said endless screw (3) said endless screw (3) and said bowl (2) each rotate about the same axis (4), a first motor (20) for driving the bowl (2) and a second motor (30) for driving the endless screw (3), each said motor (20, 30) having an axis, wherein the axes of the first and second motors (20, 30) and the axis (4) of rotation of the bowl (2) and of the endless screw (3) are coincident, wherein the first motor (20) and the second motor (30) are each permanent-magnet synchronous motors comprising permanent magnets (22, 32), the first and second motors (20, 30) are both located at the same end of the centrifuge (1), the centrifuge further comprising a casing (50) containing both said first and said second motors (20, 30) and first and second shafts (10, 11) adapted for driving the bowl (2) and the endless screw (3), respectively, wherein said shafts (10, 11) are concentric and are push-fitted directly into corresponding rotors (21, 31) of the respective motors (20, 30).