US 12,449,017 B2
Method for actively balancing a rotor, and device comprising a rotor and a mechanism paired with the rotor for actively balancing same
Valentin Schreiner, Berlin (DE); Christian Hegger, Lemgo (DE); and Jürgen Maas, Detmold (DE)
Assigned to TECHNISCHE UNIVERSITÄT BERLIN, Berlin (DE)
Appl. No. 17/785,714
Filed by TECHNISCHE UNIVERSITÄT BERLIN, Berlin (DE)
PCT Filed Dec. 11, 2020, PCT No. PCT/DE2020/101052
§ 371(c)(1), (2) Date Jun. 15, 2022,
PCT Pub. No. WO2021/121474, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 10 2019 009 003.9 (DE), filed on Dec. 16, 2019.
Prior Publication US 2023/0057772 A1, Feb. 23, 2023
Int. Cl. F16F 15/36 (2006.01); F16F 15/18 (2006.01)
CPC F16F 15/366 (2013.01) [F16F 15/18 (2013.01); F16F 2222/06 (2013.01); F16F 2224/045 (2013.01); F16F 2230/0011 (2013.01); F16F 2232/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for actively balancing a rotor comprising:
providing a device with a rotor rotatable around an axis of rotation and a mechanism configured to actively balance the rotor, in which a magnetic fluid is received in a fluid chamber formed on the rotor, which partially fills the fluid chamber and contains at least one of the following fluids: ferrofluid and magnetorheological fluid;
holding the magnetic fluid by means of a permanent magnetic field of a permanent magnet arranged on the rotor in an initial position in the fluid chamber;
rotating the rotor around the axis of rotation, wherein several segmented areas are formed on the rotor, which each consist of an assigned permanent magnet and an assigned fluid chamber with magnetic fluid; and
passing the fluid chamber and the permanent magnet by an electrical exciter system with a fixedly arranged electromagnet during the rotation of the rotor, wherein the permanent magnetic field of the permanent magnet and an electromagnetic field of the electromagnet here overlap in an activated state for active balancing purposes, so that the magnetic fluid in the fluid chamber performs a mass displacement proceeding from the initial position.