Partner: Paulina Kurnyta-Mazurek

Military University of Technology (PL)

Recent publications
1.Szolc T., Falkowski K., Henzel M., Kurnyta-Mazurek P., Determination of parameters for a design of the stable electro-dynamic passive magnetic support of a high-speed flexible rotor, BULLETIN OF THE POLISH ACADEMY OF SCIENCES: TECHNICAL SCIENCES, ISSN: 0239-7528, DOI: 10.24425/bpas.2018.125719, Vol.67, No.1, pp.91-105, 2019
Abstract:

Electro-dynamic passive magnetic bearings are now viewed as a feasible option when looking for support for high-speed rotors. Nevertheless, because of the skew-symmetrical visco-elastic properties of such bearings, they are prone to operational instability. In order to avoid this, the paper proposes the addition of external damping into the newly designed vibrating laboratory rotor-shaft system. This may be achieved by means of using simple passive dampers that would be found among the components of the electro-dynamic bearing housings along with magnetic dampers, which satisfy the operational principles of active magnetic bearings. Theoretical investigations are going to be conducted by means of a structural computer model of the rotor-shaft under construction, which will take into consideration its actual dimensions and material properties. The additional damping magnitudes required to stabilize the most sensitive lateral eigenmodes of the object under consideration have been determined by means of the Routh-Hurwitz stability criterion.

Keywords:

rotor-dynamics, electrodynamic passive magnetic bearings, flexible rotor-shaft, active magnetic damper, stability analysis

Affiliations:
Szolc T.-IPPT PAN
Falkowski K.-Military University of Technology (PL)
Henzel M.-Military University of Technology (PL)
Kurnyta-Mazurek P.-Military University of Technology (PL)
2.Kurnyta-Mazurek P., Kurnyta A., Pręgowska A., Kaźmierczak K., Frąś L.J., Application concept of the active magnetic suspension technology in the aircraft engine, Aviation Advances & Maintenance, ISSN: 2543-9456, DOI: 10.2478/afit-2018-0006, Vol.41, No.1, pp.161-193, 2018

Conference papers
1.Szolc T., Falkowski K., Henzel M., Kurtyna-Mazurek P., Passive and active stabilization of the electro-dynamic magnetic bearings supporting high-speed rotors, VITM 11, Vibrations In Rotating Machinery, IMechE, 2016-09-13/09-15, Machester (GB), pp.721-731, 2016
Abstract:

The electrodynamic passive magnetic bearings became now a very promising kind of support for high-speed rotors. Nevertheless, because of skew-symmetrical visco-elastic properties of such bearings, they are sensitive to operational instability. In order to avoid this disadvantage, in the paper there are proposed stabilization concepts reducing to an introduction of a sufficient magnitude of additional external damping into the vibrating rotor-shaft system. This purpose is going to be realized by means of simple and effective passive dampers built in the electrodynamic bearing housings as well as using heteropolar magnetic dampers which realize operational principles of the active magnetic bearing. The theoretical investigations are going to be carried out by means of a structural computer model of the rotor-shaft system, taking into consideration its full geometry and material properties.

Affiliations:
Szolc T.-IPPT PAN
Falkowski K.-Military University of Technology (PL)
Henzel M.-Military University of Technology (PL)
Kurtyna-Mazurek P.-Military University of Technology (PL)