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Title
Dynamic finite element analysis of rotor-shaft fastening into a heavy precise lathe

ISSN printed: 1733-8670, ISSN on-line: 2392-0378
Jakubowski, Andrzej1; Dounar, Stanislau2
URI: http://repository.scientific-journals.eu/handle/123456789/2668
2021-06-30
The results of finite element analysis of large machined rotor fastened into heavy precise lathe are reported. Many design changes are simulated to improve the dynamic rigidity of the machining. Three radial eigenmodes detrimental to the accuracy were revealed: rotor-stock bending at 17.7 Hz (“half-wave”), rotor-lathe bending at 36.1 Hz (“full-wave”), and “support rocking” at 68.1 Hz. The frequency response functions and dynamic rigidities were evaluated. Three compliance issues were revealed: angular flexibility of the spindle console, low stiffness of the lathe bed (with boots), and an excessively slender tailstock. It is proposed to transform the spindle chuck into a table with additional hydrostatic backing, fill the bed cavities with concrete, and redesign the tailstock as a counter-spindle unit. This will decrease the amplitude of the main rotor resonance by 6.3 times and upshift the frequency near two-fold from 17.7 to 35 Hz. The renovated lathe should be able to machine a rotor without a lunette system or overriding the main resonant frequency.
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Title

Dynamic finite element analysis of rotor-shaft fastening into a heavy precise lathe

Pages

Figures

7

Tables

5

ISSN printed

1733-8670

ISSN on-line

2392-0378

DOI

10.17402/467

Type

Original scientific article

Journal

66 Scientific Journals of the Maritime University of Szczecin, no. 66 / 2021

Publisher

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Copyright Holder

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Published

2021-06-30

Recieved

2019-10-22

Accepted

2020-04-19

Funding

No data

Keywords

finite element analysis (FEA), lathe, rotor, renovation, rigidity

URI:

http://repository.scientific-journals.eu/handle/123456789/2668

Language

English

Authors

Jakubowski, Andrzej1; Dounar, Stanislau2

Affiliation

1 Maritime University of Szczecin, Faculty of Marine Engineering, Wały Chrobrego 1-2, 70-500 Szczecin, a.jakubowski@am.szczecin.pl
2 Belarusian National Technical University, Mechanical Engineering Faculty 65 Nezalezhnasci St., 220127 Minsk, Belarus, a.jakubowski@am.szczecin.pl

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