Original scientific paper

https://doi.org/10.17559/TV-20230120000249

Finite Element Analysis of a Shrink Fitted Disc-Shaft Rotating System

Marko Katinić ; Mechanical Engineering Faculty, University of Slavonski Brod Trg I. B. Mažuranić 2, 35000 Slavonski Brod, Croatia *
Domagoj Travica ; Mechanical Engineering Faculty, University of Slavonski Brod Trg I. B. Mažuranić 2, 35000 Slavonski Brod, Croatia
Pejo Konjatić ; Mechanical Engineering Faculty, University of Slavonski Brod Trg I. B. Mažuranić 2, 35000 Slavonski Brod, Croatia
Mladen Bošnjaković ; Technical Department, University of Slavonski Brod Trg I. B. Mažuranić 2, 35000 Slavonski Brod, Croatia

* Corresponding author.

Abstract

In this paper, the shrink fit between the conical disk and the rotor shaft of a steam turbine was analysed with the aim of determining the rotor speed at which this fit is lost. The analysis was carried out numerically using the finite element method (FEM) in the Ansys software package. Three design values of disc-shaft joint interference were considered: minimum, maximum and mean. The rotor speed at which the shrink fit is lost is the lowest for minimum interference and the highest for maximum interference, which was expected. In other words, the rotor speed at which the shrink fit is lost is a linear function of the amount of interference (the allowance). The results of the analysis showed that the considered interferences of the shrink fit ensured the smooth transmission of torque in the range of speeds up to the operating speed and that the operation of the turbine is safe from that point of view.

Keywords

conical disc; contact problem; finite element analysis; shaft; shrink fit

Hrčak ID:

309227

URI

https://hrcak.srce.hr/309227

Publication date:

25.10.2023.

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