Study of Vibrational and Mechanical Properties of Pre-Tensioned Banded Stator Blades of an Axial Compressor-Reference-Cited by-同舟云学术

Study of Vibrational and Mechanical Properties of Pre-Tensioned Banded Stator Blades of an Axial Compressor

Published:2022-03 Issue:3 (744) Volume: Page:96-102
ISSN:0536-1044
Container-title:Proceedings of Higher Educational Institutions. Маchine Building
language:
Short-container-title:PoHEI.MB

Author:

Sedunin V.A.¹,Marchenko Yu.G.¹,Melikhov I.V.²,Kalinin I.A.¹,Antropov D.V.¹

Affiliation:

1. Ural Federal University named after the first President of Russia B.N.Yeltsin

2. JSC «The Ural Turbine Works»

Abstract

The article considers the effect of the stator blade tension of an axial compressor on blade vibration and mechanical properties. Attention is paid to modeling the stress-strain state of a pre-tensioned blade and calculating the strength of the developed model as well as modal analysis. A method of stator blade pre-tensioning is proposed: the blade root is fixed in the groove of the body, and fitting into the shroud ring is made with a gap providing the blades with the necessary space for stretching. The tension is adjusted by changing the position of the tightening nut. Nuts are tightened evenly around the circumference. The proposed method allows increasing the rigidity of the stator blades and, consequently, reducing their thickness in order to improve aerodynamic performance while maintaining vibration-frequency characteristics. The pre-tension has the greatest influence on bending shapes. The ability to regulate the natural vibration frequencies of the stator blade in a wide range allows avoiding resonance.

Publisher

Bauman Moscow State Technical University

Subject

General Engineering

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