Refining methods of vibration diagnostics of wear of turbo-prop engine differential speed reduction unit gear teeth

Abstract

The paper presents results of complex research of vibration behavior of the differential reduction gear unit of a turboprop engine on the basis of statistics of products with repaired reduction gears and those placed under repair. The conducted research made it possible to establish the source of resonant oscillations of the compressor design elements leading to their breakage. It is established that this source is determined by the kinematics of the reduction gear unit and is associated with the wear of its gear teeth.  Standards for the intensity of the appropriate discrete component of the reduction gear vibration spectrum and those for the amount of permissible wear are substantiated and established on the basis of the work carried out. A complex of diagnostic parameters of wear based on intensity components of the auto-spectrum and the spectrum of maxima, the depth of amplitude modulation in some narrow-band processes, their characteristics based on the parameters of the current frequency and mutual characteristics was identified. It is shown that for the whole complex of the diagnostic parameters obtained their dependence on the wear value is satisfactorily approximated by a linear characteristic. The obtained results can serve as a basis for the development of a complex of methods of differential reduction gear vibration diagnostics.

About the authors

A. A. Avramenko

Samara National Research University

Author for correspondence.
Email: avramenko@ssau.ru

Candidate of Science (Engineering)
Professor of the Department of Theoretical Mechanics

Russian Federation

A. N. Kryuchkov

Samara National Research University

Email: kan@ssau.ru

Doctor of Science (Engineering)
Professor of the Department of Power Plant Automatic Systems

Russian Federation

S. M. Plotnikov

Samara National Research University

Email: s_plotnikov@hotmail.com

Postgraduate Student

Russian Federation

E. V. Sundukov

Public Company Kuznetsov

Email: motor@kuznetsov-motors.ru

Candidate of Science (Engineering)
Head of the Integrated Research Laboratory

Russian Federation

A. E. Sundukov

Turbine SK LLC

Email: Sunduckov@mail.ru

Candidate of Science (Engineering)
Director

Russian Federation

References

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