Prospective lines of improving the process of evaluating the technical condition of aircraft hydraulic system working fluid

Abstract


The article is devoted to the evaluation of the technical condition of aircraft hydraulic system working fluids. Working fluid parameters (concentration of impurities, viscosity, density, anti-oxidation, anti-wear and thermal properties) determining its technical condition are selected on the basis of a study of scientific and technical literature. The peculiarities of the existing process of its evaluation are discussed. A structural grapho-analytical model reflecting the condition of the working fluid was developed. The model takes into account the influence of the fluid’s basic parameters as well as reachability and counter-reachability matrices. Analyzing the results, it was found that the graph components are strongly interconnected. Viscosity is closely linked with anti-wear and thermal properties, while variations in mechanical impurity content in the working fluid cause variations in the rest of its parameters. Thus, we can say that the assessment of the working fluid’s condition based on measuring only its purity and viscosity is not quite reliable. We substantiate the future line of research with the aim of developing new methods to assess the condition of the working fluid, namely, development of mathematical models of the working fluid condition taking all its components into account.


About the authors

A. N. Koptev

Samara National Research University

Author for correspondence.
Email: eat@ssau.ru

Russian Federation

Doctor of Science (Engineering)

Professor of the Department of Aircraft Maintenance

A. M. Gareyev

Samara National Research University

Email: gareevalbert@mail.ru

Russian Federation

Candidate of Science (Engineering)

Associate Professor of the Department of Aircraft Maintenance

I. A. Popelnyuk

Samara National Research University

Email: gareevalbert@mail.ru

Russian Federation

Postgraduate student of the Department of Aircraft Maintenance

References

  1. Kondakov L.A. Rabochie zhidkosti i uplotneniya gidravlicheskikh system [Hydraulic fluids and seals]. Moscow: Mashinostroenie Publ., 1982. 216 p.
  2. Timirkeev R.G., Sapozhnikov V.M. Promyshlennaya chistota i tonkaya fil'tratsiya rabochikh zhidkostey letatel'nykh apparatov [Industrial purity and fine filtration of aircraft hydraulic fluids]. Moscow: Mashinostroenie Publ., 1986. 152 p.
  3. Fitch E.C. Fluid contamination control. Oklahome: FES Inc., 1988. 433 p.
  4. Gareev A.M., Tits S.N. Uprezhdayushchee obsluzhivanie gidravlicheskikh system letatel'nykh apparatov [Proactive maintenance of aircraft hydraulic systems]. Samara: Samarskiy Nauchnyy Tsentr RAN Publ., 2010. 112 p.
  5. Gareyev A.M., Popelniuk I.A. Investigation of the seizing mechanism of aviation hydraulic drive spool-and-sleeves. Vestnik of the Samara State Aerospace University. 2015. V. 14, no. 2. P. 59-69. (In Russ.). doi: 10.18287/2412-7329-2015-14-2-59-69
  6. Nikitin O.F. Rabochie zhidkosti gidroprivodov. Klassifikatsiya, svoystva, rekomendatsii po vyboru i primeneniyu [Pressure fluids of hydraulic drives. Classification, properties, selection and application guidelines]. Moscow: Bauman Moscow State Technical University Publ., 2007. 152 p.
  7. Kristofides N. Teoriya grafov. Algoritmicheskiy podkhod [Graph theory. Algorithmic approach]. Moscow: Mir Publ., 1978. 432 p.

Statistics

Views

Abstract - 65

PDF (Russian) - 37

Article Metrics

Metrics Loading ...

PlumX

Dimensions

Refbacks

  • There are currently no refbacks.

Copyright (c) 2017 VESTNIK of Samara University. Aerospace and Mechanical Engineering

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies