Increase of reliability and tribological characteristics of gyroscopes

• Autorzy: Kovalev E. , Ignatiev M. , Wisniewska-Weinert H. , Leshchynsky V.
• Języki publikacji: EN

Abstrakty

EN

Now gyroscopic devices are applied in many industrial areas. Alongside with traditional mechanical gyroscopes, the increasing weight is got by systems of mechanical group realizing more perfect principles of their construction, such as gyroscopes with non-contact levitating rotor. However, complication of gyroscopic devices entails a number of problems which are not solved till now. One of the most critical problems is reliability of a rotor and stator at an emergency situation. This situation is characterized by "landing" of a rotor on stator. It leads to destruction of elements of stator because of high tangential loading (friction coefficient of ferrite is more than 0.25). Special coatings for ferrite materials have been developed to decrease friction coefficient (to 0.07) and to provide stator and rotor reliability even under emergency situation: amorphous (Al-Si)N magnetron coating and coating based on MoS2 nanoparticles with polymer binder. Tests of the developed coating was realised in vacuum [...] at loading 1-5 MPa and sliding velocity of 0.2-1.0m/s. The test results show that problem of durability of gyroscopes with non-contact levitating a rotor can be successfully solved with the help of new coatings.

Słowa kluczowe

EN

gyroscope; nanoparticles; solid lubricant coating; friction coefficient; wear intensity

PL

wibracje; wytrzymałość materiałów

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2006
• Tom: Vol. 11, no 3
• Strony: 501--506
• Opis fizyczny: Bibliogr. 6 poz., tab., wykr.

Twórcy

autor

Kovalev E.

autor

Ignatiev M.

autor

Wisniewska-Weinert H.

autor

Leshchynsky V.

• A.A. Baikov's Institute of Metallurgy and Material Science Moscow, RUSSIA

Bibliografia

• Hartog J.P.D. (1985): Mechanical vibrations. - Dover Publications, pp.436.
• Hartog J.P.D. (1987): Advanced Strength of Materials. - Dover Publications, pp.388.
• Kovalev E., Ignatiev M., Leshchynsky V. and Wisniewska-Weinert H. (2005): Friction and wear of dissusion MoS2 solid lubricant coatings. - Operation Problems 2/2005 (57) ISSN 1232-9312 pp.171-180.
• Magnus K. (1974): Gyroscope: theory and applications. - M.: Mir, pp.526.
• Thomson W.T. and Dahleh M.D. (1997): Theory of Vibration with Applications. - 5th Edition, Prentice Hall, pp.5-23.
• Weaver W., Timoshenko S.P. and Young D.H. (1990): Vibration Problems in Engineering. - 5Th Edition, Published in Jan 1990 by Wiley US, pp.624.