Experimental study of compact gas-dynamic bearings in the presence of foreign particles on the working surfaces

The paper considers the cases when gyroscopes with rotor gas-dynamic bearings (GDB) including a dynamically tuned gyroscope (DTG) with compact GDBs fail to operate due to the torque characteristics such as a device unstart, which is associated with contaminants and foreign particles on the working surfaces of GDBs. The paper presents the results of the research into such contaminants which is carried out using the scanning electron microscope with an X-ray energy dispersive micro analyzer. To identify the foreign particles on the working surfaces of GDBs by Raman spectroscopy, a comparative analysis of the contaminants and samples of organic substances is performed. The latter are used in the manufacture of both GDB parts and assembly units of DTG. It was found out that the contaminants consist of the material of organic origin, and they are likely to be a binder of finishing pastes used in the manufacture of GDB parts for machining wear-resistant work surface coatings.

References

[1] Pinegin S.V., Petrov V.P., Gudchenko V.M. Issledovanie materialov dlya podshipnikov s gazovoy smazkoy [Research in Materials for Gas Lubricated Bearings]. Moscow, Nauka Publ., 1975. 48 p.

[2] Nikitin E.A., Shestov S.A., Matveev V.A. Giroskopicheskie sistemy. Ch. III. Elementy giroskopicheskikh priborov [Gyroscopic Systems. Part III. Elements of Gyroscopic Instruments]. Moscow, Vyssh. shk. Publ., 1988. 432 p.

[3] Kharlamov S.A., ed. Podshipniki s gazovoy smazkoy [Gas-Lubricated Bearings]. Moscow, Mir Publ., 1966.

[4] Podchezertsev V.P. About calculation gas-dynamic bearings of precision gyroscopes. Aviakosmicheskoe priborostroenie [Aerospace Instrument-Making], 2014, no. 1, pp. 44-50 (in Russ.).

[5] Pretsch E., Biihlmann F., Affolter C. Structure Determination of Organic Compounds. Berlin, Heideberg, 2000.