Вестник МГТУ. 2016, №4.

Вестник МГТУ. 2016. Т. 19, № 4. С. 813–821. DOI: 10.21443/1560-9278-2016-4-813-821 821 E. V. Shehovtseva Improvement of bearing support lubrication Gas turbine engine bearing supports is an important part in providing product efficiency of general and special- purpose engineering industry. Attempts are being made to increase efficiency of bearing support. Such attempts are caused by the modern tendency of the development of engineering striving for compact machines and units possessing increased reliability and durability. Researches on finding discrepancies in operation of support for this purpose have been executed. The reasons of occurrence the fatigue crumbling on external bearing races at different stages development of working surface damage have been investigated. The basic constructions of support of shaft for the aviation gas turbine engine and methods of their lubrication have been considered. Shortcomings of existing methods of lubrication of bearing supports have been marked. The upgraded construction of the module of gas turbine bearing shaft, which allows to improve conditions of lubrication and bearing cooling as a result of a uniform oil feed to the contact zones of outside bearing race and rolling elements and forced oil removal from contact zones of inside bearing race and rolling elements has been suggested. The task of improving conditions of lubrication supply to an internal holder of the bearing has been solved. The developed design allows applying unconventional methods of lubrication and cooling of a bearing support. Thus it is recommended to use process of regulation of a microrough on working surfaces bearing support during grinding-in. It will allow to improve a stage grinding-in and to increase reliability and durability of bearing support. Key words: shaft bearing, bearing, oil-air lubrication supply and oil-air lubrication return, external and internal bearing races, crumbling or fatigue spalling (pitting), bearing treadmill.