GAS TURBINE ENGINE SUPPORT ASSEMBLY Russian patent published in 2019 - IPC F16C27/00 F02C7/06 F16C33/66 

FIELD: machine building.

SUBSTANCE: invention relates to aircraft engine building and power machine building, mainly to systems of lubrication and cooling of bearing supports of gas turbine engines, and can be used to increase lubrication and cooling efficiency of bearings, for example, high-temperature aircraft gas turbine engines, where application of cooling with oil-and-air mixture is not possible, due to specific operating conditions, such as operation in aggressive gas medium or application in special equipment, where oil ingress is prevented from penetrating into cavity. Support assembly of gas turbine engine includes housing, ball bearing with outer and inner rings, installed on hollow shaft of rotor, in walls of which there are holes, wherein end surfaces of inner ring are conjugated with bushes also installed on hollow shaft of rotor. From both ends of ball bearing, by means of cover and walls of housing, there are inlet and outlet cavities containing graphite lubricant, in contrast to known in cover wall there are special holes for graphite filling of air-graphite mixture and blowing of cavities, walls of ball bearing housing have grooves for passage of cooling air. In the inlet cavity at the input of the bearing there is a diaphragm containing an element of organization, throttling and cooling of the dust graphite cloud, and in the output cavity at the output of the bearing there is an element for creation and circulation of the dust graphite cloud and air cooling at the input of the bearing. At that, in the input cavity between the bushing and the housing and in the output cavity between the bushing and the cover there installed are combined seals for gaps of excess air with gaps. Element for creation and circulation of dust graphite cloud and air cooling at bearing inlet is made in the form of impeller with profiled blades. Element of organization, cooling and throttling of dust graphite cloud is made in form of holes. Additional technical solution is throttling flow of graphite dust mixture at inlet of bearing.

EFFECT: reliable operation of a support of a gas-turbine engine and, consequently, of an entire engine operating in specific conditions for a long period of time, by providing stable conditions of lubrication and cooling of the bearing, due to creation and circulation of a dusty graphite cloud along an isolated trajectory around the bearing.

3 cl, 6 dwg