A bearing cooling device for a turbojet engine

Abstract

The utility model discloses a turbojet engine bearing cooling device belongs to turbojet engine technical field, including the shaft pipe for installing turbojet engine turbine rear bearing, the inside wall of shaft pipe is equipped with cooling groove in the corresponding installation position of rear bearing, and the inside of shaft pipe is equipped with the inner cover of cooling groove, and the both ends of inner cover are sealedly connected with the inside wall of shaft pipe, and the cooling groove forms the sealed chamber, be equipped with the oil inlet pipe and the oil outlet pipe on the shaft pipe, and the oil inlet pipe is communicated with one end of cooling groove, and the oil outlet pipe is communicated with the other end of cooling groove, and the one end of oil inlet pipe and oil outlet pipe away from cooling groove all are communicated with the fuel system of engine to obtain fuel and send back to the fuel system after cooling groove. The utility model discloses through the flow of fuel in the cooling groove and the direct injection of inclined hole, can reduce turbine rear bearing temperature to 300-500 degrees Celsius, prolongs the service life significantly, utilizes the fuel of engine itself as cooling medium, does not need extra system, and the simple structure, low in cost, is easy to integrate.

Images