PROPULSION UNITS CASE (PUC) OF TURBOJET ENGINE, PUC ASSEMBLY OF TURBOJET ENGINE (VERSIONS) Russian patent published in 2017 - IPC F02C7/32 B01J3/00 

FIELD: machine engineering.

SUBSTANCE: propulsion units case (puc) of turbojet engine contains a body and a cover. The PUC body is located on the intermediate engine casing. The centrifugal fuel feed pump, the centrifugal impeller and the plunger pump are mounted on the PUC body. The end bellows-and-hinge assembly of the flexible shaft is connected from the bottom of the PUC body. An oil unit, a fuel pump regulator and a thrust augmentor pump are installed on the PUC cover. The edges of the openings in the PUC body and cover are made of thickened annular trim for flange, clamp connection or for an autonomous transition element connecting the unit with the PUC. A multistage reducers system of drive units is mounted inside the PUC. The torque input reducer in the PUC contains the main conical gear pair of the GCC connected through the spring to the CCP. The input shaft of the PUC is designed to combine the functions of the shaft driven wheel of the PUC main gear pair and the shaft of the main distributor wheel. The distributed system of gear reducers contains input units for both starting and operating torque to the units, respectively, through the main distributing wheel and the PUC GCC and CCP on the selector lever shaft, additionally, with the possibility of reverse gear to the reverse direction of the operating torque from the selector lever shaft to the gear reducers of the RAG drives. The gear ratio of the "annular" section of the reducers from the input shaft to the PUC of the starting torque up to the spring connecting the PUC GCC and CCP exceeds in (2.1÷4.2) times the reverse gear ratio of the same "annular" section of the reduces for transferring the operating torque from the RAG shaft in the opposite direction.

EFFECT: invention allows to increase the efficiency and increase engine service life.

23 cl, 2 dwg