DEVICE FOR AXIAL RETENTION OF BLADES INSTALLED ON ROTOR DISC OF GAS-TURBINE ENGINE Russian patent published in 2013 - IPC F01D5/30 

FIELD: engines and pumps.

SUBSTANCE: rotor disc includes multiple axial cavities, which are open outwards, a flange, multiple blades and a retaining ring. Cavities are located in circumferential direction of rotor disc. Flange is located on the level of radial support surface and extended radially outwards in order to form together with the above support surface an annular cavity that is open outwards. Each of the blades includes a root installed in the corresponding cavity of rotor disc. Each root of blade on the level of radial support surface includes at least one projection directed radially inwards to form together with the above support surface an annular channel that is open inwards. Retaining ring is installed on support surface of rotor disc and blade roots. It is arranged in disc cavity and retained on the outer side in channels of blade roots and is formed with multiple angular butted segments. At least one of the segments of the retaining ring has the weight that exceeds the weight of other segments. Also, the subject of the invention is gas-turbine engine containing one device for axial blade retention, the description of which is given above.

EFFECT: invention allows simplifying assembly and dismantling of the retaining device from rotor disc and imbalance adjustment.

5 cl, 7 dwg