REVOLUTION PIECE FOR TURBINE TEST BENCH OR FOR TURBOMACHINE, TURBINE TESTING BENCH COMPRISING THE TURBINE, AND PROCESS USING THE SAME

摘要

There is provided a rotating member (60) for rotation, comprising a hub (62) for tight fitting on a rotating shaft (24), and a body (14) extending radially to the outside from an axial end of the hub. In order to increase the critical speed up to which clamping can be maintained, the hub (62) has three relatively thick annular regions (68, 66, 70) separated from each other by two relatively thin annular regions (64a, 64b). ), so that when the piece of revolution is subjected to a centrifugal force (F), the two relatively thin annular regions (64a, 64b) form zones of preferred deformation behaving as a double pivot. Such a part can advantageously be used as a balancing piston in a turbine test bench or in a turbomachine.