Revolving part for a turbine test bench or for a turbomachine, turbine test bench comprising said part, and method for the use of these

The invention relates to a revolving part (60) intended to be rotated, comprising a hub (62) intended to be tightly adjusted on a rotary shaft (24), and a body (14) extending radially outwards from anaxial end of the hub. In order to increase the critical speed up to which the tightening can be retained, the hub (62) comprises three relatively thick annular regions (68, 66, 70) separated from oneanother by two relatively thin annular regions (64a, 64b), in such a way that when the revolving part is subject to a centrifugal force (F), the two relatively thin annular regions (64a, 64b) form privileged deformation zones acting as a double pivot. Such a part can advantageously be used as a piston for balancing in a turbine test bench or in a turbomachine. 本发明涉及种意在被旋转的旋转部件(60)，包括意在围绕旋转轴(24)被紧密调节的毂(62)，以及从毂的轴向端部径向向外延伸的本体(14)。为了使临界速度增加至能够保持紧固，毂(62)包括三个相对厚的环形区域(68，66，70)，该三个厚的环形区域通过两个相对薄的环形区域(64a，64b)彼此分开，以这种方式使得，当旋转部件受到离心力(F)时，两个相对薄的环形区域(64a，64b)形成用作双枢轴的特许变形区域。这种部件能够有利地用作在涡轮测试台或涡轮机中进行平衡的活塞。