device for cooling a turbomachine rotor

The invention relates to a device for cooling a turbomachine rotor. A device cools a disk of a turbine extending along an axis. The disk includes on its circumference at least one recess surrounded bydisk teeth each having an upstream face. The recess includes a bottom in fluid communication with an upstream cavity by way of at least one lunula. The lunula includes lateral surfaces that are inclined with respect to the radial plane which constitutes the plane of symmetry of the recess into which the lunula opens. 本发明涉及种用于冷却涡轮机转子的装置。在对涡轮的盘部进行冷却的装置中，盘部沿轴线延伸，盘部的圆周上包括至少个槽，槽由多个盘部齿围绕，盘部齿中的每个具有上游面，槽包括底部，底部通过至少个半月部与上游腔流体连通，半月部包括多个侧表面部分，其特征在于，侧表面部分相对于径向平面倾斜角度，该径向平面构成槽的对称平面，半月部通入槽中。