公开(公告)号：EP4112884A1

公开(公告)日：2023-01-04

申请号：EP21183176.3

申请日：2021-07-01

申请人： Doosan Enerbility Co., Ltd.

发明人： TSYPKAYKIN, Igor ,  MARTIN, Stefan Emanuel ,  BEAUMONT, Wade ,  KRUECKELS, Joerg ,  HOFFMANN, Willy H.

IPC分类号： F01D5/22 ,  F01D5/26

摘要： A blade for turbo machine, in particular for a turbine, includes an airfoil body extending in a radial direction and comprising a suction side surface and a pressure side surface opposite to the suction side surface with regard to a circumferential direction that extends transverse to the radial direction, and a snubber structure. The snubber structure includes a first snubber element protruding, along the circumferential direction, from the suction side surface of the airfoil body, and a second snubber element protruding, along the circumferential direction, from the pressure side surface of the airfoil body wherein the first snubber element is connected to the suction side surface of the airfoil body by a concave curved first transition portion having a first radius, and wherein the second snubber element is connected to the pressure side surface of the airfoil body by a concave curved second transition portion having a second radius. The first radius is smaller than the second radius to reduce aerodynamic losses.