公开(公告)号：US20140178207A1

公开(公告)日：2014-06-26

申请号：US14100784

申请日：2013-12-09

Applicant: ROLLS-ROYCE PLC

Inventor： Li HE ,  Qiang ZHANG ,  Anthony John RAWLINSON

IPC: F01D5/18 ,  F01D11/08

CPC classification number: F01D5/187 ,  F01D5/20 ,  F01D11/08 ,  F05D2250/13

Abstract: A rotor stage of a turbine has a rotational axis, a shroud and radially inward thereof a turbine blade defined partly by a pressure side wall, a suction side wall and a tip portion. The tip portion has a pressure side tip rib and a tip cavity floor defining a tip cavity. The pressure side tip rib has a width Wps, a height Hps above the tip cavity and defines a tip gap Gps with the shroud. The pressure side tip rib has a sloping side joining the tip cavity floor and having an angle αps to a radial line ZZ. The width Wps is in the range Gps to 5Gps, the height Hps is in the range 5Gps to 15Gps and the angle αps is in the range 20° to 70°.

Abstract translation: 涡轮机的转子级具有旋转轴线，护罩和径向向内的涡轮叶片，其部分地由压力侧壁，吸力侧壁和尖端部分限定。 尖端部分具有限定尖端腔的压力侧末端肋和尖端腔底。 压力侧末端肋具有宽度Wps，在尖端腔上方的高度Hps，并且与护罩限定尖端间隙Gps。 压力侧末端肋具有接合尖端空腔底板并且具有与径向线ZZ的角度αps的倾斜侧。 宽度Wps在Gps到5Gps的范围内，高度Hps在5Gps到15Gps的范围内，角度αps在20°到70°的范围内。