公开(公告)号：US20160265379A1

公开(公告)日：2016-09-15

申请号：US14642634

申请日：2015-03-09

Applicant: CATERPILLAR INC.

Inventor： Richard E. ANNATI ,  Jeffrey W. McCORMACK ,  Matthew J. FRICK

IPC: F01D11/08 ,  F01D5/14 ,  F01D9/04 ,  F01D25/14 ,  F04D29/28 ,  F04D29/42 ,  F01D25/16 ,  F01D5/02 ,  F01D25/24

CPC classification number: F04D29/4226 ,  F01D9/045 ,  F05D2220/40

Abstract: A turbine assembly includes a turbine housing and a turbine wheel disposed within the turbine housing. The turbine wheel includes a rotational axis and a plurality of blades. The turbine assembly includes a turbine shroud disposed between the turbine housing and the turbine wheel along a radial direction. The turbine shroud is separate from the turbine housing. The turbine shroud includes an annular portion extending generally in an axial direction with respect to the rotational axis and a plate portion intersecting the annular portion to form a convex curved surface. At least a portion of the blades is disposed in at least a portion of the annular portion. Each blade includes a leading edge and a tip portion. Each leading edge is angled with respect to the rotational axis, and each tip portion forms a concave portion that curves around the curved surface of the turbine shroud.

Abstract translation: 涡轮组件包括涡轮机壳体和设置在涡轮壳体内的涡轮机叶轮。 涡轮机叶轮包括旋转轴线和多个叶片。 涡轮组件包括沿着径向方向布置在涡轮壳体和涡轮机叶轮之间的涡轮机罩。 涡轮机罩与涡轮机壳体分离。 涡轮机罩包括大致沿轴向相对于旋转轴线延伸的环形部分和与环形部分相交的板部分以形成凸曲面。 叶片的至少一部分设置在环形部分的至少一部分中。 每个叶片包括前缘和尖端部分。 每个前缘相对于旋转轴线成角度，并且每个尖端部分形成围绕涡轮机护罩的弯曲表面弯曲的凹部。