US 9,810,238 B2
Turbocharger with turbine shroud
Richard E. Annati, Lafayette, IN (US); Jeffrey W. McCormack, Fishers, IN (US); and Matthew J. Frick, Novi, MI (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Mar. 9, 2015, as Appl. No. 14/642,634.
Prior Publication US 2016/0265379 A1, Sep. 15, 2016
Int. Cl. F04D 29/42 (2006.01); F01D 9/04 (2006.01)
CPC F04D 29/4226 (2013.01) [F01D 9/045 (2013.01); F05D 2220/40 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A turbine assembly comprising:
a turbine housing;
a turbine wheel disposed within the turbine housing, the turbine wheel including a first end opposite a second end and a rotational axis extending between the first end and the second end, the turbine wheel including a plurality of blades;
a turbine shroud disposed between the turbine housing and the turbine wheel along a radial direction, the turbine shroud being separate from the turbine housing, the turbine shroud including:
an annular portion extending generally in an axial direction with respect to the rotational axis, at least a portion of the plurality of blades being disposed in at least a portion of the annular portion, and
a plate portion intersecting the annular portion to form a convex curved surface;
wherein each of the plurality of blades of the turbine wheel includes a leading edge and a tip portion, each leading edge being angled with respect to the rotational axis, each tip portion forming a concave portion that curves around the curved surface of the turbine shroud; and
a heat shield disposed adjacent the second end of the turbine wheel, the turbine shroud being attached to the heat shield, wherein the heat shield further includes a plurality of bores extending along the radial direction for receiving a plurality of pins configured to radially attach the heat shield to a bearing housing, wherein the plurality of pins are press fit into respective bores in the heat shield and slidably received in respective bores in the bearing housing.