US 11,933,312 B2
E-assist turbocharger with bleed fluid system connecting compressor section to web ring of turbine section for thrust load suppression
Milan Nejedly, Brno (CZ); Carlos Chavez Castellanos, Rolling Hill Estates, CA (US); and Kristian Dullack, Torrance, CA (US)
Assigned to GARRETT TRANSPORTATION I INC, Torrance, CA (US)
Filed by Garrett Transportation I Inc, Torrance, CA (US)
Filed on Dec. 14, 2020, as Appl. No. 17/247,485.
Prior Publication US 2022/0186740 A1, Jun. 16, 2022
Int. Cl. F04D 29/051 (2006.01); B23P 15/04 (2006.01); F01D 3/04 (2006.01); F02C 6/12 (2006.01); F04D 29/22 (2006.01)
CPC F04D 29/0513 (2013.01) [B23P 15/04 (2013.01); F01D 3/04 (2013.01); F02C 6/12 (2013.01); F04D 29/2266 (2013.01); F05D 2220/40 (2013.01); F05D 2230/60 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A turbocharger comprising:
a housing;
a rotating group supported for rotation within the housing, the rotating group including a compressor wheel disposed within a compressor section of the turbocharger, the rotating group including a turbine wheel disposed within a turbine section of the turbocharger, the turbine wheel including a bleed pressure surface, the turbine wheel including a turbine hub and a plurality of turbine blades that project from the turbine hub, the plurality of turbine blades having a blade tip disposed at a first radius, the turbine hub having an outer radial area disposed at the first radius, the turbine wheel and the housing cooperating to define a turbine forward space and a turbine back space, the plurality of turbine blades supported for rotation within the turbine forward space, the compressor wheel and the housing cooperating to define a compressor forward space and a compressor back space, the compressor wheel including a plurality of compressor blades supported for movement within the compressor forward space;
an electric motor that is operatively connected to the rotating group and that is configured for drivingly rotating the rotating group, the electric motor housed within a motor cavity in the housing;
a bleed passage that extends at least partly through the housing to fluidly connect the compressor section to the turbine section, the bleed passage including a bleed inlet that is fluidly connected to the compressor back space to receive a bleed flow of fluid therefrom, the bleed passage including a bleed outlet to the turbine back space, the bleed passage including a segment that extends through the housing and outside the motor cavity to fluidly connect the bleed inlet and the bleed outlet, the bleed passage configured to direct the bleed flow in a downstream direction from the bleed inlet, through the segment, and to the bleed outlet to supply a thrust counterbalance load to the bleed pressure surface; and
a bleed pressure member radially extending from the outer radial area of the turbine hub and terminating at a second radius that is greater than the first radius, the bleed pressure member including the bleed pressure surface between the first radius and the second radius.