# US 2013/0156552 A1 · Cost effective high thrust capacity turbocharger assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0156552 A1 - Document ID: US20130156552A1 - Status: Published application - Kind: A1 - Application number: 13/325,831 - Filed: 2011-12-14 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Precision Turbo & Engine Rebuilders, Inc. - Inventors: Daniel J. Barlog - Web page: https://patentgrep.com/patent/US20130156552A1 ## CPC - F16C 33/32: Balls - F04D 25/024: {the driving means being assisted by a power recovery turbine} - F04D 29/051: Axial thrust balancing - F04D 29/059: Roller bearings - F16C 19/543: {in O-arrangement} - F16C 21/00: Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement (F16C17/24, F16C19/52 take precedence) - F16C 33/56: Selection of substances (F16C33/48, F16C33/49 take precedence) - F16C 33/62: Selection of substances - F05D 2220/40: in turbochargers - F16C 2360/24: Turbochargers - Y10T 29/49696: Mounting - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An assembly for a turbocharger and methods for creating the same are disclosed. Such assembly for a turbocharger includes a bearing housing having first and second bore ends, a housing cavity, and a bearing assembly disposed within the housing cavity. The bearing assembly includes an annular rotating journal positioned at the first bore end and first and second angular contact bearings positioned at the second bore end, where the first and second angular contact bearings resist axial loads in opposite directions. The bearing housing and bearing assembly are configured to receive a shaft and together dampen axial and radial loads in all directions from the shaft. ## Claims ### Claim 1 An assembly for a turbocharger, the assembly comprising: a bearing housing comprising a substantially cylindrical bore having a longitudinal axis, a first bore end, a second bore end, and a housing cavity extending through the bearing housing between the first bore end and the second bore end; a bearing assembly disposed within the housing cavity comprising: an annular rotating journal bearing positioned concentrically within the housing cavity adjacent the first bore end; a first angular contact bearing positioned concentrically within the housing cavity adjacent the second bore end, the first angular contact bearing comprising: a first bearing outer race and a first bearing inner race, the first bearing outer race and the first bearing inner race configured to accommodate a plurality of first bearing elements therebetween and to resist axial loads in a first direction along the longitudinal axis of the bearing housing; a second angular contact bearing positioned concentrically within the housing cavity adjacent the first angular contact bearing, the second angular contact bearing comprising: a second bearing outer race and a second bearing inner race, the second bearing outer race and the second bearing inner race configured to accommodate a plurality of second bearing elements therebetween and to resist axial loads in a second direction along the longitudinal axis of the bearing housing, wherein the second direction is opposite the first direction; wherein the bearing housing and bearing assembly are configured to receive a shaft and together dampen axial and radial loads in all directions from said shaft. ### Claim 2 (depends on 1) The assembly of claim 1, further comprising a rotating shaft extending longitudinally through the bearing housing and comprising a turbine at the first bore end and a compressor at the second bore end. ### Claim 3 (depends on 1) The assembly of claim 1, further comprising a bearing retainer plate interposed between the first angular contact bearing and the compressor having an axially-facing surface in contact with an adjacent axial surface of the first outer race for transmitting an axial thrust load to the bearing housing. ### Claim 4 (depends on 1) The assembly of claim 1, further comprising a seal collar interposed between the bearing retainer plate and the compressor having an axially-facing surface in contact with an adjacent axial surface of the first inner race for transmitting an axial thrust load to the bearing housing. ### Claim 5 (depends on 1) The assembly of claim 1, further comprising a bearing sleeve interposed between the bearing housing and the outer bearing races of the first and second angular contact bearings. ### Claim 6 (depends on 1) The assembly of claim 1, wherein the plurality of first bearing elements comprise metallic or plastic balls. ### Claim 7 (depends on 6) The assembly of claim 6, wherein the plurality of second bearing elements comprise metallic or plastic balls. ### Claim 8 (depends on 1) The assembly of claim 1, wherein the first bearing outer race and the first bearing inner race comprise metal or plastic. ### Claim 9 (depends on 8) The assembly of claim 8, wherein the second bearing outer race and the second bearing inner race comprise metal or plastic. ### Claim 10 A method of creating an assembly of a turbocharger for resisting loads caused by a shaft of the turbocharger, the method comprising: providing a bearing housing comprising a substantially cylindrical bore having a longitudinal axis, a first bore end, a second bore end, and a housing cavity extending through the bearing housing between the two bore ends; placing an annular journal bearing within the housing cavity adjacent to the first bore end; placing a first angular contact bearing within the housing cavity adjacent to the second bore end, wherein the first annular contact bearing comprises a plurality of first bearing elements; placing a second angular contact bearing within the housing cavity adjacent to the first angular contact bearing such the first and second angular contact bearings are opposing to each other, wherein the second angular contact bearing comprises a plurality of second bearing elements; and placing a bearing retainer plate and a seal collar adjacent the second bore end of the bearing housing such that the first and second angular contact bearings are at least partially retained within the housing cavity of the bearing housing by the bearing housing, the bearing retainer plate, and the seal collar. ### Claim 11 (depends on 10) The method of claim 10, wherein the plurality of first bearing elements comprises metallic or plastic bearing balls. ### Claim 12 (depends on 11) The method of claim 11, wherein the plurality of second bearing elements comprises metallic or plastic bearing balls. ### Claim 13 (depends on 10) The method of claim 10, wherein the first angular contact bearing comprises metal or plastic. ### Claim 14 (depends on 13) The method of claim 13, wherein the second angular contact bearing comprises metal or plastic. ### Claim 15 A method of improving an existing journal bearing turbocharger, the method comprising: providing a journal bearing turbocharger comprising: a bearing housing comprising a substantially cylindrical bore having a longitudinal axis, a first bore end, a second bore end, and a housing cavity extending through the bearing housing between the two bore ends; a rotating shaft extending longitudinally through the bearing housing and comprising a turbine at the first bore end and a compressor at the second bore end; a first annular journal bearing positioned within the housing cavity adjacent to the first bore end; a thrust bearing positioned within the housing cavity adjacent to the second bore end; a second annular journal bearing positioned within the housing cavity between the first annular journal bearing and the thrust bearing; a thrust washer positioned within the housing cavity in contact with the thrust bearing and between the thrust bearing and the second annular journal bearing; a seal collar positioned adjacent the second bore end of the bearing housing such that the first and second angular contact bearings are retained within the housing cavity of the bearing housing by the bearing housing, the bearing retainer plate, and the seal collar; removing the thrust bearing, the second annular journal bearing, and the thrust washer from the journal bearing turbocharger; modifying the bearing housing, the rotating shaft, and the seal collar such that a first angular contact bearing, a second angular contact bearing, a bearing sleeve, and a bearing retainer plate may be positioned within the turbocharger where the thrust bearing, second annular journal bearing, and thrust washer were previously positioned in the turbocharger, wherein each of the first and second angular contact bearings comprise metallic or plastic ball bearings; placing the first angular contact bearing within the bearing sleeve; placing the second angular contact bearing within the bearing sleeve adjacent to the first angular contact bearing such the first and second angular contact bearings oppose each other; placing the bearing sleeve within the bearing housing adjacent to the second bore end; placing the bearing retainer plate adjacent the second bore end of the bearing housing such that the first and second angular contact bearings are at least partially retained within the housing cavity of the bearing housing; and placing the seal collar adjacent the bearing retainer plate adjacent the second bore end of the bearing housing such that the first and second angular contact bearings are at least partially retained within the housing cavity of the bearing housing by the bearing housing, the bearing retainer plate, and the seal collar.