# US 10,502,660 B2 · Turbocharger compressor wheel assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,660 B2 - Document ID: US10502660B2 - Status: Granted - Kind: B2 - Application number: 15/081,736 - Filed: 2016-03-25 - Published: 2017-09-28 - Granted: 2019-12-10 - Earliest claimed: 2016-03-25 - Assignees: Garrett Transportation I Inc. - Applicants: Garrett Transportation I Inc. - Inventors: Dominique Armand; Philippe Mathieu; Joel Castan; Gerard Dieudonne - Web page: https://patentgrep.com/patent/US10502660B2 ## CPC - G01M 15/14: Testing gas-turbine engines or jet-propulsion engines - F01D 5/025: {Fixing blade carrying members on shafts (attachment of a member on a shaft in general F16D1/06; for non-positive displacement pumps F04D29/00)} - F04D 17/10: for compressing or evacuating - F04D 29/054: Arrangements for joining or assembling shafts - F04D 29/266: {mounting compressor rotors on shafts} - F04D 29/284: {for compressors} - F16B 19/05: Bolts fastening by swaged-on collars (F16B19/08 takes precedence) - F16D 1/072: involving plastic deformation (plastic welding F16D1/068) - F16D 1/076: by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges - F01D 5/027: {Arrangements for balancing (for balancing rotating bodies in general F16F15/32; for compensating imbalance G01M1/36)} - F05D 2220/40: in turbochargers - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A method of loading a rotating assembly of a turbocharger can include positioning a swage collar on an end portion of a turbocharger shaft that extends through a through bore of a compressor wheel; applying a pulling force to the end portion of the turbocharger shaft to achieve a desired amount of loading; deforming the swage collar to form a swaged collar fixed to the end portion of the turbocharger shaft; and releasing the pulling force wherein the swaged collar maintains the desired amount of loading. ## Claims ### Claim 1 A method of loading a rotating assembly of a turbocharger, the method comprising: positioning a swage collar on an end portion of a turbocharger shaft that extends through an axial through bore of a compressor wheel, wherein the compressor wheel comprises a nose end, a base end, a plurality of blades, and a plurality of seating surfaces at corresponding axial positions located between an axial position of the nose end and an axial position of the base end and at corresponding radial positions greater than a maximum radius of the swage collar; applying a pushing force to one or more of the seating surfaces of the compressor wheel with one or more force applicators while applying a pulling force to the end portion of the turbocharger shaft to compress the compressor wheel between the one or more seating surfaces of the compressor wheel and the base end of the compressor wheel; controlling loading via the pushing force, the pulling force or the pushing force and the pulling force; deforming the swage collar to form a swaged collar fixed to the end portion of the turbocharger shaft; and releasing the pulling and the pushing forces wherein the swaged collar maintains a desired amount of loading, wherein the desired amount of loading couples the compressor wheel to the turbocharger shaft for rotation of the compressor wheel responsive to rotation of the turbocharger shaft. ### Claim 2 (depends on 1) The method of claim 1 wherein the desired amount of loading exceeds a force of approximately 1000 N. ### Claim 3 (depends on 1) The method of claim 1 wherein the deforming comprises forcibly contacting a swaging tool and the swage collar to deform the swage collar. ### Claim 4 (depends on 1) The method of claim 1 wherein applying a pulling force to the end portion of the turbocharger shaft comprises applying a pulling force via a threaded coupling of a swaging tool to the end portion of the turbocharger shaft. ### Claim 5 (depends on 1) The method of claim 1 further comprising separating a portion of the turbocharger shaft. ### Claim 6 (depends on 1) The method of claim 1 comprising measuring applied force. ### Claim 7 (depends on 1) The method of claim 1 comprising balancing the rotating assembly by removing material from the swaged collar. ### Claim 8 (depends on 1) The method of claim 1 comprising balancing the rotating assembly by removing material from the compressor wheel. ### Claim 9 (depends on 1) The method of claim 1 comprising balancing the rotating assembly by removing material from the compressor wheel without removing material from the swaged collar. ### Claim 10 (depends on 1) The method of claim 1 wherein the turbocharger shaft comprises a shoulder that experiences force by applying the pulling force. ### Claim 11 (depends on 1) The method of claim 1 comprising a thrust collar that abuts the compressor wheel at the base end of the compressor wheel, wherein the turbocharger shaft comprises a surface that abuts the thrust collar, and wherein the desired amount of loading is maintained axially between the swaged collar and the surface of the turbocharger shaft. ### Claim 12 (depends on 1) The method of claim 1 wherein each of the plurality of seating surfaces is disposed between two of the blades of the compressor wheel. ### Claim 13 (depends on 1) The method of claim 1 comprising, via one or more of the seating surfaces, compressing the compressor wheel during a period of load relaxation. ### Claim 14 (depends on 1) The method of claim 1 wherein the swage collar comprises grooves and wherein the end portion of the turbocharger shaft comprises features and wherein the deforming deforms the swage collar to form contacts between the grooves and the features. ### Claim 15 (depends on 14) The method of claim 14 wherein the deforming forms contacts between the grooves and the features over at least 40 percent of grooves and features surfaces. ### Claim 16 (depends on 1) The method of claim 1 wherein the swage collar comprises a multi-piece collar. ### Claim 17 (depends on 16) The method of claim 16 wherein the multi-piece collar comprises at least one mechanical fuse that comprises an associated pre-estimated actuation force. ### Claim 18 (depends on 16) The method of claim 16 wherein the multi-piece collar comprises a plastic fuse component. ### Claim 19 (depends on 16) The method of claim 16 wherein the multi-piece collar comprises a deformable fuse feature.