# US 2021/0277903 A1 · Integrated gas compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277903 A1 - Document ID: US20210277903A1 - Status: Published application - Kind: A1 - Application number: 16/809,306 - Filed: 2020-03-04 - Published: 2021-09-09 - Earliest claimed: 2020-03-04 - Assignees: Solar Turbines Incorporated - Applicants: Solar Turbines Incorporated - Inventors: Jess Lee Freeman; William Watkins - Web page: https://patentgrep.com/patent/US20210277903A1 ## CPC - F04D 17/122: {the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors} - F04D 17/10: for compressing or evacuating - F04D 17/12: Multi-stage pumps - F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence) - F04D 25/0606: {the electric motor being specially adapted for integration in the pump} - F04D 29/053: Shafts - F04D 29/054: Arrangements for joining or assembling shafts - F04D 29/22: specially for centrifugal pumps - F04D 29/26: Rotors specially for elastic fluids - F04D 29/266: {mounting compressor rotors on shafts} - F04D 29/284: {for compressors} - F04D 29/286: {multi-stage rotors} - F04D 25/062: {Details of the bearings} - F04D 29/063: specially adapted for elastic fluid pumps - F05D 2240/61: Hollow - 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 ## Abstract An integrated gas compressor is disclosed herein. The integrated gas compressor includes an integrated motor with a stator, centrifugal impellers, and a shaft assembly with a rotor and conical transition. The integrated motor can produce an electromotive force that is imparted by the stator to rotate the rotor and components coupled to the rotor, such as the conical transition and the centrifugal impellers. At least one of the rotor and conical transition have a cavity. ## Claims ### Claim 1 An integrated gas compressor, the integrated gas compressor comprising: a housing; a plurality of centrifugal impellers positioned within the housing; an integrated motor positioned within the housing having a cylindrical stator, and a cylindrical rotor positioned inward and adjacent to the cylindrical stator; and a conical transition extending from the cylindrical rotor to the plurality of centrifugal impellers, at least one of the conical transition and the cylindrical rotor having a cavity. ### Claim 2 (depends on 1) The integrated gas compressor of claim 1, wherein the cavity is conically shaped. ### Claim 3 (depends on 1) The integrated gas compressor of claim 1, wherein the rotor includes a rotor cavity adjacent the conical transition and wherein the conical transition includes a conical transition cavity adjacent to the cylindrical rotor. ### Claim 4 (depends on 3) The integrated gas compressor of claim 3, wherein the rotor cavity is radially larger adjacent to the conical transition than away from the conical transition. ### Claim 5 (depends on 4) The integrated gas compressor of claim 4, wherein the rotor cavity does not extend to within the cylindrical stator. ### Claim 6 (depends on 3) The integrated gas compressor of claim 3, wherein the conical transition cavity is radially larger adjacent to the cylindrical rotor than away from the cylindrical rotor. ### Claim 7 (depends on 3) The integrated gas compressor of claim 3, wherein the conical transition cavity is radially larger than the rotor cavity at an interface between the cylindrical rotor and the conical transition. ### Claim 8 A conical transition for an integrated gas compressor the conical transition comprising: a conical transition front end; a conical transition back end located opposite of the conical transition front end, the conical transition back end radially smaller than the conical transition front end; an annular middle step located between the conical transition front end and the conical transition back end; and a conical transition cavity extending from the conical transition front end to the conical transition back end, the conical transition cavity having a toriconical shape. ### Claim 9 (depends on 8) The integrated gas compressor of claim 8, further including a housing, and an integrated motor positioned within the housing, the integrated motor including a stator and a rotor inward of the stator, the rotor having back rotor dowel slots, and wherein the conical transition front end includes a plurality of front transition dowel slots positioned and shaped to align with the back rotor dowel slots. ### Claim 10 (depends on 9) The integrated gas compressor of claim 9, further including a plurality of centrifugal impellers positioned within the housing, the plurality of centrifugal impellers having front impeller dowel slots, and wherein the conical transition back end includes a plurality of back transition dowel slots positioned and shaped to align with the front impeller dowel slots. ### Claim 11 (depends on 10) The conical transition of claim 10, wherein the annular middle step includes middle transition dowel slots for coupling with the plurality of centrifugal impellers. ### Claim 12 A rotor for an integrated gas compressor, the rotor comprising: a rotor front end; a rotor back end located opposite the rotor front end; and a rotor cavity located adjacent to the rotor back end and having a conical shape, the rotor cavity radially larger proximate the rotor back end than away from the rotor back end. ### Claim 13 (depends on 12) The integrated gas compressor of claim 12, further including a housing, a plurality of centrifugal impellers positioned within the housing, and a conical transition coupled to the plurality of centrifugal impellers, the conical transition having front transition dowel slots, and wherein the rotor back end includes a plurality of back rotor dowel slots positioned and shaped to align with the front transition dowel slots.