# US 2014/0154054 A1 · Oil baffle for gas turbine fan drive gear system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154054 A1 - Document ID: US20140154054A1 - Status: Published application - Kind: A1 - Application number: 14/173,874 - Filed: 2014-02-06 - Published: 2014-06-05 - Earliest claimed: 2006-07-05 - Assignees: United Technologies Corporation - Applicants: United Technologies Corporation - Inventors: William G. Sheridan; Michael E. McCune - Web page: https://patentgrep.com/patent/US20140154054A1 ## CPC - F01D 25/18: Lubricating arrangements (of machines or engines in general F01M) - F02C 7/36: Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user ({F02C3/107 - F02C3/13 and} F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H) - F16H 57/0423: {Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes} - F16H 57/0486: {with fixed gear ratio (axle or inter-axle differentials F16H57/0483)} - F05D 2230/60: Assembly methods - F05D 2260/40311: of the epicyclical, planetary or differential type - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - Y10T 29/4932: Turbomachine making - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F16H: GEARING - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A turbine engine comprises compressor and turbine sections. An epicyclic gear train includes a carrier, a sun gear and intermediate gears arranged about and intermeshing with the sun gear. The intermediate gears are supported by the carrier. A baffle includes a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant on at least one of the sun gear and intermediate gears. A method of designing a turbine engine is also disclosed. ## Claims ### Claim 1 A turbine engine comprising: compressor and turbine sections; and an epicyclic gear train including: a carrier; a sun gear and intermediate gears arranged about and intermeshing with the sun gear, the intermediate gears supported by the carrier; and a baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant on the at least one of the sun gear and intermediate gears. ### Claim 2 (depends on 1) The turbine engine according to claim 1, comprising a ring gear intermeshing with the intermediate gears and an output shaft interconnected to the ring gear, and an input shaft interconnected to the sun gear. ### Claim 3 (depends on 2) The turbine engine according to claim 2, wherein the carrier is fixed relative to a housing, the output shaft drives a fan, and the input shaft supports a compressor hub having compressor blades. ### Claim 4 (depends on 2) The turbine engine according to claim 2, wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving the fan through the input shaft, and two other turbine rotors driving compressor rotors. ### Claim 5 (depends on 2) The turbine engine according to claim 2, wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub, and a fan at a common speed, and the input shaft is driven by a turbine rotor. ### Claim 6 (depends on 5) The turbine engine according to claim 5, wherein there are two turbine rotors, with the first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the fan through the input shaft. ### Claim 7 (depends on 2) The turbine engine according to claim 2, wherein the carrier is fixed to a housing, and the output shaft drives a fan, with the input shaft rotating with a compressor hub. ### Claim 8 (depends on 1) The turbine engine according to claim 1, wherein the carrier includes spaced apart walls with circumferentially spaced mounts interconnecting the walls, the mounts providing circumferentially spaced apart apertures between the mounts at an outer circumference of the carrier, the intermediate gears extending through the apertures to intermesh with a ring gear. ### Claim 9 (depends on 8) The turbine engine according to claim 8, comprising a housing supporting a torque frame that is secured to the mounts. ### Claim 10 (depends on 8) The turbine engine according to claim 8, wherein the lubrication passage includes a primary passage extending laterally between the walls and first and second passages in communication with the primary passage and respectively terminating near the sun gear and intermediate gears. ### Claim 11 (depends on 10) The turbine engine according to claim 10, comprising a tube extending through a hole in one of the walls, the tube in communication with the primary passage. ### Claim 12 (depends on 1) The turbine engine according to claim 1, wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors. ### Claim 13 (depends on 1) The turbine engine according to claim 1, wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub and a fan at a common speed, and the input shaft is driven by a turbine rotor. ### Claim 14 (depends on 2) The turbine engine according to claim 2, wherein the carrier is fixed to a housing, and the output shaft drives a fan, with the input shaft rotating with a compressor hub. ### Claim 15 (depends on 14) The turbine engine according to claim 14, wherein there are two turbine rotors in the turbine section with a first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the input shaft. ### Claim 16 A turbine engine comprising: compressor and turbine sections; and an epicyclic gear train including: a carrier; a sun gear and intermediate gears arranged about and intermeshing with the sun gear, the intermediate gears supported by the carrier; a baffle, the baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant on the at least one of the sun gear and intermediate gears; and a spray bar external to the carrier and in communication with the lubrication passage, the spray bar terminating near the sun gear for directing lubricant on the sun gear. ### Claim 17 (depends on 16) The turbine engine according to claim 16, comprising a ring gear intermeshing with the intermediate gears and an output shaft interconnected to the ring gear, and an input shaft interconnected to the sun gear. ### Claim 18 (depends on 17) The turbine engine according to claim 17, wherein the carrier is fixed relative to a housing, the output shaft drives a fan, and the input shaft supports a compressor hub having compressor blades. ### Claim 19 (depends on 17) The turbine engine according to claim 17, wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors. ### Claim 20 (depends on 17) The turbine engine according to claim 17, wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub, and a fan at a common speed, and the input shaft is driven by a turbine rotor. ### Claim 21 (depends on 20) The turbine engine according to claim 20, wherein there are two turbine rotors, with the first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the fan through the input shaft. ### Claim 22 (depends on 16) The turbine engine according to claim 16, wherein the carrier includes spaced apart walls with circumferentially spaced mounts interconnecting the walls, the mounts providing circumferentially spaced apart apertures between the mounts at an outer circumference of the carrier, the intermediate gears extending through the apertures to intermesh with a ring gear. ### Claim 23 (depends on 22) The turbine engine according to claim 22, wherein the lubrication passage includes a primary passage extending laterally between the walls and first and second passages in communication with the primary passage and respectively terminating near the sun gear and intermediate gears. ### Claim 24 (depends on 19) The turbine engine according to claim 19, comprising a tube extending through a hole in one of the walls, the tube in communication with the primary passage. ### Claim 25 (depends on 16) The turbine engine according to claim 16, wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors. ### Claim 26 (depends on 16) The turbine engine according to claim 16, wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub, and a fan at a common speed, and the input shaft is driven by a turbine rotor. ### Claim 27 (depends on 26) The turbine engine according to claim 26, wherein there are two turbine rotors, with the first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the fan through the input shaft. ### Claim 28 (depends on 16) The turbine engine according to claim 16, wherein the carrier is fixed to a housing, and the output shaft drives a fan, with the input shaft rotating with a compressor hub. ### Claim 29 (depends on 28) The turbine engine according to claim 28, wherein there are two turbine rotors in the turbine section with a first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the input shaft. ### Claim 30 A method of designing a turbine engine comprising: providing an epicyclic gear train including: a carrier; a sun gear and intermediate gears arranged about and intermeshing with the sun gear, the intermediate gears supported by the carrier; and a baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant on the at least one of the sun gear and intermediate gears; and providing a compressor section and a turbine sections, the turbine section to drive the compressor section and the epicyclic gear train, wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors.