# US 11,753,998 B2 · Compact accessory systems for a gas turbine engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,753,998 B2 - Document ID: US11753998B2 - Status: Granted - Kind: B2 - Application number: 16/914,664 - Filed: 2020-06-29 - Published: 2021-03-25 - Granted: 2023-09-12 - Earliest claimed: 2017-10-18 - Assignees: Honeywell International Inc. - Applicants: Honeywell International Inc. - Inventors: Shawn Alstad; Tomasz Dobosz; Rocio Chavez Felix - Web page: https://patentgrep.com/patent/US11753998B2 ## CPC - F02C 7/32: Arrangement, mounting, or driving, of auxiliaries - F01D 25/162: {Bearing supports} - F16H 1/222: {with non-parallel axes} - F16H 55/20: for bevel gears - F05D 2230/644: for adjusting the position or the alignment, e.g. wedges or eccenters - F05D 2240/50: Bearings - F05D 2250/312: the axes being parallel to each other - F05D 2250/313: the axes being perpendicular to each other - F05D 2250/314: the axes being inclined in relation to each other - F05D 2260/4031: as in toothed gearing - F05D 2260/532: of the bevelled or angled type - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - 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) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - 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 ## Abstract An accessory system for a gas turbine engine having a drive shaft with an axis of rotation is provided. Also provided is a bearing housing assembly for coupling the drive shaft of an accessory having a first gear to a gear associated with the accessory system. The bearing housing assembly includes a mount including an interface to be coupled to the accessory and defining a central bore, and a lock cylinder configured to receive the drive shaft. The lock cylinder is movable relative to the central bore and the drive shaft to adjust a contact pattern between the first gear of the drive shaft and the gear of the accessory system. ## Claims ### Claim 1 A bearing housing assembly for coupling a drive shaft of an accessory having a first gear to a gear associated with an accessory system of a gas turbine engine, comprising: a mount including an interface to be coupled to the accessory and defining a central bore; and a lock cylinder configured to receive the drive shaft, the lock cylinder movable relative to the central bore and the drive shaft to adjust a contact pattern between the first gear of the drive shaft and the gear of the accessory system. ### Claim 2 (depends on 1) The bearing housing assembly of claim 1, wherein the mount includes a plurality of mounting bores spaced apart about a perimeter of the interface to couple the mount to the accessory. ### Claim 3 (depends on 1) The bearing housing assembly of claim 1, wherein the central bore defines a plurality of threads, and the lock cylinder defines a plurality of threads to couple the lock cylinder to the mount. ### Claim 4 (depends on 3) The bearing housing assembly of claim 3, wherein the plurality of threads of the lock cylinder are defined on an exterior surface of the lock cylinder, with the lock cylinder including an interior surface opposite the exterior surface to receive the drive shaft. ### Claim 5 (depends on 4) The bearing housing assembly of claim 4, wherein the exterior surface further defines a plurality of alternating flats at an end of the lock cylinder. ### Claim 6 (depends on 4) The bearing housing assembly of claim 4, wherein the interior surface defines a retaining groove, and the bearing housing assembly further comprises a retaining ring coupled to the retaining groove. ### Claim 7 (depends on 3) The bearing housing assembly of claim 3, further comprising a lock nut having a plurality of threads to couple the lock nut to the lock cylinder. ### Claim 8 (depends on 1) The bearing housing assembly of claim 1, further comprising at least one bearing received within the lock cylinder to enable rotation of the drive shaft. ### Claim 9 (depends on 1) An accessory system for a gas turbine engine comprising at least one of the bearing housing assembly of claim 1. ### Claim 10 (depends on 1) The bearing housing assembly of claim 1, wherein the gear of the accessory system is a towershaft bevel gear associated with a towershaft and the first gear of the drive shaft is a first bevel gear, and the lock cylinder is movable relative to the central bore and the drive shaft to adjust a contact pattern between the towershaft bevel gear associated with the towershaft of the accessory system and the first bevel gear associated with the drive shaft. ### Claim 11 A bearing housing assembly for coupling a drive shaft of an accessory having a first gear to a gear associated with an accessory system of a gas turbine engine, comprising: a mount including an interface to be coupled to the accessory and defining a central bore configured to receive the drive shaft; and a lock ring movable relative to the central bore and the drive shaft to adjust a contact pattern between the first gear of the drive shaft and the gear of the accessory system. ### Claim 12 (depends on 11) The bearing housing assembly of claim 11, wherein the mount includes a plurality of mounting bores spaced apart about a perimeter of the interface to couple the mount to the accessory. ### Claim 13 (depends on 12) The bearing housing assembly of claim 12, wherein the central bore defines a plurality of threads along a portion of the central bore, and the lock ring defines a plurality of threads to couple the lock ring to the mount. ### Claim 14 (depends on 13) The bearing housing assembly of claim 13, wherein the lock ring includes a first side opposite a second side, the plurality of threads of the lock ring extend from the first side to the second side, and the first side includes one or more descriptive markings to instruct an operator. ### Claim 15 (depends on 11) The bearing housing assembly of claim 11, further comprising at least one bearing received within the central bore to enable rotation of the drive shaft. ### Claim 16 (depends on 11) The bearing housing assembly of claim 11, wherein the gear of the accessory system is a towershaft bevel gear associated with a towershaft and the first gear of the drive shaft is a first bevel gear, and the lock ring is movable relative to the central bore and the drive shaft to adjust a contact pattern between the towershaft bevel gear associated with the towershaft of the accessory system and the first bevel gear associated with the drive shaft. ### Claim 17 (depends on 11) An accessory system for a gas turbine engine comprising at least one of the bearing housing assembly of claim 11.