# US 2018/0023418 A1 · Engine bearing damper with interrupted oil film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023418 A1 - Document ID: US20180023418A1 - Status: Published application - Kind: A1 - Application number: 15/216,180 - Filed: 2016-07-21 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: United Technologies Corporation - Applicants: United Technologies Corporation - Inventors: Matthew J. Forcier - Web page: https://patentgrep.com/patent/US20180023418A1 ## CPC - F01D 25/164: {Flexible supports; Vibration damping means associated with the bearing} - F01D 25/183: {Sealing means} - F02C 3/04: having a turbine driving a compressor (power transmission arrangements F02C7/36; control of working fluid flow F02C9/16) - F02C 7/06: Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M) - F04D 29/056: Bearings - F04D 29/059: Roller bearings - F04D 29/668: {damping or preventing mechanical vibrations} - F16C 19/14: for both radial and axial load - F16C 19/16: with a single row of balls - F16C 27/045: {with a fluid film, e.g. squeeze film damping} - F16C 33/6674: {related to the amount supplied, e.g. gaps to restrict flow of the liquid} - F16C 33/6677: {from radial inside, e.g. via a passage through the shaft and/or inner ring} - F16C 35/04: in the case of ball or roller bearings - F16C 35/077: between housing and outer race ring - F16F 15/0237: {involving squeeze-film damping} - F05D 2220/32: in gas turbines - F05D 2240/60: Shafts - F16C 19/54: Systems consisting of a plurality of bearings with rolling friction (spindle bearings F16C35/08) - F16C 2360/23: Gas turbine engines - 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) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract Aspects of the disclosure are directed to an engine oil damper comprising: a bearing support, and a housing radially outward from the bearing support and co-axial with the bearing support, where at least one oil flow restrictor is formed with respect to at least one of the bearing support and the housing, where the at least one oil flow restrictor is configured to at least partially interrupt a flow of oil in an annulus radially defined between the bearing support and the housing. ## Claims ### Claim 1 An engine oil damper comprising: a bearing support; and a housing radially outward from the bearing support and co-axial with the bearing support; wherein at least one oil flow restrictor is formed with respect to at least one of the bearing support and the housing, wherein the at least one oil flow restrictor is configured to at least partially interrupt a flow of oil in an annulus radially defined between the bearing support and the housing. ### Claim 2 (depends on 1) The engine oil damper of claim 1, wherein the at least one oil flow restrictor includes a plurality of oil flow restrictors. ### Claim 3 (depends on 2) The engine oil damper of claim 2, wherein a first dimension of a first of the oil flow restrictors is different from a second counterpart dimension of a second of the oil flow restrictors. ### Claim 4 (depends on 2) The engine oil damper of claim 2, wherein the plurality of oil flow restrictors includes at least three oil flow restrictors, and wherein a first spacing between the first and second oil flow restrictors is different from a second spacing between the second and third oil flow restrictors. ### Claim 5 (depends on 1) The engine oil damper of claim 1, wherein the at least one oil flow restrictor includes first and second walls that project in a substantially radial reference direction between a floor and a ceiling. ### Claim 6 (depends on 1) The engine oil damper of claim 1, wherein the at least one oil flow restrictor is defined with respect to the housing. ### Claim 7 (depends on 1) The engine oil damper of claim 1, wherein the at least one oil flow restrictor is defined with respect to the bearing support. ### Claim 8 (depends on 7) The engine oil damper of claim 7, wherein a clearance between the bearing support and the housing varies around a circumference of the damper. ### Claim 9 (depends on 8) The engine oil damper of claim 8, wherein the clearance varies between a maximum value defined by a floor of the bearing support and a minimum value defined by a ceiling of the at least one oil flow restrictor. ### Claim 10 (depends on 9) The engine oil damper of claim 9, wherein the ceiling is radially inward of a stop clearance. ### Claim 11 (depends on 1) The engine oil damper of claim 1, further comprising: a first seal; and a second seal axially aft of the first seal, wherein the annulus is axially defined between the first seal and the second seal. ### Claim 12 (depends on 1) The engine oil damper of claim 1, wherein the annulus is continuous around a circumference of the damper. ### Claim 13 (depends on 1) The engine oil damper of claim 1, further comprising: an axial seal associated with the at least one oil flow restrictor. ### Claim 14 An engine comprising: a compressor; a combustor located axially aft of the compressor; a turbine located axially aft of the combustor; a shaft coupled to the compressor and the turbine; and an engine oil damper including: a bearing support coupled to the shaft; and a housing radially outward from the bearing support; wherein at least one oil flow restrictor is formed with respect to at least one of the bearing support and the housing, wherein the at least one oil flow restrictor is configured to at least partially interrupt a flow of oil in an annulus radially defined between the bearing support and the housing. ### Claim 15 (depends on 14) The engine of claim 14, wherein the at least one oil flow restrictor is defined with respect to the bearing support, wherein a clearance between the bearing support and the housing varies around a circumference of the damper, wherein the clearance varies between a maximum value defined by a floor of the bearing support and a minimum value defined by a ceiling of the at least one oil flow restrictor, and wherein the ceiling is radially inward of a stop clearance. ### Claim 16 An engine oil damper comprising: a bearing support; and a housing radially outward from the bearing support and co-axial with the bearing support; where the housing includes a circumferential perimeter that includes a plurality of radial projections such that a first radial clearance distance between the housing and the bearing support is less between each of the plurality of radial projections and the bearing support than a second radial clearance distance between the housing circumferential perimeter adjacent to one of the radial projections and the bearing support.