# US 2018/0321073 A1 · Oil Level Sensor Tank for Turbine Engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0321073 A1 - Document ID: US20180321073A1 - Status: Published application - Kind: A1 - Application number: 15/969,134 - Filed: 2018-05-02 - Published: 2018-11-08 - Earliest claimed: 2017-05-03 - Assignees: Safran Aero Boosters SA - Applicants: Safran Aero Boosters SA - Inventors: Florian Cleyet; Alain Beaujean; Stéphane Bougelet - Web page: https://patentgrep.com/patent/US20180321073A1 ## CPC - G01F 23/22: by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water (involving the use of floats G01F23/30) - B64D 37/02: Tanks (tanks constructed integrally with aircraft wings B64C3/34) - B64D 37/04: Arrangement thereof in or on aircraft - B64D 37/06: Constructional adaptations thereof - F01D 25/18: Lubricating arrangements (of machines or engines in general F01M) - F01M 11/12: concerning lubricant level - F16N 19/003: {Indicating oil level (measuring liquid level in general G01F)} - G01F 23/26: by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields - G01F 23/80: Arrangements for signal processing - F05D 2220/30: in turbines - F05D 2230/60: Assembly methods - F05D 2260/98: Lubrication - F16N 2210/02: Turbines - F16N 2250/18: Level - G01F 23/24: by measuring variations of resistance of resistors due to contact with conductor fluid - G01F 23/263: by measuring variations in capacitance of capacitors - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING - F16N: LUBRICATING - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract An oil tank of a turbine engine, particularly of an aircraft turbojet includes an external wall forming a generally curved main cavity. This cavity includes an arched sensor for electrically measuring the oil level, for example in a capacitive manner. Said arched sensor matches the curvature of the main cavity in order to be integrated therein. Sensor supporting arms distributed along the curvature of the arched sensor and/or an arched sleeve with an arched cavity receive the arched sensor. A turbine engine is provided with an oil tank, as well as a method for mounting a sensor in an oil tank. ## Claims ### Claim 1 An oil tank assembly for a turbine engine, comprising: an external wall forming a generally curved main cavity; an arched sensor for electrically measuring an oil level within the main cavity, said arched sensor matching the curvature of the main cavity; and a plurality of supporting arms disposed within the main cavity for bearing the arched sensor. ### Claim 2 (depends on 1) Assembly according to claim 1, wherein the supporting arms extend from the external wall toward the inside of the main cavity. ### Claim 3 (depends on 1) Assembly according to claim 1, wherein the supporting arms comprise: holding surfaces arranged along the arched sensor. ### Claim 4 (depends on 1) Assembly according to claim 1, wherein the main cavity has a main elongation and a main curvature along said main elongation. ### Claim 5 (depends on 1) Assembly according to claim 1, wherein at least one or more or each supporting arms extend(s) from the arched sensor perpendicularly to the external wall. ### Claim 6 (depends on 1) Assembly according to claim 1, wherein the supporting arms comprise: guides surrounding the arched sensor. ### Claim 7 (depends on 6) Assembly according to claim 6, wherein the guides comprise: centering surfaces. ### Claim 8 (depends on 1) Assembly according to claim 1, wherein the supporting arms are distributed along the arched sensor. ### Claim 9 (depends on 1) Assembly according to claim 1, wherein the main cavity comprises: two first sections defining a space therebetween, and a section inserted between the first sections, the inserted section being mainly or totally outside said space. ### Claim 10 (depends on 1) Assembly according to claim 1, wherein the arched sensor comprises: an electrical conductor configured to be electrically powered such as to measure the oil level by being in electrical contact with the oil. ### Claim 11 An oil tank assembly for a turbine engine, comprising: an external wall forming a generally curved main cavity; an arched sensor for electrically measuring an oil level within the main cavity, said arched sensor matching the curvature of the main cavity; and an arched sleeve within which the arched sensor is disposed. ### Claim 12 (depends on 11) Assembly according to claim 11, wherein the sleeve is hinged through pivot connections. ### Claim 13 (depends on 11) Assembly according to claim 11, wherein the sleeve comprises: cut-outs. ### Claim 14 (depends on 13) Assembly according to claim 13, wherein the cut-outs divide the sleeve into several segments that are mobile with respect to one another. ### Claim 15 (depends on 11) Assembly according to claim 11, wherein the sleeve is directly connected to the external wall. ### Claim 16 Method for mounting a liquid level sensor in a tank of a turbine engine, the method comprising: (a) providing a tank with an external wall forming a generally curved main cavity; (b) providing an electrical, level measuring sensor, and disposing sensor supporting arms or an arched sleeve inside the main cavity; (c) inserting the sensor into the cavity while contacting the sensor supporting arms and/or with the arched sleeve such as to match the curvature of the cavity. ### Claim 17 (depends on 16) Method according to claim 16, wherein in the step (b) for providing a sensor, the sensor is straight, and during the insertion step (c), the sensor is deformed so as to arch it. ### Claim 18 (depends on 17) Method according to claim 17, wherein during the insertion step (c), the sensor is gradually arched as it enters into contact with the sensor supporting arms or with the arched sleeve. ### Claim 19 (depends on 16) Method according to claim 16, wherein in the step (b) for providing a sensor, the sensor is arched along a radius of curvature, and during the insertion step (c), the sensor retains its radius of curvature. ### Claim 20 (depends on 16) Method according to claim 16, wherein the tank comprises an opening, particularly a filling upper opening, and during the insertion step (c), the arched sensor is inserted via said opening.