# US 9,435,214 B2 · Turbomachine propeller blade setting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,214 B2 - Document ID: US9435214B2 - Status: Granted - Kind: B2 - Application number: 14/044,295 - Filed: 2013-10-02 - Published: 2014-04-10 - Granted: 2016-09-06 - Earliest claimed: 2012-10-04 - Assignees: Snecma - Applicants: Snecma - Inventors: Norman Jodet; Adrien Dubois; Rasika Fernando; Mathieu Gruber - Web page: https://patentgrep.com/patent/US9435214B2 ## CPC - F01D 7/00: Rotors with blades adjustable in operation; Control thereof (for reversing F01D1/30) - B64C 11/06: for variable-pitch blades - B64C 11/36: non-automatic - F02C 6/206: {the vehicles being airscrew driven} - F02K 3/06: with front fan - F05D 2260/74: by turning around an axis perpendicular the rotor centre line - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - B64C: AEROPLANES; HELICOPTERS - 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) - F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00) - 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 A device for setting a turbomachine propeller blade is provided. The setting device includes a first disc and a second disc respectively provided with first and second coupling devices, the first and second discs being coaxial; and a system for tilting at least one of the first and second discs with respect to the other. During a tilting of at least one of the first and second discs with respect to the other, the coupling distance of the at least one blade on the first and second discs remains constant, bringing about the rotation of the at least one blade. ## Claims ### Claim 1 A device for setting at least one blade of a turbomachine propeller, comprising: a first disc provided with first coupling means configured to cooperate with at least one first coupling point of said at least one blade for fixation on the first disc; a second disc provided with second coupling means configured to cooperate with at least one second coupling point of said at least one blade for fixation on the second disc, the first and second discs being coaxial; and means of tilting at least one of the first and second discs with respect to the other, the device being configured so that, during a tilting of at least one of the first and second discs with respect to the other, a coupling distance of said at least one blade on the first and second discs, which corresponds to a distance between said at least one first and one second coupling points cooperating respectively with the first and second coupling means, remains constant, bringing about rotation of said at least one blade, the first coupling means and the second coupling means being respectively configured to cooperate with said at least one first and one second coupling points by forming a slide type mechanical link, the means of tilting comprising actuators able to modify an orientation of at least one of the first and second discs with respect to the other and a distance separating the first and second discs, by a translation movement, and the means of tilting comprising a stop for the actuators so as to establish sliding between at least one of the first and second discs and the actuators. ### Claim 2 (depends on 1) The device according to claim 1, wherein the first and second coupling means comprise openings of substantially oblong shape to respectively enable the fixation of said at least one first and one second coupling points. ### Claim 3 (depends on 1) The device according to claim 1, wherein one of the first and second discs is fixed and the other of the first and second discs is movable. ### Claim 4 (depends on 1) The device according to claim 1, wherein the actuators are piston actuators. ### Claim 5 (depends on 1) The device according to claim 1, wherein the means of tilting further comprise a linear-spherical connecting joint to assure a link between at least one of the first and second discs, which is able to tilt, and an axis of the discs. ### Claim 6 (depends on 1) The device according to claim 1, further comprising a servo-control system of the actuators, which is able to control operation of the actuators as a function at least of one acoustic measurement. ### Claim 7 (depends on 6) The device according to claim 6, wherein the servo-control system of the actuators is able to control the operation of the actuators as a function of at least one acoustic measurement of the incoming flow. ### Claim 8 (depends on 6) The device according to claim 6, wherein said at least one acoustic measurement is performed around a turbomachine and/or close to a propeller comprising said device. ### Claim 9 (depends on 1) A propeller for a turbomachine comprising a device according to claim 1. ### Claim 10 (depends on 9) The propeller according to claim 9, comprising at least one blade provided with the at least one first coupling point and the at least one second coupling point cooperating respectively with the first and second coupling means of the device. ### Claim 11 (depends on 1) A turbomachine comprising a device according to claim 1. ### Claim 12 A method of setting at least one blade of a turbomachine propeller, comprising: fixing said at least one blade on a first disc provided with first coupling means and on a second disc provided with second coupling means, the first and second coupling means cooperating respectively with at least one first coupling point and at least one second coupling point of said at least one blade for fixation on the first and second discs, the first and second discs being coaxial, the first coupling means and the second coupling means being respectively configured to cooperate with said at least one first and one second coupling points forming a slide type mechanical link; tilting at least one of the first and second discs with respect to the other using means of tilting while maintaining constant a coupling distance of said at least one blade on the first and second discs, which corresponds to a distance between said at least one first and one second coupling points cooperating respectively with the first and second coupling means, thereby bringing about rotation of said at least one blade, the means of tilting comprising actuators able to modify the orientation of at least one of the first and second discs with respect to the other and the distance separating the first and second discs, by a translation movement, and a stop for the actuators so as to establish sliding between at least one of the first and second discs and the actuators. ### Claim 13 (depends on 12) The method according to claim 12, further comprising enslaving the actuators through a servo-control system, which is able to control operation of the actuators as a function at least of one acoustic measurement. ### Claim 14 (depends on 13) The method according to claim 13, wherein the servo-control system of the actuators is able to control the operation of the actuators as a function of at least one acoustic measurement of the incoming flow. ### Claim 15 (depends on 13) The method according to claim 13, wherein said at least one acoustic measurement is performed around a turbomachine and/or close to a propeller comprising said device.