# US 11,306,596 B2 · Gas turbine blade impulse body module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,596 B2 - Document ID: US11306596B2 - Status: Granted - Kind: B2 - Application number: 16/712,513 - Filed: 2019-12-12 - Published: 2020-06-18 - Granted: 2022-04-19 - Earliest claimed: 2018-12-13 - Assignees: MTU Aero Engines AG - Applicants: MTU Aero Engines AG - Inventors: Karl-Hermann Richter; Herbert Hanrieder; Steffen Gerloff - Web page: https://patentgrep.com/patent/US11306596B2 ## CPC - F01D 5/16: for counteracting blade vibration - F01D 5/26: Antivibration means not restricted to blade form or construction or to blade-to-blade connections {or to the use of particular materials} - F16F 7/10: using inertia effect (F16F13/108, F16F13/22, F16F15/10, F16F15/22 take precedence; stabilising vehicle bodies by means of movable masses B62D37/04; protection of buildings against vibrations or shocks by mass dampers E04H9/0215; arrangements or devices for damping mechanical oscillations of power lines H02G7/14) - B23K 2101/001: {Turbines} - F01D 5/147: {Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18)} - F01D 9/041: {using blades (F01D5/148 takes precedence)} - F05D 2230/238: Soldering - F05D 2230/51: in a modular way, e.g. using several identical or complementary parts or features - F05D 2240/11: Shroud seal segments - F05D 2250/241: spherical - F05D 2260/96: Preventing, counteracting or reducing vibration or noise - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract The present invention relates to an impulse body module group with at least two impulse body modules, which, in particular, are identical in construction, for a gas turbine blade, wherein each of the impulse body modules comprises a housing, which, in particular, is of one piece and which has a first cavity, which is closed, in particular in an airtight manner, by a first cover, which is joined to the housing, in particular in a material-bonded manner, and in which a single, in particular spherical or cylindrical, first impulse body is accommodated with play of movement in at least one first direction of impact, wherein the housing has no additional cavity or a single additional cavity, in which a single, in particular spherical or cylindrical, additional impulse body is accommodated with play of movement in at least one direction of impact. ## Claims ### Claim 1 An impulse body module group with at least two impulse body modules, which are identical in construction, for a gas turbine blade, wherein each of the impulse body modules comprises a housing, which is of one piece and which has a cavity, which is closed in an airtight manner, by a cover, which is joined to the housing in a material-bonded manner, and in which a single spherical or cylindrical impulse body is accommodated with play of movement in at least one first direction of impact, wherein the housing of each of the impulse body modules has no additional cavity and has no additional spherical or cylindrical impulse body accommodated with play of movement in at least one direction of impact, and wherein at least two impulse body modules are joined together in a non-destructive detachable manner, in a permanent manner, in a friction-fitting manner, in a form-fitting manner, in a material-bonded manner, by at least one clamping element, are arranged one above the other in the first direction of impact or are arranged next to one another transverse to the first direction of impact. ### Claim 2 (depends on 1) The impulse body module group according to claim 1, wherein the at least two impulse body modules are a first impulse body module, having a first cover, and a second impulse body module, having a second cover; the first cover and the second cover being located on opposite sides of the impulse body module group relative to each other. ### Claim 3 (depends on 1) The impulse body module group according to claim 1, wherein the housing and/or the cavity have at least one plane of symmetry and is cylindrical or cuboid in shape. ### Claim 4 (depends on 1) The impulse body module group according to claim 1, wherein the cover is centered at the housing in a form-fitting manner or rests or rest flat on the housing. ### Claim 5 (depends on 1) The impulse body module group according to claim 1, wherein a selected wall thickness of the cavity of the housing varies by at most 25% relative to any wall thickness of the cavity of the housing or the wall thickness of the cavity of the housing is at least 1% and at most 50% of a diameter of the impulse body accommodated in it. ### Claim 6 (depends on 1) The impulse body module group according to claim 1, wherein a play of movement of the impulse body in the respective direction of impact in the cavity in which it is accommodated is at least 1% and/or at most 500% of its diameter, and/or at least two times and/or at most one-hundred times a play of movement in a guiding direction transverse to this direction of impact. ### Claim 7 (depends on 1) The impulse body module group according to claim 1, wherein the impulse body modules are arranged in an L shape, in a C shape, in a ring shape, a rectangular and/or square ring shape, or in a shape that is formed from two or more suchlike shapes. ### Claim 8 (depends on 1) The impulse body module group according to claim 1, wherein the impulse body module group comprises at least one first impulse body module group and at least one second impulse body module group, the at least one first impulse body module group and the at least one second impulse body module group are configured as an assembly, wherein the at least one first impulse body module group and the at least one second impulse body module group have different numbers of impulse body modules each of which are identical in construction. ### Claim 9 (depends on 1) The impulse body module group according to claim 1, wherein the impulse body module group is configured in a gas turbine blade and arranged at an outer or inner shroud. ### Claim 10 (depends on 1) The impulse body module group according to claim 1, wherein the impulse body module group is arranged in a cavity of the gas turbine blade and/or is fastened in a friction-fitting manner, in a form-fitting manner, and/or in a material-bonded manner, and/or by the at least one clamping element. ### Claim 11 (depends on 1) The impulse body module group according to claim 1, wherein the impulse body module group is configured and arranged in an assembly for reducing vibrations of a plurality of gas turbine blades. ### Claim 12 (depends on 1) The impulse body module group according to claim 1, wherein the cavity of each of the impulse body modules is produced by machining, electrical material removal, primary shaping, or extrusion; and the housing is produced from bar material, wherein the impulse body module group, is arranged in a cavity of the gas turbine blade.