# US 11,306,697 B2 · Spar cap for a wind turbine blade of a wind turbine, wind turbine blade, wind turbine and method for manufacturing a spar cap for a wind turbine blade of a wind turbine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,697 B2 - Document ID: US11306697B2 - Status: Granted - Kind: B2 - Application number: 16/834,314 - Filed: 2020-03-30 - Published: 2020-10-08 - Granted: 2022-04-19 - Earliest claimed: 2019-04-03 - Assignees: Siemens Gamesa Renewable Energy A/S - Applicants: Siemens Gamesa Renewable Energy A/S - Inventors: Donato Girolamo; Poul-Erik Hassing; Jens Kjaer Nielsen - Web page: https://patentgrep.com/patent/US11306697B2 ## CPC - F03D 1/0675: {of the blades} - F03D 80/00: Details, components or accessories not provided for in groups F03D1/00 - F03D17/00 - Y02E 10/72: Wind turbines with rotation axis in wind direction - F03D: WIND MOTORS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Provided is a spar cap for a wind turbine blade of a wind turbine, the spar cap including at least two stacks arranged in a longitudinal direction of the spar cap, wherein the at least two stacks are arranged adjacent to one another in a width direction of the spar cap and each of the at least two stacks) includes multiple elongate beams stacked on top of one another in a height direction of the spar cap, the height direction being transverse to the longitudinal direction and the width direction. Also provided is a wind turbine blade of a wind turbine, a wind turbine and method for manufacturing a spar cap for a wind turbine blade of a wind turbine. ## Claims ### Claim 1 A spar cap for a wind turbine blade of a wind turbine, the spar cap comprising at least two stacks arranged in a longitudinal direction of the spar cap, wherein the at least two stacks are arranged adjacent to one another in a width direction of the spar cap and each of the at least two stacks comprises multiple elongate beams stacked on top of one another in a height direction of the spar cap, the height direction being transverse to the longitudinal direction and the width direction, wherein the spar cap further comprises a gap limiter comprising a first wedge element, a second wedge element and a limit strip, wherein the limit strip is a precasted layer material, wherein the first wedge element is arranged adjacent to a first outer stack and the second wedge element is arranged adjacent to a second outer stack, wherein the first outer stack and the second outer stack are of the at least two stacks and are located opposite to one another in the width direction, and wherein the first wedge element is connected to the second wedge element by the limit strip. ### Claim 2 (depends on 1) The spar cap according to claim 1, wherein the limit strip is preloaded by the at least two stacks, so that the first wedge element and the second wedge element are forced towards one another. ### Claim 3 (depends on 1) The spar cap according to claim 1, wherein the first wedge element and the second wedge element are arranged opposite to each other in the width direction. ### Claim 4 (depends on 1) The spar cap according to claim 1, wherein the limit strip is connected to at least one of a bottom side of the first wedge element and a bottom side of the second wedge element. ### Claim 5 (depends on 1) The spar cap according to claim 1, wherein the limit strip is connected to at least one of the first wedge element and the second wedge element by an adhesive. ### Claim 6 (depends on 1) The spar cap according to claim 1, wherein the limit strip is a flexible layer material. ### Claim 7 (depends on 1) The spar cap according to claim 1, wherein the limit strip is a glass layer material, made of at least one of a glass-fiber biax fabric and at least one glass-fiber mesh fabric. ### Claim 8 (depends on 1) The spar cap according to claim 1, wherein the limit strip comprises multiple tunnels, which can be flowed through by a resin. ### Claim 9 (depends on 1) The spar cap according to claim 1, wherein at least one longitudinal cut is arranged in at least one of the first wedge element and the second wedge element in or substantially in the longitudinal direction. ### Claim 10 (depends on 9) The spar cap according to claim 9, wherein at least one of the at least one longitudinal cut is a groove, the groove having a U-shape or V-shape. ### Claim 11 (depends on 1) The spar cap according to claim 1, wherein the spar cap comprises at least two gap limiters, which are arranged at a distance in the longitudinal direction from one another. ### Claim 12 (depends on 1) A wind turbine blade comprising a shell and a spar, the spar having at least one spar cap according to claim 1. ### Claim 13 (depends on 12) A wind turbine comprising at least one wind turbine blade according to claim 12. ### Claim 14 A method for manufacturing a spar cap for a wind turbine blade of a wind turbine, the spar cap comprising at least two stacks arranged in a longitudinal direction of the spar cap, wherein the at least two stacks are arranged adjacent to one another in a width direction of the spar cap and each of the at least two stacks comprises multiple elongate beams stacked on top of one another in a height direction of the spar cap, the height direction being transverse to the longitudinal direction and the width direction, the spar cap further comprising a gap limiter comprising a first wedge element, a second wedge element and a limit strip, wherein the limit strip is a precasted layer material, the method comprising the steps of: (a) arranging the limit strip on a spar cap mold, the spar cap mold having a curvature, (b) connecting the first wedge element and the second wedge element to the limit strip, and (c) arranging the at least two stacks on the limit strip and in between the first wedge element and the second wedge element, so that the first wedge element is arranged adjacent to a first outer stack and the second wedge element is arranged adjacent to a second outer stack, wherein the first outer stack and the second outer stack are of the at least two stacks and are located opposite to one another in the width direction. ### Claim 15 (depends on 14) The method according to claim 14, wherein the spar cap is casted on top of the spar cap mold.