Reinforced Connections for Wind Turbine Stability

Special fastening bolt for wind power equipment that can protect the bolt head and threads from corrosion and rust during use, especially when exposed to moisture or humid environments. The bolt has an added connection protection component that seals and covers the bolt head and threads. The component consists of a movable ring, connecting rods, a mounting ring, and an iron block. The mounting ring has a connecting groove with a magnet inside. The rods are spaced around the bolt head and have mounting rings that slide over the bolt. The iron block covers the head. This allows the rods to move and expand as the bolt tightens, preventing loosening, while sealing and protecting the bolt head and threads.

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Wind turbine locking nut design to prevent bolts from loosening during turbine operation due to vibrations. The nut has a wind pin feature that inserts into the bolt and prevents rotation when the nut is tightened. This prevents loosening of the bolt-nut connection when the turbine blades rotate. The wind pin extends through the nut and slides into a chute on the bolt. A mounting ring separates the wind pin from the nut and then is pulled back to slide the wind pin into the nut chute. This fixes the wind pin in place inside the nut and prevents rotation when the nut is tightened.

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Threaded connection structure for wind turbine blades that improves strength and reduces stress concentration compared to standard threads. The connection uses a double-ended stud and a threaded sleeve. The stud has sections with gradually varying thread thickness and stiffness. The thicker, stiffer section is closer to the center of the stud. The sleeve threads engage both sections. This gradual transition of thread properties distributes the tightening force over more threads and reduces plastic deformation.

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A stud bolt design for wind turbine blades that reduces loosening and improves stability during vibration. The stud bolt has a top threaded rod with a through hole, a bottom threaded rod, and a side rod connecting them. A limiting mechanism on the side rod prevents the top and bottom rods from separating. The mechanism includes a sliding plate, limiting hole, limiting rod, and adjusting plate. Glue can be injected through the through hole to secure the rods to the workpieces. This prevents loosening due to vibration by mechanically locking the rods together.

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Large-size stud bolt for wind turbine blades that has an integrated design to improve fastening and prevent loosening during operation of heavy blades. The stud bolt has a main body with an integrated screw and connector. The screw threads into the base and the other end penetrates the blade. A rotating head attaches to the main body. A torsion gear engages with the rotating head. When tightening the bolt, the head rotates the torsion gear which drives a two-way screw rod. This in turn moves two pressing heads toward the blade holes to clamp them together. This provides additional tightening force to prevent loosening when the blades rotate.

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Internal bolts for wind turbine blade embedded bolt sleeves that prevent resin from entering the bolt sleeves during blade manufacturing. The bolts have features like slots, inflatable sealing rings, and gas channels to expand and seal against the inside of the bolt sleeves. This avoids resin leakage issues that can occur when bolts pass through the blade root and cause glue buildup. The inflatable seals allow the bolts to be inserted before or after the blade molding process, unlike conventional bolts that require precise timing to prevent resin entry.

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Combined wind turbine blade design with improved locking mechanism to prevent bolts from loosening and falling out. The blade has a power end and an extension end connected by a mechanism with locking slots and bolts. The locking mechanism includes connecting plates, bolts, and closing mechanisms. The closing mechanisms have movable covers with pressure springs to resist bolt heads and prevent loosening. This prevents bolts from falling out when exposed to wind and weather.

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Fatigue-resistant double-ended stud for wind turbine blade root connections that prevent fatigue failure of bolts compared to traditional bolts. The stud has inconsistent thread types at each end. One end has a blind hole thread fitting and the other end has a nut fitting. This allows the stud to be inserted into a blind hole on one component like a blade or pitch bearing and then secured with a nut on the other component like the hub or outer ring nut. The inconsistent thread types prevent the stud from unthreading during vibration and fatigue cycles. This prevents bolts from loosening and failing compared to traditional bolts with matched thread ends.

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Blade bolt pair and wind blade connection mechanism that prevents loosening and provides better stability compared to conventional blade bolts. The blade bolt has threads at both ends, but they rotate in opposite directions. This prevents the bolts from loosening because the threads at each end engage different nuts. The bolts also have blind holes at both ends to allow hex wrenches to access the nuts. The nuts have top surfaces that are staggered to prevent them from contacting when tightened.

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Fastener assembly for wind turbine blade-hub connections that prevents liquid ingress into the blade root inserts. The assembly has a fastener with a threaded portion to attach to the blade root and sleeves on the non-threaded part. The sleeves absorb liquid that bypasses the thread sealant to prevent it from reaching the blade root insert.

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Blade root pre-embedded bolt sleeve installation structure for wind turbine blades to improve blade root strength and prevent bolt sleeve pullout. The structure involves arranging multiple bolt sleeves circumferentially at the blade root, with wedge strips between adjacent sleeves and limit blocks to prevent relative movement. This provides multiple bolt interfaces to distribute load and prevent single sleeve pullout.

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Wind turbine blade root bolt sleeve and connection structure to improve blade-hub joint strength and longevity. The blade root bolt sleeve has a main screw section embedded in the blade root and a secondary screw section protruding from the blade end. Bolts through both sections connect the blade to the hub. This provides additional reinforcement compared to just a single embedded section. The raised secondary section and parallel auxiliary screw protrude from the blade end. The line connecting their centers points to the blade root center. This configuration increases bolt load capacity and prevents fractures compared to a single embedded section.

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Anti-loosening gasket group for wind power locking discs that prevents damage to inner lock rings and prevents bolt loosening. The gasket group has a specially shaped gasket and washers with features to restrict bolt rotation. Multiple bolt holes in the gasket prevent gasket rotation during tightening, preventing scratches on the inner lock ring. Anti-loosening features on the washers prevent reverse rotation of the bolts, preventing loosening. This eliminates issues like gasket scratches, misalignment, and loosening that occur with standard flat washers.

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Threaded bolts for wind turbine rotor blade connections that prevent seizure and simplify manufacturing. The bolts are made of a sliding material like brass instead of steel. This allows the bolts to move slightly without binding when the blades flex, preventing capture and seizure. The bolts are also designed for threading into bushings with a sliding material outer rose. This reduces friction and prevents seizure compared to using steel bolts. The bolts can be formed as one piece or as a separate threaded bushing fixed to a main bolt. The sliding material outer rose prevents the bolt from binding in the bushing assemblies.

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Coupling between a wind turbine blade and pitch bearing that reduces eccentricity between blade root and bearing holes to prevent bolt failure due to alternating loads. The coupling has a specially designed bolt with two coaxial sections perpendicular to the blade's longitudinal axis. The inner section aligns with the blade root hole, while the outer section aligns with the bearing hole. This allows the bolt to slide longitudinally between the sections during assembly to account for misalignment. The concentric shoulders in the holes control eccentricity and prevent bending stresses on the bolt.

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A pre-embedded bolt connection structure for large wind turbine blades that allows increased blade diameter without adding many bolts. The structure uses an adapter flange with misaligned holes in the blade root and hub connections. The flange has bolts that pass through the blade root holes and into the blade root prefabricated components. It also has bolts that pass through the hub hole and the flange's hub hole. This integrates the blade root and hub connections without needing extra bolts on the blade root. The prefabricated components inside the blade root provide a fixed position for the flange misalignment.

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Pre-embedded screw sleeve for wind turbine blades that improves bonding between the blade root and screws. The sleeve has two parts, a first sleeve with through holes for the blade root bolts and a second sleeve with threaded holes. The first sleeve has arced grooves on its outer surface. This design allows the first sleeve to be embedded into the blade root during manufacture. The arced grooves provide a better bonding surface between the sleeve and blade root compared to a circular surface. The threaded second sleeve attaches to the embedded first sleeve. This pre-embedded screw sleeve assembly improves the bond between the screws and blade root compared to separate screw sleeves.

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Connection structure for wind turbine blades that allows easy blade root bolt replacement without damaging the blade. The blade root has a threaded hole. A removable bush with an internal thread is screwed into the hole. The blade root connector bolt has an external thread that matches the internal thread. This allows the connector bolt to be easily replaced by unscrewing the bush instead of trying to remove a broken bolt from inside the blade.

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Wind turbine blade fixing device that reduces bolt failure and improves blade reliability by modifying the blade root and flange design. The device uses a thickened flange with positioning pins and a set screw to secure the blade root attachment. This prevents flange misalignment and dislocation issues that cause bolt fractures. The thickened flange also provides a stronger connection point for the bolts. The device involves modifying the blade root and flange structure to eliminate flange misalignment, prevent bolt fractures, and improve blade reliability.

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Protective device to prevent damage to hub lock washers in wind turbines during installation. The device consists of a modified hub bolt assembly with a rolling feature to guide and cushion the bolt insertion into the hub lock. The assembly has an inner connecting shaft, an outer roller, and a bearing. The roller is positioned on the outside of the bearing. When inserting the hub bolt, the roller rolls against the hub lock washer, reducing friction and preventing damage to the washer surface. The bearing allows the shaft to move inside.

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