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    Pitch system for a wind turbine blade
    5.
    发明授权
    Pitch system for a wind turbine blade 有权

    公开(公告)号：US12270371B2

    公开(公告)日：2025-04-08

    申请号：US18565156

    申请日：2022-06-08

    Applicant: Vestas Wind Systems A/S

    Inventor： Lasse Godballe Andersen ,  Erik Garde

    IPC: F03D1/06 ,  F03D7/02

    Abstract: A pitch actuator for a wind turbine pitch system, the pitch actuator having an actuator rod, a drive end of which is defined by a clevis fork arrangement having first fork member and a second fork member that extend in a direction along a rod axis and terminate at a tip end. The first and second fork members define respective clevis openings for receiving a clevis pin therethrough, said clevis openings each having an opening perimeter profile comprising: a first perimeter section defined by a leading circular arc that is centred on the rod axis and oriented in the direction of the tip end of the fork members, the circular arc defining a nominal radius and a central angle of less than 120 degrees, and second and third flared perimeter sections that flank respective sides of the first perimeter section, each of which define an enlarged clearance zone with respect to at least part of an imaginary circle defined by the nominal radius of the first perimeter section. A benefit of the invention is that the enlarged clearance zones defined by the flared perimeter sections create an area where there is no contact between the perimeter of the openings and the outer surface of the clevis pin. This provides a stress relieving function since deformation of the openings in use, due to force applied along the axis of the actuator rod, does not create a point of stress combined with sliding or rubbing movement with the sides of the clevis pin, thereby reducing wear and fatigue. The invention extends to a pitch system including such a pitch actuator and a wind turbine incorporating such a pitch system.

    Pitch system for a wind turbine blade
    6.
    发明授权
    Pitch system for a wind turbine blade 有权

    公开(公告)号：US12173685B2

    公开(公告)日：2024-12-24

    申请号：US18559349

    申请日：2022-03-07

    Applicant: Vestas Wind Systems A/S

    Inventor： Lasse Godballe Andersen ,  Erik Garde ,  Kris Kristensen Riisager

    IPC: F03D1/06

    Abstract: A pitch system for rotating a blade of a wind turbine relative to a hub. The pitch system comprises a blade bearing including an inner bearing ring and an outer bearing ring, wherein the outer bearing ring is rotatable relative to the inner bearing ring, and an actuator system configured to control relative rotational movement between the inner bearing ring and outer bearing ring, comprising. The actuator system comprises a first load transfer beam arrangement spanning at least first and second fixing positions associated with the inner bearing ring, a second load transfer beam arrangement spanning at least first and second fixing positions associated with the outer bearing ring, and a first linear actuator coupled between the first load transfer beam arrangement and the second load transfer beam arrangement. A benefit of the pitch system of the invention is that it achieves a reduction in mass yet retains a stiff connection between the hub and an associated blade. Therefore, larger and heavier blades can be coupled to the pitch system whilst mitigating a proportional increase in mass of the pitch system.

    A PITCH SYSTEM FOR A WIND TURBINE BLADE
    7.
    发明公开
    A PITCH SYSTEM FOR A WIND TURBINE BLADE 审中-公开

    公开(公告)号：US20240271595A1

    公开(公告)日：2024-08-15

    申请号：US18565156

    申请日：2022-06-08

    Applicant: Vestas Wind Systems A/S

    Inventor： Lasse Godballe Andersen ,  Erik Garde

    IPC: F03D1/06 ,  F03D7/02

    CPC classification number: F03D1/0664 ,  F03D7/0224 ,  F05B2260/507 ,  F05B2270/60

    Abstract: A pitch actuator for a wind turbine pitch system, the pitch actuator having an actuator rod, a drive end of which is defined by a clevis fork arrangement having first fork member and a second fork member that extend in a direction along a rod axis and terminate at a tip end. The first and second fork members define respective clevis openings for receiving a clevis pin therethrough, said clevis openings each having an opening perimeter profile comprising: a first perimeter section defined by a leading circular arc that is centred on the rod axis and oriented in the direction of the tip end of the fork members, the circular arc defining a nominal radius and a central angle of less than 120 degrees, and second and third flared perimeter sections that flank respective sides of the first perimeter section, each of which define an enlarged clearance zone with respect to at least part of an imaginary circle defined by the nominal radius of the first perimeter section. A benefit of the invention is that the enlarged clearance zones defined by the flared perimeter sections create an area where there is no contact between the perimeter of the openings and the outer surface of the clevis pin. This provides a stress relieving function since deformation of the openings in use, due to force applied along the axis of the actuator rod, does not create a point of stress combined with sliding or rubbing movement with the sides of the clevis pin, thereby reducing wear and fatigue. The invention extends to a pitch system including such a pitch actuator and a wind turbine incorporating such a pitch system.

    A PITCH SYSTEM FOR A WIND TURBINE BLADE
    8.
    发明公开
    A PITCH SYSTEM FOR A WIND TURBINE BLADE 审中-公开

    公开(公告)号：US20240240608A1

    公开(公告)日：2024-07-18

    申请号：US18559349

    申请日：2022-03-07

    Applicant: Vestas Wind Systems A/S

    Inventor： Lasse Godballe Andersen ,  Erilk Garde ,  Kris Kristensen Riisager

    IPC: F03D1/06

    CPC classification number: F03D1/0667 ,  F05B2260/50 ,  F05B2260/79

    Abstract: A pitch system for rotating a blade of a wind turbine relative to a hub. The pitch system comprises a blade bearing including an inner bearing ring and an outer bearing ring, wherein the outer bearing ring is rotatable relative to the inner bearing ring, and an actuator system configured to control relative rotational movement between the inner bearing ring and outer bearing ring, comprising. The actuator system comprises a first load transfer beam arrangement spanning at least first and second fixing positions associated with the inner bearing ring, a second load transfer beam arrangement spanning at least first and second fixing positions associated with the outer bearing ring, and a first linear actuator coupled between the first load transfer beam arrangement and the second load transfer beam arrangement. A benefit of the pitch system of the invention is that it achieves a reduction in mass yet retains a stiff connection between the hub and an associated blade. Therefore, larger and heavier blades can be coupled to the pitch system whilst mitigating a proportional increase in mass of the pitch system.

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