公开(公告)号：US20140328679A1

公开(公告)日：2014-11-06

申请号：US14361968

申请日：2012-11-28

Applicant: Vestas Wind Systems A/S

Inventor： Jakob Hviid Nielsen ,  Soren Kjaer Nielsen ,  Ole Mølgaard Jeppesen ,  Jesper Lykkegaard Neubauer

IPC: F03D7/02 ,  F03D7/04

CPC classification number: F03D7/0264 ,  F03D7/0224 ,  F03D7/024 ,  F03D7/0244 ,  F03D7/0248 ,  F03D7/0268 ,  F03D7/04 ,  F03D80/50 ,  F05B2270/604 ,  Y02E10/723

Abstract: The present invention relates to a hydraulic pitch system for pitching a blade of a wind turbine having a hub by means of a hydraulic fluid. The system comprises at least one hydraulic cylinder for adjusting a pitch angle of the blade, the hydraulic cylinder comprising a pitch piston movable in the hydraulic cylinder, and a first port and a second port arranged on each side of the pitch piston, and an accumulator hydraulically connected to the cylinder. The system further comprises a pitch safety system adapted to maintain the blade in a predetermined pitch angle when a person is entering the hub of the wind turbine for service and/or maintenance, the pitch safety system comprising a first valve which by activation releases a pressure in the hydraulic pitch system by draining off the accumulator for the hydraulic fluid until the pressure has reached a predetermined pressure level.

Abstract translation: 本发明涉及一种用于通过液压流体对具有轮毂的风力涡轮机叶片进行俯仰的液压俯仰系统。 该系统包括至少一个液压缸，用于调节叶片的俯仰角，液压缸包括可在液压缸中移动的俯仰活塞，以及布置在俯仰活塞的每一侧的第一端口和第二端口，以及蓄能器 液压连接到气缸。 该系统还包括桨距安全系统，其适于在人进入风力涡轮机的轮毂进行维修和/或维护时将叶片保持在预定桨距角，桨距安全系统包括第一阀，其通过激活释放压力 在液压桨距系统中，通过排出用于液压流体的蓄能器，直到压力达到预定压力水平。

公开(公告)号：US09926908B2

公开(公告)日：2018-03-27

申请号：US14361968

申请日：2012-11-28

Applicant: Vestas Wind Systems A/S

Inventor： Jakob Hviid Nielsen ,  Soren Kjaer Nielsen ,  Ole Mølgaard Jeppesen ,  Jesper Lykkegaard Neubauer

IPC: F03D7/02 ,  F03D7/04 ,  F03D80/50

CPC classification number: F03D7/0264 ,  F03D7/0224 ,  F03D7/024 ,  F03D7/0244 ,  F03D7/0248 ,  F03D7/0268 ,  F03D7/04 ,  F03D80/50 ,  F05B2270/604 ,  Y02E10/723

Abstract: The present invention relates to a hydraulic pitch system for pitching a blade of a wind turbine having a hub by means of a hydraulic fluid. The system comprises at least one hydraulic cylinder for adjusting a pitch angle of the blade, the hydraulic cylinder comprising a pitch piston movable in the hydraulic cylinder, and a first port and a second port arranged on each side of the pitch piston, and an accumulator hydraulically connected to the cylinder. The system further comprises a pitch safety system adapted to maintain the blade in a predetermined pitch angle when a person is entering the hub of the wind turbine for service and/or maintenance, the pitch safety system comprising a first valve which by activation releases a pressure in the hydraulic pitch system by draining off the accumulator for the hydraulic fluid until the pressure has reached a predetermined pressure level.