发明名称 |
A HYDRAULIC PITCH SYSTEM FOR A WIND TURBINE |
摘要 |
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. |
申请公布号 |
WO2013079071(A1) |
申请公布日期 |
2013.06.06 |
申请号 |
WO2012DK50435 |
申请日期 |
2012.11.28 |
申请人 |
VESTAS WIND SYSTEMS A/S |
发明人 |
NIELSEN, JAKOB HVIID;NIELSEN, SOEREN KJAER;MOELGAARD JEPPESEN, OLE;NEUBAUER, JESPER LYKKEGAARD |
分类号 |
F03D1/00;F03D7/02 |
主分类号 |
F03D1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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