| 摘要 |
<p>This invention relates to a system for a turbine with a gaseous or liquideous working medium, in particular a wind turbine for a wind turbine generator. The turbine comprises a shaft (3), which is rotatable at a certain angular frequency, a hub (2), on which at least one turbine blade (1) is attached, and a hinge member (12, 13) disposed between said shaft (3) and hub (2). The hinge member comprises a bearing (12) and spring elements (13), together forming a rigidity (k) against movements in the hinge member(12, 13). The turbine blade (1) has a mass inertia factor relatively to the hinge member (12, 13) and is adapted to move through said gaseous or liquideous flow, which has a flow direction essentially perpendicular to the rotational plane of said turbine blade (1), and has a varying flow velocity in said direction such that the system is exposed to disturbance forces. An essential component of the disturbance forces has a disturbance frequency (&Omega;¿disturbance?) which is composed of said angular frequency (&Omega;¿rotation?) and the rigidity (k) of said hinge member (12, 13), the mass inertia factor (Jturbine) of said turbine blade (1) and the angular frequency (&Omega;¿rotation?) of said shaft (3) in the system has been selected such that the system is supercritical or subcritical. The invention also related to a wind turbine generator with such a system.</p> |
