| 摘要 |
The present invention provides an integrated hub and bearing system (100) comprising a hub, configured for being connected to a main shaft of a turbine, and a bearing system comprising a plurality of bearing constructions, whereby each construction is adapted to support a turbine blade so as to be rotatable about a blade pitch axis, relative to the hub. Each bearing construction (105A, 105B, 5C) comprises a dynamic conical frame (110), configured for connection to a turbine blade, which has at least two circumferentially spaced dynamic frame legs (115), and further comprises a static conical frame (120), which has at least two circumferentially spaced static frame legs (125). The dynamic and static conical 10 frames are mutually overlapping. Each bearing construction further comprises first and second axially spaced bearings (150, 160), each having an inner ring and an outer ring, for rotationally supporting the dynamic conical frame (110) relative to the static conical frame (120). Thus, each of the dynamic and static conical frames has a hub-side and a blade-side bearing seat for one ring of the first and second bearings respectively. According to the invention, the hub comprises a central portion (130) that extends along an axis of the turbine main shaft and interconnects the hub-side bearing seat (126) of each static conical frame in a central region of the hub. Furthermore, heavily loaded parts of the integrated hub and bearing system are made from one or more high-strength materials, while other parts of the system are made from one or more relatively lightweight materials. |
