| 摘要 |
A reinforcing tube 1 is inserted into the hollow core of a windshaft 2 and anchored 7,8 and 9 at each end. The tube is preferably tensioned to provide a degree of precompression in the windshaft. Alternative forms of anchors may be used. The ends of the tube may be fitted with closing and bearing devices 10, 11 and 12 to support the striking rod 5 which passes through the windshaft and provide weathertight seals and means of lubricating the striking rod. The device may be applied to existing hollow windshafts of whatever construction, or to new constructions. An extension tube (15, fig 4) may be used to locate the stocks for the windmill sails when a poll end canister is used. The tube may be replaced by a solid bar if a striking rod is not required. |
