| 摘要 |
A wind braced turbine ventilator having a turbine head supported by an upwardly extending central shaft which sharply tapers to a point at each end thereof. The shaft is rotatably mounted to a stationary support structure through a pair of self-aligning bearing assemblies. The bearing assemblies comprise substantially spherical bearings having cavities therein for receiving the pointed ends of the central shaft so as to allow the latter to rotate freely therein. In addition, the bearings are mounted to the stationary support structure for movement relative thereto, which movement allows the bearings to remain in c0ntinuous alignment with each other for minimizing frictional drag.
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