Variable-pitch axial-flow fan rotor - has annular lubricant chamber between inner ring and outer one supporting blade spindle

摘要

The supporting ring accommodates the blade-spindle bearings, and levers on the spindles are adjusted together. The lubricant chamber (26) inside the supporting ring (14) is contained between outer and inner rings (20,22) in the latter, the bearings (28) and the spaces between them in the peripheral direction being filled with lubricant. The inner and outer rings can be separate components joined together, the chamber being first formed in one of them. ADVANTAGE - Simple to produce and improves blade-spindle lubrication.