| 摘要 |
A cover 1 for covering a bladed rotor 3 during a testing operation has a face plate 10 of solid sheet like material having a centrally positioned orifice 11 through which air is drawn by the action of the parts of blades 4 adjacent to the orifice 11. The remaining parts of the blades 4 are in a stalled condition and therefore relatively unloaded. The power required to turn the rotor 3 is therefore reduced in comparison to that required if the cover 1 was not present which makes testing easier. The cover 1 also acts as a safety shroud preventing personnel coming into contact with the blades 4 as they rotate and containing the rotor 3 in the event of its disintegration. <IMAGE> |
