| 摘要 |
In a pipe diffuser, a plurality of circumferentially spaced generally radially extending passages (32), are formed in a disc (10) in such a way as to eliminate the need for plugs to prevent wandering of the drill bit during the drilling process. The passages are drilled, but not to the point of any substantial intersection between the adjacent passages. Material is then removed from the inner periphery of the disc (10) to the radial extent of a leading edge circle (39) defined by the leading edge of the islands (44) between the passages (32). The resulting structure is substantially equivalent in performance but is obtained with a much easier process. <IMAGE> |
