| 摘要 |
The second unison ring portion(140) is co-axial with the first unison ring portion (110). The first unison ring portion comprises a first unison ring (120) and a first bearing location portion (130), and the second unison ring portion comprises a second unison ring (150) and a second bearing location portion (160). The first bearing location portion is co-axial with the first unison ring and projects axially from the first unison ring, while the second bearing location portion is co-axial with the second unison ring and projects axially from the second unison ring. The first bearing location portion comprises a radially outwardly opening groove (132), and the second bearing location portion comprising a radially inwardly opening groove 162). The first unison ring portion and the second unison ring portion are positioned with the first bearing location portion being concentric with the second bearing location portion thereby defining an annular cavity (190) therebetween. |
