| 摘要 |
1287486 Seals; vibration dampers; springs GENERAL ELECTRIC CO 29 Dec 1969 [2 Jan 1969] 63031/69 Headings F2B and F2S A vibration damping ring 59 is positioned to circumferentially grip and exert a radial pressure against one or each shell member carrying a labyrinth seal component in a fluid handling apparatus, such as a gas turbine engine, so that the potentially destructive, selfexcited, aeroelastic, nodal flexural vibration of the shell member is reduced by heat-producing relative slip between the ring and the shell member, the ring being severed as shown in Fig. 2 to enable diametral opening and closing of the ring. A pin 72 is inserted between the ring ends 60, 61 to prevent the ring from escaping from its groove 64 in the rotary member which carries teeth 12 extending into sealing relationship with a sealing surface 14. The ring may be of solid or hollow construction and when employed on the rotary shell member 16 is urged outwardly against the rotary member 16 by centrifugal force and its inherent spring force whereby the relative slip generates heat and dissipates the vibrational energy. The vibrations may be characterized by both axially and circumferentially propagating nodal flexural waves, Figs. 3 and 4 (not shown); preferably the ring is positioned close to the position of maximum flexure. In another embodiment, Figs. 5 and 6 (not shown), the ring is inserted into its groove (64) in the rotary member through a gap (78) in the walls of the groove and is retained therein by a pin (72). |
