| 摘要 |
<p>A bottom head dome assembly (100) which includes, in one embodiment, a bottom head dome (102) and a liner (104) configured to be positioned proximate the bottom head dome (102). The bottom head dome (102) has a plurality of openings (106) extending therethrough. The liner (104) also has a plurality of openings (112) extending therethrough, and each liner opening (112) aligns with a respective bottom head dome opening (106). A seal (120) is formed, such as by welding, between the liner (104) and the bottom head dome (102) to resist entry of water between the liner (104) and the bottom head dome (102) at the edge (118) of the liner (104). In the one embodiment, a plurality of stub tubes (122) are secured to the liner (104). Each stub tube (122) has a bore (124) extending therethrough, and each stub tube bore (124) is coaxially aligned with a respective liner opening (112). A seat portion (126) is formed by each liner opening (112) for receiving a portion of the respective stub tube (122). The assembly (100) also includes a plurality of support shims (128) positioned between the bottom head dome (102) and the liner (104) for supporting the liner (104). In one embodiment, each support shim (128) includes a support stub (130) having a bore therethrough, and each support stub bore aligns with a respective bottom head dome opening (106). <IMAGE></p> |
