Steam generator, tube-bundle centering arrangement
AssigneeSiemens Aktiengesellschaft
InventorsWolfgang Berger, Hans Rottger
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Abstract
A steam generator has an upstanding tube bundle radially enclosed by a vertical cylindrical wall, the tube bundle being centered within the wall by a tube spacer grid connected to the inside of the wall by keys and keyways which can slide vertically relative to each other, relieving the tube bundle and wall from mechanical stressing due to vertical thermal expansion and contraction causing relative vertical movement between the tube bundle and wall.
Claims4
A steam generator having a tube sheet, a heat-exchanger tube bundle having ends mounted in said tube sheet and extending from said tube sheet, a cylindrical wall surrounding said tube bundle, at least one tube bundle tube spacer grid having a ring encircling said bundle inside of said cylindrical wall, and means for connecting said ring to said wall;
- wherein the improvement comprises said means being in the form of keys and keyways extending radially with respect to said ring and wall and relatively sliding longitudinally with respect to said tube bundle and wall when said ring and said wall thermally move relative to each other, while locking said ring non-rotatively relative to said wall.
Dependencies are inferred from the claim text.