Loading patent…
AssigneeMesserschmitt-Boelkow-Blohm GmbH
InventorsGuenther Schmidt, Peter Schmid
Estimating the term…
The wall of a structural component that is subject to high thermal and mechanical stress, such as a position control rocket drive, has a plurality of grooves in its surface for an improved heat discharge by radiation emission. The grooves are cut into the wall surface and have a substantially U-type cross-sectional shape with parallel sidewalls and a substantially rounded groove bottom. The heat emission efficiency is substantially improved by making the groove depth (t) to be about 100 .mu.m and the groove width (b) to be at least 20% of the groove depth, thus (t/b) is at least 5. Additionally, the maximally permissable groove shape tolerance over the entire groove length must be .+-.1 .mu.m and the smallest spacing between neighboring grooves is about 10 .mu.m.
A surface structure for a wall of a structural component subject to high thermal and mechanical stress, comprising a plurality of substantially parallel closely spaced grooves having a substantially U-type cross-sectional shape with parallel side walls and with a substantially rounded groove bottom for avoiding a notching effect, said grooves having a groove depth (t) of about 100 .mu.m and such a groove width (b) that the ratio (t/b) is at least five, each groove having a given total groove length, each groove having a maximally permissible shape tolerance of .+-.1 .mu.m along said total groove length, said surface structure further comprising ribs between neighboring grooves, said ribs having a minimal rib width (a) of about 10 .mu.m, whereby an improved heat discharge by radiation emission is achieved.
Dependencies are inferred from the claim text.