Tension adjustment mechanism employing stepped or serrated ramps

Details Tension adjustment mechanism employing stepped or serrated ramps Tension adjustment mechanism employing stepped or serrated ramps

1996-12-23

1999-02-23

Graysay, Tamara L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Tension leg platform

4051951, 405224, 166359, 411535, E02D 534, E02D 576

Patent

active

058736786

ABSTRACT:
Vertical movement of a floating marine platform is reduced by tendons extending from the platform to anchors on the seabed. A final tension adjustment to equalize the load on all of the tendons is made by a respective tension adjustment mechanism incorporated into the top connector of each tendon. The tension adjustment mechanism includes a split load ring assembly having an upper ring and a lower ring. The upper ring and the lower ring abut each other at respective complementary surfaces. Each surface has a series of serrated ramps. A rotation of one ring with respect to the other causes the upper ring to climb over the lower ring to thereby increase the tension in the tendon. Rotation of the upper ring with respect to the lower ring, for example, is achieved by a motor driven gear ring.

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