Lifting gearboxes and jack-up offshore platforms

Abstract

The invention provides an elevating gearbox and a self-elevating ocean platform. The elevating gearbox comprises a speed-reducing parallel box and a planetary speed-reducing box connected with a first output shaft of the speed-reducing parallel box, the first output shaft is a sun gear shaft, the planetary speed-reducing box comprises a first end cap, a planetary frame arranged on the first end cap through first bearings, a gear ring arranged on the planetary frame through second bearings and provided with internal teeth and external teeth, planetary gears fixed oppositely to the planetary frame and meshed with the sun gear shaft and the internal teeth of the gear ring respectively, a first climbing gear in transmission connection with the planetary frame, an idle gear meshed with the external teeth of the gear ring, a driven gear meshed with the idle gear, a second output shaft in transmission connection with the driven gear, and a second climbing gear in transmission connection with the second output shaft. By adopting a differential planetary structure, a single-drive double-output mode is formed, and the first climbing gear and the second climbing gear can work synchronously, so that synchronism deviation is reduced, and reliability of the self-elevating ocean platform is improved.

Description

Technical field [0001] The invention relates to the technical field of jack-up ocean platform lifting, and more specifically, to a lifting gear box and a jack-up ocean platform. Background technique [0002] With the emergence of the energy crisis, the development of marine resources has become an important industry. The development of marine resources has shifted from the initial offshore and shallow seas to the deep sea, and marine platforms for the development of marine resources have emerged. Among various offshore platforms, jack-up offshore platforms are widely used because of their high reliability, flexible operation, less steel consumption, and adaptability to various marine working conditions. [0003] For jack-up offshore platforms, lifting gearboxes are key equipment. The lifting of the entire jack-up offshore platform is realized by lifting the gear box lifting leg. The lifting gearbox mainly includes: a reduction parallel box and a planetary reduction box connected ...

AI Technical Summary

Problems solved by technology

However, synchronous control of multiple drive motors is prone to deviations, resulting in synchronous deviations of the lifting gears, resulting in inability to lift or unstable lifting, which affects the reliability of the jack-up offshore platform

[0005] In addition, multiple lifting gearboxes are required, resulting in a larger installation space required for the lifting gearboxes

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