Spiral lifting device for lifting self-lifting platform

Abstract

The invention discloses a spiral lifting device for lifting a self-lifting mobile platform. The spiral lifting device mainly comprises a pile leg with a spiral guide groove, a spiral guide wheel, a gear ring, a main gear, a driver, a top sliding device, a bottom sliding device and a locking mechanism, wherein the base of the driver is fixed on a platform body, the main gear is installed on the output end of the driver, the gear ring is fixed on the outer ring of the spiral guide wheel, the main gear is engaged with the gear ring, and the pile leg with the spiral guide groove penetrates through the inner hole of the spiral guide wheel and is engaged with the spiral guide wheel. During the lifting process of the platform, the driver drives the main gear to rotate, the main gear drives the gear ring to rotate, the gear ring drives the spiral guide wheel to rotate and the spiral guide wheel converts rotating motion into the lifting motion of the platform along the direction of the pile leg. After the platform is lifted, the locking mechanism is engaged with the gear ring to prevent the spiral guide wheel to rotate and achieve the goal of locking. The lifting device has the advantages that the structural strength is high, the driving load requirement is low, the load born by the locking mechanism is small, the locking position is not limited and the like.

Description

technical field [0001] The invention relates to a spiral lifting device for a self-elevating platform, which belongs to the field of marine engineering. Background technique [0002] With the continuous development of the offshore oil industry, various types of offshore platforms with different uses and suitable for different operating environments have been constructed and applied. Jack-up platforms have the advantages of strong positioning ability, good operation stability and low cost. , becoming the main force in the continental shelf oil exploration and development. Lifting capacity is a typical feature of jack-up platforms. At present, jack-up platforms mainly have the following lifting methods: 1. Hydraulic cylinder jacking type, through the cooperation of the main and auxiliary hydraulic cylinders, the platform lifts. However, due to its limited lifting pitch, continuous lifting cannot be achieved; resulting in large fluctuations in lifting acceleration and relative...

AI Technical Summary

Problems solved by technology

Because of the small contact area of ​​the meshing surface, the requirements for the mechanical properties of the rack and pinion are relatively high. At present, it mainly relies on imports; the driving load of the platform lifting is relatively large; the locking mechanism bears the vertical load, and the load is relatively large; similarly, the platform lifting device is arranged in On the deck of the platform, it takes up a lot of deck space

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