Small tooth difference planet structure lifting gear case of self-elevating type ocean platform

Abstract

The invention relates to a planet structure lifting gear case of a self-elevating type ocean platform. The gear case comprises a case body, the case body comprises an end case body, a front case body, a middle case body and a bottom foot connecting base, wherein a small tooth difference gear train is used for first stage speed reduction, planetary gear trains are used for a second speed reduction stage and a third speed reduction stage, a center shaft of the small tooth difference gear train penetrates through the third speed reduction stage, the second speed reduction stage, a climbing gear shaft and a center tube shaft of an adjustable bearing pedestal and then is connected with an output shaft of a driving motor in a butted mode through an elastic coupler, a planet carrier of the front speed reduction stage is connected with a sun gear shaft of the next speed reduction stage through splines, and the planet carrier of the third stage is connected with the climbing gear shaft through splines; a pin hole type Z-X-V structure is adopted for the small tooth difference gear train; an NGW structure is adopted for the second-stage planet gear train and the third-stage planet gear train; the climbing gear shaft is supported between the bottom foot connecting base and the adjustable bearing pedestal through a bearing; the bottom foot connecting base and the adjustable bearing pedestal are respectively connected with supports of the self-elevating type ocean platform.

Description

technical field [0001] The invention relates to a speed reducer, in particular to a super-large modulus gearbox used for platform lifting in a self-elevating ocean platform. Background technique [0002] The jack-up offshore platform is suitable for the exploration and exploitation of oil and natural gas in the offshore area. As the key component device of the offshore oil drilling platform, the lifting system is a large-scale high-tech offshore engineering supporting equipment, which is highly valued in the design and manufacture of the platform. Its function is: before the drilling operation of the platform, lower the pile legs of the platform, lift the platform to a certain height on the sea surface and then ballast, so that the pile legs of the platform are firmly positioned on the seabed; after the platform completes the drilling operation, pull out the pile legs, The platform can be lowered to the sea surface, and can drift with the platform at a relatively shallow dra...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is: for the power source of the self-elevating marine platform planetary structure lifting gear box disclosed in the CN203239867U Chinese patent document, the power source bears a relatively large output torque, and long-term high torque output will affect the service life, and the center of gravity of the gear box and the The power source is located on one side of the foot connection seat, the gravity distribution is extremely unreasonable, and the balance of the support force of the foot connection seat after installation is extremely poor, resulting in problems such as unbalanced force on the connection bolts. It provides a compact structure, Self-elevating offshore platform lifting gearbox with large transmission ratio, large output torque, strong bearing capacity, good support balance and high reliability

Images