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Slew bearing, method for using a slew bearing, hoisting crane and vessel

Active Publication Date: 2020-05-08
ITREC BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During this time, the slewing bearings cannot perform their function, so the large structures they support cannot be used

Method used

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  • Slew bearing, method for using a slew bearing, hoisting crane and vessel
  • Slew bearing, method for using a slew bearing, hoisting crane and vessel
  • Slew bearing, method for using a slew bearing, hoisting crane and vessel

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Embodiment Construction

[0254] Although primarily presented for illustrative purposes with reference to one or more of the accompanying drawings, any of the technical features mentioned below may be combined alone with any independent claim of the present application, or in any combination with one or more other technical features. Other technically possible combinations.

[0255] figure 1 A part of a boat 1 is shown comprising a hull 3 with an opening 5 extending vertically through the hull 3 . For clarity, the figures have been rotated 90 degrees so that the vertical extension is parallel to the indicated Z-direction and the horizontal extension is parallel to the indicated X-direction.

[0256] The turret 7 is arranged at the opening 5 of the hull 3 . Turrets are generally cylindrical elements commonly used on floating production storage and offloading vessels. The vessel 1 is then equipped with hydrocarbon processing equipment for disconnection and treatment of the crude oil, water and gases t...

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PUM

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Abstract

The invention relates to a slew bearing comprising a stationary bearing ring to be fixed to a base, a moveable bearing ring to be fixed to a moveable object, wherein the stationary bearing ring and the moveable bearing ring are configured to enable rotation of the moveable bearing ring relative to the stationary bearing ring about a rotation axis. A main axial bearing and an auxiliary bearing areprovided between the stationary bearing ring and the moveable bearing ring, wherein the moveable bearing ring comprises one or more main portions and one or more auxiliary portions, which one or moremain portions are moveable relative to the one or more auxiliary portions between an operational position, in which the main axial bearing transfers the axial loads between moveable bearing ring and stationary bearing ring, and a raised maintenance position, in which the auxiliary axial bearing transfers the axial loads between moveable bearing ring and stationary bearing ring and the main bearingis allowed to be inspected and / or maintained so that the slew bearing during inspection and / or maintenance is still operational.

Description

technical field [0001] The present invention relates to a slewing bearing, a method of using a slewing bearing, a method of reconditioning a slewing bearing and raising and lowering cranes and ships. Background technique [0002] Swivel bearings are known to allow a large structure to rotate about a substantially vertical axis of rotation relative to a base while transferring gravitational, tilting and / or radial loads between the large structure and the base. [0003] An example of such a large structure is a hoisting crane, which is a large crane such as is used in the offshore industry. Lifting cranes have a crane structure comprising a crane housing and a jib, which is generally configured to pivot about a substantially horizontal axis. A slew bearing is then arranged between the crane housing and the base supporting the crane structure, allowing the crane structure and thus the jib to rotate about a vertical axis of rotation. [0004] Another example of such a large st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/10F16C19/30F16C21/00F16C19/54F16C17/26F16C17/10F16C33/58F16C33/60F16C43/00
CPCF16C17/10F16C17/26F16C19/10F16C19/305F16C19/545F16C21/00F16C33/585F16C33/60F16C33/605F16C43/00F16C2300/14F16C2326/30B66C23/84B66C23/52B66C23/16B66C23/62B66C2700/0321
Inventor W·J·斯洛布J·鲁登伯格H·J·韦宁
Owner ITREC BV