Novel rotation system of large-scale floating crane

Abstract

The invention relates to a novel rotation system of a large-scale floating crane, which comprises a rotary driving device and a central rotation supporting device. The bottom of the rotary driving device is connected with a plurality groups of chain-type roller devices, and each group of chain-type roller device comprises a support. A plurality of rollers are arranged at the outer part of the support, and the rollers are connected through chains. A connecting piece is arranged at the middle part inside the support. The chain-type roller devices are connected with the central rotation supporting device through the connecting piece. The invention has the advantages that the overall carrying capacity is strong, the economic performance is high, the structure is compact, and the roller groups can be arranged in the right position according to the load transmitting condition.

Description

Technical field: [0001] The invention relates to a slewing system, in particular to a new slewing system of a large floating crane. Background technique: [0002] With the development of offshore oil and gas resources in various countries, the offshore heavy industry has gradually developed and grown. Floating cranes have developed into an indispensable lifting equipment for offshore operations. They are widely used in offshore engineering, offshore salvage, offshore pipe laying, and the disassembly and installation of offshore platforms. When it comes to large-scale floating cranes, the lifting capacity of floating cranes has also developed from the initial tens of tons to the current thousands of tons or even tens of thousands of tons. type floating crane. The slewing system is an important part of the large full-turn floating crane. Whether its design is reasonable or not will seriously affect the operation safety of the floating crane. The overall structural height of ...

AI Technical Summary

Problems solved by technology

The slewing system is an important part of the large full-turn floating crane. Whether its design is reasonable or not will seriously affect the operation safety of the floating crane. The overall structural height of the system is large, and the center of gravity is relatively high. Due to the use of the balance beam structure, the wheel pressure of each roller is equal, but the load of a single roller is relatively large, and the size of the slewing bearing structure is large, and the center of gravity is relatively high. The stability is poor during operation and it is easy to cause shaking. Therefore, the desktop slewing system is more suitable for small full-slewing floating cranes, while the double-row roller slewing system has a compact slewing support structure, the smallest height, and high stability during slewing. Because it adopts the form of dense rollers, the weight of the whole device is relatively large. If the whole machine is lifted by floating, the bearing capacity of the entire slewing support device can only be improved by increasing the number of roller rows, and the vertical load is not uniform on all the rollers. Distributed, thus causing a waste of part of the roller

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