Marine variable-frequency electric crane

Abstract

The invention relates to a marine variable-frequency electric crane which comprises a base, wherein a tower body is mounted at the top of the base through a slewing bearing; an arm support is mounted on one side of the tower body; a second tackle pulley is arranged at the head of the arm support; a first tackle pulley is arranged at the upper part of the arm support; one end of a hoisting wire rope is connected with a hoisting mechanism; a lifting hook is connected with the other end of the hoisting wire rope through the second tackle pulley; a variable-amplitude wire rope is connected between a bracket at the top of the tower body and the first tackle pulley; both of a swing mechanism and the hoisting mechanism are controlled by a variable-frequency motor. The marine variable-frequency electric crane has the advantages that the structure is compact and reasonable; the operation is convenient. Compared with the conventional hydraulic crane, as all actuating activities are driven through electric power, the marine variable-frequency electric crane further has the advantages that phenomena such as oil leak are avoided to reduce environment pollution; the reaction is fast; the operation is simple; the safety and stability are good.

Description

technical field [0001] The invention relates to the technical field of hoisting equipment, in particular to a marine frequency conversion electric crane. Background technique [0002] At present, most of the large cranes on bulk carriers still use the hydraulic drive system. The hydraulic system has some defects. The manufacturing process requires high requirements, and the oil needs to be replaced regularly, which is easy to cause oil leakage and pollute the environment. Contents of the invention [0003] Aiming at the shortcomings of the above-mentioned existing production technology, the applicant provides a marine frequency conversion electric crane with a reasonable structure, which adopts electric drive, saves energy, and has high safety and stability. [0004] The technical scheme adopted in the present invention is as follows: [0005] A marine frequency conversion electric crane includes a base, the top of the base is equipped with a tower body through a slewing ...

AI Technical Summary

Problems solved by technology

[0002] At present, most large-scale cranes on bulk carriers still use hydraulic drive systems. There are some defects in the hydraulic system. The manufacturing process requires high requirements, and the oil needs to be replaced regularly, which is easy to cause oil leakage and pollute the environment.

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