Hydraulic cylinder type semi-active heave compensation device for crane

Abstract

The invention discloses a hydraulic cylinder type semi-active heave compensation device for a crane. The hydraulic cylinder type semi-active heave compensation device is applied to a deepwater crane and comprises a passive compensation system, an active compensation system and a hydraulic cylinder pulley system. According to the hydraulic cylinder type semi-active heave compensation device for the crane, two parallel pulley blocks are mounted at one end of a piston rod stretching-out part, so that the compensation capacity is improved by four times, the compensation speed is decreased to be a quarter of the compensation speed in the prior art, and the collision influence caused by an excessively high speed is reduced. When a passive compensation way is adopted, a rod cavity of a passive compensation cylinder is connected with a rodless cavity of a compensation cylinder through an oil pipe, a rodless cavity of the passive compensation cylinder is connected with a gas cylinder and an air pressurizing system, and thus most heave displacement is compensated; and when an active compensation mode is adopted, a tension sensor is arranged at the position where a mooring rope passes, an analog signal for tension changes of the mooring rope is transmitted to a controller, a piston rod of the active compensation cylinder is controlled to move by controlling a valve element of an electro-hydraulic proportional reversing valve, and finally accurate compensation is achieved. In this way, the hydraulic cylinder type semi-active heave compensation device for the crane has the advantages that energy consumption is low, the precision is high, and the compensation amplitude is large.

Description

technical field [0001] The invention relates to a heave compensating device with a hydraulic cylinder and a pulley block, in particular to a hydraulic cylinder type semi-active heave compensating device for a crane, which is used in the field of deep-sea resource exploration and development, and is mainly used on a crane to hoist a large underwater equipment. Background technique [0002] With the development and utilization of marine oil and gas resources, especially deep-sea oil and gas, the research of deep-sea high-tech equipment is particularly important. The installation of underwater equipment requires a special deep-water installation system, mainly including lifting devices, cables and lifting heavy objects. However, when working in deep sea, due to the heave movement of the installation mother ship, the heave movement of hoisting heavy objects is intensified, causing a sharp change in the tension of the cable, and in severe cases, the cable breaks, causing economi...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a heave compensation device that cooperates with a hydraulic cylinder and a pulley block in view of the deficiencies in the prior art. Most of the current hydraulic cylinder compensation devices have low passive compensation compensation accuracy and complex active compensation. Due to the disadvantages of large energy consumption and small compensation range of the hydraulic cylinder, the present invention combines the advantages of various compensation methods and improves the design of the hydraulic cylinder to increase the compensation range

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