A pump-controlled semi-active heave compensation system and its working method

Abstract

The invention relates to a pump control type semi-driving heave compensation system and a working method thereof and belongs to the field of deep sea exploration and operation. The system comprises acomposite hydraulic cylinder, a hydraulic power unit and a control unit. A three-cavity combined type hydraulic cylinder is adopted as the composite hydraulic cylinder. The composite hydraulic cylinder comprises a cavity C, a cavity A and a gas cavity B. The hydraulic powder unit comprises a bidirectional variable pump and a motor. One way of the bidirectional variable pump communicates with the cavity C through a first oil way by means of an oil opening A, another way communicates with the cavity A through a second oil way by means of an oil opening B, and the third way is connected with a low-pressure pump. The control unit comprises a compensation controller, a first pressure sensor, a second pressure sensor, a displacement sensor and a rotating speed sensor, wherein the first pressuresensor, the second pressure sensor, the displacement sensor and the rotating speed sensor are connected with the compensation controller. The bidirectional variable pump is also connected with the compensation controller which is further connected with a motion reference unit. The cavity B is connected with an adjusting gas bottle and a working gas bottle. According to the system, the system is designed by utilizing the high-pressure regeneration property of energy in the wave compensation process, and the compensation range is enlarged.

Description

technical field [0001] The invention relates to a pump-controlled semi-active heave compensation system and a working method thereof, belonging to the technical field of deep-sea detection and operation. Background technique [0002] With the continuous development of marine resources, people's attention and research on the ocean are deepening, and the engineering infrastructure in the field of deep-sea exploration is the basis for marine operations. However, during the installation process of the subsea production facilities in deep water, the position in the water needs to be kept unchanged, but because the mother ship is affected by the fluctuation of the sea surface, the mother ship will move up and down, which seriously interferes with the centering and installation of the subsea equipment. To be independent of effects due to waves, tides, etc., heave compensation systems are usually indispensable in deep water installations. [0003] Hydraulic transmission has been wi...

AI Technical Summary

Problems solved by technology

The valve-controlled hydraulic cylinder compensation system is characterized by fast response and large tonnage. However, since the valve-controlled hydraulic cylinder compensation system uses proportional valve throttling control to control the expansion and contraction speed and position of the hydraulic cylinder, the pressure drop at the orifice is all Heat is generated to heat up the oil, which makes the efficiency of the valve control system relatively low; the technology of the secondary motor control compensation system is relatively mature, but when dealing with large-tonnage, high-power and long-period operations, the diameter of the winch will be large, which cannot meet the space requirements

[0006] To sum up, most of the current hydraulic cylinder compensation devices have the characteristics of low passive compensation compensation accuracy, active compensation complex energy consumption, small hydraulic cylinder compensation range, etc., and the disadvantage of the existing systems is that they require advanced proportional servo valve control Driven by powerful hydraulic power, the overall comprehensive performance needs to be further optimized and upgraded

Images