Underwater drawing body passive heave compensation system based on constant pressure difference

A passive heave compensation, underwater tow body technology, applied in tow/push equipment, ship parts, transportation and packaging, etc., can solve the compensation system's poor adaptive ability and robustness, difficult steady-state operating point, and bulky volume. and other problems, to achieve the effect of improving the heave compensation accuracy, simple structure and improving ship loadability.

Inactive Publication Date: 2008-12-03
ZHEJIANG UNIV
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Problems solved by technology

This technical solution is not only complex in structure and bulky, but also the larger the volume of the gas storage cylinder, the worse the adaptive ability and robustness of the compensation system, and the higher the accuracy of the system's initial steady-state operating point. In the changing marine environment, it is very difficult to directly and accurately measure the steady-state operating point

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  • Underwater drawing body passive heave compensation system based on constant pressure difference

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with drawings and embodiments.

[0016] As shown in the drawings, the present invention includes: the output end of the first one-way valve 7 in the oil supply system is divided into three routes, the first route is connected to the oil inlet of the proportional relief valve 6, and the second route is connected to the pressure reducing valve 8 The oil inlet, the third road is divided into three roads after passing through the first cut-off valve 10, the first road is connected to the pressure sensor 13, the second road is connected to the accumulator 14, and the third road is connected to the hydraulic motor through the second cut-off valve 15 16 High-pressure cavity, hydraulic motor 16 Low-pressure cavity is divided into two circuits, the first circuit is connected to the oil inlet port of the pilot relief valve 17, and the second circuit is connected to the oil outlet port of the pressure reducing val...

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Abstract

The present invention discloses one kind of passive heave compensation system based on constant pressure difference for underwater drawn body. The present invention establishes constant pressure difference between two cavities of hydraulic motor of the winch for driving the underwater drawn body with constant flow pump, proportional overflow valve, pilot operated compound-relief valve, small volume accumulator and pressure reducing valve. The present invention is equivalent to a conventional passive heave compensation system with infinite gas storage cylinder, and has raised heave compensation precision. The present invention realizes the passive heave compensation through constituting secondary measurement and control system with stable state working point, with small volume accumulator, pressure sensor, depth sensor and controller, on-line calculating the stable state working point of passive heave compensation system and regulating the pressure of the proportional overflow valve.

Description

technical field [0001] The invention relates to the field of fluid transmission and control characterized by mechanical, electrical and hydraulic control technologies, and relates to a passive heave compensation hydraulic system and control method for an underwater drag body based on a constant pressure difference. Background technique [0002] During the irregular motion of the waves, the ship on the water surface will produce six degrees of freedom swinging motions around its original equilibrium position: surge, sway, heave, pitch, roll, and yaw. Under harsh sea conditions, the violent movement of the mother ship drives the position of the underwater towing body in the towed state to change, and the towing cable of the towing body is subjected to repeated impacts of high tension. The large uncontrolled movement of the towed body and the drastic change of the tension of the towed cable not only affect the normal operation of the sensors in the towed body, but also pose a g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B21/66
Inventor 王庆丰王海波
Owner ZHEJIANG UNIV
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