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Positive displacement heave compensation hydraulic system and heavy compensation lifting system

A heave compensation and hydraulic system technology, applied in the field of heave compensation hydraulics, can solve the problems of different areas of the two chambers, the inability to balance large tonnage and high efficiency, and discharge back to the fuel tank, so as to reduce the number, improve system efficiency and control system flexibility , the effect of large tonnage efficiency

Active Publication Date: 2017-05-10
SHANGHAI ZHENHUA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen from this that the technology of the valve-controlled hydraulic cylinder compensation system and the secondary motor control compensation system are relatively mature, but there are deficiencies in each, and they cannot take into account both large tonnage and high efficiency, and the overall comprehensive performance needs to be further optimized and upgraded
[0008] In addition, a closed pump-controlled hydraulic cylinder compensation system can also be used. The inlet and outlet of the hydraulic pump of the closed pump-controlled hydraulic cylinder compensation system are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder. The speed or displacement of the hydraulic cylinder is controlled by the hydraulic cylinder, but because the two chambers of most hydraulic cylinders have different areas, an additional charge pump is required. The excess oil needs to be drained back to the tank

Method used

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  • Positive displacement heave compensation hydraulic system and heavy compensation lifting system
  • Positive displacement heave compensation hydraulic system and heavy compensation lifting system
  • Positive displacement heave compensation hydraulic system and heavy compensation lifting system

Examples

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no. 1 example

[0060] like figure 1 As shown in , the first embodiment of the present invention provides a volumetric active heave compensation hydraulic system, including a hydraulic cylinder 1, an oil tank 2, two sets of proportional pumps 3 and an electric motor 4, and the hydraulic cylinder 1 is equipped with a single piston inside The double-acting hydraulic cylinder includes a rod chamber 11 with a piston rod 14 inside and a rodless chamber 12 without a piston rod inside. The rod chamber 11 and the rodless chamber 12 are isolated from each other by a piston 13, and the rod chamber 11 and The pressure ports A and B of the rodless chamber 12 are respectively connected to the proportional pump 3 through the first oil passage 51 and the second oil passage 52, and are connected to the oil tank 2 via the proportional pump 3, wherein each group of proportional pumps 3 includes a first A proportional pump 31 and a second proportional pump 32, the first proportional pump 31 and the second propo...

no. 2 example

[0070] like figure 2 As shown in , the second embodiment of the present invention provides a volumetric active and passive heave compensation hydraulic system, including a hydraulic cylinder 1, an oil tank 2, two sets of proportional pumps 3 and an electric motor 4, and the hydraulic cylinder 1 is internally equipped with a single piston The double-acting hydraulic cylinder includes a rod chamber 11 with a piston rod 14 inside and a rodless chamber 12 without a piston rod inside. The rod chamber 11 and the rodless chamber 12 are isolated from each other by a piston 13, and the rod chamber 11 The pressure ports A and B of the rodless chamber 12 are respectively connected to the proportional pump 3 through the first oil passage 51 and the second oil passage 52, and are connected to the oil tank 2 through the proportional pump 3, wherein each group of proportional pumps 3 includes one The first proportional pump 31 and a second proportional pump 32, the first proportional pump 3...

no. 3 example

[0085] like image 3 As shown, the third embodiment of the present invention provides a heave compensation hoisting system, including a ship deck / cabin 010, a wave compensation winch system 011 arranged on the ship deck / cabin 010, and a wire rope 012 surrounding the wave compensation winch system 011 , the load 10 hoisted at the end of the wire rope 012 and the crane pulley block 014 carrying the steel wire rope 012, the wire rope 012 is stretched and steered along the crane pulley block 014, the heave compensation hoisting system of this embodiment also includes a volumetric heave compensation hydraulic system 013, One pulley 8 in the crane pulley block 014 is connected to the front end of the piston rod, so that the one pulley 8 can move with the reciprocating motion of the piston rod.

[0086] like figure 1 or figure 2 As shown, the volumetric heave compensation hydraulic system 013 includes a hydraulic cylinder 1, a fuel tank 2, a proportional pump 3 and an electric mot...

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Abstract

The invention relates to a positive displacement heave compensation hydraulic system which comprises a hydraulic cylinder, an oil tank, proportional pumps and a motor. The hydraulic cylinder is a double-acting type hydraulic cylinder internally provided with a single piston. The hydraulic cylinder comprises a rod cavity and a rodless cavity which are isolated from each other. The pressure port of the rod cavity and the pressure port of the rodless cavity are connected to the proportional pumps through a first oil way and a second oil way correspondingly and are connected to an oil tank through the proportional pumps. The proportional pumps are driven by the motor to run. One or more sets of proportional pumps are arranged. Each set of proportional pumps include the first proportional pump and the second proportional pump, wherein the first proportional pump and the second proportional pump are arranged on the first oil way and the second oil way correspondingly. The positive displacement heave compensation hydraulic system can meet both the requirement for large tonnage and the requirement for high efficiency, due to the fact that the rod cavity and the rodless cavity are connected with the oil tank through the proportional pumps correspondingly, the proportional pumps suck and discharge oil between the oil tank and the hydraulic cylinder, no extra oil supplementing pump needs to be additionally arranged for oil supplementing, the number of control elements can be reduced, the system efficiency of heavy compensation is improved, and the system flexibility is controlled.

Description

technical field [0001] The invention relates to the field of wave compensation hydraulics, in particular to a volumetric heave compensation hydraulic system and a heave compensation hoisting system applying the hydraulic system. Background technique [0002] Heave compensation is a kind of wave compensation, which refers to the compensation and correction in the vertical direction due to the fluctuation of the operating equipment caused by the fluctuation of the sea surface. Mainly used in offshore supply, offshore drilling, cabled submarine robot installation operations, deep-sea exploration, etc. Due to the influence of wave fluctuations, the crane load moves relative to the waves, and the load material may collide or increase the difficulty of offshore operations, thus affecting the safety of offshore operations. [0003] The current wave compensation includes active compensation form, passive compensation form or semi-active compensation form combining active and passiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B1/02B66C23/52
CPCF15B11/036B66C23/52B66D1/52F15B15/1466F15B2211/20546F15B2211/20561F15B2211/20576F15B2211/27F15B2211/30515F15B2211/3058F15B2211/31535F15B2211/6336F15B2211/7053F15B2211/7055F15B1/02
Inventor 胡中望宋豫
Owner SHANGHAI ZHENHUA HEAVY IND