Semi-active heave compensation system based on combined two-stage hydraulic cylinder
A technology of heave compensation and compensation system, applied in the marine field, can solve the problems of compensation failure, energy consumption, compensation time should not be too long, etc., to achieve the effect of safe release
Pending Publication Date: 2018-11-16
SHANDONG UNIV
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Problems solved by technology
Therefore, the use of active heave compensation system came into being. Its main feature is that it needs to add active power, driven by electric energy or hydraulic energy. Now there are winch type and hydraulic cylinder type, which are used to compensate the deep movement of the offshore platform, so that the water The lower robot maintains a stable working point or a stable motion state. The advantages are high compensation accuracy, stronger ability to resist external interference, and stronger compensation ability. The disadvantage is that the system is complex. The energy consumption is greater, and the compensation time should not be too long
[0005] Most of the existing active and passive integrated deep heave compensation systems connect the passive compensation system and the active heave compensation system in series through simple series connection. Its compensation system is more bulky and redundant, and the selection of heave compensation is not accurate enough, which will cause more energy consumption or compensation failure
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Embodiment 2
[0032] Such as figure 2 As shown in , the difference between this embodiment and Embodiment 1 is that: the oil passage connecting the first oil port of the three-position four-way valve 18 and the oil port of the rod chamber of the active cylinder 3 is connected with the three-position four-way valve 18 Two back pressure valves 22 are connected in reverse parallel between the second oil port of the active cylinder 3 and the oil circuit of the rod chamber oil port, and the two back pressure valves 22 form a differential circuit, which can keep the oil circuit stable and reduce hydraulic shock , an unloading valve 23 connected with the oil tank 20 is respectively provided on the oil circuit of each back pressure valve 22 .
[0033] On the pipeline between the variable pump 19 and the oil tank 20, on the pipeline between the fourth oil port of the three-position four-way valve 18 and the oil tank 20, an oil return filter 24 is respectively arranged, and the oil outlet of the var...
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The invention discloses a semi-active heave compensation system based on a combined two-stage hydraulic cylinder. The semi-active heave compensation system comprises a load hanging system, an active compensation system and a passive compensation system which are mounted on a marine operation platform. The passive compensation system comprises a passive cylinder and an energy accumulation unit connected with a rod-free cavity oil port of the passive cylinder. The active compensation system comprises an active cylinder, a hydraulic circuit system, a detection unit and a controller, wherein the hydraulic circuit system is connected with a rod cavity oil port and a rod-free cavity oil port of the active cylinder. The semi-active heave compensation system based on the combined two-stage hydraulic cylinder has the advantages that flexible switching between or concurrent processing of active compensation and passive compensation can be realized, interference resistance of the heave compensation system is enhanced, the system compensation stroke is long, the semi-active heave compensation system has a broad application prospect in heave compensation of the field of deep-sea operation in aterrible ocean environment, and an optimal option is provided for deep-sea underwater operations of underwater robots.
Description
Technical field: [0001] The invention belongs to the marine technical field of deep-sea detection and operation technology, and in particular relates to a semi-active heave compensation system based on a composite secondary hydraulic cylinder applied to a cabled underwater robot for deep-sea operations. Background technique: [0002] Today's world is a world of oceans. With the increasing frequency of ocean exploration, my country has more and more ocean operations such as deep sea exploration. However, offshore operations are affected by harsh environments such as wind, waves, currents, and tides. Sway, roll, yaw, surge, sway, heave and their coupling motions, among which the movement in the heave direction has the most significant impact on marine safety operations. [0003] When carrying out deep-sea operations on the offshore platform, the cabled underwater robot is connected to the repeater through the cable, and the repeater is connected to the sea surface operation pla...
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IPC IPC(8): B63B39/03B63G8/24
CPCB63B39/03B63G8/24
Inventor 刘延俊李世振于辉颜飞
Owner SHANDONG UNIV