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Direct pump control type electro-hydraulic heaving compensation device

A technology of heave compensation and pump control, applied in fluid pressure actuating devices, servo meter circuits, transportation and packaging, etc., can solve the problems of complicated pipeline connections, low system efficiency, and large volume, and achieve a simple system and reduce Device volume, no throttling loss effect

Inactive Publication Date: 2016-03-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The existing active linear compensation technology adopts a valve-controlled open circuit in its hydraulic system, which needs to be equipped with a hydraulic oil source and a hydraulic valve group to work. Not only is it bulky, the pipeline connection is complicated, and there are many components, but also due to throttling loss, The whole system is very inefficient

Method used

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  • Direct pump control type electro-hydraulic heaving compensation device
  • Direct pump control type electro-hydraulic heaving compensation device

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the present invention includes a control computer 1, a servo motor driver 2, a servo motor 3, a two-way hydraulic pump 4, an accumulator 5, a quick-plug joint 6, two overflow valves 7, a single rod hydraulic cylinder 8, and a movable pulley 9 , static pulley 10, three pressure sensors 11, speed sensor 12 and built-in displacement sensor 13.

[0024] The servo motor 3 driven by the servo motor driver 2 drives the two-way hydraulic pump 4 to rotate. The two output ends of the two-way hydraulic pump 4 are respectively connected to the rod chamber and the rodless chamber of the single-rod hydraulic cylinder 8 through the hydraulic pipeline 14. Two reversely installed overflow valves 7 are connected in parallel between the two output ends of the hydraulic pump 4; the accumulator 5 is divided into three circuits, the first c...

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PUM

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Abstract

The invention discloses a direct pump control type electro-hydraulic heaving compensation device. A servo motor drives a bi-directional hydraulic pump to rotate; two output ends of the bi-directional hydraulic pump are respectively connected with a rod cavity and a rodless cavity of a single-rod hydraulic cylinder; two overflow valves which are reversely mounted are also connected between the two output ends in parallel; an energy accumulator is connected with a quick connector on the rod cavity side of the single-rod hydraulic cylinder and is also connected with a first pressure sensor; two output ends of the bi-directional hydraulic pump are respectively connected with a second pressure sensor and a third pressure sensor; a rotating speed sensor is connected to the servo motor; all sensors and a servo motor driver are respectively connected with a control computer; a movable pulley is connected to a piston rod of the single-rod hydraulic cylinder; a fixed pulley is connected to the bottom of the single-rod hydraulic cylinder; and a built-in displacement sensor is mounted inside the single-rod hydraulic cylinder. The direct pump control type electro-hydraulic heaving compensation device has the advantages that an autonomous device is formed by a direct pump control differential cylinder closed type circuit; the servo motor, a hydraulic element and the sensors are integrated; closed loop control is carried out by the control computer; and throttling loss is avoided.

Description

technical field [0001] The invention relates to a crane heave compensation control system, in particular to a direct pump-controlled electro-hydraulic heave compensation device. technical background [0002] Since the 21st century, the world's demand for energy has increased day by day, and the ocean has become the focus of the energy strategies of various countries in the new century. Countries all over the world have increased their efforts in ocean development. With the massive development of offshore oil, large-scale offshore projects are also booming, and offshore cranes are one of the key equipment in these projects. [0003] The heave and swing of the hull caused by the wave movement greatly limits the operating capacity of the offshore crane. It will cause equipment damage and personal injury or death. The biggest technical difference between offshore cranes and ground cranes is to eliminate the impact of wave motion on crane operations. [0004] The existing well...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/48B66C13/16B66C23/52F15B1/02F15B11/08F15B13/04F15B21/02
CPCB66C13/48B66C13/16B66C23/52B66C2700/085F15B1/02F15B11/08F15B13/04F15B21/02F15B2211/6656F15B2211/7052
Inventor 龚国芳张亚坤王鹤汪慧杨华勇
Owner ZHEJIANG UNIV
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