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| Design of swing device for crown-block heave compensation system |
| ZHANG Yan-ting1,2, QU Ying-feng1, LIU Zhen-dong1, MA Jiang-tao1 |
1. College of Mechanical and Electrical Engineering, China University of Petroleum, Qingdao 266555, China;
2. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China |
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Abstract A swing device mathematical model was established by the Simulink software system in order to determine the structure parameters of crown-block heave compensation device’s key components. The crown-block, compensating cylinder and rocker arm device were simulated dynamically. The interrelation between the inclined angle of wire line, the force on the crown-block affected by wire line and the crown-block displacement was analyzed. The relationship between the angle of two rocker arm and the force state of compensating cylinder was also investigated. The study shows that the structure parameters, such as the length of the rocker arm device, the fixed hinge point position of the rocker arm device and so on, have large effects on the crown-block’s motion rule, force state and compensating property. The force of compensating cylinder first decreases and then increases along with the angle of two rocker arm increases when the crown-block moves from the lowest position to highest position. The length of the rocker arm device was calculated, and the fixed hinge point position of the rocker arm device and the fixed hinge point position of the compensating cylinder were determined.
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Published: 01 December 2012
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天车升沉补偿系统摇摆装置的设计
为了确定天车升沉补偿系统关键部件摇摆装置的结构参数,基于Simulink软件系统,建立摇摆装置的数学模型,对天车、补偿缸和摇臂装置进行了系统动力学数值模拟,分析了摇摆装置钢丝绳倾角、钢丝绳对天车作用力与天车位移之间的相互关系,以及摇臂装置2个摇臂夹角与补偿缸受力状态的关系.研究表明:摇摆装置的摇臂长度、摇臂下臂固定铰链点位置等结构参数对天车的运动规律、受力状态和补偿性能具有较大影响,天车从最低临界位置向最高临界位置运动的过程中,补偿缸受力随两摇臂夹角的增大先减小后增大.计算得到了摇摆装置各摇臂的长度,确定了摇臂下臂固定铰链点的位置参数和补偿缸固定铰链点的位置参数.
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