• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (4): 222-231.doi: 10.3901/JME.2022.04.222

• 运载工程 • 上一篇    下一篇

扫码分享

惯性式波浪能供电浮标的液压能量转换系统设计研究

吴金明1, 陈妮2, 钱晨1   

  1. 1. 东南大学机械工程学院 南京 210089;
    2. 南京航空航天大学机电学院 南京 210016
  • 收稿日期:2021-03-16 修回日期:2021-09-28 出版日期:2022-02-20 发布日期:2022-04-30
  • 通讯作者: 陈妮(通信作者),女,1990年出生,博士,讲师。主要研究方向为能量转换和机械加工。E-mail:ni.chen@nuaa.edu.cn
  • 作者简介:吴金明,男,1988年出生,博士,讲师。主要研究方向为波浪能发电。E-mail:jinmingwu@seu.edu.cn;钱晨,男,1997年出生。主要研究方向为波浪能发电。E-mail:250108395@qq.com
  • 基金资助:
    国家自然科学基金(51905096)和江苏省基础研究计划(BK20190373,BK20180435)资助项目。

Research on Design Method of the Hydraulic Energy Conversion System of Inertial Wave-energy-powered Buoy

WU Jinming1, CHEN Ni2, QIAN Chen1   

  1. 1. School of Mechanical Engineering, Southeast University, Nanjing 210089;
    2. College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
  • Received:2021-03-16 Revised:2021-09-28 Online:2022-02-20 Published:2022-04-30

摘要: 浮标是海洋探测的重要工具,就地取能利用波浪能为浮标供电可以满足其对高电能供给的需求。针对惯性式波浪能供电浮标,研究其液压能量转换系统的设计方法。利用CUMMINS时域方程建立描述由浮标和内部惯性体组成的双体系统的非线性间断动力学模型,得到影响波浪能量捕获过程的主要因素如下:蓄能器的压强体积比Ka和综合液压马达排量、发电机负载电阻与特征系数的影响系数Kr。在液压蓄能器容积为无限大的假设前提下,得到悬挂弹簧的最优弹性系数。对液压系统参数的研究表明,Ka不影响捕获的波浪能功率以及蓄能器平均压强但影响蓄能器压强的波动幅度;捕获的波浪能功率为Kr的单峰函数,而峰值处对应着Kr的最优值;使蓄能器压强标准差系数达到规定阈值的最大Ka值即为Ka的最优值。

关键词: 浮标, 波浪能供电, 液压系统, 蓄能器, 设计方法

Abstract: Buoys are important tools for ocean exploration, and the use of wave energy to supply power to buoys can meet their high demand on electricity. Aiming at the inertial wave-energy-power-supply buoy, the design method of its hydraulic energy conversion system is studied. The Cummins’ time-domain equation is used to establish a nonlinear discontinuous dynamic model describing the two-body system composed of the buoy and the internal inertial body. It is found that, the main factors that affect energy capture are: the pressure-volume ratio of the accumulator Ka and a coefficient Kr that synthesizes the hydraulic motor displacement, generator load resistance and generator characteristic coefficient. Under the assumption of infinitely large volume of the hydraulic accumulator, the optimal stiffness of the suspension spring is obtained. The results show that Ka does not affect the captured wave energy power and the average pressure of the accumulator but affects the fluctuation range of the accumulator pressure; the captured wave energy power is a unimodal function of Kr, and the peak value corresponds to the optimal value of Kr. The maximum Ka that enables the accumulator pressure standard deviation coefficient to reach the specified threshold is the optimal value of Ka.

Key words: buoy, wave-energy powering, hydraulic system, accumulator, design method

中图分类号: