波浪能多腔油缸液压转换系统设计与研究

Design and Research of Hydraulic Conversion System for Wave Energy Multi-chamber Cylinder

以振荡扑翼波浪能发电装置的液压转换系统为研究对象,设计一种含有多腔油缸的液压转换系统,将波浪能转换为可利用的机械能。以波浪能高效采集和液压转换系统稳定输出为原则,设计一种多腔油缸并确定液压转换系统的组成及各元件的具体参数。针对不同海况,通过改变电磁阀换挡策略,实现对波浪能的采集,调节蓄能器的个数和预充压力使液压系统高、低管路的压力保持稳定,通过液压马达能够稳定输出机械能。运用AMESim仿真平台搭建采集机构和液压转换系统模型,模拟3级、4级和5级海况下采集机构的运动响应作为系统输入,分析液压转换系统的有效性、输出稳定性和转换效率。仿真结果验证,所设计的液压转换系统通过改变电磁阀换挡策略,能够实现对波浪能的高效采集,并有效提高液压转换系统的稳定性和转换效率。为振荡扑翼波浪能发电装置的液压转换系统的开发与研究奠定了理论基础。

Taking the hydraulic conversion system of the oscillating flapping-wing wave energy power generation device as the research object, a hydraulic conversion system containing multi-cavity oil cylinders is designed to convert wave energy into usable mechanical energy. Based on the principle of high-efficiency collection of random waves and stable output of the hydraulic conversion system, a multi-cavity oil cylinder is designed and the composition of the hydraulic conversion system and the specific parameters of each component are determined. According to different sea conditions, by changing the electromagnetic valve shift strategy to realize the collection of random waves, the number of accumulators and the pre-charge pressure are designed and adjusted to keep the pressure of the high and low pipelines of the hydraulic system stable, and the hydraulic motor can stably output mechanical energy. Based on the bond graph modeling theory of multi energy domain, the AMESim simulation platform is used to build the model of acquisition mechanism and hydraulic conversion system. The motion response of acquisition mechanism under three-level, four level and five level sea conditions is simulated as the system input. The effectiveness, output stability and conversion efficiency of hydraulic conversion system are simulated and analyzed. The results show that the designed hydraulic conversion system can effectively collect random waves by changing the electromagnetic valve shift strategy, and effectively improve the stability and conversion efficiency of the hydraulic conversion system. The results lay a theoretical foundation for the development and research of hydraulic conversion system of oscillating flapping wing wave power generation device.