随机低转速驱动的数字配流径向柱塞恒流量泵的关键问题研究

Facing the high effective transforming of wind energy or ocean energy and the stable control of rotation rate of hydraulic motor used for driving electric generator in hydraulic wind power generation system or ocean power generation system and the fact that hydraulic pumps are usually driven at random low speed, a new concept of radial piston constant flow pump with digital distribution under random low speed driving and the key questions about design of this new type of hydraulic pump are put forward, and researches of the theory, the method and the technology of solving the key questions about design of this new type hydraulic pump are carried. The aim of researches is to forming the design theory and method of radial piston constant flow pump with digital distribution under random low speed driving, which will provide rational for developing this specific hydraulic pump and new type of hydraulic wind power generation system or ocean power generation system. The main researches are as follows: With the help of theory analysis and simulation, the mechanism and the control algorithm of digital distribution will be explored for radial piston pump under random low speed driving and the digital distribution will be designed based on high speed On/Off solenoid valves. And then, the innovative structure of radial piston pump under random low speed driving will be designed and analyzed for obtaining a good self-sucking capability, which is based upon the virtual prototype technique and simulation analysis of Fluent software. Moreover, by using associated simulation of Matlab and AMESim software, the method for gaining the constant output flow-rate characteristic will be probed when radial piston pump is driven under random low speed. Final, the prototype of radial piston constant flow pump with digital distribution under random low speed driving will be made and experimental researches of constant output flow-rate characteristic will be accomplished.

针对液压风力/海洋能发电系统中风能/海洋能的高效转换和驱动发电机的液压马达的稳速控制，以及所用液压泵通常处于随机低转速驱动的事实，提出随机低转速驱动的数字配流径向柱塞恒流量泵的新概念和设计该新型液压泵所面临的关键问题，开展解决关键问题的相应理论、方法和技术的研究，形成随机低转速驱动的数字配流径向柱塞恒流量泵的设计理论与方法，为今后开发此种特殊功用的液压泵和新型液压风力/海洋能发电系统提供依据。主要研究内容：借助于理论分析与仿真，探究径向柱塞液压泵在随机低转速下实现数字配流功能的机理与控制算法，并设计出基于高速电磁开关阀组的数字配流机构；基于虚拟样机技术和Fluent软件的仿真分析，进行径向柱塞液压泵在随机低转速下具有强自吸性能的创新结构设计与分析；运用Matlab与AMESim的联合仿真，探索径向柱塞液压泵在随机低转速下具有恒流量输出特性的实现方法；完成样机的制作及恒流量特性的实验研究。

针对液压风力/海洋能发电系统中风能/海洋能的高效转换和驱动发电机的液压马达的稳速控制，以及所用液压泵通常处于随机低转速驱动的事实，提出随机低转速驱动的数字配流径向柱塞恒流量泵的新概念和设计该新型液压泵所面临的关键问题，开展解决关键问题的相应理论、方法和技术的研究，形成随机低转速驱动的数字配流径向柱塞恒流量泵的设计理论与方法。主要研究内容：借助于理论分析与仿真，探究了径向柱塞液压泵在随机低转速下实现数字配流功能的机理与控制算法，并设计出了基于高速电磁开关阀组的数字配流机构；基于虚拟样机技术和Fluent 软件的仿真分析，进行了径向柱塞液压泵在随机低转速下具有强自吸性能的创新结构设计与分析；运用Matlab 与AMESim 的联合仿真，探索了径向柱塞液压泵在随机低转速下具有恒流量输出特性的几种控制方法；完成了三种样机的制作及恒流量特性的基本实验研究。所取得的重要结果是：1）设计了两款数字配流径向柱塞液压泵并完成了其中一种样机的制作，达到了规定的设计参数，并还设计和制作了一种数字配流轴向柱塞泵及其实验台，完成了相应的实验研究；2）实验证明，所提出的恒流量控制方法可以保证所开发的数字配流泵在随机低转速输入下的输出流量的误差不大于10%，符合项目要求；3）项目期间，资助发表的国际会议论文4篇（1篇被SCI/EI检索）及中文核心期刊论文2篇，中文核心期刊已经录用论文1篇，另有1篇论文投稿到外文SCI期刊（Journal of Dynamic Systems, Measurement and Control of ASME），目前正在修稿中；4）项目期间，申请国家发明专利2项，2017年已经获得国家发明专利授权1项（专利号：ZL 2015 1 0992867.4）；5）项目期间，培养博士研究生1名，培养硕士研究生2名，另外，培养本科生1名。通过本项目的研究，形成了随机低转速驱动的数字配流径（轴）向柱塞恒流量泵的完整设计理论，为今后实际开发随机低转速驱动的数字配流径（轴）向柱塞恒流量泵提供了理论与实验依据。