November 9-10, 2018, the award-winning doctors and tutors of the “8thShangyin Excellent Silver Doctoral Thesis Award” from 16colleges and universities gathered in Chengdu from all over the country to share their award-winning papers and scientific research results. The award ceremony received a grand award. Liu Jianbin,Ph.D. student of the Department of Mechanical and ElectronicEngineering, tutored byAcademicianYang Huayong and Professor Xie Haibo, “The new principle ofhydraulic-mechanical double feedback between stages and itsapplication in large flow control valves” won the 8th ShanghaiExcellent Silver Doctoral Thesis Silver award!
The“Shangyin Excellent Mechanical Doctoral Thesis Award” aims to improve the level of Chinese manufacturing technology, strengthen the cultivation of high-level creative talents, encourage the spirit of innovation, improve the quality of doctoral education in China's mechanical engineering and automation, and stimulate and encourage Chinese youth. The students are engaged in the research and development and creative application of mechanical engineering and automation, cultivating excellent mechanical engineering talents, enhancing the interaction between the business community and the academic community, and promoting the upgrading and innovation of the machinery industry technology. The Shangyin Youbo Award is the highest honor in the domestic doctoral thesis in mechanical engineering.
The award-winning paper focuses on the new interstage control method of multi-stage and large- flow control valves. It aims to promote the technological progress of the core components of domestic engineering machinery through independent innovation of basic components and break the monopoly of international brands on the domestic high-end hydraulic components market. Multi-stage flow valve implemented in various inter-level feedback mode to control the displacement of the pilot spool of the main spool, thereby completing the flow regulating valve through the main core, a greater level of flow control. Commoninter-stage feedback control methods are hydraulic feedback, mechanical feedback, hydraulic follow-up, and electric feedback. With the increasing demand for reliability, leakage, opening and closing dynamics and load adaptability of flow valves, the principle of multiple feedback between stages is explored, and the advantages of the above feedback methods are comprehensively utilized to overcome the reliability of a single feedback method. The limitations of spool displacement control accuracy or response speed are imperative for high-performance flow valve research. This paper focuses on the new principle and application of double feedback between flow valve stages. The topic has important academic research value and strong engineering application prospects.
Aiming at the bottleneck of the traditional inter-stage control method in improving the static and dynamic characteristics of the large flow control valve, the paper puts forward the new principle of inter-stage hydraulic -mechanical double feedback and the corresponding load control valve, and in the decoupling design method, large flow hydraulic power compensation and Three innovations were proposed to close the improvement of features, filling the domestic gap
The20- diameter prototype developed by the thesis was tested onZhonglian and Xugong Group truck cranes respectively, and the performances reached or exceeded the existing imported products of the same specifications. It passed the authoritative testing of theNational Construction Urban Construction Machinery QualitySupervision and Inspection Center and achieved initial industrialization in Zhonglian.
During the research period, he published 5 SCI papers, 1 EI paper, and 9invention patents. In March 2017, he won the 45th GenevaInternational Invention Exhibition Gold Award. The above scientific research results passed the expert appraisal organized by ChinaMachinery Industry Federation in March 2018.
ChairmanZhuo Yongcai and Academician Li Bacon of Shangyin Group presented awards to the authors and tutors of the silver award papers (LeftZhuo Yongcai, Right Li Bacon, Right Two Yang Huayong, Right Three LiuJianbin)
AcademicianGuo Dongming presented the trophy (right one Yang Huayong, right twoGuo Dongming, right three Liu Jianbin)
AcademicianYang Huayong delivered his speech of award-winning
Two tutors and the author