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Enhanced performance study of energy capture ball valve integrated with a new type of torsional impeller

Energy 2025年 330卷

作者： Jinmin Xiong Guangchao Zhang Yudong Xie Shinong Wang Mupeng Bao Yong Wang School of Mechanical Engineering Shandong University Jinan 250061 China Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University) Ministry of Education Jinan 250061 China State Key Laboratory of Advanced Equipment and Technology for Metal Forming Shandong University Jinan 250061 China

In this study, a new impeller with a torsion angle between the middle section and the end face of the blade is proposed, so as to improve the energy capture performance of the energy capture ball valve (integrated impeller in valve), and to be more compatible with the flow regulation performance of the valve. Under the condition of large pipe diameter, the flow regulation and energy capture characteristics of the valve with ordinary impeller and torsional impeller are compared, and the influence mechanism of the torsion angle structure on the performance of the valve is studied. The research shows that the torsional impeller improves the pressure difference between the concave and convex surfaces of the blade, reduces the magnitude and frequency of negative moments during the rotational cycle, and also changes the strength of the vortex at the concave surface of the impeller's driving blade, thereby improving the energy capture efficiency and fluid regulation capacity of the valve. When the blade arc angle is 180°, the valve with 90° torsion angle improves 26.25 % of the output shaft power, 6.8 % of the flow coefficient and 44.3 % of the energy capture efficiency compared with the ordinary impeller ball valve.

关键词： Ball valve Blade arc angle Energy capture Flow regulation Hydraulic turbine Torsion angle

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Kinematic Characteristics and Dynamics Analysis of a Double-ring Truss Deployable Antenna Mechanism

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Binggong Xuebao/Acta Armamentarii 2020年第4期41卷 810-821页

作者： Han, Bo Xu, Yundou Yao, Jiantao Zheng, Dong Li, Yongjie Zhao, Yongsheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University QinhuangdaoHebei066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University QinhuangdaoHebei066004 China

A double-ring truss deployable antenna mechanism, which is used as the support and deployment mechanism for large-diameter space-borne antenna, is proposed to improve the stiffness of the single-ring truss deployable antenna with large diameter. The structural decomposition of double-ring truss deployable antenna mechanism is conducted, the screw constraint topology graph of the closed-loop deployable mechanism unit is drawn, and the degree of freedom (DOF) of the mechanism is analyzed. The analyzed result shows that the double-ring truss deployable mechanism has only one DOF. The screw velocity of each component in the mechanism is analyzed based on screw theory, the angular velocity and centroid linear velocity of each component are obtained through vector operation, and the Jacobian matrixes are also obtained. Furthermore, the screw accelerations of the components in the mechanism are derived based on the screw derivative, and the angular acceleration and centroid linear acceleration of each component in the double-ring truss mechanism are obtained. A dynamic model of the double-ring truss mechanism is established based on Newton-Euler equation and virtual work principle, and the numerical calculation and simulation verification are carried out. The research results show that the theoretical analysis is correct. The proposed double-ring truss deployable antenna mechanism has a simple structure, and can be smoothly deployed with only one input drive, the kinematic and dynamic analysis method based on screw theory used in this paper has a clear physical meaning, the analysis process is relatively stylized and is easy to program. © 2020, Editorial Board of Acta Armamentarii. All right reserved.

关键词： Screws

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Assessing the magnetic order dependent γ-surface of Cr-Co-Ni alloys

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Journal of Materials Science & technology 2021年第21期80卷 66-74页

作者： Zhibiao Yang Song Lu Yanzhong Tian Zijian Gu Huahai Mao Jian Sun Levente Vitos Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Applied Materials Physics Department of Materials Science and EngineeringRoyal Institute of TechnologyStockholm SE-10044Sweden Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Unit of Structures Department of Materials Science and EngineeringKTHSE-10044StockholmSweden Thermo-Calc Software Råsundav.18SE-16767SolnaSweden Division of Materials Theory Department of Physics and Materials ScienceUppsala UniversityP.O.Box 516Uppsala SE-75120Sweden Research Institute for Solid State Physics and Optics Wigner Research Center for PhysicsBudapest H-1525P.O.Box 49Hungary

In order to efficiently explore the nearly infinite composition space in multicomponent solid solution alloys for reaching higher mechanical performance,it is important to establish predictive design strategies using computation-aided ***,using ab initio calculations we systematically study the effects of magnetism and chemical composition on the generalized stacking fault energy surface(γ-surface) of Cr-Co-Ni medium entropy alloys and show that both chemistry and the coupled magnetic state strongly affect the γ-surface,consequently,the primary deformation *** relations among various stable and unstable stacking fault energies are revealed and *** present findings are useful for studying the deformation behaviors of Cr-Co-Ni alloys and facilitate a density functional theory based design of transformation-induced plasticity and twinning-induced plasticity mechanisms in Cr-Co-Ni alloys.

关键词： Cr-Co-Ni alloys Stacking fault energy Transformation-induced plasticity Twinning-induced plasticity Ab initio

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Corrigendum to “Enhancing the fracture toughness of aerospace-grade carbon fibre/epoxy composites by interlaying surface-activated low-melt polyaryletherketone (LMPAEK) meshes” [Composites Part B 287 (2024) 111824]

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Composites Part B: Engineering 2025年

作者： Dong Quan Xuemin Wang Jiaying Pan Yannan Ma Gennaro Scarselli Guoqun Zhao State Key Laboratory of Advanced Equipment and Technology for Metal Forming Shandong University Jinan Shandong 250061 China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) Shandong University Jinan Shandong 250061 China Department of Innovation Engineering University of Salento Italy

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forming mechanism and regulation of microstructural evolution for stainless steel tube with annular inner ribs by the method of hot power spinning

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International Journal of Material forming 2025年第2期18卷

作者： Zhang, Peng Zhao, Chen-Hao Wu, Tian-Feng Han, Jian-Chao College of Materials Science and Engineering Taiyuan University of Technology Taiyuan030024 China College of Mechanical Engineering Taiyuan University of Technology Taiyuan030024 China National Key Laboratory of Metal Forming Technology and Heavy Equipment Taiyuan University of Technology Taiyuan030024 China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment of Ministry of Education Taiyuan University of Technology Taiyuan030024 China

Thin-walled 304 stainless steel tubes with annular inner ribs have high strength, high stiffness, and light-weighting characteristics, and have wide applications in the aviation, aerospace, and navigation fields. In this study, stainless steel thin-walled tubes with inner ribs were manufactured by hot power backward-spinning. The microstructural morphology, microhardness, and main texture evolution of typical regions of the tube were characterized and tested. The influence of different stress-loading conditions on the microstructure and mechanical properties of the tube was mainly studied. The numerical simulation for the hot spinning forming process of 304 stainless steel was carried out to analyze the material flow rules in the regions of inner rib and wall-thinning, as well as predict the height of inner ribs with different spinning parameters. The results showed that the thinning of the wall of the tube region is obvious, and the material in the inner rib region fills into the groove of the mandrel, and the loading paths of stress on the materials in these regions are different, and the wall-thinning region is subjected to axial and radial loads accuring plane strain, which leads to the transformation from the original equiaxial crystalline to elongated grains. The microstructure of the sample presented strong //AD texture for the reason of acutely axial load born from rotating tools during spinning. This study provides a reliable theoretical basis and technical reference for the optimization of the spinning forming process of stainless steel thin-walled tubes with annular inner ribs. © The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature 2025.

关键词： Metal spinning

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Effects of strain paths on the fracture forming limit of high strength structural steel sheets

Effects of strain paths on the fracture forming limit of hig...

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2020 International Conference on Internet of Things, Artificial Intelligence and Mechanical Automation, IoTAIMA 2020

作者： Xu, Teng Xia, Qin-Xiang Qi, Zhen-Jie Wu, Xiao-Yu Ran, Jia-Qi Gong, Feng Guangdong Provincial Key Laboratory of Micro Nano Optomechatronics Engineering College of Mechatronics and Control Engineering Shenzhen University China Guangdong Provincial Key Laboratory of Precision Equipment and Manufacturing Technology School of Mechanical and Automotive Engineering South China University of Technology China Shenzhen Key Laboratory of Advanced Manufacturing Technology for MouldandDie College of Mechatronics and Control Engineering Shenzhen University China National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials China

The cruciform two-axial tensile specimen was designed and the two-axial tensile test scheme for different strain paths was developed. The effect of strain paths on the forming limit of high strength structural steel plates was obtained by the DIC method. The results show that for the unidirectional alternating loading test scheme, the equivalent strain of the ultimate strain is less than the sum of the equivalent strains from each step. When the main strain direction of the specimen pre-strain is perpendicular to the final strain path, the forming limit decreases with the increase of the pre-strain. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Strain

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Optimization in strength-ductility of soft plate rolled AZ31 magnesium alloy via CDRX and shear band-induced DRX

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Journal of Alloys and Compounds 2025年 1033卷

作者： Mu Zi Cao Feng Li Jia Yang Zhang Zi Yi Wang School of Materials Science and Chemical Engineering Harbin University of Science and Technology Harbin 150040 PR China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Harbin 150080 PR China Heilongjiang Provincial Key Laboratory of Light Metal Materials Modification & Green Forming Technology Harbin University of Science and Technology Harbin 150040 PR China

The enduring issue of "strength-ductility inversion" associated with conventional processing techniques poses a considerable challenge that limits the broader application of magnesium alloy components. This research introduces a novel soft plate rolling process (SPR) aimed at achieving synergistic control over the microstructural evolution and mechanical properties of AZ31 magnesium alloy sheets. Microstructural analysis indicates that the heterogeneous shear stresses generated by the SPR process facilitate shear band-induced dynamic recrystallization (SB-DRX), resulting in a heterostructure that features both fine-grained (FG) and coarse-grained (CG) regions. The average grain size achieved through the SPR process (2.74 µm) is less than one-third of that produced by conventional methods. Additionally, the dislocation density within the shear band zones is reduced to half that of CG areas. The combined effects of grain refinement and dislocation strengthening contribute to a significant enhancement in yield strength (YS) and ultimate tensile strength (UTS). Moreover, the randomization of crystallographic orientations in the recrystallized grains leads to a reduction in the intensity of the basal texture (from 13.62 to 8.86), thereby activating non-basal slip systems and significantly enhancing plastic deformability. The SPR process provides dual advantages of high-efficiency forming and defect mitigation. methodology holds substantial importance for the development of innovative technologies, as well as for industrial-scale applications and the widespread adoption of high-performance magnesium alloy sheets in manufacturing processes.

关键词： Magnesium alloy Mechanical properties Recrystallization Shear bands Soft plate rolling

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Type Synthesis of 3-Translational Redundant Actuated Parallel Mechanisms With Closed-Loop Branch Chains Based On Graphical Approach

Research Square

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Research Square 2021年

作者： Li, Yong-Quan Jiang, Hong-Sheng Zheng, Tian-Yu Xi, Ke-Long Jing, Han Zhang, Li-Jie Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Ministry of Education of China Yanshan University Qinhuangdao066004 China Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao066004 China

The 3-translational parallel mechanism is widely used in industrial, medical, and military fields, among others. With the development of the national logistics industry, a pressing need for a kind of 3-translational parallel mechanism emerged. Such mechanisms have high stiffness and high bearing capacity and are used for cargo handling and sorting. A novel method based on the graphical approach was proposed for the synthesis of 3-translational redundancy actuated parallel mechanism with closed-loop branch chains. The new mechanism has four symmetrically arranged branch chains, which eases subsequent kinematics and dynamics analyses while providing good mechanical properties. Based on the graphical approach theory, according to the constraint number contained in the branch chain, two types of redundant driven branch chains with closed-loop structures were constructed. The first type includes rotation constraint in one direction, while the second type includes the rotation constraint in two directions. Based on various combinations of two branch chain types, their allocation schemes can be divided into two types. Moreover, said these two allocation schemes can be integrated into at least 500 and 400 types of 3-translational redundant actuated parallel mechanisms with closed-loop branch chains. Then, the degree of freedom properties of representative mechanisms were tested using the screw theory. A large number of novel mechanisms were integrated assessed using this method, and branch chains such mechanisms were symmetrically distributed. They have a strong bearing capacity, simple calculation, and control, and can be applied to the handling and sorting of goods, large-scale precision machine tools, and large construction machinery vibration isolation systems, among others. © 2021, CC BY.

关键词： Redundancy

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Design and Analysis of a New 5-DOF Hybrid Serial-Parallel Manipulator

Design and Analysis of a New 5-DOF Hybrid Serial-Parallel Ma...

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作者： Xu, Yundou Xu, Zhenghe Yang, Fan Mei, Youen Yue, Yi Zhou, Yulin Yao, Jiantao Zhao, Yongsheng Laboratory of Parallel Robot and Mechatronic System of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Qinhuangdao066004 China Shanghai Aerospace Equipment Manufacture Company Limited Shanghai201100 China School of Mechanical Engineering Yanshan University Qinhuangdao066004 China

In this paper, a 2R1T (two rotations and one translation) over-constrained parallel mechanism R(2RPR)R/SP with two ordered continuous rotational axes is proposed, which contains fewer joints, by concatenating a 2-degree-of-freedom (DOF) RR tilting head with orientation-adjusting capability, a novel 5-DOF hybrid manipulator is constructed. On this basis, optimize the sizes with the best performance of the motion/force transmissibility as the optimization target, and the design dimensions that meet the requirements of the workspace are obtained and the structural design is carried out. The static stiffness of the manipulator are analyzed, and the analysis results are verified by simulation and compared with the products that have been successfully applied in foreign countries. An iterative searching method is used to determine the workspace of the manipulator, and evaluate whether the workspace of the hybrid manipulator meets the requirements. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Manipulators

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Reactive hot-pressing of ultrafine dual phase high-entropy (Ti,Zr,Hf,Nb,Ta)C-SiC ceramics with enhanced mechanical properties

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Ceramics International 2025年

作者： Ruiqing Zhao Boxin Wei Liwei Wang Jia Yao Lei Chen Yujin Wang School of Materials Science and Chemical Engineering Harbin University of Science and Technology Harbin 150040 China Heilongjiang Provincial Key Laboratory of Light Metal Materials Modification and Green Forming Technology Harbin University of Science and Technology Harbin 150040 China National Key Laboratory of Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China Institute for Advanced Ceramics School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology Harbin Institute of Technology Harbin 150001 China

Ultrafine (submicron-scale) dual-phase high-entropy (Ti,Zr,Hf,Nb,Ta)C-SiC ceramics were successfully synthesized at significantly reduced temperatures (1500 – 1700 °C) through in-situ reactive hot-pressing of nanoscale high-entropy carbide and silicon powders. The densification process benefits from two synergistic mechanisms: carbon vacancy generation during in-situ reactions that enhances atomic diffusion, and a reactive sintering pathway facilitated by silicon-carbide interaction, which substantially lowers the densification temperature threshold. This low-temperature processing effectively suppresses grain coarsening while enabling in-situ formation of SiC that further constrain carbide phase growth through pinning. The resultant microstructure refinement (average grain size ∼200 nm), combined with full densification and SiC phase reinforcement, yields exceptional mechanical performance. Specifically, the (Ti,Zr,Hf,Nb,Ta)C-10 mol% Si composite sintered at 1700 °C demonstrates outstanding properties: flexural strength of 529 ± 17 MPa, fracture toughness of 5.2 ± 0.4 MPa m 1/2 , and Vickers hardness of 24.4 ± 0.7 GPa. These values either match or surpass those reported for most (Ti,Zr,Hf,Nb,Ta)C-based ceramic systems.

关键词： Vickers hardness

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