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学者姓名：尹方龙
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Abstract ：
Abstract Seawater hydraulic axial piston pump (SHAPP) is a critical power component in underwater operating systems. A parameterized elasto-hydrodynamic (EHD) lubrication model of the piston/cylinder tribopair in the SHAPP is originally established, which considers the elasto-hydrodynamic behavior, viscosity temperature effect and deep-sea environmental pressure. The deformation of piston bush, bearing mechanism and energy loss characteristics of the water film under different operating conditions are discussed. The results show that the deformation of piston bush made of polyetheretherketone (PEEK) is in micron-scale under water film and deep-sea pressure, which could increase the leakage and viscous friction power loss of piston/cylinder tribopair. In deep-sea environment, the leakage and viscous friction power loss calculated by EHD are always greater than those calculated by hydrodynamic (HD), and increase with the increase of working pressure, shaft speed, gap size, sea depth and piston bush thickness. Besides, the increase of sea surface temperature could increase the leakage and decrease the viscous friction power loss of the piston/cylinder tribopair, respectively. Finally, design instructions to optimize the piston/cylinder tribopair are presented, therefore the proposed methodology can be used as a designing tool for SHAPP. © 2020 Elsevier Ltd
Keyword ：
Seawater Seawater Fluid structure interaction Fluid structure interaction Elastohydrodynamic lubrication Elastohydrodynamic lubrication Oceanography Oceanography Reciprocating pumps Reciprocating pumps Deformation Deformation Friction Friction Surface waters Surface waters Hydrodynamics Hydrodynamics Pistons Pistons Energy dissipation Energy dissipation
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| GB/T 7714 | Nie, Songlin , Guo, Ming , Yin, Fanglong et al. Research on fluid-structure interaction for piston/cylinder tribopair of seawater hydraulic axial piston pump in deep-sea environment [J]. | Ocean Engineering , 2021 , 219 . |
| MLA | Nie, Songlin et al. "Research on fluid-structure interaction for piston/cylinder tribopair of seawater hydraulic axial piston pump in deep-sea environment" . | Ocean Engineering 219 (2021) . |
| APA | Nie, Songlin , Guo, Ming , Yin, Fanglong , Ji, Hui , Ma, Zhonghai , Hu, Zhen et al. Research on fluid-structure interaction for piston/cylinder tribopair of seawater hydraulic axial piston pump in deep-sea environment . | Ocean Engineering , 2021 , 219 . |
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Abstract ：
To realize the efficient sealing of piston pair within water hydraulic pumps and automatically compensate the wear gaps, an automatic compensation structure for piston pair gaps was proposed. The fluid-solid coupling simulation technology was used to study the deformation characteristics of piston bushs under the coupling of inner annular fluid and outer annular clearance fluid pressure with different piston bush thicknesses and ring groove widths. The simulation results show that, under the same working pressure, fluid boundary conditions and annular groove width, the deformation of piston bush gradually decreases with the increase of piston bush thickness. And the piston bush was made of engineering plastic PEEK. When the piston bush thickness is unchanged, the deformation of piston bush increases gradually with the increase of ring groove width. In addition, a test system for automatic clearance compensation of piston pair was established and preliminary tests were carried out. The experimental results are basically consistent with the simulation data. © 2020, China Mechanical Engineering Magazine Office. All right reserved.
Keyword ：
Rings (components) Rings (components) Plastics industry Plastics industry Pistons Pistons Deformation Deformation
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| GB/T 7714 | Nie, Songlin , Li, Shuo , Yin, Fanglong et al. Study on Fluid-Solid Coupling of Deformation Characteristics of Piston Bush in Water Hydraulic Pumps [J]. | China Mechanical Engineering , 2020 , 31 (10) : 1135-1141 . |
| MLA | Nie, Songlin et al. "Study on Fluid-Solid Coupling of Deformation Characteristics of Piston Bush in Water Hydraulic Pumps" . | China Mechanical Engineering 31 . 10 (2020) : 1135-1141 . |
| APA | Nie, Songlin , Li, Shuo , Yin, Fanglong , Zhou, Xin , Hu, Zhen . Study on Fluid-Solid Coupling of Deformation Characteristics of Piston Bush in Water Hydraulic Pumps . | China Mechanical Engineering , 2020 , 31 (10) , 1135-1141 . |
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Abstract ：
In order to meet the demand of large flow and fast response electro-hydraulic control system, a large flow and fast response on/off valve driven by a linear motor was developed. The basic principle was that, integrating the linear motor drive technology with the pilot valve structure closely, the pilot valve and main valve spool were direct driven respectively by a high power linear motor. Firstly, a model was established with AMESim simulation software for the hydraulic quick opening valve to optimize the key structural parameters and to get its static and dynamic characteristics. Then the motion plan was programmed with Matlab/Simulink software for both the position loop and the speed loop of the linear motor to control the movement state of the on/off valve pilot spool and the main spool, to achieve a precise digital control of the valve opening and improve the control accuracy of the fast response and large flow valve. Finally, a prototype of the on/off valve was developed, and the trajectory test of linear motor was carried out. The results show that the linear motor possesses a better following performance and can achieve the planned motion curve. The experiment and simulation results are basically consistent, which proves that the characteristics of the developed hydraulic valve can satisfy the need of large flow and fast response. © 2019, Editorial Department of Transaction of Beijing Institute of Technology. All right reserved.
Keyword ：
Reels Reels Digital control systems Digital control systems MATLAB MATLAB Linear motors Linear motors
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| GB/T 7714 | Zhang, Jing-Xiu , Nie, Song-Lin , Yin, Fang-Long et al. Design and Experimental Research of Water Hydraulic Large Flow and Fast Response On/Off Valve [J]. | Transaction of Beijing Institute of Technology , 2019 , 39 (5) : 466-472 . |
| MLA | Zhang, Jing-Xiu et al. "Design and Experimental Research of Water Hydraulic Large Flow and Fast Response On/Off Valve" . | Transaction of Beijing Institute of Technology 39 . 5 (2019) : 466-472 . |
| APA | Zhang, Jing-Xiu , Nie, Song-Lin , Yin, Fang-Long , Ji, Hui . Design and Experimental Research of Water Hydraulic Large Flow and Fast Response On/Off Valve . | Transaction of Beijing Institute of Technology , 2019 , 39 (5) , 466-472 . |
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Abstract ：
Hard-to-hard material combination have potential application to solve the abrasive wear problem in seawater hydraulic components. To select suitable material combination for key tribopairs in seawater hydraulic components, the tribological performance of TiCN-based cermet, Tungsten carbide (WC) with 6%wt of Co (YG6X) and WC with 6%wt of Ni (YN6X) against Si3N4 ceramic in seawater was experimentally investigated. The results show that the coefficients of friction and wear of the YN6X/Si3N4 tribopair were below those of other tribopairs. The Ni in YN6X could effectively reduce the corrosion effect of seawater. The ploughing effect caused by the peeling of the adhesion layer on the Si3N4 increased the rate of wear of TiCN. And the corrosive impact of the seawater exacerbated the ploughing effect, resulting in heavy wear of the YG6X. Therefore, a YN6X/Si3N4 tribopair with excellent wear resistance has the potential to prohibit abrasive wear caused by seawater. The research can provide the experimental evidence for materials screening of key tribopairs in seawater hydraulic components.
Keyword ：
tribological performance tribological performance cermet cermet silicon nitride silicon nitride seawater lubrication seawater lubrication
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| GB/T 7714 | Nie, Songlin , Xu, Wenhui , Yin, Fanglong et al. Investigation of the tribological behaviour of cermets sliding against Si3N4 for seawater hydraulic components applications [J]. | SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES , 2019 , 7 (4) . |
| MLA | Nie, Songlin et al. "Investigation of the tribological behaviour of cermets sliding against Si3N4 for seawater hydraulic components applications" . | SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES 7 . 4 (2019) . |
| APA | Nie, Songlin , Xu, Wenhui , Yin, Fanglong , Ji, Hui , Xu, Yujian , Hu, Zhen et al. Investigation of the tribological behaviour of cermets sliding against Si3N4 for seawater hydraulic components applications . | SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES , 2019 , 7 (4) . |
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