Article
Materials Science, Multidisciplinary
Lifu Cheng, Xinyuan Chen, Guoqian Wei
Summary: This study compares the fatigue properties of components made of composite materials and high-strength structural steel materials, and finds that composite materials can replace traditional steel materials in the production of mechanical structural components. The study focuses on a low-speed, high-torque radial piston motor mounted on a roadheader. The results show that the motor cylinder made of composite material has a similar safety factor to that made of high-strength structural steel, but is much lighter in weight.
Review
Engineering, Aerospace
Jiang'ao Zhao, Yongling Fu, Jiming Ma, Jian Fu, Qun Chao, Yan Wang
Summary: Axial piston pumps are widely used in aircraft hydraulic systems, requiring high power density, safety, and reliability. This study comprehensively reviews the latest literature on the cylinder block/valve plate interface, including theoretical models, experimental studies, and structural optimization methods.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Energy & Fuels
Xiangyang Li, Yiting Xi, Dunhui Xiao, Jiaxin Tao
Summary: This paper designed and optimized a bidirectional three-port valve plate structure to solve the flow rate and pressure matching problem in the aerospace pump-controlled differential hydraulic cylinder. The numerical results show that adjusting the angle of the non-dead point transition zone can balance pressure overshoot and flow pulsation, leading to an optimal valve plate structure.
Article
Engineering, Mechanical
Jiahai Huang, Zhenhua Dou, Zhenglei Wang, Long Quan, Linkai Niu
Summary: This study evaluated the tribological properties of commonly used materials for cylinder block/valve plate in axial piston pumps. The experiments found that different materials, heat treatment, and contact pressure can affect the friction and wear properties. The research provides valuable insights for the failure analysis and optimization design of valve plates/cylinder blocks in real axial piston pumps.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Zhaoqiang Wang, Lingtao Sun, Bo Han, Xiaoqiang Wang, Zhiwei Ge
Summary: The paper investigates the oil film and friction characteristics of valve plates with a micro-textured surface and explores the influence of different shapes and sizes of textures. It is found that the textured surface of valve plates can significantly improve friction efficiency, with square textures being the most preferable.
Article
Chemistry, Multidisciplinary
Qiang Zhang, Peitao Shi, Meng Li, Tingcheng Zong, Weijian Song
Summary: This paper proposes a method of hydraulic support reformation and evaluation to speed up the design and manufacturing process. The stress and load-bearing characteristics of the main structure were analyzed using mechanical models and a 3D numerical model. The structural characteristics, compaction characteristics, geological adaptation characteristics, and interference characteristics of the structure were also analyzed. The successful application of the backfilling hydraulic support in the Tangshan mine showed the rationality of the reform design.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Multidisciplinary
Ruidong Hong, Hui Ji, Songlin Nie, Hao He, Ming Guo, Fanglong Yin, Xiaopeng Yan
Summary: An integrated slipper/swashplate structure has been developed for seawater hydraulic axial piston pump, and an optimization design method based on CFD and PSO has been proposed. The leakage and power loss have been reduced by optimization design. The effects of working condition on the film-forming characteristics have been analyzed.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2022)
Article
Acoustics
Hao Pang, Defa Wu, Yipan Deng, Qian Cheng, Yinshui Liu
Summary: This study investigates the effect of working medium on the noise and vibration of water hydraulic axial piston pump (WHAPP) through experimental and theory simulation methods. Results show that using oil as working medium leads to larger noise and vibration compared to using water, mainly due to the greater flow and pressure pulsation of oil. The differences in flow and pressure pulsation are primarily caused by the bulk modulus of the working medium.
Article
Engineering, Electrical & Electronic
Tianzhao Wang, Jingjing Fang, Hao Liu, Lijun Chen, Xiaoping Ouyang, Shengrong Guo, Xiaojun Zhao, Yijie Lu
Summary: This paper investigates the oil film characteristics of high-pressure aviation piston pumps and establishes related models. By analyzing the lubricating, sealing, load-bearing, and overturning characteristics of the oil film, the evolution law of different oil film characteristics with pressure changes is revealed, and suggestions for improving the structure and operating conditions of the pumps are proposed.
Article
Engineering, Chemical
Ruichuan Li, Jilu Liu, Xinkai Ding, Qi Liu
Summary: The output flow pulsation characteristics of the swashplate axial piston pump and the factors influencing it were studied through theoretical modeling and simulation experiments. Factors such as leakage, flow distribution, and oil compressibility were taken into account. The impact of these factors on the output flow pulsations of the pump was analyzed, and corresponding models were established for validation.
Article
Computer Science, Interdisciplinary Applications
Si-Myung Park, Soyeon Park, Jieun Park, Minwook Choi, Laehyun Kim, Gunwoo Noh
Summary: The study proposed a design process using topology optimization to enhance the biomechanical stability and endurance capability of a customized plate for mandibular condyle fracture. The newly designed plate showed significantly improved stress and stiffness performance compared to conventional plates, with approximately twice the endurance capability against fractured bone separation.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2021)
Article
Automation & Control Systems
Shengnan Tang, Yong Zhu, Shouqi Yuan
Summary: This article investigates the problem of fault diagnosis in hydraulic pumps, using a deep learning method for fault identification and introducing the Bayesian optimization algorithm for selecting hyperparameters. By comparing with traditional methods, the results show that CNN-BO can accurately achieve intelligent fault diagnosis of hydraulic pumps.
Article
Engineering, Electrical & Electronic
Dongyun Wang, Congcong Chen, Hongkang Dong
Summary: A mathematical model considering the slot geometry and flow leakage was established to investigate the pressure of the piston chamber and the accuracy of the model was validated. Further simulation results showed that optimizing the triangular slot parameters of the valve plate effectively suppressed the pressure fluctuation and reduced the undershoot and overshoot of the pressure in the piston chamber at the starting moment.
Article
Chemistry, Multidisciplinary
Ming-Yen Chang, Hsing-Hui Huang, Chia-Kai Lu
Summary: This study presents a design for a metal stent that expands under the influence of hydraulic pressure differentials, and uses simulations to explore the effects of various parameters on the stent joint, investigating differences in the stent design.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Kar-Hooi Cheong, Ryouji Doihara, Noriyuki Furuichi, Masaharu Nakagawa, Ruriko Karasawa, Yoshihiro Kato, Kazunori Kageyama, Takuro Akasaka, Yuki Onuma, Takashi Kato
Summary: IV fluid therapy is a common medical practice that has remained unchanged for over a century. However, this method reduces patient mobility and can lead to accidents. To address these issues, this study developed a non-hanging, non-electric IV infusion pump that uses atmospheric pressure as the driving force. Tests showed that the pressurization mechanism using an inflating sleeping-bag-shaped air bag achieved the best flow rate stability.
APPLIED SCIENCES-BASEL
(2022)
