Xu, Jimin Li, Changhuan Miao, Xusheng Zhang, Cuiping Yuan, Xiaoyang
Published in
Chinese Journal of Mechanical Engineering
There is a consensus in the aerospace field that the development of reusable liquid rockets can effectively reduce the launch expense. The pursuit of a long service life and reutilization highly depends on the bearing components. However, the rolling element bearings (REBs) used in the existing rocket turbopumps present obvious and increasing limit...
Zhou, Junjie Zhou, Jichen Jing, Chongbo
Published in
Chinese Journal of Mechanical Engineering
The interface between the slipper/swash plate is one of the most important frication pairs in axial piston pumps. The test of this interface in a real pump is very challenging. In this paper, a novel pump prototype is designed and a test rig is set up to study the dynamic lubricating performance of the slipper/swash-plate interface in axial piston ...
Wang, Wenwei Li, Yiding Lin, Cheng Yang, Sheng
Published in
Chinese Journal of Mechanical Engineering
An equivalent mechanical model with the equivalent physical meaning of mass-spring-damping is proposed for cylindrical lithium-ion batteries through experiments and theory. The equivalent mechanical model of a cylindrical lithium-ion battery consists of a spring-damping parallel unit. Therefore, a spring-damping parallel unit connecting a damping u...
Song, Majun Guo, Sheng Wang, Xiangyang Qu, Haibo
Published in
Chinese Journal of Mechanical Engineering
To assist an amputee in regaining his or her daily quality of life, based on analysis of the motion characteristics of the human hip, a 2-UPR/URR parallel mechanism with a passive limb was designed. The inverse kinematics of this mechanism was analyzed based on a closed-loop vector method. The constrained Jacobian matrix and kinematic Jacobian matr...
Wang, Yongqing Gan, Yongquan Liu, Haibo Han, Lingsheng Wang, Jinyu Liu, Kuo
Published in
Chinese Journal of Mechanical Engineering
A honeycomb structure is widely used in sandwich structure components in aeronautics and astronautics; however, machining is required to reveal some of its features. In honeycomb structures, deficiencies, such as burrs, edge subsiding, and cracking, can easily appear, owing to poor specific stiffness in the radial direction. Some effective fixation...
He, Yinshui Yu, Zhuohua Li, Jian Yu, Lesheng Ma, Guohong
Published in
Chinese Journal of Mechanical Engineering
In the robotic welding process with thick steel plates, laser vision sensors are widely used to profile the weld seam to implement automatic seam tracking. The weld seam profile extraction (WSPE) result is a crucial step for identifying the feature points of the extracted profile to guide the welding torch in real time. The visual information proce...
Shen, Fei Chen, Chao Xu, Jiawen Yan, Ruqiang
Published in
Chinese Journal of Mechanical Engineering
Most gear fault diagnosis (GFD) approaches suffer from inefficiency when facing with multiple varying working conditions at the same time. In this paper, a non-negative matrix factorization (NMF)-theoretic co-clustering strategy is proposed specially to classify more than one task at the same time using the high dimension matrix, aiming to offer a ...
Thomas, Mervin Joe Joy, M. L. Sudheer, A. P.
Published in
Chinese Journal of Mechanical Engineering
Parallel Kinematic Machines (PKMs) are being widely used for precise applications to achieve complex motions and variable poses for the end effector tool. PKMs are found in medical, assembly and manufacturing industries where accuracy is necessary. It is often desired to have a compact and simple architecture for the robotic mechanism. In this pape...
Wang, Shengde Yao, Zhenqiang Shen, Hong
Published in
Chinese Journal of Mechanical Engineering
Taylor–Couette–Poiseuille (TCP) flow dominates the inner water-cooling circulation of canned motor reactor coolant pumps. Current research on TCP flow focuses on torque behaviors and flow regime transitions through experiments and simulations. However, research on axial flow resistance in a large Reynolds number turbulent state is not sufficient, e...
Meyghani, Bahman Wu, Chuansong
Published in
Chinese Journal of Mechanical Engineering
This article reviews the status of thermomechanical analysis of the friction stir welding (FSW) process for establishing guidelines for further investigation, filling the available research gaps, and expanding FSW applications. Firstly, the advantages and applications of FSW process are introduced, and the significance and key issues for thermomech...
