Recent Patents on Mechanical Engineering - Volume 10, Issue 4, 2017

Background: In this study, an energy conserved wedge-platform thrust slider bearing is introduced. The realization of this bearing depends on the occurrence of the boundary slippage on the stationary surface in the bearing inlet zone. Objective: The aim was to show the improvement of the performance of the wedge-platform thrust slider bearing by applying the boundary slippage technology. Methods: The modified Reynold Read More

Background: In recent years, the influence of tire noise on vehicle noise, vibration, and harshness (NVH) has increased because of the reduction of other types of noise such as engine noise and aerodynamic noise. Studies have focused on the influence of the tire structure on vibration noise, but not specifically on the belt structure. Objective: The aim of this study was to analyze the influence of the belt structure on tire vibration a Read More

Background: A freezer drawer in a French door refrigerator subjected to repetitive food loading was found to have fractured in the field. Inspection of the field failures was carried out to determine the root causes in the design failures of the drawer. The primary failures came from a faulty design of the drawer that was not strong enough to withstand the loads caused by repetitive open and closing of the drawer. Objective: Read More

Background: Hydraulic excavator as important engineering machinery plays an extremely significant role in engineering construction. Multi-way valve is the core element of hydraulic system of excavator, which is used for controlling the flow of oil and the flow distribution of actuators, its performance has important implications for the whole machine. Objective: In order to guide the design and optimization of spools of ma Read More

Background: The 6-DOF super-length journey parallel robot is one of the most important equipments in the spacecraft docking motion simulation platform, and the simulation precision of the spacecraft docking motion simulation platform is determined by the 6-DOF super-length journey parallel robot’s pose accuracy. The pose error exits unavoidably because of the effect of kinematic parameter errors on the pose. Objec Read More

Background: In several practical contexts, the core-shell interface of a soft particle may exhibit hydrodynamic slip. A significant enhancement in fluid transport over a hydrodynamically slipping surface is expected. However, in the present context, the hydrophobic surface is covered by a permeable shell. The impact of the hydrophobic core on the hydrodynamics of a soft particle has not been addressed before. Objective: Read More

Background: With the rapid development of global economy, the utilization of water resources has become a prominent issue. Water shortage is a serious challenge, thus, water conservation is an important measure to help alleviate a water resources shortage and promote economic and social sustainable development. Currently, the inefficient use of water resource is very common in metropolitan and rural areas. Therefore, th Read More

Background: One of the labor-consuming and dangerous operations in technological process of processing reactors is the one on transportation of firm wastes, as it is necessary to take into account the danger of materials to an environment and their harmful influence on health of the attendants and population. Objective: The recent paper is devoted to theoretical and experimental study of two phase (particle/air) medi Read More

Background: In the face of heavy production pressure, harsh processing environments and the increasing shortage of energy, spindles, the core part of CNC machine tools, must be modified from the traditional model and developed into a new form featured by intelligence and energy-saving. Objective: This paper reviewed recent papers and patents related to the electric spindle and aimed to design a multifunctional spindle w Read More

Background: The load characteristics of pick cutting coal seam with coal-rock interface were studied by Time-frequency method in this paper. The common signal processing schemes were compared, and the suitable test load EMD (Empirical Mode Decomposition) empirical mode decomposition scheme for signal decomposition and denoising was selected. Objective: The cutting load power spectra were obtained a Read More