Advanced Materials Research Vols. 503-504

Abstract: The engine model with 4 cylinders is built by SolidWorks, the kinematics and dynamics simulations of the engine virtual prototype are done by COSMOSMotion, the results of kinematics simulation are checked, there are very small errors between the simulation results and the calculation results according to formulas. The mainly results of dynamics simulation are given. The simulation result consists with the parameters of the engine.

Abstract: Aming at the demand of the filed of missile fuse and other weapon systems, a triaxial high- g piezoresistive accelermeter with double-terminal fixed beam-mass structure which can measure x and y axial acceleration and four-terminal fixed structure which can measure z axial acceleration. The design and simulation were also verified using Matlab and ANSYS, the simulation results show that the sensitivities in the x and y axial can be to 1.41µV/g, the sensitivity in the z axial can be to 0.56µV/g. And the transverse sensitivities of accelerometer in triaxial are eliminated effectively. The results of simulation analysis show that the structure can work with the measure range of 150,000g

Abstract: Based on the basic structure of typical high-pressure gear pump, a new kind of high-pressure gear pump was designed and applied in water hydraulic transmission system. In this design, the floating plate of typical gear pump is ceramiclized to improve its wear-resisting property; the balance chamber was used to brace and lubricate the axle. Furthermore, the radial unbalanced force induced by the pressure difference of input and output is balanced by the structure of balance chamber. The dynamic characteristic of gear pump is improved and the axel wear is reduced. By using tip relief of tooth flank profile modification, the leakage rate of gear flank is effectively reduced, and the volume efficiency is improved.

Abstract: Wave energy is a sort of clean energy existing in ocean with mass of storage, and the way how to observe, detect and measure is the very first step of exploring wave energy and other purpose. Shanghai Ocean University has focused this field for long, and proposed a kind of impeller wheel wave energy detector system which is based on buoy or other small offshore equipments. To make the wave energy detector efficiency and precise, some analysis is very necessary especially the fluid analysis. With the analysis results some optimizations for structure and combination of the impeller wheel are chosen to accomplish design target. And the method of CFD simulation and theory will be a reference for relevant research.

Abstract: This paper summarized the current advantages and disadvantages of flotation column, put forward a new type of flotation device - ring inflatable flotation machine and patented. The study showed that the ring inflatable flotation machine has the advantages of low energy and consumption, little abrasion, the probability of attachment and collision is high of particles and bubbles, selection and sweep the election time and frequency adjustment flexibility and large size range of separation. In this paper, the structure diagram of the ring inflatable flotation machine, and do the conditions experiment. Compared the separation efficiency and sorting index with traditional XFD-type flotation machine. Experiment showed that the ring inflatable is economic, effective and high sorting index.

Abstract: Virtual prototyping is a new technology with the rapid development of computer technology. This paper put forward a systematic kinematics and dynamics analysis method based on virtual prototyping technology to simulate multi-body dynamics of robot arm. After the design requirements were introduced, the conceptual design of robot arm was then proposed, and the kinematics and dynamics analysis method was present with the simulation results. The kinematics and dynamics analysis of a robot arm was given as an example, which demonstrates that this method is obviously helpful for product design

Abstract: A series of hierarchical ZSM-48 zeolites was prepared by seed silanization. The structural and textural properties of the hierarchical ZSM-48 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), N2 adsorption-desorption, 27Al and 29Si magic angle spinning nuclear magnetic resonance (MAS NMR), and Fourier transform infrared spectroscopy adsorbed by pyridine (Py-IR). It was found that the crystal size of ZSM-48 was significantly reduced by seed silanization. Due to the secondary porosity in the mesopore region generated in hierarchical ZSM-48, both the total surface area and the pore volume of the material have a considerable increase. The enhancement of the textural properties could be controlled by changing the amount of silanizaiton agent.

Abstract: In this paper, aiming at three material parameter functions of functionally graded coating (FGC) which have different continuities, the influence of functionally gradient coating material continuity on the fracture behaviors of the crack on the interface between the base material and coating is studied. The results show that when the functionally graded coating structure is under a tension load, if the ratio of maximum elastic modulus of the FGC to the elastic modulus of the base is less than 10, the functionally graded layer which has C02 continuity can help to improve the fracture resistance of the interface crack, and if the ratio increases continuously, the functionally graded layer which has C13 continuity can help to improve the fracture resistance of the interface crack, which is of great guiding significance for practical engineering design.

Abstract: The super-thin rod cylindrical grinding is a problem in the machining, super-thin rod with large slenderness ratio, poor rigidity, large roundness error after grinding, and with low processing efficiency. This study uses cylindrical honing processing super-thin rod parts, and designing the super-thin rod cylindrical honing head, carrying on a honing test. The results show that the super-thin rod cylindrical coarse honing capacity reach up to 0.002mm/double stroke(length 1698mm), surface roughness reach up to Ra 0.8 ~ 0.025μm after honing, roundness error reach up to 2μm. It fully shows that super-thin rod cylindrical honing technology has high precision, low surface roughness, flexible production processing and high efficiency.

Abstract: Y-shaped tee is modeled by three-dimensional graphics software and its flow field is analyzed and numerical simulated by CFD software. The mechanical stability of Y-shaped tee in the work process is analyzed by fluid-structure coupling. The results show that the pressure of water is gradually decreased and the velocity of water is gradually increased as the main flow is near Y-shaped tee; the branch of pipeline exits the largest failure risk by the coulomb failure expression. Simulation results are consistent to the practice, which provides important theoretical basis for improving and optimization of Y-shaped tee.