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    CHARACTERISTIC STUDY FOR THE HETEROGENEOUS ROLLING BEARING MATCH WAY by WU KaiSong, DENG Tao, CAI Can, FENG Yan

    Published 2015-01-01
    “…When angular contact ball bearings match together,due to high demand of manufacturing and installation precision,only increasing the number of angular contact ball bearings to increase the radial bearing capacity has great limitations.Therefore,it was considered that using heterogeneous rolling bearing match to increase the radial bearing capacity of bearing match has obvious advantages.Structure characteristics and mechanical properties of the existing angular contact ball bearing match way has been analyzed and compared,and then the applicability of them has been explained.For the existence of the high accuracy requirement and the low radial load capacity,a way of heterogeneous rolling bearing match way was put forward.Its characteristic is to use deep groove ball bearings or cylindrical roller bearing to bear radial load bearing,and angular contact ball bearing to bear axial load.Then,the formula was derived for calculating the life of a heterogeneous rolling bearing match way.At the same time the life calculation formula of"QBC"angular contact ball bearing was deduced.Comparison of the two above show that heterogeneous rolling bearing match way obviously improves the radial bearing capacity,obviously prolong service life,and the demand of bearing manufacturing and installation accuracy is low.The results have been applied to an import petrochemical plant methylamine pumps.After calculation,heterogeneous rolling bearing match way increases by 52.5%.…”
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    Finite Element Analysis of the Excavation Stability of Deep and Large Ventilation Shafts of Zimuyan Tunnel Using the Raise Boring Machine Method in a Karst Area by Guofeng Wang, Fayi Deng, Kaifu Ren, Yougqiao Fang, Haiyan Xu

    Published 2025-01-01
    “…The results indicate that the karst cave caused an increase in the radial displacement of the surrounding rock, and the radial displacements and stress in the surrounding rock increased linearly with depth. …”
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    Response and Damage Characteristics of Segmental Tunnel Lining under Various Dynamic Load Conditions by Jinling Chai, Ke Wang, Shihao Wang, Yong Wang, Yi Liu

    Published 2024-01-01
    “…The structure can be categorised into the major deformation region (with an angle within 60° of the vertical direction) and the minor deformation region (with an angle within 30° of the horizontal direction), determined by the structure’s radial deformation. The maximum radial velocity of the nodes in the major deformation area is greater and swifter, whereas the maximum radial velocity of the nodes in the minor deformation region is lesser and mostly equivalent in extent. …”
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    A Direct Meshless Method for Solving Two-Dimensional Second-Order Hyperbolic Telegraph Equations by Fuzhang Wang, Enran Hou

    Published 2020-01-01
    “…In this paper, a direct meshless method (DMM), which is based on the radial basis function, is developed to the numerical solution of the two-dimensional second-order hyperbolic telegraph equations. …”
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    MOTION PRECISION ANALYSIS OF PERMANENT MAGNET SYBCHRONOUS GRINDING MOTORIZED SPINDLE by GAO Feng, CHENG MingKe, LI Yan, HE PingPing, JIA WeiTao

    Published 2020-01-01
    “…Based on the spindle vibration error and thermal analysis,mathematical models of radial error motion,tilt error motion and axial error motion are established. …”
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    Stiffness Model of Rolling Bearing Considering Clearance and Analysis of Its Time-varying Characteristic by Runlin Chen, Qin Han, Menghao Zhang, Yanchao Zhang, Longlong Li, Yahui Cui

    Published 2021-03-01
    “…The results show that the average stiffness of the bearing is negatively related to the radial clearance and positively related to the load and the number of rolling elements; the stiffness amplitude change rate generally increases with the increase of the radial clearance, and decreases with the increase of the load and the number of rolling elements. …”
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    Component Analysis of Unsteady Hydrodynamic Force of Closed-Type Centrifugal Pump with Single Blades of Different Blade Outlet Angles by Yasuyuki Nishi, Junichiro Fukutomi

    Published 2015-01-01
    “…Single-blade centrifugal impellers for sewage systems undergo both unsteady radial and axial thrusts. Therefore, it is extremely important for the improvement of pump reliability to quantitatively grasp these fluctuating hydrodynamic forces and determine the generation mechanism behind them. …”
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