Papers by Keyword: Spherical Plain Bearing

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Authors: Ming Qiu, Ren Song Hu, Ying Chun Li, Zhuo Pei Yang, Chuang Chuang Duan
Abstract: The effects of acrylamide modified liner on bonding properties and tribological properties of self-lubricating spherical plain bearings were explored by used of Instron5944 electronic universal testing machine and homemade spherical plain bearings friction and wear tester. The results showed that the bonding properties of bearings modified by acrylamide modified liner were much more improved than those of the unmodified bearings; Self-lubricating spherical plain bearing friction and wear properties and oscillating frequency obvious correlational dependence. With the increase of the oscillation frequency, the friction coefficient and the wear loss increased, while the friction temperature rose. The friction coefficient, wear loss and friction temperature of bearings modified were much more improved than those of the unmodified bearings. It showed that the liners after modification treatment can improve the tribological properties of self-lubricating spherical plain bearings.
306
Authors: Ming Qiu, Z.L. Gao, S.J. Yao, Long Chen
Abstract: The working principle and performance characteristics of a self-made oscillation tribo-tester were introduced. Under different oscillation frequency and pressure conditions, the friction coefficient and linear wear of spherical plain bearings with polytetrafluoroethylene (PTFE) woven liner were investigated. By using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), the wear mechanism of the spherical plain bearing was analyzed. The results indicate that with the oscillation frequency increases, the friction coefficient of spherical plain bearings decreased while the wear loss increased. In the high frequency of 4.8Hz, the reduction ranges of the friction coefficient is not obvious with the contact pressure increased, but the effect of contact pressure on the wear of the spherical plain bearing is great. During the experiment, adhesive wear, abrasive wear and spalling wear took place on the surfaces of woven liners.
406
Authors: Ming Qiu, Zhi Lun Gao, Guo Feng Wang, Long Chen
Abstract: The friction and wear behaviors of three kinds of spherical plain bearings with PTFE woven liners were investigated by a high oscillating frequency and heavy load tribo-tester. Dry sliding tests were carried out at an oscillating frequency of 1.2Hz and four different loads. With the help of SEM and EDS, the differences of worn surfaces of the three kinds were investigated. The results indicate that the wear depth and friction temperature for the three kinds of bearings show increasing trend with the increasing of load, while the friction coefficient is the opposite. The comprehensive performance of bearing II is the best in the whole course of experiment, while the bearing III is the worst. The adhesive and abrasive wear mechanisms are appeared on the surface of liners. The quality of boning influences the tribological property of the spherical plain bearing.
763
Authors: Zhi Ning Jia, Cai Zhe Hao, Chao Han
Abstract: The influences of metal surface roughness on the shear strength and peel strength of fiber woven composites (FWC) were studied. Test results show that the metal surface roughness have an important impact on the shear strength and peel strength of FWC. Higher or lower surface roughness can reduce the adhesive strength of FWC. When the best roughness is 0.8, the maximum peel strength and shear strength of FWC are obtained, which ensure the operation reliability and enough life of the spherical plain bearing (SPB) with self-lubrication fabric liner.
258
Authors: Jing Wang, Li Ying Yang, Shou Ren Wang, Guang Ji Xue, Chang Xiu Zhou
Abstract: Spherical plain bearing is a sliding bearing have a spherical contact surface,it can bear larger load and automatically adjusted to the self-alignin. TiAl-based composite material is a material that be used to lightweight spherical plain bearing. The Simulation used the finite element software Ansys for the bearing’s static analysis.The material of outer ring using normal bearing steel, one group used the TiAl-based composite materials as the material of the inner ring, Another group the inner ring material is bearing steel 9Cr18. The law of the stress and strain produced by the two groups is consistent,the deformation of the composite materials is bigger under the same load, its elasticity modulus and density is smaller compared to the ordinary bearing steel,the composite material has the advantages of high specific strength especially in the occasions have strict requirements of the bearing weight.
649
Authors: Zhao Lei Liu, Xue Jin Shen
Abstract: The structure of the woven fabric liner of spherical plain bearing with self-lubricating is introduced, according to the microstructure and the actual weave pattern of the liners, the fibre yarns undulation and the distance between two fibre yarns are taken into account. A general elastic properties analysis model adjusting to the stain woven fabric liner is built. The elastic properties of the fabric liner are obtained using the method of micromechanical through getting the material and geometric parameters of the fiber yarns in the basis of stiffness average. The parameter expression of the compliance matrix and nine elastic constants are obtained and the theory model of fabric liner is validated by the experiment. The calculation results are in good agreement with the experimental data.
190
Authors: Ming Qiu, Guo Feng Wang, Yao Xing Bai, Long Chen, Ying Chun Li
Abstract: Experiments were carried out to investigate the tribological properties of spherical plain bearings with copper grid composite liners filled PTFE under two contact pressures(40MPa,60MPa), four oscillating frequencies (1.2Hz, 1.8Hz, 2.4Hz, 3.0Hz) and two swinging conditions. With the help of SEM, EDS and Three-dimensional morphology profiler, the wear mechanism was analyzed. The results indicate the coefficients and wear depths under tilt swinging condition are higher than those of swivel swinging. While the friction temperature show the contrary trend. The research discovers that the friction temperature has a great influence on tribological properties of spherical plain bearings. The analysis demonstrates that the main wear mechanisms are the adhesive and abrasive wear under the two swinging conditions and extrusive wear exist also.
3589
Authors: Ming Qiu, Zhi Lun Gao, Guo Feng Wang, Long Chen
Abstract: The friction and wear behaviors of three kinds of spherical plain bearings with PTFE fabric composite liners were investigated by a high oscillating frequency and heavy load tribo-tester. Dry sliding tests were carried out at different oscillating frequencies. With the help of SEM and EDS, the differences of worn surfaces of the three spherical bearings were investigated. The results indicate that the fiber woven with PTFE effects the friction and wear characteristics of bearing, the tribological properties of bearing with Kevlar/PTFE fiber woven liner is the best in the three kinds of bearing. The abrasive wear are appeared on the surface of wore liners of bearingⅠ,while bearingⅡappeared normal wear, bearing III showed serious adhesive wear and abrasive wear.
607
Authors: Yan Jun Li, Bao Fu Li
Abstract: Against the problem of large machining error and low productivity of aluminum alloy spherical plain bearing, the paper is concentrated on building finite element model in MATLAB to research the radial and axial deformation law under various cutting conditions with theories of heat transfer, isoparametric element and functional variational method, providing theoretical and data support to enhance machining accuracy of spherical plain bearing outer ring.
3904
Authors: Yan Jun Li, Bao Fu Li
Abstract: Against the problem of large machining error and low productivity of aluminum alloy spherical plain bearing, the paper is concentrated on building finite element model in MATLAB to research the radial and axial deformation law under various cutting conditions with theories of heat transfer, isoparametric element and functional variational method, providing theoretical and data support to enhance machining accuracy of spherical plain bearing outer ring.
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