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Modeling and analyzing on pressure distribution of plane port pair
based on disk-shape gap |
YANG Hua-yong1, WANG Bin2, ZHOU Hua1 |
1. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;
2. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract A calculating model for optional location pressure at every sealing area was presented according to the real operating condition of porting mechanism in order to achieve the pressure field distribution of plain porting mechanism in axial piston pump. All formulas in cylindrical coordinate were deduced from the universal Reynolds equation because of the twodimensional gap flow between disks. Both the NewtonRaphson, the iterated algorithm and the integration with boundary conditions were introduced. The distribution results on the internal and the external sealing area were calculated. When rext/rint, the ratio of the internal and the external radius in circular sealing area was less than 1.5, the pressure and the radius was nearlinear dependency within the linear segment of the whole curve, so it can be simplified to analyze. The nonlinear relation should be considered when rext/rint was more than 1.5. The analysis formula and the iterated calculation are applicable to the calculation under the low and medium pressure field of sealing area. The iterated method has the advantages of simple steps and quick convergence, while the analysis formula can get more exact results especially for high pressure and wider sealing area (a greater rext/rint).
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Published: 19 March 2012
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圆盘缝隙的平面配流副压力分布模型与解析
为了获得平面配流机构的压力分布特征,根据轴向柱塞泵配流机构的实际工况,基于二维圆盘缝隙流动的Reynolds方程推导了柱面坐标下各密封带任一点的压力计算模型,引入牛顿拉弗森法迭代和根据边界积分2种求解方法,并在密封带流场域内计算内、外密封区的压力分布.结果表明,对内外半径比rext/rint小于1.5的圆环密封区,压力分布位于整个曲线的线性段而随半径呈近似线性关系,处于这一区间分析时可作简化,半径比大时非线性关系不可忽略.模型的解析与迭代2种算法均适用于中低压的窄密封带压力分布计算,且迭代法简单、收敛快,而对高压及宽密封带(内外半径比大)前者更为准确.
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[1] KALIN M, MAJDIC F, VIZINTIN J, et al. Analysis of the longterm performance and tribological behavior of an axial piston pump using diamondlikecarboncoated piston shoes and biodegradable oil [J]. Journal of Tribology, 2008, 130(1): 011013.
[2] 周华,王彬,杨华勇.轴向柱塞泵摩擦副润滑膜性能动态试验系统分析[J].润滑与密封,2006(7):811.
ZHOU Hua, WANG Bin, YANG Huayong. Analysis on dynamic experimental system of lubrication film properties of friction pairs in axial piston pump [J]. Lubrication Engineering, 2006(7): 811.
[3] AHN S Y, RHIM Y C, HONG Y S. Lubrication and dynamic characteristics of a cylinder block in an axial piston pump [C]∥ Proceedings of the World Tribology Congress III 2005. Washington: ASME, 2005:223224.
[4] 李勇,施光林,陈兆能.新型液压马达配流盘的受力分析与计算[J],农业机械学报,2007,38(1): 173176.
LI Yong, SHI Guanglin, CHEN Zhaoneng. Mechanical analysis and calculation of newstyle distribution valves in hydraulic motors [J]. Transactions of the Chinese Society for Agricultural Machinery, 2007, 38(1): 173176.
[5] 项辉宇,袁柳樱,张力.柱塞缸体间油膜润滑压力的数值[J].北京工商大学学报:自然科学版,2007, 25(1): 2225.
XIANG Huiyu, YUAN Liuying, ZHANG Li. Numerical calculation for the lubrication pressure of the piston and cylinder tribopairs [J]. Journal of Beijing Technology and Business University: Natural Science Edition, 2007, 25(1): 2225.
[6] 许耀铭.油膜理论与液压泵和马达的摩擦副设计[M].北京:机械工业出版社,1987: 290293.
[7] 李元勋,陈卓如,钟廷修.一种新型倾侧力矩全平衡端面配流机构及其优化设计[J]. 中国机械工程,1999, 10(1): 6771.
LI Yuanxun, CHEN Zhuoru, ZHONG Tingxiu. A new plain flow distribution pair balancing the tilting moment of distributor completely and its optimum design[J]. China Mechanical Engineering, 1999, 10(1): 6771.
[8] WANG Bin, ZHOU Hua, YANG Huayong. The test rig for lubrication properties of port pairs in axial piston pump and preliminary test investigation on it[C]∥Proceedings of the 10th Scandinavian International Conference on Fluid Power. Tampere, Finland:[s.n.], 2007: 269278.
[9] 艾青林,周华,杨华勇.微米级电液位置反馈控制系统的研究[J].浙江大学学报:工学版,2005, 39(12): 19361940.
AI Qinglin, ZHOU Hua, YANG Huayong. Research on micron electrohydraulic position feedback control system [J]. Journal of Zhejiang University: Engineering Science, 2005, 39(12): 19361940.
[10] 盛敬超.液压流体力学[M].北京:机械工业出版社,1980: 217221.
[11] MANRING N D, WRAY C L, DONG Z L. Experimental studies on the performance of slipper bearings within axialpiston pumps [J]. Journal of Tribology, 2004, 126(3): 511518. |
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