高压齿轮泵浮动侧板的动态平衡机理
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摘要
针对高压齿轮泵浮动侧板磨损问题,在解析齿轮泵内部流场的基础上重点研究浮动侧板反推力作用点变化规律和导致侧板产生倾覆力矩的关键因素。以某型号高压大排量齿轮泵为模型,运用CFD软件解析齿轮泵内部流场并根据侧板结构特点建立压紧力和反推力的求解微分方程,求得一个轮齿啮合周期内的侧板倾覆力矩变化规律,同时通过建立齿轮泵工作腔压力测试系统对该理论分析结果进行验证。结果显示:额定工况下试验值与理论值的误差为4.18%,当齿轮转角φ=14°时倾覆力矩达到最大值Ms=82.16 N·m。该研究结果可为高压大排量齿轮泵浮动侧板倾覆力矩计算和侧板结构优化设计提供理论基础和技术支撑。
To solve the high-pressure gear pump floating end plates wear problems, the paper focuses on the variation of anti-thrust point of floating side plate and the key factors that lead to overturning moment of side plate based on the flow field inside the gear pump analysis. The CFD software is used to resolve the internal flow field by a certain type of high-pressure and large displacement gear pump model. The rule of the end plate overturning moment variety in a gear tooth meshing cycle is obtained by to establish the differential equation of the compressive force and the counter thrust. At the same time, the result of the theoretical analysis is verified by the establishment of gear pump working chamber pressure test system. The result shows that the value error between the test and theoretical is 4.18%, when the tooth angle φ=14° the maximum overturning moment value Ms=82.16 N·m. The result provides a theoretical basis and technical support for the calculation of the overturning moment of the floating side plate of the high pressure large displacement gear pump and the optimization design of the side plate structure.
To solve the high-pressure gear pump floating end plates wear problems, the paper focuses on the variation of anti-thrust point of floating side plate and the key factors that lead to overturning moment of side plate based on the flow field inside the gear pump analysis. The CFD software is used to resolve the internal flow field by a certain type of high-pressure and large displacement gear pump model. The rule of the end plate overturning moment variety in a gear tooth meshing cycle is obtained by to establish the differential equation of the compressive force and the counter thrust. At the same time, the result of the theoretical analysis is verified by the establishment of gear pump working chamber pressure test system. The result shows that the value error between the test and theoretical is 4.18%, when the tooth angle φ=14° the maximum overturning moment value Ms=82.16 N·m. The result provides a theoretical basis and technical support for the calculation of the overturning moment of the floating side plate of the high pressure large displacement gear pump and the optimization design of the side plate structure.
引文
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[7]金朝铭.液压流体力学[M].北京:国防工业出版社,1994.
[8]DHAR S,VACCA A.A Novel CFD-Axial Motion Coupled Model for the Axial Balance of Lateral Bushings in External Gear Machines[J].Simulation Modelling Practice and Theory,2012,26:60-76.
[9]MUCCHI E,DALPIAZ G,RIVOLA A.Elastodynamic Analysis of a Gear Pump.Part I Pressure Distribution and Gear Eccentricity[J].Mechanical Systems and Signal Processing,2010,24:2160.
[10]李玉龙.异齿数和侧板倾斜对齿轮泵轴向困油泄漏的影响[J].液压与气动,2010(11):12-14.
[11]臧克江,周欣,牛政科.齿轮泵困油压力测试系统设计[J].工程设计学报,2006,13(4):264-266.
[2]KOC E,HOOKE C J.An Experimental Investigation into the Design and Performance of Hydrostatically Loaded Floating Wear Plates in Gear Pumps[J].Wear,1997,209:184-192.
[3]徐伟,尹延国,田清源.铁基粉末冶金齿轮泵侧板摩擦学性能研究[J].粉末冶金工业,2011,21(3):20-23.
[4]WANG S,SAKURAI H,KASAREKAR A.The Optimal Design in External Gear Pumps and Motors[J].Mechatronics,2011,16:945-952.
[5]李玉龙,许泽银,徐强.齿轮泵补偿面设计的参数化研究[J].农业机械学报,2005,36(8):70-73.
[6]王安麟,张小路,刘巍,等.齿轮泵轴向浮动侧板力矩平衡机制改进[J].同济大学学报(自然科学版),2013,41(10):1579-1583.
[7]金朝铭.液压流体力学[M].北京:国防工业出版社,1994.
[8]DHAR S,VACCA A.A Novel CFD-Axial Motion Coupled Model for the Axial Balance of Lateral Bushings in External Gear Machines[J].Simulation Modelling Practice and Theory,2012,26:60-76.
[9]MUCCHI E,DALPIAZ G,RIVOLA A.Elastodynamic Analysis of a Gear Pump.Part I Pressure Distribution and Gear Eccentricity[J].Mechanical Systems and Signal Processing,2010,24:2160.
[10]李玉龙.异齿数和侧板倾斜对齿轮泵轴向困油泄漏的影响[J].液压与气动,2010(11):12-14.
[11]臧克江,周欣,牛政科.齿轮泵困油压力测试系统设计[J].工程设计学报,2006,13(4):264-266.