轴向柱塞泵论文：球面配流副轴向斜柱塞泵配流特性研究.doc

轴向柱塞泵论文：球面配流副轴向斜柱塞泵配流特性研究【中文摘要】文章以博世力士乐公司生产的A4VSG750斜盘式斜柱塞高压轴向斜柱塞泵为研究对象,在考虑液压油可压缩性的基础上,通过流场的CFD解析、流动显示以及与理论分析相结合的研究方法,分析柱塞倾角、配流盘错配角、吸油口压力以及斜盘转角对配流过程中轴向柱塞泵的瞬时流量脉动、柱塞腔内压力波动以及缸体所受液压反推力矩的影响规律,从而找出降低柱塞泵工作噪声的方法。具体研究顺序如下：首先以A4VSG750斜盘式轴向斜柱塞泵为实体建立三维模型。提取柱塞腔以及配流盘腰型槽、三角槽等流道。利用ICEM划分流道网格,在划分网格时,采用thin-cut网格控制法对球面配流副间隙油膜等流道的关键部位进行准确划分。其次根据柱塞泵实际工作环境设定边界条件并建立瞬态计算模型,为符合实际情况,将模型中的液压油设置为具有可压缩性的流体,并根据A4VSG750轴向斜柱塞泵说明书的要求,提高了吸油口的油液压力。最后将模型导入Star-CD软件进行CFD模拟计算,通过提取、分析数据得到如下结论：对于球面配流副轴向斜柱塞泵而言,改变柱塞倾角、错配角、斜盘转角、吸油口压力以及负载压力的大小,将对柱塞泵出口流量脉动、柱塞腔内压力以及缸体液压反推力矩产生不同的影响。适当增加柱塞倾角可以有效减小气蚀发生的可能性；选择较小的配流盘错配角可以减小流量脉动、减小油缸内压力冲击；增大吸油压力可减小油缸吸油压力的真空度,降低气蚀噪声；增大斜盘转角能够减小流量脉动系数,但同时增加了油缸内的压力冲击。本文研究的柱塞泵处于最佳工作状态时的尺寸参数：柱塞倾角为4.2；配流盘错配角为5；吸油压力为2.5MPa；斜盘转角为13本文通过分析研究所得到的这些有理论意义和实用价值的结论和成果,为今后设计配流降噪效果明显的泵体结构以及配流方式提供了思路和方法。【英文摘要】This article use the A4VSG750, a swashplate and tilting cylinder block type axial plunger pump, which produced by REXROTH to be research object. Analysis how piston dip angle, valve plate deflection angle, inlet pressure and swash plate angle size influence the cavitation flow processes, the pressure of the plunger and the cylinder pressure peak in the instantaneous flow axial piston pump. The specific work in the following order:First, produce the 3D model of the A4VSG750 tilting cylinder block type axial plunger pump, extraction the waterway of the cylinder, the valve plate groove back and the triangular slot. Then use the thin-cut methods to mesh grid of the key positions of waterway, such as spherical assignment with the Deputy Vice-film.Second, according to actual working conditions under the pump to set the boundary conditions and the establishment of the transient model, in keeping with the actual situation, creating a compressibility of hydraulic oil, and according to product specification requirements, improve the inlet of the oil pressure.Finally, import the model into Star-CD CFD simulation software, and through the extraction, analysis of data, then get the following conclusions:For a spherical assignment tilting cylinder block type axial plunger pump, changing the piston dip angle, the wrong supporting roles angle, swash plate angle, oil pressure and outlet pressure will influence the flow pulse, pressure shock in cylinder, the cylinder hydraulic pressure to push anti-torque. Appropriate increasing in plunger angle can reduce the probability occurrence of cavitation; Choosing a smaller valve plate deflection angle can reduce the pulse coefficient, reduce the impact of the fuel tank pressure; Increasing the suction pressure can reduce the vacuum in the cylinder, and reduce cavitation noise; Increasing swashplate angle can reduce the flow pulsatiliry index, but increase the pressure shock in cylinder. This article studied the axial piston pump in the best working state of the size parameters:The piston dip angle is 4.2; The valve plate deflection angle is 5; The suction pressure is 2.5MPa; The plate angle is 13.【关键词】轴向柱塞泵 柱塞倾角 配流盘 压力流量特性 液压反推力矩【英文关键词】Axial piston pump Piston dip angle Valve plate Pressure and flow characteristics Hydraulic Anti-torque【目录】球面配流副轴向斜柱塞泵配流特性研究摘要6-7Abstract7第1章 绪论10-171.1 课题研究的目的和意义10-111.2 轴向柱塞泵配流特性的研究现状11-141.3 课题研究的主要内容及基本思路14-171.3.1 课题研究的主要内容14-151.3.2 课题研究的基本思路15-17第2章 球面配流副轴向斜柱塞泵数学模型17-352.1 轴向斜柱塞泵出口流量数学模型17-212.1.1 柱塞运动分析17-202.1.2 出口流量数学模型建立20-212.2 球面配流副力学模型21-292.2.1 球面配流副间隙油膜流体运动分析22-272.2.2 球面配流副力学模型建立27-292.3 轴向斜柱塞泵柱塞腔内压力模型29-342.3.1 过流面积分析29-322.3.2 流量系数与油液惯性影响因素分析32-332.3.3 柱塞腔内压力数学模型建立33-342.4 小结34-35第3章 配流过程CFD解析35-483.1 CFD技术基础35-383.2 解析假定和求解过程383.2.1 解析假定383.2.2 求解过程383.3 几何模型建立与网格划分38-453.3.1 几何模型建立38-433.3.2 网格划分43-453.4 边界条件设定与瞬态计算模型建立45-473.4.1 边界条件的设定45-463.4.2 瞬态计算模型建立46-473.5 小结47-48第4章 球面配流副轴向斜柱塞泵配流特性研究48-844.1 柱塞泵内部流场常规特性分析48-564.1.1 柱塞腔内预升压力和预卸压力梯度对噪声的影响分析48-524.1.2 液压油回冲现象分析52-544.1.3 影响柱塞泵体积流量脉动系数的因素分析54-564.2 轴向柱塞泵缸体液压力矩分析56-574.3 柱塞倾角对柱塞泵内流场特性的影响57-634.3.1 柱塞倾角对柱塞腔内压力脉动的影响58-604.3.2 柱塞倾角对出口瞬时流量脉动的影响60-614.3.3 柱塞倾角对缸体液压力矩脉动的影响61-634.4 错配角对柱塞泵内流场特性的影响63-684.4.1 错配角对柱塞腔内压力脉动的影响65-674.4.2 错配角对出口瞬时流量脉动的影响674.4.3 错配角对缸体液压力矩脉动的影响67-684.5 斜盘转角对柱塞泵内流场特性的影响68-724.5.1 斜盘转角对柱塞腔内压力脉动的影响69-704.5.2 斜盘转角对出口瞬时流量脉动的影响70-714.5.3 斜盘转角对缸体液压力矩脉动的影响71-724.6 吸油压力对柱塞泵内流场特性的影响72-764.6.1 吸油压力对柱塞腔内压力脉动的影响73-744.6.2 吸油