球面配流副轴向斜柱塞泵配流特性研究

发布时间：2018-01-04 22:09

本文关键词：球面配流副轴向斜柱塞泵配流特性研究　出处：《西南交通大学》2011年硕士论文　论文类型：学位论文

【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。
[Abstract]:A4VSG750 swash plate inclined plunger high-pressure axial piston pump syncline production in the BOSCH Rexroth company as the research object, considering the compressibility of hydraulic oil, through the CFD analysis of flow field, flow visualization and research methods combined with the theoretical analysis, analysis of piston inclination angle, valve inlet pressure and complex supporting cable wheel angle of valve plate of axial piston pump in the process of flow pulsation, the plunger chamber pressure fluctuation and the influences of hydraulic cylinder thrust torque, so as to find out the method of reducing noise of piston pump. The specific research as follows:
Firstly the A4VSG750 axis swashplate piston pump for solid syncline three-dimensional model. The extraction of plunger cavity, valve plate groove back, theTriangular slot. The use of ICEM grid in grid division, division, accurate division of the thin-cut grid control method of key parts of the spherical valve clearance oil film flow.
Secondly, according to the actual working environment of the plunger pump to set the boundary conditions and the establishment of the transient model is consistent with the actual situation, the hydraulic oil in the model set with fluid compressibility, and according to the A4VSG750 axis syncline piston pump specification requirements, improve the inlet of the oil pressure.
Finally, the model is introduced into the Star-CD software for CFD simulation calculation, and the following conclusions are obtained by extracting and analyzing the data.
For the spherical valve countershaft syncline plunger pump, changing the piston dip angle, fault angle, swash plate angle, inlet pressure and the size of load pressure, the outlet flow pulsation of piston pump, influence plunger chamber pressure and cylinder of hydraulic reverse thrust moment. Appropriate increase in plunger angle can reduce the possibility of cavitation occurrence; selection the smaller valve knotted angle can reduce the flow pulsation, reduce the cylinder pressure impact; increasing suction pressure can reduce the cylinder suction pressure vacuum and reduce cavitation noise; increasing swashplate angle can reduce the flow pulsation coefficient, but also increases the pressure in the cylinder. This paper studies the impact of plunger pump in the best working state parameters when the piston inclination angle is 4.2 degrees to 5 degrees; port supporting complex; oil pressure is 2.5MPa; the swash plate angle is 13 DEG
Through theoretical analysis and practical conclusions and achievements, this paper provides ideas and methods for the design of the pump body structure and the way of distribution in the future.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH322

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