基于SVR的轴向柱塞泵配流盘三角槽结构优化

doi:10.13229/j.cnki.jdxbgxb20200347

摘要/Abstract

摘要：

为优化轴向柱塞泵的输出动态特性，提出了一种基于支持向量回归机（SVR）的柱塞泵配流盘三角槽结构优化方法。首先，根据轴向柱塞泵的工作原理对其输出特性进行建模，并通过试验对仿真模型的准确性和可行性进行验证，试验与仿真结果误差约为0.31%，理论模型与试验具有较好的一致性。然后，通过计算获取不同配流盘三角槽结构条件下的样本数据，基于SVR模型找出柱塞泵出口流量脉动与三角槽的深度角、宽度角间的对应关系，计算得到深度角与宽度角的最优解分别为11.2°和51.7°。最后，在相同工况条件下，将三角槽结构优化前和优化后计算结果进行对比分析，结果显示，柱塞泵优化后的流量脉动相比优化前降低了1.87%，为制作新产品缩短了研发周期和成本。

关键词: 流体传动与控制, 轴向柱塞泵, 流量脉动, 三角槽, 支持向量回归, 参数优化

Abstract:

In order to optimize the outlet dynamic characteristics of the axial piston pump, a method based on support vector regression machine (SVR) is proposed to optimize the triangular groove of the valve plate. First, the outlet characteristics of the axial piston pump are modeled. The accuracy and feasibility of the simulation model are verified through experiments. The error between the experiment and simulation results is 0.31%, which proves that the theoretical model is in good agreement with the test. Second, the sample data under different conditions of triangular groove structures are obtained through simulation. Based on the SVR model, the corresponding relationship between the outlet flow pulsation and the depth and width angles was found out, and the optimal solutions of the depth and width angles are obtained as 11.2° and 51.7° respectively. Finally, under the same working condition, the optimized calculation results of the triangular groove structure are compared and analyzed. The results show that the flow pulsation after the optimization of the pump is 1.87% lower than that before the optimization, so as to shorten the development cycle and cost of new product.

Key words: turn and control of fluid, axial piston pump, flow pulsation, triangle groove, support vector regression（SVR）, parameter optimization

中图分类号:

TH322

张斌,程国赞,洪昊岑,赵春晓,白大鹏,杨华勇. 基于SVR的轴向柱塞泵配流盘三角槽结构优化[J]. 吉林大学学报(工学版), 2021, 51(4): 1213-1221.

Bin ZHANG,Guo-zan CHENG,Hao-cen HONG,Chun-xiao ZHAO,Da-peng BAI,Hua-yong YANG. Structure optimization of triangular groove of valve plate in axial piston pump based on SVR[J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1213-1221.

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基本参数	数值	单位
最高压力	35	MPa
额定压力	28	MPa
额定转速	1500	r/min
理论流量	106.5	L/min
排量	71	mL
配流盘腰形槽包角	134	°
柱塞腔出口槽包角	29	°
腰型槽弧段包角	6	°
配流盘错配角	1.5	°
斜盘倾角	17.23	°
柱塞直径	20	mm
配流盘内封油内半径	28.6	mm
配流盘内封油外半径	36.5	mm
配流盘外封油内半径	44.5	mm
配流盘外封油外半径	52.5	mm
柱塞个数	9	-
节流系数	0.74	-
油液密度	876	kg/m³
油液黏性	0.048	kg/（m·s）
油液体积弹性模量	1.7×10⁹	Pa
泵工作转速	1300	r/min
泵的容积效率	0.972	-

	深度角/（°）	宽度角/（°）	流量脉动率/%
优化前	14.0	60.0	15.79
优化后	11.2	51.7	13.92