Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (4): 1213-1221.doi: 10.13229/j.cnki.jdxbgxb20200347

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Structure optimization of triangular groove of valve plate in axial piston pump based on SVR

Bin ZHANG(),Guo-zan CHENG,Hao-cen HONG(),Chun-xiao ZHAO,Da-peng BAI,Hua-yong YANG   

  1. State Key Laboratory of Fluid Power Transmission and Control，Zhejiang University，Hangzhou 310027，China
  • Received:2020-05-12 Online:2021-07-01 Published:2021-07-14
  • Contact: Hao-cen HONG E-mail:zbzju@zju.edu.cn;honghaocen@163.com

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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

CLC Number: 

  • TH322

Fig.1

Movement relation of axial piston pump"

Fig.2

Structure of valve plate"

Fig.3

Single plunger theoretical fluid model"

Fig.4

Structure of simulation program"

Fig.5

Pump-pipeline-valve hydraulic system"

Fig.6

Structure of test system in the whole pump model"

Fig.7

3D model of experiment［14］"

Fig.8

Experiment table of the axial piston pump［14］"

Fig.9

Simulation and test curves of outlet pressure in the axial piston pump"

Fig.10

Simulation and test curves of outlet flow in the axial piston pump"

Fig.11

Structure of support vector regression machine"

Fig.12

Main ideas of support vector regression machine"

Table 1

Basic parameters of L10V71 axial piston pump"

基本参数数值单位
最高压力35MPa
额定压力28MPa
额定转速1500r/min
理论流量106.5L/min
排量71mL
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20mm
配流盘内封油内半径28.6mm
配流盘内封油外半径36.5mm
配流盘外封油内半径44.5mm
配流盘外封油外半径52.5mm
柱塞个数9-
节流系数0.74-
油液密度876kg/m3
油液黏性0.048kg/（m·s）
油液体积弹性模量1.7×109Pa
泵工作转速1300r/min
泵的容积效率0.972-

Fig.13

Variation of pump outlet flow in different width-angle （when depth-angle is 14°）"

Fig.14

Pump outlet pulsation in different width-angle （when depth-angle is 14°）"

Fig.15

Variation of pump outlet flow in different depth- angle （when width-angle is 60°）"

Fig.16

Pump outlet pulsation in different depth-angle （when width-angle is 60°）"

Fig.17

Optimization process of depth-angle and width-angle"

Fig.18

Comparison of real value and model value"

Fig.19

Results of model optimization"

Fig.20

Comparison curves of initial structure and optimized results"

Table 2

Optimum solutions"

深度角/（°）宽度角/（°）流量脉动率/%
优化前14.060.015.79
优化后11.251.713.92
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