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Position: Home > Articles > Semi-empirical Parametric Modeling for Efficiency Characteristics of Axial Piston Pump Transactions of the Chinese Society for Agricultural Machinery 2016,47 (7) 382-390

轴向柱塞泵效率特性半经验参数化建模方法

作  者：
许睿;谷立臣
单  位：
西安建筑科技大学机械电子技术研究所
关键词：
轴向柱塞泵;效率特性;半经验参数化模型;参数识别
摘  要：
针对轴向柱塞泵效率特性机理分析不够深入、全工况下机理模型精度差,提出一种基于力学正反问题的柱塞泵效率特性半经验参数化建模方法。首先考虑油液可压缩性导致的容积损失和倾覆力矩作用下形成的柱塞副库伦摩擦力,建立了流量、转矩损失机理模型;然后分析了系统参数非线性变化规律,在此基础上利用试验数据拟合机理模型中复合参数经验公式;最后导出柱塞泵效率特性半经验参数化模型。对比分析表明:复合参数经验公式显著提高了机理模型精度,流量、转矩损失半经验参数化模型平均相对误差分别为3%和1%。结果分析表明:复合参数以及对应损耗能量比重直观反映了柱塞泵效率特性,极限工况下柱塞泵效率下降以及容积效率和机械效率无法再次提升的根本原因在于油液有效体积弹性模量、库伦摩擦因数等系统参数的急剧变化。
译  名：
Semi-empirical Parametric Modeling for Efficiency Characteristics of Axial Piston Pump
作  者：
Xu Rui;Gu Lichen;Institute of Mechanical and Electronic Technology,Xi'an University of Architecture and Technology;
关键词：
axial piston pump;;efficiency characteristic;;semi-empirical parametric model;;parameter identification
摘  要：
In order to reveal the efficiency characteristics of axial piston pump and improve the accuracy of efficiency characteristics mechanism model under the whole working conditions,a semi-empirical parametric modeling method based on mechanical forward and backward inference for piston pump efficiency characteristics was proposed. Considering the volume loss caused by oil compressibility and the piston pair coulomb's friction formed by overturning moment,the flow and torque loss mechanism models were established. Then the nonlinear changing regularity of system parameters contained in the composite parameters of mechanism models was analyzed and the composite parameters empirical formulas were fitted based on measurement data. The piston pump efficiency characteristics semi-empirical parametric model was obtained. The results show that average flow and torque loss estimation error are respectively within 3% and 1% over wide operating ranges of speed 500 ~ 3 000 r / min and pressure 2 ~ 24 MPa.Composite parameters and corresponding loss energy proportion reflect the efficiency characteristics of piston pump directly. The rapid changes of system parameters,such as oil effective volume elastic modulus and coulomb's friction coefficient,are the fundamental reasons of volumetric efficiency and mechanical efficiency unable to upgrade again and the piston pump efficiency decreased under extreme conditions. The models established in this paper can be used to investigate energy-saving optimization design,performance evaluation,performance degradation and failure mechanism analysis of piston pump deeply and realistically.

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