双斜盘多排式轴向柱塞马达转矩特性分析  

Output Torque Characteristics Analysis of Double Swash Plate Multi-row Axial Piston Motor

作　　者：闻德生[1] 孙立杰 席冰 杜飞 李德雄 赵国强 WEN Desheng;SUN Lijie;XI Bing;DU Fei;LI Dexiong;ZHAO Guoqiang(College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;College of Art and Design,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学机械工程学院,秦皇岛066004 [2]燕山大学艺术与设计学院,秦皇岛066004

出　　处：《农业机械学报》2020年第6期420-426,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(50975246)。

摘　　要：为了实现多级转速和转矩的输出,轴向柱塞马达必须使用节流阀、减压阀等耗能元件来改变输入压力和流量,但同时降低了效率。新型双斜盘多排式轴向柱塞马达可以利用其结构的特殊性,实现输出转矩的多样性。本文基于双斜盘多排式轴向柱塞马达的结构特点及工作原理,推导了该马达在不同工作方式下的理论瞬时转矩和转矩不均匀系数,并通过Matlab分析了内外马达转矩系数比对转矩不均匀系数的影响,设计了马达的实验液压系统并搭建了实验平台,对马达进行了原理性实验,并进行了数据分析。实验结果表明,在额定压力和额定排量下,该马达能实现多种不同的转速与转矩输出,随着内外马达转矩系数比的增大,低速大转矩的转矩不均匀系数越小,高速低转矩不稳定系数越大,通过合理设计可以实现马达在不同工作状态下的稳定运行,验证了新型马达在结构原理上的可行性,为新型轴向柱塞马达的改进设计提供了实验依据。Hydraulic transmission is widely used in aerospace,engineering machinery,agricultural machinery and other industries due to its large power-to-mass ratio,flexible control,and convenient speed control.Hydraulic motors are an important actuator,which determined the working capacity of the entire hydraulic system.In the existing axial piston motor,in order to realize multi-stage speed and torque output,energy-consuming components such as throttle valve and pressure reducing valve must be used to change the input pressure and flow rate,thereby reducing the efficiency.The new double swash plate multi-row axial piston motor can utilize the special characteristics of its structure to achieve a variety of output torque.The structural characteristics and working principle of the motor were introduced.The theoretical instantaneous torque and torque non-uniformity coefficient of the motor under different working modes were derived.The effects of torque coefficient of the internal and external motor on torque non-uniformity coefficient was compared by Matlab.The experimental hydraulic system of the motor was designed and the construction of the experimental platform was completed,the principle experiment on the motor was carried out and the data was analyzed.The results showed that the motor can realize different speed and torque output under the rated pressure and rated displacement of the motor.As the torque coefficient ratio of the inner and outer motors were increased,the torque unevenness coefficient of the low speed and large torque was small,and the speed was high.The higher the low torque instability coefficient was,the better the design of the motor can achieve stable operation under different working conditions,verifying the feasibility of the new structure motor in principle,and providing an experimental basis for the improved design of the new axial piston motor.

关 键 词：双斜盘 多排式 轴向柱塞马达 转矩脉动 不均匀系数 

分 类 号：TH137[机械工程—机械制造及自动化]