比例型多泵多速马达传动系统设计与试验

为了解决目前广泛应用的液压传动输出特性单一等问题,基于比例型多泵和多速马达提出了比例型多泵多速马达传动理论。在阐述比例型多泵/多速马达结构和工作原理的基础上,设计了2种比例型多泵多速马达传动系统,并对其在不同工作方式下的输出特性进行了理论分析,且进一步探讨了多泵和多速马达排量比例系数对传动系统的影响。通过对比例型多泵多速马达传动系统的输出特性的理论拓展,得到该液压传动系统在不同工作方式下输出转速和转矩的一般公式,并搭建比例型多泵多速马达传动系统试验平台。试验结果表明:比例型多泵多速马达通过切换多泵和多速马达的工作方式,可输出多级定转速和定转矩,且各级转速和转矩与排量比例系数相关。该研究为比例型多泵多速马达传动系统的设计和应用奠定了基础。

Design and Experiment of Proportional Type Multi-pump and Multi-speed Motor Driving System

In order to solve the problem that the widely used hydraulic driving system only can output one characteristic, a theory of proportional type multi-pump and multi-speed motor driving system was presented based on proportional type of multi-pump and multi-speed motor. Multi-pump can output multi flows, to work in different pressures without a reducing valve, and multi-speed motor can output multi speeds and torques. Two proportional type multi-pump and multi-speed motor driving systems were designed based on describing the structure and working principle of the multi-pump and multi-speed motor, and the features of the two new driving system were introduced, the output characteristics of the two driving system in different working ways were analyzed theoretically, the effects of the displacement coefficient on the driving system were also discussed. The outputting speeds and torques of the new hydraulic driving system in different working ways were obtained through expanding the output characteristic of this system. The experimental platform of proportional type multi-pump and multi-speed motor driving system was built. The result showed that this driving system can output multi speeds and torques through controlling the working ways of the multi-pump and multi-speed motor, and each level of speeds and torques was related to the displacement coefficient. The research on the proportional type multi-pump and multi-speed motor driving system established a basis for its design and application.