双定子多输出泵在同步回路的设计

Design on Synchronous Circuit Driven by Double-stator Multi-output Pump

随着液压技术的普及,液压同步回路的应用获得了工程行业广泛的认可,但是当前最为常见的几种同步回路却存在很多弊端。如何更好地实现同步运动效果,获得更多的同步运动形式、更高的同步精度是液压同步回路设计中的重要任务。双定子多输出泵作为一种新型的液压元件,由内泵和外泵构成,既能够实现多输出,还能根据要求实现比例输出,并且内外泵之间相互独立,既能实现单独输出,也能实现联合输出。将这种新型液压元件进行回路设计,取代原有的液压同步回路设计,探究新型液压元件双定子多输出泵(简称双定子泵)在同步回路中应用的性能特点以及其驱动多液压缸同步的规律。借助液压系统的分析,设计出单作用双定子泵、双作用双定子泵的同步回路,与传统的同步回路进行比较,发现新型同步回路具有能驱动不同缸径的液压缸同步,能实现多种同步速度,具有回路功率损失少,泵的使用个数少,同步精度高等优点;用已加工出的双定子泵样机组成同步回路进行实验,结果表明其确实能够达到较高的同步精度,并且发现影响新型同步回路同步精度的主要因素为双定子泵的内部泄露。因此,应用双定子多输出泵能消除当前液压回路中的一些问题,为同步回路提供了一个新的研究方向,为双定子液压元件的应用奠定了理论研究基础。

With the popularization of hydraulic technology,the application of synchronous hydraulic circuit for engineering industry has been widely recognized. Now there has appeared several kinds of circuit,but all the circuit performed badly. So how to realize a synchronization effect,to get more moving modes,and to get higher precision has become a very important task for design of synchronous hydraulic circuit. As a new type of hydraulic components,Double stator output pump is composed of inner pump and outer pump,which can realize the function of multi output,and can realize proportional output according to the requirements. It＇s inner and outer pump are mutually independent,so it can work alone and also can realize the joint output. By using this new type of hydraulic components for circuit design,making the original hydraulic synchronous circuit be replaced,the characteristics of synchronous circuit driven by double-stator multi-output pump（ referred to as double-stator pump） was explored,and the laws of multi-cylinder hydraulic synchronous system driven by it was studied. Based on the analysis of the hydraulic system,the synchronous circuit of single double stator pump and double pump stator were designed. The comparison with the traditional synchronous circuit showed that the new synchronous circuits can achieve the hydraulic cylinder synchronization of different sizes,and have multiple synchronous speeds,in addition,it has the advantages of less power loss and using fewer numbers of pumps. The experimental data of a prototype of double-stator pump with the synchronous system showed that the main factor influencing the synchronous precision of the new synchronous circuit is the volumetric efficiency of the double-stator pump. The application of double stator multi output pump can effectively eliminate some of the current problems in the hydraulic circuit,which provides a new research direction for the synchronous circuit and provides the theoretical foundation for the research of application of double stator hydraulic components.