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前言本文摘译自西德H.P.Riedel博士的论文“比例阀在液压传动电梯上的应用”。文中介绍了液压传动电梯的优缺点和电梯液压控制系统的要求,分析了影响液压传动电梯运行状态的因素。并介绍了液压传动电梯中使用的一种新结构的比例流量调节阀,它是专门为电梯的特殊条件而研制的,从而使液压电梯的性能和自动控制程度有了很大的提高。因此液压电梯近年来有了急骤增长。现在它的销售量在西德约为35%,而在斯堪的
Preface This paper is an excerpt from a treatise by Dr. H. P. Riedel, West Germany, “Proportional Valves for Hydraulic Drive Elevators.” In this paper, the advantages and disadvantages of hydraulic transmission elevator and the requirements of elevator hydraulic control system are introduced. The factors affecting the operation status of hydraulic transmission elevator are analyzed. A new proportional flow control valve used in hydraulic transmission is introduced. It is developed specifically for the special condition of the elevator, so that the performance and automatic control of the hydraulic elevator have been greatly improved. Therefore, the hydraulic elevator has experienced a sharp increase in recent years. It now sells for about 35% of West Germany, while in Scandinavia