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1.前言如同在许多机器制造领域一样,液压传动用于船用起货机的重要性也日益增长。今天,由于它已经达到较高的发展阶段,所以,能够满足起货机工作高度可靠的要求。目前,除了广泛运用无级的华特利纳变速器,即采用直流发电机的电动机变速器和有级变速变极电动机直接进行传动外,起货机液压传动也具有同等的价值。与以上两种电力传动相比较,液压传动具有价廉的优点,即:主要是
1. Introduction As in many machine building applications, the importance of hydraulics for marine cranes is also on the rise. Today, because it has reached a higher stage of development, it is able to meet the highly reliable requirements of the cargo handling machine. Currently, in addition to the widely used stepless Waltling transmission, which uses a direct current generator motor transmission and a step-change variable pole motor direct drive, the hydraulic winch also has the same value. Compared with the above two kinds of power transmission, hydraulic transmission has the advantages of cheap, namely: mainly