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武汉耀泰机电设备有限公司
联系人：王经理
手机号：15387038738
电话：027-87780928
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您好，我公司主要经营：力士乐、万福乐、威格士、ATOS、派克等品牌的液压阀、泵、油缸；以及ASCO、SMC、费斯托等产品的气动阀、气缸。没有详细列出所有型号，如有需要，欢迎来电咨询！
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1、困油现象及危害
困油现象是液压泵存在的一种普遍的非常有害的现象困油现象发生的必要条件是存在
困油容积(也称为封闭容积)。所谓困油容积是指一种包答着液体的、封闭起来的、与外界
不直接相通的答腔o在液压泵和夜压马达上,困油容积通常出现在进油腔与排油腔之间的过
渡区间。当困油容积的大小发生变化时，由于液体的压缩性与膨胀性极小，必将引|起困油容
积内液体压力的急剧变化，造成破坏。
由机械设计学可知，为了保证啮合的齿轮平稳的工作，齿轮啮合的重叠系数必须大于1
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