柱塞泵过分发热有两个缘故原由，一是机器摩擦生热。由于活动外貌处于干摩擦或半干摩擦状态，活动部件相互摩擦生热。二是液体摩擦生热。高压油通过种种漏洞走漏到低压腔，大量的液压能丧失转为热能。以是准确选择活动部件之间的间隙、油箱容积和冷却器，可以杜绝泵的过分发热和油温过高的征象。别的，回油过滤器堵塞造成回油背压过高，也会引起油温过高和泵体过热。
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德国原厂出售Rexroth力士乐齿轮泵
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