IC200CHS012
IC200CHS012
IC200CHS012
IC200CHS012
油液刚度不稳定，特别是液压系统中混入一定的空气，空气的可压缩性使油液也具有一定的可压缩性，从而导致油液刚度减小。油液刚度愈大，产生爬行的可能性就愈小，在其他条件不变的情况下，一切使油液刚度变小的因素，都会产生爬行。
液压缸制造和使用不当也造成爬行。
（2）爬行的原因
爬行是液压系统常见的问题。引起爬行的直接原因有：
油内混入空气，引起执行件动作迟慢，反应滞后。
压力调得过低，或调不高，或漂移下降．当负载加上各种阻力的总和与液压力大致相当时，执行元件表现为似动非动。
系统内压力与流量过大的波动引起执行元件运动不均。
液压系统磨严重，工作压力增高则引内泄漏显著增大。执行件在未带负载时运动速度正常，一旦带上负载，速度立即下降。例如，平面磨床的主工作台在工件未碰到磨头时运动速度正常，一旦碰到磨头，速度变得非常慢就属于这类问题。
导轨与液压缸运动方向不平行，或导轨拉毛，润滑条件差，阻力大，使液压缸运动困难且不稳定。
电路失常也会引执行元件运动状态不良。例如，当行程开关接触不良时，供给电磁铁的电信号也可能是断断续续的，由此引起换向阀不能可靠地开启，并使执行元件的运动不稳定。
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