R900344369 ZDC25P-2X/M力士乐进口节流压力补偿器

压力补偿器的概念正是为实现负载流量恒定而提出的。在无法预知或掌握负载变化规律的情况下，保持节流阀前后的压差恒定，以实现通流量的恒定，该元件或功能组合就称为压力补偿器。

说压力补偿器，就得先说一下定差减压阀，它是使阀的进口压力与出口压力之间的差值近于恒定的一种减压阀，它不管进口压力如何变化，总保持以恒定的压力差值向外出油。关于该阀的工作原理在文献1中有较为详细的描述。在实际使用中我们很少见到单独使用的定差减压阀，它一般与节流阀或单向阀并联组合成惯用的调速阀或单向减压阀，从文献1调速阀与节流阀的比较中可以看出，使用了定差减压阀的回路，流量控制稳定性较好。由此可以看出欧美液压领域额将定差减压阀译为压力补偿器主要是更关注它的压力补偿功能（定压差功能确保阀所感受的两端压力差不会随负载压力的变化而变化）而言，实践证明，该阀在流量控制时效果明显，以使阀的流量不受负载压力/阀的进口压力影响。这里所谓的“压力补偿”是通过自我调节以维持两个感受端的压差恒定，而不是该阀可以补偿压力，实际上所有的介质流经阀体均会产生能量消耗（消耗压力），从这个概念上讲“压力补偿阀”是“压力差补偿阀”的简称。

力士乐REXROTH进口节流压力补偿器，直动式ZDC 10...32

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力士乐REXROTH叠加式出口节流压力补偿器SCA 16, SCA 25

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