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A10VSO28DFR/31R-PSA12N00 力士乐Rexroth双联叶片泵
详细说明销售德国原装进口力士乐液压元件及液压系统设计。主要经营产品有力士乐油泵、力士乐柱塞泵、力士乐叶片泵、REXROTH油泵、REXROTH柱塞泵、REXROTH叶片泵等系列产品。欢迎新老客户来电来函咨询洽谈！
-力士乐油泵概述
力士乐油泵是液压系统的动力机构，它将原动机（电动机、内燃机等）的机械能转变为液体的压力能。
力士乐油泵可以分为容积式和非容积室（蜗轮式）两种。
非容积式有离心泵、轴流泵等，利用高速旋转的叶轮使进口产生真空吸入液体，并在出口连续输出压力液体。这种泵进口与出口相通，效率随液体粘度增加而降低，并且输出液体量随出口压力升高而显著减少。 ??
容积式泵是通过一个封闭的空间容积的变化来实现吸油和压油的。当这个封闭容积由小变大时进行吸油，由大变小时进行压油。典型的为力士乐柱塞泵，柱塞从缸孔中拉出时吸油，压进时压油。这种泵进口与出口是被隔开的，效率取决于隔开吸压油腔的各对运动零件间的结构工艺间隙及油液的粘度等。粘度越高效率越高，输油量几乎保持不变（因效率略有影响，另外压力升高至18MPa，油液会被压缩1%）。
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进入各执行元件的流量只是液压泵输出流量的一部分
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A10VSO28DFR/31R-PSA12N00 力士乐Rexroth双联叶片泵
为了选用正确的液压油，必须知道邮箱中的油液工作温度（开式回路）和环境的温度的关系。
必须选择液压油液，以保证在工作温度范围内油液的工作粘度处于范围（Vopt）(件选择图的阴影部分)。建议在每种场合均选用尽可能高的粘度等级。
示例：在X℃的环境温度下，工作油液温度为60℃。
在工作粘度范围（Vopt；阴影部分）内对应有VG46或VG68。应选VG68。
注意：泄漏油（壳体泄油）温度受泵的压力和转速的影响并总是高于邮油温。然而，系统任何地方的温度不得超过90℃。
油液的过滤
油滤越精细工作液体的清洁度越好，则轴向柱塞泵的寿命越长。
为了保证轴向柱塞元件的正常功能，需要油液的清洁度至少为
NAS1638，9级
ISO/DIS 4406的18/15
机械排量限制器
机械排量限制器仅用不通轴12/62NOO系列柱塞泵，可实现排量从50%←→任意调节
工作压力范围-——进油侧
S口（进口）的压力
Pabs min 0.08Mpa
Pabs min 3Mpa
工作压力范围-——出口侧
在B口的压力
额定压力PN 28Mpa
峰值压力Pmax 35Mpa
间歇工作在负载时间为10%时，压力可达31.5Mpa
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