德国（REXROTH）双活塞气缸%道窖BOSCH塑料软管

德国（REXROTH）双活塞气缸活塞杆端部的拉钩间有一空行程s1，实现空程快速趋近，然后再带动液压缸活塞，通过节流阻尼，实现慢进。返程时也是先走空行程s1，再与液压活塞一起运动，通过单向阀，实现快退。
表42.2-3气-液阻尼缸调速特性及应用 调速方式 结构示意图 特性曲线 作用原理 应用
双向节流调速在气-液阻尼缸的回油管路装设可调式节流阀，使活塞往复运动的速度可调并相同适用于空行程及工作行程都较短的场合（s＜20mm）
单向节流调速将一单向阀和一节流阀并联在调速油路中。活塞向右运动时，单向阀关闭，节流慢进；活塞向左运动时，单向阀打开，不经节流快退。适用于空行程较短而工作行程较长的场合
快速趋近单
向节流调速将液压缸的?点与α点用管路相通，活塞开始向右运动时，右腔油经由fgea回路直接流入α端实现快速趋近，当活塞移过?点，油只能经节流阀流入α端，实现慢进，活塞向左运动时，单向阀打开，实现快退。由于快速趋近，节省了空程时间，提高了劳动生产率。

德国（REXROTH）双活塞气缸分普通型和快排型两种。
1）普通型冲击气缸普通型冲击气缸的结构见图42.2-10。与普通气缸相比，此种冲击气缸增设了蓄气缸1和带流线型喷气口4及具有排气孔3的中盖2。其工作原理及工作过程可简述为如下五个阶段（见图42.2-11）：
*阶段：复位段。见图42.2-10和图42.2-11a，接通气源，换向阀处复位状态，孔A进气，孔B排气，活塞5在压差的作用下，克服密封阻力及运动部件重量而上移，借助活塞上的密封胶垫封住中盖上的喷气口4。中盖和活塞之间的环形空间C经过排气小孔3与大气相通。zui后，活塞有杆腔压力升高至气源压力，蓄气缸内压力降至大气压力。
第二阶段：储能段。见图42.2-10和图42.2-11b，换向阀换向，B孔进气充入蓄气缸腔内，A孔排气。由于蓄气缸腔内压力作用在活塞上的面积只是喷气口4的面积，它比有杆腔压力作用在活塞上的面积要小得多，故只有待蓄气缸内压力上升，有杆腔压力下降，直到下列力平衡方程成立时，活塞才开始移动。
式中 d??中盖喷气口直径（m）；

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R900888536 REPARATURSATZ PGF1-2X/3,2...
R900888535 REPARATURSATZ PGF1-2X/2,8...
R900888534 REPARATURSATZ PGF1-2X/2,2...
R900888529 REPARATURSATZ PGF1-2X/1,7...
R900887490 DICHTUNGSSATZ PGF1-2X/..V