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SL10PA1-4X液控单向阀 德国博世力士乐REXROTH液压阀 液控单向阀 原装现货

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SL10PA1-4X液控单向阀

主要特点

(1)保持压力。

滑阀式换向阀都有间隙泄漏现象，只能短时间保压。当有保压要求时，可在油路上加一个液控单向阀，利用锥阀关闭的严密性，使油路长时间保压。

(2)液压缸的“支承”。

在立式液压缸中，由于滑阀和管的泄漏，在活塞和活塞杆的重力下，可能引起活塞和活塞杆下滑。将液控单向阀接于液压缸下腔的油路，则可防止液压缸活塞和滑块等活动部分下滑。

(3)实现液压缸锁紧。

当换向阀处于中位时，两个液控单向阀关闭，可严密封闭液压缸两腔的油液，这时活塞就不能因外力作用而产生移动。

(4)大流量排油。

液压缸两腔的有效工作面积相差很大。在活塞退回时，液压缸右腔排油量骤然加大，此时若采用小流量的滑阀，会产生节流作用，限制活塞的后退速度；若加设液控单向阀，在液压缸活塞后退时，控制压力油将液控单向阀打开，便可以顺利地将右腔油液排出。

(5)作充油阀。

立式液压缸的活塞在高速下降过程中，因高压油和自重的作用，致使下降迅速，产生吸空和负压，必须增设补油装置。液控单向阀作为充油阀使用，以完成补油功能。

(6)组合成换向阀。

在设计液压回路时，有时可将液控单向阀组合成换向阀使用。例如：用两个液控单向阀和一个单向阀并联（单向阀居中），则相当于一个三位三通换向阀的换向回路。需要指出，控制压力油油口不工作时，应使其通回油箱，否则控制活塞难以复位，单向阀反向不能截止液流。

液控单向阀是依靠控制流体压力，可以使单向阀反向流通的阀。这种阀在煤矿机械的液压支护设备中占有较重要的地位。液控单向阀与普通单向阀不同之处是多了一个控制油路K，当控制油路未接通压力油液时，液控单向阀就象普通单向阀一样工作，压力油只从进油口流向出油口，不能反向流动。当控制油路有控制压力输入时，活塞顶杆在压力油作用下向右移动，用顶杆顶开单向阀，使进出油口接通。若出油口大于进油口就能使油液反向流动。

SL10PA1-4X液控单向阀

型号SV和SL阀是锥阀结构的液控单向阀，它可在关闭方向开启而让油液自由流动。

此类阀用于有液压回路部分的隔离，当管路破裂时，作为防止负载失压的安全措施，或避免执行器在液压闭锁时的爬行或漂移。

其组成主要包括阀体、阀芯 、压缩弹簧和控制活塞和一个可选的释压球阀。

型号SV...

油液可以由A至B自由流动。在相反方向，阀芯被压缩弹簧和系统压力牢固的保持在其阀座上。

通过向控制口X提供压力，控制活塞被推向右侧。这样阀芯离开阀座，油液由B至A流动。

为了确保阀开启，需要一定的低控制压力作用于控制活塞上

为了确保通过施加到控制阀芯上压力阀能打开，要求一定的小先导压力

型号SV..A..和SL..A.. (带卸压功能，)

该阀有一个附加的印载机构，当向X口提供控制压力时，控制活塞被推向右侧。它首先推开球阀芯，然后主阀芯离开其阀座。这样，油液从B流向A,从而避免可能的压力冲击。

由于这种预开启特征，可以实现缸中受压液体的平稳释压。

型号SL..

此阀的功能与SV型相同。

不同之处在于增加了泄油口Y。此处控制活塞 的环形面积与A口隔离。来自A口的压力只作用于控制活塞 的面积A_上。

SL10PA1-4X液控单向阀型号

力士乐REXROTH液控单向阀SV 6

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力士乐液控单向阀SV 10...32

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力士乐REXROTH液控单向阀SL 6

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