416E Backhoe Loader Hydraulic and Steering System Caterpillar


Load Check Valve

Usage:

416E BWC

负载单向阀

闭合




图 1g01278649

处于闭合位置的负载单向阀

(1) 工作端口

(2) 单向阀

(3) 单向阀的腔室

(4) 单向阀弹簧

(5) 滑阀

(6) 油道

该阀处于正常闭合位置。 当滑阀 (5) 处于中间时,泵压力被堵住。 单向阀 (3) 的腔室通过滑阀 (5) 堵住流至油箱的通道。 腔室 (3) 中的压力升高。 堵住腔室 (3) 和通道 (6) 之间的压差保持阀落座。 弹簧 (4) 和腔室 (3) 中的压力向单向阀 (2) 施压。 这使阀保持在闭合位置。 这将防止油缸漂移。 负载单向阀将保持工作端口 (1) 中的压力,直至泵提供足够的压力至通道 (6) 以将单向阀 (2) 移离阀座。

开启




图 2g01279790

负载单向阀在泵压力作用下处于开启位置

(1) 工作端口

(2) 单向阀

(3) 单向阀的腔室

(4) 单向阀弹簧

(5) 滑阀

(6) 油道

此阀处于开启位置。 该压力来自于泵。 该压力将保持升高,直至泵形成足够的压力以克服单向阀弹簧 (4) 和腔室 (3) 中的压力。 腔室 (3) 中的机油连通油箱。 通道 (6) 中的压力克服阀弹簧 (4) 的阻力后,单向阀 (2) 将离座。 该阀 (2) 将处于开启位置。 这将允许机油绕过阀流至工作端口 (1) 。

开启




图 3g01282256

负载单向阀在工作端口压力作用下处于开启位置

(1) 工作端口

(2) 单向阀

(3) 单向阀的腔室

(4) 单向阀弹簧

(5) 滑阀

(6) 油道

此阀处于开启位置。 该压力来自工作端口 (1) 。 工作端口 (1) 形成压力。 机油流过负载单向阀 (2) 中的小孔流入通道 (6) 。 腔室 (3) 中的机油连通油箱。 通道 (6) 中的压力克服阀弹簧 (4) 的阻力后,单向阀 (2) 将离座。 该阀 (2) 将处于开启位置。 这将允许机油绕过阀流回油箱。

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