内部培训课件2.pptx

1、2022年8月1日星期一力士乐内部培训资料力士乐内部培训资料2锥阀结构球阀结构14th 15th January 2004,Bosch Rexroth in China插装式结构：插装式结构：14th 15th January 2004,Bosch Rexroth in China应用举例：应用举例：直动式阀的缺陷：直动式阀的缺陷：大流量的场合压大流量的场合压力波动大、稳定力波动大、稳定性差性差装配调节困难装配调节困难Axxkpp)(14th 15th January 2004,Bosch Rexroth in China先导式溢流阀的基本原理先导式溢流阀的基本原理4由直动式的缺陷而来.4液压

2、力与弹簧力;液压力与液压力4液压半桥14th 15th January 2004,Bosch Rexroth in China先导式溢流阀的结构先导式溢流阀的结构14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China泄荷阀泄荷阀：14th 15th January 2004,Bosch Rexroth in China泄荷阀泄荷阀的泄荷缓冲板的泄荷缓冲板4利用电信号泄荷响应很快，易造成系统的压力尖峰，噪音等，4为了解决上述问题，加装缓冲板，见图示14th 15th Ja

3、nuary 2004,Bosch Rexroth in China多级调压模块：多级调压模块：DB3UDB3U14th 15th January 2004,Bosch Rexroth in ChinaFor constant pump For variable pump,relationship to DR-control.Soft operation,unloading start.(与与DBW相同）相同）14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China直动式三

4、通减压阀的结构直动式三通减压阀的结构14th 15th January 2004,Bosch Rexroth in China应用举例应用举例14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China先导式减压阀的结构先导式减压阀的结构(两通式两通式）14th 15th January 2004,Bosch Rexroth in China先导式、滑阀结构、三通减压阀先导式、滑阀结构、三通减压阀力士乐独特设计力士乐独特设计大通径大通径3通减压阀通减压阀最大流量最大流量 40

5、0l/min.14th 15th January 2004,Bosch Rexroth in China先导式、滑阀结构、三通减压阀先导式、滑阀结构、三通减压阀14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China顺序阀顺序阀4利用压力来控制油路的通断，相当于一个液控的二位二通的方向阀。4与溢流阀类似，只是后接工作油路，一般控制油需外泄。14th 15th January 2004

6、,Bosch Rexroth in China先导式顺序阀的结构先导式顺序阀的结构先导控制油经先导控制油经4.1作用于阀芯作用于阀芯5,来改变主阀芯上腔的压力来改变主阀芯上腔的压力14th 15th January 2004,Bosch Rexroth in China卸荷溢流阀的结构和工作原理卸荷溢流阀的结构和工作原理v先导阀一次开启通过球阀先导阀一次开启通过球阀9;此时阀杆此时阀杆6处于力平衡状态处于力平衡状态,开启后开启后,主阀主阀 上腔压力下降上腔压力下降.v 二次保持通过顶杆二次保持通过顶杆6;此时此时,顶杆顶杆6一侧卸荷一侧卸荷;顶杆顶杆6的作用面积比球阀的作用面积比球阀 的作用面

7、积大的作用面积大10%或或17%.14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China流量控制阀流量控制阀4分类：节流阀 调速阀 分流集流阀 刹车阀(平衡阀)防管路爆破阀（限速切断阀）14th 15th January 2004,Bosch Rexroth in China节流阀节流阀MG/

8、MK63014th 15th January 2004,Bosch Rexroth in ChinaMK-5210214th 15th January 2004,Bosch Rexroth in China节流阀节流阀14th 15th January 2004,Bosch Rexroth in China精密节流阀精密节流阀 F-5F-51010 14th 15th January 2004,Bosch Rexroth in China双节流阀双节流阀14th 15th January 2004,Bosch Rexroth in China调速阀调速阀:4原理:节流调速:与负载有关,期望达到

9、与负载无关的效果,即:如何使 p 保持恒定!ApaKAQmtAFpFAppFApApkFFkFkktancos)(323214th 15th January 2004,Bosch Rexroth in China结构举例：结构举例：14th 15th January 2004,Bosch Rexroth in China结构举例：结构举例：14th 15th January 2004,Bosch Rexroth in China应用举例：应用举例：14th 15th January 2004,Bosch Rexroth in China启动冲击：启动冲击：21xxx油液压缩量油液压缩量 启动冲

10、击启动冲击后果：后果：刀具折断刀具折断 系统冲击系统冲击起始阶段的起始阶段的“启动阶跃启动阶跃”问题：问题：由于其中的由于其中的定差减压阀为常开定差减压阀为常开，所以，突，所以，突然启动时，全压差作用于全开然启动时，全压差作用于全开 的阀口；从的阀口；从而引起而引起“启动阶跃启动阶跃”效应；另外，效应；另外，负载阶负载阶跃变化跃变化时，由于定差减压阀响应滞后，对时，由于定差减压阀响应滞后，对于性能较差的元件也会产生类似现象！于性能较差的元件也会产生类似现象！改善办法：改善办法：利用阀上预留的利用阀上预留的外接平衡孔。外接平衡孔。（见回路图举例）（见回路图举例）14th 15th January 2004,Bosch Rexroth in China调速阀的启动前冲问题调速阀的启动前冲问题:14th 15th January 2004,Bosch Rexroth in China14th 15th January 2004,Bosch Rexroth in China