某内部企业知识管理培训资料课件

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,0,20 十一月 2024,1,力士乐内部企业知识管理培训资料,锥阀结构球阀结构,2,14th 15th January 2004,Bosch Rexroth in China,插装式结构：,3,14th 15th January 2004,Bosch Rexroth in China,应用举例：,直动式阀的缺陷：,大流量的场合压力波动大、稳定性差,装配调节困难,4,14th 15th January 2004,Bosch Rexroth in China,先导式溢流阀的基本原理,由直动式的缺陷而来.,液压力与弹簧力;液压力与液压力,液压半桥,5,14th 15th January 2004,Bosch Rexroth in China,先导式溢流阀的结构,6,14th 15th January 2004,Bosch Rexroth in China,7,14th 15th January 2004,Bosch Rexroth in China,泄荷阀,：,8,14th 15th January 2004,Bosch Rexroth in China,泄荷阀,的泄荷缓冲板,利用电信号泄荷响应很快，易造成系统的压力尖峰，噪音等，,为了解决上述问题，加装缓冲板，见图示,9,14th 15th January 2004,Bosch Rexroth in China,多级调压模块：,DB3U,10,14th 15th January 2004,Bosch Rexroth in China,For constant pump,For variable pump,relationship to DR-control.,Soft operation,unloading start.(,与,DBW,相同）,11,14th 15th January 2004,Bosch Rexroth in China,12,14th 15th January 2004,Bosch Rexroth in China,直动式三通减压阀的结构,13,14th 15th January 2004,Bosch Rexroth in China,应用举例,14,14th 15th January 2004,Bosch Rexroth in China,15,14th 15th January 2004,Bosch Rexroth in China,先导式减压阀的结构,(,两通式,）,16,14th 15th January 2004,Bosch Rexroth in China,先导式、滑阀结构、三通减压阀,力士乐独特设计,大通径3通减压阀,最大流量 400,l/min.,17,14th 15th January 2004,Bosch Rexroth in China,先导式、滑阀结构、三通减压阀,18,14th 15th January 2004,Bosch Rexroth in China,19,14th 15th January 2004,Bosch Rexroth in China,20,14th 15th January 2004,Bosch Rexroth in China,顺序阀,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。,与溢流阀类似，只是后接工作油路，一般控制油需外泄。,21,14th 15th January 2004,Bosch Rexroth in China,先导式顺序阀的结构,先导控制油经4.1作用于阀芯5,来改变主阀芯上腔的压力,22,14th 15th January 2004,Bosch Rexroth in China,卸荷溢流阀的结构和工作原理,先导阀一次开启通过球阀9;此时阀杆6处于力平衡状态,开启后,主阀,上腔压力下降.,二次保持通过顶杆6;此时,顶杆6一侧卸荷;顶杆6的作用面积比球阀,的作用面积大10%或17%.,23,14th 15th January 2004,Bosch Rexroth in China,24,14th 15th January 2004,Bosch Rexroth in China,25,14th 15th January 2004,Bosch Rexroth in China,26,14th 15th January 2004,Bosch Rexroth in China,流量控制阀,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）,27,14th 15th January 2004,Bosch Rexroth in China,节流阀,MG/MK630,28,14th 15th January 2004,Bosch Rexroth in China,MK-52102,29,14th 15th January 2004,Bosch Rexroth in China,节流阀,30,14th 15th January 2004,Bosch Rexroth in China,精密节流阀,F-5,10,31,14th 15th January 2004,Bosch Rexroth in China,双节流阀,32,14th 15th January 2004,Bosch Rexroth in China,调速阀:,原理:,节流调速:与负载有关,期望达到与负载无关的效果,即:如何使,p,保持恒定!,33,14th 15th January 2004,Bosch Rexroth in China,结构举例：,34,14th 15th January 2004,Bosch Rexroth in China,结构举例：,35,14th 15th January 2004,Bosch Rexroth in China,应用举例：,36,14th 15th January 2004,Bosch Rexroth in China,启动冲击：,油液压缩量,启动冲击,后果：,刀具折断,系统冲击,起始阶段的“,启动阶跃”,问题：,由于其中的,定差减压阀为常开,，所以，突然启动时，全压差作用于全开 的阀口；从,而引起“启动阶跃”效应；另外，,负载阶跃变化,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！,改善办法：,利用阀上预留的,外接平衡孔。（见回路图举例）,37,14th 15th January 2004,Bosch Rexroth in China,调速阀的启动前冲问题:,38,14th 15th January 2004,Bosch Rexroth in China,39,14th 15th January 2004,Bosch Rexroth in China,