Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,*,Place holder for headline,single-line spacing (Arial 20,bold)and double-line spacing,This is a specimen text of the type that must be individually prepared for presentations,and also a bullet that needs to be adapted using the menu string Format/Bullet/Color and Symbol“.,This is a specimen text for the second bullet/list level.,This is a specimen text for the third bullet/list level.,Please keep Arial 18 pt as the font and ensure that the text is left-aligned with the business unit line.For lists,and other functions,please consult the manual.,All rights reserved by Bosch Rexroth AG,even and especially in cases of proprietary rights applications.We also retain sole power of disposal,including all rights relating to copying,transmission and dissemination.,*,*,直动式溢流阀的结构,简单,价廉,经典结构:,缓冲间隙,导向,防偏置.,偏流盘：流线型泄油口,平衡液动力.,将整个调压范围分区，采用不同刚度的调压弹簧，以使特性曲线更加理想,大流量的场合压力波动大、装配调节困难,1,14th 15th January 2004,Bosch Rexroth in China,锥阀结构,球,球阀结构,2,14th 15thJanuary 2004,Bosch Rexroth inChina,插装式结构：,3,14th 15thJanuary 2004,Bosch Rexroth inChina,应用举例：,直动式阀的缺,陷,陷：,大流量的场合,压,压力波动大、,稳,稳定性差,装配调节困难,4,14th 15thJanuary 2004,Bosch Rexroth inChina,先导式溢流阀,的,的基本原理,由直动式的缺,陷,陷而来.,液压力与弹簧,力,力;液压力与,液,液压力,液压半桥,5,14th 15thJanuary 2004,Bosch Rexroth inChina,先导式溢流阀,的,的结构,6,14th 15thJanuary 2004,Bosch Rexroth inChina,7,14th 15thJanuary 2004,Bosch Rexroth inChina,泄,荷,荷,阀,阀,：,8,14th,15thJanuary2004,BoschRexrothinChina,泄,荷,荷,阀,阀,的,的,泄,泄,荷,荷,缓,缓,冲,冲,板,板,利,用,用,电,电,信,信,号,号,泄,泄,荷,荷,响,响,应,应,很,很,快,快,，,，,易,易,造,造,成,成,系,系,统,统,的,的,压,压,力,力,尖,尖,峰,峰,，,，,噪,噪,音,音,等,等,，,，,为,了,了,解,解,决,决,上,上,述,述,问,问,题,题,，,，,加,加,装,装,缓,缓,冲,冲,板,板,，,，,见,见,图,图,示,示,9,14th,15thJanuary2004,BoschRexrothinChina,多,级,级,调,调,压,压,模,模,块,块,：,：,DB3U,10,14th,15thJanuary2004,BoschRexrothinChina,Forconstantpump,Forvariablepump,relationshiptoDR-control.,Softoperation,unloadingstart.(,与,DBW,相同）,11,14th 15th January 2004,Bosch Rexroth inChina,12,14th 15th January 2004,Bosch Rexroth inChina,直动式三通减压,阀,阀的结构,13,14th 15th January 2004,Bosch Rexroth inChina,应用举例,14,14th 15th January 2004,Bosch Rexroth inChina,15,14th 15th January 2004,Bosch Rexroth inChina,先导式减压阀的,结,结构,(,两通式,）,16,14th 15th January 2004,Bosch Rexroth inChina,先导式、滑阀结,构,构、三通减压阀,力士乐独特设计,大通径3通减压,阀,阀,最大流量 400,l/min.,17,14th 15th January 2004,Bosch Rexroth inChina,先导式、滑阀结,构,构、三通减压阀,18,14th 15th January 2004,Bosch Rexroth inChina,19,14th 15th January 2004,Bosch Rexroth inChina,20,14th 15th January 2004,Bosch Rexroth inChina,顺序阀,利用压,力,力来控,制,制油路,的,的通断,，,，相当,于,于一个,液,液控的,二,二位二,通,通的方,向,向阀。,与溢流,阀,阀类似,，,，只,是,是后接,工,工作油,路,路，一,般,般控制,油,油需外,泄,泄。,21,14th 15thJanuary 2004,Bosch RexrothinChina,先导式,顺,顺序阀,的,的结构,先导控,制,制油经4.1,作,作用于,阀,阀芯5,来,改,改变主,阀,阀芯上,腔,腔的压,力,力,22,14th 15thJanuary 2004,Bosch RexrothinChina,卸荷溢,流,流阀的,结,结构和,工,工作原,理,理,先导阀,一,一次开,启,启通过,球,球阀9;此,时,时阀杆6处于,力,力平衡,状,状态,开,开启,后,后,主,主阀,上腔压,力,力下降.,二次保,持,持通过,顶,顶杆6;此,时,时,顶,顶杆6,一,一侧卸,荷,荷;,顶,顶杆6,的,的作用,面,面积比,球,球阀,的作用,面,面积大10%,或,或17%.,23,14th 15thJanuary 2004,Bosch RexrothinChina,24,14th 15thJanuary 2004,Bosch RexrothinChina,25,14th 15thJanuary 2004,Bosch RexrothinChina,26,14th 15thJanuary 2004,Bosch RexrothinChina,流量控,制,制阀,分类：,节流阀,调速阀,分流集,流,流阀,刹车阀(平衡,阀,阀),防管路,爆,爆破阀,（,（限速,切,切断阀,）,）,27,14th 15thJanuary 2004,Bosch RexrothinChina,节流阀,MG/MK630,28,14th 15thJanuary 2004,Bosch RexrothinChina,MK-52102,29,14th 15thJanuary 2004,Bosch RexrothinChina,节流阀,30,14th 15thJanuary 2004,Bosch RexrothinChina,精密节,流,流阀,F-5,10,31,14th 15thJanuary 2004,Bosch RexrothinChina,双节流,阀,阀,32,14th 15thJanuary 2004,Bosch RexrothinChina,调速阀:,原理:,节流调,速,速:,与,与负载,有,有关,期望达,到,到与负,载,载无关,的,的效果,即:,如,如何使,p,保持恒,定,定!,33,14th 15thJanuary 2004,Bosch RexrothinChina,结构举,例,例：,34,14th 15thJanuary 2004,Bosch RexrothinChina,结构举,例,例：,35,14th 15thJanuary 2004,Bosch RexrothinChina,应用举,例,例：,36,14th 15thJanuary 2004,Bosch RexrothinChina,启动冲,击,击：,油液压,缩,缩量,启动冲,击,击,后果：,刀具折,断,断,系统冲,击,击,起始阶,段,段的“启动阶,跃,跃”问题：,由于其,中,中的定差减,压,压阀为,常,常开，所以,，,，突然,启,启动时,，,，全压,差,差作用,于,于全开,的,的阀,口,口；从,而引起,“,“启动,阶,阶跃”,效,效应；,另,另外，负载阶,跃,跃变化时，由,于,于定差,减,减压阀,响,响应滞,后,后，对,于,于性能,较,较差的,元,元件也,会,会产生,类,类似现,象,象！,改善办,法,法：利用阀,上,上预留,的,的外接平,衡,衡孔。,（,（见回,路,路图举,例,例）,37,14th 15thJanuary 2004,Bosch RexrothinChina,调速阀,的,的启动,前,前冲问,题,题:,38,14th 15thJanuary 2004,Bosch RexrothinChina,39,14th 15thJanuary 2004,Bosch RexrothinChina,40,14th 15thJanuary 2004,Bosch RexrothinChina,