博士力士乐工程机械液压培训中文版课件.ppt

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1、常开式常闭式114th–15thJanuary2004,BoschRexrothinChina214th–15thJanuary2004,BoschRexrothinChina314th–15thJanuary2004,BoschRexrothinChina4WRD(E)5XNG10,16,25,32,35Qmax3000l/min4/3RVNG10,16,25,32Qmax3500l/min4WRLE(H)NG6/10Qmax180l/min4WRA(E)2XNG6/10Qmax75l/min4WRE(E)2XNG6/10Qmax180l/min4WRZ(E)7XNG10,

2、16,25,32,52Qmax2800l/min4WRK(E)2XNG10,16,25,32,35Qmax3000l/minProportionalValvesHighResponseControlValves4WS(E)2EM5XNG10QN90l/min(beipv70bar)4WSE3EENG16,25,32QN850l/min(beipv70bar)4WS(E)2EM2XNG6QN20l/min(beipv70bar)ServoValves4WRPENG10,16,25,32Qmax3500l/min4/3HRV1NG6Qmax24l/min4/3WV1NG6/

3、10Qmax120l/min4/3WV1OBENG6/10Qmax120l/min4/3WV1OBENG6/10Qmax100l/minHIHIHIHIHIHIHIHI414th–15thJanuary2004,BoschRexrothinChina514th–15thJanuary2004,BoschRexrothinChina614th–15thJanuary2004,BoschRexrothinChina开环比例液压系统传统的结构形式:4WRA精度较低,响应较慢滞环：5%；灵敏度:0.5%;反向域:1%相频特性(-900,50%输入信号):10~25Hz714th

4、–15thJanuary2004,BoschRexrothinChina4WRE…注意：不同系列的比例伺服阀的放大器（尤其外置放大器），其电气参数不同！即外置放大器一般不可更换！不同系列的比例伺服阀的安装尺寸有的相同，有的不同，需进行一下核对！814th–15thJanuary2004,BoschRexrothinChina914th–15thJanuary2004,BoschRexrothinChina开环比例液压系统先导式比例方向阀:4WRZ电比例控制多路阀的仿制品精度较低,响应较慢滞环：6%；1014th–15thJanuary2004,BoschRexrothin

5、ChinaProportionalDirectionalValve4WRZE-7X1114th–15thJanuary2004,BoschRexrothinChinaFeatures4WRZE-7X...PilotedProportionalValvewithandwithoutOnBoardElectronicsPilotpressurecontrolledbyapressurecontrolvalveD3HighreliabilityandsimpleoperationAtlossofelectricalpowerorcablebrake,mainspoolisposit

6、ionedinstrokecenterpositionmax.allowablecontaminationlevelofthefluidisclass9toNAS1638,or18/15toISO44061214th–15thJanuary2004,BoschRexrothinChina1314th–15thJanuary2004,BoschRexrothinChina1414th–15thJanuary2004,BoschRexrothinChina开环比例液压系统DBETE…精度一般,响应较慢Qmax=2l/min.滞环：1.5%重复精度:2%线性度:最高压力的

7、3.5%开关时间:30~150ms1514th–15thJanuary2004,BoschRexrothinChina直控式，带反馈；DBETRE…(PV1-DBV…)DBETRE…精度较高,响应很快Qmax=1l/min.滞环：0.2%温漂:1%，当T=400C开关时间:10ms（10%）~30ms（100%）1614th–15thJanuary2004,BoschRexrothinChina先导式，不带反馈；（Z）DBE（E）…6（Z）DBE（E）…精度一般,响应较快Qmax=30l/min