挖掘机液压系统及功率损失分析唐伯尧, 李加文, 李从心(上海交通大学国家模具CAD工程研究中心, 上海200030)K1:A!,Ad?TbW%n!AdFa#aq+;Adqyss,A!?e4Gb1oM:;q;?e;A!ms|: TH137 DSM: B cI|: 1001- 3881 ( 2004) 5- 108- 2The Analysis of Power Loss of Excavator Hydraulic SystemTANG Bo-yao, LI Jia-wen, LI Cong-xin(StateMould CAD Research Center, Shanghai Jiaotong University, Shanghai 200030, China)Abstract: Hydraulic excavator is a kind of heavy construction equipment. It is very important for the quality of excavator hy-draulic system. In thepaper thekinds of hydraulic system of excavator and their characteristics of flux and power weredescribed indetail; Thefactors of causing power loss of hydraulicsystem were analysed.Keywords: Flux; Power loss; Energy saving controls; Hydraulic excavator1 !AdFa+!AdMB?ZVb-,!Ad1A5m1 AdFAsF1 ,m1UbA,DeA,A,D&5s55DebA,Y2 ,!AdB$sdMdbMdRb111 挖掘机定量液压系统Ad1l!( 3B,DeAdrq/,H,ArqKV3815% 3bAm5 q!L=T,fidNbPd,dD!,A,BM7M,d*sY,yNdrqVrbA!T,m5Ub211 节流损失A!BYDTAd_eq,M,bd,V|BYDeVMg,d 3,m6UbDgq1bbD)H, AaBg1, Og7,AYVOgQbim6 BYDMAdrm(2 3MPa),yN/bbT:H,DAaBgvu7, Ogv1,1OgTPd6,X,V7/qbdV,_Du7,A7ST,YVMAaOgY1LCAbOg1,h,nf/Adrqb212 溢流损失9F,9v9F,D!H,d7SnbTyVv7TTH,T|n,A,YVnDQ,NH?qhnDM?,6bTqM,f?3H,TMm7A,|Mnq,?-qb!T,)V,ydn73qMV4bm7 VHnV3n,diTnb!r,Y!D(nDF,nm8),BZHK,6BZH?TirTbH,!v8,r?l,?YVDnQ,/qbm8 rDH,D1,yv8,Pr?(MA,),ADr6BH,yNDnDT,|?Ad7b213 沿程功率损失Ad/q9Vljb,g)b(v2 3MPa)vBsb%EvYA5,HA5,El5h4bkTV,A,g)5h15h1 2MPabyN,!9A59EqB1nb214 摩擦功率损失!Ad,q1Aa?A,qbH,5?q9,A,q99FbyN,dlH,hqb215 动臂a斗杆下降过程中的势能损失D6V|A?bD/Vy,YD_D,D/HEDT,V7|?b,TTH,9?5b216 功率匹配不合理而引起的损失!TM,PT6T,/q,(下转第118页)#109#55A6 20041No15216m/minb2 L112131411 51=6171O8191_O1011112 121131141=1 1512m2 _h?5=V),5 ,1!9m1: 1/1:m15ed1:1.e1q:S/v,20011=61Aqm1:8!?eYvbAv7?0?ed,Aq,VMPIDeE,qq4315%P5 ,|zrTbID=1|u,b31A!A,1A, 1998 ( 2) 1=