JBT 6681-1993 玉米收获机械 试验方法

B91JB/T668119931993-06-041994-01-01112GB5262GB5667GB6979GB8097GB10394GB/T14248JB/T626833.1GB5262GB5667GB69793.2()3.33.43.5()3.63.745414.1GB69791993-06-04JB/T668119931994-01-01JB/T6681199324.2GB697975kg4.3()()3()()4.4GB697955.15.25.33265.3.15.3.1.1GB5262()5.3.1.21010cm5.3.1.3105.3.1.4105.3.1.5505.3.1.6505.3.1.7505.3.1.8(10cm)GB5262a.50gb.523cmJB/T668119933c.531d.523cm5.3.2GB5262()5.3.3GB52625.3.3.10101020cm5.3.3.20101020cm5.3.4GB526266.16.1.16.1.276.1.320m15m3050m20m(24)35cm6.1.4()56.1.56.1.66.1.7A()6.1.80.1s0.1m()0.1m/s()0.2kg1g0.5kg10g1JB/T6681199346.26.2.11086.2.26.2.2.1()(1)8Q=tW(1)Qkg/sW()kgts6.2.2.2()6.2.2.18(2)υ=tL(2)υ()m/sm6.2.36.2.3.1()()5cm(3)9SL=ZLWW100(3)S%WgWZ=WqWLWUgWqgWUg6.2.3.2()(5cm)(4)9SU=ZUWW100(4)SU%6.2.4(5)9JB/T668119935Sj=ZjWW100(5)Sj%Wjg6.2.56.2.5.151m210cm(6)(8)10a.Fh=()∑∑−n6n(6)Fh%WngWbgb.W=NW∑n(7)Fb=()−100(8)WgNFb%WnmaxgWnming6.2.5.2a.1kg5GB1039411b.50mm116.36.3.16.2.16.2.26.2.3.26.2.46.2.5810(11)126.3.212JB/T6681199366.3.2.16.2.3.16.3.2.2(9)Sb=zbWW100(9)Sb%Wbg6.3.33(10)12B=GGj100(10)B%GjG6.3.4()(11)12Ga=paWW100(11)Ga%WagWpg6.3.52000g(12)12Zs=isWW100(12)Zs%Wsgig6.41()136.4.1(13)(15)JB/T668119937a.Nq=Pqυ103(13)b.Nc=3cnMπ104(14)c.Nzx=NqNc(15)NqkWPqNυ()m/sNckWMcNmnr/min6.4.2(16)Nzx=NznNz=()3xxzznMnM+π104(16)NznkWNzkWMzNmMxNmnzr/minnxr/min6.4.320m14(17)=RnRnLππ22−100(17)%LmR()mn6.5JB/T6268GB/T142487JB/T6681199387.16h157.27.2.1B()7.2.27.37.3.1(18)(19)7.3.1.1Ec=∑∑ccbTQ(18)Echa/hQcbhaTch7.3.1.2Eb=∑∑bbTQ(19)Ebha/hQbhaTbh7.3.2(20)Gn=∑∑cbnzQG(20)Gnkg/haGnzkgQcbha7.3.37.47.4.17.4.2JB/T6681199397.4.37.4.488.116178.28.2.18.2.28.2.38.2.4()()8.2.58.2.68.2.78.2.81JB/T6681199310kWmm()mmkgkgcmmmmmmmmmmmmmmm()mmmmr/minr/minmmr/minr/min()km/h2()JB/T6681199311cmcmcmcmcmcmcm2()JB/T6681199312123%%%%g%gg%gg%gg%()ggg/m2kg/ha3JB/T668119931312345678910%12cm312()cm3123()/m24cmgggg%%12010312102035JB/T6681199314cm123kPa0101020kPa612345hmin%m/s7JB/T6681199315mmm/s()mmmmmmmmr/minmmmmmmr/minr/min8JB/T6681199316k12345cmms()m/skgkgkgkgkg/s9k12345kgkgkgkgg%g%g%%gg%10JB/T6681199317m/skW123451234g5123410cmg51m2g10cmg%ggg%11JB/T6681199318m/skW12345mmmmmmmmmmmmmmmmmmmm%kgkgkg%12JB/T6681199319m/skW12345kgkgkgkgg%g%%g%g%%%gg%13JB/T6681199320kWms()m/skWkWkNkWNmr/minkWkWNmr/minkWNmr/min14()kW1212mmmm()%15JB/T6681199321kWmkg/hahakgkg/hahmin16JB/T6681199322kWcmm/skg/s%%%%%%%%%%mm%ha/hha/hhh%kg/hadB(A)m/s217JB/T6681199323kW123451km1kmhminhaha/hha/hkg/haJB/T6681199324AA1a.1b.1c.2d.2e.2f.1g.1h.501i.2j.1k.8l.1m.1n.1o.1p.1q.()r.s.JB/T6681199325BB1B1.1120h(4550ha)B1.210%3B1.3B1.4B1.5B1B2B3B4B2B2.1B2.2B2.30.1hB3B3.1()B3.2B3.3a.b.c.B3.4B3.5B3.6B3.7JB/T6681199326B3.8B44a.()b.c.d.(30min)B5B5.1B5.1.1B3B5.2B5.2.1(B1)(B2)a.MTTFF=()s0srtt∑∑+(B1)b.(MTTFF)L=()()22,2s20s++∑∑raXtt(B2)MTTFF()h(MTTFF)()hrs(rs=01)tsht0hX2(a2rs2)a2rs2X2B5.2.2(B3)(B4)a.MTBF=∑∑rti(B3)b.JB/T6681199327(MTBF)L=()22,2+∑raXti(B4)MTBF()h(MTBF)L()htihrX2(a2r+2)a(2r+2)X2B5.2.3(B5)A=∑∑∑+rtttii100(B5)A%trhB1()B2()hakghhhminJB/T6681199328B3()hhahh,minB4()hhhh%JB/T6681199329NJ17479JB/T66811993JB/T66811993*2100044*88012301/16258,000199312199312150020.001215