新型旋风分离清选系统内部气流及物料状态研究

河南科技大学硕士学位论文新型旋风分离清选系统内部气流及物料状态研究姓名：庞奇申请学位级别：硕士专业：农业机械化工程指导教师：师清翔20091201IISubject:ResearchontheFlowFieldandMaterialMotionStatusinsideNewCycloneSeparatingCleaningSystemSpecialty:MachineryofAgricultureName:PangQiSupervisor:ShiQingxiangProfessorABSTRACTThemicro-combineharvesterofwheatissuitableforworkinginthemountainous,hillyareasandsmallfields.ItisdevelopedbyHenanUniversityofScienceandTechnology.Thecycloneseparatingofthismachinehasfeaturesofsimplestructure,smallvolume,lightweight,reliableoperationandconfigurationofconvenient.Itisbrightprospectthatthemachineisusedasacleanerwithmicro-mechanicaldevicesofwheatharvest.However,therotationalspeedofthewinnowerwhichistoohigh,leadstothemachinelossmorepower.Atthesametime,somestrawremainswhenlightmaterialsaretooexcessivelyinthecycloneseparator,whichcausesthemachinenotworkingnormally.Inordertosolvetheseproblems,Three-holeprobeisusedtostudythefolwmotionstatusofthewinnowerpipeandcycloneseparator,andthepipeflowaffectedbythesizeoftheentrancetowinnowerisalsoencludedintheproject.Inthemeanwhile,weusehigh-speedcameratophotothemotionstatusofmaterialsinsidecycloneandwinnowerpipe.Theresultsshowthatthesizeoftheentrancetowinnowerhasgreatimpactsonthepipeflow.Whatcanbefoundfromthesurveyisthat:thetangentialvelocityofflowinsidecyclonereducegraduallyfromedgetocenterofthecyclone,whiletheaxialvelocityisjustcontrary;thestaticpressureneartheaxisofthecycloneisthelowest.Themotionstatusinsidethecyclonerecordedbythehighspeedcameraconformstotheflowmeasurement.KEYWORDS:Cycloneseparator,Three-holeprobe,Highspeedcamera,Flowfield,Cycloneseparatingcleaningsystem,AirflowvelocityDissertationType:Appliedresearch1111.120092401[1-4]:4LZ-2-3060HL6000C-6BA[5-9]45kg/s910kg/s9m9860STS276kWAFX8010303kWCR9090434kW10.7m78t/h[10],,,[11-12]220904L-804LZ-0.54L-0.212151.2[13-20]1.+132.3.1.34[21-25]4L-0.2[26-30]1.41.4.11.2.153.4.1.4.21.Matlab7.0OriginLab7.5Excel[31-33]2.3.1054.2622.12.1.12-12-1Fig.2-1Structureofthecycloneseparatingdevice1.2.3.4.5.6.2.1.272.1.3[34-39]2-22-2Fig.2-2Tangentdirectioncycloneseparator1.2.3.4.1234282.22.2.14L-0.2[40-46]2-32-4U2-3Fig.2-3Structureofthecycloneseparating1.2.3.4.5.6.7.2-4Fig.2-4Thephotographoftest-bed92.2.2U2-12-1Tab.2-1TestinstrumentYYT-200B1MODEL1000011YTSP100L-4-2.2kw1YTSP100L-4-2.2kw1G5A45P511G5A41P511DM6234-P1MP30001P4-2.8G1IBM1HP10101XSJ21300W-222.2.30.0657V=20/2102-5Fig.2-5Schematicofpressuregauge2-6Fig.2-6Calibrationcurve2-2Tab.2-2Calibrationparameters+25+20+15+10+50-5-10-15-20-25Kβ0.8840.5750.350.20.08700.0920.1730.2610.0340.441oK0.3910.1910.0890.050.020.0190.0180.0270.0240.0460.0910.8410.6170.4720.4140.3890.3630.3590.3580.3520.3740.40611U()()3121312PPPPPPK−−β−−=1()()02213102PPPPPPK−−−−=2()()021312PPPPPP−−−−ξ=31.U13PP=13PP≈U2-72-7Fig.2-7Thephotographofmeasurement-unit2.31PP−21PP−1KβKβKβO2-6oKoK20P3P212V()02gVPP=−γ0.03416(273)Ptγ=+(/3m)G9.812/ms0p,p/2mt0C2.2.41.[47]132.KODAKFASTCAM-Super10KC,2-82510000s-1COMS100002-82-8Fig.2-8high-speedphotocoverage2-92142-9Fig.2-9Thesystemofhighspeedcamera31533.14L-0.23.1.1500r/min600r/min700r/min800r/min900r/min1000r/min1100r/minPd4dVP=3-23-13-1Fig.3-1Thepictureofstructure1.2.3.4.163-2Fig.3-2Thepictureofmeasuringpoints3.1.23-13-33-1Tab.3-1Thesheetoftest-datar/min(mmH2O)(mmH2O)(mmH2O)(m/s)0.20.20.40.35000.30.50.322.250.30.20.50.46000.50.70.432.60.30.30.70.57000.70.80.552.973170.30.40.90.58001.11.10.723.390.50.410.79001.21.40.873.720.80.51.20.810001.71.91.154.2910.51.80.911001.92.21.384.713.1.3123456400500600700800900100011001200r/min)(m/s)3-3Fig.3-3velocityoftheairflow3-13-3183.23.2.1500r/min600r/min700r/min800r/min900r/min1000r/min1100r/min3.2.23-23-43-2Tab.3-2Thesheetoftest-datar/min(mmH2O)(mmH2O)(mmH2O)(m/s)1.51.2215002.41.91.675.162.31.731.46003.63.62.436.243.12.342.27004.93.63.357.3242.84.42.78006.44.84.188.1853.66.63.59008.16.45.539.4110006.24.46.6810.343197.44.3107.87.259.85.6110012108.2311.48456789101112400500600700800900100011001200r/min)(m/s)3-4Fig.3-4velocityoftheairflow3-23.33-520123456789101112400500600700800900100011001200(r/min)m/s)3-5Fig.3-5velocityoftheairflow1.2.3.4.5.42144.11100r/min4.21100r/min0r/min300r/min600r/min900r/min1200r/min1500r/min1800r/min2100r/min4.34-14-14-1Tab.4-1Thesheetoftest-datar/min(mmH2O)(mmH2O)(mmH2O)(m/s)556.65.808.86.86.3310.074.856.663008.87.46.4310.1560055.26.5710.25226.66.28.67.85.45.67.26.49009.697.210.736.66.47.66.2120011.410.28.0711.367.26.29.85.4150012.210.48.5311.695.64.69.87.2180013.212.48.811.875.84107.2210013.813.69.0712.0499.51010.51111.51212.51303006009001200150018002100(r/min)(m/s)4-1Fig.4-1velocityoftheairflow4-11100r/min4230r/min600r/min600r/min1500r/min1100r/min()4.41100r/min52455.1AUTOCADAUTOCAD2100r/min1100r/min255.2Vq1Vq2Vq3Vz1Vz2Vz3Vg1Vg2Vg3Vk1Vk2Vk35.2.15-15005265-15-1Fig.5-1Thephotographofwheatstraw’smovementAUTOCAD5-1275-1Tab.5-1Thesheetoftest-data(m/s)4.464.968.36(m/s)4.684.336.17(m/s)11.6211.8712.11(m/s)4.714.354.045-15.2.25-25-2Tab.5-2Thesheetoftest-data(m/s)9.218.939.98(m/s)10.239.799.39(m/s)11.8112.0112.22(m/s10.669.849.145285-25.31.2.3.62966.16.1.14L-0.26-12100r/min,1