080627计量泵设计.doc

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1、MeteringPumps-OperatingInstructionsLEWADrivesTypeEL45andEL601productInformation1.1ApplicationTheseoperatinginstructionsapplytoLEWAmeteringpumpdrivestypeEL45andEL60withmanualstrokeadjustment.Theproductnumber(pumpnumber)canbefoundinthetechnicaldatasheetandonthenameplatefixedt

2、othedrivecasing.FormodelswithelectricorpneumaticstrokeadjustmenttheenclosedoperatinginstructionsB4.156or4.231shouldbefollowed.1.2PerformanceandApplicabilitiesSeetechnicaldatasheetandoperatinginstructionsB0.100.Plungerthrust:EL454500NEL606000NStrokelengthmax.20mmWhichpumphea

3、dscanbeAttached:plunger,Diaphragm’BellowspumpheadsScaledivisionsaxialscale:1.00mmCircumferentialScale:0.01mm1.3ConstructionandMethodofOperation(seeFig.1)Thedrivechangestherotarymotion,inducedbythedrivemotor,intoanoscillating(reciprocating)movement.Thestokelengthcanbechanged

4、steplesslyfromzeroto20mm.Thestokefrequencydependsonthemotorspeedandonthereductionratiooftheintergralwormgear.Thedriveworksonthevarilableeccentricprinciple.Thewormshaft(9),whichiscoupledtothedrivemotor,transmitstherotarymotionviawormwheel(3)andhollowshaft(2)directlytotheecce

5、ntric(7).Thelatteractuatesplunger(28)viaconnectingrod(10).Adjustmentofplungerstrokeisachievedbytruningthehandwheel(21).Theadjustingspindle(57)andtheslidingshaft(50)arethusdisplacedaxially.Thismovementisconvertedviatheskewslotintheslidingshaft(50)intoaradialdisplacementofthe

6、eccentric(7),i.e.intoachangeintheextentofitseccentricity.Thestrokecanbealteredwiththepumpstoppedorrunning.Thereisalinearrelationshipbetweentheamountofadjustmentandstokelength.Mutilplepumpscanbemadeupbylinkinganumberofsingledrivesinline.Thewormshaftsoftheindividualdrivesaret

7、henfastenedtogetherbykecouplings.Adjustmentoftheeccentricdisplacementisdescribedin7.2.Thedrivescanrunindifferentstrokefrequenciesdifferentindividualreductionratiosarechosen.1.1SiteRequirementsB0.100,sect.2.1.2TransportationandInstallationB0.100,sect.3.4Operation4.1Operation

8、alArrangementsDriveswithmanualadjustment:thestrokelengthcanbeadjusted,withthepumpr