长臂式液压支架整架试验要求设计外文文献翻译中英文翻译外文翻译.docx
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长臂式液压支架整架试验要求设计外文文献翻译中英文翻译外文翻译
英文原文
STRUCTURALTESTINGREQUIREMENTS
FORLONGWALLSHIELDS
SECTION
GENERALGUIDELINESA
LOADTESTINGB
STRUCTURALMEASUREMENTSC
STRUCTURALINSPECTIOND
ACCEPTANCECRITERIAE
SECTIONA
GENERALGUIDELINE
Thisdocumentexplainsprototypeshieldtestingrequirementsfortwo-leg,andrigidbaselongwallshields.
Theprototypeshieldtestedshallcomplywiththeproductiondrawingsandspecifications.Areportdocumentingthetestresultsispreparedandsubmittedtothecustomer.
Theloadtestingprogramshallconsistof30,000loadcyclesonthebase,canopy,cavingshield,andlinksasoutlinedunderLoadTesting.
Theprototypeshieldtestedistoberetainedbythemanufacturerforfuturetestingintheeventthatmodificationsarerequiredaftertheshieldsareinservice.
Theprototypeshieldshallbetestedbypressurizingthelegcylinderstoamaximumpressureof504barandtoaminimumpressureof100barforeachloadcycle.Theshieldshallbetestedwiththeactuallegcylindersusedinproductionoftheorder.Duringcyclictesting,thecylinderstagesaretobeorientedtoproducemaximumpistonandglandsideloads.Theupperstageofonelegcylinderwillbefullyextendedduringcycling.Themajorstageofthesecondlegcylinderwillbeextendedasfaraspracticalduringcycling,butmustremainthe“working”stageduringcycling.
Theshieldshallbesetataheighttoproducethesupportforce.Othertestrequirementsandcylinderpressuresaregiveninindividualtestcases.
Loadingblocksusedintestingshallbesizedtolimittheloadsto2.0–2.5KN/cm2.Loadingblockmaterialsshallbeselectedtoprovideasuniformloadingaspossible.Blockelevationshallbegreatenoughsothatthedeflectedstructures（canopyandrigidbase）arefreeofandnotcontactingtheteststructure.Thebaseshallbetestedwithblocksthatare100mmthick,andtheunsupportedcornersofthebasewillbeallowedtotouchtheteststructure.Otherspecialblocksizingandmaterialrequirementsareoutlinedintheloadcases.
Duringprototypeshieldstructuraltesting,thevendorshallmaintainalogrecordingthedate,loadcaseandloadcyclesrequired,loadcyclescompleted,andanydefectsfoundduringshieldstructuralinspections.
Shieldstructuralinspectionsduringtestingshalloccurattheendofeachloadtestcaseorevery500cycles.Theshieldinspectionshallincludevisualobservationforcrackingandpermanentdeformation.Anyquestionablecrackdeterminationshallberesolvedbyusingothernon-destructive（NDT）methods;suchas,dyepenetrant,magneticparticleinspection（MPI）,orultrasonicinspection（UT）.Allcracksshallbepermanentlymarkedonthetestshield,indicatingthecracklength.Thelocationofthecylinderstageswillbeobservedandrecordedwheneverstructuralinspectionsareperformed.
Customershalldesignatearepresentativetothemanufacturerforshieldtesting,whomaywitnessallorpartoftheshieldtesting.
Allrepairs,modifications,andstructuralfailuresshallbereportedtotheCustomer’srepresentativeimmediately.Nounduedelayinreportingshalloccur.
Beforeandaftercompletionofloadtesting,thecanopy,cavingshield,andbaseshallbemeasuredandrecordedforflatness（longitudinal,transverse,anddiagonal）.Allpinandborediametersshallbemeasuredandrecorded.
AcceptanceoftheshieldstructureisbasedoncrackingandpermanentdeformationsasoutlinedinAcceptanceCriteria.
Modificationsmadetotheprototypeshieldresultingfromtestfailureshallberetestedaftermodificationsarecompleted.Thetestcasethatisbelievedtohavecausedthefailureshallbetheretestcase.Previoustestsarenotrequiredtoberepeatedunlessamodificationreducesstrengthinadirectionpreviouslytested.Structuralmeasurementsshallbetakenonthecomponentbeforeandafterthemodification.Theoriginalacceptancecriteriaforplasticdeformationshallremainunchanged,butadjustmentsmaybemadeonacasebasisifagreedtobyCustomer.
Deflectionmeasurementsarerequiredforallcanopyandbasebendingtests.Themanufactureristoassigntheappropriateareasfordeflectionmeasurements;however,measurementsshallrecorddeflectionsatlocationsatorneartheirmaximumvalues.Additionaldeflectionrequirementsareineachloadtestcase.Straingaugemeasurementsarenotrequired,butshallbeusedifthemanufacturer’stestingprogramrequires.
Afinaltestreportisrequiredfordocumentationofalltest,failures,repairs,modifications,measurements,andfinalinspection.ThefinaltestreportshallbesenttoCustomerwithinonemonthoftestcompletion.
SECTIONB
LOADTESTING
SHIELDTESTING
TEST
CANOPY
BASE
CYCLES
1
OffsetYielding
Bending
2,000
2
Bending
ToeLoading
10,000
3
MaximumBending&Torsion
Bending
4,000
4
MaximumBendingMaximum
Dishing&Bending
3,000
5
SideShieldBending
MaximumTorsion
2,000
6
Bending
DiagonalLoading
2,000
7
Bending
ThreePointLoading
2,000
8
TransverseBending
EdgeLoading
3,000
9
HingeDishing
AsymmetricEdgeLoading
2,000
TOTALCYCLES
30,000
TEST
CASE
CYCLES/REVERSALS
10
LegRetention
200
11
LegPocketOverload
1
12
StabilizingRam
2,000
13
Range
2,2m–4,5m
14
Articulation
Drawing
15
PanLineHook-UpMovement
1perposition
16
RamSystemShearPin
3
17
RamSystemOverload
1,000
18
BaseLiftOverload
1perposition
19
FaceSprag
20
Cycle-Times
21
WeightandCenterofGravity
Drawing
Unlessindicatedotherwiseinthefollowingdiagrams.Thecenterlineoftheblocks.Shallbelocated100mmfromthefrontandrearendofcanopyandbase.
TEST1
CANOPY:
OFFSETYIELDING
BASE:
BENDING
1:
TESTHEIGHTATMAXIMUMEFFECTIVESUPPORTFORCE
DIMENSIONS:
‘W’=DISTANCEASSHOWNTOEDGEOFFIXEDSIDEPLATE
‘Y’=W-250
‘L’=LENGTHOFROOFCONTACT
‘X’=600
CANOPY:
BLOCKSTOBEROLLERTYPETODISTRIBUTELOADONATRANSVERSELYTILTEDCANOPY.
MOVEBLOCKSTOOPPOSITESIDEOFCANOPYEVERY500CYCLES.
BASE:
BLOCKASSHOWN.
CYCLES:
TEST12000
MEASUREMENTS:
DISPLACEMENTWILLBEMEASUREDATTHETRIANGLESSHOWNALONGTHECANOPYHINGE.THECALCULATEDANGLEMUSTNOTEXCEED10oINTHELOADEDCONDITION.
TEST2
CANOPY:
BENDING
BASE:
TOELOADING
CANOPY:
BLOCKASSHOWN.
BASE:
BLOCKASSHOWN.VENDOROPTION:
INCLINEBASETOACHIEVEPOINTLOADINGONTOERADIUS.
CYCLES:
10,000
TEST3
CANOPY:
MAXIMUMBENDINGANDTORSION
BASE:
BENDING
CANOPY:
UNSUPPORTEDCORNERISROTATEDEVERY500CYCLESTOONEOFTHEFOURCORNERSOFTHECANOPY.
BASE:
BLOCKASSHOWN.
CYCLES:
4,000
TEST4
CANOPY:
MAXIMUMTORSION
BASE:
TRANSVERSEDISHING;BASEBENDING
CANOPY:
BLOCKASSHOWN.REVERSEEVERY500CYCLES
BASE:
BLOCKASSHOWN.DIMENSION“Y”TOBE50MMLESSTHANTHEWIDTHACROSSTHEINSIDEOFTHESIDEMEMBERSOFTHEBASE
（‘Y’=‘W’-50MM）
CYCLES:
3,000
TEST5
CANOPY:
SIDESHIELDBENDING
BASE:
MAXIMUMTORSION
CANOPY:
BLOCKASSHOWN.SIDESHIELDFULLYEXTENDED
BASE:
REVERSEBLOCKSEVERY500CYCLES.
CYCLES:
2,000
TEST6
CANOPY:
BENDING
BASE:
DIAGONALLOADING
CANOPY:
BLOCKASSHOWN
BASE:
OPPOSITECORNERSEVERY500CYCLES.
CYCLES:
2,000
TEST7
CANOPY:
BENDING
BASE:
THREEPOINTLOADING
CANOPY:
BLOCKASSHOWN.
BASE:
ROTATEUNSUPPORTEDCORNEREVERY500CYCLESTOALLFOURCORNERS.
CYCLES:
2,000
TEST8
CANOPY:
TRANSVERSEBENDING
BASE:
SYMMETRICEDGELOADING
CANOPY:
BLOCKASSHOWN.
BASE:
STARTWITHBLOCKSA&D.MOVETOBLOCKSB&CAFTER500CYCLES.SWITCHEVERY500CYCLES.
CYCLES:
3,000
TEST9
CANOPY:
HINGEDISHING
BASE:
ASYMMETRICEDGELOADING
CANOPY:
BLOCKINGMATERIALCHOSENTOSIMULATETHECOMPRESSIVESTRENGTHOFTHEROOF.
SWITCHREARBLOCKINGEVERY500CYCLES.
BASE:
STARTWITHBLOCKSA&C.MOVETOBLOCKSB&DAFTER500CYCLES.SWITCHEVERY500CYCLES.
CYCLES:
2,000
TEST10
LEGRETENTION
Canopyandbaseblockedfromretractingandonelegpressurizedtoretractat350barfor200cycles.
Thebottomlegretainershallbedesignedtofailbeforethetoplegretainerfails.Legcylindershallremainundamaged.Nofailuresallowableattestpressure.Permanentdeformationisallowable,butshallnotaffectfunctionalityofretention.
TEST11
LEGPOCKETOVERLOAD
Baseandcanopylegpocketsaresupported100mmeithersideoflegpocketpads.Bothlegcylindersarepressurizedto1.5timesyieldpressureforonecycle.
TEST12
STABILIZINGRAM
Maximumpressureforcyclictestingofthecanopycylinderanditsattachmentpointsshallbedeterminedexperimentally.Theshieldwillbeplacedinthetestrig.Theshieldwillbecontrolledandhosedasitwillbeontheproductionunits.Thelegcylinderswillbeextendedatarateequaltothepredictedin-servicerate.Hydraulicpressuretothelegcylinderswillsimulatein-servicepressure.Asthelegcylindersextend,thecanopycylindermustyieldfluidthroughitsyieldcircuit.Theblockwillbemovedtodeterminethelocationthatcreatesmaximumflowandpressureinthecanopytiltcylinder.Trialswillbeconductedtodeterminemaximumpressureintheextendandretractmodesofcanopytiltcylinderyielding.
Afterdeterminingthemaximumcanopytiltcylinderpressureinbothdirections,cyclictestingofthecylindercanbeconducted.Thecylinderwillbeoperatedfor2,000cyclesineachdirectionat1.12timestheexperimentallyfoundpressuresdescribedabove.
TEST13
RANGE
Measuresupportheightfullyextendedandfullyclosed.
TEST14
ARTICULATION
Thesupportshallbearticulatedtoitsstoplimitsfullyextendedandfullyclosedwithoutinterferenceordamagetoanycomponents.
TEST15
PANLINEHOOK-UPMOVEMENT
A）LATERAL
Withshieldintheadvanceposition,applya100KNlateralloadontherelaybarpanlinehook-up.M
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