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

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