《MIL-P-19152A-1974 2.58.pdf》由会员分享，可在线阅读，更多相关《MIL-P-19152A-1974 2.58.pdf（15页珍藏版）》请在三一文库上搜索。
1、o 0 MI L- P-191S2A(OS1 20 December 97 SUPERSEDING NIL-P-19152(NOrd) Amendment1 26June19S7 NIL ITARYSPEC1F1CATION PACKINCS,IIYDRAULIC,tll GN PRESSURE (FORNYOROPNEUMATICSYSTENS) 7hu sperifin!kmAMbrenappwdfiru= b.v:4.S.2-Frictionevaluationtest 4.5.3-Five :4.5,4-Cold 3.16Workmanship. a uniformproductin
2、thousandcycle endurancetest temperaturecyclingtest. Workmanshipshallbeofsuchqualityastoproduce accordancewiththedetailedrequirementsofthe applicabledrawingsandthisspecification. 4.QUALITYASSURANCEPROVISIONS 4.1Responsibilityforinspection.Unlessotherwisespecifiedinthe contractorpurchaseorder,thesuppl
3、ierisresponsiblefortheperfor- manceofallinspectionrequirementsasspecifiedherein.Exceptas otherwisespecifiedinthecontractororder,thesuppliermay usehis own oranyotherfacilitiessui tab lefortheperformanceoftheinspec- tionrequirementsspecifiedherein,unlessdisapprovedby theGovernment.a The Governmentrese
4、rvestherighttoperformanyoftheinspectionsset forthinthespecificationwheresuchinspectionsaredeemednecessary toassuresuppliesandservicesconformtoprescribedrequirements. 4.2Classificationofinspections.Theinspectionrequirementsspeci- fiedhereinareclassifiedasfollows: First articleinspection(see .1.3and 6
5、.3j :Qualityconformanceinspection(see 4.4) . 4“.3Firstarticle”inspection.”“lhe “fi”rstarticle”i-nspcctionofthe packingsshallconsistofallthetestsandexaminationsofthisspeci- fication. 4. 3.1Firstarticleinspectionsamples.Firstarticleinspection samplesshallbesubmittedasspecifiedhvthecontractingofficeror
6、 ageicy.The acceptablequality” level (AQj. ) for first artcleinspection shall be1.S percentdefective.If:1., AQL fallsbelow1.5percentin anyphaseofthetests,thepackingshallfailtoqualify. G 6 I MIL- P-191 S2A(OS) o 4.4Qualityconformanceinspection(enditemtesting).The exsadna- tionandtestscomprisingqualit
7、yconformanceinspectionshallconsist oftheexaminationof4.4.2,sndtests4.5.1.1,4. S. 1.2,and4. S. 1.3. ,. 4.4.1Samp 1in. 4.4.1.1Inspectionlot.A lotshallconsistoffinishedpackings ofthessmematerial,type,style,andsizeproducedunderessentially likeconditions,fabricatedbythesame process,andproducedasone conti
8、nuousrunororder,orpartthereof,and submittedforquality conformanceinspectionatthesametime.Presentationoflotsshal1 be inaccordancewithMIL-5rD-10s. 4.4. 1.2Samp ling for qualityconfomnanceinspectiontests(see4.S). Ssmlesofoackiruzs,allsize;included.shallbetakenfroma sinRle productioniotfo;estinginaccord
9、ancewithMIL-STD- 10S atInspethewiremustbeded;cted fromthetotalweight.Thissecondweightshallbecalled W2.When weighinginwatercaremustbetakenthatthespecimenisfreefrom adheringairbubbles,and,ifnecessa,itmay befirst wettedby dippinginto9S percentalcoholora O.ipercentsolutionofaerosol OT inwaterandrinsedwi
10、thdistilledwater.Afterthissecondweighing thespecimenmustbe blotteddrywithfilterpaper. The specimenshall thenbecompletelyimmersedina containerofASTMOilNo.3 ofmethod 6001,FED-sTo.601, and allowedtoremainintheoi 1 fora periodof 70 hourst1 hourat150i2“ F.“The containershallconformto 3.9,2ofmethod6001,FE
11、D-STD-601.At theendofthisoilimmersion periodthespecimenshal 1 beremovedandcleanedbyrapidlyrinsingi t withpetroleumether(boilingpoint30C to60”C) .The specimen shallthenbeweighedinairtothenearestmi lligram.Thisthird weightshallbecalledW3.The specimenshallthenbe weighedinwater asdescribedabove.Thisfour
12、thweightshal 1 hecalledWPercent volumechangeofthespecimenisequalto G I 8 o 0 B MIL-P-19152A(OS) (w-w,)-(w,-w*),00 (w I-W2 Apositiveanswerrepresentsanincreaseinvolumeofthepacking. 4.s. 1.3Corrosionand adhesiontests.The packingshall betested for the corrosionor adhesionto brass , copper,corrosionresis
13、tant steel(CRES) and steelto determinecompliancewiththe requirements of 3.S and 3.6.Thedeviceforconductingthesetestsshal1 bea com- pressiondevice.Thiscompressiondeviceshal1 consistofa baseplate providedwithtwo studboltson whichpolishedplates(to32 micro-inch finish)ofbrassQQ-B-613orQQ-B-637,copperQQ-
14、C-450,CRES SteelQQ-S- 766,andKildsteelQQ-S-698aresuccessivelyplaced.Theseplatesused inthisdeviceshallmeasure3 byI by1/8inches.Two compression springs,whichtogetherarecapableofimposingaloadof2S poundsper squareinch(psi), areplacedoverthestudsandsecuredbya nuton topofeachstud.The nutsalsoservetoadjust
15、thespringloadsso ostoobtainthespecifiedioadon thepackingspecimen.Thetotal surfaceareaofthepackingspecimenshallbeonesquareinch.One or more stripsofpackingmay beusedtomake up thisarea.Beforerunning thetesttheteststripsofbrass,copper,CRIZSSteel,andsteelshall becleanedwithreagentgradebenzene.Astripofone
16、oftheabove metalsandapackingspecimenareplacedinthedeviceandthestudnuts areadjustedsothatthespringsimposealoadof25 psion thepacking. The deviceassemblyshallthenbeplacedinon ovenat158i2Ffor a periodof168 hours(oneweek) .At theendofthisperiodthetest assemblyshal1 beremovedfromtheovenanddisassembled.The
17、 packing contactsurfaceofthemetaltestplateshallbecarefullyexamined forcorrosionand pitting.A slightdiscolorationofthemetalshall notbeconsideredascorrosion.The packingspecimensshallbecon- sideredasadheringifparticlesorpiecesofthepackingremainin contactwiththemetalsurface. “Iltistestshal1 beconductedf
18、oreach kindofmetalnotedabove. 4.S.2Frictionevaluationest.llle frictionevaluationtestshall beperformedon thepticklngsbeforethe5000cycleendurancetestof4 .5.3 todeterminecompliaiccwi;h3.1o.Thefrictionevaluationteston the differentialpistonandrodpackingshallbeasfollows:Theairchamber shallbechargedcoapre
19、ssureof1S50psiandtheamountofoi 1 inthe differentialsystcmshal1 besuch:1$ tobringtheendofthedifferential pistonrodflushwiththeoutsidefoccoftheglandnut.Pressuregages shallbeinstalId!ntht.airchrm!bcrtindthediffcrentialoiIchamber. t)i JslIallIhLIIl,:bledfromth,.J: f!”t. rcntilsystcmcausinga.!ropinoil pr
20、c.ss uruwI:1, t. turncausesLIICJi fl”rrt,ntialpistonroJton. eoutward. hht,ns lox.I,!co,.:i nUOUSmort.mt.nt 01” IIICJIffet-rn:i alpistonredisfirst MIL-P-191S2A(OS) observed,simultaneousreadingsoftheairandoi 1 pressuregagesshal1 benotedandrecorded.Thesepressuregagereadingswillgiveinforma- tionnecessar
21、yforcalculatingthefrictionalloadofthedifferential pistonandrodpacking.Thistestshallberepeatedforairpressures of1200, .900;600,and300 psi.7hefrictionalloadshallnotexceed- 1500 pounds .In eachinstancetheendofthedifferentialpiston rodshallbeflushwiththeoutsidefaceoftheglandnutatthebegin- ningofthetest.
22、Thistestisrunatthelowerairpressuresinorder todeterminewhetherornotthedifferentialpackingpossessesuniform frictionalcharacteristicsorseizuretendencieswhichwouldresult inan improperrelationbetweentheairandoilpressures.Inthe reducedairpressuretestsitshallbeascertainedbeforeeachtest thattheoilFressureex
23、ceedstheairpressureinthe1550 to900psi rangeinordertopreventleakageoftheairintotheoilcylinder.The frictionevaluationteston thecounter-recoilplungerpackingshallbe asfollows:Withno airpressurein, theairchamberandthecounter-recoi plungerretractedintotheairchamberthedifferentialsystemshallbe chargedwitho
24、iltoa pressureof2000psiinordertoproperlyexpandthe counter-recoilplungerpacking.The differentialpistonandrodwillbe bottomedatthebeginningofthistestand thesubsequentpositionsofthe rodwillhaveno significanceinthistest.Beforethetestisrunit shouldbeascertainedthatthedifferentialpackingiscapableofholding
25、the2000 psioi 1 pressure.The2000 psioi 1 pressureshal1 bemaintained throughoutthetestinordertokeepthecounter-recoilpackingproperly expandedduringthetest.Theairchamberisnow slowlychargedwithair soastograduallybuildup a pressurebehindthecounter-recoilplunger. itlsen theplungerstartstomove a readingoft
26、heairpressuregageshall benotedandrecorded.Thisairpressuregagereadingwillgiveinfor- mationnecessaryforcalculatingthefrictionalloadofthecounter- recoilplungerpacking.Thisloadshallnotexceed1200 pounds. 4.5.3Fivethousandcycleendurancetest.Firstarticletestsamples shallbeassembledinthetestsetof4 .5.3.1on
27、thecounter-recoil I plungerandthedifferentialpistonandrod.An oi 1 pressureof3000psi, usingoil,MIL-L-17672,MilitarySymbol2075,shallbeappliedinorder tosetthenackinerins.Aftersettinthenackinetheairchambershall bechargedoa p;essu;eof1550 psi.?heammto? oilinthedifferential systemshallbesuch=tobringtheend
28、ofthedifferentialpistonrod flushwiththeoutsidefaceoftheglandnut.Thecounter-recoilplunger.- shallthenbecycled5000timesattherateof10 cyclesperminuteon a 12 to14 inchstrokeoftheplunger.Airleakageshallberecordedat 10 minuteintervalsandtheprotrusionofthedifferentialpistonrod measuredevery100 cycles.Durin
29、gthecyclingtest, themaximum acceptable outwardmovementofthedifferentialpistonrodshallbeanaverageof 0.002inchpercyclemeasuredevery100 cycles.The count er-recoi1 plunger packingshall not permitoilleakage to exceed1 drop per10 cycles during G 10 MI L- P-19152A(OS) ,:, !,j # thetest.Tcmpcraturcreadingso
30、fthecounter-recoi1plungershallbe :j takenandrecordedatregularintcrvols.Thctemperatureofthecounter- :$!. recoilplunger,duetopackingfriction,shal1 notexceed130F. o 0 4.5.3.1Cyclingtestset.Thecyclingtestsetconsistsessentially ofa stripped5-inch,38-caliberhousing,butcontainingal 1 ofthe componentsofthec
31、ount er-recoi1 systcm.Ilydraulic equipmentisprO- videdon theteststandb?whichthecounter-recoi1 plungeriscycled soastosimulatethe ttctlonof actualgunfire.A cyclingcounter, suitablegages,andloadmeasuringdevicesareprovidedtO *tainthe requireddata. 4. 5.4Coldtemperaturecyclingtest.A suitablecoldtemperatu
32、re testboxshal1 heconstructedoroundthehousingsinthevicinityof theenclosurecontainingthecount er-recoi1 plungerpackingandthe differentialpistonandrodpackings.The boxshallbesoconstructed andlocatedthatitwillbecnpablcofholdingsufficientquantities ofdryiceagainstthepackingenclosures.Provisionshal!bemade
33、 fordeterminingthetemperatureofthepackingenclosuresatalltimes. Theairchambershallbechargedtoa pressureof1550 psi .llteamount ofoi 1 inthedifferentialsystemshallbesuchastobringtheendof thedifferentialpistonrodflushwiththeoutsidefaceoftheglmd nut.Dryiceshallthenbeplacedinthetemperatureboxesandirmnedi
34、- atelymicrometerreadingsoftheprotrusionsofthedifferentialpiston rodandtemperoturcreadingsofthepackingenclosuresshal1 betaken andrecorded.Thesemicrometerandtemperaturereadingsshal 1 betaken at15 minuteintervolsforn periodoftimethatisrequiredto bring thetemperatureofthepackingenclosuresdown to-20”F a
35、sspecified in3.9.It shouldbenotedthati f thepockingsdo notcent ractand !eaktherewi 11 beno protrusionofthediffercntio!pistonrod.Ifthe packinghasnotleakedexcessivelythecounter-rccoi1 plungershallbe cycledasdescribedin4.S.3for100 cycleswhilemaintainingthecold conditionofthepackingenclosures.Ai r andoi
36、 I pressurereadingsshal 1 betakenundrecordedinordertodeterminetheleakagebehaviorofthe pack i ngs.Thepackingenclosuresshal1 now beallowedtorctumtoroom tempemturc.Ifnecessarytheai r and oi 1 chmnbersshallbcrechargedto theinitialconditionofthetest.Ilsccounter-recoi1 plungershal1 now becycledasdescribed
37、in4.S.3for200 cycles.Ifthepackingshave leakedorshowntendenciestofai I underthecoldtests,theadditional 200 cyclesatroom temperaturewi 1I servetoJctcrntinctherecovery characteristicsofthepackings. NIL-P- 19152A(OS) 5.PREPARATIONFOR llELIfERY G 5.1Packaging.PackagingshallbelevelA orC asspecified(see 6.
38、2). . . . - ,-,. S. 1.1LevelA.Unlessotherwisespecified,a nestingoffivepackings oftheSa-shallbepackagedinaccordancewithmethodIC- 1 orIC-3 ofMIL-P-116. S.1.2LevelC.Packagingshallbesufficienttoaffordphysical protectio-stdamageduringshipmentfromthesupplysourcetothe firstreceivingactivityforimmediateuse.
39、Thislevelmay conformto thesupplierscommercialpracticewhen suchmeetstherequirementof thislevel. 5.2Intermediatepackagin. 5.2.1LevelA.When specified,packagesshal 1 befurtherpackaged inquanti-ttoexceed10 pounds,inpaperboardorfiberboard boxesconformingtoPPP-B-566,PPP-B-636,PPP-B-66S,orPPP-B-676. 5.2.2Le
40、velC.Unlessotheisespecified,intermediatepackagingG wi 11 not-ired. S. 3Packing.PackingshallbelevelA, B, orC asspecified(see 6.2). 5.3.1LevelA.Packings,packagedasspecified,shallbepackedin containersconformingtoPPP-B-S76(class2) , PPP-B-585(class2 or3) , PPP-B-591(clsII) , PPP-B-601(overseastype), PPP
41、-B-621(class2) , PPP-B-636(weather-resistantclass), orPPP-B-640(class2).Shipping cent ainersshal 1 beclosed,strapped,or bandedinaccordancewiththe applicableboxspecification. Grossweightof wood,wood-cleated,and triple-wallboxesshallnotexceed200 pounds ; fiberboardboxesshallnot exceedtheweight-limitat
42、ionsofbox-specification.Containersshallbe.-. providedwitha caselinerconformingtoMIL- L- IOS47 and shallbesealed inaccordancewiththeappendixthereto.The caselinerwillnotbe requiredwhen theunit,intermediateorexteriorcontainerisweather- resistantorclass2 or3 fiberboard. 12 G o 0 5.3.2 shipment thatthe M
43、I L- P-19152A(OS) LcveB.Ptscl.ings,packagedasspecified,shallbepackedfor aincrsconformingtothosespecifiedforlevelA, except containersshallbeofdomesticszradc,class,type,orstyle whereapplicnblc.Box closureand strappingshal1 beinaccordancewith theapplicablecontainerspecificationorappendixthereto. S.3.3L
44、evelC.Packings, packagedasspecified,shallbepackedin a mannerrecarrieracceptanceand safedeliveryatdestinations. Containersshallconformtotherulesnndregulationsapplicabletothe mode oftrnnsportntion. S.4Markin -% In additiontoanyspecialmarking(s)specified,marking forshipmentsal 1 beinaccordancewithN1L-S
45、TD- 129. 6.NUfES 6.1Intendeduse.?hepackingscoveredbythisspecificationarefor useinthecounter-recoi1systemsofgun mounts,hydropneumaticsystems ofmissiles,aircraftcomponents,rockets,andtovedoes. 6.2Orderingdata.Procurementdocumentsshouldspecifythefollou- lng: a.Title,number,anddateofthisspecification b.
46、Applicablelistsofdrawingsandstandards(see2.1) Airpressureincount er-recoi1 systemairchauberorcomponent syst;rn(see3. 12) 4., “s ., d.IvhereJotacceptancetestswi 1I beperformedifdifferentfrom e%lectionofapplicablelevelsofpackagingandpacking(see . S.2,andS.3). 6.2.1Contractsorordersshouldspecifythefoll
47、wingprovisionsfor firstarticleinspection. 1,. 2.1.1hllttllt.rfirstarticleinspccticmisrvquir cd.When a st,ppl ier is.1: , UGII: IUCJ8: pro,-)fromcentrattocswlract,cousiJ.ration should1,SUIa I oWUI tiarticle insp,. rl i,!. ,rt41uIr(,l,Indlc.att,: 13 NIL-P- 19152A(OS) a.Wherethefirst articleinspectioni
48、s to beconducted(at the suppliersplantor at a Governmentplant) . b.Thatapprovaloffirstarticlesamplesorthewaivingofthe firstarticleinspecio.nshall,p,o, rl,ievethesupplierof hisobligation. tofulfillallotherrequirementsofthisspecificationandcontract. Custodian: Preparingactivity: Navy - OS Navy - OS (P
49、rojectNo.5330 -N046) I . .:. 14 I 1 G G o e STANDARDIZATION00 CUmENT N4PROVEUENTPROPOSAL I OMBAmrol No,l?.R2ss INSTRUCTIONS: TII. purpose .(th,. formi.t.solicitbe.el$ct.lc.mment.which=,11 help.chi.v. proc.re- me.1cdsuit. bleproducts .1re. son. bleCOS1Gnd minimumdel. y,.,will otherwseenhce useofthedocuu.e ISODc.mrl.a,s.c.vemmenlactivities,.,manuf.ctumrslnd.tswho .re F.r.sr.e.tl.csupplier%.aI the pdu, weinv, tedto.ubmtl wmmmn!a !.Ihepvemm em.Foldcm line. on fevers. aide. staple incomet.Gnd sendt wwi.CIIVW. Comm=!* bmiltd th,