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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 10585 (2002): Method of Test for Cylinders for Oil Hydraulic Systems [PGD 16: Fluid Power] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” 1 IS 10585:2002 ad $wmld % * mid “*@kiP-rfaR (w 3mf~~) Indian Standard METHOD OF TEST FOR CYLINDERS FOR OIL HYDRAULIC SYSTEMS (First Revision ) ICS 23.100.20 0 BIS2002 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 March 2002 Price Group 2 Hydraulic Fluid Power Systems Sectional Committee, BP 15 FOREWORD This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Hydraulic Fluid Power Systems Sectional Committee had been approved by the Basic and Production Engineering Division Council. In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure in an enclosed circuit. One component of such systems is the hydraulic fluid power cylinder. This is a device that converts power into linear mechanical force and motion. Itconsists of amovable element, that is apiston and piston rod, operating within a cylindrical bore. This standard was first published in 1983.This revision has been taken up to include cushioning test in line with ISO 10100: 1990 ‘Hydraulic fluid power — Cylinders — Acceptance test’ issued by the International Organization for Standardization (1S0). This revision also includes Amendment No. 1to IS 10585:1983. For thepurpose ofdeciding whether aparticular requirement ofthis standard iscomplied with, the finalvalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2:1960 ‘Rulesforrounding offnumerical values (revised)’, Thenumber ofsignificant places retained inthe rounded off value should be the same asthat ofthe specified value in this standard. IS 10585:2002 Indian Standard METHOD OF TEST FOR CYLINDERS FOR OIL HYDRAULIC SYSTEMS (First Revision ) 1SCOPE 4.3 The test fluid shall be as per manufacturer’s recommendation. Theproofpressureandstaticfriction This standard prescribes the method of test for characteristics may be tested at ambient conditions. evaluating the performance requirements of double The internal leakage and endurance test shall be acting cylinders used in oil hydraulic systems. carried out at 50* 2°C of the test fluid in the case of NOTE — While thevariation inthestandardreferstoaaingle- mineral oil.Incase ofother fluids thetemperature for rod-crrdcdcylinder, thetestprocedureisapplicabletodouble-rod- test shall be as agreed to between the manufacturer endedtypealso. and the user. 2REFERENCE 4.4 The requirement of filtration of the test fluid in The following Indian Standard contains provisions the circuit shall be as per manufacturer’s which through reference in this text, constitute recommendation. provisions ofthisstandard.Atthetimeofpublication, 4.5 The accuracy of measurement of pressure shall theeditionindicatedwasvalid.Thestandardissubject be* 3percent. to revision and parties to agreements based on this standard are encouraged to investigate thepossibility 5TEST PROCEDURE of applying the most recent edition of the standard indicated below: 5.1Proof Pressure Test IS No. Title Keeping the piston at its mid-stroke and the rod secured to a test fixture, each end of the piston shall 10416: 1992/ Fluidpowersystemsandcomponents inturn bepressurized gradually to 1.5times therated 1S0 5598:1985 vocabulary (firsretvision) pressure and held there at for a duration of 3 min. 3DEFINITIONS The other port shall be vented during this period. Check for external leakage at ports, end weldments 3.1 Rated Pressure ‘O’rings rod seal. The qualified maximum operating p ressure which is recommended for a component or a system by the NOTE — Forroutineinspectiontests,theproofpressuretestmay be limited to check cylinders aspressure vessels, on mutual manufacturer. agreementbetween themanufacturer andtheuser.The cylinders shallthenbetestedatendpositions only without anchoring the 3.2Proof Pressure rod. Testpressure, inexcessoftheratedoperatingpressure, 5.2 Static Internal Leakage which causes no permanent deformation, excessive external leakage or other malfunction. 5.2.1 Acylinderwhichhassuccessfully completed the proofpressure testinaccordance with5.1shallqualify 3.3 Static Friction (Packing Drag) for this test. Thebreakaway force (pressure) required tomove the 5.2.2Thetestcylindershallbestrokedadequatelyprior piston with all external forces (either mechanical or to test run to eliminate entrapped air and to establish hydraulic) removed or in balance. the test temperature. 3.4 Other terms/definitions used shall be as per 5.2.3Thepistonrodshallbepositioned filly extended, IS 10416. the rod end port shall be vented and the cap end port shall be pressurized to the rated working pressure. 4 TEST CONDITIONS AND EQUIPMENT 5.2.4Theoilflow fromtheopenport over aperiod of 4.1 Suitable test rigs shall be made to carry out the 3 rein, starting from 30 s after attaining the required different tests specified in this standard. testpressure shall be measured and recorded. 4.2 The test cylinder shall be mounted as p er 5.2.5 Thepressure behind thepiston shallbe reduced manufacturer’s recommendation. to3percent oftheratedpressure andthemeasurement 1 IS 10585:2002 in accordance with 5.2.4 shall be repeated. NOTES 1Forstrokeslongerthan200 mm, themeasurementshallbedone 5.2.6 The port connections shall be interchanged and atmid-stroke also. the tests in accordance with 5.2.3 to 5.2.5 shall be 2 Tbe measurement at the ends shall be outside the cushion repeated with the piston rod fully retracted. region. 3Thecylinders shallbetestedinahorizontal position. NOTE — For strokeslonger than200 mm, theinternal leakage testshalIbecarried outatmid-stroke also. 5.4Cushioning Test 5.3 Static Friction/Packing Drag (Breakaway Whenthethrottlescrewsordamping valvesareclosed Pressure) on commencement of cushioning, the cylinder rod should show a marked deceleration before the end 5.3.1 A cylinder which has successfully passed the stroke is reached. proofpressuretestinaccordancewith5.1andthestatic internal leakage test in accordance with 5.2 shall be 5.5Endurance Test used for this test. 5.5.1 A cylinder which has successfully passed the 5.3.2 The cylinder shall be connected to a pressure proof pressure test shall be used for this test. source and reciprocated in the test rig for a proper run-in and ensure defined breakaway pressure. 5.5.2 The cylinder shall be subjected to an internal leakage test in accordance with 5.2. 5.3.3 The piston rod shall be fully retracted and the pressure source connected to the cap end port. The 5.5.3 The cylinder shall be mounted in an endurance rod end port shall be vented. Two minutes after so testrigandcycledendtoendexcluding cushionregion positioning, thecapendshallbegradually pressurized at 130 percent of rated pressure. Another hydraulic to initiate the piston rod movement. The breakaway cylinder connected in line can be used conveniently pressure shall be recorded. for loading the test cylinder externally (Fig. 1).The rate of pressure rise in the cylinder, the cycling rate 5.3.4Thepistonrodshallbepositioned fullyextended. andthetotalnumber ofcycles shallbeasagreed upon The rod end port shall be connected to the pressure between the manufacturer and the user. source and the other port shall be vented. The measurement in accordance with 5.3.3 shall be 5.5.4Externalleakage shallbemeasured andrecorded repeated to obtain the breakaway pressure on the rod after therun-in test end subsequently atevery 10000 end. cycles tillcompletion of endurance test. CYLINDER UNDER TEST LOAD CYLIND.ER J CAP END CAP END PRESSURE 4 IRELIEF VALVES GAUGES I II II CHE‘ACLKWVECHECK ‘ALVE u II - I)(I= RELIEF f VALVE , 1#1 DIRECTIONAL L.J VALVE -- FILTER RELIEF ‘- FILTER -1 VALVE --J HEAT HEAT PUMP EXCHANGER PUMP EXCHANGER @ I I &ARGING FIG. 1SCHEMATIC DIAGRAM FOR ENDURANCE TEST 2 IS 10585:2002 5.5.5 The cylinder shall be subjected to an internal be presented as the static friction characteristics of I leakagetestinaccordance with5.2atmidway through the cylinder (see Table 1). and at the end of endurance test. 6.4 The behaviour of the cylinder over the period of NOTE — The testcylinder shallnotbemodified orrepaired be- endurance test may be presented by plotting internal fore orduring the endurance test, Pinjoints atmounting shall andexternalleakageorrodleakageagainstthenumber however begreasedoroiled ifnecessary. ofcycles, along with the test conditions. 6TEST RESULTS 7CLASSIFICATION OF TESTS 5.1 The cylinder shall be considered as having successfully passed the proof pressure test, if no 7.1 Routine Inspection Tests evidence is recorded of any permanent deformation, Routine inspection tests shall constitute the modified structural failure or external loss of fluid other than proof pressure test given in 5.1 and internal leakage through vented port during theproof pressure test. test given in 5.2. 6.2Fromthevaluesmeasured in5.2,thestaticinternal 7.2Type Tests leakage shallbe computed and presented in terms of cubic centimetre/min (see Table 1). Type testsshallconstitute allthetests specified at5.1 to 5.5. 6.3 The break away pressure in either direction shall Table 1Proforma for Test Results (Clauses 6.2and 6.3) Manufacturer: TypeNo.: Specifications ofcylinde~ Testfluid: Type: Viscosity, m2/s(cSt): Temperature, K(”C): SI Test Measured Valve Remarks v, 0. or Observation 1. Proofpressure Testpressure,bar(kgf/ cm2) 2. Static friction, bar(kgf/cm 2 ) orN (kgf) Rodend Capend Mid-stroke — Rodend Mid-stroke — Capend 3. Internal, leakage, cm3/min: Rodend— Cylinder retracted Capend— Cylinder extended Rodend— Mid-stroke Cap end— Mid stroke Testpressure,bar(kgflcmz) 4. Cushioning test Testpressure,bar(kgflcmz) 5. Endurance test Testpressure,bar(kgf/cm2) Rateofpressure,bar/s(kgf/cm2/s) Cycle rate/rein No. ofcycles Graphs : Internal leakage versusnumber ofcycles. 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