ANSI AGMA 9003-B08-2008 Flexible Couplings - Keyless Fits.pdf

1、ANSI/AGMA 9003-B08Revision of ANSI/AGMA 9003-A91Reaffirmed June 2014American National StandardFlexible Couplings -Keyless FitsANSI/AGMA9003-B08iiFlexible Couplings - Keyless FitsANSI/AGMA 9003-B08Revision of ANSI/AGMA 9003-A91ApprovalofanAmericanNationalStandardrequiresverificationbyANSIthattherequi

2、re-ments for due process, consensus, and other criteria for approval have been met by thestandards developer.Consensusisestablishedwhen,inthejudgmentoftheANSIBoardofStandardsReview,substantial agreement has been reached by directly and materially affected interests.Substantialagreementmeansmuchmoret

3、hanasimplemajority,butnotnecessarilyuna-nimity. Consensus requires that all views and objections be considered, and that aconcerted effort be made toward their resolution.TheuseofAmericanNationalStandardsiscompletelyvoluntary;theirexistencedoesnotin any respect preclude anyone, whether he has approv

4、ed the standards or not, frommanufacturing, marketing, purchasing, or using products, processes, or procedures notconforming to the standards.The American National Standards Institute does not develop standards and will in nocircumstances give an interpretation of any American National Standard. Mor

5、eover, noperson shall have the right or authority to issue an interpretation of an American NationalStandardinthenameoftheAmericanNationalStandardsInstitute. Requestsforinterpre-tation of this standard should be addressed to the American Gear ManufacturersAssociation.CAUTION NOTICE: AGMA technical p

6、ublications are subject to constant improvement,revision, or withdrawal as dictated by experience. Any person who refers to any AGMAtechnical publication should be sure that the publication is the latest available from theAssociation on the subject matter.Tables orotherself-supportingsections may be

7、referenced. Citations shouldread: SeeANSI/AGMA 9003-B08, Flexible Couplings - Keyless Fits, published by the AmericanGearManufacturersAssociation,500MontgomeryStreet,Suite350,Alexandria,Virginia22314, http:/www.agma.org.Approved May 20, 2008ABSTRACTThis standard presents information on design, dimen

8、sions, tolerances, inspection, mounting, removal, andequipment that is in common use with keyless tapered and keyless straight (cylindrical) bore hubs for flexiblecouplings.Published byAmerican Gear Manufacturers Association500 Montgomery Street, Suite 350, Alexandria, Virginia 22314Copyright 2008 b

9、y American Gear Manufacturers AssociationAll rights reserved.No part of this publication may be reproduced in any form, in an electronicretrieval system or otherwise, without prior written permission of the publisher.Printed in the United States of AmericaISBN: 978-1-55589-924-0AmericanNationalStand

10、ardANSI/AGMA 9003-B08AMERICAN NATIONAL STANDARDiii AGMA 2008 - All rights reservedContentsForeword iv1 Scope 12 Normative references 13 Terms and symbols 14 Responsibility 1.5 Design considerations 26 Configurations for hydraulic installation or removal of hubs 57 Tapers, interference rate, and adva

11、nce 6.8 Hydraulic mounting and removal equipment 7.9 Hub inspection, mounting and removal procedures for taper bores 8.10 Hub inspection, mounting and removal procedures for straight cylindricalbores 11.Bibliography 22AnnexesA Derivation of constants 13B Typical designs and dimensions for grooving a

12、nd hydraulic fitting holes 15C Mounting and dismounting equipment 17.D Example calculations 20.Figures1 Hub with multiple sections 32 Flexible hub, gear tooth section influencing torque capacity and pressure 3.3 Rigid hub, flange not influencing torque capacity and pressure 34 Rigid hub, flange infl

13、uencing torque capacity and pressure 35 Bore configurations 36 Oil port in shaft 67 Oil ports in hub 68 O-ring groove locations 69 O-ringswithback-uprings 6.10 Typical mechanism for hydraulic mounting and removal 811 Initial position measurement 912 Measurement of hub advance 9.13 Retaining mechanis

14、ms 1014 Relief groove 1115 Hub retainer plate and stress relief groove 12.Tables1 Symbols and definitions 22 Hub advance per inch of shaft diameter, Sd, vs. interference rate, i,forspecified diametral tapers 7ANSI/AGMA 9003-B08 AMERICAN NATIONAL STANDARDiv AGMA 2008 - All rights reservedForewordThe

15、foreword, footnotes and annexes, if any, in this document are provided forinformational purposes only and are not to be construed as a part of ANSI/AGMA9003-B08, Flexible Couplings - Keyless Fits.This standard was developed after intensive study of existing practices, standards andliterature.Theinte

16、ntofthisdocumentistooffertorotatingequipmentdesignersandusersastandardfordesignpracticeanddimensionsregardingkeylessfitsforflexiblecouplings. Ingeneral, the information in this standard is a consolidation of the most common practicesand standards currently in existence.This AGMA standard and related

17、 publications are based on typical or average data,conditions, or applications.Work was begun on ANSI/AGMA 9003-A91 in 1985 and was approved by the AGMAmembership in February 1991. It was approved as an American National Standard onMay 20, 1991.ANSI/AGMA 9003-B08 split the original standard into inc

18、h and metric versions(ANSI/AGMA9103-B08),updatedannexBandaddedanexamplecalculationasannexD.ThefirstdraftofANSI/AGMA9003-B08wasmadeinOctober,2004. ItwasapprovedbytheAGMA membership in October, 2007. It was approved as an American National Standardon May 20, 2008.Suggestions for improvement of this st

19、andard will be welcome. They should besent to theAmericanGearManufacturersAssociation,500MontgomeryStreet,Suite350,Alexandria,Virginia 22314.ANSI/AGMA 9003-B08AMERICAN NATIONAL STANDARDv AGMA 2008 - All rights reservedPERSONNEL of the AGMA Flexible Couplings CommitteeChairman: Glenn Pokrandt Rexnord

20、 Industries Coupling Operations.Vice Chairman: James Paluh Ameridrives Gear Coupling Operations.ACTIVE MEMBERST. Hewitt Lord Corporation.D. Hindman Rexnord Industries Coupling OperationsD. Lyle Ameridrives Gear Coupling Operations.H.A. Lynn, III Rexnord Industries Coupling OperationsJ.W. Mahan Lovej

21、oy, Inc.J.R. Mancuso Kop-Flex/Emerson Power Transmission.G.E. Saunders Ameridrives Gear Coupling OperationsT. Schatzka Rexnord Industries, IncJ. Sherred Ameridrives Gear Coupling OperationsJ. Smihal T.B. Woods, IncR. Whitney Riverhawk Company.ANSI/AGMA 9003-B08 AMERICAN NATIONAL STANDARDvi AGMA 2008

22、 - All rights reserved(This page is intentionally blank)1 AGMA 2008 - All rights reservedANSI/AGMA 9003-B08AMERICAN NATIONAL STANDARDAmerican National Standard -Flexible Couplings -Keyless Fits1ScopeThis standard presents information on design,dimensions, tolerances, inspection, mounting, re-moval,

23、and equipment that is in common use withkeyless tapered and keyless straight (cylindrical)bore hubs for flexible couplings. Calculated hubstress values and hub to shaft torque capacities arenominal values. This standard does not present arigorous analysis of the components.1.1 ApplicabilityThis Stan

24、dard applies only to hubs and solid shaftsmadeofsteel,whichgenerallyhavematerialproper-ties of modulus of elasticity equal to 30 x 106lb/in2,densityequalto0.283 lb/in3,and thermalexpansioncoefficient equal to 6.36 x 10- 6in/in/F.1.2 ExclusionsThis standard does not apply to couplings attachedtoshaft

25、swithkeyways,splines,splithubsorpolygonbores.2 Normative referencesThe following standards contain provisions which,throughreferenceinthistext,constituteprovisionsofthis American National Standard. At the time ofpublication, the editions indicated were valid. Allstandards are subject to revision, an

26、d parties toagreements based on this American National Stan-dard are encouraged to investigate the possibility ofapplying the most recent editions of the standardsindicated below.ANSI/AGMA 9002-B04, Bores and Keyways forFlexible Couplings (Inch Series)ANSI/AGMA 9009-D02, Flexible Couplings -Nomencla

27、ture for Flexible Couplings3 Terms and symbols3.1 TermsThetermsused,whereverapplicable,conformtothefollowing Standards:ANSI Y10.3-1968, Letter Symbols for QuantitiesUsed in Mechanics of SolidsANSi/AGMA 1012-G05, Gear Nomenclature, Defi-nition of Terms with Symbols3.2 SymbolsThe symbols used in the f

28、ormulas are shown intable 1.NOTE: The symbols and definitions used in this stan-dard may differ from other AGMA standards. The usershould not assume that familiar symbols can be usedwithout a careful study of these definitions.4 ResponsibilityThepurchaserhasthesoleresponsibilityforspecify-ing the pe

29、ak torque and all other pertinent loadingandoperatinginformationaffectingthehub-to-shaftjuncture. The machine designer is totally responsi-ble for the design of the hub-to-shaft juncture. Thesole responsibility of the coupling manufacturer is toprovidehubsdesignedandmanufacturedaccordingto the purch

30、asers specifications.Compliance with this standard does not constitute awarranty of the rating of the hub to shaft junctureunder installed conditions. This standard onlyapplies to the hub design. There can be personalinjury or catastrophic failure of the shaft or hub-to-shaft juncture as a result of

31、 incorrect design,installation, or removal error, or other factorsunrelated to the hub design.WARNING: When working with hydraulic mountingand removal equipment EXTREME care and cautionmustbeusedtopreventpersonalinjuryanddamagetoequipmentduetoexplosiveaxialmovementatthetimeof hub release.ANSI/AGMA 9

32、003-B08 AMERICAN NATIONAL STANDARD2 AGMA 2008 - All rights reservedTable 1 - Symbols and definitions1)Symbol Definition Units First usedCeRatio of average bore diameter of section to outside diameterof section under consideration, Ce= Db/ Do- - Eq 2D Shaft diameter at largest end of bore in Eq 13DbA

33、verage bore diameter of section in Eq 1DoOutside diameter of section in Eq 2E Modulus of elasticity lb/in2Eq 2I Diametral interference in Eq 13IcLoss of interference when rotating in 5.1.4ImaxMaximum diametral interference when not rotating in Eq 4IminMinimum diametral interference fit required to t

34、ransmit thedesign torque at specified speedin 5.1.4i Interference rate in/in 7.2L Length of hub engagement in Eq 1N Specified rotational speed rpm Eq 3p1Calculated pressure at hub bore to mount or dismount hub dueto maximum interference fitlb/in25.2.1p2Maximum recommended pressure at hub bore when m

35、ountingor dismounting the hublb/in25.2.2pminMinimum pressure at hub bore for design torque calculation lb/in25.1.3Ra Arithmetic average of surface finish min 5.1.1S Advance in 7.3SdAdvance per inch of shaft diameter in/in 7.3SyTensile yield strength of the selected hub material lb/in25.3.1T Design t

36、orque capacity of hub-to-shaft connection lb in 5.1.2t Taper, rate of change of diameter per unit length in/in Eq 14 Thermal expansion coefficient in/in/F Eq 17T Required temperature difference between hub and shaft formounting hubF Eq 17HMaximum hoop stress in mounted hub when rotating lb/in2Eq 7ma

37、xMaximum hub stress at hub bore due to hydraulic pressurewhen mounting or dismountinglb/in25.3.1RRadial stress at hub bore due to interference fit of mounted hubwhile rotatinglb/in2Eq 7RvRadial stress in hub due to rotational speed lb/in2Eq 7rotCombined stress in hub when rotating lb/in2Eq 7vHoop st

38、ress in hub due to rotational speed lb/in2Eq 7m Apparent coefficient of friction - - 5.1.1NOTE1)Equations in this standard require the use of consistent units.5 Design considerationsThe design of keyless fits in power transmissioncouplings is based on the calculations required forthesafetransmission

39、ofthespecifiedtorquethroughthe coupling hub-to-shaft juncture. These calcula-tions consist of the following:a) The interference fit required to transmit thespecified torque;b) The pressures involved in mounting anddismounting the hub;c) The stresses in the hub during mounting ordismounting and durin

40、g operation.ANSI/AGMA 9003-B08AMERICAN NATIONAL STANDARD3 AGMA 2008 - All rights reservedThe equations in the following sections for hubpressuresandstressesaccountforhubsofsubstan-tiallyuniformcrosssections. Theequationfortorquecapacity of the hub-to-shaft juncture assumes thehub outside diameter is

41、 uniform and equal to theoutside diameter of the minimum hub section. Thetorque as calculated is conservatively low.When a hub has multiple outside diameters such asshowninfigure1,thehubcanbesplitintosectionsand the torque capacity of each section calculatedseparately. The total capacity is the sum

42、of theseparatesectioncapacities. Hubconfigurationmustbe considered when performing stress and mount-ingpressurecalculations(seefigures1,2,3,and4).Shrink or interference fit analysis is generally basedonLamesequationsforathickwalledcylinderunderinternal pressure.DbDo2231Do1Do3L1L2L3Figure 1 - Hub wit

43、h multiple sectionsFigure 2 - Flexible hub, gear tooth sectioninfluencing torque capacity and pressureFigure 3 - Rigid hub, flange not influencingtorque capacity and pressureFigure 4 - Rigid hub, flange influencing torquecapacity and pressureTheboreusedinthedeterminationofthepressurefor tapered and

44、cylindrical bore configurations is asshowninfigure5. Thefollowingequationsarebasedon the assumption that the shaft and hub havesubstantially equal surface finish, hardness, andmodulus of elasticity.LDbDoD(a) TaperedLDbDoD(b) Cylindrical(c) GroovedLFigure 5 - Bore configurationsANSI/AGMA 9003-B08 AME

45、RICAN NATIONAL STANDARD4 AGMA 2008 - All rights reserved5.1 Determination of interference fit required totransmit the specified torqueThe interference fit required is dependent upon thedesign torque to be transmitted, the coefficient offriction selected, the physical dimensions of the huband the spe

46、cified speed of operation. The interfer-ence fit range is determined by either the minimum/maximum shaft and bore diameters for cylindricalbores,orbytheminimum/maximumhubadvancefortapered bores.5.1.1 Apparent coefficient of friction, mThe apparent coefficient of friction, m between thehub and shaft

47、can vary widely depending on suchfactors as cleanliness, oil type, contact pattern,surface finish and rate of load application. Valueswhich are widely used are:m = 0.12 to 0.15 if hydraulically mounted with eachsurface having a finish of 32 microinches Ramaximum, and adequate draining time aftermoun

48、ting.m 0.15 to 0.20 if heat-shrink mounted with cleanand dry surfaces, each having a surface finish of 32microinches Ra maximum.5.1.2 Design torque capacity of hub-to-shaftfit, TThedesigntorquecapacity, T, ofthe hub-to-shaft fitis a function of the hub dimensions, the interferencefit, the hub and sh

49、aft material, centrifugal expansionand coefficient of friction. The design capacityshould exceed the peak torque of the application.When the peak torque is well defined, the hub toshafttorquecapacityshouldexceedthepeaktorqueby a minimum factor of 1.15. When the peak torqueisnotwelldefined,thisfactorshouldbeincreasedorbasedonexperiencewith similar applications.NOTE: The peak torque is the highest value of torqueapplied at the hub-to-shaft fit.5.1.3 Minimum pressure at the h