AGMA 940-A09-2009 Double Helical Epicyclic Gear Units《双螺旋行星齿轮组》.pdf
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1、AGMA 940-A09AGMA Information SheetDouble Helical Epicyclic GearUnitsAGMA940-A09iiDouble Helical Epicyclic Gear UnitsAGMA 940-A09CAUTION NOTICE: AGMA technical publications are subject to constant improvement,revision or withdrawal as dictated by experience. Any person who refers to any AGMAtechnical
2、publicationshouldbesurethatthepublicationisthelatestavailablefromtheAs-sociation on the subject matter.Tablesorotherself-supportingsectionsmaybereferenced. Citationsshouldread: SeeAGMA 940-A09, Double Helical Epicyclic Gear Units, published by the American GearManufacturersAssociation,1001N.FairfaxS
3、treet,5thFloor,Alexandria,Virginia 22314,http:/www.agma.org.Approved January 6, 2009ABSTRACTThisinformationsheetaddressesepicyclicgeardriveswhichutilizedoublehelicaltypegearingontheplanetaryelements. It is intended to be a supplement to and used in conjunction with ANSI/AGMA 6123-B06, DesignManualfo
4、rEnclosedEpicyclicGearDives. Itcoversonlythosetopicswhichareuniquetodoublehelicalgeararrangements in epicyclic gear drives.Notable features include the addition of a factor to account for load distribution between the helices of thedouble helical elements, KDH, and discussion of assembly considerati
5、ons.Published byAmerican Gear Manufacturers Association1001 N. Fairfax Street, 5thFloor, Alexandria, Virginia 22314Copyright 2009 by American Gear Manufacturers AssociationAll rights reserved.No part of this publication may be reproduced in any form, in an electronicretrieval system or otherwise, wi
6、thout prior written permission of the publisher.Printed in the United States of AmericaISBN: 978-1-55589-953-0AmericanGearManufacturersAssociationAGMA 940-A09AMERICAN GEAR MANUFACTURERS ASSOCIATIONiii AGMA 2009 - All rights reservedContentsForeword v1 Scope 1.2 Normative references 1.3 Symbols and t
7、erminology 14 Applications 14.1 Introduction to double helical gears 24.2 When to use double helical gears 44.3 Advantages 4.4.4 Disadvantages 44.5 Face to diameter ratio considerations 4.4.6 Configurations 54.7 System dynamics 54.7.1 Vibration analysis, dynamic loads 54.7.2 Natural frequencies 64.7
8、.3 System induced failure 6.4.7.4 Load sharing 64.7.5 Rotational speed 65 Epicyclic gearing arrangements 7.5.1 Fixed element 7.5.2 Types 75.2.1 Coupled epicyclics 7.5.2.2 Differential planetary 7.5.3 Epicyclic speed ratios 75.3.1 Coupled and compound-coupled planetaries 75.4 Relative speeds 8.6 Mesh
9、ing and assembly requirements 86.1 Assembly 8.6.2 Other meshing and assembly requirements 8.7 Tooth geometry 8.8 Circulating power 8.9 Load sharing 8.10 Double helical epicyclic drives 810.1 Mesh load share 8.10.1.1 Load sharing between planets 9.10.1.2 Load sharing between helices 9.10.1.3 Load dis
10、tribution factor, KH9.10.2 Special considerations for bearing selection and application 9.10.2.1 Bearing deformation 9.10.2.2 Dynamics in double helical epicyclic units 10.10.3 Special considerations for couplings and spline connections 10.10.3.1 Design and application of sliding, crowned splines 10
11、.10.3.2 Spline lubrication 1010.4 Special considerations for joining double helical components 1010.4.1 Ring gears 11.10.4.2 Sun pinion 11.10.4.3 Planet gears 11.10.4.4 Planet carrier design considerations 11.11 Thermal power rating 11.12 Lubrication 11Bibliography 22.AGMA 940-A09 AMERICAN GEAR MANU
12、FACTURERS ASSOCIATIONiv AGMA 2009 - All rights reservedAnnexesA Stoeckicht epicyclic drives 13.B Double helical epicyclic gear drive with minimum gap using assembled single helical components 17.C Double helical epicyclic with stationary carrier and bearing supported sun pinion 19D Double helical ep
13、icyclic gear drive 20Tables1 Symbols 2.Figures1 Double helical pinion 22 Double helical gear set 23 Examples of double helical epicyclic arrangements 34 Staggered tooth design 11.5 Non-staggered tooth design 116 Apex leading versus apex trailing 12.AGMA 940-A09AMERICAN GEAR MANUFACTURERS ASSOCIATION
14、v AGMA 2009 - All rights reservedForewordTheforeword,footnotesandannexes,ifany,inthisdocumentareprovidedforinformationalpurposesonlyandare not to be construed as a part of AGMA Information Sheet 940-A09, Double Helical Epicyclic Gear Units.Thepurposeofthisinformationsheetistoprovidespecification,com
15、parisonanddesigndatafordoublehelicalepicyclic gear units as a supplement to ANSI/AGMA 6123-B06, Design Manual for Enclosed Epicyclic GearDrives. While the scope of ANSI/AGMA 6123-B06 includes only spur and single helical epicyclic drives, asignificant portion of the material presented is applicable
16、to the double helical configuration and will bereferenced by this information sheet.Thedoublehelicalepicyclicconfigurationisgenerallyusedwhenitisdesiredtomaximizepowerdensity. Thisinformationsheetwilldiscusstheconsiderationsandcomplexitiesofthedoublehelicalepicyclicswhichincludeapplication, arrangem
17、ents, meshing/assembly, load sharing, lubrication and components (gearing, bearings,splines and carriers).The formulas presented or referenced in this information sheet contain numerous terms whose individualvaluescanvarysignificantlydependingonapplication,systemeffects,accuracyandmanufacturingmetho
18、ds.Proper evaluation of these terms is essential for realistic rating. The knowledge and judgment required toproperly evaluate the various rating factors comes primarily from years of accumulated experience indesigning,testing,manufacturingandoperatingsimilargearunits. Thedetailedtreatmentofthegener
19、alratingformulas for specific product applications is best accomplished by those experienced in the field.ThisinformationsheetisdedicatedtoDonMcVittie.Hisparticipationandinspirationledtothedevelopmentofthis information sheet. Mr. McVittie was the first Chairman of the Epicyclic Enclosed Drives Commi
20、ttee. Histhoroughnessandenthusiasmforgearing,alongwithhiscontributions,aswellasthecontributionsofhisfellowcommittee members brought out the best information from the committee as a whole.The first draft of AGMA 940-A09 was made in May, 2005. It was approved by the AGMA Technical DivisionExecutive Co
21、mmittee in January, 2009.Suggestions for improvement of this document will be welcome. They should be sent to the American GearManufacturers Association, 1001 N. Fairfax Street, 5thFloor, Alexandria, Virginia 22314.AGMA 940-A09 AMERICAN GEAR MANUFACTURERS ASSOCIATIONvi AGMA 2009 - All rights reserve
22、dPERSONNEL of the AGMA Epicyclic Enclosed Drives CommitteeChairman: Octave A. LaBath Gear Consulting Services of Cincinnati, LLCACTIVE MEMBERSJ.B. Amendola, Sr. Artec Machine SystemsM.R. Chaplin Consultant.J.R. Dammon Fairfield Manufacturing Co., Inc.R.L. Errichello GeartechR.A. Geary Comer Industri
23、es, Inc.U. Giger GDC Urs Giger GmbH.E.C. Hahlbeck Powertrain Engineers, IncJ.M. Hawkins Sikorsky Aircraft CorporationV. Kirov Merit Gear Corporation.T. Klaves Milwaukee Gear CompanyS.J. Matovic Horsburgh - apex runout, sometimes referred to as axial runout or apex wobble;- effects which influence ge
24、ar face load distribution;- special considerations for load sharing;- special considerations applicable to floating ring designs.Double helical epicyclic gear units with pitchline velocities in excess of 35 meters per second and aircraftpropulsion gears are excluded.This information sheet is a suppl
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