1、ANSI/AGMA 9003-C17 ANSI/AGMA 9003-C17 (Revision of ANSI/AGMA 9003-B08) American National Standard Flexible Couplings Keyless Fits AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved i Flexible Couplings Keyless Fits ANSI/AGMA 9003-C17 Revision of ANSI/AGMA 9003-B08 Approval o
2、f an American National Standard requires verification by ANSI that the requirements for due process, consensus and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has bee
3、n reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American Natio
4、nal Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing or using products, processes or procedures not conforming to the standards. The American National Standards Institut
5、e does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for
6、 interpretation of this standard should be addressed to the American Gear Manufacturers Association. CAUTION NOTICE: AGMA technical publications are subject to constant improvement, revision or withdrawal as dictated by experience. Any person who refers to any AGMA Technical Publication should be su
7、re that the publication is the latest available from the Association on the subject matter. Tables or other self-supporting sections may be referenced. Citations should read: See ANSI/AGMA 9003-C17, Flexible Couplings Keyless Fits, published by the American Gear Manufacturers Association, 1001 N. Fa
8、irfax Street, Suite 500, Alexandria, Virginia 22314, http:/www.agma.org. Approved December 6, 2017 ABSTRACT This standard presents information on design, dimensions, tolerances, inspection, mounting, removal, and equipment that is in common use with keyless tapered and keyless straight (cylindrical)
9、 bore hubs for flexible couplings. Published by American Gear Manufacturers Association 1001 N. Fairfax Street, Suite 500, Alexandria, Virginia 22314 Copyright 2017 by American Gear Manufacturers Association All rights reserved. No part of this publication may be reproduced in any form, in an electr
10、onic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America ISBN: 978-1-64353-000-0 American National Standard AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved ii Contents Foreword iv 1 Scope 1 1.1 Applicab
11、ility . 1 1.2 Exclusions . 1 2 Normative references . 1 3 Terms and symbols 1 3.1 Terms 1 3.2 Symbols 1 4 Responsibility 2 5 Design considerations 3 5.1 Determination of interference fit required to transmit the specified torque . 5 5.2 Pressure required to mount or dismount hub . 6 5.3 Hub stresses
12、 . 6 5.4 Hub bore surface finish . 7 6 Configurations for hydraulic installation or removal of hubs . 7 6.1 Oil ports . 7 6.2 Oil pressure retention and O-ring design 8 7 Tapers, interference rate, and advance . 9 7.1 Tapers . 9 7.2 Interference rate, i. 9 7.3 Advance, S 9 8 Hydraulic mounting and r
13、emoval equipment 10 9 Hub inspection, mounting and removal procedures for taper bores 11 9.1 Hub-to-gage contact check . 11 9.2 Hub-to-shaft fit 11 9.3 Hub mounting 11 9.4 Hub retention 15 9.5 Hub removal procedures 15 9.6 Shaft stress relief groove in hub . 15 10 Hub inspection, mounting and remova
14、l procedures for straight cylindrical bores 15 10.1 Hub bore checking 15 10.2 Shaft checking 16 10.3 Preparation for mounting 16 10.4 Hub mounting 16 10.5 Hub removal procedure 17 10.6 Shaft stress relief groove in hub . 17 AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved
15、iii Annexes Annex A (informative) Derivation of constants 18 Annex B (informative) Typical designs and dimensions for grooving and hydraulic fitting holes . 21 Annex C (informative) Mounting and dismounting equipment 24 Annex D (informative) Example calculations 27 Annex E Bibliography . 29 Tables T
16、able 1 Symbols and definitions 2 Table 2 Hub advance per inch of shaft diameter, Sd, vs. interference rate, i, for specified diametral tapers 10 Table B.1 Typical hydraulic fitting hole dimensions, inches . 21 Table B.2 Typical oil groove dimensions, inches . 22 Table B.3 Typical shaft stress relief
17、 groove dimensions in hubs, inches 23 Figures Figure 1 Hub with multiple sections . 3 Figure 2 Flexible hub, gear tooth section influencing torque capacity and pressure . 3 Figure 3 Rigid hub, flange not influencing torque capacity and pressure 4 Figure 4 Rigid hub, flange influencing torque capacit
18、y and pressure 4 Figure 5 Bore configurations 4 Figure 6 Oil port in shaft . 7 Figure 7 Oil ports in hub . 8 Figure 8 O-ring groove locations 8 Figure 9 O-rings with back-up rings . 9 Figure 10 Typical mechanism for hydraulic mounting and removal 10 Figure 11 Initial position measurement 12 Figure 1
19、2 Measurement of hub advance . 12 Figure 13 Retaining mechanisms 14 Figure 14 Relief groove 15 Figure 15 Hub retainer plate and stress relief groove 16 Figure B.1 Hydraulic fitting holes . 21 Figure B.2 Oil injection grooves . 22 Figure B.3 Oil groove positions 23 Figure B.4 Shaft stress relief groo
20、ve in hub . 23 Figure C.1 Taper bored hub mounting and dismouting equipment (mounting shown) . 24 Figure C.2 Straight bored hub dismounting equipment . 26 AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved iv Foreword The foreword, footnotes and annexes, if any, in this docu
21、ment are provided for informational purposes only and are not to be construed as a part of AGMA 9003-C17, Flexible Couplings Keyless Fits. This standard was developed after intensive study of existing practices, standards and literature. The intent of this document is to offer to rotating equipment
22、designers and users a standard for design practice and dimensions regarding keyless fits for flexible couplings. In general, the information in this standard is a consolidation of the most common practices and standards currently in existence. This AGMA standard and related publications are based on
23、 typical or average data, conditions, or applications. Work was begun on ANSI/AGMA 9003-A91 in 1985 and was approved by the AGMA membership in February 1991. It was approved as an American National Standard on May 20, 1991. ANSI/AGMA 9003-B08 split the original standard into inch and metric versions
24、 (ANSI/AGMA 9103-B08), updated Annex B and added an example calculation as Annex D. The first draft of ANSI/AGMA 9003-B08 was made in October 2004. It was approved by the AGMA membership in October 2007. It was approved as an American National Standard on May 20, 2008. ANSI/AGMA 9003-C17 provides a
25、revised description of the effective hub to shaft engagement length, and Figure 5c has been deleted as a result. The first draft of ANSI/AGMA 9003-C17 was made in August 2016. It was approved by the membership in November 2017 and as an American National Standard on December 6, 2017. Suggestions for
26、 improvement of this standard will be welcome. They may be submitted to techagma.org. AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved v PERSONNEL of the AGMA Flexible Couplings Committee Chairman: Todd Schatzka Rexnord Industries, LLC ACTIVE MEMBERS T. Glasener. Regal Pow
27、er Transmission Solutions B. Greenlees A-C Equipment Services C. Hatseras KTR D. Konopka. Ameridrives Couplings P. Petruska . Lovejoy L. Riggs Regal Power Transmission Solutions J. Rubel Baldor Electric AGMA 2017 All rights reserved 1 AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 American National S
28、tandard Flexible Couplings Keyless Fits 1 Scope This standard presents information on design, dimensions, tolerances, inspection, mounting, removal, and equipment that is in common use with keyless tapered and keyless straight (cylindrical) bore hubs for flexible couplings. Calculated hub stress val
29、ues and hub to shaft torque capacities are nominal values. This standard does not present a rigorous analysis of the components. 1.1 Applicability This Standard applies only to hubs and solid shafts made of steel, which generally have material properties of modulus of elasticity equal to 30 106 lb/i
30、n2, density equal to 0.283 lb/in3, and thermal expansion coefficient equal to 6.36 10-6 in/in/F. 1.2 Exclusions This standard does not apply to couplings attached to shafts with keyways, splines, split hubs or polygon bores. 2 Normative references The following standards contain provisions which, th
31、rough reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibili
32、ty of applying the most recent editions of the standards indicated below. ANSI/AGMA 9002-B04, Bores and Keyways for Flexible Couplings (Inch Series) ANSI/AGMA 9009-D02, Flexible Couplings Nomenclature for Flexible Couplings 3 Terms and symbols 3.1 Terms The terms used, wherever applicable, conform t
33、o the following Standards: ANSI Y10.3-1968, Letter Symbols for Quantities Used in Mechanics of Solids ANSI/AGMA 1012-G05, Gear Nomenclature, Definition of Terms with Symbols 3.2 Symbols The symbols used in the formulas are shown in Table 1. NOTE: The symbols and definitions used in this standard may
34、 differ from other AGMA standards. The user should not assume that familiar symbols can be used without a careful study of these definitions. AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved 2 Table 1 Symbols and definitions1) Symbol Definition Units First used Ce Ratio of
35、 average bore diameter of section to outside diameter of section under consideration, Ce = Db /Do - - Eq 2 D Shaft diameter at largest end of bore in Eq 13 Db Average bore diameter of section in Eq 1 Do Outside diameter of section in Eq 2 E Modulus of elasticity lb/in2 Eq 2 I Diametral interference
36、in Eq 13 Ic Loss of interference when rotating in 5.1.4 Imax Maximum diametral interference when not rotating in Eq 4 Imin Minimum diametral interference fit required to transmit the design torque at specified speed in 5.1.4 i Interference rate in/in 7.2 L Effective length of hub to shaft engagement
37、 in Eq 1 N Specified rotational speed rpm Eq 3 p1 Calculated pressure at hub bore to mount or dismount hub due to maximum interference fit lb/in2 5.2.1 p2 Maximum recommended pressure at hub bore when mounting or dismounting the hub lb/in2 5.2.2 pmin Minimum pressure at hub bore for design torque ca
38、lculation lb/in2 5.1.3 Ra Arithmetic average of surface finish min 5.1.1 S Advance in 7.3 Sd Advance per inch of shaft diameter in/in 7.3 Sy Tensile yield strength of the selected hub material lb/in2 5.3.1 T Design torque capacity of hub-to-shaft connection lb in 5.1.2 t Taper, rate of change of dia
39、meter per unit length in/in Eq 14 Thermal expansion coefficient in/in/F Eq 17 T Required temperature difference between hub and shaft for mounting hub F Eq 17 H Maximum hoop stress in mounted hub when rotating lb/in2 Eq 7 max Maximum hub stress at hub bore due to hydraulic pressure when mounting or
40、dismounting lb/in2 5.3.1 R Radial stress at hub bore due to interference fit of mounted hub while rotating lb/in2 Eq 7 Rv Radial stress in hub due to rotational speed lb/in2 Eq 7 rot Combined stress in hub when rotating lb/in2 Eq 7 v Hoop stress in hub due to rotational speed lb/in2 Eq 7 Apparent co
41、efficient of friction - - 5.1.1 NOTE: 1) Equations in this standard require the use of consistent units. 4 Responsibility The purchaser has the sole responsibility for specifying the peak torque and all other pertinent loading and operating information affecting the hub-to-shaft juncture. The machin
42、e designer is totally responsible for the design of the hub-to-shaft juncture. The sole responsibility of the coupling manufacturer is to provide hubs designed and manufactured according to the purchasers specifications. AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved 3 C
43、ompliance with this standard does not constitute a warranty of the rating of the hub to shaft juncture under installed conditions. This standard only applies to the hub design. There can be personal injury or catastrophic failure of the shaft or hub-to-shaft juncture as a result of incorrect design,
44、 installation, or removal error, or other factors unrelated to the hub design. WARNING: When working with hydraulic mounting and removal equipment EXTREME care and caution must be used to prevent personal injury and damage to equipment due to explosive axial movement at the time of hub release. 5 De
45、sign considerations The design of keyless fits in power transmission couplings is based on the calculations required for the safe transmission of the specified torque through the coupling hub-to-shaft juncture. These calculations consist of the following: a) The interference fit required to transmit
46、 the specified torque; b) The pressures involved in mounting and dismounting the hub; c) The stresses in the hub during mounting or dismounting and during operation. The equations in the following sections for hub pressures and stresses account for hubs of substantially uniform cross sections. The e
47、quation for torque capacity of the hub-to-shaft juncture assumes the hub outside diameter is uniform and equal to the outside diameter of the minimum hub section. The torque as calculated is conservatively low. When a hub has multiple outside diameters such as shown in Figure 1, the hub can be split
48、 into sections and the torque capacity of each section calculated separately. The total capacity is the sum of the separate section capacities. Hub configuration must be considered when performing stress and mounting pressure calculations (see Figures 1, 2, 3, and 4). Shrink or interference fit anal
49、ysis is generally based on Lames equations for a thick walled cylinder under internal pressure. Figure 1 Hub with multiple sections Figure 2 Flexible hub, gear tooth section influencing torque capacity and pressure AMERICAN NATIONAL STANDARD ANSI/AGMA 9003-C17 AGMA 2017 All rights reserved 4 Figure 3 Rigid hub, flange not influencing torque capacity and pressure Figure 4 Rigid hub, flange influencing torque capacity and pressure The bore used in the determination
