Calculation Of Load Capacity Of Spur And Helical Gears
ISO/TSTECHNICALThis is a preview of "ISO/TS 6336-22:2018". Click here to purchase the full version from the ANSI store.SPECIFICATION6336-22First edition2018-08Calculation of load capacity of spurand helical gears —Part 22:Calculation of micropitting loadcapacityCalcul de la capacité de charge des engrenages cylindriques àdentures droite et hélicoïdale —Partie 22: Calcul de la capacité de charge aux micropiqûresReference numberISO/TS 6336-22:2018(E) ISO 2018
ISO/TS 6336-22:2018(E) This is a preview of "ISO/TS 6336-22:2018". Click here to purchase the full version from the ANSI store.COPYRIGHT PROTECTED DOCUMENT ISO 2018All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication maybe reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or postingon the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the addressbelow or ISO’s member body in the country of the requester.ISO copyright officeCP 401 Ch. de Blandonnet 8CH-1214 Vernier, GenevaPhone: 41 22 749 01 11Fax: 41 22 749 09 47Email: copyright@iso.orgWebsite: www.iso.orgPublished in Switzerlandii ISO 2018 – All rights reserved
ISO/TS 6336-22:2018(E) This is a preview of "ISO/TS 6336-22:2018". Click here to purchase the full version from the ANSI store.Contents PageForeword.vIntroduction. vi1234567891011Scope. 1Normative references. 1Terms, definitions, symbols and units. 13.1Terms and definitions. 13.2Symbols and units. 2Micropitting. 4Basic formulae. 55.1General. 55.2Safety factor against micropitting, Sλ . 65.3Local specific lubricant film thickness, λGF,Y . 65.4Permissible specific lubricant film thickness, λGFP . 75.5Recommendation for the minimum safety factor against micropitting, Sλ,min . 8Material parameter, GM . 96.1General. 96.2Reduced modulus of elasticity, Er . 106.3Pressure viscocity coefficient at bulk temperature, αθM . 10Local velocity parameter, UY .117.1General. 117.2Sum of tangential velocities, vΣ,Y . 117.3Dynamic viscosity at bulk temperature, ηθM . 127.3.1General. 127.3.2Kinematic viscosity at bulk temperature, νθM . 127.3.3Density of the lubricant at bulk temperature, ρθM . 12Local load parameter, WY .138.1General. 138.2Local Hertzian contact stress, pdyn,Y,A, according to Method A. 138.3Local Hertzian contact stress, pdyn,Y,B, according to Method B. 148.3.1General. 148.3.2Local nominal Hertzian contact stress, pH,Y,B . 14Local sliding parameter, SGF,Y .159.1General. 159.2Pressure viscosity coefficient at local contact temperature, αθB,Y . 159.3Dynamic viscosity at local contact temperature, ηθB,Y . 159.3.1General. 159.3.2Kinematic viscosity at local contact temperature, νθB,Y . 169.3.3Density of the lubricant at local contact temperature, ρθB,Y . 16Definition of contact point Y on the path of contact.16Load sharing factor, XY .1911.1 General. 1911.2 Spur gears with unmodified profiles. 1911.3 Spur gears with profile modification. 2011.4 Local buttressing factor, Xbut,Y . 2111.5 Helical gears with εβ 0,8 and unmodified profiles. 2211.6 Helical gears with εβ 0,8 and profile modification. 2311.7 Helical gears with εβ 1,2 and unmodified profiles. 2411.8 Helical gears with εβ 1,2 and profile modification. 2411.9 Helical gears with 0,8 εβ 1,2. 26 ISO 2018 – All rights reserved iii
ISO/TS 6336-22:2018(E) This is a preview of "ISO/TS 6336-22:2018". Click here to purchase the full version from the ANSI store.121314Local contact temperature, θB,Y .26Local flash temperature, θfl,Y .26Bulk temperature, θM.2714.1 General. 2714.2 Mean coefficient of friction, µm . 2814.3 Load losses factor, Hv . 3014.4 Tip relief factor, XCa . 3014.5 Lubricant factor, XS. 32Annex A (informative) Calculation of the permissible specific lubricant film thickness foroils with a micropitting test result according to FVA-Information Sheet 54/7.33Annex B (informative) Guideline for reference values of λGFP.35Bibliography. 38iv ISO 2018 – All rights reserved
ISO/TS 6336-22:2018(E) This is a preview of "ISO/TS 6336-22:2018". Click here to purchase the full version from the ANSI store.ForewordISO (the International Organization for Standardization) is a worldwide federation of national standardsbodies (ISO member bodies). The work of preparing International Standards is normally carried outthrough ISO technical committees. Each member body interested in a subject for which a technicalcommittee has been established has the right to be represented on that committee. Internationalorganizations, governmental and non-governmental, in liaison with ISO, also take part in the work.ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters ofelectrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance aredescribed in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for thedifferent types of ISO documents should be noted. This document was drafted in accordance with theeditorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject ofpatent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details ofany patent rights identified during the development of the document will be in the Introduction and/oron the ISO list of patent declarations received (see www .iso .org/patents).Any trade name used in this document is information given for the convenience of users and does notconstitute an endorsement.For an explanation of the voluntary nature of standards, the meaning of ISO specific terms andexpressions related to conformity assessment, as well as information about ISO's adherence to theWorld Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/iso/foreword .html.This document was prepared by Technical Committee ISO/TC 60, Gears, Subcommittee SC 2, Gearcapacity calculation.Any feedback or questions on this document should be directed to the user’s national standards body. Acomplete listing of these bodies can be found at www .iso .org/members .html.This first edition of ISO/TS 6336-22 cancels and replaces ISO/TR 15144-1:2014.A list of all parts in the ISO 6336 series can be found on the ISO website. See also the Introduction for anoverview. ISO 2018 – All rights reserved v
ISO/TS 6336-22:2018(E) This is a preview of "ISO/TS 6336-22:2018". Click here to purchase the full version from the ANSI store.IntroductionThe ISO 6336 series consists of International Standards, Technical Specifications (TS) and TechnicalReports (TR) under the general title Calculation of load capacity of spur and helical gears (see Table 1).— International Standards contain calculation methods that are based on widely accepted practicesand have been validated.— TS contain calculation methods that are still subject to further development.— TR contain data that is informative, such as example calculations.The procedures specified in ISO 6336-1 to ISO 6336-19 cover fatigue analyses for gear rating. Theprocedures described in ISO 6336-20 to ISO 6336-29 are predominantly related to the tribologicalbehaviour of the lubricated flank surface contact. ISO 6336-30 to ISO 6336-39 include examplecalculations. The ISO 6336 series allows the addition of new parts under appropriate numbers to reflectknowledge gained in the future.Requesting standardized calculations according to ISO 6336 without referring to specific partsrequires the use of only those parts that are currently designated as International Standards (seeTable 1 for listing). When requesting further calculations, the relevant part or parts of ISO 6336 needto be specified. Use of a Technical Specification as acceptance criteria for a specific design needs to beagreed in advance between manufacturer and purchaser.Table 1 — Overview of ISO 6336Calculation of load capacity of spur and helical gearsPart 1: Basic principles, introduction and general influence factorsPart 2: Calculation of surface durability onXXPart 3: Calculation of tooth bending strengthXPart 4: Calculation of tooth flank fracture load capacityPart 5: Strength and quality of materialsPart 6: Calculation of service life under variable loadPart 20: Calculation of scuffing load capacity (also applicable tobevel and hypoid gears) — Flash temperature method(Replaces: ISO/TR 13989-1)Part 21: Calculation of scuffing load capacity (also applicable tobevel and hypoid gears) — Integral temperature method(Replaces: ISO/TR 13989-2)Part 22: Calculation of micropitting load capacity(Replaces: ISO/TR 15144-1)Part 30: Calculation examples for the application of ISO 6336parts 1, 2, 3, 5Part 31: Calculation examples of micropitting load capacity(Replaces: ISO/TR 15144-2)TechnicalReportXXXXXXXXAt the time of publication of this document, some of the parts listed here were under development. Consult the ISO website.This document provides principles for the calculation of the micropitting load capacity of cylindricalinvolute spur and helical gears with external teeth.The basis for the calculation of the micropitting load capacity of a gear set is the model of the minimumoperating specific lubricant film thickness in the contact zone. Many parameters can influence theoccurrence of micropitting. These include surface topography, contact stress level, and lubricantchemistry. Whilst these parameters are known to affect the performance of micropitting for a gear set,vi ISO 2018 – All rights reserved
ISO/TS 6336-22:2018(E) This is a preview of "ISO/TS 6336-22:2018". Click here to purchase the full version from the ANSI store.the subject area remains a topic of research and, as such, the science has not yet developed such thatall aspects of these specific parameters are fully included in the calculation methods. Furthermore,the correct application of tip and root relief (involute modification) has been found to greatly influencemicropitting; the suitable values should therefore be applied. Surface finish is another crucialparameter. At present, Ra is used but other aspects such as Rz or skewness have been observed to havesignificant effects which can be reflected in the finishing process applied.Although the calculation of specific lubricant film thickness (which is also referred to in literature as"film thickness ratio" or "lambda ratio") does not provide a direct method for assessing micropittingload capacity, it can serve as an evaluation criterion when applied as part of a suitable comparativeprocedure based on known gear performance. ISO 2018 – All rights reserved vii
Part 4: Calculation of tooth flank fracture load capacity X Part 5: Strength and quality of materials X Part 6: Calculation of service life under variable load X Part 20: Calculation of scuffing load capacity (also applicable to bevel and hypoid gears
This is known as the capacity calculation process. The capacity calculation process has to be distinguished from the capacity allocation process, which takes place for e.g. day-ahead at the power exchanges. The result of the capacity calculation process is to be used as an input to the capacity allocation process. This document is a
3- hydraulic cylinder own weight (aprox 100 N) has a negligible influence on load capacity (only 2% reduction of load capacity) 4- misalignment due to guide ring wear ( 5 % due to 1000 cycles) has a higher influence on load capacity (reduction of load capacity about 10 %) 6- In real machines,mechanism layout can modify the hydraulic cylinder load
Calculation of load capacity for worm gear according to [10] is done through 5 criteria (table 1). The calculation was performed for various numbers of input speed and gear ratio. For each calculation the maximum output torque 2max was obtained for the required safety. Calculation T results of
Regulation these regions are defined as "capacity calculation regions", meaning "the geographic area in which coordinated capacity calculation is applied". Therefore, a CCR needs to consist of a set of bidding zone borders for which the capacity calculation shall be coordinated by TSOs in accordance with the CACM Regulation.
turning radius speed drawbar gradeability under mast with load center wheelbase load length minimum outside travel lifting lowering pull-max @ 1 mph (1.6 km/h) with load without load with load without load with load without load with load without load 11.8 in 12.6 in 347 in 201 in 16 mp
Floor Joist Spans 35 – 47 Floor Joist Bridging and Bracing Requirements 35 Joist Bridging Detail 35 10 psf Dead Load and 20 psf Live Load 36 – 37 10 psf Dead Load and 30 psf Live Load 38 – 39 10 psf Dead Load and 40 psf Live Load 40 – 41 10 psf Dead Load and 50 psf Live Load 42 – 43 15 psf Dead Load and 125 psf Live Load 44 – 45
Transport Stock Chaser Personnel Carrier Burden Carrier BSC BUV BBC 4-wheel Cushion Walkie Reach StackerWalkie Reach Stacker 5,500lb capacity 4,500lb capacity 6,500lb capacity 6,500lb capacity 10,000lb towing capacity 4,400 - 5,500lb capacity 600lb capacity 1,000lb capacity . MAY 2014
automotive EMC requirements and detailed description of the design recommendations for meeting them. 3. Exploring the MPC5606E Reference board 6-layer design NOTE The main design considerations are described here using the example of the 6-layer Freescale automotive BroadR-Reach board. For best performance, it is critical to closely follow these design guidelines. NOTE Use this document in .
