ImageVerifierCode 换一换
格式:PDF , 页数:3 ,大小:97.97KB ,
资源ID:785820      下载积分:10000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-785820.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(INTERN CEMS BT-20-2009 Four-Square Test For Gear Lubricants《齿轮润滑剂四方试验》.pdf)为本站会员(orderah291)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

INTERN CEMS BT-20-2009 Four-Square Test For Gear Lubricants《齿轮润滑剂四方试验》.pdf

1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 1 of 3 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECI

2、FICATION) NUMBER: CEMS BT-20 TITLE: Four-Square Test For Gear Lubricants CURRENT ISSUE DATE: August 2009 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: October 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specific

3、ation may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior

4、to use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This method covers a test procedure used for screening load carrying properties of combination Hydraulic Transmission fluids. 2.0 APPARATUS 2.1 Materials Engineering

5、approved Four-Square Test Machine. 2.2 Brush Surfindicator Model No. MS 1400 or equivalent. 2.3 An adequate torque control system or device. 3.0 MATERIAL 3.1 15 gallons (57 liters) of test fluid. 3.2 5 gallons (19 liters) of reference fluid “A” (see “Calibration”). 3.3 5 gallons (19 liters) of refer

6、ence fluid “B” (see “Calibration”). 3.4 CP toluidine, toner dark, powder No. RT 6155, mixed to a paste consistency with SAE Grade 20 motor oil. 3.5 Paper filter element International part number 381257R91, one required for each fluid used. 3.6 Transparent mending tape, Scotch Magic Transparent or eq

7、uivalent. 3.7 Bull pinion and brake shaft, International part number 375698R1, one required for each test. 3.8 Bull gear, International part number 375699R1, one required for each test. 3.9 Pinions and gears used in this test will meet the requirements of AGMA Class 7 and will be inspected for compl

8、iance to blueprint specifications prior to testing. Surface finish as measured at three points on the pitch line of a pinion tooth will be 27 microinches (0.7 mm) AA, max, prior to testing. 4.0 CALIBRATION The torque load levels used during the test must be calibrated using laboratory reference flui

9、ds. These reference fluids can be any convenient fluids satisfying the requirements for “A” and “B” listed below. 4.1 Reference fluid “A” will be one which produces a surface finish greater than 50 inches (1.3 m) AA at a stress produced by the first test load of 278 ksi (1.915 GPa) or the second tes

10、t load 295 ksi (2.035 GPa) Hertz contact stress when tested at a temperature of 180 + 5F (82.5 + 3C). 4.2 Reference fluid ”B” must produce a surface finish less than 35 inches (0.9m) AA after completion of all stress levels at test temperature of 230 + 5F (110 + 3C). Copyright Navistar International

11、 Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: CEMS BT-20 TITLE Four-Square test For Gear Lubricants CURRENT ISSUE DATE: August 2009 This document is restricted and may not be sent outside Navistar, Inc

12、. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 2 of 3 4.3 Steps (1) through (11) in the test procedure are required for calibration purposes. Slight changes of torque levels may be

13、permitted to obtain proper calibration. Check calibration periodically to insure that valid data is being obtained. 5.0 PROCEDURE 5.1 Drain the oil from the apparatus, including oil well and heater, after each individual test. 5.2 When changing to a reference fluid or a different test fluid, clean t

14、he reserve oil well, magnetic filter and filter housing and install a new paper filter element. Flush the system by pumping two gallons (7.6 liters) of the new test fluid through the primary oil circulating pump, drain from the bottom of the heater. This insures a clean uncontaminated supply of the

15、new fluid for the next test. 5.3 Install new test gear and pinion. Use spherical roller bearings on the test pinion to allow adjustment necessary to obtain proper alignment. 5.4 Load at 1000 inch pounds (113 Nm) pinion torque. Coat pinion and gear teeth with the paste compound (CP toluidine toner da

16、rk, powder No. RT 6155 mixed with oil). Rotate gears through mesh and check for center tooth contact. If contact pattern is off center, shim outer extremities of front or rear bearing bars to provide proper contact. Coat pinion again and check contact pattern. Continue this procedure until uniform c

17、ontact is obtained. All traces of the paste compound must be removed from the gear teeth prior to addition of the test fluid. 5.5 Install new fluid and maintain level such that 1.5 inches (38 mm) of the bull gear dips into the reserve oil well. Connect the secondary oil system and adjust flow to del

18、iver 5.8 to 6.7 ml/s to the top of the bull gear, 12 teeth prior to engagement. 5.6 Obtain and record the original surface finish of the pinion teeth using a Brush Surfindicator in micro-inches (micrometers) AA. 5.7 Load to a Hertz contact stress of 220 ksi (1.515 GPa) 4854 inch pounds pinion torque

19、 (548.4 Nm). Run 18 000 pinion cycles at 300 rpm for break-in purposes. Break-in procedure is started with oil at ambient temperature. No temperature control is utilized during break-in. Inspect pinion and gear, determine involute surface finish at three points on the addendum of a pinion tooth and

20、record visual appearance and pinion involute surface finish data upon completion of the step. Pitting or tooth breakage terminates a particular test and necessitates retesting. If surface finish is greater than 50 minches (1.3 mm) AA, test may be terminated. 5.8 Increase torque to first test load, a

21、 Hertz contact stress of 278 ksi (1.915 GPa)7746 inch pounds pinion torque (875.2 Nm). Increase oil temperature to 230 + 5F(110 + 3 C). This temperature and the 300 rpm speed will be maintained throughout all steps of the test. The lubricant is circulated through an automatic heat exchange system at

22、 a rate of 5 gpm (335 ml/s) minimum. Run 126 000 pinion cycles. Inspect pinion and gear as in (5.7). 5.9 Increase torque to second test load, a Hertz contact stress of 295 ksi (2.035 GPa) 8720 inch pounds pinion torque (985.2 Nm). Run 126 000 pinion cycles. Inspect pinion and gear as in (5.7). 5.10

23、Increase torque to third test load, a Hertz contact stress of 311 ksi (2.145 GPa) 9695 inch pounds pinion torque (1095.4 Nm). Run 126 000 pinion cycles. Inspect pinion and gear as in (5.7). Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reprodu

24、ction or networking permitted without license from IHS-,-,-NUMBER: CEMS BT-20 TITLE Four-Square test For Gear Lubricants CURRENT ISSUE DATE: August 2009 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Supplie

25、rs are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 3 of 3 5.11 Increase to final test load, a Hertz contact stress of 326 ksi (2.250 GPa) 10 694 inch pounds pinion torque (1208.2 Nm). Run 126 000 pinion cycles. Inspect pinion and gear as in (5.7). 5.12 Prepare a

26、tape replica of a typical pinion tooth or a failed tooth at the end of the test by the following technique. Wipe surface leaving a very light film of oil. Apply a thin coat of fine graphite powder (or soft pencil lead) to the entire surface to be reproduced. Remove excess with a camels hair brush. A

27、pply pressure sensitive transparent tape, adhesive down, to the surface pressing firmly. Rub with finger tip or an eraser to remove air pockets. Peel off the replica and mount on report form or white paper. 5.13 Perform test in triplicate. 6.0 REPORT Report visual appearance of the tooth involute su

28、rface on the gear and pinion and the surface finish as measured at the three points on a pinion tooth involute prior to testing and after each test load. Note any vertical scratching, localized wear, ripping, scoring, abrasive wear, polishing, discoloration or other unusual conditions and include replica. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1