ASTM D5579-2013 Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test《评估循环耐久性试验中手动传动润滑剂热稳定性的标准试验方法》.pdf
《ASTM D5579-2013 Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test《评估循环耐久性试验中手动传动润滑剂热稳定性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D5579-2013 Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test《评估循环耐久性试验中手动传动润滑剂热稳定性的标准试验方法》.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D5579 13Standard Test Method forEvaluating the Thermal Stability of Manual TransmissionLubricants in a Cyclic Durability Test1This standard is issued under the fixed designation D5579; the number immediately following the designation indicates the year oforiginal adoption or, in the cas
2、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the thermal stability of fluids foruse in heavy duty manual transm
3、issions when operated at hightemperatures.1.2 The lubricant performance is measured by the numberof shifting cycles that can be performed without failure ofsynchronization when the transmission is operated while con-tinuously cycling between high and low range.1.3 Correlation of test results with tr
4、uck transmission ser-vice has not been established. However, the procedure has beenshown to appropriately separate two transmission lubricants,which have shown satisfactory and unsatisfactory field perfor-mance in the trucks of one manufacturer.1.4 Changes in this test method may be necessary due to
5、refinements in the procedure, obsolescence of parts, orreagents, and so forth. These changes will be incorporated byInformation Letters issued by the ASTM Test MonitoringCenter (TMC).2The test method will be revised to show thecontent of all the letters, as issued.1.5 The values stated in inch-pound
6、 units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5.1 ExceptionWhen materials, products, or equipmentare available only in inch-pound units, SI units are omitted.1.6 Th
7、is standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.7 This test method
8、is arranged as follows:SectionScope 1Referenced Documents 2Terminology 3Summary of Test Method 4Significance and Use 5Apparatus 6Test Transmission 6.2Transmission Mounts 6.3Oil-Circulating System 6.4Oil Return Hole 6.5Air Pressure Controls 6.6Drive System 6.7Instrumentation 6.8Thermocouple Placement
9、 6.9Reagents and Materials 7Safety 8Preparation of Apparatus 9Cleaning of Parts 9.1Assembly 9.2Calibration 10Transmission and Test Stand Calibration 10.1Reference Oils 10.2Reference Oil Test Frequency 10.3Instrumentation Calibration 10.4Shift Time Calibration 10.5Operating Procedure 11System Flush a
10、nd Charge 11.1Test Operation 11.2Shut-Down Procedure 11.3Transmission Disassembly 11.4Determination of Test Results 12Failure Criteria 12.1Shifter Fork Wear 12.2Test Validity Determination 12.3Report 13Precision and Bias 14Keywords 15Test Validity Calculations and Limits Annex A1HTCT Test Report For
11、ms and Data Dictionary Annex A2Manual Transmission Cyclic Durability Test PartsInspection and Wear MeasurementsAnnex A32. Referenced Documents2.1 ASTM Standards:3D235 Specification for Mineral Spirits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D7422 Test Method for Evaluation of Diesel Eng
12、ine Oils in1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility ofSubcommittee D02.B0.03 on Automotive Gear Lubricants or when shiftingfrom low range to high range, for the countershaft speed todecrease
13、from (1700 to 500) r/min.3.2.6 synchronizer, na pack of friction and reaction platesused to match the speeds of the low- and high-range gears priorto engagement.3.2.7 unsynchronized shift, na shift in which the speed ofthe mating gears is not matched to the speed of the transmis-sion output shaft by
14、 the synchronizer.4. Summary of Test Method4.1 Prior to each test run, the transmission is disassembledand all parts, including the case and the oil-circulating andheating systems, are thoroughly cleaned. The transmission isrebuilt with a new synchronizer assembly, including measuredshifter fork, fr
15、iction, and reaction disks. All other worn ordefective parts are replaced.4.2 The rebuilt transmission is installed on a test stand.4.3 The transmission and oil system are flushed with the testoil in accordance with the flush procedure.4.4 The flush oil is drained, and the test oil is measured andch
16、arged to the transmission.4.5 The transmission is started and operated in low rangeuntil the oil temperature reaches the test operating range.4.6 The transmission is automatically cycled between lowand high range until two unsynchronized shifts occur or thedesired length of test is reached without f
17、ailure. The timerequired to shift from high range to low range is recorded eachhour.4.7 At the conclusion of the test, the test parts are removedand visually inspected. The shifter fork and friction plates aremeasured again to determine wear.5. Significance and Use5.1 This test method is used to eva
18、luate automotive manualtransmission fluids for thermal instability, which results indeterioration of synchronizer performance.5.2 This test method may also be utilized in other specifi-cations and classifications of transmission and gear lubricantssuch as the following:5.2.1 (final API designation o
19、f PG-1),5.2.2 Military Specification MIL-L-2105,5.2.3 SAE Information Report J308 Axle and ManualTransmission Lubricants, and5.2.4 Mack Truck GO-H Gear Lubricant Specification.6. Apparatus6.1 Table 1 is a list of the make and model of recommendedinstruments and equipment.6.2 Test TransmissionThe tes
20、t transmission is a MACKT2180, configuration 11KBA51431 (see Fig. 1). Some parts inthe transmission are to be removed and some are to be addedbefore testing, as listed in Table 2. The main box shift railcover can be replaced with an aluminum plate to facilitatetransmission cleaning at end of test.6.
21、3 Transmission MountsThe transmission is mounted asshown in Fig. 2.6.4 Oil-Circulating SystemThe system heats the oil to thespecified operating temperature of 250 6 5F (121 C 62.7 C) and maintains this temperature throughout the durationof the test. The power density of the heater is not high enough
22、to cause degradation of the oil (22 to 25 W/in.2(3.4 W/cm2to3.9 W/cm2). The oil flow rate is between 6 and 10 gal/min(23 L/min to 38 L/min). A layout of the oil-circulation systemis shown in Fig. 3. A detailed drawing of the recommended oilheating chamber is shown in Fig. 4. The total oil capacity o
23、f thetest system is 5.25 gal (19.87 L) with the oil level in thetransmission at the lower edge of the fill hole. If the systemcapacity is too small, increase by lengthening oil hoses. Whenthe system capacity is too great, decrease by shortening hoses,if it is practical to do so; otherwise, install a
24、n inert (stainlesssteel) block in the transmission main box sump to raise the oillevel. Route the oil lines so that they will empty completelywhen draining the system.4Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001.5Available from Standardization
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD55792013STANDARDTESTMETHODFOREVALUATINGTHETHERMALSTABILITYOFMANUALTRANSMISSIONLUBRICANTSINACYCLICDURABILITYTEST
链接地址:http://www.mydoc123.com/p-520158.html