标准编号：ISO 26422:2011
中文名称：石油和相关产品 含聚合物的润滑油的剪切稳定性测定 圆锥滚子轴承法
英文名称：Petroleum and related products — Determination of shear stability of lubricating oils containing polymers — Method using a tapered roller bearing
发布日期：2011-03
标准范围
This International Standard specifies a method of determining the shear stability of polymer-containinglubricating oils, including pressure fluids, by the four-ball tester as specified in ISO 20623, but using a taperedroller bearing. The test results allow prediction of the in-service permanent viscosity loss.NOTE Other International Standards exist which evaluate viscosity loss of polymer-containing oils. The methodspecified in this International Standard subjects fluids to a higher shear rate than, for example, the diesel injector nozzleshear test in ISO 20844. It is particularly appropriate for lubricants being used in high shear applications, such ascomponents with gears and roller bearings. In such applications, the shear rate in the ISO 20844 test method can be toolow to generate a realistic permanent shear of the fluid.
立即下载标准文件