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ICS 75.140 CCS E 40 中华人民共和国石油化工行业标准 NB/SH/T 6088—2024 航空涡轮发动机油结焦倾向性测定 单相流体法 Evaluation of coking propensity of avia tion turbine engine lubricants using— The single phase flow technique 2024-12-25发布 2025-06-25实施 NB/SH/T 6088—2024 I 目 次 前言 ······························································································································I I 1 范 围 ························································································································· 1 2 规范性引用文件 ·········································································································· 1 3 术语和定义 ················································································································ 1 4 方法概要 ··················································································································· 1 5 仪 器 ························································································································· 1 6 试剂与材料 ················································································································ 2 7 系统校准 ··················································································································· 2 8 仪器准备 ··················································································································· 3 9 步 骤 ························································································································· 4 10 报 告 ························································································································ 5 11 精 度 ························································································································ 5 11.1 重复性( r)········································································································ 5 11.2 再现性( R)········································································································ 5 附录 A(规范性) 影响方法精密度的因素 ··········································································· 6 附件 B(规范性) 过滤脱落结焦物的方法 ··········································································· 8 NB/SH/T 6088—2024 II 前 言 本文件按照 GB/T 1.1 —2020《标准化工作导则 第1部分:标准化文件的结构和起草规则》的规定 起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。 本文件由中国石油化工集团有限公司提出。 本文件由全国石油产品和润滑剂标准化技术委员会合成油脂分技术委员会( SAC/TC280/SC5 )归口。 本文件起草单位:中国石化润滑油有限公司合成油脂分公司、民用航空总局第二研究所和中石化石 油化工科学研究院有限公司。 本文件主要起草人:张伟、刘建刚、刘辉、赵玉贞、裴洋、曾萍、李志涛、樊韵宏、马宏、景一川。 本文件于 2024年首次发布。 NB/SH/T 6088—2024 1 航空涡轮发动机油结焦倾向性测定 单相流体法 1 范围 本文件规定了单相流体状态下的航空涡轮发动机油在燃气涡轮发动机特定部位(如轴承腔进油管) 结焦倾向性的测定方法。 本文件适用于测定结焦量在 0.01mg至5.00mg范围内的航空涡轮发动机油结焦倾向性。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中,注日期的引用文件, 仅该日期对应的版本适用于本文件;不注日期的引用文件,其最新版本(包括所有的修改单)适用于本 文件。 GB/T 4756 石油液体手工取样法 FT2(F450) 操作和维护手册 3 术语和定义 本文件没有需要界定的术语和定义。 4 方法概要 将100mL试验油品加入试验仪器的储油罐,用空气对试验系统加压至 1380kPa±140kPa(200psi ±20psi),然后将预热的试验油品,通过循环泵以一定的流速循环流经由电阻加热的(通常 375℃)管 壳式试验组件,并在试验系统中循环规定的时间(通常为 20h或40h)。试验结束后,确定试验管上产 生的结焦物质量。 5 仪器 5.1 Falex高温结焦试验仪( FT2):SAE型。 5.2 烘箱:可控温度 100℃± 5℃。 5.3 干燥器:本试验专用,装有合适的干燥剂。为减少室温波动对试验精度的影响,建议在温度受控 的环境中使用干燥器。 5.4 天平:感量 0.01mg。为减少室温波动对试验精度的影响,建议在温度受控的环境中使用天平。 5.5 量筒: 100mL,最小分度值为 1mL;250mL,最小分度值为 2mL。 5.6 试管:直径约 15mm,长度约 200mm,确保能全部浸泡试验管。 5.7 烧杯: 200mL。 NB/SH/T 6088—2024 2 6 试剂与材料 6.1 试验管: 316不锈钢,几何尺寸见图 1。 表面粗糙度 Ra=0.18μm~0.23μm 图 1 试验管示意图和尺寸(单位: mm) 6.2 石油醚:分析纯,馏程 60℃~ 90℃或 90℃~ 120℃均可,可用庚烷替代。 6.3 丙酮:分析纯。 6.4 丙二醇:分析纯。 6.5 甲苯:分析纯。 6.6 混合溶剂:丙酮、丙二醇、甲苯体积比为 1∶1∶1。 6.7 铅块:纯度不小于 99%。 6.8 锡块:纯度不小于 99%。 6.9 滤膜:特氟龙,孔径为 5µm(建议 Millipore 公司,产品代码为 LSWP04700 )(见附录 B)。 6.10 压缩空气源:清洁、干燥、无油,能够将储油罐加压至 1380kPa±140kPa(200psi±20psi)。 7 系统校准 7.1 校准热电偶 7.1.1 应按照试验仪器操作和维护手册中 规定的方法校准热电偶。如 果手册规定使用锡块共晶温度 (232℃)进行校准,还应使用共晶温度为 327.5℃的铅块进行评估。为使热电偶测量温度与铅块共晶温 度一致,必须按照手册校准步骤补偿差值。如果校准委托服务的校准结果与上述方法校准结果相当,允 许使用校准委托服务代替。 如有争议, 把锡块和铅块共晶温度法作为仲裁方法, 每6个月至少校准一次。 除定期对试验管热电偶进行校准外,需要验证系统状态时也应进行热电偶校准。为验证系

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