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ISO 13939-2019 箔轴承--箔轴颈轴承的性能试验--静载荷能力、摩擦系数和寿命试验 Foil bearings — Performance testing of foil journal bearings — Testing of static load capacity, friction coefficient and lifetime
This document describes a method for comparing the performance test results of foil journal bearings, <br />which are lubricated by air (gas) and supported by the gas-dynamic force generated via the rotations <br />of the rotating shaft. The test procedure proposed in this document aims to predict and evaluate the <br />static load capacity, friction coefficient and lifetime of foil journal bearings and compare the results of <br />these parameters under different test conditions, i.e. at varying dimensions of foil bearing, rotational <br />speed of a shaft, pressure and humidity of the surroundings. The magnitude of the static load capacity <br />can change according to the test setting, as the test conditions can be changed.<br />The test method described in this document has the following application coverage.<br />a) The criterion for evaluating the static load capacity is the steady-state condition; i.e. the method <br />is applicable under limited operating conditions with uniform magnitude, load direction and <br />rotational speed.<br />b) The evaluation procedure can be applied only if the foil journal bearing is under a uniform rotating <br />inertia at an arbitrary rotational speed.<br />c) The dynamic load with time-variant magnitude and direction is not considered....
2023-10-04 14:36:02浏览：29
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GB/T 33205-2016 轻型输送带 摩擦系数的测定 Light conveyor belts--Determination of the coefficient of friction
本标准规定了测定ISO 21183-1所述轻型输送带的动态和静态摩擦系数的试验方法。...
2023-07-03 02:12:01浏览：42
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JT/T 763-2017 摆式摩擦系数测定仪
本标准规定了摆式摩擦系数测定仪结构型式、技术要求、试验方法、检验规则，以及标志、包装、运输和储存要求。
本标准适用于摆式摩擦系数测定仪的生产、检验和使用。
替代JT/T 763-2009...2023-03-04 19:56:02浏览：20
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GB/T 10006-2021塑料 薄膜和薄片 摩擦系数的测定Plastics. Film and sheetin. Determination of the coefficients of friction
本标准规定了一种测定塑料薄膜和薄片与其自身或其他物质开始摩擦及滑动过程中摩擦系数的方法。本标准适用于最大厚度为0.5 mm的非粘性塑料薄膜和薄片(以下简称“薄膜”)。本标准主要用于质量控制。一般来说，由于涉及静电电荷、气垫、局部温度升高以及磨损等因素，本标准不给出在包装或加工机械上加工性能的综合评估。静摩擦力通常会随表面接触时间延长而升高。为得到可比较的结果，本标准规定了这一接触时间。滑动性有时通过向塑料材料内加人添加剂而产生。添加剂与薄膜基材的相容性程度不同，可能迁移到薄膜表面从而改变其滑动性。由于这些因素依赖于时间，因此，此类薄膜的测试应与薄膜存放的时间相关。...
2022-10-24 02:09:01浏览：44
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HG/T 20576-1998粉粒体静壁面摩擦系数的测定Measurment of Friction coefficients of power/particle and static wall
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2022-06-10 07:53:18浏览：59
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SH/T 0762-2005润滑油摩擦系数测定法(四球法)The test method for determination of the coefficient of friction of lubricants using the four-ball wear test machine
本标准规定了使用四球磨损试验机测定润滑油摩擦系数的试验方法。...
2022-06-09 22:28:52浏览：38
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三层共挤聚烯烃热收缩薄膜的时延效应
考察了储存时间对聚烯烃热收缩薄膜(POSF)综合性能的影响,研究发现,随储存时间增加,(1)POSF的热收缩速率(vSR)递减,但热收缩率(SR)基本不变;(2)摩擦系数(COF)历经迅速降低后缓慢增加,直至稳定.文中首次定义了热收缩速率....
2020-08-11 22:29:03浏览：58
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