CN105547918B - Determination of the kinematic viscosity of oil at high temperatures - Google Patents

Determination of the kinematic viscosity of oil at high temperatures Download PDF

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CN105547918B
CN105547918B CN201510881276.XA CN201510881276A CN105547918B CN 105547918 B CN105547918 B CN 105547918B CN 201510881276 A CN201510881276 A CN 201510881276A CN 105547918 B CN105547918 B CN 105547918B
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oil
temperature
kinematic viscosity
viscosity
step
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CN105547918A (en
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文波晋
胡天惠
黎育剑
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广西玉柴机器股份有限公司
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Abstract

本发明公开了一种高温下机油运动粘度的测定方法,包括如下步骤:步骤1,将100℃‑130℃的低温区机油分成100℃机油、110℃机油、120℃机油和130℃机油4组;步骤2,利用运动粘度测试仪对其运动粘度进行分别测试,测试值分别为V100、V110、V120和V130;步骤3,计算相邻温度的低温区机油的粘度温度变化率,分别为X1、X2、X3和X4;步骤4,计算粘度温度变化率的差值,分别为△X1=X1‑X2,△X2=X2‑X3;步骤5,根据△X1/2≈X2‑X3的关系式,推算140℃机油的粘度温度变化率X4=X3‑△X2/2;步骤6,计算140℃机油的运动粘度V140=V130‑X4*V130;以及步骤7,根据计算140℃机油的运动粘度的方式依次计算温度相差10℃的机油的运动粘度。 The present invention discloses a method for measuring the kinematic viscosity of the oil at a high-temperature, comprising the following steps: Step 1, the low temperature of the oil into 100 ℃ -130 ℃ 100 ℃ oil, oil 110 deg.] C, 120 deg.] C oil and 130 ℃ oil group 4 ; step 2, for its use of the kinematic viscosity the kinematic viscosity tester, respectively, were tested values ​​V100, V110, V120 and V130; step 3, the temperature change rate viscosity of the oil temperature of the low temperature zone adjacent the calculation, respectively, X1, X2, X3 and X4; step 4, the viscosity is calculated temperature change rate difference, respectively △ X1 = X1-X2 is, △ X2 = X2-X3; step 5, according to the relation △ X1 / 2≈X2-X3, and the viscosity change rate of estimated temperature of 140 deg.] C oil X4 = X3- △ X2 / 2; step 6, is calculated 140 ℃ oil kinematic viscosity V140 = V130-X4 * V130; and a step 7, based on the calculated oil kinematic viscosity 140 ℃ manner sequentially calculates the temperature difference of 10 deg.] C kinematic viscosity of the oil. 该方法快速简便的获得较可靠的数据。 This method is fast and easy to obtain more reliable data.

Description

高温下机油运动粘度的测定方法 Determination of the kinematic viscosity of oil at high temperatures

技术领域 FIELD

[0001] 本发明涉及石油实验领域,特别涉及一种高温下机油运动粘度的测定方法。 [0001] The present invention relates to the field of experimental oil, particularly to a method for measuring the kinematic viscosity of the oil at a high-temperature.

背景技术 Background technique

[0002] 机油的运动粘度反映的是机油的内摩擦力,是表示油品油性和流动性的一项指标(运动粘度的单位为mm2/s)。 [0002] The movement of the oil viscosity reflects the internal friction oil, oily and oil is an indicator of flowability (the unit of kinematic viscosity mm2 / s). 由于机油的运动粘度和使用温度密切相关,所以,一般情况下, 我们把机油的运动粘度表示为在一定温度下的运动粘度。 Since kinematic viscosity and temperature are closely related to oil, so under normal circumstances, we kinematic viscosity of the oil is expressed as the kinematic viscosity at a certain temperature. 我国通行的油品标准运动粘度测试只进行到l〇〇°C,对温度高于100°C (尤其是高于130°C)油品运动粘度,鉴于国内测试仪器的密封性能和高温下油品测试的重现性不好等问题,往往不能得到理想的测试结果。 Of the prevailing standard kinematic viscosity oil to test only l〇〇 ° C, to a temperature above 100 ° C (especially above 130 ° C) oil kinematic viscosity, in view of the sealing performance test equipment and domestic oil temperature poor reproducibility of product testing and other issues, we can not get the desired results.

[0003] 事实上,100°C以上的机油运动粘度不仅仅表征本身的流动特性,还对柴油机的工况性能(柴油机机油温度一般都在l〇〇°C以上)有一定联系,如机油耗参数往往和机油的运动粘度、蒸发损失等参数成正比关系。 [0003] In fact, the oil above 100 ° C kinematic viscosity of not characterize the flow properties itself, but also on the status of the work performance of the diesel engine (diesel oil temperature is generally at least l〇〇 ° C) have some contact, such as oil consumption and motion parameters are often oil viscosity parameter is proportional, relationship evaporation losses. 所以研究l〇〇°C以上的机油运动粘度有着较重要意义。 So more research l〇〇 ° C kinematic viscosity of the oil has a more important significance.

[0004] 现石油行业对于高温下(100°C以上)运动粘度的获取除了直接用粘度测试仪测试夕卜,还包括粘度-温度计算图描点法。 [0004] For obtaining the petroleum industry is now at a high temperature (above 100 ° C) in addition to the direct kinematic viscosity viscosity tester Bu Xi, further comprising a viscosity - temperature calculation point method described in FIG. 它主要是在一定的温度范围内用直线在粘度-温度计算图上把两个温度下的运动粘度连接。 It is mainly viscosity within a certain temperature range by a straight line - the kinematic viscosity at two temperature connected to temperature calculating FIG. 通过内插和外延法得出一定温度下的运动粘度。 Derived by interpolation and a kinematic viscosity at a temperature epitaxy. 这种方法对于选定的两个温度点的运动粘度测试准确性要求很高,而且对于描点作图同样要求很精密。 This approach two points selected temperature kinematic viscosity testing accuracy demanding, but is also required for the plot points plotted very sophisticated. 只要描点出现一些偏差,那么将会严重影响到数据的准确性(事实上是很难做到精确甚至准确的)。 As long as some deviation plot points, it will seriously affect the accuracy of the data (in fact it is very difficult to be precise even accurate). 总而言之,粘度-温度计算图描点法只要测试或描点稍有偏差,就很难获得准确的数据。 In summary, the viscosity - temperature calculation point method described in FIG testing or just a slight deviation plot points, it is difficult to obtain accurate data. 采用现行的仪器测试方法,对高温运动粘度测试仪自身测试数据重现性不好(高温下容易加速油品的蒸发等),而且仪器的密封配件要求高等原因,使得高温运动测试仪造价较高。 The method of using existing test equipment, high temperature kinematic viscosity tester poor reproducibility test data itself (evaporation under high temperature readily accelerated oil, etc.), and the reasons for higher instrument seal assembly requirements, such that movement of the high-temperature high cost tester . 以上方法均不利于高温运动粘度数据的获得。 None of the above advantageous for obtaining a high temperature kinematic viscosity data.

[0005] 公开于该背景技术部分的信息仅仅旨在增加对本发明的总体背景的理解,而不应当被视为承认或以任何形式暗示该信息构成已为本领域一般技术人员所公知的现有技术。 [0005] disclosed in this Background section is only for enhancement of understanding of the information of the general background of the invention and should not be taken as an acknowledgment or any form of suggestion that this information forms known to those of ordinary skill in the known prior technology.

发明内容 SUMMARY

[0006] 本发明的目的在于提供一种高温下机油运动粘度的测定方法,能快速简便的获得较可靠的数据。 [0006] The object of the present invention to provide a method for measuring the kinematic viscosity of the oil at a high-temperature, can quickly and easily obtain more reliable data.

[0007] 为实现上述目的,本发明提供了一种高温下机油运动粘度的测定方法,用来测定100°C以上的机油运动粘度,该测定方法包括如下步骤: [0007] To achieve the above object, the present invention provides a method for measuring the kinematic viscosity of the oil at a high-temperature, used for measuring the oil above 100 ° C kinematic viscosity, the measurement method comprising the steps of:

[0008] 步骤1,将100°c-130°c的低温区机油分成100°C机油、110°C机油、120°C机油和130 °C机油4组; [0008] Step 1, to 100 ° c-130 ° c oil into a low-temperature region of 100 ° C oil, 110 ° C oil, 120 ° C and 130 ° C oil oil 4 groups;

[0009] 步骤2,利用运动粘度测试仪对所述100 °C机油、所述110 °C机油、所述120 °C机油和所述130 °C机油的运动粘度进行分别测试,测试值分别为Vl 00、Vl 10、Vl 20和Vl 30; [0009] Step 2, using the kinematic viscosity tester 100 ° C oil, the oil is 110 ° C, 120 ° C the kinematic viscosity of the oil and the oil is 130 ° C were tested, test values ​​were Vl 00, Vl 10, Vl 20 and Vl 30;

[0010] 步骤3,根据粘度温度变化率=(低温运动粘度-高温运动粘度)/低温运动粘度来计算相邻温度的低温区机油的粘度温度变化率,粘度温度变化率分别为Xl、X2、X3和X4; [0010] Step 3, in accordance with the temperature change rate viscosity = - calculating the viscosity-temperature low-temperature region adjacent to the oil temperature rate of change (kinematic viscosity at low temperature kinematic viscosity) / low temperature kinematic viscosity, the viscosity-temperature change rate were Xl, X2, X3 and X4;

[0011]步骤4,计算相邻温度的低温区机油的粘度温度变化率的差值,该差值分别为ΛΠ = Χ1-Χ2,ΔΧ2 = Χ2-Χ3; [0011] Step 4, the difference between the rate of change of the viscosity-temperature low-temperature region adjacent to the oil temperature is calculated, the difference respectively ΛΠ = Χ1-Χ2 is, ΔΧ2 = Χ2-Χ3;

[0012] 步骤5,根据ΛΧ1/2〜Χ2-Χ3的关系式,推算高温区机油中140°C机油的粘度温度变化率Χ4 = Χ3-ΛΧ2/2; [0012] Step 5 The relationship ΛΧ1 / 2~Χ2-Χ3, the estimated rate of change of the viscosity-temperature oil in the high temperature region of 140 ° C oil Χ4 = Χ3-ΛΧ2 / 2;

[0013] 步骤6,计算高温区机油中140°C机油的运动粘度VHO = Vl30-Χ4*νΐ30;以及 [0013] Step 6, the kinematic viscosity of the oil in the high temperature region is calculated 140 ° C oil VHO = Vl30-Χ4 * νΐ30; and

[0014] 步骤7,根据计算140Γ机油的运动粘度的方式依次计算高温区机油温度相差KTC 的机油的运动粘度。 [0014] Step 7 The embodiment of the kinematic viscosity of oil calculated sequentially calculates 140Γ oil temperature difference between the high temperature region of KTC kinematic viscosity of the oil.

[0015] 与现有技术相比,本发明具有如下有益效果:通过测定有限个高温点研究其变化规律,推算出未知高温点运动粘度,摆脱了通过描点作图容易造成的描点误差带来的数据不准确的问题,分析方法简易,能快速简便的获得较可靠的数据。 [0015] Compared with the prior art, the present invention has the following beneficial effects: by studying its temperature changes of a finite number of measuring points, calculate the kinematic viscosity of the unknown point temperature, an error out of plot points plotted by plot points likely to cause brought the problem of inaccurate data, analysis method is simple, fast and easy to obtain more reliable data.

具体实施方式 Detailed ways

[0016] 下面对本发明的具体实施方式进行详细描述,但应当理解本发明的保护范围并不受具体实施方式的限制。 [0016] The following specific embodiments of the present invention will be described in detail, it should be understood that the scope of the present invention is not limited to the specific embodiments.

[0017] 除非另有其它明确表示,否则在整个说明书和权利要求书中,术语“包括”或其变换如“包含”或“包括有”等等将被理解为包括所陈述的元件或组成部分,而并未排除其它元件或其它组成部分。 [0017] Unless otherwise expressly indicated otherwise, throughout the specification and claims, the terms "including" or a conversion such as "comprises" or "comprising" and the like will be understood to include the recited elements or components of , and does not exclude other elements or other components.

[0018] 根据本发明具体实施方式的一种高温下机油运动粘度的测定方法,用来测定100 °C以上的机油运动粘度,该测定方法包括如下步骤: [0018] The method for measuring the kinematic viscosity of the oil at a high-temperature specific embodiment of the present invention, for measuring the oil above 100 ° C kinematic viscosity, the measurement method comprising the steps of:

[0019] 步骤1,将100°c-130°c的低温区机油分成100°C机油、110°C机油、120°C机油和130 °C机油4组。 [0019] Step 1, to 100 ° c-130 ° c oil into a low-temperature region of 100 ° C oil, 110 ° C oil, 120 ° C and 130 ° C oil oil 4 groups.

[0020] 步骤2,利用运动粘度测试仪对所述100 °C机油、所述110 °C机油、所述120 °C机油和所述130 °C机油的运动粘度进行分别测试,测试值分别为Vl 00、Vl 10、Vl 20和Vl 30。 [0020] Step 2, using the kinematic viscosity tester 100 ° C oil, the oil is 110 ° C, 120 ° C the kinematic viscosity of the oil and the oil is 130 ° C were tested, test values ​​were Vl 00, Vl 10, Vl 20 and Vl 30.

[0021] 步骤3,根据粘度温度变化率=(低温运动粘度-高温运动粘度)/低温运动粘度来计算相邻温度的低温区机油的粘度温度变化率,粘度温度变化率分别为Xl、X2、X3和X4。 [0021] Step 3, in accordance with the temperature change rate viscosity = - calculating the viscosity-temperature low-temperature region adjacent to the oil temperature rate of change (kinematic viscosity at low temperature kinematic viscosity) / low temperature kinematic viscosity, the viscosity-temperature change rate were Xl, X2, X3 and X4.

[0022] 步骤4,计算相邻温度的低温区机油的粘度温度变化率的差值,该差值分别为ΛΠ = Χ1-Χ2,ΔΧ2 = Χ2-Χ3〇 , The temperature difference between the rate of change of viscosity [0022] Step 4 adjacent to the low temperature region of the oil temperature is calculated, the difference respectively ΛΠ = Χ1-Χ2 is, ΔΧ2 = Χ2-Χ3〇

[0023] 步骤5,根据ΛΧ1/2〜Χ2-Χ3的关系式,推算高温区机油中140°C机油的粘度温度变化率Χ4 = Χ3-ΛΧ2/2。 [0023] Step 5 The relationship ΛΧ1 / 2~Χ2-Χ3, the estimated rate of change of the viscosity-temperature oil in the high temperature region of 140 ° C oil Χ4 = Χ3-ΛΧ2 / 2.

[0024] 步骤6,计算高温区机油中140 °C机油的运动粘度VHO = Vl 30-X4*Vl 30。 [0024] Step 6, the oil in the high temperature region is calculated kinematic viscosity of 140 ° C oil VHO = Vl 30-X4 * Vl 30. 以及 as well as

[0025] 步骤7,根据计算140°C机油的运动粘度的方式依次计算高温区机油温度相差KTC 的机油的运动粘度。 [0025] Step 7 The embodiment of the kinematic viscosity of the oil is 140 ° C is calculated sequentially calculated oil temperature difference between the high temperature region of KTC kinematic viscosity oil.

[0026] 以下以某机油不同温度点下运动粘度变化来详细说明本方法: [0026] In the following a change in kinematic viscosity of the oil temperature points of the method will be described in detail:

[0027] 首先,我们使用某牌号新机油进行100 °C、110°C、120 °C、130 °C运动粘度测试,这四个粘度分别记为¥100、¥110、¥120,130,在该步骤中,为准确研究柴油机油高温下运动粘度变化情况,采用精密高温运动粘度测试仪器来测试100 °C、110 °C、120°C、130 °C运动粘度。 [0027] First, we use a new oil grades for 100 ° C, 110 ° C, 120 ° C, 130 ° C kinematic viscosity testing, the viscosity of which four are denoted as ¥ 100, ¥ 110, ¥ 120,130, in in this step, an accurate study of kinematic viscosity change of diesel engine oil at high temperature, the high temperature kinematic viscosity testing using sophisticated equipment to test 100 ° C, 110 ° C, 120 ° C, 130 ° C kinematic viscosity. 见下表: As follows:

[0028] 表I: [0028] Table I:

Figure CN105547918BD00051

~下面把上表1中的数据根据相邻温度点进行不同温度下粘度分组: ' ~ The following data in Table 1 Viscosity at different temperatures grouping adjacent temperature points: '

[0031] 1. 110。 [0031] 1.110. . 、100。 100. .

[0032] 粘度温度变化率Xl= (14.98-12.15)/14.98 = 0.1889 [0032] The viscosity-temperature change rate Xl = (14.98-12.15) /14.98 = 0.1889

[0033] 2. 12(TC、11(TC [0033] 2. 12 (TC, 11 (TC

[0034] 粘度温度变化率X2= (12.15-10.01)/12.15 = 0.1761 [0034] The viscosity-temperature change rate X2 = (12.15-10.01) /12.15 = 0.1761

[0035] 3. 130 Γ、120 Γ [0035] 3. 130 Γ, 120 Γ

[0036] 粘度温度变化率X3= (10.01-8.362)/8.362 = 0.1646 [0036] The viscosity-temperature change rate X3 = (10.01-8.362) /8.362 = 0.1646

[0037] 通过研究温度和运动粘度相应数据,发现在一定范围内,同样的相邻温度点,机油的运动粘度随温度递减呈一定简易规律。 [0037] Temperature and through a respective kinematic viscosity data found within a certain range, the temperature adjacent the same point, the kinematic viscosity of the oil was decreasing with temperature to some simple rule. 具体为粘度温度变化率=(低温运动粘度-高温运动粘度)/低温运动粘度。 Specifically, the temperature change rate = viscosity (kinematic viscosity at low temperature - high temperature kinematic viscosity) / low temperature kinematic viscosity.

[0038] 另外,计算相邻温度为HTC的测试范围内,粘度温度变化速率ΛΧ下降分别约为: [0038] Further, the adjacent calculating a temperature within the test range of HTC, the rate of change of the viscosity-temperature ΛΧ decreased by approximately:

[0039] ΔΧ1=Χ1-Χ2 = 0.1889-0.1761=0.0128 [0039] ΔΧ1 = Χ1-Χ2 = 0.1889-0.1761 = 0.0128

[0040] ΔΧ2=Χ2-Χ3 = 0.1761-0.1646 = 0.0115 [0040] ΔΧ2 = Χ2-Χ3 = 0.1761-0.1646 = 0.0115

[0041] 至此可以发现,该机油运动粘度在该100°C-130°C下粘度温度变化率X是呈递减, 且几乎呈简单倍数关系。 [0041] At this point can be found that the viscosity of the oil kinematic viscosity temperature change rate is a decreasing X at the 100 ° C-130 ° C, and was almost simple multiple relationship. 即ΛΧ1/2〜X2-X3。 I.e. ΛΧ1 / 2~X2-X3.

[0042] 由此可以推算出V140可能的运动粘度: [0042] It can be possible to calculate the kinematic viscosity V140:

[0043] 粘度温度变化率X4 = 0.1646-0.0115/2 = 0.1646-0.0075 = 0.1571 [0043] The viscosity temperature change rate X4 = 0.1646-0.0115 / 2 = 0.1646-0.0075 = 0.1571

[0044] 运动粘度Vl 40 = 8 · 362-0 · 1571*8 · 362 = 7 · 048mm2/s [0044] Kinematic viscosity Vl 40 = 8 · 362-0 · 1571 * 8 · 362 = 7 · 048mm2 / s

[0045] 根据计算140 °C机油的运动粘度的方式,可以推算出150 °C机油、160 °C机油等的运动粘度V150、V160等。 [0045] The embodiment of the kinematic viscosity at 140 ° C is calculated oil, can calculate the oil 150 ° C, 160 ° C kinematic viscosity of oil and other V150, V160 and the like.

[0046] 综上,本实施例的高温下机油运动粘度的测定方法通过测定有限个高温点研究其变化规律,推算出未知高温点运动粘度,摆脱了通过描点作图容易造成的描点误差带来的数据不准确的问题,分析方法简易,能快速简便的获得较可靠的数据。 [0046] In summary, the measurement method of the kinematic viscosity of oil at high temperature according to the present embodiment is determined by a finite number of high temperature which variation point studies, calculate the unknown hot spots kinematic viscosity out of the plot points error by plot points plotted likely to cause brought the problem of inaccurate data, analysis method is simple, fast and easy to obtain more reliable data.

[0047] 需要说明的是,不同机油或样本粘度温度变化速率会不一样。 [0047] Note that different oils or rate of change of the viscosity-temperature sample will be different.

[0048] 前述对本发明的具体示例性实施方案的描述是为了说明和例证的目的。 [0048] The foregoing description of specific exemplary embodiments of the present invention for purposes of illustration and explanation. 这些描述并非想将本发明限定为所公开的精确形式,并且很显然,根据上述教导,可以进行很多改变和变化。 They are not intended to limit the invention to the precise form disclosed, and obviously, of the above teachings, many modifications and variations may be made. 对示例性实施例进行选择和描述的目的在于解释本发明的特定原理及其实际应用,从而使得本领域的技术人员能够实现并利用本发明的各种不同的示例性实施方案以及各种不同的选择和改变。 Exemplary embodiments were chosen and described to explain certain principles of the object of the present invention and its practical application, thereby enabling others skilled in the art to make and utilize various exemplary embodiments of the present invention and various select and change. 本发明的范围意在由权利要求书及其等同形式所限定。 The scope of the present invention is intended by the appended claims and their equivalents as defined.

Claims (1)

1. 一种高温下机油运动粘度的测定方法,用来测定l〇〇°C以上的机油运动粘度,该测定方法包括: 步骤1,将100 °C -130 °C的低温区机油分成100 °C机油、110 °C机油、120 °C机油和130 °C机油4组; 步骤2,利用运动粘度测试仪对所述100°C机油、所述110°C机油、所述120°C机油和所述130°C机油的运动粘度进行分别测试,测试值分别为¥100,110、¥120和¥130,其特征在于, 该测定方法还包括如下步骤: 步骤3,根据粘度温度变化率=(低温运动粘度-高温运动粘度)/低温运动粘度来计算相邻温度的低温区机油的粘度温度变化率,粘度温度变化率分别为Xl、X2、X3和X4; 步骤4,计算相邻温度的低温区机油的粘度温度变化率的差值,该差值分别为ΛΧ1 = Χ1-Χ2,ΔΧ2 = Χ2-Χ3; 步骤5,根据ΛΠ/2〜Χ2-Χ3的关系式,推算高温区机油中140°C机油的粘度温度变化率Χ4 = Χ3-ΔΧ2/2; 步骤6,计算 1. A method of determining the kinematic viscosity of oil at high temperatures, used for measuring the above l〇〇 ° C kinematic viscosity of the oil, the assay method comprising: a step 1, the low temperature oil is 100 ° C -130 ° C into 100 ° C oil, oil 110 ° C, 120 ° C and 130 ° C oil oil 4 groups; step 2, using the kinematic viscosity tester 100 ° C oil, the oil is 110 ° C, and a 120 ° C oil the kinematic viscosity of the oil is 130 ° C were tested, the test values ​​of ¥ 100,110, ¥ 120 ¥ and 130., wherein the method further comprises the step of measuring: step 3 the viscosity of the temperature change rate = ( kinematic viscosity at low temperature - high temperature kinematic viscosity) / low temperature kinematic viscosity to calculate the temperature change rate viscosity low temperature region adjacent to the oil, the viscosity-temperature change rate were Xl, X2, X3, and X4; step 4, the calculation of the adjacent low temperature the difference between the rate of change of the oil viscosity-temperature region, respectively, the difference is ΛΧ1 = Χ1-Χ2, ΔΧ2 = Χ2-Χ3; step 5, according to the relationship ΛΠ / 2~Χ2-Χ3 of estimating the oil temperature region 140 ° the viscosity of the oil temperature change rate C Χ4 = Χ3-ΔΧ2 / 2; step 6, is calculated 温区机油中140 °C机油的运动粘度V140 = V130-X4*V 130;以及步骤7,根据计算140°C机油的运动粘度的方式依次计算高温区机油温度相差10°C的机油的运动粘度。 Moving the oil 140 ° C oil-temperature viscosity V140 = V130-X4 * V 130; and a step 7, according to the embodiment kinematic viscosity calculated 140 ° C oil sequentially calculated oil temperature high temperature zone difference between the 10 ° C oil kinematic viscosity .
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