CN113030444A - Method for measuring compatibility of lubricating oil - Google Patents
Method for measuring compatibility of lubricating oil Download PDFInfo
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- CN113030444A CN113030444A CN202110323415.2A CN202110323415A CN113030444A CN 113030444 A CN113030444 A CN 113030444A CN 202110323415 A CN202110323415 A CN 202110323415A CN 113030444 A CN113030444 A CN 113030444A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 18
- 239000003921 oil Substances 0.000 claims abstract description 103
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000008859 change Effects 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims description 29
- 238000001914 filtration Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 11
- 239000012153 distilled water Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000005457 optimization Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 46
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 239000002199 base oil Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2888—Lubricating oil characteristics, e.g. deterioration
Abstract
The invention discloses a method for measuring the compatibility of lubricating oil, which relates to the technical field of lubricating oil and comprises the following test steps: a1) the two oil products are fully shaken to ensure the uniformity of the oil products; a2) fully and uniformly mixing two oil products according to different proportions, heating the two oil products in a drying oven at 90 ℃ for 72 hours according to a dry method and a wet method, taking out an oil sample, observing appearance change of the mixed oil products, and carrying out a filterability test, a3) judging whether the two oil products are compatible, the method can rapidly judge whether the two oil products are compatible within a short time by using low test cost, and guides an enterprise to judge whether the two oil products can be safely mixed in the actual use process of the oil products, thereby helping the enterprise realize the purpose of oil product updating or mixing due to the reasons of cost control, technology updating, purchase optimization and the like. The performance of the oil product is reduced due to the mixed use of two incompatible oil products, so that the serious accidents of equipment lubrication failure, equipment damage, unexpected shutdown and the like are caused.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to a method for measuring the compatibility of lubricating oil.
Background
Due to the reasons of enterprise cost control, technology updating, purchasing optimization and the like, the mixed use and substitution demands of lubricating oil of different brands generally exist in the industry. The properties of the base oil and the additive of different brands of lubricating oil are different, so that incompatible problems such as poor compatibility of the base oil and the additive of the lubricating oil, invalidation of physical or chemical reaction between the additives and the like can be caused after the different lubricating oils are mixed.
In order to prevent adverse consequences caused by oil blending, it is necessary to test and verify the blending of lubricating oil, however, if a comprehensive oil blending performance test is carried out, time and money are wasted, and the operation is difficult.
1. Oil compatibility refers to the ability of two or more oils to resist physical and chemical reactions or irregular performance changes after mixing.
2. The lubricating oil consists of base oil and additive. Base oils of the same class are miscible and do not undergo rejection reactions.
3. After mixing the two oils, the additive may undergo physical rejection (e.g., solubility changes causing precipitation of the additive) or chemical reactions (chemical or metathesis), which may be accelerated under high temperature and humidity conditions.
4. In many cases, the equivalent reaction products are the most numerous, and in individual cases, rejection occurs when the two components differ significantly.
5. The rejection can affect the appearance of the mixed oil such that it is no longer clear, uniform, transparent, or produces precipitates or larger sized compounds, resulting in increased microfiltration membrane filtration times.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for measuring the compatibility of lubricating oil, which solves the problem that the existing comprehensive mixed oil performance test needs to carry out multiple and expensive physicochemical index tests.
(II) technical scheme
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a lubricating oil compatibility assay comprising the steps of:
a1) fully shaking the two oil products to ensure the uniformity of the oil products, namely weighing two parts of mixed oil products in equal amount in four beakers respectively, reserving one group of the mixed oil products, respectively marking as A dry and B dry, adding 0.1% of distilled water into the other group, then putting the mixed oil products on a stirrer to stir the oil products to be uniform, and respectively marking as A wet and B wet.
a2) The two oils were mixed in a beaker at a ratio of 1:1, 1:9 and 9:1 and mixed by stirring with a stirrer until homogeneous.
a3) The three samples mixed were each divided into two, one of which was designated as 1:1 dry, 1:9 dry and 9:1 dry, and the other was added with 0.1% distilled water, respectively, and mixed by stirring with a stirrer until uniform, and then designated as 1:1 wet, 1:9 wet and 9:1 wet, respectively.
a4) The color and appearance of the ten samples were recorded.
a5) The ten samples were placed in an oven at 90 ℃. + -. 1 ℃ and heated continuously for 72 h.
a6) After the heating time was over, the sample was removed from the oven, and ten oil products were observed for apparent change and the color and appearance of the sample were recorded.
a7) And if the oil products are clear and transparent and have no obvious appearance change, continuing to perform a filterability test according to the next step, and if any one of the ten oil products has appearance changes such as turbidity, precipitation or floccule precipitation, sample layering and the like, finishing detection according to incompatibility of the two oil products.
a8) Filterability test
a8.1) carefully clamping a filter membrane with the aperture of 1.2um by using tweezers, placing the filter membrane on a sieve plate of the filtering device, opening a vacuum pump to ensure that the filter membrane is firmly adsorbed on the sieve plate, then placing the funnel on a funnel seat, and clamping the funnel by using a metal elastic clamp. The vacuum pump was turned off.
a8.2) 100mL of sample cooled to room temperature was taken, poured into the funnel, the vacuum pump was turned on, the vacuum was adjusted to 47.9kPa (360mmHg), and simultaneously a stopwatch was started to record the time to filter out 100mL of sample to. + -. 1 s.
a9) And (3) judging compatibility: when the filtration time of the six dry and wet mixed oil samples is not obviously increased relative to the four dry and wet unmixed oil samples, and the filter is not obviously blocked, the two oil products are considered to be compatible, and the filtration time of at least one oil sample in the six wet and dry mixed oil samples is obviously increased relative to the four dry and wet unmixed oil samples, or the filter is obviously blocked, the two oil products are considered to be incompatible, and the result is reported that the two oil products are compatible or incompatible.
Preferably, the vacuum system has a vacuum degree not less than 80kPa and is adjustable.
Preferably, the heating constant temperature of the oven is 90 ℃ +/-1 ℃.
Preferably, the stopwatch is accurate to ± 0.1 s.
Preferably, the stirrer is a magnetic stirrer.
Preferably, the diameter of the filter membrane is 47mm, the pore diameter of the filter membrane is 1.2um, the material should not react with the sample to be detected, and a mixed cellulose ester membrane or a glass fiber membrane is recommended.
(III) advantageous effects
The invention has the beneficial effects that:
the method comprises the steps of fully and uniformly mixing two oil products according to different proportions, heating the oil products in a drying oven at 90 ℃ for 72 hours according to a dry method and a wet method, taking out an oil sample, observing appearance change of the mixed oil products, filtering the oil products by using a filter membrane with the aperture of 1.2um under the negative pressure of 47.9kPa (360mmHg), evaluating the compatibility of the two oil products through the appearance change and the filtering time of a sample before and after mixing, judging that the two oil products are incompatible when any one of the appearance change or the filtering test fails, further judging whether the two oil products can be mixed within a shorter time, giving constructive opinions on equipment maintenance, technology updating and purchasing optimization, filling the blank that no method for detecting the compatibility of the lubricating oil is judged in China, rapidly and accurately guiding equipment maintenance and maintenance of an equipment operation unit, further reducing the enterprise cost under the condition of ensuring normal equipment maintenance, the problem of safety and reliability that industrial enterprises need to adopt lubricating oil products for mixed use due to the reasons of cost control, technical updating, purchasing optimization and the like is solved, and powerful help and guidance are further provided for equipment lubrication management of the enterprises.
Drawings
FIG. 1 is a schematic view of the process structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a technical solution: a lubricating oil compatibility assay comprising the steps of:
a1) fully shaking the two oil products to ensure the uniformity of the oil products, namely weighing two parts of mixed oil products in equal amount in four beakers respectively, reserving one group of the mixed oil products, respectively marking as A dry and B dry, adding 0.1% of distilled water into the other group, then putting the mixed oil products on a stirrer to stir the oil products to be uniform, and respectively marking as A wet and B wet.
a2) The two oils were mixed in a beaker at a ratio of 1:1, 1:9 and 9:1 and mixed by stirring with a stirrer until homogeneous.
a3) The three samples mixed were each divided into two, one of which was designated as 1:1 dry, 1:9 dry and 9:1 dry, and the other was added with 0.1% distilled water, respectively, and mixed by stirring with a stirrer until uniform, and then designated as 1:1 wet, 1:9 wet and 9:1 wet, respectively.
a4) The color and appearance of the ten samples were recorded.
a5) The ten samples were placed in an oven at 90 ℃. + -. 1 ℃ and heated continuously for 72 h.
a6) After the heating time was over, the sample was removed from the oven, and ten oil products were observed for apparent change and the color and appearance of the sample were recorded.
a7) And if the oil products are clear and transparent and have no obvious appearance change, continuing to perform a filterability test according to the next step, and if any one of the ten oil products has appearance changes such as turbidity, precipitation or floccule precipitation, sample layering and the like, finishing detection according to incompatibility of the two oil products.
a8) Filterability test
a8.1) carefully clamping a filter membrane with the aperture of 1.2um by using tweezers, placing the filter membrane on a sieve plate of the filtering device, opening a vacuum pump to ensure that the filter membrane is firmly adsorbed on the sieve plate, then placing the funnel on a funnel seat, and clamping the funnel by using a metal elastic clamp. The vacuum pump was turned off.
a8.2) 100mL of sample cooled to room temperature was taken, poured into the funnel, the vacuum pump was turned on, the vacuum was adjusted to 47.9kPa (360mmHg), and simultaneously a stopwatch was started to record the time to filter out 100mL of sample to. + -. 1 s.
a9) And (3) judging compatibility: when the filtration time of the six dry and wet mixed oil samples is not obviously increased relative to the four dry and wet unmixed oil samples, and the filter is not obviously blocked, the two oil products are considered to be compatible, and the filtration time of at least one oil sample in the six wet and dry mixed oil samples is obviously increased relative to the four dry and wet unmixed oil samples, or the filter is obviously blocked, the two oil products are considered to be incompatible, and the result is reported that the two oil products are compatible or incompatible.
The vacuum degree of the vacuum pump is not less than 80kPa, the vacuum degree is adjustable, the heating constant temperature of the oven is 90 +/-1 ℃, the timing of a stopwatch is accurate to +/-0.1 s, the stirrer is a magnetic stirrer, the diameter of the filter membrane is 47mm, and the aperture of the filter membrane is 1.2 um;
the method comprises the following operation steps:
preparing a vacuum pump, wherein the vacuum degree is not less than 80kPa and adjustable, the heating constant temperature of an oven is 90 +/-1 ℃, the timing of a stopwatch is accurate to +/-0.1 s, a stirrer is a magnetic stirrer, the diameter of a filter membrane is 47mm, the material of the filter membrane is 1.2um, the material of the filter membrane does not react with a sample to be measured, a mixed cellulose ester membrane or a glass fiber membrane is recommended to be used, then a1) is carried out to fully shake two oil products to ensure the uniformity of the oil products, namely, two mixed oil products are respectively weighed in four beakers in equal quantity, one group is reserved and respectively marked as A dry and B dry, then 0.1 percent distilled water is added into the other group, then the other group is put into the stirrer to stir the oil products to be uniform, then respectively marked as A wet and B wet, a2) the two oil products are mixed in the beakers according to the proportion of 1:1, 1:9 and 9:1, and are stirred and mixed to be uniform by the stirrer, a3) dividing the three mixed samples into two parts, respectively marking the three parts as 1:1 dry, 1:9 dry and 9:1 dry, respectively adding 0.1% of distilled water into the other part, stirring and mixing the three parts by a stirrer until the three parts are uniform, then respectively marking the three parts as 1:1 wet, 1:9 wet and 9:1 wet, a4) recording the colors and the appearances of the ten samples, a5) placing the ten samples in a baking oven at 90 +/-1 ℃ for continuous heating for 72h, a6) after the heating time is over, taking the samples out of the baking oven, observing whether the appearances of the ten oil products are obviously changed or not and recording the colors and the appearance phenomena of the samples, a7) if the oil products are clear and have no obvious appearance change, continuing to carry out a filterability test according to the next step, if any one of the ten oil products has flocculent appearance, precipitates or precipitates are separated out, the samples are layered and the like, and d, finishing detection according to incompatibility of the two oil products, a8) carrying out a filterability test, a8.1) carefully clamping a filter membrane with the aperture of 1.2um by using tweezers, placing the filter membrane on a sieve plate of the filtering device, opening a vacuum pump to firmly adsorb the filter membrane on the sieve plate, then placing the funnel on a funnel seat, and clamping the funnel by using a metal elastic clamp. Turning off the vacuum pump, a8.2) measuring 100mL of the sample cooled to room temperature, pouring into the funnel, turning on the vacuum pump, adjusting the vacuum to 47.9kPa (360mmHg), and simultaneously turning on a stopwatch to record the time for filtering out 100mL of the sample to ± 1s, a9) compatibility determination: when the filtering time of the dry and wet six mixed oil samples is not obviously increased relative to the four unmixed dry and wet original samples, and the filter is not obviously blocked, the two oil products are considered to be compatible, the filtering time of at least one oil sample in the six mixed oil samples is obviously increased relative to the four unmixed dry and wet original samples, or the filter is obviously blocked, the two oil products are considered to be incompatible, and the result report indicates that the two oil products are compatible or incompatible, so that the method provides powerful help and guidance for the management of enterprise equipment lubrication, and further ensures the functional practicability of the method.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A lubricating oil compatibility assay comprising the steps of:
a1) fully shaking the two oil products to ensure the uniformity of the oil products, respectively weighing two parts of mixed oil products in equal amount in four beakers, reserving one group of the mixed oil products, respectively marking as A dry and B dry, adding 0.1% of distilled water into the other group, then putting the mixed oil products on a stirrer to stir the oil products until the mixed oil products are uniform, and respectively marking as A wet and B wet;
a2) mixing two oil products in a beaker according to the proportion of 1:1, 1:9 and 9:1, and stirring and mixing the two oil products by a stirrer until the two oil products are uniform;
a3) dividing each of the three mixed samples into two parts, respectively marking as 1:1 dry, 1:9 dry and 9:1 dry, respectively adding 0.1% of distilled water into the other part, stirring and mixing by a stirrer until the mixture is uniform, and then respectively marking as 1:1 wet, 1:9 wet and 9:1 wet;
a4) recording the color and appearance of the ten samples;
a5) continuously heating the ten samples in an oven at 90 +/-1 ℃ for 72 hours;
a6) after the heating time is over, taking the sample out of the oven, observing whether the appearance of ten oil products has obvious change and recording the color and appearance phenomena of the sample;
a7) if the oil products are clear and transparent and the appearances do not change obviously, continuing to perform a filterability test according to the step a8, and if any one of the ten oil products has appearance changes such as turbidity, precipitation or floccule precipitation, sample layering and the like, determining that the two oil products are incompatible and ending the detection;
a8) filterability test
a8.1) carefully clamping a filter membrane with the aperture of 1.2um by using tweezers, placing the filter membrane on a sieve plate of a filtering device, starting a vacuum pump to ensure that the filter membrane is firmly adsorbed on the sieve plate, then placing a funnel on a funnel seat, clamping the funnel by using a metal elastic clamp, and closing the vacuum pump;
a8.2) measuring 100mL of sample cooled to room temperature, injecting the sample into a funnel, turning on a vacuum pump, adjusting the vacuum degree to 47.9kPa (360mmHg), simultaneously starting a stopwatch for timing, and recording the time for filtering out the 100mL of sample to be accurate to +/-1 s;
a9) and (3) judging compatibility: when the filtration time of the six dry and wet mixed oil samples is not obviously increased relative to the four dry and wet unmixed oil samples, and the filter is not obviously blocked, the two oil products are considered to be compatible, and the filtration time of at least one oil sample in the six wet and dry mixed oil samples is obviously increased relative to the four dry and wet unmixed oil samples, or the filter is obviously blocked, the two oil products are considered to be incompatible, and the result is reported that the two oil products are compatible or incompatible.
2. The method of claim 1, wherein: the vacuum system has the vacuum degree not less than 80kPa and the vacuum degree is adjustable.
3. The method of claim 1, wherein: the heating constant temperature of the oven is 90 +/-1 ℃.
4. The method of claim 1, wherein: the timing of the stopwatch is accurate to +/-0.1 s.
5. The method of claim 1, wherein: the stirrer is a magnetic stirrer.
6. The method of claim 1, wherein: the diameter of the filter membrane is 47mm, the aperture of the filter membrane is 1.2um, the filter membrane should not react with the tested sample in material, and a mixed cellulose ester membrane or a glass fiber membrane is recommended.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110323415.2A CN113030444A (en) | 2021-03-25 | 2021-03-25 | Method for measuring compatibility of lubricating oil |
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| CN202110323415.2A CN113030444A (en) | 2021-03-25 | 2021-03-25 | Method for measuring compatibility of lubricating oil |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849238A (en) * | 2013-06-07 | 2016-08-10 | 巴斯夫欧洲公司 | Use of nitrogen compounds quaternised with alkylene oxide and hydrocarbyl-substituted polycarboxylic acid as additives in fuels and lubricants |
| CN108802343A (en) * | 2018-06-20 | 2018-11-13 | 冰轮环境技术股份有限公司 | A kind of high temperature heat pump lubricating oil and working medium compatibility test device and test method |
-
2021
- 2021-03-25 CN CN202110323415.2A patent/CN113030444A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849238A (en) * | 2013-06-07 | 2016-08-10 | 巴斯夫欧洲公司 | Use of nitrogen compounds quaternised with alkylene oxide and hydrocarbyl-substituted polycarboxylic acid as additives in fuels and lubricants |
| CN108802343A (en) * | 2018-06-20 | 2018-11-13 | 冰轮环境技术股份有限公司 | A kind of high temperature heat pump lubricating oil and working medium compatibility test device and test method |
Non-Patent Citations (1)
| Title |
|---|
| 中国石油化工股份有限公司上海高桥分公司: "润滑油相容性测定法", 《Q/SH中国石油化工股份有限公司上海高桥分公司企业标准 Q/SHGQ.01.475-2002》 * |
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Application publication date: 20210625 |