CN101059406A - Disabled grease mechanical impurity separation method - Google Patents
Disabled grease mechanical impurity separation method Download PDFInfo
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- CN101059406A CN101059406A CN 200710054423 CN200710054423A CN101059406A CN 101059406 A CN101059406 A CN 101059406A CN 200710054423 CN200710054423 CN 200710054423 CN 200710054423 A CN200710054423 A CN 200710054423A CN 101059406 A CN101059406 A CN 101059406A
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Abstract
The invention discloses a failure lubricant mechanical foreigner separating method, comprising that weighting failure lubricant, immerging and dissolving petrol, mixing ultrasonic wave, depositing eccentrically, removing upper liquid, repeating adding mixture solvent, mixing via ultrasonic wave, depositing eccentrically, and removing upper lubricant for three times, filtering via filter paper, weighting, analyzing via microscope, and calculating out the content of mechanical foreigner material. The invention has the advantages that the mechanical foreigner material is separated from failure lubricant in normal temperature, without heating and accident as fire, to improve test safety, resolve the problem that the lubricant will be cooled and condensed on paper filter caused by heating solvent and filtering directly, which will affect the weight of foreigner material. The invention has simple operation, accurate result, and the application for testing mechanical foreigner material of failure lubricant, while the solvent is general one, which can be dissolved and washed repeatedly, with quick separation and easy operation.
Description
Technical field
The invention belongs to a kind of analytical approach of mechanical impurity of railway grease, relate generally to a kind of disabled grease mechanical impurity separation method.
Background technology
Contain mechanical vibration and noise that mechanical impurity can cause motor in the railway grease, will cause the wearing and tearing of mechanical component, cause the inefficacy of mechanical component the most at last and scrap.A lot of railway grease all use among the solid pollution substance environment.The reason of sneaking into solid pollutant is a lot, mainly is: sneak into (for example grinding fragment, welding fragment etc.) during device assembles; Sneak into (for example sand, machining object, handled thing etc.) in the use from the outside; Produce (powder that for example weares and teares, deterioration product etc.) by the lubricant housings.When the granule size of pollutant is bigger than the thickness of bearing surface lubricant film, can cause wearing and tearing; The hardness of pollutant will produce wearing and tearing during greater than the hardness of bearing material.So in the railway grease (inefficacys) after using the content of mechanical impurity and composition detection to the grinding situation of analyzing mechanical component with cause failure reasons to seem particularly important.Domestic grease mechanical impurity is measured general acid decomposition and the microscopic method of adopting and is measured, acid decomposition is railway grease to be heated back with 10% hydrochloric acid and sherwood oil heat up in a steamer (not seething with excitement), stirs soap is all dissolved, and filters then, with impurity washing, oven dry, weigh.The method is applicable to the Determination on content of the mechanical impurity that is insoluble to acid, sherwood oil (industrial naptha or benzene) ethanol-benzene and distilled water in the railway grease.Microscopic method is railway grease to be coated on the glass numeration plate observe with microscope, to measure the size and the quantity of mechanical impurity particle in the railway grease.These two kinds of standard methods all are the measurements that is used for measuring untapped railway grease mechanical impurity.
Disabled grease is because process uses wearer and foreign matter enters contaminated and the oxidation of railway grease own, and some impurity is difficult to differentiate, and can't accurately measure the size and the quantity of mechanical impurity particle with microscopic method; Because of having many metal removal things to exist in the railway grease after using, the dissolving of metal removal thing can't can be analyzed the major metal composition of wearing and tearing with acid decomposition.Above-mentioned two kinds of methods all can't be analyzed the mechanical impurity in the railway grease that uses the back inefficacy.The content and the kind of the mechanical impurity in the check and analysis railway grease at first will effectively be separated mechanical impurity from railway grease exactly.Railway grease is because of its dissolving difficulty, and mechanical impurity mixes among railway grease, is difficult to it is effectively separated.If add direct filtration behind the heat soaking dissolving railway grease with organic solvent, the solvent heated volatile is serious, operating difficulties, and railway grease is subjected to the air cooling during filtration, and railway grease can be separated out to be deposited on and be made filtration difficulty on the filter paper, and mechanical impurity still can not effectively separate.Therefore the mechanical impurity separation is a difficult problem always in the disabled grease.
Summary of the invention
The purpose of this invention is to provide a kind of disabled grease mechanical impurity separation method, it can be separated mechanical impurity from railway grease effectively, its impurity is analyzed more exactly, its kind, grain size etc. can both be passed judgment on intuitively, for the mechanical component failure cause analysis provides reliable data.
Purpose of the present invention can adopt following technical scheme to realize: described disabled grease mechanical impurity separation method is: under normal temperature condition, accurately weighing 5～20 restrains disabled greases (W), be placed in 300 ml beakers, add 200 milliliters of No. 120 industrial napthas and add a cover the immersion dissolving after 2 hours, after ultrasound wave stirs and is no less than 5 minutes, after making it layering in centrifugal settling 3-5 under 400-500 rev/min the rotating speed minute, slowly top solution is shifted out 150 milliliters with transfer pipet, add 150 milliliters of ethanol-benzene mixed solvent ultrasound wave stirring and dissolving again, stir after 3-5 minute after centrifugal settling 3-5 under 400-500 rev/min the rotating speed minute, top solution is shifted out 150 milliliters with transfer pipet; Add 100 milliliters of mixed solvent ultrasound waves again and stir, 100 milliliters of top solvents are shifted out in the centrifugal settling layering; Add 100 milliliters of mixed solvents stirrings, centrifugal settling layering again, shift out 100 milliliters of top solvents; After adding 50 milliliters of mixed solvents stirrings at last, with the quantitative filter paper (W of constant weight
0) filter, during filtration with mixed solvent with beaker wash 2-3 time, impurity all is filled on the filter paper, dry weighing (W
1), microscopic examination grain size and kind calculate content of impurities at last, content of impurities (%)=[(W
1-W
0)/W] * 100%
Above-mentioned separating technology can be explained with following mode:
Disabled grease is weighed---and gasoline soaks dissolving---the ultrasound wave stirring---centrifugal settling---shift out top fluid---(add mixed solvent---the ultrasound wave stirring---centrifugal settling---shift out top fluid) 3 times repeatedly---the filter paper filtering microscopic analyses of---weighing---
Calculating machine impurity content (%)=[(W
1-W
0)/W] * 100%
Separation principle of the present invention: the principle that centrifugal solid-liquid separates, mechanical impurity is insoluble to organic solvent oil, and than grease, organic solvent than great, easily centrifugal settling is in the bottom.Disabled grease soaked 2 hours with industrial naptha, can be with the abundant swelling of railway grease, dissolving, ultrasound wave stirs and is no less than 5 minutes, can be with the railway grease stirring and dissolving of soaking, be dispersed in the solvent fully, impurity and railway grease are separated, under 400-500 rev/min rotating speed, impurity can be deposited in beaker bottom in centrifuging 3-5 minute, and don't railway grease centrifugal settling is condensed in the bottom, with the mixed liquor sucking-off of transfer pipet the railway grease and the solvent on upper strata 2/3; Through 4 dissolvings, centrifugal settling, separate, fully railway grease is separated with impurity, railway grease is dispersed in the solvent shifts out, make mechanical impurity stay beaker bottom, do not have railway grease in the final solvent substantially, last impurity that cleans up and solvent filter are easier to, filter with quantitative filter paper under the normal temperature, beaker is rinsed well, all move on to the impurity in the beaker on the filter paper with a small amount of solvent; With filter paper oven dry cooling constant weight, weigh, calculate.Disabled grease weight should be got the 5-20 gram, and sample is less, and measuring error is bigger, and sample is too many, needs with more solvent, and bigger container separates, and operation is difficulty, so the railway grease sample heavily should select the 5-20 gram to be advisable.The method error is a positive error, because still have a spot of railway grease to exist in the solvent, being deposited on during filtration influences impurity weight on the filter paper, and sample is few more, and impurity level is few more, and is just big more to result's influence.
The innovative point of this patent is that mechanical impurity normal temperature from the railway grease that lost efficacy is separated, and need not heat, and a difficult problem of having avoided solvent heating easy firing to cause danger has improved the security of testing; The method that adopts the centrifugal solid-liquid separation, after the centrifuging shifts out the top solvent disabled grease stirring solvent dispersing and dissolving, precipitation is separated with solvent cleaning repeatedly, and the railway grease on the solid impurity is washed, and the impurity separation cleans up, filter velocity is fast, and weighing result is accurate; The railway grease cooling condenses in filtration difficulty on the filter paper when having solved the heated solvent direct filtration, and influences the impurity weigh; Easy and convenient to handle, the result is accurate.This separation method is applicable to the mechanical impurity mensuration of disabled grease, and selecting solvent for use is common solvent, easily purchases, and repeatedly dissolving is cleaned, and separation is fast, and is easy to operate easy.
Embodiment
Embodiment 1: under normal temperature condition, accurately the disabled grease lithium saponify 19.48 of weighing known impurity level 7.80% restrains (W), be placed in 300 ml beakers, add 200 milliliters of No. 120 industrial napthas and add a cover the immersion dissolving after 2 hours, after ultrasound wave stirs and is no less than 5 minutes, after centrifugal settling under 400 rev/mins the rotating speed made it layering in 3 minutes, slowly top solution is shifted out 150 milliliters with transfer pipet, add 150 milliliters of ethanol-benzene mixed solvent ultrasound wave stirring and dissolving again, stir after 3 minutes and after 3 minutes, top solution is shifted out 150 milliliters with transfer pipet in centrifugal settling under 400 rev/mins the rotating speed; Add 100 milliliters of mixed solvent ultrasound waves again and stir, 100 milliliters of top solvents are shifted out in the centrifugal settling layering; Add 100 milliliters of mixed solvents stirrings, centrifugal settling layering again, shift out 100 milliliters of top solvents; After adding 50 milliliters of mixed solvents stirrings at last, with the quantitative filter paper 1.00 gram (W of constant weight
0) filter, during filtration with mixed solvent with beaker flushing 2 times, impurity all is filled on the filter paper, the oven dry weighing is 2.53 gram (W
1), microscopic examination grain size and kind calculate content of impurities at last, content of impurities (%)=[(W
1-W
0)/W] * 100%
＝[(2.53-1.00)/19.48]*100％
＝7.85％
Absolute error 0.05%
Embodiment 2: under normal temperature condition, accurately the disabled grease lithium saponify 15.00 of weighing known impurity level impurity content 6.93% restrains (W), be placed in 300 ml beakers, add 200 milliliters of No. 120 industrial napthas and add a cover the immersion dissolving after 2 hours, after ultrasound wave stirs and is no less than 5 minutes, after centrifugal settling under 500 rev/mins the rotating speed made it layering in 4 minutes, slowly top solution is shifted out 150 milliliters with transfer pipet, add 150 milliliters of ethanol-benzene mixed solvent ultrasound wave stirring and dissolving again, stir after 3 minutes and after 4 minutes, top solution is shifted out 150 milliliters with transfer pipet in centrifugal settling under 500 rev/mins the rotating speed; Add 100 milliliters of mixed solvent ultrasound waves again and stir, 100 milliliters of top solvents are shifted out in the centrifugal settling layering; Add 100 milliliters of mixed solvents stirrings, centrifugal settling layering again, shift out 100 milliliters of top solvents; After adding 50 milliliters of mixed solvents stirrings at last, with the quantitative filter paper 1.00 gram (W of constant weight
0) filter, during filtration with mixed solvent with beaker flushing 2 times, impurity all is filled on the filter paper, the oven dry weighing is 2.06 gram (W
1), microscopic examination grain size and kind calculate content of impurities at last, content of impurities (%)=[(W
1-W
0)/W] * 100%
＝[(2.06-1.00)/15.00]*100％
＝7.07％
Absolute error 0.14%.
Embodiment 3: under normal temperature condition, accurately the disabled grease lithium saponify 10.01 of weighing known impurity level 5.09% restrains (W), be placed in 300 ml beakers, add 200 milliliters of No. 120 industrial napthas and add a cover the immersion dissolving after 2 hours, after ultrasound wave stirs and is no less than 5 minutes, after centrifugal settling under 500 rev/mins the rotating speed made it layering in 5 minutes, slowly top solution is shifted out 150 milliliters with transfer pipet, add 150 milliliters of ethanol-benzene mixed solvent ultrasound wave stirring and dissolving again, stir after 3 minutes, after 5 minutes, top solution is shifted out 150 milliliters in centrifugal settling under 500 rev/mins the rotating speed with transfer pipet; Add 100 milliliters of mixed solvent ultrasound waves again and stir, 100 milliliters of top solvents are shifted out in the centrifugal settling layering; Add 100 milliliters of mixed solvents stirrings, centrifugal settling layering again, shift out 100 milliliters of top solvents; After adding 50 milliliters of mixed solvents stirrings at last, with the quantitative filter paper 1.00 gram (W of constant weight
0) filter, during filtration with mixed solvent with beaker flushing 2 times, impurity all is filled on the filter paper, the oven dry weighing is 1.53 gram (W
1), microscopic examination grain size and kind calculate content of impurities at last, content of impurities (%)=[(W
1-W
0)/W] * 100%
＝[(1.53-1.00)/10.01]*100％
＝5.29％
Absolute error 0.20%.
Claims (2)
1, a kind of disabled grease mechanical impurity separation method is characterized in that: its separation method is as follows: disabled grease is weighed---and gasoline soaks dissolving---the ultrasound wave stirring---centrifugal settling---shift out top fluid---(add mixed solvent---the ultrasound wave stirring---centrifugal settling---shift out top fluid) 3 times repeatedly---filter paper filtering------microscopic analysis---calculating machine impurity contents of weighing.
2, disabled grease mechanical impurity separation method according to claim 1, it is characterized in that: its separation method is as follows: under normal temperature condition, weighing 5～20 gram disabled greases (W), be placed in 300 ml beakers, add 200 milliliters of No. 120 industrial napthas and add a cover the immersion dissolving after 2 hours, after ultrasound wave stirs and is no less than 5 minutes, after making it layering in centrifugal settling 3-5 under 400-500 rev/min the rotating speed minute, slowly top solution is shifted out 150 milliliters with transfer pipet, add 150 milliliters of ethanol-benzene mixed solvent ultrasound wave stirring and dissolving again, stir after 3-5 minute after centrifugal settling 3-5 under 400-500 rev/min the rotating speed minute, top solution is shifted out 150 milliliters with transfer pipet; Add 100 milliliters of mixed solvent ultrasound waves again and stir, 100 milliliters of top solvents are shifted out in the centrifugal settling layering; Add 100 milliliters of mixed solvents stirrings, centrifugal settling layering again, shift out 100 milliliters of top solvents; After adding 50 milliliters of mixed solvents stirrings at last, with the quantitative filter paper (W of constant weight
0) filter, during filtration with mixed solvent with beaker wash 2-3 time, impurity all is filled on the filter paper, dry weighing (W
1), microscopic examination grain size and kind calculate content of impurities at last, content of impurities (%)=[(W
1-W
0)/W] * 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710054423A CN100594367C (en) | 2007-05-18 | 2007-05-18 | Disabled grease mechanical impurity separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710054423A CN100594367C (en) | 2007-05-18 | 2007-05-18 | Disabled grease mechanical impurity separation method |
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| Publication Number | Publication Date |
|---|---|
| CN101059406A true CN101059406A (en) | 2007-10-24 |
| CN100594367C CN100594367C (en) | 2010-03-17 |
Family
ID=38865624
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710054423A Expired - Fee Related CN100594367C (en) | 2007-05-18 | 2007-05-18 | Disabled grease mechanical impurity separation method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607985A (en) * | 2012-03-06 | 2012-07-25 | 济南康众医药科技开发有限公司 | Water separation method for detecting impurity content and impurity categories of medicinal montmorillonite |
| CN104454997A (en) * | 2014-11-17 | 2015-03-25 | 无锡市百顺机械厂 | Cleaning process for bearing |
| CN105241881A (en) * | 2015-11-02 | 2016-01-13 | 四川北方硝化棉股份有限公司 | Method for detecting impurity content in nitrocellulose |
| CN105255368A (en) * | 2015-10-09 | 2016-01-20 | 同济大学 | Method for screening micron and submicron polishing solution for ultra-precision polishing |
| CN109387546A (en) * | 2018-11-01 | 2019-02-26 | 西安交通大学 | A kind of bearing grease failure monitor method based on quantum dot gas sensor |
| CN111366447A (en) * | 2020-04-20 | 2020-07-03 | 广州机械科学研究院有限公司 | Method for rapidly dissolving lithium-based lubricating grease |
| CN117233222A (en) * | 2023-11-14 | 2023-12-15 | 技源集团股份有限公司 | Impurity content detecting system of HMB-Ca |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE524469C2 (en) * | 2002-12-12 | 2004-08-10 | Alfa Laval Corp Ab | When cleaning oil from polluting particles, put in a centrifugal separator |
| CN1317362C (en) * | 2005-09-28 | 2007-05-23 | 许盛英 | Method for purifying aviation kerosene |
| CN1962837B (en) * | 2006-11-17 | 2011-09-28 | 山东华联矿业股份有限公司 | Process for regeneration of waste lubricating oil |
-
2007
- 2007-05-18 CN CN200710054423A patent/CN100594367C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607985A (en) * | 2012-03-06 | 2012-07-25 | 济南康众医药科技开发有限公司 | Water separation method for detecting impurity content and impurity categories of medicinal montmorillonite |
| CN104454997A (en) * | 2014-11-17 | 2015-03-25 | 无锡市百顺机械厂 | Cleaning process for bearing |
| CN105255368A (en) * | 2015-10-09 | 2016-01-20 | 同济大学 | Method for screening micron and submicron polishing solution for ultra-precision polishing |
| CN105241881A (en) * | 2015-11-02 | 2016-01-13 | 四川北方硝化棉股份有限公司 | Method for detecting impurity content in nitrocellulose |
| CN105241881B (en) * | 2015-11-02 | 2018-06-29 | 四川北方硝化棉股份有限公司 | A kind of method of impurity content in detection cellulose nitrate |
| CN109387546A (en) * | 2018-11-01 | 2019-02-26 | 西安交通大学 | A kind of bearing grease failure monitor method based on quantum dot gas sensor |
| CN109387546B (en) * | 2018-11-01 | 2020-06-02 | 西安交通大学 | Bearing lubricating grease failure monitoring method based on quantum dot gas sensor |
| CN111366447A (en) * | 2020-04-20 | 2020-07-03 | 广州机械科学研究院有限公司 | Method for rapidly dissolving lithium-based lubricating grease |
| CN117233222A (en) * | 2023-11-14 | 2023-12-15 | 技源集团股份有限公司 | Impurity content detecting system of HMB-Ca |
| CN117233222B (en) * | 2023-11-14 | 2024-01-26 | 技源集团股份有限公司 | Impurity content detecting system of HMB-Ca |
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| Publication number | Publication date |
|---|---|
| CN100594367C (en) | 2010-03-17 |
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