CN103698248B - A kind of method of measuring lubricating oil high-temp density - Google Patents
A kind of method of measuring lubricating oil high-temp density Download PDFInfo
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Abstract
The invention belongs to lubricants performance determination techniques, relate to the improvement to lubricating oil density inspect method. It is characterized in that, the step of measuring lubricating oil high-temp density is as follows: the volume ν of calculated specific gravity bottle; Calculate the density p of sample in the time that temperature is tt. The method that the present invention proposes 100 DEG C～250 DEG C of lubricating oil density of a kind of energy Accurate Determining, can meet the development and application requirement of high temperature aeroengine oil.
Description
Technical field
The invention belongs to lubricants performance determination techniques, relate to the improvement to lubricating oil density inspect method.
Background of invention
Along with the raising of temperature before aero-turbine, engine lubrication system temperature also improves thereupon,Therefore the serviceability temperature of aeroengine oil is required also just more and more higher. At present, service aircraft engine is usedAeroengine oil, its maximum operation (service) temperature reaches 200 DEG C; The highest to aeroengine oil that design department proposesServiceability temperature requires to reach 250 DEG C. Density is the Fundamental Physical Properties of aeroengine oil, and temperature on density has brightAobvious impact, therefore needs to know that density under different serviceability temperatures and maximum operation (service) temperature is using as lubricatedThe design parameter of oil. The test method of measuring lubricating oil density has following two kinds:
(1) GB GB/T1884 " oil and oil product densitometry (densimeter method) ", the partyMethod is that sample is packed in the graduated cylinder of given size, and the sample of densitometer being put into modulated good temperature is also quietOnly, when temperature reaches after balance, read densitometer scale reading and test temperature, as result of the test.
(2) GB GB/T2540 " oil product densitometry (bottle method) ", the method be bySample injects the capillary plug type specific gravity bottle of determining water number, adds stopper, immerse in water bath with thermostatic control,The specific gravity bottle of weighing after temperature reaches balance, the formula bulk density then specifying by method. Above-mentioned two kindsMethod can only be measured the density of 100 DEG C of following oil products.
The object of the invention is: a kind of method that can measure 100 DEG C～250 DEG C of lubricating oil density is proposed, withMeet the development and application requirement of high temperature aeroengine oil.
Technical scheme of the present invention is: a kind of method of measuring lubricating oil high-temp density, and based on a temperature controlPrecision is the oil bath device of ± 0.5 DEG C, it is characterized in that, the step of measuring lubricating oil high-temp density is as follows:
1, the volume ν of calculated specific gravity bottle:
1.1, oil bath device preheating for the first time: the temperature of oil bath device is heated to 90 DEG C ± 0.5 DEG C and guarantorHold constant temperature;
1.2, the density p at 90 DEG C by GB GB/T1884 mensuration candidate oil90, unit is g/cm3；
1.3, candidate oil preheating for the first time: it is m that candidate oil is filled to quality0Quartz glass systemSpecific gravity bottle in, unit is g, puts into the glass that identical candidate oil is housed with the good specific gravity bottle of stainless steel wire boltIn glass container, then glass container is placed in to oil bath device, is incubated at least 1h;
1.4, weigh for the first time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m1, unitFor g;
1.5 calculate the volume ν of quartz glass specific gravity bottle processed:
ν=（m1-m0）/ρ90…………………………………………………………[1]
2, calculate the density p of sample in the time that temperature is tt:
2.1, oil bath device preheating for the second time: oil bath device is heated to the probe temperature t needing and keepsConstant temperature, t=100 DEG C～250 DEG C;
2.2, candidate oil preheating for the second time: again candidate oil is filled to quartz glass specific gravity bottle processed,Again put into the glass container that identical candidate oil is housed with the good specific gravity bottle of stainless steel wire bolt, then by glassGlass container is placed in oil bath device, is incubated at least 1h;
2.3, weigh for the second time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m2, unitFor g;
2.4, bulk density ρt:
ρt=（m2-m0）/ν…………………………………………………………[2]
So far, complete the mensuration of lubricating oil high-temp density.
Advantage of the present invention is: having proposed one, can to compare 100 DEG C～250 DEG C lubricating oil of Accurate Determining closeThe method of degree, to meet the development and application requirement of high temperature aeroengine oil.
Detailed description of the invention
Below the present invention is described in further details. Measure a method for lubricating oil high-temp density, baseBe the oil bath device of ± 0.5 DEG C in a temperature-controlled precision, it is characterized in that, mensuration lubricating oil high-temp densityStep is as follows:
1, the volume ν of calculated specific gravity bottle:
1.1, oil bath device preheating for the first time: the temperature of oil bath device is heated to 90 DEG C ± 0.5 DEG C and guarantorHold constant temperature;
1.2, the density p at 90 DEG C by GB GB/T1884 mensuration candidate oil90, unit is g/cm3；
1.3, candidate oil preheating for the first time: it is m that candidate oil is filled to quality0Quartz glass systemSpecific gravity bottle in, unit is g, puts into the glass that identical candidate oil is housed with the good specific gravity bottle of stainless steel wire boltIn glass container, then glass container is placed in to oil bath device, is incubated at least 1h;
1.4, weigh for the first time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m1, unitFor g;
1.5 calculate the volume ν of quartz glass specific gravity bottle processed:
ν=（m1-m0）/ρ90…………………………………………………………[1]
2, calculate the density p of sample in the time that temperature is tt:
2.1, oil bath device preheating for the second time: oil bath device is heated to the probe temperature t needing and keepsConstant temperature, t=100 DEG C～250 DEG C;
2.2, candidate oil preheating for the second time: again candidate oil is filled to quartz glass specific gravity bottle processed,Again put into the glass container that identical candidate oil is housed with the good specific gravity bottle of stainless steel wire bolt, then by glassGlass container is placed in oil bath device, is incubated at least 1h;
2.3, weigh for the second time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m2, unitFor g;
2.4, bulk density ρt:
ρt=（m2-m0）/ν…………………………………………………………[2]
So far, complete the mensuration of lubricating oil high-temp density.
Operation principle of the present invention is: aeroengine oil belongs to non-volatile oil product, by GB/T1884 sideMethod can be tested its density of 90 DEG C. Adopting quartz glass specific gravity bottle processed, it is at 90 DEG C～250 DEG C temperature modelsEnclosing expansion can ignore. Specific gravity bottle and the glass container combination that uniform temp, identical candidate oil are housedBecome unified test cell, then be placed in the heating oil bath constant temperature under probe temperature, thereby realize lubricating oilSample is in the mensuration of 100 DEG C～250 DEG C of density.
Embodiment 1: measure KXY aeroengine oil the density of 150 DEG C
1, the volume ν of calculated specific gravity bottle:
1.1, oil bath device preheating for the first time: the temperature of oil bath device is heated to 90 DEG C ± 0.5 DEG C and guarantorHold constant temperature;
1.2, the density p at 90 DEG C by GB GB/T1884 mensuration candidate oil90=1.0350, unitFor g/cm3；
1.3, candidate oil preheating for the first time: it is m that candidate oil is filled to quality0=17.9635 stoneIn the specific gravity bottle of English glass system, unit is g, puts into identical lubricating oil is housed with the good specific gravity bottle of stainless steel wire boltIn the glass container of sample, then glass container is placed in to oil bath device, is incubated at least 1h;
1.4, weigh for the first time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m1=44.4194，Unit is g;
1.5 calculate the volume ν of quartz glass specific gravity bottle processed:
ν=（m1-m0）/ρ90=（44.4194-17.9635）/1.0350=25.5613
2, calculate the density p of sample in the time that temperature is 150 DEG C150:
2.1, oil bath device preheating for the second time: oil bath device is heated to 150 DEG C ± 0.5 DEG C and keep constant temperature;
2.2, candidate oil preheating for the second time: again candidate oil is filled to quartz glass specific gravity bottle processed,Again put into the glass container that identical candidate oil is housed with the good specific gravity bottle of stainless steel wire bolt, then by glassGlass container is placed in oil bath device, is incubated at least 1h;
2.3, weigh for the second time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m2=42.8883，Unit is g;
2.4, bulk density ρ150:
ρ150=（m2-m0）/ν=（42.8883-17.9635）/25.5613=0.9751
So far, complete the mensuration of 150 DEG C of density of lubricating oil.
Embodiment 2: measure KXY aeroengine oil the density of 200 DEG C
1, the volume ν of calculated specific gravity bottle:
1.1, oil bath device preheating for the first time: the temperature of oil bath device is heated to 90 DEG C ± 0.5 DEG C and guarantorHold constant temperature;
1.2, the density p at 90 DEG C by GB GB/T1884 mensuration candidate oil90=1.0350, unitFor g/cm3；
1.3, candidate oil preheating for the first time: it is m that candidate oil is filled to quality0=17.9635 stoneIn the specific gravity bottle of English glass system, unit is g, puts into identical lubricating oil is housed with the good specific gravity bottle of stainless steel wire boltIn the glass container of sample, then glass container is placed in to oil bath device, is incubated at least 1h;
1.4, weigh for the first time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m1=44.4194，Unit is g;
1.5 calculate the volume ν of quartz glass specific gravity bottle processed:
ν=（m1-m0）/ρ90=（44.4194-17.9635）/1.0350=25.5613
2, calculate the density p of sample in the time that temperature is 200 DEG C200:
2.1, oil bath device preheating for the second time: oil bath device is heated to 200 DEG C ± 0.5 DEG C and keep constant temperature;
2.2, candidate oil preheating for the second time: again candidate oil is filled to quartz glass specific gravity bottle processed,Again put into the glass container that identical candidate oil is housed with the good specific gravity bottle of stainless steel wire bolt, then by glassGlass container is placed in oil bath device, is incubated at least 1h;
2.3, weigh for the second time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m2=41.6077，Unit is g;
2.4, bulk density ρ200:
ρ200=（m2-m0）/ν=（41.6077-17.9635）/25.5613=0.9250
So far, complete the mensuration of 200 DEG C of density of lubricating oil.
Embodiment 3: measure KXY aeroengine oil the density of 250 DEG C
1, the volume ν of calculated specific gravity bottle:
1.1, oil bath device preheating for the first time: the temperature of oil bath device is heated to 90 DEG C ± 0.5 DEG C and guarantorHold constant temperature;
1.2, the density p at 90 DEG C by GB GB/T1884 mensuration candidate oil90=1.0350, unitFor g/cm3；
1.3, candidate oil preheating for the first time: it is m that candidate oil is filled to quality0=17.9635 stoneIn the specific gravity bottle of English glass system, unit is g, puts into identical lubricating oil is housed with the good specific gravity bottle of stainless steel wire boltIn the glass container of sample, then glass container is placed in to oil bath device, is incubated at least 1h;
1.4, weigh for the first time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m1=44.4194，Unit is g;
1.5 calculate the volume ν of quartz glass specific gravity bottle processed:
ν=（m1-m0）/ρ90=（44.4194-17.9635）/1.0350=25.5613
2, calculate the density p of sample in the time that temperature is 250 DEG C200:
2.1, oil bath device preheating for the second time: oil bath device is heated to 250 DEG C ± 0.5 DEG C and keep constant temperature;
2.2, candidate oil preheating for the second time: again candidate oil is filled to quartz glass specific gravity bottle processed,Again put into the glass container that identical candidate oil is housed with the good specific gravity bottle of stainless steel wire bolt, then by glassGlass container is placed in oil bath device, is incubated at least 1h;
2.3, weigh for the second time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass specific gravity bottle processed,Wipe clean the remaining lubricating oil in specific gravity bottle outside, naturally cool to room temperature, weigh, quality is m2=39.5602，Unit is g;
2.4, bulk density ρ250:
ρ250=（m2-m0）/ν=（39.5602-17.9635）/25.5613=0.8449
So far, complete the mensuration of 250 DEG C of density of lubricating oil.
Claims (1)
1. measuring a method for lubricating oil high-temp density, is the oil of ± 0.5 DEG C based on a temperature-controlled precisionBath apparatus, is characterized in that, the step of measuring lubricating oil high-temp density is as follows:
1.1, the volume ν of calculated specific gravity bottle:
1.1.1, oil bath device preheating for the first time: the temperature of oil bath device is heated to 90 DEG C ± 0.5 DEG C alsoKeep constant temperature;
1.1.2, the density p at 90 DEG C by GB GB/T1884 mensuration candidate oil90, unit isg/cm3；
1.1.3, candidate oil preheating for the first time: it is m that candidate oil is filled to quality0Quartz glassIn the specific gravity bottle of system, unit is g, puts into identical candidate oil is housed with stainless steel wire bolt good specific gravity bottleIn glass container, then glass container is placed in to oil bath device, is incubated at least 1h;
1.1.4, weigh for the first time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass proportion processedBottle, wipes clean the remaining lubricating oil in specific gravity bottle outside, naturally cools to room temperature, weighs, and quality is m1，Unit is g;
1.1.5 calculate the volume ν of quartz glass specific gravity bottle processed:
ν=（m1-m0）/ρ90…………………………………………………………[1]
1.2, calculate the density p of sample in the time that temperature is tt:
1.2.1, oil bath device preheating for the second time: oil bath device is heated to the probe temperature t needing and protectsHold constant temperature, t=100 DEG C～250 DEG C;
1.2.2, candidate oil preheating for the second time: again candidate oil is filled to quartz glass proportion processedBottle, puts into the glass container that identical candidate oil is housed again with the good specific gravity bottle of stainless steel wire bolt, thenGlass container is placed in to oil bath device, is incubated at least 1h;
1.2.3, weigh for the second time the weight of charge of oil quartz glass specific gravity bottle processed: take out quartz glass proportion processedBottle, wipes clean the remaining lubricating oil in specific gravity bottle outside, naturally cools to room temperature, weighs, and quality is m2，Unit is g;
1.2.4, bulk density ρt:
ρt=（m2-m0）/ν…………………………………………………………[2]
So far, complete the mensuration of lubricating oil high-temp density.
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