CN101776557B - Device for testing grease evaporation rate in vacuum environment - Google Patents
Device for testing grease evaporation rate in vacuum environment Download PDFInfo
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- CN101776557B CN101776557B CN 200910259324 CN200910259324A CN101776557B CN 101776557 B CN101776557 B CN 101776557B CN 200910259324 CN200910259324 CN 200910259324 CN 200910259324 A CN200910259324 A CN 200910259324A CN 101776557 B CN101776557 B CN 101776557B
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Abstract
The invention relates to a device for testing grease evaporation rate in vacuum environment, belonging to the technical filed of space lubrication. The device comprises a test equipment cabinet, a vacuum pumping system, a vacuum chamber, a thermal control sample stage, a test quartz-crystal microbalance, a pollution monitoring quartz-crystal microbalance, a computer and a computer cabinet. The connection relationship is as follows: the vacuum chamber is communicated with the inner side of the vacuum pumping system, gas therebetween is sealed by a rubber sealing ring, and the vacuum chamber is connected with the vacuum pumping system through a bolt; the test equipment cabinet is connected with the outer side of the vacuum chamber through a bolt to play a role in support; the thermal control stage is positioned in the vacuum chamber, and an insulation mat is arranged between the thermal control stage and the vacuum chamber; the test quartz-crystal microbalance and the pollution monitoring quartz-crystal microbalance are arranged on the thermal control stage; and the computer is connected with the test quartz-crystal microbalance and the pollution monitoring quartz-crystal microbalance through data wires so as to test and process the data of the test quartz-crystal microbalance and the pollution monitoring quartz-crystal microbalance.
Description
Technical field
The present invention relates to a kind of device of testing grease evaporation rate in vacuum environment, belong to the space lubrication technical field.
Background technology
Grease based on the space application, saturated vapor pressure is to weigh its space serviceable life and examine one of important technology index that other sensing surfaces are polluted, the evaporation rate method is that the test space is used the most frequently used method of grease, this method of testing is that tested grease is put into evaporation boiler, the aperture that oil molecule covers by evaporation is evaporated in the vacuum chamber, permanent set is on the quartz crystal of scale pan or quartzy micro-crystal balance, measure the quality of condensing, obtain rate of evaporation, that is to say that the measurement of rate of evaporation is the key problem of its measurement.
Utilize in the evaporation rate method test grease saturated vapor pressure method of testing, the major defect of rate of evaporation test is: rate of evaporation is to obtain by the indirect measurement method for quality of condensing.Oil vapour has loss in the transmission course of space, and closely related with surface physical properties such as the temperature of oil vapour collection surface, roughness, and test error is bigger.
The present invention directly is applied in grease on the quartz crystal electrode of quartzy microcrystal microbalance, tests the rate of evaporation of grease.
Summary of the invention
The objective of the invention is to have proposed a kind of device of testing grease evaporation rate in vacuum environment in order to solve prior art indirect method of testing to the low bigger problem of rate of evaporation grease test error.
The proving installation of a kind of grease evaporation rate in vacuum environment of the present invention comprises: test rack, vacuum-pumping system, vacuum chamber, thermal control sample stage, test quartz crystal microbalance, pollution monitoring quartz crystal microbalance, computing machine and calculating rack.
The annexation of the proving installation of a kind of grease evaporation rate in vacuum environment of the present invention is: vacuum chamber communicates with vacuum-pumping system inside, by the rubber seal sealing gas, connects by bolt between the two; The test rack is connected by bolt with the vacuum chamber outside, plays a supportive role; The temperature control platform places in the vacuum chamber, is provided with mat insulation between temperature control platform and the vacuum chamber; Test quartz crystal microbalance, pollution monitoring quartz crystal microbalance place on the temperature control platform; Computing machine is connected by data line with test quartz crystal microbalance, pollution monitoring quartz crystal microbalance, is used for test processes test quartz crystal microbalance and pollution monitoring quartz crystal microbalance data.
The method of testing of a kind of grease evaporation rate in vacuum environment proving installation of the present invention, its concrete implementation step is as follows:
(1) a pair of twin quartz crystal in the cleaning test quartz crystal microbalance and a pair of twin quartz crystal in the contamination monitoring quartz crystal microbalance, (comprising a pair of twin quartz crystal in every quartz crystal microbalance), be placed on temperature then and be 23 ± 2 ℃, relative humidity and be in 50% the climatic chamber, stablize 1～4h;
(2) a slice quartz crystal in the test quartz crystal microbalance in (1) is taken out from climatic chamber, evenly smear one deck grease at this quartz crystal electrode district then, then put back in the climatic chamber, place 24～48h;
(3) together insert temperature control worktable in the vacuum chamber with another quartz crystal taking-up of a pair of quartz crystal in the contamination monitoring quartz crystal microbalance in (1) and test quartz crystal microbalance and with the quartz crystal of (2) preparation;
(4) with the oil-free vacuum extract system vacuum chamber is bled the variation of each quartz crystal frequency of opening entry then;
The difference of (5) establishing a pair of quartz crystal frequency of the test quartz crystal microbalance of record in (4) is Δ f
1, the difference of a pair of quartz crystal frequency of contamination monitoring quartz crystal microbalance of record is Δ f in (4)
2, utilizing formula (1) to calculate the frequency that changes because of the actual evaporation of grease is Δ f, utilizes formula (2) to calculate the evaporation quality of grease again, calculates grease evaporation rate by formula (3), wherein formula (1), formula (2), formula (3) are respectively:
Δf＝Δf
1-Δf
2 (1)
Δm＝A·Δf/S
f(2)
w＝Δm/A·t (3)
In the formula: Δ m represents the grease quality (unit is g) of giving vent to anger;
A represents that (unit is cm to effective piezoelectricity area
2), promptly stand the area that vibrates, just the area of the relative part between two electrodes on the crystal oscillator;
S
f(unit is Hz/gcm to the mass sensitivity of expression quartz crystal
-2);
W represents rate of evaporation;
T express time (unit is s).
Beneficial effect
(1) method of rate of evaporation on the direct testing lens of employing has reduced measuring error;
(2) adopt contamination monitoring quartz crystal microbalance surrounding being monitored to pollute in the test process, reduced test process environment requirement.
Description of drawings
Fig. 1 is the structural representation that the test space of the present invention is used grease evaporation rate;
Wherein: 1-test rack, 2-vacuum-pumping system, 3-vacuum chamber, 4-thermal control sample stage, 5-test quartz crystal microbalance, 6-pollution monitoring quartz crystal microbalance, 7-computing machine, 8-calculate rack.
Embodiment
Embodiment
Fig. 1 is the structural representation that the test space of the present invention is used grease evaporation rate, wherein, 1-test rack, 2-vacuum-pumping system, 3-vacuum chamber, 4-thermal control sample stage, 5-test quartz crystal microbalance, 6-pollution monitoring quartz crystal microbalance, 7-computing machine, 8-calculate rack.
(1) will test a pair of quartz crystal in the quartz crystal microbalance and a pair of quartz crystal in the contamination monitoring quartz crystal microbalance and clean up, wherein quartz crystal adopts all that AT cuts, 15MHz, Validity Test district diameter be 0.6cm; Be placed on temperature then and be 23 ± 2 ℃, relative humidity and be in 50% the climatic chamber, stablize 1h;
(2) a slice quartz crystal in the test quartz crystal microbalance in (1) is taken out from climatic chamber, evenly smear a sheaf space railway grease LWYZ-1 at this quartz crystal electrode district then, then put back in the climatic chamber, place 24～48h;
(3) together insert temperature control worktable in the vacuum chamber with another quartz crystal taking-up of a pair of quartz crystal in the contamination monitoring quartz crystal microbalance in (1) and test quartz crystal microbalance and with the quartz crystal of (2) preparation;
(4) with the oil-free vacuum extract system vacuum chamber being pumped to vacuum tightness then is 2.6 * 10
-4Pa, the temperature of worktable is set to 30 ℃;
(5) after temperature control platform temperature reaches 30 ℃, stablize 30 minutes after, recording test quartz crystal microbalance reading is 2554MHz; The reading of contamination monitoring quartz crystal microbalance is 84MHz; As can be known, this grease is 2.7 * 10 at 30 ℃ rate of evaporation
-9G/s.
Claims (1)
1. the device of a testing grease evaporation rate in vacuum environment is characterized in that this device comprises: test rack (1), vacuum-pumping system (2), vacuum chamber (3), thermal control sample stage (4), test quartz crystal microbalance (5), pollution monitoring quartz crystal microbalance (6), computing machine (7) and calculating rack (8); Its annexation is: vacuum chamber (1) links to each other with vacuum sampling system (2) is inner, by the rubber seal sealing gas, connects by bolt between the two; Test rack (1) is connected by bolt with vacuum chamber (3) is outside, plays a supportive role; Thermal control sample stage (4) places in the vacuum chamber, is provided with mat insulation between thermal control sample stage (4) and the vacuum chamber (3); Test quartz crystal microbalance (5), pollution monitoring quartz crystal microbalance (6) place on the thermal control sample stage (4); Computing machine (7) is connected by data line with test quartz crystal microbalance (5), pollution monitoring quartz crystal microbalance (6), is used for the micro-day data of test processes test quartz crystal microbalance and pollution monitoring quartz crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910259324 CN101776557B (en) | 2009-12-17 | 2009-12-17 | Device for testing grease evaporation rate in vacuum environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910259324 CN101776557B (en) | 2009-12-17 | 2009-12-17 | Device for testing grease evaporation rate in vacuum environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101776557A CN101776557A (en) | 2010-07-14 |
| CN101776557B true CN101776557B (en) | 2011-08-31 |
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ID=42513073
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910259324 Active CN101776557B (en) | 2009-12-17 | 2009-12-17 | Device for testing grease evaporation rate in vacuum environment |
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| Country | Link |
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| CN (1) | CN101776557B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980832B (en) * | 2012-11-20 | 2014-11-05 | 中国航天科技集团公司第五研究院第五一〇研究所 | System and method for in-situ monitoring of quality loss of non-metallic material in vacuum |
| CN103969151B (en) * | 2014-05-29 | 2016-05-25 | 广州标际包装设备有限公司 | Evaporation residue analyzer |
| CN113466080B (en) * | 2021-07-09 | 2023-03-21 | 上海紫华薄膜科技有限公司 | Batch evaporation rate testing device |
| CN117191924B (en) * | 2023-08-03 | 2024-04-05 | 哈尔滨工业大学 | Molecular pollutant in-situ analysis detection device with high-efficiency separation and dynamic characterization |
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2009
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| Publication number | Publication date |
|---|---|
| CN101776557A (en) | 2010-07-14 |
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