CN103822077A - Surface design method for controlling creeping up lose of space liquid lubricants - Google Patents
Surface design method for controlling creeping up lose of space liquid lubricants Download PDFInfo
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- CN103822077A CN103822077A CN201410057634.0A CN201410057634A CN103822077A CN 103822077 A CN103822077 A CN 103822077A CN 201410057634 A CN201410057634 A CN 201410057634A CN 103822077 A CN103822077 A CN 103822077A
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Abstract
The invention provides a surface design method for controlling creeping up loss of space liquid lubricants. The surface design method includes: firstly, judging the temperature gradient direction on the friction surface of a moving component, and if the temperature gradient direction is singular, machining regularly-arranged micro-groove arrays in the friction surface through the surface micro machining technology; if multiple of temperature gradient directions exist, machining regularly-arranged micro-pit arrays in the friction surface through the surface micro machining technology, wherein the depth of a pit or a groove ranges from 5 micrometers to 100 micrometers, the area ratio ranges from 0% to 70%, and the width of the pit or the groove ranges from 10 micrometers to 500 micrometers. The friction surface of a space moving part has good inhibiting effect on creeping up of the lubricants, creeping up loss due to temperature gradients of the lubricants can be effectively prevented, and service life of the components is prolonged.
Description
Technical field
The present invention relates to space and lubricate and precision optical machinery field, specifically a kind of surface design method of controlling space fluid lubricant creep loss.
Background technique
Creep (creep or migration), refers to that oiling agent is at contact surface, is not subject to External Force Acting and the phenomenon of continuous expansion.Flourish along with China's aerospace industry, the significance of space lubrication technology has obtained more and more general understanding, and lubrication failure becomes the major obstacle in restricted quarter mechanical system life-span just gradually.Liquid lubrication has the plurality of advantages such as self-reparing capability is strong, low friction coefficient, long service life, and its research and using value also become more and more higher.But for liquid lubrication, due to the complex environment such as microgravity, vacuum factor, Lubricants lacks the supplementary mechanism that refluxes, and due to liquid lubrication material and the infiltrating variation of moving element body material, very easily cause the creep of fluid lubricant to run off.J. W. Kannel, K. F. Dufrane. Rolling Element Bearings in Space. The 20th Aerospce Mechanism Symposi μ m, NASACP-2423,1986:112-321. and W. R. Jones, M. J. Jansen. Tribology for Space Applications. Engineering Tribology, 2008, the research of 222:997-1004 shows, for space fluid lubricant, temperature gradient is to cause one of key factor that its creep runs off, as shown in accompanying drawing 3,4.Small temperature gradient can impel lubricant oil film to move to low temperature area fast from high-temperature zone, causes creep to run off.Creep runs off and not only reduces the spatial component life-span in-orbit, and the oiling agent of accumulation all the year round even will pollute whole space station.
I. Takahashi, M. K μ me. A study on non-oil diffusive greases. NLGI Spokesman, 1993,57. 3. have introduced the cover coat in regions of lubrication coating with ultra-low surface energy, can have very significant inhibition to the creep of Lubricants.But because the adhesive strength of coating and matrix is not high, with regard to easily under the impact of various external influence power and come off, the cover coat coming off does not only hinder Lubricants creep, but also can pollution lubricating liquid, its greasy property affected.A. Fote, R. A. Slade, S. Feuerstein. The Prevention of Lubricant migration in spacecraft. Wear, 1978,51:67 ~ 75 are introduced a kind of by changing the method for friction surface structure, be seamed edge structure, and from theoretical validation its can reach sealing and suppress the effect of creep.In addition, E. W. Roberts, M. J. todd. Space and Vacu μ m Tribology. Wear, has mentioned in 1990,136:157 ~ 167 by improving the viscosity of oiling agent and has suppressed Lubricants and climb the effect that moves diffusion.
Summary of the invention
The present invention, in order to solve the problem of prior art, provides a kind of surface design method that space fluid lubricant creep runs off of controlling, and can obtain a kind of desirable surface structure that can effectively control the loss of space liquid lubrication liquid creep by the method.
Design method provided by the invention, first judges the temperature gradient direction on space mechanical moving components friction surface, if temperature gradient direction is single, on friction surface, processes the micro-cannelure array of regular distribution by micro machining process; If there are multiple temperature gradient directions, on friction surface, process micro-pit array of regular distribution by micro machining process; The degree of depth of pit or groove is 5 μ m-100 μ m, and area ratio is 0%-70%, and pit diameter or groove width are 10 μ m-500 μ m.
Further optimize, described groove array is 0 °-90 ° with respect to the angle of arranging of temperature gradient direction.
Further optimize, described groove array is 45 ° of parallel interlocking with respect to temperature gradient direction.
Further optimize, described groove array is 90 ° with respect to temperature gradient direction.
Described micro machining process comprises antiparticle etching, LIGA technology, laser beam machining, jet particle stream processing and photoetching and micro-electrochemical machining processing technique.
Beneficial effect of the present invention is: the friction surface of the space mechanical moving components of designing by the inventive method is to the creep of oiling agent good inhibitory action again, can effectively prevent that the creep that oiling agent produces because of temperature gradient runs off, and has extended the working life of parts.
Accompanying drawing explanation
Micro-cannelure array design diagram when Fig. 1 is single temperature gradient.
Fig. 2 is nick hole Array Design schematic diagram when there is multiple temperature gradient direction.
Fig. 3 is the micro-cannelure array design diagram that is parallel to temperature gradient direction.
Fig. 4 is 45 ° of parallel staggered micro-cannelure array design diagrams with respect to temperature gradient direction.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The present invention processes on the friction surface of space mechanical moving components by micro machining process, if temperature gradient direction is single, process the micro-cannelure array of regular distribution, as shown in Figure 1, temperature gradient is substantially horizontal, and groove direction is perpendicular to temperature gradient direction.If there are multiple temperature gradient directions, process micro-pit array of regular distribution, as shown in Figure 2; The degree of depth of pit or groove is 5 μ m-100 μ m, and area ratio is 0%-70%, and pit diameter or groove width are 10 μ m-500 μ m.Described micro machining process comprises antiparticle etching, LIGA technology, laser beam machining, jet particle stream processing and photoetching and micro-electrochemical machining processing technique.
Further optimize, described groove array is 0 °-90 ° with respect to the angle of arranging of temperature gradient direction, is parallel to the micro-cannelure array of temperature gradient direction as shown in Figure 3, is 45 ° of parallel staggered micro-cannelure arrays as shown in Figure 4 with respect to temperature gradient direction.In figure, style right-hand member is hot junction, and left end is cold junction, has an identical temperature gradient.Result shows, under identical test environment, for same Lubricants creep, on micro-groove, climb the speed of moving obviously faster than the speed of moving of climbing of the micro-groove of 45 degree true dip direction in the horizontal direction, 45 ° of micro-grooves of true dip direction are to the creep of oiling agent good inhibitory action again, thereby the existence that angle is described can suppress creep, can know better effects if in the time that 90 ° of groove and temperature gradients are vertical.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improve and also should be considered as protection scope of the present invention.
Claims (5)
1. control the surface design method that space fluid lubricant creep runs off for one kind, it is characterized in that: first judge the temperature gradient direction on space mechanical moving components friction surface, if temperature gradient direction is single, on friction surface, process the micro-cannelure array of regular distribution by micro machining process; If there are multiple temperature gradient directions, on friction surface, process micro-pit array of regular distribution by micro machining process; The degree of depth of pit or groove is 5 μ m-100 μ m, and area ratio is 0%-70%, and pit diameter or groove width are 10 μ m-500 μ m.
2. the surface design method that control according to claim 1 space fluid lubricant creep runs off, is characterized in that: described groove array is 0 °-90 ° with respect to the angle of arranging of temperature gradient direction.
3. the surface design method that control according to claim 2 space fluid lubricant creep runs off, is characterized in that: described groove array is 45 ° of parallel interlocking with respect to temperature gradient direction.
4. the surface design method that control according to claim 2 space fluid lubricant creep runs off, is characterized in that: described groove array is 90 ° with respect to temperature gradient direction.
5. the surface design method that control according to claim 1 space fluid lubricant creep runs off, is characterized in that: described micro machining process comprises antiparticle etching, LIGA technology, laser beam machining, jet particle stream processing and photoetching and micro-electrochemical machining processing technique.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163207A (en) * | 2018-08-10 | 2019-01-08 | 南京航空航天大学 | The Surface Texture design method for having controllable anti-creep ability |
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| JPH05172298A (en) * | 1991-12-26 | 1993-07-09 | Fuji Electric Co Ltd | Oil tank |
| CN101280803A (en) * | 2008-05-20 | 2008-10-08 | 南京航空航天大学 | Magnetic fluid lubricating method based on tiny magnetic body array |
| CN101799111A (en) * | 2010-03-26 | 2010-08-11 | 南京航空航天大学 | Magnetic liquid lubrication structure with controllable viscosity and method thereof |
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| JPH05172298A (en) * | 1991-12-26 | 1993-07-09 | Fuji Electric Co Ltd | Oil tank |
| CN101280803A (en) * | 2008-05-20 | 2008-10-08 | 南京航空航天大学 | Magnetic fluid lubricating method based on tiny magnetic body array |
| CN101799111A (en) * | 2010-03-26 | 2010-08-11 | 南京航空航天大学 | Magnetic liquid lubrication structure with controllable viscosity and method thereof |
Non-Patent Citations (3)
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| 于海武，袁思欢，孙造，王晓雷: "微凹坑形状对试件表面摩擦特性的影响", 《华南理工大学学报（自然科学版）》 * |
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| 戴庆文，黄巍，王晓雷: "液体空间润滑剂蠕爬流失机理及对策", 《中国科技论文在线》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109163207A (en) * | 2018-08-10 | 2019-01-08 | 南京航空航天大学 | The Surface Texture design method for having controllable anti-creep ability |
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Application publication date: 20140528 |