CN101699125A - MEMS micropump-based solid-liquid composite lubricated shafting for flywheel - Google Patents
MEMS micropump-based solid-liquid composite lubricated shafting for flywheel Download PDFInfo
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- CN101699125A CN101699125A CN200910217819A CN200910217819A CN101699125A CN 101699125 A CN101699125 A CN 101699125A CN 200910217819 A CN200910217819 A CN 200910217819A CN 200910217819 A CN200910217819 A CN 200910217819A CN 101699125 A CN101699125 A CN 101699125A
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Abstract
The invention belongs to the technical field of space tribology, and relates to an MEMS micropump-based solid-liquid composite lubricated shafting for a flywheel. The shafting comprises a first MEMS micropore reinforced solid film lubricated ceramic bearing, an MEMS micropump oil storage-oil supply system, a second micropore reinforced solid film lubricated ceramic bearing, a main shaft, an internal support sleeve, an external support sleeve and an oil reservoir. The shafting can provide effective support and lubrication for an internal rotor motor and an outer rotor motor, and utilizes a liquid composite lubrication mode that the MEMS micropore reinforced solid film lubricated ceramic bearings and an MEMS micropump supply oil accurately. A shafting lubricating system adopts an oil storage device, an oil supply device and a maintaining device which consist of a cavity oil reservoir, the MEMS micropump and a labyrinth seal to make the shafting have excellent lubrication properties and friction properties within the wide rotating speed range from static starting to high-speed operation, so that the initial running is improved effectively, the starting occlusion is prevented, and simultaneously, the control accuracy, service life and reliability of the shafting are improved at low speed.
Description
Technical field
The invention belongs to technical field of space tribology, relate to a kind of solid-liquid composite lubricated shafting for flywheel based on the MEMS Micropump.
Background technique
The demand for development attitude control system of satellite has highi degree of accuracy and long lifetime and accurate control moment can be provided, thereby adopts flywheel three-axis attitude stabilization system more and more.Appearance control flywheel in space generally is made of rotor, axle system, dc brushless motor and seal casinghousing.Axle system is the critical component in the flywheel, and its design has directly determined control accuracy, reliability and the life-span of flywheel.
Attitude control is divided into two kinds of bias momentum wheel and counteraction flybacks with flywheel, and wherein the bias momentum mean speed of taking turns is generally at 2000～3000 rev/mins, and the flywheel folk prescription is to rotation; The mean speed of counteraction flyback is 0, can positive and negative both direction rotation.With respect to the bias momentum wheel, counteraction flyback has high moment of momentum output area and good control characteristic under identical inertia condition, becomes the important development direction of attitude control flywheel.The development trend of at present external satellite attitude control scheme is counteraction flyback to be operated in to constitute bias state under put in order the star zero momentum, i.e. counteraction flyback zero passage not, and domestic counteraction flyback also is in the development stage, and life-span and reliability are not high.The counteraction flyback rotating speed is zero passage not, and its moment of momentum output area reduces more than 50%, causes its functional density seriously to reduce.Its reason is because near the fretting wear of counteraction flyback zero rotating speed acutely has strong nonlinear simultaneously, thereby cause near counteraction flyback control accuracy zero rotating speed low, its essence since flywheel shaft tie up to and have that wearing and tearing are violent, the problems such as non-linear and insufficient lubrication that rub cause near zero rotating speed.
Current, flywheel shaft is that spring bearing adopts the steel ball bearing, and lubricating system is that liquid oils is lubricated.Oil lubrication is difficult to form better elastic hydrldynamic pressure lubrication film under zero rotating speed and low speed, therefore the friction torque under zero rotating speed and the low speed is big, bearing wear is violent, it is low to have caused axle to tie up under zero rotating speed and the low speed control accuracy like this, satellite has been caused attitude disturbance, therefore, attitude control flywheel (comprising bias momentum wheel and counteraction flyback) only can be operated under the higher working speed.
The lubricating system of attitude control flywheel shaft system has grease lubrication, oil lubrication and three kinds of modes of solid lubrication.Wherein oil lubrication has friction torque low, turn round steady and the little advantage of power consumption under higher rotation speed, but its lubrication state under low speed is bad; Grease lubrication is not volatile, and the relative oil lubrication of lubricating structure is simple, and the lubrication state under the low speed is better than oil lubrication, but power consumption is bigger under higher rotation speed; That solid lubrication has is simple in structure, frictional behaviour does not vary with temperature and good advantages such as low-speed characteristic, but wearing and tearing are violent under higher rotation speed, and the life-span is limited.
Summary of the invention
Big near friction torque having zero-speed in the current flywheel, problems such as the violent and control accuracy of wearing and tearing is low, the invention provides a kind of space flywheel based on the MEMS Micropump with the composite lubricated axle of solid-liquid is, can be simultaneously provide effective support for internal rotor fly-wheel motor and external rotor fly-wheel motor, the composite lubricated mode of liquid by the lubricated ceramic bearing of the solid film that utilizes the MEMS micropore to strengthen+accurate fuel feeding of MEMS Micropump, axle is that lubrication system adopts the oil storage by the cavity oil conservator-MEMS Micropump-labyrinth seal is formed, fuel feeding and holding device, make axle system all have good lubrication property and frictional behavior in the wide speed range that runs up from static starting to, effective improvement initial stage break-in and prevent to start interlock has improved axle simultaneously and has tied up near the zero-speed control accuracy, working life and reliability.
The present invention includes the lubricated ceramic bearing 1 of solid film that a MEMS micropore strengthens, the lubricated ceramic bearing 3 of solid film, MEMS Micropump oil storage-oil supply system 2, main shaft 4, interior supporting sleeve 5, outer supporting sleeve 6 and the oil storage 7 that the 2nd MEMS micropore strengthens.Interior supporting sleeve 5 and outer supporting sleeve 6 all can connect with the fly-wheel motor rotor, can be simultaneously provide secure support for internal rotor fly-wheel motor and external rotor fly-wheel motor; Lubricated ceramic bearing 3 arranged in co-axial alignment of solid film that lubricated ceramic bearing 1 of the solid film that the one MEMS micropore strengthens and the 2nd MEMS micropore strengthen are installed on the main shaft 4, two ends are realized fastening by interior supporting sleeve 5,6 pairs of bearings of outer supporting sleeve provide pretension, adopt labyrinth seal structure to reduce the molecule loss of fluid lubricant between interior supporting sleeve 5 and the outer supporting sleeve 6; The inner ring 17 and outer ring 18 channel surface of the lubricated ceramic bearing 3 of solid film that lubricated ceramic bearing 1 of the solid film that the one MEMS micropore strengthens and the 2nd MEMS micropore strengthen adopted the MEMS micro fabrication at the prefabricated micropore of its channel surface before the coating solid composite lubricating film, strengthen the combination force of solid lubricant film and base steel, provide good lubricated near the zero-speed for axle ties up to, increase the working life of axle system simultaneously.MEMS Micropump oil storage-oil supply system 2 is installed in the lubricated ceramic bearing 1 of solid film of MEMS micropore enhancing and the solid film of the 2nd MEMS micropore enhancing lubricates between the ceramic bearing 3, according to rotor type (internal rotor, external rotor) determines its means of fixation, wherein MEMS wedge shape filler opening 9 and little valve 11 can carry out accurately controlled fuel feeding to the lubricated ceramic bearing 3 of solid film of lubricated ceramic bearing 1 of the solid film that a MEMS micropore strengthens and the enhancing of the 2nd MEMS micropore, thereby eliminating bearing descends because of the greasy property that overfueling and oil starvation cause, improve the utilization ratio of the lubricant oil that stores up in the oil storage 7, increase working life.
The invention has the beneficial effects as follows: the composite lubricated mode of liquid of the lubricated ceramic bearing of the solid film that adopts the MEMS micropore to strengthen+accurate fuel feeding of MEMS Micropump, axle is that lubrication system adopts oil storage, fuel feeding and the holding device by the cavity oil conservator-MEMS Micropump-labyrinth seal is formed, make axle system have good lubrication property and frictional behavior in the wide speed range that runs up from static starting to, effective improvement initial stage break-in and prevent to start interlock has improved axle simultaneously and has tied up to control accuracy, working life and reliability under the low speed.
Description of drawings
Fig. 1 is the structural representation that the present invention is based on the solid-liquid composite lubricated shafting for flywheel of MEMS Micropump.
Fig. 2 is MEMS Micropump oil storage of the present invention-oil supply system schematic representation.Wherein, the little valve closed condition of figure (a) expression, the little valve of figure (b) expression is opened the fuel feeding state.
Fig. 3 is the structural representation of the lubricated ceramic bearing of solid film of lubricated ceramic bearing of the solid film of MEMS micropore enhancing of the present invention or the enhancing of the 2nd MEMS micropore.
Among the figure: 1, the lubricated ceramic bearing of solid film that strengthens of a MEMS micropore, 2, MEMS Micropump oil storage-oil supply system, the lubricated ceramic bearing of the solid film that the 3, the 2nd MEMS micropore strengthens, 4, main shaft, 5, interior supporting sleeve, 6, outer supporting sleeve, 7, oil storage, 8, oil conservator, 9, the little filler opening of wedge shape, 10, valve pocket, 11, little valve, 12, the little oil outlet of wedge shape, 13, outer ring, 14, ceramic balls, 15, the selflubricating retainer, 16, inner ring, 17, bear inner ring grooved railway, 18, outer ring raceway.
Embodiment
As shown in Figure 1, axle is that the inner ring of the lubricated ceramic bearing 3 of solid film of lubricated ceramic bearing 1 of the solid film of critical support parts the one MEMS micropore enhancing and the enhancing of the 2nd MEMS micropore tightly is loaded on shaft shoulder place respectively, two ends are fixed by interior supporting sleeve 5, and 6 pairs of bearings of outer supporting sleeve carry out pretension; Be applied to the internal rotor fly-wheel motor, rotor is connected on the interior supporting sleeve 5; Be applied to the external rotor fly-wheel motor, rotor is connected on the outer supporting sleeve 6.The little filler opening 9 of wedge shape and little valve 11 that MEMS Micropump oil storage-oil supply system 2 is made by MEMS technology by the centrifugal force in when work can accurately be controlled fuel delivery and delivery rate, adopt cavity oil conservator 8 can improve the lubricant oil utilization ratio simultaneously, increasing axle is lubricating life.
As shown in Figure 2, MEMS Micropump oil storage-oil supply system 2 for axle system, according to the driving mode of fly-wheel motor determine its be fixed in that outer supporting sleeve 6 (corresponding external rotor fly-wheel motor) is gone up or interior supporting sleeve 5 (corresponding internal rotor fly-wheel motor) on, wherein, little valve 11 adopts the MEMS micro fabrication to make, when needing fuel feeding, the centrifugal force that increases the oil storage is opened little valve 11, lubricant oil is entered in the valve pocket 10 by oil storage 7 by the little filler opening 9 of wedge shape, enter bearing channel 17 by the little oil outlet 12 of wedge shape again, thereby provide lubricated for bearing; When not needing fuel feeding, reduce the centrifugal force of oil storage, little valve 11 cuts out, and finishes fuel feeding.The accurate control of delivery rate and fuel delivery is determined according to the design parameter and the oil storage centrifugal force of the little filler opening 9 of wedge shape, little valve 11, valve pocket 10, the little oil outlet 12 of wedge shape.
As shown in Figure 3, for axle is that the solid film that critical support parts the one MEMS micropore strengthens lubricates the lubricated ceramic bearing 3 of solid film of ceramic bearing 1 and the enhancing of the 2nd MEMS micropore, the inner ring 13 of bearing and outer ring 16 are Bearing Steel, before the coating solid lubricating film to steel bear inner ring grooved railway 17 and outer ring raceway 18 adopt the MEMS micro-processing technologies on the surface prefabricated micropore, the shape of cross section of micropore is circular, square or rectangle, its degree of depth is 10 microns to 1 millimeter, form solid lubricating film at channel surface coating solid oiling agent again, solid lubricant enters the MEMS micropore, increase the area of contact and the adhesive strength of rete and matrix, thus the scurf resistance and the working life of having improved film.Retainer 15 adopts the macromolecule composite porous material with self-lubricating property to make.
Claims (6)
1. based on the solid-liquid composite lubricated shafting for flywheel of MEMS Micropump, it is characterized in that this system comprises that the lubricated ceramic bearing (3) of solid film, main shaft (4), interior supporting sleeve (5), outer supporting sleeve (6) and oil that the lubricated ceramic bearing (1) of the solid film of MEMS micropore enhancing, MEMS Micropump oil storage-oil supply system (2), MEMS micropore strengthen store up (7); Lubricated ceramic bearing (3) arranged in co-axial alignment of solid film that lubricated ceramic bearing (1) of the solid film that the one MEMS micropore strengthens and MEMS micropore strengthen is installed on the main shaft (4), two ends are realized fastening by interior supporting sleeve (5), realize pretension by outer supporting sleeve (6); The bear inner ring grooved railway (17) and the outer ring raceway (18) of the lubricated ceramic bearing (1) of the solid film that the one MEMS micropore strengthens, and the bear inner ring grooved railway (17) and the outer ring raceway (18) of the lubricated ceramic bearing (3) of solid film of MEMS micropore enhancing, its each channel surface all adopted MEMS technology at the prefabricated micropore of channel surface before the coating solid composite lubricating film; MEMS Micropump oil storage-oil supply system (2) is installed in the lubricated ceramic bearing (1) of solid film of MEMS micropore enhancing and the solid film of MEMS micropore enhancing lubricates between the ceramic bearing (3), and its means of fixation is determined by the type of fly-wheel motor rotor; Oil storage (7) is connected with the little filler opening of wedge shape (9) of MEMS Micropump oil storage-oil supply system (2).
2. the solid-liquid composite lubricated shafting for flywheel based on the MEMS Micropump according to claim 1 is characterized in that, when the rotor of fly-wheel motor was external rotor, described MEMS Micropump oil storage-oil supply system (2) was fixed on the outer supporting sleeve (6); When the rotor of fly-wheel motor was internal rotor, described MEMS Micropump oil storage-oil supply system (2) was fixed on the interior supporting sleeve (5).
3. the solid-liquid composite lubricated shafting for flywheel based on the MEMS Micropump according to claim 1, it is characterized in that the lubricated ceramic bearing (3) of solid film that lubricated ceramic bearing (1) of solid film that strengthens by a described MEMS micropore and MEMS micropore strengthen provides lubricated fluid lubricant to store up (7) by cavity oil and supplied with.
4. the solid-liquid composite lubricated shafting for flywheel based on the MEMS Micropump according to claim 1, it is characterized in that, lubricant oil in the oil storage (7) is accurately offered the MEMS Micropump oil storage-oil supply system (2) of mechanism for adopting the MEMS micro fabrication to make of bearing.
5. according to claim 1 or 2 or 4 described solid-liquid composite lubricated shafting for flywheel based on the MEMS Micropump, it is characterized in that, the filler opening (9) of described MEMS Micropump oil storage-oil supply system (2) and oil outlet (12), its shape all adopts the wedge shape micropore, and the surface scribbles the polymeric coating layer that increases the fluid lubricant viscous resistance.
6. the solid-liquid composite lubricated shafting for flywheel based on the MEMS Micropump according to claim 1, it is characterized in that, the shape of cross section of described bear inner ring grooved railway (17) and outer ring raceway (18) surface micropore is circular, square or rectangle, and its degree of depth is 10 microns to 1 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102178192A CN101699125B (en) | 2009-11-05 | 2009-11-05 | MEMS micropump-based solid-liquid composite lubricated shafting for flywheel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102178192A CN101699125B (en) | 2009-11-05 | 2009-11-05 | MEMS micropump-based solid-liquid composite lubricated shafting for flywheel |
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| CN101699125A true CN101699125A (en) | 2010-04-28 |
| CN101699125B CN101699125B (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102178192A Expired - Fee Related CN101699125B (en) | 2009-11-05 | 2009-11-05 | MEMS micropump-based solid-liquid composite lubricated shafting for flywheel |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312926A (en) * | 2011-03-11 | 2012-01-11 | 许晓华 | Straight-axis bearing positioning structure |
| CN103023198A (en) * | 2011-09-27 | 2013-04-03 | 上海航天控制工程研究所 | Microminiature-type integrated flywheel structure |
| CN104037975A (en) * | 2014-07-01 | 2014-09-10 | 成都浩生钢铁有限公司 | Low-loss flywheel energy storage device |
| CN109372893A (en) * | 2018-12-17 | 2019-02-22 | 上海航天控制技术研究所 | A kind of low speed motor-driven shafting device fastly |
| CN110206993A (en) * | 2019-05-28 | 2019-09-06 | 哈尔滨工业大学 | A kind of micro- redundancy lubricating structure of bearing active based on Valveless Piezoelectric Micropump |
| CN111075845A (en) * | 2020-01-08 | 2020-04-28 | 上海航天控制技术研究所 | Active supplementary oil supply unit |
| CN114370456A (en) * | 2021-12-13 | 2022-04-19 | 上海航天控制技术研究所 | Microporous supplementary lubrication device for bearing with long space life |
-
2009
- 2009-11-05 CN CN2009102178192A patent/CN101699125B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312926A (en) * | 2011-03-11 | 2012-01-11 | 许晓华 | Straight-axis bearing positioning structure |
| CN103023198A (en) * | 2011-09-27 | 2013-04-03 | 上海航天控制工程研究所 | Microminiature-type integrated flywheel structure |
| CN104037975A (en) * | 2014-07-01 | 2014-09-10 | 成都浩生钢铁有限公司 | Low-loss flywheel energy storage device |
| CN109372893A (en) * | 2018-12-17 | 2019-02-22 | 上海航天控制技术研究所 | A kind of low speed motor-driven shafting device fastly |
| CN110206993A (en) * | 2019-05-28 | 2019-09-06 | 哈尔滨工业大学 | A kind of micro- redundancy lubricating structure of bearing active based on Valveless Piezoelectric Micropump |
| CN111075845A (en) * | 2020-01-08 | 2020-04-28 | 上海航天控制技术研究所 | Active supplementary oil supply unit |
| CN111075845B (en) * | 2020-01-08 | 2021-11-05 | 上海航天控制技术研究所 | Active supplementary oil supply unit |
| CN114370456A (en) * | 2021-12-13 | 2022-04-19 | 上海航天控制技术研究所 | Microporous supplementary lubrication device for bearing with long space life |
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| CN101699125B (en) | 2011-05-18 |
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Granted publication date: 20110518 Termination date: 20121105 |