CN115013437A - Long-life ultralow-friction solid lubrication sliding bearing assembly for spacecraft - Google Patents
Long-life ultralow-friction solid lubrication sliding bearing assembly for spacecraft Download PDFInfo
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- CN115013437A CN115013437A CN202210746568.2A CN202210746568A CN115013437A CN 115013437 A CN115013437 A CN 115013437A CN 202210746568 A CN202210746568 A CN 202210746568A CN 115013437 A CN115013437 A CN 115013437A
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- lubrication
- lubricating
- working surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1095—Construction relative to lubrication with solids as lubricant, e.g. dry coatings, powder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a long-life ultra-low friction solid lubrication sliding bearing for a spacecraft, and a bearing assembly according to the invention comprises: the bearing comprises a bearing seat and a bearing bush, wherein the periphery of an inner ring of the bearing seat is provided with a first working surface, and an outer ring of the bearing bush is provided with a second working surface; wherein one of the first working surface and the second working surface is provided with a plurality of lubricating portion accommodating grooves which are configured to be arranged on the inner surface of the working surface in an array manner, and the depths of two adjacent lubricating portion accommodating grooves are different; each lubricating part accommodating groove can accommodate solid lubricants for spaces such as nano onion carbon, molybdenum sulfide, nano diamond particles and the like. The bearing assembly provided by the invention has the advantages of low friction coefficient, good wear resistance and long service life.
Description
Technical Field
The invention relates to the technical field of bearings for spacecrafts, in particular to a long-life ultralow-friction solid lubrication sliding bearing assembly for spacecrafts.
Background
With the rapid promotion of important space missions such as deep space exploration, space station construction and the like, the spacecraft motion pair is developed to the forward relative motion at high speed. Space environments in which spacecrafts such as satellites and space stations are located include microgravity, high vacuum and the like. Microgravity causes friction to be one of the most major sources of resistance that a spatial mechanical component needs to overcome for high-level motion; the high vacuum not only greatly increases the intermetallic coefficient of friction, but also makes it difficult to use fluid lubrication effectively. In particular, the limited energy supply of spacecraft (which in most cases relies on solar energy for power generation) requires the development of mechanical components with low friction (low energy consumption). Therefore, aerospace equipment needs to develop a new friction structure element to realize resistance reduction and life prolongation of parts.
The super-lubrication technology (the friction reduction technology with the friction coefficient lower than 0.01) provides a possible technical path, particularly provides an ideal place with nearly clean contact for realizing super-lubrication in a space high-vacuum environment, and is favorable for realizing large-scale long-acting super-lubrication. The conditions for the prior tribology leading edge research structure macroscopic super lubrication mainly comprise: the relatively clean and smooth counter-wear surface, and the friction partner, allows for the continuous replenishment of nanoparticles acting as molecular bearings. Therefore, the key to optimally designing and manufacturing the long-life ultra-low friction sliding bearing suitable for the space environment lies in the optimization of the interface structure design and the lubricating condition of the contact surface of the bearing seat and the bearing bush.
Disclosure of Invention
The invention aims at least solving the problem of sliding of the existing spacecraftBearing solid lubricationTechnical problems exist in the technology.
Therefore, the invention aims to provide a bearing assembly which has the advantages of good wear resistance, long service life and low friction coefficient. The bearing assembly according to the invention comprises: the bearing comprises a bearing seat and a bearing bush, wherein the inner ring of the bearing seat is set as a first working surface, and the inner periphery of the outer ring of the bearing bush is set as a second working surface; wherein one of the first working surface and the second working surface is provided with a plurality of lubricating part accommodating grooves which are arranged on the inner surface of the working surface in an array manner, and the depths of two adjacent lubricating part accommodating grooves are different; and solid lubricants such as nano onion carbon, molybdenum sulfide, nano diamond particles and the like are arranged in each lubricating part accommodating groove. The nano onion carbon is a nano diamond particle coated with graphene, and can be obtained by performing high-temperature treatment on diamond powder for a period of time. The nano-scale small powder can generate relative rolling in the face-to-face contact opposite grinding, and the relative sliding of the original inner ring and the outer ring is changed into rolling friction.
The application has the advantages that: the solid lubricant (nano onion carbon, nano molybdenum sulfide and graphene) stored in the hole can slowly move between the inner ring and the outer ring by the relative movement and the pressure, so that the lubricating effect is achieved. The working table is provided with holes with different depths, so that the nano onion carbon can be correspondingly lubricated under different pressures.
According to the bearing assembly, the lubricating part accommodating grooves are arranged in an array mode, and the nano onion carbon is arranged in each lubricating part accommodating groove, so that the bearing assembly has lower friction and abrasion in different humidity environments, and the two adjacent lubricating part accommodating grooves are further arranged to be different in depth, so that the bearing assembly can be suitable for different load speeds and has comprehensive performance under different working conditions.
According to an embodiment of the present invention, the plurality of lubricating-portion housing grooves are structured in a plurality of groups, each group of the lubricating-portion housing grooves is structured as a lubricating unit, the plurality of lubricating-portion housing grooves in each lubricating unit are arranged in order in the axial direction, and the plurality of lubricating-portion housing grooves in each lubricating unit are different in volume.
According to one embodiment of the present invention, the lubrication-part-receiving grooves in each of the lubrication units are arranged in order in the axial direction, and the depth of the lubrication-part-receiving grooves gradually increases in the axial direction.
According to one embodiment of the present invention, the lubrication-part-receiving grooves in each of the lubrication units are arranged in order in the axial direction and the maximum diameter of the lubrication-part-receiving grooves gradually increases in the axial direction.
According to one embodiment of the invention, the lubricating unit is plural and arranged at intervals in the circumferential direction of the first working surface or the second working surface.
According to an embodiment of the present invention, each of the lubricating units has therein a first lubricating-section accommodating groove, a second lubricating-section accommodating groove, and a third lubricating-section accommodating groove; wherein the area of the first working surface is S, the sum of the sectional areas of the plurality of first lubrication section accommodating grooves in the first working surface is S1, the sum of the sectional areas of the plurality of second lubrication section accommodating grooves in the first working surface is S2, and the sum of the sectional areas of the plurality of third lubrication section accommodating grooves in the first working surface is S3, and S S, S1, S2, and S3 satisfy: 0.1 is less than or equal to (S1+ S2+ S3)/S is less than or equal to 0.3.
According to an embodiment of the present invention, a cross-section of any one of the first lubricating-portion housing groove, the second lubricating-portion housing groove, and the third lubricating-portion housing groove is configured to be any one of a rectangle, a semicircle, a triangle, a circle, an inverted trapezoid, and a rhombus.
According to an embodiment of the present invention, the first sliding surface and the second sliding surface are plated with a hard solid lubricating film.
According to an embodiment of the present invention, the solid lubricating film is configured as at least one of an amorphous carbon thin film, a tetrahedral amorphous carbon thin film, a hydrogen-containing amorphous carbon thin film, a metal-doped amorphous carbon thin film, a tetrahedral hydrogen-containing amorphous carbon thin film.
According to one embodiment of the invention, the lubricating material adopted by the lubricating material is one or more of nano onion carbon, molybdenum sulfide and nano diamond particles, the vacuum degree is more than 1 x 10 < -5 > Pa, and the friction coefficient is lower than 0.01.
According to an embodiment of the present invention, each of the lubricant-receiving grooves has a depth of H1, the solid lubricant for spaces such as nano onion carbon, molybdenum sulfide, nano diamond particles has a height of H2, and H1 and H2 satisfy: H1/H2 is more than or equal to 0.4 and less than or equal to 0.8.
According to one embodiment of the invention, the particle size of the space solid lubricant such as nano onion carbon, molybdenum sulfide, nano diamond particles and the like is not more than 50 nm.
The bearing assembly has the advantages of low friction coefficient, good wear resistance and long service life. Additional advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a bearing outer race in a bearing assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a bearing inner race in a bearing assembly according to an embodiment of the present invention.
Reference numerals:
a bearing outer ring 1, a second working surface 100, a first lubrication section accommodating groove 101, a second lubrication section accommodating groove 102, a third lubrication section accommodating groove 103, and a lubrication unit 104;
bearing inner race 2, lubricating film 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
A bearing assembly according to the invention is described below with reference to figures 1-2.
The bearing assembly comprises a bearing inner ring 2 and a bearing outer ring 1, wherein the outer periphery of the bearing inner ring 2 is provided with a first working surface, the inner periphery of the bearing outer ring 1 is provided with a second working surface 100, one of the first working surface and the second working surface 100 is provided with a lubricating part accommodating groove, the lubricating part accommodating groove is a groove which is concave inwards to the first working surface or the second working surface 100, and each lubricating part accommodating groove is internally provided with nano onion carbon for lubricating the bearing assembly.
It should be noted that: the bearing is a thrust bearing, and the structure of the thrust bearing is an outer ring and an inner ring, the thrust bearing can enable the inner ring to move relative to the outer ring (can reciprocate along the axial direction or can rotate relative to the inner ring), a ball body is not arranged in the middle (the added onion carbon can be regarded as a molecular bearing (small carbon nanosphere)), and the inner ring and the outer ring are in surface-to-surface contact and are not in spherical surface contact.
In the related art, after the existing transmission shaft bearing works for a period of time, serious abrasion easily occurs on a working surface, after the working surface of the bearing is abraded, the fit clearance of the bearing is uneven, the precision is reduced, the mechanical performance is weakened, the service life is short, and the working requirement cannot be met.
The inner ring and the outer ring are lubricated by lubricant or lubricating material arranged on the working surface to reduce the abrasion, but the bearing assembly is suitable for different loads, and the requirements of the bearing on different loads and complex working conditions cannot be met only by adopting single-form lubrication.
According to the bearing assembly, the lubricating part accommodating groove is formed in at least one of the first working surface and the second working surface, the nano onion carbon is arranged in the lubricating part accommodating groove, the abrasion between the first bearing inner ring 2 and the bearing outer ring 1 is reduced by utilizing the lubricating capacity of the nano onion carbon, the particle size of the nano onion carbon is about 20nm, the lubricating capacity of the bearing assembly can be effectively improved by adopting the solid lubricant, the service life and the mechanical property of the bearing are prolonged, and the mechanical precision of the bearing assembly is ensured.
In addition, lubricated portion holding tank is the array and arranges on first working face or second working face 100, is the array through setting up lubricated portion holding tank and arranges for nanometer onion carbon can evenly be arranged on first working face and second working face, has improved the lubricated degree of consistency of nanometer onion carbon to the bearing assembly.
Furthermore, the depth of each lubricating part accommodating groove is different, and through the lubricating part accommodating grooves with different depths, nano onion carbon with corresponding volumes is accommodated in the lubricating part accommodating grooves with different depths, and under the load working conditions that the bearing inner ring 2 and the bearing outer ring 1 are different, the first working surface and the second working surface 100 can be lubricated to a corresponding degree, so that the bearing assembly can be suitable for different loads, and the working application range of the bearing assembly is greatly improved.
According to the bearing assembly, the lubricating part accommodating grooves are arranged in an array mode, and the nano onion carbon is arranged in each lubricating part accommodating groove, so that the bearing assembly has a lower friction coefficient in different humidity environments, abrasion is reduced, and the two adjacent lubricating part accommodating grooves are further arranged to be different in depth, so that the bearing assembly can be suitable for different load speeds and has more excellent comprehensive performance under different working conditions.
According to an embodiment of the present invention, the plurality of accommodating grooves are divided into a plurality of groups, each group of the lubricating portion accommodating grooves is configured as a lubricating unit 104, the plurality of lubricating portion accommodating grooves in each lubricating unit 104 are arranged in order in the axial direction, and the volumes of the lubricating portion accommodating grooves in each lubricating unit 104 are different.
Divide into the multiunit with a plurality of lubrication grooves in order to form a plurality of lubrication unit 104, be provided with the different lubrication portion holding tank of a plurality of volumes in every lubrication unit 104, be provided with corresponding nanometer onion carbon in every lubrication portion holding tank to make a lubrication unit 104 can deal with different loads. Specifically, be provided with the lubricated portion holding tank of three kinds of different volumes in a lubricated unit 104, to low load operating mode under, the nanometer onion carbon in the less lubricated portion holding tank of volume can deviate from more easily and play main lubrication action, and when to well load and high load, all have the nanometer onion carbon in the corresponding degree of depth and deviate from corresponding lubricated portion holding tank in order to lubricate it to realized the lubricated effect of bearing assembly under to different load operating modes, improved the comprehensive ability of bearing assembly.
According to an embodiment of the invention, the lubrication part accommodating grooves in each lubrication unit 104 are sequentially arranged in the axial direction, and the depth of the lubrication part accommodating grooves is gradually increased in the axial direction, because the whole bearing is not always in a stable working condition, the bearing surface of the bearing is elastically deformed by non-uniformly distributed force, the bearing capacity of the sliding bearing is enhanced by the shallow lubrication part accommodating grooves in the lubrication part accommodating grooves which are reasonably arranged, the transmission noise can be reduced by the lubrication part accommodating grooves with deeper depth, the added nano onion carbon can enable the bearing to be fully lubricated and is suitable for various humidity environments, so that the comprehensive performance of the bearing assembly is improved, compared with a smooth bearing and a bearing with a single tissue structure, the bearing assembly has better antifriction and wear-resistant effects, is suitable for various load speed working conditions and is suitable for various humidity environments, the comprehensive performance is obviously improved.
According to an embodiment of the present invention, the lubrication-part-receiving grooves in each of the lubrication units 104 are arranged in order in the axial direction and the maximum diameter of the lubrication-part-receiving grooves gradually increases in the axial direction. It is understood that the maximum diameter and the corresponding depth and volume of the plurality of lubrication-section-accommodating grooves, which are arranged in this order in the axial direction, are increased in this order.
In one embodiment of the invention, each lubricating unit 104 has three lubricating portion receiving grooves, including a first lubricating portion receiving groove 101, a second lubricating portion receiving groove 102 and a third lubricating portion receiving groove 103, the first lubricating portion receiving groove 101 having a maximum axial dimension of 0.05-0.1 mm and a maximum radial dimension of 0.5-1 mm. The second lubrication receiving groove 102 has a maximum axial dimension of 0.1-0.5 micron and a maximum radial dimension of 0.2-0.5 mm. The third lubrication-section accommodating groove 103 has a maximum axial dimension of 0.5 to 1 mm and a maximum radial dimension of 0.01 to 0.2 mm in depth.
Further, in the bearing assembly according to the present invention, the lubrication unit 104 is plural and is arranged at intervals in the circumferential direction of the first working surface or the second working surface 100. The arrangement order of the plurality of lubrication section accommodating grooves in two adjacent lubrication units 104 is identical.
According to one embodiment of the present invention, each lubricating unit 104 has therein a first lubricating-part receiving groove 101, a second lubricating-part receiving groove 102, a third lubricating-part receiving groove 103; wherein the area of the first working surface is S, the sum of the sectional areas of the plurality of first lubricating-section accommodating grooves 101 located in the first working surface is S1, the sum of the sectional areas of the plurality of second lubricating-section accommodating grooves 102 located in the first working surface is S2, the sum of the sectional areas of the plurality of third lubricating-section accommodating grooves 103 located in the first working surface is S3, and S, S1, S2, and S3 satisfy: 0.1 is less than or equal to (S1+ S2+ S3)/S is less than or equal to 0.3.
According to an embodiment of the present invention, a cross section of any one of the first lubricating-portion receiving groove 101, the second lubricating-portion receiving groove 102, and the third lubricating-portion receiving groove 103 is configured to be any one of a rectangle, a semicircle, a triangle, a circle, an inverted trapezoid, and a rhombus.
According to an embodiment of the present invention, a lubrication film 200 is formed on at least one of the first sliding surface and the second sliding surface.
According to one embodiment of the present invention, the lubricating film 200 is configured as at least one of an amorphous carbon thin film, a tetrahedral amorphous carbon thin film, a hydrogen-containing amorphous carbon thin film, a metal-doped amorphous carbon thin film, a tetrahedral hydrogen-containing amorphous carbon thin film.
According to an embodiment of the present invention, each of the lubricant receiving grooves has a depth of D1, the nano onion carbon has a height of D2, and D1 and D2 satisfy: D1/D2 is more than or equal to 0.4 and less than or equal to 0.8.
A brief description of one embodiment according to the invention follows.
As shown in fig. 1 and 2, fig. 1 is a schematic view of a bearing outer ring 1 in a bearing assembly, and fig. 2 is a schematic view of a contour of a bearing inner ring 2 in the bearing assembly. Bearing inner race 1 second working face 100 is last including three lubricated units 104 of group, is provided with first lubricated portion holding tank 101 in every lubricated unit 104 of group, second lubricated portion holding tank 102 and third lubricated portion holding tank 103, first lubricated portion holding tank 101, second lubricated portion holding tank 102 and third lubricated portion holding tank 103 and evenly arranges on first working face or second working face 100.
The total area of the plurality of lubrication receiving grooves in the first or second working surface 100 accounts for 10% to 30% of the corresponding working surface.
In each lubricating unit 104, the first lubricating-section accommodating groove 101 has a maximum depth dimension of 0.05 to 0.1 mm and a maximum radial dimension of 0.5 to 1 mm. Each second lubrication receiving groove 102 has a maximum depth dimension of 0.1-0.5 micron and a maximum radial dimension of 0.2-0.5 mm. Each of the third lubrication-section-accommodating grooves 103 has a maximum depth dimension of 0.5 to 1 mm and a maximum radial dimension of 0.01 to 0.2 mm.
The first lubricating-portion accommodating groove 101, the second lubricating-portion accommodating groove 102 and the third lubricating-portion accommodating groove 103 in each lubricating-portion accommodating groove group are all linearly arranged in the axial direction and in the circumferential direction in this order with their center points. And the first lubricating-portion accommodating groove 101 and the second lubricating-portion accommodating groove 102, and the second lubricating-portion accommodating groove 102 and the third lubricating-portion accommodating groove 103 are arranged at equal intervals. The spacing between the first, second and third lubrication receiving grooves 101, 102, 103 is in the range of 0.01-1 mm.
The first, second, and third lubricating- portion accommodating grooves 101, 102, and 103 have any one of a rectangular, semicircular, triangular, circular, inverted trapezoidal, and rhombic cross section.
First lubricated portion holding tank 101 has the characteristics that the little degree of depth of diameter is big, is applicable to low-speed heavy load operating mode and plays the effect of making an uproar damping of falling. The second lubrication part accommodating groove 102 has the characteristic of moderate diameter and moderate depth, and is suitable for the working condition of medium speed and medium and high load for the working condition suddenly changing and stabilizing the working state in a transition short time. The third lubrication portion accommodating groove 103 has the characteristic of large diameter and shallow depth, and is suitable for enabling the bearing to be more easily in a good lubrication state under the high-speed low-load working condition.
Each lubricating part accommodating groove is internally provided with nano onion carbon with half depth of the lubricating part accommodating groove, and the particle diameter is 50-100 nm. Mixing onion carbon with distilled water to obtain paste, adding into the lubricating part holding tank, and drying.
As shown in fig. 2, the first working surface of the bearing inner ring 2 is coated with a diamond-like carbon film by using one of physical vapor deposition, chemical vapor deposition and liquid phase deposition techniques. The film thickness is 1-10 microns, the film type is one of an amorphous carbon film, a tetrahedral amorphous carbon film, a hydrogen-containing amorphous carbon film, a metal-doped amorphous carbon film and a tetrahedral hydrogen-containing amorphous carbon film, and the film type is optimized according to the actual working condition. The substrate is a bearing inner ring 2, the surface roughness is controlled to be more than 2 microns by an electric spark cutting technology and a low acid corrosion surface treatment technology, and the wear resistance of the diamond-like carbon film is ensured.
As shown in figure 2, the working surface of the bearing inner ring 2 is controlled in roughness by controlling the number of electric spark cutting times to be 1-20 times and then treating the surface by a low-acid corrosion technology. The low-acid solution is prepared by mixing acetic acid, ethanol and water in a ratio, the concentration ratio is respectively controlled to be 1-10%, 20-50% and 20-50%, and the treatment time is controlled to be more than 3 hours according to the requirements of concentration and roughness.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A long life ultra low friction solid lubricated plain bearing assembly for a spacecraft comprising:
the outer circumference of the bearing inner ring is provided with a first working surface, and the inner circumference of the bearing outer ring is provided with a second working surface; wherein the content of the first and second substances,
one of the first working surface and the second working surface is provided with a plurality of lubricating part accommodating grooves which are arranged on the inner surface of the working surface in an array manner, and the depths of two adjacent lubricating part accommodating grooves are different;
and nano onion carbon is arranged in each lubricating part accommodating groove.
2. The bearing assembly according to claim 1, wherein the plurality of lubricating-portion receiving grooves are divided into a plurality of groups, each group of the lubricating-portion receiving grooves is configured as a lubricating unit, the plurality of lubricating-portion receiving grooves in each lubricating unit are arranged in order in the axial direction, and the plurality of lubricating-portion receiving grooves in each lubricating unit are different in volume.
3. The bearing assembly of claim 2, wherein the lubrication-receiving grooves in each of the lubrication units are arranged in sequence in the axial direction and the depth of the lubrication-receiving grooves gradually increases in the axial direction; the lubrication part accommodating grooves in each lubrication unit are sequentially arranged in the axial direction and the maximum diameter of the lubrication part accommodating grooves gradually increases in the axial direction; the lubricating units are multiple and are arranged at intervals in the circumferential direction of the first working surface or the second working surface.
4. The bearing assembly of claim 3, wherein each of the lubrication units has a first lubrication-part-receiving groove, a second lubrication-part-receiving groove, and a third lubrication-part-receiving groove therein; wherein
The area of the first working surface is S, the sum of the sectional areas of the plurality of first lubrication-section-accommodating grooves in the first working surface is S1, the sum of the sectional areas of the plurality of second lubrication-section-accommodating grooves in the first working surface is S2, and the sum of the sectional areas of the plurality of third lubrication-section-accommodating grooves in the first working surface is S3, and S S, S1, S2, and S3 satisfy: 0.1 is less than or equal to (S1+ S2+ S3)/S is less than or equal to 0.3.
5. The bearing assembly of claim 4, wherein a cross-section of any one of the first lubrication receiving groove, the second lubrication receiving groove, and the third lubrication receiving groove is configured as any one of a rectangle, a semicircle, a triangle, a circle, an inverted trapezoid, and a diamond.
6. The bearing assembly of claim 1, wherein the first working surface and the second working surface are plated with a hard solid lubricant film.
7. The bearing assembly of claim 6, wherein the solid lubricant film is configured as at least one of an amorphous carbon film, a tetrahedral amorphous carbon film, a hydrogen-containing amorphous carbon film, a metal-doped amorphous carbon film, a tetrahedral hydrogen-containing amorphous carbon film.
8. Bearing assembly according to claim 1, characterized in that the lubricating material used is one or a combination of nano onion carbon, molybdenum sulfide, nano diamond particles, in vacuum greater than 1 x 10 -5 Pa, coefficient of friction less than 0.01.
9. The bearing assembly of claim 1, wherein each of the lubricant-receiving grooves has a depth of H1, the solid lubricant for spaces such as nano onion carbon, molybdenum sulfide, nano diamond particles has a height of H2, and H1 and H2 satisfy: H1/H2 is more than or equal to 0.4 and less than or equal to 0.8.
10. The solid lubricant for space use of nano onion carbon, molybdenum sulfide, nano diamond particles or the like according to claim 1 has a particle size of not more than 50 nm.
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| CN202210746568.2A CN115013437A (en) | 2022-06-29 | 2022-06-29 | Long-life ultralow-friction solid lubrication sliding bearing assembly for spacecraft |
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| CN202210746568.2A CN115013437A (en) | 2022-06-29 | 2022-06-29 | Long-life ultralow-friction solid lubrication sliding bearing assembly for spacecraft |
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