CN201615140U - Sliding bearing - Google Patents
Sliding bearing Download PDFInfo
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- CN201615140U CN201615140U CN2010290440843U CN201029044084U CN201615140U CN 201615140 U CN201615140 U CN 201615140U CN 2010290440843 U CN2010290440843 U CN 2010290440843U CN 201029044084 U CN201029044084 U CN 201029044084U CN 201615140 U CN201615140 U CN 201615140U
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- aluminum
- bearing
- ceramic layer
- sliding bearing
- metal layer
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Abstract
The utility model discloses a sliding bearing, which comprises a back metal layer, a middle aluminum-based bearing metal layer and a ceramic layer covered on the surface of the aluminum-based bearing metal layer. The aluminum-based bearing metal layer is made of aluminum alloy or aluminum-based composite materials, and the ceramic layer is an Al2O3 ceramic layer. The sliding bearing has the advantages of fine wear resistance, fatigue resistance, fine running-in ability, fine compliance and minimum meshing tendency without being easily damaged by foreign impurities.
Description
Technical field
The utility model belongs to and relates to the sliding bearing technical field, particularly a kind of differential arc oxidation AL that forms on the aluminum-based bearing layer on surface of metal
2O
3The sliding bearing of ceramic layer.
Background technique
Sliding bearing is to be used for supporting axial workpiece and to make the important mechanical component that can make slide relative between supporting plane.Therefore, the common feature the during work of all sliding bearings be the rotating shaft surface relatively and bearing surface sliding motion is arranged.The existence of sliding motion must be accompanied by the generation of friction and wear, and friction causes heating and increase power consumption penalty that wearing and tearing cause bearing failure.For reducing friction and wearing and tearing, bearing must operate under the good lubricating status.Yet, in the real work, parking, startup, environment and some accidentalia and cause the sliding bearing working state can not satisfy the fluid lubrication condition, it is to transmit by the direct sliding contact between the sulidus face that partial load is arranged between bearing and the axle journal, promptly be in boundary lubrication condition, so friction and wear and heating are inevitable.The material for sliding bearing how to choose remedies the deficiency of lubricating condition, seem particularly important, at the performance characteristic of sliding bearing, desirable material for sliding bearing has following various performance: but antifriction quality, wear resistance, seizure resistance embeddability, running-in, bearing capacity, fatigue resistance, lipophile, corrosion resistance.
Along with development of modern science and technology, the working environment of sliding bearing becomes increasingly complex, require sliding bearing can work long hours under special operation conditions such as high temperature, high load, deep-etching, require simultaneously that engineering goods are energy-conservation, consumption reduction, non-maintaining, bearing products develops to low friction, miniaturization, long lifetime direction, this has higher requirement to material for sliding bearing, and an urgent demand development adapts to the material for sliding bearing of different working conditions.Particularly from the viewpoint of environmental protection, it is green innoxious to require material for sliding bearing to realize, lead will be rejected from bearing material gradually.Because at present all contain a certain amount of lead in most of bearing materials such as copper base, aluminium base and Babbitt, unleaded enforcement will make decreased performance such as the reduction of material for sliding bearing antifriction quality, compliance variation, bite-resistant.Therefore develop the high-performance Pb-free material for sliding bearing and technologic material is the severe challenge that the scholar of section is faced.
Along with shipbuilding and developing of automobile industry, people are more and more higher to the power and the rotating speed index request of motor, thereby also more and more harsher to the military service performance requirement of wear parts such as sliding bearing.For example the confidential load limit of asking of novel diesel is higher than 400N/mm ~ 2 oil film peak pressures (corresponding specific pressure is about 60N/mm ~ 2) far away, and the requirement to the life-span simultaneously also improves greatly, but also will guarantee reliability of operation.Slip with produced in conventional processes can not have been satisfied above-mentioned fatigue resistance and wear resistance requirement, must seek the mechanical properties such as wear-resisting property, load-carrying properties and adaptability of high-abrasive material to improve bearing material of new function admirable, improve the working life of bearing, to adapt to productivity development institute requirement.Because sliding bearing should transfer function power bear very high surface velocity again, this just requires bearing material should have soft component, to obtain good ride quality,, and should not be damaged by exogenous impurity as running-in ability, compliance and as far as possible little stinging and being inclined to; Has hard component again, to obtain good wear resistance and fatigue resistance.Therefore, create the good bearing material of a kind of microstructure, the equally distributed as far as possible metallographic structure of promptly soft, hard component crystal grain is the reasonable approach that improves bearing performance.Based on this thought, Austrian Mi Bagong department (Miba Gleitlager AG) has successfully developed a series of novel bearing material and has patented.These materials have very high wear resistance and fatigue resistance, and have splendid tribological property.The key technology that its adopts is the ultracrystallite kernel structure material that bearing sputter one deck is had the particular tissues structure, as AlSn20 etc.But this key technology is comparatively complicated, and cost is higher, and a lot of traditional forms of enterprises are difficult to realize.
Summary of the invention
The purpose of this utility model is to provide easily and at an easy rate a kind of have excellent abrasive resistance and fatigue resistance, and what good running-in ability and compliance were good and as far as possible little stinging and being inclined to, and should not be by the sliding bearing that exogenous impurity damaged.
The technical solution that realizes the utility model purpose is: a kind of sliding bearing, the metal layer and the middle aluminum-based bearing metal layer that comprise the back, also comprise the ceramic layer that covers the aluminum-based bearing layer on surface of metal, the material of aluminum-based bearing metal layer is aluminum alloy or aluminum matrix composite, and ceramic layer is AL
2O
3Ceramic layer.Promptly according to different demands, selecting different aluminum alloys or aluminum matrix composite is the bearing metal substrate material, and generate one deck ceramic layer, and realize different functions by different ceramic layer thickness and porosity ratio in the mode of this aluminum-based bearing metal material surface by differential arc oxidation.
The utility model compared with prior art, its remarkable advantage: (1) can realize that sliding bearing is unleaded; (2) ceramic layer growth in situ and bearing metal layer are combined, and seizure resistance is improved; (3) obtainable AL
2O
3Ceramic layer consistency height, hardness height, has extraordinary wear resistance; (4) because bearing AL
2O
3Can there be a large amount of micropores uniformly on the ceramic layer surface, and greater porosity can be realized in ceramic layer inside, is convenient to adhere to and stores solid lubricant and fluid lubricant; (5) because AL
2O
3The ceramic layer resistance to high temperature is good, and simultaneously the thermal conductivity height of aluminum-based bearing metal layer has good heat dispersion, has improved the performance such as wear-resisting, high temperature resistant of bearing greatly, and radiating effect is good, has prolonged the working life of bearing; (6) a large amount of micropores can be realized in the ceramic layer surface, is convenient to further electrotinning, indium, metals such as copper.
Description of drawings
Accompanying drawing is the schematic cross-section of the sliding bearing of mode of execution of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
The utility model sliding bearing comprises the metal layer 3 at back and the aluminum-based bearing metal layer 2 of centre, also comprises the ceramic layer 1 that covers aluminum-based bearing metal layer 2 surfaces, and the material of aluminum-based bearing metal layer 2 is aluminum alloy or aluminum matrix composite, and ceramic layer 1 is AL
2O
3Ceramic layer.
The utility model sliding bearing, ceramic layer 1 are the arc differential oxide ceramic layers that adopts microarc oxidation treatment process to generate on the surface of aluminum-based bearing metal layer 2.The thickness of this ceramic layer 1 is 2 microns--350 microns.Differential arc oxidation is to act on a kind of new process that light metal surface forms ceramic membrane by the electrion in the electrolytic solution, is one of research focus of present material surface modifying technology.Micro-arc oxidation films is a matrix growth in situ ceramic membrane, in conjunction with firm, ceramic membrane is evenly fine and close, controlled porosity, corrosion resistance, wear resistance are good, and this technical matters is simple simultaneously, environmental pollution is little, the parts processed ability is strong, and particularly the workability to irregular part, hole, weld seam is better than other surface ceramic metallization processes, is a kind of rising process of surface treatment.
It is generally acknowledged that micro-arc oxidation films mainly is made up of compacted zone and weaker zone, compacted zone and matrix bond good with outside weaker zone interlocking together.Compacted zone crystal grain is tiny, and voids is very little, does not have obvious pore and other defect, and hardness and insulation resistance are all very big; Weaker zone crystal grain is thicker, has a lot of holes and other defect, and is more coarse loose, and have a lot of microscopic cracks inwardly to expand again around the hole.But compacted zone and weaker zone do not have tangible separatrix.
Test shows that at the differential arc oxidation initial stage, ceramic membrane is comparatively fine and close, does not almost observe weaker zone, but along with the prolongation in processing time and thickening of rete, forms loose top layer gradually, and final weaker zone proportion can be up to about 90% of rete total thickness.The reason that forms loose surface layer is owing to the differential arc oxidation later stage, and higher micro-arc discharge voltage makes that the oxidizing process of internal layer is carried out on the one hand to the puncture that repeats of original rete, and the existence of the discharge hole of large-size forms weaker zone on the other hand.
The differential arc oxidation time should rationally be controlled.Though along with the increase of oxidization time, oxide thickness increases gradually, reach the regular hour after, the thickness speedup slows down even no longer increases.Oxidization time is long also can to cause in the rete that secondary discharge phenomenon or formation appears in some metal the weaker zone proportion too high.The thickness of testing surface aluminum alloy differential arc oxidation film general maximum reach 400 microns (0.4mm), but too much electric energy and time must be consumed, and the rete total thickness is weaker zone more than 85%, therefore with THICKNESS CONTROL between 2 microns to 350 microns and that porosity ratio is controlled at 0.5%--70% is comparatively suitable, owing to be the ceramic layer of aluminium based metal growth in situ, so between the two in conjunction with firm.
The utility model sliding bearing, it is 0.5 micron that there is diameter range in this ceramic layer 1 surface--40 microns micropore has the porosity ratio of 0.5%--70% simultaneously.
Below in conjunction with embodiment the utility model is described in further detail.
Embodiment 1: after the flat board that is combined with 1050 layers of aluminum alloys on will the steel plate as back-metal is processed into the bearing of semicircular cylinder shape, carry out degreasing, oil removing is cleaned, and passes through differential arc oxidation again, cleans, and can finish after the subsequent treatment.
Wherein micro-arc oxidation process is a known general-purpose technology, herein with reference to the technological operation of U. S. Patent 6197178.
Embodiment 2: after the flat board that is combined with 5052 layers of aluminum alloys on will the steel plate as back-metal is processed into the bearing of semicircular cylinder shape, carry out degreasing, oil removing is cleaned, and passes through differential arc oxidation again, cleans, and electrotinning can be finished after the subsequent treatment.
Embodiment 3: with aluminum alloy 7050 as back-metal and aluminum-based bearing metal, the sheet material of aluminum alloy 7050 is processed into the bearing of semicircular cylinder shape after, heat-treat, degreasing, oil removing is cleaned, and passes through differential arc oxidation again, cleans, and can finish after the subsequent treatment.
Claims (4)
1. sliding bearing, the metal layer [3] and the middle aluminum-based bearing metal layer [2] that comprise the back, it is characterized in that: also comprise the ceramic layer [1] that covers aluminum-based bearing metal layer [2] surface, the material of aluminum-based bearing metal layer [2] is aluminum alloy or aluminum matrix composite, and ceramic layer [1] is aluminium oxide AL
2O
3Ceramic layer.
2. sliding bearing according to claim 1 is characterized in that: ceramic layer [1] is the arc differential oxide ceramic layer that adopts microarc oxidation treatment process to generate on the surface of aluminum-based bearing metal layer [2].
3. sliding bearing according to claim 1 is characterized in that: the thickness of this ceramic layer [1] is 2 microns--350 microns.
4. sliding bearing according to claim 1 is characterized in that: it is 0.5 micron that there is diameter range in this ceramic layer [1] surface--40 microns micropore has the porosity ratio of 0.5%--70% simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290440843U CN201615140U (en) | 2010-02-05 | 2010-02-05 | Sliding bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290440843U CN201615140U (en) | 2010-02-05 | 2010-02-05 | Sliding bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201615140U true CN201615140U (en) | 2010-10-27 |
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ID=43001509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010290440843U Expired - Fee Related CN201615140U (en) | 2010-02-05 | 2010-02-05 | Sliding bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201615140U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748380A (en) * | 2012-07-06 | 2012-10-24 | 东南大学 | High-speed water bearing structure with micro-arc oxidation film layer |
| CN109307009A (en) * | 2018-10-31 | 2019-02-05 | 嘉兴立新材料有限公司 | A kind of reinforced self lubrication bearing |
| CN114713766A (en) * | 2022-03-29 | 2022-07-08 | 南京理工大学 | Grinding process for joint bearing inner ring |
-
2010
- 2010-02-05 CN CN2010290440843U patent/CN201615140U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748380A (en) * | 2012-07-06 | 2012-10-24 | 东南大学 | High-speed water bearing structure with micro-arc oxidation film layer |
| CN102748380B (en) * | 2012-07-06 | 2015-04-15 | 东南大学 | High-speed water bearing structure with micro-arc oxidation film layer |
| CN109307009A (en) * | 2018-10-31 | 2019-02-05 | 嘉兴立新材料有限公司 | A kind of reinforced self lubrication bearing |
| CN114713766A (en) * | 2022-03-29 | 2022-07-08 | 南京理工大学 | Grinding process for joint bearing inner ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20130205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |