CN1208560C - Composite material sliding bearing with base of high-temp polymer - Google Patents
Composite material sliding bearing with base of high-temp polymer Download PDFInfo
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- CN1208560C CN1208560C CN 03111884 CN03111884A CN1208560C CN 1208560 C CN1208560 C CN 1208560C CN 03111884 CN03111884 CN 03111884 CN 03111884 A CN03111884 A CN 03111884A CN 1208560 C CN1208560 C CN 1208560C
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Abstract
The present invention belongs to the technical field of polymer based sliding bearings, which discloses a sliding bearing made from high-temperature resistant polymer based composite material. The sliding bearing is made from matrix resin of high-temperature resistant polymers and the composite material compounded of functional additives, reinforced fiber and auxiliary agents according to a conventional forming method. The matrix resin is formed by the blending modification of the matrix resin, polytetrafluorethylene and/or polyamide, and the functional additives are nanometer or micron inorganic nonmetallic fillings; at least one of the functional additives is nanometer particles. The present invention provides the anti-corrosive self-lubricating sliding bearing made from the composite material, which has the advantages of low friction coefficient, fine wear resistant performance, long service life and high PV value.
Description
(1) described technical field
The invention belongs to the technical field of polymer based sliding bearing, particularly a kind of is matrix, fiber reinforcement and the self-lubricating composite sliding bearing that contains antifriction antiwear micro mist functional stuffing with the heat-resistant polymer.
(2) background technique
The polymer matrix composite bearing because have that self-lubricating property is good, corrosion-resistant, damage is invaded in damping noise reduction, anti-foreign matter, cost is low, economize advantages such as energy resources, is one of emphasis direction of novel bearing research and development always.But because be subjected to that the body material high molecular polymer is big to temperature sensitivity, poor heat resistance, thermal conductivity are low, poor dimensional stability, the easily influence of creep etc., are restricting the technical performance and the application area thereof of composite bearing always.Usually be only applicable to＜80 ℃ of low normal temps, the working condition of low speed underloading, low-speed heave-load, intermittent duty.
(3) summary of the invention
The objective of the invention is to select for use heat-resistant polymer is body material, carry out rational material prescription design, to improve the comprehensive technical performance of composite material sliding bearing to greatest extent, provide that a kind of serviceability temperature reaches that friction factor more than 200 ℃ is low, abrasion resistance properties good, long service life, higher corrosion-resistant, the selflubricating heat-resistant polymer based composites sliding bearing of PV value.
The object of the present invention is achieved like this:
The invention discloses a kind of heat-resistant polymer based composites sliding bearing, is the composite material that is composited with heat-resistant polymer matrix resin and functional additive, reinforcing fiber and auxiliary agent, and forming method manufacturing routinely forms.Above-mentioned matrix resin is a kind of or its blend high polymer alloy in the fire resistant resins such as polyimide, Polyetherimide, polyphenylene sulfide, polybenzoate, polyphenyl and miaow Cuo, polyaromatic, elemento-organic polymer, and with account for matrix resin 0-10% (W) teflon and/or polyamide and carry out blending and modifying and form.Above-mentioned functional additive is nanometer or micron-sized inorganic non-metallic filler, and the ratio that accounts for matrix resin is 5-25% (W), and wherein at least a is nanometer particle.
Nano grade inorganic non-metallic fillers of the present invention is＜nano particle of 100nm or the flakey material of unidimensional scale＜100nm, micron order inorganic non-metallic filler is＜and the micro mist of 100um.
Functional stuffing of the present invention is handled with titanate esters or silane coupler, to promote the combination of functional stuffing and matrix resin.
Inorganic Non-metallic Materials of the present invention comprises the anti-attrition functional stuffing and strengthens functional stuffing two classes that the anti-attrition functional stuffing is graphite, expanded graphite, MoS
2, at least a in the carbon black, have the function of anti-friction wear-resistant, selflubricating, thermal conductivity.The enhancing functional stuffing is at least a in aluminium oxide, mica, lead oxide, silicon carbide, lead sulphide, arsenic tungsten, talcum micro mist, Montmorilionite, the silicious marl, has the function of enhancing, toughness reinforcing, increase-volume.
Reinforcing fiber of the present invention is one or more in carbon fiber, glass fibre, steel fiber, the compound brilliant fibre, account for the 5-15% (W) of body material, diameter＜20um, length＜1mm is to bring into play its technical functionality at aspects such as heat conduction, conduction, antifriction, anti-attrition, tears cunning, dimensionally stables.
Auxiliary agent of the present invention is the stabilizer used of used coupling agent of fiber, micro mist and composite material, age resister, strengthening agent, solvent etc.
Sliding bearing of the present invention is made section bar by above-mentioned composite material by adopting injection technique, mould pressing process or expressing technique, is processed into required sliding bearing then.
Below the cooperation ratio and the moulding process of concrete material is introduced:
1. injection moulding polyimide-based composite material sliding bearing
With polyimide (PI) resin demand is mete-wand (weight percentage), with load weighted PI with account for its consumption 5-10% teflon and/or polyamide (PA) blend, two or more adding in the Nano/micron level functional stuffing that accounts for PI consumption 10-25% that will handle with titanate esters or silane coupler wherein mixes in proportion, is uniformly dispersed again; Then while stirring with length＜1mm, one or more reinforcing fibers and the auxiliary agent conventional, constant that account for PI consumption 5-15% add wherein, after brute force stirs more than 5 minutes, put into extruder barrel, carry out fusion, extrude, granulation.At last pellet is placed within the injecting machine material tube, barrel temperature reaches about 350 ℃, through heating, fusion, plasticizing, injects mould under the brute force of screw rod or plunger promotes, and the demoulding just makes the polyimide-based composite material sliding bearing behind cooling and shaping.
2. compression molding polyphenylene sulfide based composites sliding bearing
With polyphenylene sulfide (PPS) resin demand is mete-wand, load weighted PPS added the teflon that accounts for its consumption 5-10% or/and polyamide (PA), polyoxymethylene (POM), add in the Nano/micron level functional stuffing of handling with titanate esters or silane coupler that accounts for PPS consumption 5-15% two or more again; One or more reinforcing fibers of length＜2mm and the conventional constant auxiliary agent that add 5-15% while stirring, at a high speed powerful stir more than 5 minutes after, put it in the Porcelain Jar pebble mill homogenize more about 1 hour.The mould of at last material weighing after the homogenize being packed into is heated to 350 ℃-370 ℃, pressurization 7-8MPa, and pressurize 8-12 minute, naturally cool to room temperature, the demoulding just makes polyphenylene sulfide based composites sliding bearing.
3. extruding and moulding heat-resistant polymer based composites sliding bearing
Earlier with reference to before example 1 manufacturing process half section, heat-resistant polymer resin and polymeric lubricant, Nano/micron functional stuffing, weak point are cut reinforcing fiber, auxiliary agent etc. and mixed, extruding pelletization, at last pellet is inserted within the extruder barrel, heating makes it fusion, plasticizing, under the brute force of screw rod promotes, be extruded into tubulose or column bar, after the typing to be cooled, be processed into required heat-resistant polymer based composites sliding bearing through car, mill by plan by mould.
Heat-resistant polymer based composites sliding bearing of the present invention is owing to can comprehensively bring into play the resistance to high temperature of matrix resin, functional stuffing nano-graphite, MoS
2Anti-friction wear-resistant self lubricity and good heat-conducting, the enhancing toughening effect of nano aluminium oxide, mica, silicon carbide, Montmorilionite etc., and the heat conduction of reinforcing material carbon fiber, selflubricating are strengthened the property, thereby make sliding bearing of the present invention obviously be better than polymers for general use based composites sliding bearing, can long-term work under 200 ℃ of temperature under the identical prerequisite of PV value, in being applicable to/and low speed, light/as to carry down operation continuously, have broad prospect for its application.
The sliding bearing that composite material of the present invention makes, nano particle strengthens, toughening modifying owing to added, and test shows that its upper limit (UL) load improves more than 25% on original basis, and the highest invalid temperature improves more than 20 ℃.The pv value of nano composite material sliding bearing improves more than 20%.
Nano composite material bearing of the present invention, owing to can give full play to nano particle just can significantly reduce bearing material under low consumption friction factor, reduce wear extent, improving its anti-fatigue, resisting impacts, selflubricating, damping, functions such as noise reduction, thereby make sliding bearing performance of the present invention obviously be better than existing polymer matrix composite sliding bearing and metal base sliding bearing, be specially adapted to there is dust in the corrosive environment, impact, low temperature and moisture, can not guarantee the lubricated low-speed heave-load that waits the complex working condition condition, the transmission of low speed underloading has broad prospect for its application.
Therefore, the present invention is owing to select suitable nano functional component material for use, just can improve the anti-friction wear-resistant technical performance of composite material to greatest extent with lower additive amount, provide that a kind of friction factor is low, abrasion resistance properties good, that long service life, PV value are higher is corrosion-resistant, the composite material sliding bearing of selflubricating.
(4) embodiment
1. embodiment's 1. injection moulding polyimide-based composite material sliding bearings
With polyimide (PI) resin demand is mete-wand (weight percentage, below identical), and load weighted PI is carried out blend with the teflon that accounts for its weight 8%.
Get weight again in PI, handled the expanded graphite of 5% micron order (diameter range is 10-50um), the molybdenum disulfide of 5% nanometer (diameter range is 10-50nm) with titanate esters, the silicon carbide of 8% nanometer (diameter range is 8-30nm) is uniformly dispersed with above matrix resin.Then, account for the chopped carbon fiber of PI consumption 10% and the auxiliary agent of constant and add wherein, after brute force stirs more than 5 minutes, put into extruder barrel, carry out fusion, extrude, granulation while stirring with length＜1mm.At last pellet is placed within the injecting machine material tube, barrel temperature reaches about 350 ℃, through heating, fusion, plasticizing, under promoting, the brute force of screw rod or plunger injects mould, the demoulding just makes polyimide-based composite material behind cooling and shaping, and production method routinely can be made into required sliding bearing.
Performance: by the sliding bearing that composite material of the present invention is made, bearing designation is diameter 20mm, and the carrying roller model is diameter 89mm, and its elementary load is 24.5kg, and limit load is 142kg, and invalid temperature is 248 ℃, and the Pv value is 1.49MPa.m/s.Improve 30% than common polyimide (PI) Pv value.
2. example 2. compression molding polyphenylene sulfide based composites sliding bearings
With polyphenylene sulfide (PPS) resin demand is mete-wand, and load weighted PPS is added the polyamide (PA) that accounts for its consumption 6%, carries out blend.
Add again with titanate esters and handled, 2% nanometer (diameter range is 10-80nm) molybdenum disulfide, the aluminium oxide of 5% nanometer (diameter range is 8-20nm) is uniformly dispersed with above matrix resin.Then, account for the compound brilliant fibre of polybenzoate consumption 15% and the auxiliary agent of constant and add wherein while stirring with length＜1mm, powerful at a high speed stir more than 5 minutes after, put it in the Porcelain Jar pebble mill homogenize more about 1 hour.The mould of at last material weighing after the homogenize being packed into is heated to 350 ℃-370 ℃, pressurization 7-8MPa, and pressurize 8-12 minute, naturally cool to room temperature, the demoulding just makes the polyphenylene sulfide based composites, makes sliding bearing with the production method of routine.
Performance: by the sliding bearing that composite material of the present invention is made, bearing designation is diameter 20mm, and the carrying roller model is diameter 89mm, its elementary load is 24.5kg, and limit load is 128.4kg, and invalid temperature is 240 ℃, the Pv value is 1.35MPa.m/s, and the Pv value improves 25%.
3. example 3. extruding and moulding heat-resistant polymer based composites sliding bearings
With the polybenzoate resin demand is mete-wand (weight percentage), and load weighted polybenzoate and the teflon and 5% polyamide that account for its weight 5% are carried out blend.
Get again in polybenzoate weight, added again with what silane coupler was handled and accounted for the expanded graphite that the PPS consumption is wanted 12% micron order (diameter range is 20-90um), the mica of 3% nanometer (diameter range is 10-100nm), the aluminium oxide of 5% micron order (diameter range is 8-30um), the arsenic tungsten of 5% micron order (diameter range is 8-80um).Simultaneously, add while stirring and account for 10%, the glass fibre of length＜2mm and account for 5%, the bronze fiber of length＜2mm after brute force stirs more than 5 minutes, is put into extruder barrel, carries out fusion, extrudes, granulation.At last pellet is inserted within the extruder barrel, heating makes it fusion, plasticizing, under the brute force of screw rod promotes, be extruded into tubulose or column bar, after the typing to be cooled, be processed into required heat-resistant polymer based composites sliding bearing through car, mill by plan by mould.
Performance: by the sliding bearing that composite material of the present invention is made, bearing designation is diameter 20mm, and the carrying roller model is diameter 89mm, its elementary load is 24.5kg, and limit load is 135.4kg, and invalid temperature is 230 ℃, the Pv value is 1.30MPa.m/s, and the Pv value improves 30%.
4. embodiment's 4. injection moulding polyaromatic composite material sliding bearing
With the polyaromatic hydrocarbon resins consumption is mete-wand (weight percentage, below identical), in polyaromatic hydrocarbon resins weight, handled with titanate esters, the graphite of 5% nanometer (diameter range is 10-50nm), the arsenic tungsten of 6% nanometer (diameter range is 10-50nm), the Montmorilionite of 2% nanometer (diameter range is 8-30nm) is uniformly dispersed with above matrix resin.Then, account for the chopped carbon fiber of PI consumption 8% and the auxiliary agent of constant and add wherein, after brute force stirs more than 15 minutes, put into extruder barrel, carry out fusion, extrude, granulation while stirring with length＜1mm.At last pellet is placed within the injecting machine material tube, barrel temperature reaches about 350 ℃, through heating, fusion, plasticizing, under promoting, the brute force of screw rod or plunger injects mould, the demoulding just makes the polyaromatic based composites behind cooling and shaping, and production method routinely can be made into required sliding bearing.
Performance: by the sliding bearing that composite material of the present invention is made, bearing designation is diameter 20mm, and the carrying roller model is diameter 89mm, its elementary load is 24.5kg, and limit load is 128.4kg, and invalid temperature is 230 ℃, the Pv value is 1.36MPa.m/s, and the Pv value improves 25%.
Claims (3)
1. heat-resistant polymer based composites sliding bearing, it is the composite material that is composited with heat-resistant polymer matrix resin and functional additive, reinforcing fiber and auxiliary agent, forming method manufacturing routinely forms, it is characterized in that: above-mentioned matrix resin is a kind of or its blend high polymer alloy in polyimide, Polyetherimide, polyphenylene sulfide, polybenzoate, polyphenyl and miaow Cuo, polyaromatic, the elemento-organic polymer fire resistant resin, and carries out blending and modifying with teflon that accounts for matrix resin 0-10% (W) and/or polyamide and form; Above-mentioned functional additive is nanometer or micron-sized inorganic non-metallic filler, and the ratio that accounts for matrix resin is 5-25% (W), and wherein at least a is nanometer particle; Described nano grade inorganic non-metallic fillers is＜nano particle of 100nm or the flakey material of unidimensional scale＜100nm, micron order inorganic non-metallic filler is＜and the micro mist of 100um; Described inorganic non-metallic filler comprises the anti-attrition functional stuffing and strengthens functional stuffing that the anti-attrition functional stuffing is graphite, expanded graphite, MoS
2, at least a in the carbon black; The enhancing functional stuffing is at least a in aluminium oxide, mica, lead oxide, silicon carbide, lead sulphide, arsenic tungsten, talcum micro mist, Montmorilionite, the silicious marl.
2. heat-resistant polymer based composites sliding bearing as claimed in claim 1 is characterized in that: described reinforcing fiber is one or more in carbon fiber, glass fibre, steel fiber, the compound brilliant fibre, accounts for the 5-15% (W) of body material.
3. heat-resistant polymer based composites sliding bearing as claimed in claim 2 is characterized in that: described reinforcing fiber is compound brilliant fine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03111884 CN1208560C (en) | 2003-02-24 | 2003-02-24 | Composite material sliding bearing with base of high-temp polymer |
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| CN 03111884 CN1208560C (en) | 2003-02-24 | 2003-02-24 | Composite material sliding bearing with base of high-temp polymer |
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| CN1208560C true CN1208560C (en) | 2005-06-29 |
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| CN112500681B (en) * | 2020-12-24 | 2022-02-11 | 中国科学院兰州化学物理研究所 | Synergistic enhanced high-temperature polymer multi-element nano composite material |
| CN113958610B (en) * | 2021-11-05 | 2023-05-05 | 江苏徐工工程机械研究院有限公司 | Bimetal self-lubricating composite shaft sleeve, preparation method thereof and engineering mechanical equipment |
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