CN101413543B - Dry friction self-lubricating slide bearing - Google Patents

Dry friction self-lubricating slide bearing Download PDF

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Publication number
CN101413543B
CN101413543B CN2008102355864A CN200810235586A CN101413543B CN 101413543 B CN101413543 B CN 101413543B CN 2008102355864 A CN2008102355864 A CN 2008102355864A CN 200810235586 A CN200810235586 A CN 200810235586A CN 101413543 B CN101413543 B CN 101413543B
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friction
layer
copper powder
weight percentage
sintering
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Expired - Fee Related
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CN2008102355864A
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CN101413543A (en
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王大力
邓晓霖
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Jiangsu CCVI Bearing Co., Ltd.
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JIANGSU CCVI BEARING CO Ltd
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Abstract

The invention discloses a dry friction self-lubricating sliding bearing which is obtained by rolling three layers of composite materials. The three layers of composite materials comprise a metal substrate; a spherical porous copper powder layer which is sintered on one surface of the metal substrate; and an anti-friction wear resistant material layer which permeates and covers the copper powder layer, wherein, the copper powder layer consists of the following components by weight percentages: 8% of tin powder, 3% of zinc powder and copper powder; the anti-friction wear resistant material layer consists of the following components by weight percentages: 40-60% of polytetrafluoroethylene, 10-15% of polyimide, 3-6% of molybdenum disulfide and tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA). The dry friction self-lubricating sliding bearing has the advantages of small initial friction coefficient, less heat production, easy formation of a transfer membrane, minimal damage to a grinding shaft and the like; meanwhile, the application of the bearing can be expanded to fields of food, pharmacy, beverage, hydrotechnics, medical machinery and the like as manufacturing raw materials do not contain hazardous substances such as lead, toluene and the like.

Description

A kind of dry friction self-lubricating slide bearing
Technical field
The present invention relates to a kind of sliding bearing, the sliding bearing that particularly a kind of multilayer materials is made belongs to technical field of bearings.
Background technique
Three layers of composite bearing in the Nonlubricated bearing draw the initiative of West Asia company by Britain's lattice, are called for short DU.Its product is a matrix with laminar steel plate, and intermediate sintering has spherical porous bronze bisque, and roll based on teflon surface shop is the plumbous mixture of being furnished with of PTFE, infiltration, topped above-mentioned copper powder layer and sintering and become anti-friction wear-resistant layer.At last above-mentioned three-layer composite board material is rolled into the bearing of the sleeve-like of different size according to the size of axle.The DU class bearing of Sheng Chaning is the SF-1 class at home all over the world, has been widely used in occasions such as height, middle load, the slow-speed of revolution.But the powder of lead and gas are overflowed during owing to work, and are therefore repelled when sector applications such as food, medicine.
The patent No. is that to have proposed glide lamella be the scheme that anti-friction wear-resistant layer needn't be sought help from lead or its compound to the patent of invention of ZL99106284.1.In matrix material PTFE (teflon) of this layer or the mixture of high-melting-point fluorine thermoplastic and PTFE, contain Powdered aramid at least, its volume accounts for the 10-50% of this stratum total.But, still contain part lead in the bronze bisque of this scheme, and handle mixture with toluene and aluminum nitrate when making, therefore still can pollute.
The publication number of being submitted by U.S. Dana Corp is the patent application of CN1292852A, disclosing backing layer is new departure of anti-friction wear-resistant layer, by volume contains the fluoropolymer of melt-processable of the fibrillation aramide-fibre of granular ion fluoride, 2-10% of 10-30% and 2-10% and the PTFE of its surplus, there is document to show, (1) fluoride is a Toxic, as NaF; (2) sneaking into of fibrillating fibre needs outside the special equipment, and also under a cloud have a carcinogenic possibility.In addition, without exception, use toluene and aluminum nitrate in the production process indispensably; Product also uses low-viscosity (mobile) liquid lubricated, so also repelled by industries such as food.
As everyone knows, PTFE has very low friction factor, is 0.04-0.05 generally speaking, and friction ractor is 0.016 under high load.It is stratiform structure, and its combination force with one deck is stronger, but the interlayer combination force is very weak, very easily slide relative.During motion, can form transfer membrane on the antithesis surface in the short time at the utmost point, so the PTFE friction factor is very little.But its stickability on mating material is relatively poor, therefore this is the main cause that causes heavy wear, adds which kind of material and can make bearing have the abrasion resistance properties that less friction factor can improve bearing simultaneously again under the dry friction working condition to become the problem that technos generally is concerned about in PTFE.
Summary of the invention
The object of the present invention is to provide a kind of dry friction working condition and free of contamination self-lubricating plain bearing of being applicable to, this self-lubricating plain bearing has that initial friction factor is little, and heat production is few, and it is easy to form transfer membrane, to the little advantage of mill axle damage.
The present invention can be achieved by the following technical programs:
A kind of dry friction self-lubricating slide bearing of the present invention, form by 3-layer composite material is rolling, described 3-layer composite material is respectively metal substrate, is sintered in the spherical porous copper powder layer of metal substrate one side and infiltrates the also friction reducing abrasion resistant material layer of covering copper bisque, the weight percentage of wherein said friction reducing abrasion resistant material layer consists of: 40~60% teflon, 10~15% polyimide, 3~6% molybdenum disulfide, all the other are tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA).
Above-mentioned a kind of dry friction self-lubricating slide bearing, the weight percentage of wherein said copper powder layer consists of: 8% glass putty, 3% zinc powder, all the other are copper powder.
Above-mentioned a kind of dry friction self-lubricating slide bearing, the weight percentage of wherein said friction reducing abrasion resistant material layer consists of: 55% teflon, 12% polyimide, 5% molybdenum disulfide, 28% tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA).
Above-mentioned a kind of dry friction self-lubricating slide bearing, wherein said metal substrate are low carbon steel plate.
The manufacture method of above-mentioned a kind of dry friction self-lubricating slide bearing may further comprise the steps:
A, on metal substrate the sintered copper bisque;
B, making anti-friction wear-resistant layer can be sprawled software:
A, joining powder, is 40~60% teflon by weight percentage, 10~15% polyimide, and 3~6% molybdenum disulfide, all the other are the ratio batching of tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA);
B, stirring mix stirring three times with above-mentioned powder, stirrer rotating speed 200-400r/min, and each 5-10 minute, make it become mixture, to sieve for three times then, sieve mesh is more than 100;
C, system can be sprawled software, are that 71% solid content be 60% ptfe emulsion with weight percentage is that 29% said mixture mixes with weight percentage, and stirring is 5-10 minute in rotating speed is the 20-60r/min stirrer, 15~25 ℃ of temperature,
Roll C, shop, above-mentioned anti-friction wear-resistant layer can be sprawled the software shop roll on the copper powder layer, and thickness is 0.01-0.03mm;
D, oven dry were dried by the fire 20-40 minute down at 220~280 ℃;
E, in roll, with the oven dry after sheet material reroll once, amount of rolling is 0.01-0.03mm;
F, sintering, sintering in the nitrogen protective sintering stove, 360~380 ℃ of sintering temperatures, sintering time 35-40 minute, nitrogen gas purity was more than 99.9%;
G, finish to gauge, with the sheet material behind the sintering, finish to gauge is rolled 0.01mm down at least to finished product sheet material;
H, blanking roll, and the big or small blanking according to bearing rolls into axle sleeve.
Polyimide (PI) is meant the heterocycle polymer that contains imine group in the macromolecular main chain.The outstanding characteristic of PI is that heat resisting temperature reaches more than 240 ℃; All the heat distortion temperature of benzene type PI can be 260 ℃ long-term down uses up to 360 ℃; PI belongs to difficult combustion resin, and it contains oxygen index and reaches 36; Barrier properties for gases is good, and water absorption rate is low.And it has the good mechanical performance, and especially tensile strength, creep resistant, wear resistance and rub resistance are good, and has very excellent electric insulation performance and dimensional stability.PI has excellent oil resistance and solvent resistance, and radiation resistance is good, but the erosion of not alkaline-resisting class chemical product.
Molybdenum disulfide (MoS 2), be the stratiform structure of hexagonal system, very easily between layer and layer, rive, so have good self-lubricating property.MoS 2Can be adsorbed on the metal surface strongly, even also survivable when friction, therefore can bear higher load, data shows, the thick MoS of 2.5 μ m 2Film can bear the above pressure of 2800Mpa, can stand the friction velocity of 40m/s simultaneously.In addition, MoS 2Decapacitation is by outside chloroazotic acid, dense stream acid, boiling concentrated hydrochloric acid, pure oxygen, high-temperature chlorine and the hydrogen attack, in other soda acids, medicine, solvent, water, petroleum products and synthetic lubricant, all do not dissolve, very stable to ambiance, under the general condition not with metal reaction, do not corrode rubber material.Sometimes MoS 2Available graphite substitutes.
Tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA) has excellent thermostability and lower friction factor, chemical-resistant reagent is identical substantially with teflon with the solvent corrosion performance, its surface free energy is lower than teflon, can promote the overall performance of composition, be unlikely to the immiscible decreased performance that causes integral material owing to teflon and other materials.
The present invention is owing to added affixs such as polyimide and molybdenum disulfide in making raw material, these materials have lower friction factor and excellent abrasive energy, the tetrafluoroethylene of Jia Ruing-perfluorinated alkoxy vinyl ether copolymer (PFA) has promoted the overall performance of composition again simultaneously, it is little to make the self-lubricating plain bearing make have an initial friction factor, heat production is few, the formation transfer membrane is easy, and the mill axle is damaged advantages such as little.Simultaneously owing to harmful matters such as not leaded in the manufacturing raw material of this dry friction self-lubricating slide bearing and toluene, so application of the present invention can expand to fields such as food that existing Nonlubricated bearing can't use, pharmacy, water conservancy project, beverage, medical machinery, this is the field that existing Nonlubricated bearing can't be used.
Advantage of the present invention and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiments only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is a half sectional view of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment 1:
As shown in Figure 1, the present invention forms by 3-layer composite material is rolling, described 3-layer composite material is respectively low carbon steel plate 3, is sintered in the spherical porous copper powder layer 2 of steel plate one side and infiltrates the also friction reducing abrasion resistant material layer 1 of covering copper bisque, the weight percentage of copper powder layer 2 consists of: 8% glass putty, 3% zinc powder, and all the other are copper powder; The weight percentage of friction reducing abrasion resistant material layer 1 consists of: 40% teflon, 15% polyimide, 3% molybdenum disulfide, 42% tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA).
Its manufacture method may further comprise the steps:
A, on low carbon steel plate 1 sintered copper bisque 2;
The software sprawled of B, making anti-friction wear-resistant layer 1;
A, joining powder, is 40% teflon by weight percentage, 15% polyimide, 3% molybdenum disulfide, the ratio batching of 42% tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer;
B, stirring mix stirring three times with above-mentioned powder, stirrer rotating speed 200r/min, and each 5 minutes, make it become mixture, to sieve for three times then, sieve mesh is more than 100;
C, system can be sprawled software, are that 71% solid content be 60% ptfe emulsion with weight percentage is that 29% said mixture mixes with weight percentage, and stirring is 5 minutes in rotating speed is the 20r/min stirrer, 15 ℃ of temperature;
Roll C, shop, above-mentioned anti-friction wear-resistant layer can be sprawled the software shop roll on the copper powder layer, and thickness is 0.02mm;
D, oven dry were dried by the fire 20 minutes down at 220 ℃;
E, in roll, with the oven dry after sheet material reroll once, amount of rolling is 0.01mm;
F, sintering, sintering in the nitrogen protective sintering stove, 360 ℃ of sintering temperatures, sintering time 35 minutes, nitrogen gas purity is more than 99.9%;
G, finish to gauge, with the sheet material behind the sintering, finish to gauge is rolled 0.01mm down to finished product sheet material;
H, blanking roll, and the big or small blanking according to bearing rolls into axle sleeve.
Embodiment 2:
The weight percentage of friction reducing abrasion resistant material layer 1 of the present invention consists of: 55% teflon, 12% polyimide, 5% molybdenum disulfide, 28% tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA), remaining material structure is all identical with embodiment 1 with manufacture method.
Embodiment 3:
The weight percentage of friction reducing abrasion resistant material layer 1 of the present invention consists of: 60% teflon, 10% polyimide, 6% molybdenum disulfide, 24% tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA), remaining material structure is all identical with embodiment 1 with manufacture method.
Dry friction self-lubricating slide bearing of the present invention is named and is BK-1W, carries out performance comparison with external well-known producer three layers of composite bearing DU, LFP, and test result is as follows:
Lubricating system is dry friction, and the frictional wear experiment instrument is: HDM-10 end face frictional wear experimental machine, test speed are 0.4m/s, and initial trial load is 4Mpa, load 2Mpa in per 10 minutes, and the result is as follows:
Model Test period (min) Final temperature (℃) Average abrasion amount (mm)
BK-1W 62 150 0.020
DU 62 160 0.022
LFP 62 170 0.033
As seen from the above table, under identical test conditions, final temperature of the present invention is minimum, average abrasion amount minimum.
In addition to the implementation, the present invention can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.

Claims (5)

1. dry friction self-lubricating slide bearing, form by 3-layer composite material is rolling, described 3-layer composite material is respectively metal substrate, is sintered in the spherical porous copper powder layer of metal substrate one side and infiltrates the also friction reducing abrasion resistant material layer of covering copper bisque, it is characterized in that, the weight percentage of described friction reducing abrasion resistant material layer consists of: 40~60% teflon, 10~15% polyimide, 3~6% molybdenum disulfide, all the other are tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer.
2. a kind of dry friction self-lubricating slide bearing as claimed in claim 1 is characterized in that, the weight percentage of described copper powder layer consists of: 8% glass putty, 3% zinc powder, all the other are copper powder.
3. a kind of dry friction self-lubricating slide bearing as claimed in claim 1, it is characterized in that, the weight percentage of described friction reducing abrasion resistant material layer consists of: 55% teflon, 12% polyimide, 5% molybdenum disulfide, 28% tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer.
4. a kind of dry friction self-lubricating slide bearing as claimed in claim 1 is characterized in that, described metal substrate is a low carbon steel plate.
5. the manufacture method of a kind of dry friction self-lubricating slide bearing as claimed in claim 1 is characterized in that, may further comprise the steps:
A, on metal substrate the sintered copper bisque;
B, making anti-friction wear-resistant layer can be sprawled software:
A, joining powder, is 40~60% teflon by weight percentage, 10~15% polyimide, and 3~6% molybdenum disulfide, all the other are the ratio batching of tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer;
B, stirring mix stirring three times with above-mentioned powder, stirrer rotating speed 200-400r/min, and each 5-10 minute, make it become mixture, to sieve for three times then, sieve mesh is more than 100;
C, system can be sprawled software, are that 71% solid content be 60% ptfe emulsion with weight percentage is that 29% said mixture mixes with weight percentage, and stirring is 5-10 minute in rotating speed is the 20-60r/min stirrer, 15~25 ℃ of temperature;
Roll C, shop, above-mentioned anti-friction wear-resistant layer can be sprawled the software shop roll on the copper powder layer, and thickness is 0.01-0.03mm;
D, oven dry were dried by the fire 20-40 minute down at 220~280 ℃;
E, in roll, with the oven dry after sheet material reroll once, amount of rolling is 0.01-0.03mm;
F, sintering, sintering in the nitrogen protective sintering stove, 360~380 ℃ of sintering temperatures, sintering time 35-40 minute, nitrogen gas purity was more than 99.9%;
G, finish to gauge, with the sheet material behind the sintering, finish to gauge is rolled 0.01mm down at least to finished product sheet material;
H, blanking roll, and the big or small blanking according to bearing rolls into axle sleeve.
CN2008102355864A 2008-12-01 2008-12-01 Dry friction self-lubricating slide bearing Expired - Fee Related CN101413543B (en)

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