CN102777499A - Super polymer alloy bearing bush and manufacturing method thereof - Google Patents
Super polymer alloy bearing bush and manufacturing method thereof Download PDFInfo
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- CN102777499A CN102777499A CN2012102140375A CN201210214037A CN102777499A CN 102777499 A CN102777499 A CN 102777499A CN 2012102140375 A CN2012102140375 A CN 2012102140375A CN 201210214037 A CN201210214037 A CN 201210214037A CN 102777499 A CN102777499 A CN 102777499A
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Abstract
The invention discloses a super polymer alloy bearing bush and a manufacturing method thereof. The super polymer alloy bearing bush comprises a steel matrix, wherein the steel matrix is provided with a zinc alloy wire cushion layer, the zinc alloy wire cushion layer is fixed on the steel matrix through a brazing layer, and the zinc alloy wire cushion layer is provided with a high polymer wear resisting layer. According to the super polymer alloy bearing bush and the manufacturing method thereof provided by the invention, the high polymer wear resisting layer with high wear resistance and high mechanical strength is used as a surface friction layer to solve the problems of poor wear resisting performance and short service life of high polymer material, and a copper alloy wire cushion is replaced by the zinc alloy wire cushion with lower price, so that the cost is greatly reduced and is equivalent to the cost of the Babbitt alloy bearing bush in the existing market, and the super polymer alloy bearing bush is convenient to apply and popularize in a large scale. In addition, the components of the high polymer wear resisting layer are further limited, spiral zinc alloy is utilized to form the zinc alloy wire cushion layer so as to further improve the wear resistance of the alloy bearing bush, and the mechanical strength and the elasticity of the alloy bearing bush are guaranteed.
Description
Technical field
The present invention relates to a kind of alloy bearing shell and preparation method thereof, relate in particular to a kind of ultra-high molecule alloy bearing shell and preparation method thereof.
Background technique
All kinds of dynamic and static pressure material for sliding bearing of mechanical manufacturing field extensive use, requirement is little with the friction factor on axle surface, and the wearing and tearing of axle journal are few, and can bear enough big specific pressure.Commonly used have babitt, bronze, a cast iron etc.Be used to make the material of sliding bearing (bearing shell), be attached to usually in the bearing support shell, play antifriction function, claim bearing alloy again.
Bearing metal the earliest is the karmarsch alloy (Sn-7.4Sb-3.7Cu) of American's Babbitt (I.Babbitt) in 1839 invention, and the lead based alloy that is developed into subsequently, therefore claims that tinbase and lead-base bearing alloy are babbitt metal (or bus alloy).The bus alloy is white in color, and often claims " white metal " (white metal) again.Bus alloy bearing material; Best because of the minimum anti-attrition performance of its friction factor in the metal bearing material, be widely used in mechanical manufacturing field always, make all kinds of dynamic and static pressure sliding bearings; The bus alloy has developed into tens trades mark, is the bearing material that various countries widely use.But there are many defectives in the bus alloy material in manufacturing and using process: the one, and high pollution; Because contain a large amount of heavy metal leads in the bus alloy material; In production and application process, all can pollute people and surrounding environment, people's health in serious harm; The 2nd, poor reliability because metallic material receives self attributes restriction, in case hot adhesive wear takes place, bearing shell lost efficacy very soon, the tile kilning of just saying usually grinds axle, this moment equipment can't run well can only shutdown maintenance, cause stopping production loss consequence ten minutes seriously.Especially for the machinery of working continuously for a long time (like the grinding machine of all kinds of large pumps, motor, building material industry, the Sliding bush of hydraulic turbine generator), reliability is particularly important, in case shutdown loss is inestimable.This difficult problem perplexs mechanical industry always, up to the seventies, has invented metal-plastic thrust bearing by Kuibyshev aeronautical engineering institute of the former Soviet Union, and its bush material adopts pure teflon and copper wire pads to be composited.Solved the difficult problem that the hydraulic generator set thrust bearing tile kilning is shut down.The nineties is introduced China and is mainly used in hydraulic generator thrust bearing.But because the pure ptfe surface layer wear-resisting property difference life-span is low, mechanical strength is low, easy-cold flow; Cuprum alloy price height makes the device fabrication entreprise cost far above bus alloy bearing shell, and these defectives make it apply and are restricted.Especially (like the pebble mill of large pump, pump motor, metallurgical building material industry etc.) still can't adopt so far on the maximum radially bearing shell of bus alloy consumption.
Summary of the invention
Technical problem to be solved by this invention provides a kind of ultra-high molecule alloy bearing shell and preparation method thereof, can improve the alloy wear-resistance of bearing pad, and guarantees the mechanical strength and the elasticity of alloy bearing shell, and cheap, easy to utilize.
The present invention solves the problems of the technologies described above the technological scheme that adopts to provide a kind of ultra-high molecule alloy bearing shell; Comprise steel base; Wherein, be disposed with saxonia metal wire bed course and high molecular abrasion-proof layer on the said steel base, said saxonia metal wire bed course is fixed on the steel base through brazing layer.
Further, said saxonia metal wire cushion thickness is 5.0～5.5mm, and said saxonia metal wire bed course is laid by the spiral zinc alloy bourdon tube of multistage and rearranged.
Further, said saxonia metal wire bed course is composed of the following components by weight percentage:
Nickel 0.3-0.7%
Magnesium 0-0.005%
Iron 0-0.05%
Copper 0-0.05%
Titanium 0-0.05%
Aluminium 0-0.05%
Manganese 0-0.05%
Plumbous 0-0.003%
Cadmium 0-0.003%
Zinc is surplus.
Further, said ultra-high molecule alloy bearing shell be circular arc type radially watt or be the thrust bearing shoe valve of plane, said high molecular abrasion-proof layer is the polytetrafluoroethylplastic plastic layer, said polytetrafluoroethylplastic plastic layer thickness is 4.0～4.5mm.
Further, said high molecular abrasion-proof layer is composed of the following components by weight percentage:
Polyimide 5%-20%;
The brilliant 10%-30% of potassium titanate;
Pure teflon 10%-50%;
Polyphenyl fat is surplus.
The present invention solves the problems of the technologies described above the preparation method that another technological scheme that adopts provides a kind of above-mentioned ultra-high molecule alloy bearing shell, comprises the steps: a) the zinc alloy coiled to be formed the saxonia metal wire bed course; B) on the saxonia metal wire bed course, spread the high molecule plastic powder, compacting forms the plastics tiling; C) the plastics tiling is put into sintering furnace and carry out sintering; D) the plastics tiling that sinters is cut according to size requirement; E) put into catalyzer after the tiling of excision forming is cleaned up and soak, put into the molten tin bath tining then; F) with the heating of the steel base that processes, and with tining after the soldering of plastics tiling together.
Further, the high molecule plastic powder is composed of the following components by weight percentage in the said step b):
Polyimide 5%-20%;
The brilliant 10%-30% of potassium titanate;
Pure teflon 10%-50%;
Daikin company model is that the resin of PTFE MG7060 is a surplus.
Further, said high molecule plastic powder packed is in the saxonia metal wire bed course, and said high molecule plastic powder covers the saxonia metal wire bed course fully and forms the high molecular abrasion-proof layer that thickness is 4.0～4.5mm above that.
Further, the sintering process of plastics tiling is following in the said step c): the plastics tiling that suppresses is put into sintering furnace, 350 ℃～380 ℃ sintering temperatures 4～6 hours.
Further, said steel base surface scribbles C06-1 red iron oxide alkyd primer and C04-49 synthetic enamel.
The present invention contrasts existing technology has following beneficial effect: ultra-high molecule alloy bearing shell provided by the invention and preparation method thereof, the high molecular abrasion-proof layer that adopts the high abrasion high mechanical properties have overcome short problem of pure polytetrafluoroethylmaterial material wear-resisting property difference life-span as the surface friction layer; Adopt the lower saxonia metal wire pad Alloy instead of Copper alloy silk pad of price, saxonia metal wire pad price is merely 1/3rd of Cuprum alloy silk pad price, has reduced cost significantly; Suitable with existing market bus alloy bearing shell cost; Be convenient to apply on a large scale, and do not contain heavy metal lead, environmentally safe; Compare with bus alloy axle, environmental protection is reliable again; In addition, the present invention selects for use the helical zinc alloy to form the saxonia metal wire bed course through further limiting the component of high molecular abrasion-proof layer, further improves the alloy wear-resistance of bearing pad, and guarantees the mechanical strength and the elasticity of alloy bearing shell.
Description of drawings
Fig. 1 is a ultra-high molecule alloy thrust bearing shoe valve cross-sectional view of the present invention;
Fig. 2 is the partial enlarged drawing at A place among Fig. 1;
Fig. 3 is a radially watt cross-sectional view of ultra-high molecule alloy of the present invention;
Fig. 4 is a ultra-high molecule alloy bearing shell preparation flow schematic representation of the present invention.
Among the figure:
1 high molecular abrasion-proof layer, 2 saxonia metal wire bed course, 3 brazing layers
4 steel base
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
Fig. 1 is a ultra-high molecule alloy thrust bearing shoe valve cross-sectional view of the present invention; Fig. 2 is the partial enlarged drawing at A place among Fig. 1; Fig. 3 is a radially watt cross-sectional view of ultra-high molecule alloy of the present invention
See also Fig. 1, Fig. 2 and Fig. 3; Ultra-high molecule alloy bearing shell provided by the invention comprises steel base 4, and wherein, steel base 4 is provided with saxonia metal wire bed course 2; Saxonia metal wire bed course 2 is fixed on the steel base 4 through brazing layer 3, and saxonia metal wire bed course 2 is provided with high molecular abrasion-proof layer 1.
Ultra-high molecule alloy bearing shell provided by the invention, saxonia metal wire bed course 2 thickness are preferably 5.0～5.5mm, and saxonia metal wire bed course 2 is laid by the spiral zinc alloy bourdon tube of multistage and is rearranged, thereby guarantees enough mechanical strengths and elasticity.Said ultra-high molecule alloy bearing shell be circular arc type radially watt or the thrust bearing shoe valve of plane.Fig. 1 is a ultra-high molecule alloy thrust bearing shoe valve cross-sectional view of the present invention, has following characteristic: 1) steel base 4 chemical compositions meet the JB/ZQ4287-86 regulation, forge the back normalized treatment; 2) steel base 4 forging do not allow interlayer, folding, crackle, scab, defective such as slag inclusion; 3) remove scum, oxide etc., emery wheel smoothing in case of necessity after gas cutting is shaped; 4) carry out stress removing after the roughing; 5) do not have in the high molecular abrasion-proof layer 1 on alloy bearing shell surface slag inclusion, layering, crackle and obvious pore do not allow saxonia metal wire bed course 2 and appear; 6) the high molecular abrasion-proof layer 1 on alloy bearing shell surface is a monoblock polytetrafluoroethylplastic plastic layer, and thickness is 4.0～4.5mm; 7) high molecular abrasion-proof layer 1 and saxonia metal wire bed course 2, saxonia metal wire bed course 2 and steel base 4 strong bonded, phenomenon does not allow layering, snaps and shells; 8) saxonia metal wire bed course 2 does not exceed steel base 4; 9) 12 thrust bearing shoe valves of every cover, every is provided with the platinum thermoresistance thermometer and uses the hole; 10) allow the number of playing hole in steel base 4 left and right sides; 11) one group of 12 size needs unanimity, size 90mm, EE Error Excepted 0.03mm.
Fig. 3 is a radially watt cross-sectional view of ultra-high molecule alloy of the present invention, and concrete characteristic is following: 1) steel base 2 foundry goods are circular arc, before processing, will carry out annealed; 2) steel base 4 casting surfaces of not processing are wanted thorough Ex-all molding sand, after cleaning through gasoline, are coated with one deck C06-1 red iron oxide alkyd primer, are coated with the red synthetic enamel of one deck C04-49 again.
Fig. 4 is a ultra-high molecule alloy bearing shell preparation flow schematic representation of the present invention.
See also Fig. 4, the preparation method of ultra-high molecule alloy bearing shell provided by the invention comprises the steps:
S301: form saxonia metal wire bed course 2,, draw back and be cut into the consistent spring of length, be layered in the mould equably with the zinc alloy coiled;
S302: the high molecule plastic powder is clean with mesh screen, and mixing is layered in the mould of having completed the silk pad equably in proportion, by the pressure compacting formation plastics tiling of technological requirement; Said high molecule plastic powder packed is in saxonia metal wire bed course 2, and said high molecule plastic powder covers saxonia metal wire bed course 2 fully and forms the high molecular abrasion-proof layer 1 that thickness is 4.0～4.5mm above that;
S303: the plastics tiling that suppresses is put into sintering furnace, 350 ℃～380 ℃ sintering temperatures 4～6 hours;
S304: size by drawing is with plastics tiling excision forming;
S305: put into catalyzer after the plastics tiling of excision forming cleaned up and soak, put into the molten tin bath tining then;
S306: with the steel base that processes 4 heating, and with tining after the soldering of plastics tiling together, soldering should firmly not have the gap.At last the plastic made tile that soldering is good is finish grinded to the requirement size by drawing; The plastic made tile that mill is good is cleaned out, is derusted, and coats rust preventive oil, wraps with plastic pellicle, puts into packaging box.
Describe respectively with different saxonia metal wire bed courses and high molecular abrasion-proof layer material below.
Saxonia metal wire bed course of the present invention is composed of the following components by weight percentage: nickel 0.3%; Zinc 99.7%.
The present invention adopts high molecular plastic alloy to substitute the bus alloy.The research of high molecule plastic has been become the important topic of domestic how tame scientific research institutions and unit, as: solid lubrication National Key Laboratory of Lanzhou Inst. of Chemical Physics, Chinese Academy of Sciences; South China Science & Engineering University's college of materials science and engineering; Chemical engineering institute of Guangdong University of Technology; All there is further investigation in Shenyang aeroengine at dawn Co., Ltds etc. to this type of material, and on all kinds of journals of tribological field and publication, delivers its achievement.The present invention combines actual conditions to need according to the principle and the means of these achievements, utilizes MM-200 type friction and wear tester and Work condition analogue testing machine, filters out satisfactory high polymer alloy composition.
PTFE (polyphenyl fat) the MG7060 high-antiwear self-lubricating resin that the main component of high polymer alloy surface wear-resistant layer directly adopts Daikin company to produce is that (its performance is seen table 1 to main body; Technical order is seen table 2); Other compositions are respectively: weight percentage is 5% polyimide, to increase the adhesive strength of transfer membrane and antithesis; Weight percentage is 15% potassium titanate crystalline substance, utilizes its very strong heterogeneous nucleation ability to improve the degree of crystallinity of alloy and the integrity of crystallization, further strengthens the mechanical strength and the wear-resisting property of alloy; Weight percentage is 10% pure teflon, is used for remedying the loss that other alloying constituents are brought friction factor.
Table 1
Table 2
Embodiment 2
The saxonia metal wire bed course is composed of the following components by weight percentage: nickel 0.5%; Magnesium 0.003%; Iron 0.03%; Copper 0.03%; Titanium 0.03%; Aluminium 0.03%; Manganese 0.03%; Plumbous 0.002%; Cadmium 0.003%; Zinc is 99.342%.
The PTFE MG 7060 high-antiwear self-lubricating resins that the main component of high polymer alloy surface wear-resistant layer directly adopts Daikin company to produce are main body; Other compositions are respectively: weight percentage is 20% polyimide, to increase the adhesive strength of transfer membrane and antithesis; Weight percentage is 30% potassium titanate crystalline substance, utilizes its very strong heterogeneous nucleation ability to improve the degree of crystallinity of alloy and the integrity of crystallization, further strengthens the mechanical strength and the wear-resisting property of alloy; Weight percentage is 20% pure teflon, is used for remedying the loss that other alloying constituents are brought friction factor.
The saxonia metal wire bed course is composed of the following components by weight percentage: nickel 0.7%; Magnesium 0.005%; Iron 0.05%; Copper 0.05%; Titanium 0.05%; Aluminium 0.05%; Manganese 0.05%; Plumbous 0.003%; Cadmium 0.003%; Zinc 99.039%.
The PTFE MG7060 high-antiwear self-lubricating resin that the main component of high polymer alloy surface wear-resistant layer directly adopts Daikin company to produce is a main body; Other compositions are respectively: weight percentage is 10% polyimide, to increase the adhesive strength of transfer membrane and antithesis; Weight percentage is 10% potassium titanate crystalline substance, utilizes its very strong heterogeneous nucleation ability to improve the degree of crystallinity of alloy and the integrity of crystallization, further strengthens the mechanical strength and the wear-resisting property of alloy; Weight percentage is 50% pure teflon, is used for remedying the loss that other alloying constituents are brought friction factor.
Be ultra-high molecule alloy bearing shell of the present invention and existing bus alloy bearing shell and the pure performance comparison of tetrafluoro bearing shell (each 5 cell mean) on the MM-200 friction wear testing machine of gathering of adopting below, test conditions is following:
Testing installation: MM200 friction wear testing machine test mass: 200N lubricating condition: dry friction
Mean velocity: 0.417m/s (200r/min) test period: every group each 2 hours
Concrete performance comparison is as shown in table 3:
Table 3
Can be found out that by table 3 coefficient of waste of ultra-high molecule alloy bearing shell provided by the invention has the excellent friction performance much smaller than bus alloy bearing shell and pure teflon bearing shell, wear-resisting property far is better than bus alloy bearing shell and pure teflon bearing shell.
Be the testing property that carry out ultra-high molecule alloy bearing shell of the present invention at Dalian University of Technology's vibration and strength test center (national MA level laboratory) below; Its result shows that ultra-high molecule alloy bearing shell provided by the invention can satisfy the mechanical property requirement of all kinds of hybrid sliding bearings, is the desirable upgrading regeneration product of bus alloy and pure teflon bearing shell.
One, ultra-high molecule alloy bearing shell compression testing report of the present invention
1, detects foundation: GB16748-1997
2, detection facility: CSS2220 electronic universal tester
3, detect step: sample is applied compressive force continuously; Measure the length difference of sample; And drafting compressive stress-strain curve, the compression limit Φ d2 of the modulus of elasticity in comperssion Ec of compressive stress when confirming that by plotted curve ess-strain is linear and strain, the compression limit Φ d0.2 of disproportional compressive strain 0.2%, disproportional compressive strain 2% and the compressive strength Φ d50 of 50% compressive strain.
4, the modulus of elasticity in comperssion testing result is as shown in table 4:
Table 4
5, compression limit and compressive strength testing result are as shown in table 5:
Table 5
Two, ultra-high molecule alloy bearing shell wearing layer friction factor report of the present invention
1, detects foundation: GB10006-1988, JT/T4-2004
2, detection facility: CSS-2210 electronic universal tester, FRLR50kN load sensor
3, detect step:
5 groups of samples are placed on respectively on the steel plate, and steel surface roughness is Ra1.6, and steel plate hardness is HB240～270; Load P is 7MPa, 11MPa, 15MPa; Frictional force F is applied by the CSS-2210 electronic universal tester, and constant displacement speed is 0.005m/s;
4, the friction factor testing result is as shown in table 6:
Table 6
To sum up, the present invention passes through to select the component of high molecular abrasion-proof layer, and selects for use the helical zinc alloy to form the saxonia metal wire bed course, further improves the alloy wear-resistance of bearing pad, guarantees the mechanical strength and the elasticity of alloy bearing shell; Have the following advantages 1, the excellent friction performance, friction factor is little, wear-resisting property good (seeing table 1 and table 3), tile kilning does not grind the reliability that axle has improved equipment operation; 2, the feature of environmental protection is good, because bearing shell adopted high polymer alloy and saxonia metal wire material to be composited, these materials are no matter in production with safeguard and produce three-waste pollution in the using process hardly.All can surrounding environment be polluted in the using process producing and safeguard and contain the plumbous bus alloy bearing shell of plurality of heavy metal, human and animal's health in serious threat; 3, good energy saving property; The effect of frequent startup, shutdown and the impulsive load of equipment in the work; Lubricant film is destroyed, cause producing the dry friction phenomenon to grinding even part, the frictional resistance moment of increase not only causes the fuel tank temperature to raise; Increase the consumption of power of motor simultaneously, this phenomenon is more outstanding on bearing shell (as: pebble mill that the mine cement industry is used etc.) radially.The high polymer alloy bearing shell is than on average low 10 ℃ of bus alloy bearing shell fuel tank running temperatures, and operating current is little by about 5%; 4, little to the mill matching part abrasion, because extremely hanging down, high polymer alloy bearing shell surface energy has good self-lubricating property, when dry friction takes place, playing the effect of protecting it to preserve to grinding the surperficial transfer membrane that forms of even part; 5, good race and performance need not scraping after the processing, and the workload of having saved installation and maintenance has shortened the installation and maintenance time, has reduced maintenance expenses.6, than bus alloy bearing shell and pure teflon bearing shell better wear resistance (seeing table 1) and adaptability, simulated condition test and proved that in the real machine test of water pump, pebble mill the high molecular polymer that contains polyphenyl fat has good water lubrication performance.
Though the present invention discloses as above with preferred embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little modification and perfect, so protection scope of the present invention is when being as the criterion with what claims defined.
Claims (10)
1. ultra-high molecule alloy bearing shell; Comprise steel base (4); It is characterized in that be disposed with saxonia metal wire bed course (2) and high molecular abrasion-proof layer (1) on the said steel base (4), said saxonia metal wire bed course (2) is fixed on the steel base (4) through brazing layer (3).
2. ultra-high molecule alloy bearing shell as claimed in claim 1 is characterized in that, said saxonia metal wire bed course (2) thickness is 5.0～5.5mm, and said saxonia metal wire bed course (2) is laid by the spiral zinc alloy bourdon tube of multistage and rearranged.
3. according to claim 1 or claim 2 ultra-high molecule alloy bearing shell is characterized in that said saxonia metal wire bed course is composed of the following components by weight percentage:
Nickel 0.3-0.7%
Magnesium 0-0.005%
Iron 0-0.05%
Copper 0-0.05%
Titanium 0-0.05%
Aluminium 0-0.05%
Manganese 0-0.05%
Plumbous 0-0.003%
Cadmium 0-0.003%
Zinc is surplus.
4. ultra-high molecule alloy bearing shell as claimed in claim 1; It is characterized in that; Said ultra-high molecule alloy bearing shell be circular arc type radially watt or be the thrust bearing shoe valve of plane; Said high molecular abrasion-proof layer (1) is the polytetrafluoroethylplastic plastic layer, and said polytetrafluoroethylplastic plastic layer thickness is 4.0～4.5mm.
5. ultra-high molecule alloy bearing shell as claimed in claim 1 is characterized in that, said high molecular abrasion-proof layer (1) is mainly composed of the following components by weight percentage:
Polyimide 5%-20%;
The brilliant 10%-30% of potassium titanate;
Pure teflon 10%-50%;
Polyphenyl fat is surplus.
6. the preparation method of a ultra-high molecule alloy bearing shell as claimed in claim 1 is characterized in that, comprises the steps:
A) the zinc alloy coiled is formed the saxonia metal wire bed course;
B) on the saxonia metal wire bed course, spread the high molecule plastic powder, compacting forms the plastics tiling;
C) the plastics tiling is put into sintering furnace and carry out sintering;
D) the plastics tiling that sinters is cut according to size requirement;
E) put into catalyzer after the tiling of excision forming is cleaned up and soak, put into the molten tin bath tining then;
F) with the heating of the steel base that processes, and with tining after the soldering of plastics tiling together.
7. the preparation method of ultra-high molecule alloy bearing shell as claimed in claim 6 is characterized in that, the high molecule plastic powder is composed of the following components by weight percentage in the said step b):
Polyimide 5%-20%;
The brilliant 10%-30% of potassium titanate;
Pure teflon 10%-50%;
The resin of the PTFE MG7060 that Daikin company produces is a surplus.
8. the preparation method of ultra-high molecule alloy bearing shell as claimed in claim 7; It is characterized in that; Said high molecule plastic powder packed is in the saxonia metal wire bed course, and said high molecule plastic powder covers the saxonia metal wire bed course fully and forms the high molecular abrasion-proof layer that thickness is 4.0～4.5mm above that.
9. the preparation method of ultra-high molecule alloy bearing shell as claimed in claim 6 is characterized in that, the sintering process of plastics tiling is following in the said step c): the plastics tiling that suppresses is put into sintering furnace, 350 ℃～380 ℃ sintering temperatures 4～6 hours.
10. the preparation method of ultra-high molecule alloy bearing shell as claimed in claim 6 is characterized in that, said steel base surface scribbles C06-1 red iron oxide alkyd primer and C04-49 synthetic enamel.
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| CN104948587A (en) * | 2015-05-29 | 2015-09-30 | 江苏飞月轴瓦有限公司 | Three-layer structure main bearing shell |
| CN105972082A (en) * | 2016-05-25 | 2016-09-28 | 镇江市经纬工程机械有限公司 | Preparation method of aircraft bearing |
| CN107559301A (en) * | 2017-09-03 | 2018-01-09 | 安徽天裕汽车零部件制造有限公司 | A kind of automobile straight tube bushing and preparation method thereof |
| CN110594296A (en) * | 2019-07-16 | 2019-12-20 | 淄博昂洋节能环保科技有限公司 | Element with high polymer material layer and manufacturing method thereof |
| CN111687506A (en) * | 2020-06-15 | 2020-09-22 | 郑州机械研究所有限公司 | Method and device for manufacturing babbitt metal bush |
| CN116836511A (en) * | 2023-08-30 | 2023-10-03 | 燕山大学 | Manufacturing method of three-layer composite self-lubricating bearing bush for inner curve hydraulic motor |
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