CN85108624A - The friction bearing material of dry mixing (mixing) - Google Patents
The friction bearing material of dry mixing (mixing) Download PDFInfo
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- CN85108624A CN85108624A CN 85108624 CN85108624A CN85108624A CN 85108624 A CN85108624 A CN 85108624A CN 85108624 CN85108624 CN 85108624 CN 85108624 A CN85108624 A CN 85108624A CN 85108624 A CN85108624 A CN 85108624A
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Abstract
A kind of friction materials that is suitable for doing bearing composed as follows:
(1) resol of 20-40% weight;
(2) graphite of 5-15% weight;
(3) carbon black of 0.5-3.5% weight;
(4) high-temperature non-asbestos fiber of 40-60% weight, its component have the CaO of 25% weight and the SiO of 35% weight at least
2
(5) acrylic fibre of 4-10% weight.
Description
Involved in the present invention is a kind of friction goods new, that be suitable for doing bearing materials.
Industrial, particularly industrial in transportation, the friction goods that can be used as bearing materials there is a kind of lasting demand.Certainly, bearing materials plays a part very important therein, and they help to alleviate vibrations.This is crucial in railway and automotive industry.
For many years, asbestos are used as the toughener use of friction bearing material always.But in recent years, industrial demand to asbestos is not too high.Therefore, a kind of replacement contain asbestos, its intensity, wear rate studies with the friction bearing material that physical propertys such as friction efficiency can be compared with the goods that contain asbestos.
Therefore, providing a kind of do not contain asbestos, effective bearing materials, is purpose of the present invention.
Other situation of the present invention, other purpose and advantage thereof will be come to understand from this specification sheets and its additional instruction.
According to this invention, I have had been found that a kind of new, friction materials that do not contain asbestos, that can be used as bearing.This novel material is made up of following composition: (a) resol; (b) graphite; (c) carbon black; (d) a kind of high temperature fiber that does not contain asbestos; (e) acrylic fibre.This physical property that friction materials had that does not contain asbestos, be can with contain characteristic asbestos, that do the friction materials that bearing uses and compare.
The percentage ratio of used above-mentioned composition is shown in the following table by general, excellent, optimal tables in the new friction materials of the present invention.
Table 1
Weight percentage
Composition
General excellent optimum
Resol 20-40 25-35 30
Graphite 5-15 8-12 10
Carbon black 0.5-3.5 1-3 2
Non-graphite high temperature fiber 40-60 45-55 51
Acrylic fibre 4-10 6-8 7
The used this resol of the present invention should a kind ofly be fit to use as binding agent.Such resin is the reaction product of a kind of typical phenol and acetaldehyde, and wherein first (ant) aldehyde is typical.Such material is that everybody is familiar with, and in the literature narration is arranged more.Typically being described in the modern times moulds in the 10th of encyclopedia (1970-1971) the 4th volume and can find.
Any can large quantities of supplies graphite and the grade of carbon black can both be used for the present invention.No matter large quantities of supplying raw material be used, in fact raw material will be a pure carbon, its granularity in fact (promptly being about 95% at least) less than 74 millimicrons.This raw material is incorporated into several reasons in the friction materials, comprise to color, intensity is provided and help reduces friction.
The no asbestos high temperature fiber that the present invention is used, general is by the CaO of at least 25% weight and the Si of 35% weight
2O forms, preferably the Si of the CaO of at least 30% weight and 40% weight
2O.The typical high temperature fiber is a sub-thread.A kind of typical asbestos-free high temperature fiber is my PMFTM fiber of producing of the Jim Walter Resources, Inc. (US) 3500-35th Avenue North, Alabama 35207, U.S.A. in agate state Birmingham city (Jim Walter Re-sources Inc).Every adopted high temperature fiber, the common mean diameter that a 2-10 micron is all arranged, best is the 4-6 micron; The form that a 30-70 is arranged is than (length/diameter), preferably 40-60.
For the present invention, acrylic fibre is defined as containing arbitrarily, at least the fibrous matter of 85% weight of vinyl cyanide.Best, acrylic fibre will be 100% polyacrylonitrile homopolymer, pethidine (Dolanit) 10TM that sells as Chester suddenly (Hoechst) the fiber industry company of the Si Patanbuen (Spartanburg) of South Carolina.
Raw material of the present invention can be molded in the friction materials with arbitrary method in common.This pre-light of forming the goods of doing usually mixes.Mixture is put into mold, then at room temperature, carries out mold pressing under pressure, makes phenolic resin adhesive and other composition combinations, forms a kind of solid matrix.
Usually, the temperature of mold pressing mixture is from about 275 °F.Best about 300 °F.Typical molding pressure be from about 100 to about 2000 pounds/cun, preferably the 1300-1500 pound/cun.Typical clamp time be from about 10 minutes by 50 minutes.
In the following table 1, represent a typical products and its of the present invention, also represented a kind of typical products and its that contains the friction materials of asbestos.Two kinds of goods are to make with above-mentioned elementary mixing method and mold pressing program.
The composition that all provide in the table 1 all is a percentage ratio (round-off is near whole percentage ratio) by weight
The table I
Component contains the of the present invention of asbestos
The goods goods
Resol (a) 30% 30%
Amorphous graphite 10% 10%
Carbon black 2% 2%
Fibrous magnesium silicate (b) 58%-
High temperature fiber (c)-51%
Acrylic fibre (d)-7%
100% 100%
Annotate:
(a) No. 421 powdery phenol formaldehyde resins of Johns-Manville;
(b) 7 Do, 2 fibrous magnesium silicates;
(c) I clings to No. 204 mineral fibre that agate state Birmingham Jim Walter Resources, Inc. (US) 3500-35th Avenue North, Alabama 35207, U.S.A. produces
(d) the Dolanitlo(original text sold of Nan Luokanalaisipatan Bu Enhuo Chester company is that northern Luo Kana comes, be not inconsistent with said in the literary composition, so change into literary composition in said consistent-annotation of translation).
Below the table II listed containing of enumerating in the table I asbestos with the slip resistance of the anti-goods friction materials goods that do not contain asbestos and the comparison numerical value of ultimate compression strength.
The table II
What characteristic test method contained asbestos does not contain asbestos
The goods goods
Slip resistance Psi ASTM-D-732* 7,050 7240
Ultimate compression strength Psi ASTM-D-695*
Maximum value 〉=30,000 〉=30,000
Yield value 18,000 16,650
Young's modulus 121,000 107,100
* 0.05 cun/minute speed is carried out, and sample thickness is 1/2 " specified size.
Numeral in the table II shows slip resistance and the ultimate compression strength that asbestos-free goods of the present invention have, and is similar to the goods that contain asbestos from statistic data.
The table III has been listed the comparative data of the abrasion test of two kinds of goods that the table I enumerates.Taking the lead of the friction materials sample that in these trials, includes diameter is 1-5/8 ", thickness is 1/2 " (or contain asbestos, perhaps do not contain asbestos) heads on a fixed steel plate under 100 pounds of/cun load effects.Take the lead with 17-68 rice/cun predetermined speed rotation.After initial preliminary operation after a while, carry out the substance test as follows: the friction materials sample is earlier through accurate weighing and measurement.Allow it and fixation steel plate finish the engagement of four " states " then.Under each state, sample and steel plate all will carry out a series of engagement, and engagement each time all will continue the regular hour, an of short duration cooling is then arranged and take off every engagement time.Each state is ended, and again sample is carried out accurate weighing and measurement.After one of four states is finished, carry out most " skidding ".Under this state, sample and steel plate all are maintained at the state of continuous engagement, continue 30 minutes, the movement velocity of taking the lead this moment be 20 meters/time.
The result of this this test is expressed as follows:
(1) mean value is 0.115
(2) mean value is 0.122
(3) mean value is 0.011
(4) mean value is 0.006
The data of listing in the above-mentioned table III show that the friction goods that contains asbestos is 0.115 to 0.122 with the goods average friction coefficient that does not contain asbestos of the present invention.But testing data shows that the comprehensive average wear rate of goods of the present invention is lower than the goods that contain asbestos, and average wear rate of the present invention is 0.006 cun/horsepower-hour, and the average wear rate that contains the goods of asbestos is 0.011 cun/horsepower-hour.
In the situation of not violating scope of the present invention or spirit, be possible to above making some rational modifications.
Claims (6)
1, a kind of component characteristics of the friction materials that is suitable for being used as bearing is as follows:
(a) resol of 20-40% weight;
(b) graphite of 5-15% weight;
(c) carbon black of 0.5-3.5% weight;
(d) high-temperature non-asbestos fiber of 40-60% weight, its composition are the CaO of at least 25% weight and the SiO of 35% weight
2
(e) acrylic fibre of 4-10% weight.
2,, be fit to be used as friction materials composed as follows of bearing according to article one requirement:
(a) resol of 25-35% weight;
(b) graphite of 8-12% weight;
(c) carbon black of 1-3% weight;
(d) high-temperature non-asbestos fiber of 45-55% weight, its composition are to have the CaO of 25% weight and the SiO of 35% weight at least
2;
(e) acrylic fibre of 6-8% weight.
3, by the 2nd requirement, friction materials composed as follows:
(a) resol of 30% weight;
(b) graphite of 10% weight;
(c) carbon black of 2% weight;
(d) high-temperature non-asbestos fiber of 51% weight, its composition are to have the CaO of 25% weight and the SiO of 35% weight at least
2;
(e) acrylic fibre of 7% weight.
4, by said 1(a in article one requirement) resol of indication is a kind of third fluosite.
5, by said 1(d in the 1st requirement) high-temperature non-asbestos fiber of indication is at least by the CaO of 30% weight and the SiO of 40% weight
2Form.
6, by said in the 1st requirement, acrylic resin is a kind of 100% vinyl cyanide homopolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85108624 CN85108624A (en) | 1984-07-06 | 1985-11-23 | The friction bearing material of dry mixing (mixing) |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/628,172 US4508855A (en) | 1984-07-06 | 1984-07-06 | Dry mix friction bearing material |
| CN 85108624 CN85108624A (en) | 1984-07-06 | 1985-11-23 | The friction bearing material of dry mixing (mixing) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85108624A true CN85108624A (en) | 1987-06-10 |
Family
ID=25742132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85108624 Pending CN85108624A (en) | 1984-07-06 | 1985-11-23 | The friction bearing material of dry mixing (mixing) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85108624A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106563801A (en) * | 2016-11-09 | 2017-04-19 | 安徽孺子牛轴承有限公司 | High temperature resistant and corrosion resistant bearing material and preparation method thereof |
-
1985
- 1985-11-23 CN CN 85108624 patent/CN85108624A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106563801A (en) * | 2016-11-09 | 2017-04-19 | 安徽孺子牛轴承有限公司 | High temperature resistant and corrosion resistant bearing material and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |