FR2499209A1 - AGENT FOR REDUCING FRICTION BETWEEN BODIES SITTING OR SLIDING OVER ONE ANOTHER - Google Patents
AGENT FOR REDUCING FRICTION BETWEEN BODIES SITTING OR SLIDING OVER ONE ANOTHER Download PDFInfo
- Publication number
- FR2499209A1 FR2499209A1 FR8200785A FR8200785A FR2499209A1 FR 2499209 A1 FR2499209 A1 FR 2499209A1 FR 8200785 A FR8200785 A FR 8200785A FR 8200785 A FR8200785 A FR 8200785A FR 2499209 A1 FR2499209 A1 FR 2499209A1
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- FR
- France
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- solid particles
- agent
- another
- bodies
- agent according
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
La présente invention est relative à un agent pour la diminution du frottement entre des corps reposant ou glissant l'un sur l'autre, composé de particules solides microscopiques détachées. The present invention relates to an agent for reducing friction between bodies resting or sliding on each other, composed of detached microscopic solid particles.
Jusqu'ici, on utilise à cet effet du graphite, du talc, du miçromica, du sulfure de molybdene, etc... Dans ce cas, on s'efforce de lubrifier dans une certaine mesure les surfaces en contact au moyen des lubrifiants qui ont une structure plus ou moins lamellaires. Toutefois, plus deux surfaces placées l'une sur l'autre sont lisses, moins il y a d'air entre ces surfaces et plus grande est la force avec laquelle les deux corps sont plaqués l'un contre l'autre par la pression atmosphérique extérieure.Cette compression de surfaces lisses l'une sur l'autre par la pression atmosphérique est pro bablement responsable du fait que, malgré les surfaces lisses des corps en contact, le frottement par adhérence ou par glissement est relativement grand, chose à laquelle les agents antérieurs formés de particules solides ne peuvent guère apporter de changement. Hitherto, graphite, talc, miçromica, molybdenum sulfide, etc. have been used for this purpose. In this case, efforts are made to lubricate the surfaces in contact to a certain extent by means of the lubricants which have a more or less lamellar structure. However, the smoother the two surfaces placed on top of each other, the less air there is between these surfaces and the greater the force with which the two bodies are pressed against each other by atmospheric pressure. This compression of smooth surfaces on top of each other by atmospheric pressure is probably responsible for the fact that, despite the smooth surfaces of bodies in contact, friction by adhesion or sliding is relatively large, something to which the previous agents formed of solid particles can hardly bring about change.
L'invention a pour but de fournir un agent de l'espèce definie plus haut qui diminue, mieux que les agents antérieurs, le frottement entre des pièces reposant ou glissant l'une sur l'autre. The object of the invention is to provide an agent of the species defined above which reduces, better than the previous agents, the friction between parts resting or sliding on one another.
Selon l'invention, le problème posé est résolu par le fait qu'au moins une partie des particules solides ont. une forme spheriqu
Par de telles particules sphériques, les surfaces placees l'une sur l'autre sont maintenues à un certain espacement mutuel et de l'air peut passer entre les particules solides, de sorte que la pression atmosphérique agissant par ailleurs sur les corps peut être pratiquement compensée. Il faut ajouter que les particules solides sphériques ne présentent pas d'aretes ni d'angles qui puissent augmenter le frottement entre les surfaces en contact ; il se produit même une espece d'effet de palier à roulement et, de façon surprenante, il est apparu que malgré leur forme sphérique, les particules solides adherent en quantité suffisante aux surfaces qui entrent en contact entre elles.According to the invention, the problem posed is solved by the fact that at least part of the solid particles have. a spherical form
By such spherical particles, the surfaces placed on top of each other are kept at a certain mutual spacing and air can pass between the solid particles, so that the atmospheric pressure acting otherwise on the bodies can be practically compensated. It should be added that the spherical solid particles do not have edges or angles which can increase the friction between the surfaces in contact; there is even a kind of rolling bearing effect and, surprisingly, it has appeared that despite their spherical shape, the solid particles adhere in sufficient quantity to the surfaces which come into contact with one another.
Afin que cette adhérence existe dans une mesure suffisante, il faut que les particules solides sphériques aient un diametre de 250 um au maximum et pour des corps fermes, formés par exemple de né tal et de pierre, on peut envisager de plus petits diametres, jusqu environ 100 vm, tandis que dans le cas de corps souples ou flexibles ou de corps à surface poreuse, on peut utiliser des sphères de plus grand diamètre. So that this adhesion exists to a sufficient extent, it is necessary that the spherical solid particles have a diameter of 250 μm at most and for firm bodies, formed for example of nickel and stone, it is possible to envisage smaller diameters, up to approximately 100 vm, while in the case of flexible or flexible bodies or bodies with a porous surface, spheres of larger diameter can be used.
Il est vrai que l'on connait déjà un matériau à faible frottement ou résistant à l'usure (brevet AT 359 743) qui contient des microperles de verre pleines. Toutefois, ce matériau est formé en grande partie d'une matiere synthétique pulverulente à poids mo léculaire élevé, les perles de verre et une matiere antistatique servant simplement de charge, l'ensemble du melange étant fritté dans un moule sous une haute pression.Les pièces de machine ou auautres corps façonnés obtenus lors du frittage résistent par euxmêmes à l'usure ou ne donnent lieu qu'à une faible resistance de frottement mais bien entendu, ils sont inutilisables comme agents de diminution du frottement entre deux pièces reposant ou glissant l'une sur l'autre parce qu'un tel agent devrait avoir une tout autre consistance pour que l'on puisse l'appliquer et l'utiliser. It is true that there is already known a material with low friction or resistant to wear (patent AT 359 743) which contains solid glass microbeads. However, this material is formed largely of a pulverulent synthetic material with high molecular weight, the glass beads and an antistatic material serving simply as a filler, the whole mixture being sintered in a mold under high pressure. machine parts or other shaped bodies obtained during sintering themselves resist wear or give rise to only a low friction resistance but of course they cannot be used as agents for reducing friction between two parts resting or sliding l one over the other because such an agent should have a completely different consistency so that it can be applied and used.
Les particules solides sphériques peuvent sans inconvénient être mélangées à des substances actives inhibitrices ou stabilisantes et/ou à des colorants, si leur grosseur de grain correspond au maximum au diametre des sphères. Comme substances actives inhibitrices, on peut envisager, par exemple, des agents anti-corrosion comme le benzoate de sodium, le silicate de sodium, le benzotriazole, etc... The spherical solid particles can without disadvantage be mixed with inhibiting or stabilizing active substances and / or with dyes, if their grain size corresponds at most to the diameter of the spheres. As inhibiting active substances, it is possible to envisage, for example, anti-corrosion agents such as sodium benzoate, sodium silicate, benzotriazole, etc.
Comme substances actives stabilisantes, on citera les anti-oxydants, les agents de protection contre les rayons ultraviolets, etc...As stabilizing active substances, there may be mentioned antioxidants, agents for protection against ultraviolet rays, etc.
Les particules solides sphériques sont formees, de manière en elle-même connue, d'une substance amorphe, afin de faciliter la formation de sphères et d'éviter les formes cristallines. Des microperles de verre en elles-mêmes connues ont donné particulierement satisfaction. The spherical solid particles are formed, in itself known, of an amorphous substance, in order to facilitate the formation of spheres and to avoid crystalline forms. Glass microbeads in themselves known have been particularly satisfactory.
Il serait possible aussi que les particules solides sphé- riques soient formées de produits de polymérisation, parce que la forme sphérique est obtenue tout naturellement lors de la polymérisation. On a fait des essais, avec un bon résultat, en utilisant le polychlorure de vinyle et le polystyrene. It would also be possible for the spherical solid particles to be formed from polymerization products, because the spherical shape is obtained quite naturally during polymerization. We have tried out, with good results, using polyvinyl chloride and polystyrene.
Pour verifier l'action de l'agent selon l'invention, on a incline une surface plane sous un angle de plus en plus grand jusqu'a ce qu'un corps d'essai lesté de 500 g et reposant dessus par une surface de 100 cm2 commence à glisser. Si la surface formant le plan incliné était formée de tôle noire et si le corps reposant dessus est formé de néoprene alvéolaire, il fallait, sans utiliser de lubrifiant, que l'angle d'inclinaison du plan atteigne environ 35 avant que le corps d'essai ne se mette en mouvement. Lorsqu'on utili sait un lubrifiant classique (talc), l'angle d'inclinaison était ramené a 28 , tandis que, lorsqu'on utilisait l'agent selon l'inventif une inclinaison de 90 seulement était nécessaire. On pouvait obtenir des valeurs encore plus avantageuses en utilisant des corps d'essai formés d'un matériau ferme comme le bois, le métal, la pierre, etc.. To verify the action of the agent according to the invention, a planar surface was tilted at an increasingly large angle until a weighted test body of 500 g and resting on it by a surface of 100 cm2 begins to slide. If the surface forming the inclined plane was made of black sheet metal and if the body resting on it is formed of cellular neoprene, it was necessary, without using lubricant, that the angle of inclination of the plane reaches approximately 35 before the body of test does not move. When using a conventional lubricant (talc), the angle of inclination was reduced to 28, while, when using the agent according to the invention, an inclination of only 90 was necessary. Even more advantageous values could be obtained by using test bodies made of a firm material such as wood, metal, stone, etc.
L'agent appliqué était préparé comme suit
On a mélangé intimement 1000 g de microperles de verre d'u diamètre maximal de 80 pm, 100 g de benzotriazole et 100 g de benzoa de sodium. On a passé ce mélange au tamis a largeur d'ouvertures de 80 pm et on l'a applique sur le corps d'essai à raison d'environ 15 g/m2.The applied agent was prepared as follows
1000 g of glass microbeads with a maximum diameter of 80 μm, 100 g of benzotriazole and 100 g of sodium benzoa were intimately mixed. This mixture was passed through a sieve with an opening width of 80 µm and applied to the test body at a rate of about 15 g / m2.
L'agent selon l'invention est utilisable préférentiellemen lorsqu'il s'agit de glisser sur un tube métallique une enveloppe iso lante tubulaire en matière synthétique alvéolaire. The agent according to the invention can preferably be used when it is a question of sliding a tubular iso-lating casing made of cellular synthetic material over a metal tube.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT48981A AT368536B (en) | 1981-02-04 | 1981-02-04 | AGENT FOR REDUCING FRICTION BETWEEN OTHER RELAXING OR SLIDING BODIES |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2499209A1 true FR2499209A1 (en) | 1982-08-06 |
Family
ID=3491962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8200785A Pending FR2499209A1 (en) | 1981-02-04 | 1982-01-19 | AGENT FOR REDUCING FRICTION BETWEEN BODIES SITTING OR SLIDING OVER ONE ANOTHER |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT368536B (en) |
DE (1) | DE3148831A1 (en) |
FR (1) | FR2499209A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2644796A1 (en) * | 1989-03-23 | 1990-09-28 | Rodenstock Optik G | LUBRICANT PRODUCT FOR PARALLEL SURFACES WITH RELATIVE DISPLACEMENT OF PRECISION INSTRUMENT BETWEEN WHICH A VISCOUS LUBRICANT IS INTRODUCED |
WO1995008721A1 (en) * | 1993-09-21 | 1995-03-30 | Buerki Peter Rolf | Uses of microspheres and microspheroids made of diamond, cbn or structured ceramic materials in micromechanics, sensor and medical technology, tribology and related fields |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR83502E (en) * | 1959-05-15 | 1964-08-28 | Lubrication using lubricants loaded with hard solid spherules | |
FR2234815A5 (en) * | 1973-06-21 | 1975-01-17 | Commissariat Energie Atomique | Dry rotary sealing and lubrification system - uses solid lubricant injected into porous body formed of metal powder |
FR2345618A1 (en) * | 1976-01-08 | 1977-10-21 | Sargent Industries | Bearing material with encapsulated non solid micro-lubrication - has thermosetting resin matrix on woven base and adhesive backing |
-
1981
- 1981-02-04 AT AT48981A patent/AT368536B/en not_active IP Right Cessation
- 1981-12-10 DE DE19813148831 patent/DE3148831A1/en not_active Ceased
-
1982
- 1982-01-19 FR FR8200785A patent/FR2499209A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR83502E (en) * | 1959-05-15 | 1964-08-28 | Lubrication using lubricants loaded with hard solid spherules | |
FR2234815A5 (en) * | 1973-06-21 | 1975-01-17 | Commissariat Energie Atomique | Dry rotary sealing and lubrification system - uses solid lubricant injected into porous body formed of metal powder |
FR2345618A1 (en) * | 1976-01-08 | 1977-10-21 | Sargent Industries | Bearing material with encapsulated non solid micro-lubrication - has thermosetting resin matrix on woven base and adhesive backing |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2644796A1 (en) * | 1989-03-23 | 1990-09-28 | Rodenstock Optik G | LUBRICANT PRODUCT FOR PARALLEL SURFACES WITH RELATIVE DISPLACEMENT OF PRECISION INSTRUMENT BETWEEN WHICH A VISCOUS LUBRICANT IS INTRODUCED |
WO1995008721A1 (en) * | 1993-09-21 | 1995-03-30 | Buerki Peter Rolf | Uses of microspheres and microspheroids made of diamond, cbn or structured ceramic materials in micromechanics, sensor and medical technology, tribology and related fields |
Also Published As
Publication number | Publication date |
---|---|
DE3148831A1 (en) | 1982-09-02 |
AT368536B (en) | 1982-10-25 |
ATA48981A (en) | 1982-02-15 |
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