Friction surface

FIELD: machine building.

SUBSTANCE: friction surface (1) of part (2) has regular relief in form of cavities (3) acting as lubricating tanks for the surface applied lubricant (4). Surface of cavities (3) is covered with layer of the material (5) having lower adhesion properties in relation to the used lubricant (4) in comparison with the friction surface (1).

EFFECT: higher efficiency of lubrication.

2 dwg

 

The invention relates to mechanical engineering and can be used to improve wear resistance, oil lubricated friction surfaces of various parts of machines and mechanisms.

Known friction surface containing a layer of lubricant (see, for example, staroselskoe A. A., Garkunov L. N. "Durability of moving parts of machines." M: mechanical engineering, 1967, page 243).

The disadvantage of this surface is that the applied lubricant in the process of friction intensively displaced from the surface, which leads to increased its wear.

As the prototype was taken to the surface friction, lubricated with regular relief in the form of grooves, which act as lubricant reservoirs (see, for example, Odintsov L., "Hardening and finishing details by surface plastic deformation: a Handbook. - M.: Mashinostroenie, 1987", page 305).

The disadvantage of this friction surface is that the lubricating material in the recesses of the relief, not effectively coming from in the zone of friction, especially if the deepening of relief rather large and the surface material, including in the recesses of the relief, has high adhesive properties with respect to this lubricant. This leads to a shortage of the lubricant in the area of friction and enhanced wear.

The image is the group solves the problem of increasing the effectiveness of the lubrication.

This lubricated the friction surface has regular relief in the form of recesses, the surface of the recess is covered with a layer of material having a lower adhesive properties with respect to the applied lubricating material than the material of the friction surface.

The invention is illustrated in the drawing, which shows: the surface friction of the part (top view) - Fig.1 and the surface - section of Fig.2.

The drawing shows: item 1 with the friction surface 2, the deepening of the oil tank 3, the lubricant 4, a layer of anti-adhesive material 5.

This surface friction as follows. On the surface of the recesses 3, performed on the friction surface 2 of the workpiece 1, is applied, for example, by electroplating or sputtering, the layer of material 5 having a lower adhesive properties with respect to the applied lubricant 4 than the material of the friction surface 2. If, for example, the material of the friction surface 2 - steel 45, the anti-adhesion material 5, you can use chrome. Applied chrome will facilitate migration deposited on the surface 1 (and in the recesses 3) lubricant 4 in the process of part 1 of the recesses 3 on the surface 2. This provides a presence on the surface 2 of the necessary quantity of lubricating material the material. The thickness of the layer of coating material 5 is minimal, it is not subject to abrasion, as it is directly in the process of friction is not involved.

Compared with the prototype, the surface friction by improving the mode of feeding lubricant to the friction zone details will enhance its durability and longevity.

The surface friction, mainly lubricated with regular relief in the form of recesses, characterized in that the surface of the recess is covered with a layer of material having a lower adhesive properties with respect to the applied lubricating material than the material of the friction surface.



 

Same patents:

FIELD: wood working industry.

SUBSTANCE: plain bearing is made from compressed impregnated wood with a radial arrangement of fibres and uniform density along the whole section and contains greasing in amount 7-8% from the wood mass, and metal inclusion. The wood of the bearing contains nano-crystalline cellulose in the amount 0.5-0.8% from the wood mass, and the metal inclusion is implemented as a continuous nickel film in amount 4-6% from the wood mass with the width 0.8 mcm, covering internal surface of wood completely. The method of manufacture of the named plain bearing is also offered which comprises the manufacture of segments (4) of compressed impregnated wood with a radial arrangement of fibres and radiuses of rounding of the future bearing, application of glue, installation into auxiliary cartridge clip (1), pressing through a cone (2) with a cone angle (2), allowing to increase a density up to the value 1350 kg/m3 minimum, glue solidification and, if necessary, machining job along an internal diameter with a minimum rough tolerance.

EFFECT: improvement of quality of a plain bearing and decrease of manufacture complexity.

2 cl, 6 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to application of CuFe2P in sleeve bearing or as material of sleeve bearing, with CuFe2P representing copper alloy, which contains 2.1-2.6 wt % Fe, 0.05-0.2 wt % Zn 0.015-0.15 wt % P, to 0.03 wt % Pb and to 0.2% of other additives. Invention additionally relates to composite material (1) of sleeve bearing, which contains support layer (2) and bearing metal layer (3) based on CuFe2P with Fe2P particles formed on it (4).

EFFECT: creation of sleeve bearing material, which has advantages of copper-based materials, in which it is possible to refuse from application of lead and which has good workability and excludes bearing cramping, in addition, material of sleeve bearing was easily produced and applied on usual support layers, with application of CuFe2P resulting in sleeve bearings with high heat conductivity and good mechanic properties.

11 cl, 2 dwg, 2 tbl, 2 ex

FIELD: engines and pumps.

SUBSTANCE: set of inventions relates to ICE sliding parts. Proposed part comprises substrate with coating thermally deposited thereon and exposed contact surface including at least two different-strength two-phase-material coating. Note here that at least one of coating phases of lower strength is recessed relative to the other coating phase. Making of the part includes preparation of substrate, thermal deposition of coating with exposed contact surface to recess at least one of material phases relative to the other phase. Note also that lower-strength coating material is recessed.

EFFECT: optimum tribological properties.

20 cl, 1 dwg, 1 ex

FIELD: machine building.

SUBSTANCE: sleeve is made from composite polymer anti-friction material on the basis of polyamide containing carbon fibre or a mixture of carbon fibre with glass fibre as a fibrous filler. In addition, the material contains chaotic carbon nanotubes in the form of single-layer, multi-layer graphite planes with the number of layers of 2 to 70 or inserted into each other and bent into a tube; outside diameter of carbon nanotubes is 0.1 to 100 nm, and their length is 1 to 70 mcm. As a base, the material also contains polyamide mixture with 20-40 wt % of polyethylene caproamide. As material base polyamide, there used is polyamide 6, or Kaprolon B or Ertalon; content of fibre glass in its mixture with carbon fibre of fibrous filler of composite polymer anti-friction material is 3.48 to 10.5 wt % at the following component ratio, wt %: carbon fibre or a mixture of carbon fibre and fibre glass 9.7-42.4; carbon nanotubes 0.05-0.55; polyamide is the rest - up to 100%.

EFFECT: increasing sleeve service life due to considerable reduction of intensity of linear wear of a working layer of sliding at friction on polished steel pair from steel 40X, increasing stability of friction coefficient at friction on the material of counter body from steel 40X, and improving breaking stress at tension, preserving Charpy impact strength on specimens without any notch at simultaneous maintenance of the specified limit of compressive strength, as well as low friction coefficient at increase of its stability.

4 cl, 2 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of wear-proof antifriction self-lubricating alloy with larger amount of alloy. Pulverised powders of Al-40Sn-composition are pelletised and sintered in inert atmosphere at 590-615°C for 90-30 min. Sintered pellet is subjected to equal-channel angular extrusion at invariable position of deformation plane.

EFFECT: high mechanical and tribotechnical properties at steel friction in the absence of lubrication.

7 dwg

FIELD: machine building.

SUBSTANCE: sleeve is made from composite polymer antifriction polyamide-based material containing a mixture of carbon fibre and glass fibre, as well as a powder filler as a fibrous filler. As a material base, it contains polycaproamide or mixture of polycaproamide with 20-40 wt % of polyethylene caproamide. As carbon fibre, the material contains carbon fibre obtained from high-molecular hydrocellulose fibre; content of glass fibre in the mixture is 3.48 to 10.5 wt %. As powder filler, the material contains colloid-graphite solution with particle sizes of 400 to 4000 nm, or silicon oxide in the form of marshalite or colloidal silica with particle sizes of 400 to 8000 nm. Sleeve material contains components in the following ratio, wt %: mixture of carbon fibre and glass fibre 28.5-43.0; powder filler 1.4-3.2; mineral oil 1.0-2.0; polymer matrix is the rest (up to 100%).

EFFECT: increasing sleeve service life due to considerable reduction of intensity of linear wear of a working layer of sliding at friction on polished steel pair from steel 40X, increasing stability of friction coefficient at friction on the material of counter body steel 40X, and improving Charpy impact strength on specimens without any notch at simultaneous maintenance of low friction coefficient and the specified limit of compressive strength.

6 cl, 2 tbl

FIELD: machine building.

SUBSTANCE: proposed antifriction coating comprises molybdenum disulphide and binder. Said binder represents organic silicon compound. Diamond nanoparticles are additionally introduced in coating composition.

EFFECT: higher operating temperatures and wear resistance.

5 cl, 1 ex

FIELD: machine building.

SUBSTANCE: method for manufacturing anti-friction layer of sleeve half-bearing consists in oversized boring after sleeve casting and its plastic deformation. Plastic deformation is made within the range of recrystallisation temperature of matrix alloy phase, but not exceeding the temperature of melting of disperse phases at average speed of deformation 10-2≤ε≤10 s-1. Deformation is made in several transitions with changing of direction by transitions to opposite one. Deformation is done by tool, the material, thermal processing and roughness of which corresponds to the material of shaft neck joined with the bearing.

EFFECT: increase of product wear-resistance due to creation of small grain structure of top layer, provision of positive gradient of mechanical properties by depth, reduction of surface roughness due to smoothing microroughnesses by breaking-in roller and reduction of material wearing-in period.

3 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to use of a composition for making at least one component of a car adjusting device. The composition contains partially crystalline, partially aromatic polyamide and is modified by at least one elastomer with weight ratio from 1% to 10% of the composition. The composition is used to make an adjusting device for changing the position of the controlled car component, having at least one gear wheel of a drive mechanism, one guide element and/or one sliding element.

EFFECT: invention enables to use the composition to make at least one component of an adjusting device and an adjusting device without considerable expenses with mechanical properties sufficient for operation.

14 cl, 7 dwg, 2 tbl, 2 ex

FIELD: machine building.

SUBSTANCE: sliding element with a pre-shaped substrate and galvanically applied anti-friction layer, formed of an alloy of tin, antimony and copper, whose content is in wt %: 5-20% antimony, copper 0.5-20% and the rest is tin, and lead content <0.7%, and the full content of other components is <0.5%, and in the layer of sliding bearing the tin crystals are of predominantly globular shape. Method of receiving a sliding element is that the electrolytic deposition of antifriction layer of an alloy with the components of tin, antimony and copper is carried out, and an electrolyte as a wetting agent preferably contains C13C15-oxo-alcohol, C16C18-fatty alcohol C18-oxo-alcohol with degree of ethoxylation from 10 to 30. The composition and deposition rate are adjusted by addition of auxiliary substances with large molecules, resulting in increased anti-friction layer and emerging of crystals of tin of a globular shape.

EFFECT: creation of the layer for a sliding bearing with improved operating characteristics.

10 cl, 1 ex

FIELD: machine building.

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20 cl, 16 dwg

FIELD: machine building.

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1 dwg

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20 cl, 5 dwg

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2 dwg

FIELD: machine building.

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12 cl, 9 dwg, 2 tbl

FIELD: machine building.

SUBSTANCE: machine has main housing (2), a turning element and at least one bearing device. The latter has a working bearing and retaining bearing (8) matching with the working bearing. Bearing (8) has race (9) of bearing of main housing (2) and race (10) of bearing of the turning element, which is located so that it can be turned relative to race (9) of the bearing of main housing (2). When the machine is in normal operating conditions, the turning element is installed durably in a non-contact manner with possibility of being turned relative to housing (2) above the working bearing so that race (10) relative to race (9) performs no turning movement. When the machine is in specific operating conditions, in which the turning element is not installed durably in a non-contact manner with possibility of being turned relative to housing (2) above the working bearing, the turning element brings race (10) into rotation relative to race (9) so that turning element (4) is installed above bearing (8) at least for a short period of time in a contact manner with possibility of being turned. Antifriction layer (11) made as liquid metal is located between race (9) and race (10).

EFFECT: providing especially long service life of a retaining bearing owing to making an antifriction layer from liquid metal, which reduces friction so that only inconsiderable heating of the retaining bearing occurs in specific operating conditions.

9 cl, 4 dwg

FIELD: machine building.

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EFFECT: increasing wear resistance of bearing and its service life in connection with intensive heat removal from friction zone of the insert and crank journal of the shaft.

2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to well drilling equipment including rotary exit preventer comprising body and bearing assembly. Bearing assembly comprises outer bushing interacting with adjacent casing surface, inner bushing, bearings and preloading element. Outer bushing has central bore while inner bushing is fitted inside said central bore and can be withdrawn therefrom. Bearings are jointed between said bushings to allow their concentric arrangement and relative rotation. First of said bearings takes up radial loads applied in between said bushings while second bearings takes up loads applied in lengthwise direction between said bushings. Preloading element maintains load at second bearing and said bushings to preload the bearing taking up lengthwise load.

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7 cl, 18 dwg

FIELD: oil and gas industry.

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7 cl, 18 dwg

FIELD: machine building.

SUBSTANCE: friction part in lubricating medium is designed for operation at contact pressure exceeding 200 MPa. Part surface is textured and before or after texturing it undergoes face-hardening treatment for reduction of part surface friction coefficient. The surface has periodic chain of micro-metre type cavities, the largest length of which amounts from 5 to 500 microns and period is less than half of width of contacting surface.

EFFECT: depth of the said cavities is less or equal to 3 microns that allows shifting to elastic-hydrodynamic lubrication mode.

17 cl, 4 dwg, 3 ex

FIELD: mechanical engineering.

SUBSTANCE: plain axial bearing comprises inserts having steel housings provided with axial and radial bearing surfaces. The steel housing of each of the inserts receives radial and axial bearings made of antifriction material. The radial bearing is made of a half bushing with grooves on the outer surface. The axial bearing is made of a half disk with radial recesses on the faces. The ring grooves on the outer surface of the half bushing are provided with end collars. The inner surface of the half bushing are provided with hollows which define a relief with the system of discrete recesses. The spaces of the ring grooves are connected with the recesses through passages.

EFFECT: enhanced durability of the bearing.

3 dwg

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