Sleeve of braking leverage system of rail transport

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

 

The text descriptions are given in facsimile form.

1. Bushing brake lever rail systems made of composite polymeric antifriction material based on polyamide, containing a fibrous filler a mixture of carbon fiber and glass fiber, and powder filler, characterized in that as the base polymer composite antifriction material contains polycaproamide or a mixture of polycaproamide with 20-40 wt.% polyethylenepolyamine as carbon fiber in a mixture of carbon fiber and fiberglass Volosnikov the filler polymer composite antifriction material contains carbon fiber, derived from high molecular weight of hydrate cellulose fibers, the content of glass fiber in a mixture of carbon fiber and glass fiber filler composite antifriction polymeric material selected from 3,48 to 10.5 wt.%, as the powder filler contains colloidal graphite product with a particle size of from 400 to 4000 nm or silicon oxide in the form of marshalite or colloidal silica with a particle size of from 400 to 8000 nm, the next time quantitative content, wt.%:

a mixture of carbon fiber and
fiberglass28,5-43,0
powder filleris 1.4-3.2
mineral oil1,0-2,0
polymer matrixthe rest is up to 100%

2. The sleeve according to claim 1, characterized in that as polycaproamide fundamentals of polymer composite antifriction material used polyamide 6, or Caprolon, or Ertalon.

3. The sleeve according to claim 1, characterized in that as colloidal graphite preparation of composite polymer antimicrobacterial use superfine powder of natural graphite s-1, containing not more than 0.3 wt.% the ash.

4. The sleeve according to claim 1, characterized in that carbon fiber and fiberglass composite antifriction polymeric material used in the form of yarn or chopped strands, the length of the chopped strands of carbon fibers selected from 1 mm to 48 mm and the length of the chopped strands of glass fiber selected from 1 mm to 48 mm

5. The sleeve according to claim 1, characterized in that as mineral oil polymer composite antifriction material used oil MS-8.

6. The sleeve according to claim 1, characterized in that preferably made with an outer diameter of 30-50 mm, with an inner diameter of 20-40 mm and a length of 12-120 mm



 

Same patents:

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: metallurgy.

SUBSTANCE: method for producing aluminium-lead friction bearings is that preliminary the workpieces are produced out of porous aluminium with open porosity by the known technologies of casting into reusable moulds. Then the pores are filled with molten lead while a workpiece is located in the same mould. The result is a product with uniform content of lead along the cross-section of the product and the size of lead inclusions is equal to the size of pores in the porous aluminium.

EFFECT: improved quality of aluminium-lead bearings and reduced complexity of their production.

1 ex

FIELD: metallurgy.

SUBSTANCE: thin-layer ceramic coating with the friction surface, formed with the ability to absorb grease with fibrous crystals alpha-Al2O3, characterised by the ability to layering with formation of longitudinal cracks with transverse size of ~ 1 nm and more due to longitudinal defects in the crystal lattice. A method of producing coating with the friction surface involves microarc oxidation of a part in the anode-cathode mode at a ratio of values of Ic/Ia = 1.0 - 1.15 for 90 -240 minutes consecutively in two electrolytes, and microarc oxidation in the second electrolyte is carried out with periodic pulsations of the anodic and cathodic current by 30% - 50% of the DC current mode for formation of longitudinal crystal lattice defects of fibrous crystals alpha-Al2O3.

EFFECT: increased bearing capacity of the thin-layer ceramic coating and the friction surface made on its base, by increasing damping of the mechanical effects on the surface in the pairs of friction formed on its basis.

2 cl

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to materials intended for production of antifriction sheet materials on metal substrate. It may be used for producing antifriction bearings operated both lubed and dry, at higher sliding speeds, loads and temperatures. Porous cermet layer is produced on substrate from iron-nickel alloy by sintering a mix of fine disperse powders of copper and alloy to said substrate by pressing there said mix against said substrate by stainless steel gauze at 810-820°C. After sintering, said gauze is removed to produce sintered porous layer of reticular structure. Content of said powders in said mix makes in wt %: copper - 84-86, tin - 14-16.

EFFECT: higher wear resistance and stable friction factor (0,1-0,12).

2 dwg, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention refers to powder metallurgy, particularly to anti-friction materials for high-loaded friction units. The invention can be implemented, for example for fabrication of anti-friction bushings. Anti-friction powder material on base of copper is produced out of charge containing, wt %: tin powder 0.5-10; led powder 0.5-1.0, graphite 0.3-0.5; copper powder - the rest. Charge is pressed and sintered at successive increase of temperature from 20 to 600°C and conditioning during 1.5 hours. Further temperature is raised to 660 ± 5°C, charge is conditioned during 1.5 hours and cooled in air by means of blow-off in a flow of dissociated ammonia. Charge is then calibrated at specific pressure equal to compacting pressure and is repeatedly sintered with successive increment of temperature form 20 to 860 ± 5 °C, holding during 1.5 hours and cooling in air.

EFFECT: produced material possesses high anti-friction property and high wear resistance.

FIELD: machine building.

SUBSTANCE: friction bearing consists of first element of bearing made out of austenite steel and second element of bearing made out of martensite steel possessing higher hardness. Also the first element corresponds to a padding, surface of which has higher hardness due to treatment by cold deformation of hardening. Additionally the first element is formed with cylinder rims (107, 108) connecting sole of shaft (114) with platform (113), while the second element is formed with bushings (104, 105) positioned in bored orifice of the case (103).

EFFECT: reduced wear occurring between two parts and essentially increased service life of parts.

9 cl, 6 dwg

FIELD: chemistry.

SUBSTANCE: invention refers to powder metallurgy and can be applied in manufacturing of wear-resistant engineering devices and elements, such as slide bearings operating in extreme and dry friction conditions. Antifriction material is based on iron, graphite, calcium fluoride, phosphor, manganese sulphide, zinc and copper at the following component ratio, wt %: graphite 0.5-3, calcium fluoride 0.1-1, phosphor 0.05-1, manganese sulphide 0.1-1, zinc 0.05-1, copper 10-30, the rest is iron.

EFFECT: obtainment of high-temperature dispersed compact iron-based powder materials of enhanced hardness and corrosion resistance.

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: machine building.

SUBSTANCE: in bearing sliding support, antifriction elements in the form of sectors of a cylindrical ring separated in longitudinal direction, and planks in gaps between elements, including support ones, are pressed to the cage with pressure rings owing to elastic connection of the latter to mounting seats formed with radial steps on both ends of antifriction elements and planks on the side of the working surface so that radial force directed to the cage is created. Planks and rings are located at some distance from the working surface.

EFFECT: increasing loading capacity of a single radial bearing sliding support, improving changeability of similar elements of the support, and improving the supply of lubricating-cooling fluid to the friction zone of working surfaces.

11 dwg

FIELD: machine building.

SUBSTANCE: sliding bearing includes a housing and sliding elements mounted on the housing, the sliding surfaces of which have a coating on the basis of nanostructured disperse-strengthened reactivity-sintered silicon carbide (SiC) - 75 - 80 wt % with fibres of silicon nitride (Si3N4) - 5 - 8 wt %, fibres of titanium carbonitrides (TiCN) - 2 - 5 wt %, and quasi-crystals of structural scheme of aluminium, copper and magnesium (Al6Mg4Cu) - 7 - 18 wt %.

EFFECT: complex improvement of operating characteristics of the bearing owing to reducing power consumption for friction, increasing service life of the bearing operation by several times, which allows using it for different assemblies and mechanisms operating in wide temperature range with high axial and radial loads, and in oxidation and erosion medium.

1 tbl

FIELD: machine building.

SUBSTANCE: sliding bearing includes a housing and at least one sliding element installed on the housing, at least the sliding surfaces of which have nanostructured ceramic coating made from powder of silicon carbide with fractions of: nanorange - from 50 to 100 nm, submicron level - from 0.2 to 0.5 mcm and micron level - from 1 to 10 mcm, at content of fractions, wt %: fractions of nanorange 40-60, submicron level 30-40 and micron level 10-20.

EFFECT: complex improvement of the bearing operating characteristics due to maximum reduction of friction coefficient, improvement of wear resistance, hardness, thermal stability, heat resistance, at simultaneous increase in ductility and strength of antifriction ceramic layer due to its nanostructuring.

1 tbl

FIELD: machine building.

SUBSTANCE: sliding bearing with regular microrelief is additionally equipped with a removable steel bushing pressed onto a crank journal of the shaft, to external side of which a regular microrelief is applied, the width and pitch are equal to double value of maximum linear wear of sliding bearing insert. Bearing insert has smooth surface without any microrelief on its internal surface. Bearing is equipped with forced supply of lubricating material with metal cladding additives providing the formation of servovite, including copper film ~1…2 mcm thick between the bearing insert and external surface of steel bushing with regular microrelief.

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: machine building.

SUBSTANCE: on a steel plate of a bearing base arranged in an iron chill, the shape of the inner surface of which complies with the shape of a produced bearing, an antifriction alloy is applied by means of its extrusion. Preliminarily a layer of metal is applied onto the specified plate, producing oxides with a lower strength compared to strength of plate steel oxides. The anti-friction alloy is poured into an iron chill with a limited low melt temperature, and it is applied in a hardening manner by means of serial contact with the previously applied layer of metal to develop an adhesive link between them.

EFFECT: method provides for required strength of adhesion between coupled metals.

2 dwg

FIELD: machine building.

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EFFECT: invention allows enlarging the sprocket service life.

8 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: method includes shaping an insert model with ledges formed on a sheet from polytetrafluoroethylene (PTFE), matching with a sheet of coal plastic prepreg based on epoxide resin and winding of coal plastic prepreg onto the insert model, pressing and thermal treatment of matched components, and cutting of the PTFE sheet. Ledges on the polytetrafluoroethylene (PTFE) are shaped by milling of its surface in two directions at equal angles (30-45°) to the axis of coordinates, winding of coal plastic prepreg onto the insert model is carried out at the angle equal to the milling angle. Coal plastic is coal plastic containing a carbon tissue from carbon fibre with average size of crystallites along the basal plane 3.0-6.0 nm and thickness of basal plane package 1.0-4.0 nm and impregnating chlorine-containing polyglycidylarylenediamine resin.

EFFECT: simplified technology of bearing insert manufacturing.

4 cl, 2 dwg, 1 tbl, 6 ex

FIELD: process engineering.

SUBSTANCE: invention relates powder metallurgy, particularly, to plain bearings with steel base and sintered bronze material. Bearing comprises sintered compacted powder material of insert from copper-tin-bismuth allow and powder of the mix of metal compounds bonded with metal base of bearing insert. Said alloy includes copper-tin matrix with bismuth islands dispersed therein. Said mix of metal compounds features mean grain size smaller than 10 mcm and may include powder of Fe3P and MoSi2.

EFFECT: high wear resistance, durability and surface lubricity.

23 cl, 21 dwg, 12 tbl, 1 ex

Sleeve bearing // 2461744

FIELD: machine building.

SUBSTANCE: sleeve bearing comprises antifriction sleeve 5 with iner working surface, shaft 2 with recesses arranged regularly along the shaft circular cross-section to receive rollers. Antifriction sleeve 5 has additional outer working surface. Recesses are shaped to truncated cones with their bases located in friction zone.

EFFECT: stabilised surface layer microstructure of friction surfaces, longer life.

2 dwg

FIELD: transport.

SUBSTANCE: invention relates to rolling stock brakes. Parking brake drive comprises hollow housing, piston assembly, piston rod, piston rod lock, spring element, hydraulic fluid line, first elongated thread, ratchet gear, opening made axially in the latter, second thread made on axial hole surface, shaft and pawl. Parking brake comprises ratchet arranged on piston rod with brake drive thread to turn thereon, and pawl to be engaged with said pawl. Manual uncoupling gear for railway car parking brake comprises bracket, L-like cutout made in said bracket, elongated element of connection link, means for coupling second end of connection link with said brake drive, grip element and clamp means. Brake system comprises first and second spaced apart braking beams, first and second levers of force transfer, first and second force transfer means, and pusher rod. Parking brake manual uncoupler comprises valve arranged inside aforesaid hydraulic fluid line to communicate said brake with brake main line, and manual control means connected with said valve. Parking brake manual uncoupler comprises valve arranged inside aforesaid hydraulic fluid line to communicate said brake with brake main line, and manual control means connected with said valve. Valve inlet is directly communicated with brake main line.

EFFECT: improved operating performances, brake operation after pressure drop in brake main line.

30 cl, 13 dwg

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