370results about "Friction lining" patented technology

A brake disc for a disc brake may have a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The disc is provided with a base layer constituted by steel having a nickel content of at most 15% which covers at least one of the two braking surfaces of the braking band.

The embodiment of the invention provides a friction material composition, a brake lining, a preparation method of the brake lining, a brake and a vehicle. The friction material composition comprises the following raw materials in parts by weight: 2-10 parts of a fluoride mixture, 8-15 parts of graphite, 8-12 parts of phenolic resin, 4-12 parts of a metal oxide, 15-40 parts of a fiber material and 20-40 parts of other fillers, wherein the fluoride mixture comprises at least two of calcium fluoride, barium fluoride, cerium fluoride, aluminum fluoride, magnesium fluoride, potassium fluoride, sodium fluoride, beryllium fluoride and manganese fluoride. The brake lining prepared from the friction material composition can solve the problems of high wear rate and heat fading at the same time, the service life of the brake lining is prolonged, and the braking effect is improved.

A method for forming an oxidation protection system on a carbon-carbon composite structure can comprise applying a boron slurry to the carbon-carbon composite structure, wherein the boron slurry comprises a boron compound, a first glass mixture, a first glass former, a first glass modifier, and a first carrier fluid, the first glass mixture including a first glass compound and a second glass compound, the first glass compound having a first viscosity-temperature profile that is at least one order of magnitude below a second viscosity-temperature profile of the second glass compound; applying a silicon slurry to the carbon-carbon composite structure, wherein the silicon slurry comprises a silicon compound, a third glass compound, a second glass former, a second glass modifier, and a second carrier fluid; and heating the carbon-carbon composite structure.

To provide a friction material that exhibits superior wear resistance and fade resistance under high load conditions, among other frictional performance characteristics. [Solution] A friction material comprising a fibrous base material, a friction modifier, and a binder, wherein the copper content is 0.5% by mass or less in terms of copper element, the fibrous base material contains steel fibers, the steel fiber content is more than 20% by mass and less than 50% by mass, and the friction modifier contains titanium carbide powder.

The invention relates to a brake element carrier body having a metallic main body, wherein a surface of the main body is at least partially, preferably completely, coated with an alloy, the alloy being diffused into the main body in a diffusion zone. This alloy is specified in advantageous embodiments.

This application relates to the field of brake friction material technology, specifically disclosing a brake pad compound, a synthetic brake pad, its preparation method, and its application. The brake pad compound provided in this application comprises the following components in parts by weight: 10-13 parts liquid nitrile rubber, 8-12 parts modified phenolic resin, 20-40 parts reinforcing fiber, 8-12 parts calcium hydroxide, 1-3 parts light magnesium oxide, 10-15 parts calcium carbonate whiskers, 2-5 parts calcined alumina, 10-15 parts graphite, 5-10 parts heavy calcium carbonate, 0.8-1.2 parts sulfur, and 0.8-1.2 parts accelerator; the reinforcing fiber comprises steel fiber, aramid fiber, and mineral fiber in a weight ratio of (10-25):1:(5-15). The brake pad compound and the method for preparing the synthetic brake pad provided in this application can produce synthetic brake pads with good frictional stability and small batch-to-batch variations, resulting in high safety and reliability when used in traffic vehicle braking systems.

The application discloses a kind of carbon ceramic brake pad for grinding carbon ceramic brake disc, belong to brake pad technical field, solve the poor heat dissipation performance of existing ceramic brake pad, insufficient connection strength, leading to the problem of poor friction performance, it includes carbon ceramic lining plate and the carbon ceramic friction surface installed on carbon ceramic lining plate, multiple mortise grooves are set on the upper surface of carbon ceramic lining plate, multiple tenon heads matched with mortise groove are set on the lower surface of carbon ceramic friction surface, tenon head is embedded into mortise groove and forms mortise and tenon structure, connects carbon ceramic lining plate and carbon ceramic friction surface, ear plate is set on the circumference of carbon ceramic lining plate, and mounting hole is formed in ear plate;In the application, the friction coefficient is adjusted by designing ceramic phase composition and density of carbon ceramic friction surface and carbon ceramic lining plate, and carbon ceramic lining plate and carbon ceramic friction surface are connected by RMI process and mortise and tenon structure to improve the mechanical properties of connecting place, ensure braking safety, reduce thermal stress generated in braking process, so as to improve the friction performance, effectively guarantee braking effect, and prolong service life.

The mechanical double-leading and double-trailing drum brake comprises a brake drum, a brake bottom plate and two sets of brake units, the two sets of brake units are oppositely installed on the front face of the brake bottom plate in a left-right mode, and each brake unit comprises a leading brake shoe block, a trailing brake shoe block and a rotating cam arranged between the leading brake shoe block and the trailing brake shoe block. The two rotating cams are connected with the same connecting rod arranged on the back face of the brake bottom plate. The brake drum is uniformly stressed by taking the leading shoe block and the trailing shoe block as central symmetry with the circle center of the brake bottom plate, so that the brake drum and a hub bearing are protected from being damaged or even damaged by deflection force, and the service life of the brake drum and the hub bearing is greatly prolonged; and in addition, due to the arrangement of the double-leading double-trailing four-shoe block, the service life of the drum brake is prolonged, the friction force is uniform, the braking effect is better, the personal safety of a driver is ensured, and the braking is safer and more reliable.

The invention belongs to the technical field of brake friction materials and powder metallurgy, and discloses a preparation and regulation method for a three-dimensional latticed structure in a copper-based brake friction material. The copper-based brake friction material is mainly composed of copper-coated iron powder, molybdenum disulfide, crystalline flake graphite, silicon dioxide, superfine copper powder and other functional components. Wherein the three-dimensional latticed structure is constructed by superfine copper powder, and the comprehensive performance of the copper-based brake friction material is improved through multiple excellent performances such as high heat conduction performance and mechanical strength of the three-dimensional latticed structure; according to the invention, structural design and preparation are carried out on raw material powder by adopting a method of prefabricated particle preparation and particle bonding and coating, so that all functional components are uniformly distributed on the friction material, a three-dimensional latticed structure can be constructed, and the mechanical property and tribological property of the friction material are greatly improved; the copper-based brake friction material is high in mechanical performance, stable in friction coefficient, high in heat conduction performance, low in wear rate and excellent in performance under extreme working conditions.

The present disclosure relates to a friction material, a preparation method therefor, and a friction part. The friction material contains the following components by weight percentage: 24%-31% of a nitrile rubber, 0.35%-1% of a vulcanizing agent, 0.35%-0.6% of a vulcanization activator, 0.4%-0.8% of a promoter, 0.06%-0.11% of a scorch inhibitor, 1.5%-2.4% of ZnO, 24%-31% of a thermoplastic phenolic resin, 1.5%-2.2% of a plasticizer and 15%-25% of white carbon black, and optionally: 0%-25% of a filler, 0-0.8% of an anti-aging agent, and 0-2.4% of MgO. The friction material according to the present disclosure and the products made of the friction material have advantages such as excellent performance, low cost, long service life and wide application range.

The utility model relates to a friction plate with a riveting structure, which belongs to the technical field of clutch brake structures and comprises a core plate steel sheet, an assembly inner ring is arranged in the center of the core plate steel sheet, reinforcing sheets are arranged on two sides of the core plate steel sheet, paper-based linings bonded with the end face of the core plate steel sheet are arranged on the peripheries of the reinforcing sheets, and the paper-based linings are arranged on the periphery of the core plate steel sheet. An inner gear ring communicated with the assembling inner ring is arranged in the center of the reinforcing piece, a plurality of rivet holes distributed annularly are formed in the reinforcing piece and the core plate steel piece, and rivets for fixedly connecting the reinforcing piece and the core plate steel piece are arranged in the rivet holes. The core plate steel sheet is located in the center of the friction plate and provided with an assembly inner ring, and the reinforcing sheet is provided with an inner gear ring used for being connected with a clutch driven disc. The connection strength of the friction plate and the driven disc is enhanced, and the stability of power transmission is ensured. And by optimizing riveting and heat dissipation structures, the service life and performance of the clutch are improved. Efficient heat dissipation, high-strength connection and long service life of the friction plate are achieved.

The utility model relates to the technical field of automobile brake discs, and provides an automobile brake disc assembly which comprises a friction disc, a joint, a plurality of torque transmission pins and a plurality of bolts, a heat insulation gasket is arranged between the friction disc and the joint, and the torque transmission pins are sequentially connected with the joint, the heat insulation gasket and the friction disc in an inserted mode. A pressing cap of the torque transmission pin abuts against the surface of the combining head, the bolt penetrates through the torque transmission pin, a nut of the bolt abuts against the end face of the pressing cap of the torque transmission pin, and a nut of the bolt abuts against the surface of the friction disc. The heat insulation gasket is arranged between the friction disc and the joint, so that heat directly conducted to the joint is effectively reduced, and a certain protection effect on the joint is achieved.

The present invention relates to a brake disc for a disc brake, and in particular, comprises two opposing brake surfaces (2a, 2b), each brake surface including a brake band (2) defining at least one of two main surfaces of the disc (1). The brake band (2) is made of gray cast iron or steel, preferably stainless steel. The brake disc includes a surface coating (3) covering at least one of the two brake surfaces of the brake band. The brake band (2), which at least partially defines one of the two main surfaces of the disc (1), is made of gray cast iron or steel, preferably stainless steel. The disc consists of a surface coating (3) covering at least one of the two brake surfaces of the brake band. The surface coating (3) is based on a mixture of one or more aluminum oxides and one or more titanium oxides, and the surface coating (3) is darker in color than the steel or gray cast iron of the brake band (2).

A friction material with reduced storage time is described, comprising a binder composition based on a hydraulic binder and its use in brake pads and industrial applications.

The utility model discloses a light friction plate structure based on a parking brake shoe assembly, which comprises a friction plate body, the friction plate body comprises a friction layer and a back plate, lightening holes are arranged on the surface of the back plate, and a heat dissipation channel is arranged inside the friction layer. According to the light friction plate structure based on the parking brake shoe assembly, the multiple sets of lightening holes are formed in the back plate, and the back plate is made of light aluminum alloy materials, so that the overall weight of the friction plate can be effectively reduced, the requirement for light-weight design of an automobile is met, fuel consumption of the automobile is reduced, and the purposes of energy conservation and emission reduction are achieved; and the heat dissipation channels formed in the friction layer are communicated with the lightening holes in the back plate, so that a good heat dissipation path is formed, the heat dissipation speed of the friction plate is increased, performance reduction of the friction plate caused by high temperature can be effectively avoided, the braking performance of the friction plate is improved, the service life of the friction plate is prolonged, and the parking braking safety of an automobile is enhanced.

The present invention relates to the field of carbon-ceramic composite materials, in particular to a non-dense carbon-ceramic friction material, and a preparation method therefor and the use thereof. The non-dense carbon-ceramic friction material is obtained by subjecting a C / C-Si green body to a silicon infiltration treatment using silicon powder. The raw materials for preparing the C / C-Si green body comprise chopped carbon fibers, graphite powder, a ferrosilicon mixture, silicon carbide powder, boron nitride powder, and phenolic resin powder. The non-dense carbon-ceramic friction material is made to have a porosity of 15-25 vol.%, a high-temperature resistance limit of 1350°C and a compressive strength of 80.5 ± 2.4  MPa; therefore, a friction plate prepared therefrom exhibits a wear amount of 52.8-95.0  μm and a friction coefficient of 0.6-0.7 in an AK master program test. Compared with friction materials in the prior art, the non-dense carbon-ceramic friction material has the advantages of a non-dense structure, a light weight, high-temperature resistance, etc.

A brake disk or drum has at least one working surface which opposes a braking member such as a brake pad or shoe. A plurality of spaced, raised island formations are provided across the working surface, with channels extending between the island formations. Each raised island formation has an outer surface which contacts a brake pad or brake shoe during braking.

To provide a friction pair having an excellent stability of a braking effect and wear resistance of a friction material, where the friction pair is consisting of a disc brake pad having a friction material manufactured from a friction material composition containing a binder, a fiber base material, and a friction modifier, but not containing a copper component and a ferrous-base metallic fiber, and a stainless steel disc rotor. The present invention uses a friction material composition that does not contain a metallic fiber other than a ferrous-base metallic fiber but contains 10-15 wt % of a carbonaceous lubricant as a friction modifier relative to an entire friction material composition, and 15-30 wt % of an inorganic friction modifier with Mohs hardness of 6 or more relative to the entire friction material composition, where a thermal conductivity of the friction material is 1.2-3.0W / m·K.

A method is provided for refurbishing a C / C disk of a first thickness and coated with a first ceramic solution for a second life. The method includes machining the C / C disk of the first thickness to remove a coating of the first ceramic solution from the wear surfaces of the C / C disk of the first thickness. Removing the coating of the first ceramic solution further removes a portion of the C / C disk thereby forming a C / C disk of a second thickness. The second thickness is less than the first thickness. The method further includes coating the wear surfaces of the C / C disk of the second thickness with a second ceramic solution, thereby forming a C / C disk of the second thickness coated with the second ceramic solution. Additionally, the method includes drying the C / C disk of the second thickness coated with the second ceramic solution.

A method for forming an oxidation protection system on a composite structure may comprise applying a ceramic layer slurry to the composite structure and heating the composite structure to form a ceramic layer on the composite structure. The ceramic layer slurry may comprise aluminum and silicon carbide powder in a sol. The ceramic layer may comprise alumina, silicon carbide and silicon oxycarbide.

Friction unit (100) for a disc brake (300) of a vehicle, comprising: a support plate (1); and a friction lining (2) with a friction material layer (21) having a contact surface (21a) for contacting a disc (310) and a backing layer (22) having an inner surface (22a) oriented opposite to the contact surface (21a) and connected to the carrier plate (1), wherein the underlay layer (22) has at least one slot (3) which is formed in the inner surface (22a) and forms a cavity, wherein the underlay layer (22) has a predetermined thickness (t22), and wherein the at least one slot (3) has a depth (d3) which is less than the thickness (t22) of the underlay layer (22).

The utility model discloses an automobile brake pad convenient to install, which relates to the technical field of automobile parts and comprises an installation fixing plate, a bonding layer is bonded on one side of the outer surface of the installation fixing plate, a brake pad skin is bonded on one side of the bonding layer, and a connecting assembly is arranged on the upper portion of the outer surface of the installation fixing plate. And a clamping assembly is arranged on one side of the outer surface of the mounting fixing plate. According to the automobile brake pad, the clamping assembly is arranged, when the installation fixing plate and the brake pad skin are installed, the installation fixing plate and the fixing cylinder slide to the installation frame, in the sliding process, the clamping head is extruded, so that the compression spring is extruded, the compression spring deforms due to extrusion, and therefore reset elastic force is generated; the clamping head is pushed reversely, so that when the mounting fixing plate slides to the mounting position, the clamping head is temporarily fixed under the action of reset elastic force generated by the compression spring, subsequent mounting of the brake pad skin is facilitated, and the mounting effect is improved.

A carbon-ceramic brake disc and a manufacturing method therefor, and a vehicle. The carbon-ceramic brake disc comprises long fiber layers and a short fiber layer; the long fiber layers are arranged on the two opposite sides of the short fiber layer; the fiber length S2 of the long fiber layers is greater than or equal to 60 mm, and the fiber length S1 of the short fiber layer is less than or equal to 30 mm.

The present invention relates to a molding material including an inner layer made of a carbon-based material and respective outer layers made of a carbon ceramic material composed of carbon and silicon carbide. Preferably, the molding material is molded to form a disk brake disk.

A method includes forming a crystallized metal carbide undercoat on a surface of a carbon-carbon composite substrate. The method further includes forming an overcoat on a surface of the undercoat. The overcoat includes a plurality of crystallized ultra-high melting point overcoat layers. Each overcoat layer is sequentially formed by applying a mixture to a surface of an underlying layer and heating the mixture. The mixture includes a plurality of ultra-high melting point refractory ceramic particles and a pre-ceramic polymer. The mixture is heated to a heat treatment temperature to pyrolyze the pre-ceramic polymer and form the overcoat layer in an inert atmosphere or under vacuum. As a result, the overcoat layer includes a crystallized ultra-high melting point polymer-derived ceramic matrix that includes the plurality of ultra-high melting point refractory ceramic particles.

The invention relates to a method for the localized heat treatment of an aircraft brake disk (1) based on carbon-carbon composite, the disk (1) being provided with two friction faces each located on one side of the disk (1), the method being characterized in that it comprises: - placing an electrode (11), on each side of the disk (1), in electrical contact with a region to be treated (17) of the disk (1), an electrical insulator (14) being arranged on at least one friction face, in a vicinity of the region to be treated (17); and - generating an electric current between the two electrodes (11) so as to heat the region to be treated (17) by Joule heating.

This invention is based on [Formula I]Fe 2-a Zn a S b The present invention relates to a composition having the formula (wherein a is a number in the range of 0.2 ≤ a ≤ 1.8, b is a number in the range of 1.8 ≤ b ≤ 2.2, preferably in the range of 1.9 ≤ b ≤ 2.1, most preferably b = 2, a means the molar ratio of Zn in the overall composition, and b means the molar ratio of S in the overall composition), wherein the composition contains, as a lubricant, at least two different mixed crystalline phases of Fe, Zn, and S, as determined herein.

Arrangement for a disc brake (1), comprising one or more brake pads (3a, 3b) and a brake disc (2), wherein the at least one brake pad (3a, 3b) has a pad carrier plate (4a, 4b) and a pad body (5a, 5b), wherein the at least one brake pad (3a, 3b) is configured and connected to a compressed air source such that compressed air can be forced through it onto the brake disc (2) in order to release it from the brake disc (2) when the disc brake is released during / after braking, wherein the at least one brake pad (3a, 3b) has at least one first opening (7a, 7b) or several such openings through which compressed air is directed onto the brake disc (2) when the disc brake (1) is released, and wherein the at least one opening (7a, 7b) is designed as a channel (8a, 8b, 12a) which is defined by the pad carrier plate (4a, 4b) and the pad body (5a, 5b) extends through and is connected by a hose ora pipe section is formed which is placed as a separate component on or in the brake pad (3a, 3b), wherein the separate component which forms the channel (8a, 8b, 12a) is made of a material which wears down together with the pad body (5a, 5b) during braking, characterized in that the channel (12a) widens in the direction of application of the brake pad (3a, 3b) in the pad body (5a, 5b) to a cavity (13) which, in conjunction with the brake disc (2) and the pressurization of the channel (12a) or the cavity (13) with compressed air, becomes a chamber of an aerostatic air bearing.

Multi-plate brake or multi-plate clutch (20) with external lubrication by means of a nozzle (45), wherein the plates have shark fin-shaped friction segments (42) which are spaced apart from one another by means of segmentation grooves (15). Drag grooves (17) in the form of recesses are formed on the outer edge of the carrier disk of the plate.