696results about "Friction lining" patented technology

The invention relates to the technical field of friction materials, and particularly discloses an electromagnetic brake friction material prepared from granules and a preparation process of the electromagnetic brake friction material in order to solve the problem that an existing electromagnetic brake friction plate is difficult to prepare or insufficient in performance. The reinforcing material comprises plasma modified aramid pulp, coupling modified composite mineral fibers, SiO2 coated tetrapod-like zinc oxide whiskers and carbon fiber-aluminum silicon whiskers; the filler comprises modified needle-like wollastonite and organic modified precipitated barium sulfate; the adhesive comprises boron-silicon synergistic modified phenolic resin and modified carboxy nitrile rubber. The raw materials are improved, and granules are prepared by adopting a mixing and crushing process, so that the content of an adhesive can be greatly reduced, meanwhile, the die filling efficiency can be improved, the die thickness and the high-temperature heat fading of the friction material can be reduced, a cold press molding process can be omitted, and the qualification rate of finished friction materials can be improved.

The invention relates to the technical field of friction plates for vehicles, and particularly discloses a resin-based friction plate for an aluminum-ceramic brake disc and a preparation method of the resin-based friction plate for the aluminum-ceramic brake disc. Steel fibers serve as a main reinforcing phase, the structural strength of the material is improved, and meanwhile the steel fibers are good friction increasing materials; the reduced iron powder can improve the heat-conducting property of the brake pad and reduce the decline of the friction coefficient at high temperature; the red copper powder and the brass powder are good lubricants, the stability of single braking can be improved, and meanwhile abrasion is reduced; the silicon carbide mainly plays a role in increasing the high-temperature friction coefficient; molybdenum disulfide is beneficial for improving the recovery performance after high-temperature decline and reducing abrasion; antimony sulfide is lubricated at high temperature, and the friction coefficient in the decline stage is increased; silicon carbide is a high-hardness material, so that the friction coefficient is increased; the potassium magnesium titanate lamellar crystal improves the damping characteristic of the material and absorbs vibration and reduces noise, and the resin-based friction plate has the advantages of being high in strength, good in heat conduction, stable in friction performance, resistant to abrasion, comfortable in braking and the like and meets the use requirement of an aluminum ceramic brake disc.

A brake pad set (22) for disc brakes is shown, comprising an inner brake pad (24) and an outer brake pad (26). Each of the brake pads (22, 24) has a backing plate (28) and a brake lining (30, 32) attached to the backing plate (28), which comes into contact with a brake rotor during operation. The inner brake lining (30) and the outer brake lining (32) differ in size and preferably also in geometric shape in top view, wherein the wear volume of the inner brake pad (24) and the wear volume of the outer brake pad (26) differ by less than 10%. Furthermore, a vehicle brake (10) with such a brake pad set (22) is shown.

The invention discloses a mould pressing carbon ceramic brake disc and a preparation method and application thereof.The preparation method comprises the steps that continuous carbon fibers are chopped to obtain chopped carbon fibers, the chopped carbon fibers are mixed, resin glue liquid is sprayed while mixing is conducted, glue-coated carbon fibers are obtained, silicon-containing particles and auxiliaries are mixed to obtain mixed powder A, then the mixed powder A and resin powder are mixed to obtain mixed powder B, and the mixed powder B is added to the mould pressing carbon ceramic brake disc; and mixing the mixed powder B with the glue-coated carbon fibers to obtain a mixture, carrying out compression molding on the mixture to obtain a preform, carbonizing the preform to obtain a porous body, and siliconizing the porous body to obtain the composite material. According to the preparation method disclosed by the invention, the surface of the carbon fiber is treated by spraying a resin glue solution for the first time, a uniform protective layer is formed on the surface layer of the carbon fiber yarn, and an auxiliary agent is added into a mixture, so that a uniform capillary tube is formed when a preform is carbonized, the infiltration uniformity is promoted, and the uniformity of components, high density and low aperture ratio are ensured; therefore, the prepared molded carbon-ceramic brake disc is stable in performance, high in strength and resistant to high temperature.

The invention relates to the technical field of brake pads, in particular to a brake pad capable of reducing abrasion of a brake disc and a preparation technology thereof.The brake pad comprises, by weight, 20%-32% of reinforcing fibers, 12%-18% of a binder, 22%-34% of a friction regulator and 24%-38% of filler and functional additives, the reinforced fibers are at least one of titanium carbide coated carbon fibers, steel fibers and aluminum silicate ceramic fibers. According to the invention, the reinforced fibers construct a high-strength heat conduction network, and heat is quickly dispersed to reduce thermal stress concentration; the binder ensures the structural stability at high temperature; the friction regulator optimizes a friction coefficient curve through the synergistic effect of lubrication and friction increasing, and high-temperature fluctuation is avoided; the filler and the functional additive enhance the heat absorption and buffering capability, and adjust pores to relieve thermal shock. All the components have a synergistic effect, so that hot cracks of the brake disc can be reduced, and the crack resistance and the brake stability under extreme working conditions are improved.

Apparatus (1) for the heat treatment of articles, comprising a longitudinal casing (2), a convection tunnel furnace (3) positioned longitudinally within the casing (2) comprising a circuit for the production and forced circulation of hot air through said furnace (3), a plurality of stackable trays (4) where the articles can be housed, a conveyor (50) configured to transport at least one row of stacks of the stackable trays (4) through the furnace (3), a first thermal stabilization chamber (51) for the stacks of trays (4) with the articles to be treated communicating with an entrance door (31) of the furnace (3) and a second thermal stabilization chamber (52) for the stacks of trays (4) with the treated articles communicating with an exit door (32) of the furnace (3), comprising means for forced air suction (200) at least from the second thermal stabilization chamber (52) and means for recovery and introduction (210) of the suctioned air inside the furnace (3).

The invention discloses a powder metallurgy brake shoe for a locomotive and a preparation method, and relates to the technical field of metallurgy brake shoes, the powder metallurgy brake shoe comprises the following raw materials by mass percentage: 50%-70% of a matrix component, 10%-18% of a reinforcing component, 10%-16% of a lubricating component and 10%-16% of a friction component; the matrix component comprises electrolytic copper powder; the reinforcing components comprise reduced iron powder, superfine iron powder, atomized nickel powder, molybdenum powder and zinc powder; the lubricating component comprises artificial graphite and sulfide. According to the invention, the performance reduction of the brake shoe and the decline of a matrix at high temperature are effectively inhibited, the stability of a friction coefficient is kept, the abrasion is reduced, and the service life is prolonged.

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 brake unit for a wind turbine is provided. The brake unit can include a mounting ring configured to couple the brake unit with the wind turbine, a piston movably coupled with the mounting ring such that an upper portion of the piston is positioned and located proximate to the mounting ring, a lining coupled with the piston, wherein the lining is positioned and located adjacent to an opposing end of the piston from the mounting ring, and a gap positioned between a first component of the brake unit and a second component of the brake unit, wherein the gap is configured to indicate a thickness of the lining.

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.

The invention discloses a composite friction material and preparation and application thereof in brake pads, the composite friction material takes phenolic resin as a matrix, and modified barium sulfate and red copper fiber are dispersed in the matrix; the modified barium sulfate is composed of barium sulfate particles and a coating layer on the surfaces of the barium sulfate particles, that is, the modified barium sulfate has a core-shell structure, and the coating layer comprises a UiO-66 metal organic framework material. Compared with the existing pure phenolic resin and a composite material only added with common barium sulfate particles, the composite friction material provided by the invention has remarkable advantages in the aspects of friction coefficient, thermal stability and wear resistance by introducing the modified barium sulfate, can reduce friction noise, and is suitable for being used as a brake pad material.

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.

A bonding material and a preparation method therefor, and a brake pad and a manufacturing method therefor. The bonding material comprises a resin material and filling particles, wherein the filling particles at least partially fill the resin material.

The invention discloses a friction material for brake pads and application thereof and belongs to the technical field of friction materials. The composite material is prepared from the following components in percentage by weight: 15 to 20 percent of composite fiber of chopped carbon fiber and ceramic fiber, 1 to 3 percent of carboxylation modified multi-walled carbon nanotube, 8 to 12 percent of polyimide modified phenolic resin, 0.5 to 1 percent of silane coupling agent KH-550, 5 to 8 percent of bionic multilayer graphene capsule, 3 to 5 percent of rare earth doped molybdenum silicide composite material, 8 to 12 percent of scaly soft iron powder and 10 to 15 percent of thermoelectric regulation type ZrO-BeO composite material. The catalyst comprises the following components in percentage by weight: 2-4% of porous molecular sieve loaded nano SbO, 5-10% of composite alkaline earth metal oxide, 5-10% of a shaped phase change material and 0.1-0.5% of a high-thermal-conductivity silicon carbide coating, a micron-sized through channel network with a high-thermal-conductivity silicon carbide coating is constructed in the material, and a shaping phase change material is combined, so that a multi-stage synergistic heat management mechanism of conduction heat dissipation, phase change heat storage and capillary flow enhanced heat dissipation is formed, friction heat can be quickly guided out from the surface and uniformly dispersed, and local high temperature and thermal stress are greatly relieved.

A brake lining (3, 130, 230) for a radially actuatable drum brake (1) of a utility vehicle has a lining support (32, 132, 232), at least one friction lining (31, 131, 231), said friction lining being provided on the lining support (32, 132, 232) and having a friction surface which is convex in the shape of a circular arc segment in the circumferential direction, and a pressure piece (7, 170, 270) which is secured to the lining support (32, 132, 232), said pressure piece (7, 170, 270) being positively and / or frictionally held in the radial direction with the aid of at least one holding element. The invention also relates to a drum brake.

The invention relates to a method for producing a brake disc (10), in which (V1) a base body (12) for the brake disc (10) is coated with a coating (14) made of a hard material, and subsequently (V2) the roughness of the coating (14) is reduced by a non-abrasive press forming process, in which at least one recess (24) is introduced into the coating (14) during the process, the groove (24) acts as an indicator for wear of the coating (14) of the brake disc (10).

A method for manufacturing a brake disk, comprising: providing a substrate (12) of a brake disk, the substrate (12) being made of a graphite-containing metallic material, the substrate (12) defining a surface (13, 13'); depositing a metal-based coating layer onto the surface (13, 13') of the substrate (12) by applying a laser cladding deposition process in which powder is deposited onto the surface (13, 13') while a laser beam is radiated onto the surface (13, 13'), wherein the powder is delivered from a powder nozzle coupled to the laser head from which the laser beam is radiated, so that the powder being delivered and the laser beam move jointly over the surface to be coated as the laser head moves, wherein the diameter of a laser spot applied on the surface by the laser beam is greater than the diameter of a powder spot deposited on the surface from the powder nozzle, and the axis of the laser spot applied on the surface is misaligned with respect to the axis of the powder spot delivered to the surface.

The brake lining for the railway vehicle comprises a back plate used for being connected with the vehicle, a first groove is formed in the side wall of the back plate, a friction plate made of non-asbestos organic materials is fixedly connected to the side wall of the back plate, the corners of the friction plate are subjected to chamfering treatment, and the first groove is formed in the side wall of the back plate. Scale marks are fixedly connected to the side wall of the friction plate, a cross-shaped groove is formed in the friction plate, the friction plate is arranged, the friction plate is made of non-asbestos organic materials, the friction coefficient of the non-asbestos organic materials is low, aggressiveness to a brake disc is smaller, braking noise can be remarkably reduced, and the service life of the brake disc is prolonged. The friction plate is subjected to straight chamfering treatment, the noise performance under the cold-state working condition can be improved, the cross-shaped groove is formed in the upper end of the friction plate, and the braking noise can be further reduced by increasing the heat dissipation area of the friction face and improving the stability of the friction film through the design of the cross-shaped groove.

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 utility model relates to the technical field of brake pads, in particular to a ceramic wear-resistant brake pad which comprises a metal installation sheet, a first installation groove is formed in the upper surface of the metal installation sheet, a plurality of heat dissipation grooves are formed in the upper surface of the metal installation sheet, the section of each heat dissipation groove is in an arc shape, and a plurality of sets of anti-skid lines do not extend out of the edge of a ceramic sheet. The section of the arc-shaped groove is in an arc shape, high-temperature-resistant sound-absorbing cotton is arranged in the second mounting groove, and a plurality of connecting through holes are formed in the lower inner walls of the first mounting grooves. The second mounting groove is formed in the lower surface of the metal mounting piece, the high-temperature-resistant sound-absorbing cotton is arranged in the second mounting groove, noise is absorbed by the high-temperature-resistant sound-absorbing cotton through the connecting through hole formed in the lower inner wall of the heat dissipation groove, and the noise reduction function of the brake pad is achieved; meanwhile, no noise reduction groove is formed in the ceramic chip, the strength of the ceramic chip is not affected, and the ceramic chip is prevented from being broken.

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 brake pad of the automobile brake system comprises a plurality of storage holes formed in the brake pad, the storage holes are vertically formed from the surface, close to a brake disc, of the brake pad to the interior of the brake pad, and each storage hole sequentially comprises a circular truncated cone storage part, a cylindrical storage part and a conical storage part which are communicated with one another; the upper bottom surface of the circular truncated cone storage part is arranged on the surface, close to the brake disc, of the brake pad, and the two ends of the cylindrical storage part are communicated with the lower bottom surface of the circular truncated cone storage part and the bottom surface of the conical storage part respectively. The storage hole structure formed by compounding the circular truncated cone storage part, the cylindrical storage part and the conical storage part is arranged on the surface of the brake pad, so that the trapping and coagulation efficiency of brake wear particles is effectively improved, and the emission level of micron-scale and nano-scale particles is remarkably reduced; the particle containing and heat management performance of a friction interface in different braking stages is improved, and meanwhile the abrasion resistance and braking stability of the surface of the brake pad are enhanced.

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).