80results about How to "Small thermal recession" patented technology

The invention discloses an automotive water-cooled disc brake, which comprises a water-cooled disc brake and a coolant circulation control system, wherein the coolant circulation control system comprises double radiators, a braking radiator and a coolant circulation control system for radiation of an engine radiator; an inner brake disc (39) and an outer brake disc (35) are connected into a split-type brake disc through a brake disc bolt (36); an outer seal spring (38) and an inner seal spring (49) are respectively welded and sealed with an outer cooling disk (37) and an inner cooling disk (40) alongin circumferences; an inner waterway baffle (50) and an outer waterway baffle (51) are respectively welded with the inner cooling disk (40) and the outer cooling disk (37) to form a waterway; a brake block friction plate (12) is fixed with a hollow brake block base plate (34) and a brake block cover plate (33) through a rivet (14); and the hollow brake block base plate (34) is provided with a waterway. The automotive water-cooled disc brake is used for replacing a common disc brake on an automobile, so that the heat stability of the disc brake is improved.

The embodiment of the invention discloses a modified phenolic resin. Phenolic resin is modified by adopting tung oil and nano particles, wherein the tung oil accounts for 10-15 wt% of the weight of the phenolic resin, and the nano particles account for 20-45 wt% of the weight of the phenolic resin. The thermal decomposition of the phenolic resin is remarkably increased by comprehensive modification on the phenolic resin, and a brake pad including the phenolic rein has stable braking performance and less heat fading during emergent braking at high speed. The invention also discloses a preparation process of the modified phenolic resin, a brake pad cementing agent, a preparation process thereof, and a brake pad using the brake pad cementing agent as a cementing agent.

The invention discloses a high-performance composite brake disc material, the wear resistant material comprises the following raw materials: bisphenol a novolac epoxy resin, diaminodiphenyl sulfone, hollow microspheres, a lubricant, a silane coupling agent, diamine, an imidazoles compound, an anti-oxidant, chloroprene rubber powder, alumina and reinforced fibers. The reinforced fibers can be a mixture of zylonite fiber, aramid fiber, cotton fiber and ramie fiber; the interface combination of fiber and particles in the materials is good, and the fiber and particles in the materials enable synergistic interaction with antimonony oxide and graphite, generation of thermal decomposition, heat attenuation and heat cracks phenomena can be effectively reduced, thermal conductivity of the materials is good, heat generated when brake friction is carried out can be timely radiated, brake disc surface temperature can be rapidly reduced, high temperature heat attenuation is reduced, hollow microspheres, the lubricant, the silane coupling agent and the enhance fiber are specific, friction coefficient of the wear resistant materials can be enhanced by intermolecular cooperation of the substances, and stability of the friction coefficient can be improved simultaneously.

The invention discloses a wear-resistant material for a brake block of a heavy duty automobile. The wear-resistant material comprises raw materials as follows: bisphenol A novolac epoxy resin, diaminodiphenyl sulfone, mineral powder, a lubricant, a cross-linking agent, chloroprene rubber powder, aluminum oxide, cotton fiber, carbon fiber, aramid fiber, sisal fiber, antimonous oxide, graphite and calcium lignosulfonate. The components are compatible, so that the overall performance of the wear-resistant material is effectively guaranteed, the components can make up for defects in performance mutually and can have high performance due to mutual restriction functions, problems of existing brake blocks are solved, high-speed decline and high-temperature decline can be well prevented, and the wear-resistant material has advantages of better stability and long service life.

The invention relates to a kind of automobile brake, which changes the present symmetric brake hoofs into the brake with four brake hoofs superposing; two brake cams match with the brake hoofs; the leading screw nut device drives the two brake cams. It is characterized in that the brake air chamber connects the brake base plate through the connecting base; one end of the connecting base connects the air chamber and the other end connects the brake base plate; a inside screw thread is in one joint end of the connecting base and the brake base plate, and the screw lead angle matching with the inside screw thread is bigger than the self-locking angle; one end of the leading screw connects the push pole on the connecting base through the driving device and the other end joints the brake cam. The invention effectively ensures the stability of the contacting areas of the brake assistants and the brake moment, and improves the comprehensive stability and cooling capability of the brake system.

The invention relates to a preparation method of a copper-based friction material of a brake pad. The preparation method comprises the following steps of step 1, preparing of raw materials; step 2, mixing and granulating; step 3, cold pressing and forming; step 4, preparing of steel back; step 5, cold assembly and matching; step 6, placing and charging into a furnace; step 7, hot pressing and sintering; step 8, discharging out of the furnace, and inspecting. The copper-based friction material has the advantages that by adopting the coarser flaky graphite, the dust pollution is reduced; by adding a compound anti-abrasion component, the comprehensive property of the friction material is favorably improved; by adding a certain ratio of glycerol mixed solution, rolling by hands, stirring and granulating, the uniformity and stability of each component are guaranteed, the fluidity is good, the density distribution of the press billet is uniform, and the strength of the prepared press billetis high; by adopting the high-temperature pressurizing sintering parameters, the property requirement of the friction material is guaranteed, and the connecting strength with the steel back is also guaranteed; the technology process is simple, the cost is low, the production efficiency is high, the brake noise is avoided, the heat attenuation is little, the bonding strength between the steel backand a friction block is high, and the comprehensive property is good.

The invention relates to a friction material composition, a high-speed train brake pad prepared from the same and an application of the friction material composition, wherein a copper-based friction material composition is prepared by adopting a powder metallurgy technology; the friction material composition is prepared from the following raw materials: a matrix component, a lubricating component,an anti-friction component and a friction stabilizing component; and a preparation method of the high-speed train brake pad comprises: burdening, mixing, briquetting and pressurized sintering. The brake pad prepared by using the preparation method is resistant to high temperature, little in heat fading, high and stable in friction coefficient, low in wear rate, low in heat damage and wear to thesurface of a counterpart and capable of prolonging the service life of a braking system and improving the reliability and economic efficiency of the braking system.

The invention relates to a manufacturing method of a friction material used on a drilling machine part and the drilling machine part, in particular to a non-asbestos brake shoe material for the drilling machine and a manufacturing method thereof. The components of the non-asbestos brake shoe material comprise a matrix material of rubber modified phenolic resin, a reinforcing fiber, a solid lubricant and a frictional behavior regulator and the like and are configured according to the following weight percentage: 10 percent to 20 percent of the modified phenolic resin, 17 percent to 50 percent of the reinforcing fiber, 3 percent to 6 percent of the solid lubricant, 40 percent to 61 percent of the frictional behavior regulator. The manufacturing method of the non-asbestos brake shoe material for the drilling machine is characterized by comprising the following steps of: (a) pre-processing the fiber, (b) stirring, (c) compressing and (d) post processing. The non-asbestos brake shoe material does not contain a high hardness abradant or steel wool, thus improving the defects of glass fiber, aramid fiber and aedelforsite fiber; and the abrasion resistance, heat fading property and other indexes of the brake shoe of the drilling machine are superior to the national standards.

The invention provides a non-asbestos wet-rolled automobile drum type brake block and a manufacturing method thereof. According to the manufacturing method of the drum type brake block, aluminum silicate, zinc powder, blanc fixe, needle-shaped wollastonite, compound graphite, cellulosic fibers, aramid fibers, steel fibers and phenolic resin are poured into a harrow type mixer to be mixed, liquid resin is added in the mixing process, the mixed materials are pulverized by a pulverizer and then are placed in shade places to be dried for 3-4 hours, the dried materials are then put into a hopper of a roller press to be rolled and then are conveyed into a cutting forming machine, the materials are coated with glue and then are adhered to the shoe of the brake block, conventional outer arc polishing, spraying, mark printing and accessory installation, riveting and packaging are carried out after heat treatment and cooling, and finally the brake block is formed. According to the non-asbestos wet-rolled automobile drum type brake block and the manufacturing method thereof, due to the fact that the liquid resin and the wet-rolling technique are applied, the work environment of workers is greatly improved, energy consumption is greatly reduced, environmental performance is good, and the brake block manufactured with the method is free of heat fading, stable in friction coefficient, good in friction performance, stable in braking, sensitive, reliable, and long in service life.

The invention relates to the technical field of friction materials, and discloses a nonmetal friction material for a vehicle disc brake and a preparation method and application thereof. The friction material comprises the following components in percentage by mass: 7-10% of binding agent, 15-25% of mineral fiber, 6-10% of inorganic fiber, 1.5-5% of organic fiber, 6-15% of calcium whisker, 12-20% of filler, 3-5% of friction powder, 6-8% of vermiculite powder, 15-26% of carbon friction reducing material, 6-15% of metal sulfide, 2-5% of tire powder, and 1-4% of molybdenum sulfide. The invention further discloses a preparation method of the friction material; and according to the method, the friction material is prepared through weighing, mixing, forming treatment and heat treatment process after formation. The friction material with higher friction coefficient, lower wear rate and excellent heat fade performance is prepared as a brake pad with high brake torque, comfortable emergent brake, short brake distance and lower heat fade.

The invention discloses a composite friction material by using a truck waste brake shoe friction material as a filler, relating to the technical fields of friction materials and vehicle brake shoes. The composite friction material comprises a resin matrix, a reinforcing fiber, a filler and assistants, wherein the resin matrix is a phenol formaldehyde resin, the filler is a truck waste brake shoe friction material, and the assistants comprise iron powder, an accelerator, molybdenum disulfide, stearic acid and graphite. The preparation method comprises the following steps: material preparation, stirring, compression molding and curing treatment. By utilizing the truck waste brake shoe friction material as the filler, combining the optimal selection and proportioning of the phenol formaldehyde resin, reinforcing fiber and other assistants and optimizing various parameters of the molding technique, the prepared composite friction material has the characteristics of stable friction factor, low heat fading, favorable thermal restorability, low wear rate and high carrying capacity, can be used for manufacturing multiple friction components, has excellent frictional wear performance, favorable bending strength and favorable impact toughness, and achieves favorable use effect.

The invention relates to a water jacket structure of a cylinder cover covering an exhaust manifold. The structure comprises a cylinder cover body, wherein an upper water jacket and a lower water jacket are arranged in the cylinder cover body. The structure is characterized in that four water filling holes sleeve the upper water jacket, four water inlets are formed on the lower water jacket, and the four water filling holes are in one-to-one correspondence to the four water inlets, respectively; the upper water jacket covers an exhaust duct of a first cylinder and a fourth cylinder as well as an exhaust collecting port of the first cylinder and the fourth cylinder; and the lower water jacket covers an exhaust duct of a second cylinder and a third cylinder as well as an exhaust collecting port of the second cylinder and the second cylinder. The structure provided by the invention can satisfy the cooling requirement of the cylinder cover and can inhibit gas and air retention during casting, the product yield is improved, and the structure has good manufacturability.

The invention belongs to the technical field of frictional materials and particularly relates to a preparation method of carbon fiber frictional particles. The preparation method comprises the following steps: by adopting water, a dispersant, chopped carbon fibers, micro inorganic powder and resin powder as raw materials, dissolving the dispersant, pouring the chopped carbon fibers, micro inorganic powder and resin powder into a mixing and kneading pot with a discharge screw, stirring and uniformly dispersing to form slurry; extruding and spreading out the slurry into a sheet, heating and drying, thereby obtaining a half-dry frictional material; mixing the half-drying frictional material into a sheet; continuously drying to obtain a sheet material; rolling and pressing the sheet material into mould plastic particles; and screening, grading and curing, thereby obtaining the carbon fiber frictional particles. The preparation method can be used for lowering the wear rate of the frictional material to a great extent, obtaining a porous high-damping composite material by utilizing fluffy structures of the carbon fibers and obtaining the frictional material with low abrasion, low hardness, no noises and low heat recession; besides, the preparation method is simple in process and capable of realizing dispersing the carbon fibers and soaking the resin very well.

The invention discloses an automobile brake pad, and relates to the technical field of automobile accessories. The automobile brake pad is prepared from the following raw materials in parts by weight: 15-25 parts of silicon nitride ceramic powder, 20-40 parts of silicon carbide fiber, 5-10 parts of ceramic bonding agent, 3-5 parts of phenolic resin, 5-10 parts of rubber powder, 5-10 parts of frication powder, 20-30 parts of filler, 2-5 parts of nano-silica, 5-8 parts of sintering aids and 1-3 parts of defoaming agent. Compared with the prior art, the automobile brake pad is high in strength, good in high temperature resistance, small in heat attenuation, stable in friction coefficient and less in abrasion.

The invention provides a synthetic friction material and a preparation method and application thereof. The synthetic friction material comprises the following components in percentage by mass: 8-10% of nitrile rubber, 0.9-3% of sulfur, 5-7% of boron modified phenolic resin, 10-14% of crystalline flake graphite, 8-10% of bauxite, 8-10% of wollastonite, 3-5% of diatomite, 6-7% of reduced iron powder, 12-15% of precipitated barium sulphate, 5-7% of pineapple leaf fibers, 6-8% of steel fibers, 2-4% of a coupling agent combination agent and 7-10% of inorganic mineral fibers. The sum of the mass percentages of all the components is 100%. The coupling agent combination agent comprises a silane coupling agent and an aluminate coupling agent. The invention further provides application of the synthetic friction material in synthetic friction materials for urban rail vehicles. The synthetic friction material provided by the invention has the advantages of environmental protection, high mechanical strength, low compression modulus, small dual wear, low abrasion and the like.

The invention relates to a vehicle brake control device. The vehicle brake control device comprises an angle sensor and an eddy current retarder excitation winding working sequence controller which is electrically connected with the angle sensor and an eddy current retarder, wherein the angle sensor comprises a rotating shaft and a shell; the rotating shaft and the shell are provided with angle sensing components respectively; the angle sensing components are used for measuring the angle change when the rotating shaft and the shell are rotated relative to each other; and the eddy current retarder excitation winding working sequence controller is a logic control circuit and is used for controlling the working state of the original eddy current retarder excitation winding working control circuit of a vehicle according to brake angle information transmitted by the angle sensor. The vehicle brake control device exerts the effect of the eddy current retarder completely, reduces the abrasion of a brake shoe of a main brake and the heat fading of the braking efficiency as far as possible, prolongs the working life of the eddy current retarder, has a simple structure and low price, is convenient to butt, and conforms to a driving operation habit.