32results about How to "High coefficient of kinetic friction" patented technology

The disclosure relates to a spectacle lens comprising: a lens base member; a multi-layered anti-reflection film placed on the lens base member, and including a layer mainly made of silicon dioxide as an outermost layer; and a water-and-oil repellent layer provided in contact with the outermost layer of the multi-layered anti-reflection film, and made by using, as raw materials: at least one kind of a first fluorine-substituted alkyl group-containing organosilicon compound and a second fluorine-substituted alkyl group-containing organosilicon compound. The disclosure also relates to methods of producing a spectacle lens that is capable of retaining a sufficient water-and-oil repellency over an extended period, and having sufficient edge processability.

A multi-disc friction clutch includes a main shaft with a first pressure oil duct and a first piston and a first friction pair, which are arranged side by side. The cylinder body includes the main body of the cylinder body and a first canister body connected with one side of the main body of the cylinder body. The interference fit occurs between the main shaft and the main body of the cylinder body. The circumference of the main body of the cylinder body is provided with a gear ring. The first piston and the first friction pair are arranged in the space enclosed by the main body of the cylinder body and the first canister body. The first friction pair consists of a paper-based friction plate, dual sheet steel and a wave spring, wherein, the paper-based friction plate has a splined connection with the extension section with a first gear and the dual sheet steel has the splined connection with the cylinder body. The invention adopts the paper-based friction plate, the dynamic friction coefficient of which is one time higher than the dynamic friction coefficient of a copper-based plate. The characteristic makes the paper-based plate has a higher bearing capacity than the copper-based plate. When the same torque is transmitted, with the paper-based plate, the structural size of the clutch can be obviously reduced. The invention has the interference connection between the main shaft and the cylinder body in order that enough working torque can be transmitted with less radial structure.

A wet copper-based powder metallurgy friction plate and its manufacturing method. The friction plate is mainly composed of a steel core plate in the middle and a friction layer on at least one side, and a layer of adhesive film is bonded to at least one side of the steel core plate , and a layer of friction layer is compounded on the adhesive film layer; the manufacturing method at least includes friction layer batching, mixing, pressing, sintering, assembling with steel core plate, oil tank processing, and is characterized in that the sintering adopts Pressureless sintering in a continuous sintering furnace. The sintered friction layer is dipped in a vacuum dipping tank at room temperature and dried, and then spliced ​​with the steel core plate. Before splicing, the surface of the steel core plate is coated with glue ; After splicing, it is made by pressurizing and curing on a flat vulcanizing machine; it has the characteristics of high processing efficiency, low cost, increased hardness and strength, and high dimensional accuracy.

The invention relates to the technical field of ceramic friction materials, particularly a ceramic friction material mixture and a mixing method thereof. Silicon dioxide, molybdenum disulfide, diesel, manganese carbonate ore, phosphorite, graphite, diatomite, ceramic fibers, carbon fibers, a phenolic resin and sodium dodecyl benzene sulfonate used as raw materials are selected and proportioned to prepare the ceramic friction material. The kinetic friction coefficient of the ceramic friction plate prepared from the ceramic friction material is 0.22-0.23, the static friction coefficient is 0.24-0.25, the kinetic / static friction ratio is 0.88-0.955, and the wear rate is 7.5*10<-6>mm<3>.J<-1>-9*10<-6>mm<3>.J<-1>. By combining the raw material proportioning and adding the manganese carbonate ore and phosphorite, the properties of the ceramic friction material mixture are improved, so that the frictional properties (especially stability, oil conductivity and physical and mechanical properties) of the ceramic friction material are improved.

A paper-based friction material and a method for making a friction plate. The paper-based friction material uses fibers as a skeleton, resin as a matrix, various oxides and graphite as fillers, organic friction powder and rubber as regulators, and is produced by pulping and papermaking. , drying, impregnated with resin, cured, pasted on the steel core plate, and then heat-treated and machined to make a paper-based friction plate. It has a high coefficient of dynamic friction, close to the coefficient of dynamic and static friction, smooth and soft joints, and does not damage the couple. It has the characteristics of stable braking, low noise, strong torque transmission capacity, no environmental pollution, simple manufacturing process, and low manufacturing cost.

The invention discloses a friction damper with a gap with additional rigidity, which comprises an outer cover steel plate, a friction plate, an I-shaped plate, a rectangular steel sheet, a one-shaped plate, a U-shaped plate, and high-strength friction bolts. Among them, the outer cover steel plate, the I-shaped plate, the rectangular steel sheet, the one-shaped plate, and the U-shaped plate are stacked sequentially from top to bottom and symmetrically distributed around the one-shaped plate and the U-shaped plate. The outer cover steel plate, the outer rectangular steel sheet and the U-shaped plate are fixed by the outer friction high-strength bolts; the friction plate, the inner rectangular steel sheet, and the one-shaped plate are fixed by the inner friction high-strength bolts. The I-shaped board is placed on the upper and lower sides of the one-shaped board and the U-shaped board. Compared with the traditional friction damper, the I-shaped plate is subjected to tension during loading, which provides another defense line for energy consumption and can increase the rigidity of the main structure and improve the anti-seismic performance of the main structure.

The invention provides a whisker-modified paper-based friction material and a preparation method thereof. The friction material comprises, by mass, 45 to 55% of a fiber, 5 to 15% of a whisker, 15 to 25% of a modified phenolic resin, 10 to 15% of an inorganic filling material and 1% of a dispersant. The preparation method adopts traditional preparation technology for a paper-based friction material and comprises the following steps: uniformly mixing the fiber, the whisker and the filling material in water for pulping, carrying out papermaking and shaping so as to obtain a prefabricated friction material and drying the prefabricated friction material; and preparing a modified phenolic resin ethanol solution by dissolving the modified phenolic resin in an ethanol solvent, impregnating the prefabricated friction material with the modified phenolic resin ethanol solution and carrying out hot pressing and curing after evaporation of the solvent so as to obtain the whisker-modified paper-based friction material. The whisker-modified paper-based friction material can be used under a wet oil lubrication condition and has the advantages of a high dynamic friction coefficient, a low wear rate and small erosion of couple materials.

The invention belongs to the technical field of wear-resistant materials, and discloses a wear-resistant composite material with a high friction coefficient and a preparation method thereof. The wear-resistant composite material is mainly technically characterized by comprising the following raw materials in parts by weight: 10-30 parts of high-density polyethylene, 30-50 parts of ultra-high molecular weight polyethylene, 10-20 parts of cross-linked rubber powder, 0.1-0.5 part of an antioxidant 1010, 5-20 parts of inorganic powder, and 1-5 parts of carbon black. According to the wear-resistant composite material with the high friction coefficient, provided by the invention, all the components are mixed into pellets by using an internal mixer, then, the compression molding is carried out, and the machinability of the high-density polyethylene, the wear resistance of the ultra-high molecular weight polyethylene, and the high friction coefficient of the cross-linked rubber powder are fully utilized, so that the composite material with a high dynamic friction coefficient, good wear resistance and higher strength is obtained; the wear-resistant composite material with the high friction coefficient is prepared by adopting an internal mixing technology, and leftover materials can be recycled, so that environment friendliness is achieved.

The invention discloses a synchronous ring for a synchronizer and a method for manufacturing the synchronous ring. The synchronous ring comprises a synchronous ring base, and a friction plate is arranged in the synchronous ring base and consists of a flexible base layer and a friction layer which are compounded. A combined structure consisting of the flexible base layer and the friction layer replaces an existing machined friction layer structure, a hard friction material without elasticity and toughness is improved to form a bendable adhesive friction material without being machined, and a friction abrasion performance and reliability of the synchronous ring are improved. In addition, an oil drainage groove is directly pressed on the friction layer, process is simplified, and cost is lowered. Besides, the platy friction plate can be cut into various shapes according to actual needs, the process is simple, machining is omitted, materials are saved, and the synchronous ring is applicable to synchronizers.

The invention discloses a control method of the cooling bed entry table speed. The method is implemented specifically according to the following steps that the normal-state advancing coefficient of the speed of each roll table is set according to the linear speed of a rolling mill, and the steel bar splitting advancing coefficient of each roll table is set according to the specification of a steelmaterial; before a flying shear sends a shearing signal, a control system controls the rotating speed of each driving device, and the effect that the speed of each roll table is kept in the normal-state advancing coefficient all the time is guaranteed; after the flying shear sends a shearing signal, before the tail of the steel material is separated from a track, the control system controls the rotating speed of each driving device, and the effect that the speeds of corresponding roll tables is kept in the steel bar splitting advancing constant all the time is guaranteed; and after the tail of the steel material leaves the corresponding roll tables, the control system controls the rotating speed of each driving device, and thus the speeds of the roll tables are restored to the normal-state advancing coefficient. By means of the method, the problem which happens to control over the advancing amount of the cooling bed entry table speed is solved.

The invention discloses an anti-slip shrink film and a preparation method thereof. The anti-slip shrink film comprises the following components in mass percent: 50%-73% of low density polyethylene, 17%-30% of high density polyethylene, 7%-16% of ethylene-vinyl acetate copolymer, 1%-1.5% of anti-block agent, 1%-1.5% of lubricating agent, and 1%-1.5% antistatic agent, which are all placed into a mixing mill for mixing fully, then the mixed material is charged into an extruder for extrusion forming, and finally the material is cooled to obtain the anti-slip shrink film. Compared with the prior art, the anti-slip shrink film has higher dynamic friction coefficient, and is detected according to detection method in the national standard GB1006-88; the dynamic friction coefficient Mu is higher than 0.6; the commodity packaged by the anti-slip shrink film can be prevented from being damaged due to slipping during transportation.