579results about How to "Strong wear resistance" patented technology

The invention discloses a reduction method for an iron-based catalyst for Fischer-Tropsch synthesis in a fixed bed. The method comprises the following steps: adding the iron-based catalyst into a fixed bed reactor; and introducing gaseous hydrocarbon or mixed gas of hydrogen and gaseous hydrocarbon into the fixed bed reactor for reduction reaction to reduce the iron-based catalyst. The reduction method has the advantages that (1) the reduced catalyst has a little carbon deposit, so the catalyst has high activity and stability; (2) the product selectivity of the catalyst can be effectively modulated, and the selectivity for C5-30 in products is high; and (3) the reduced catalyst has a little carburization, so the catalyst has high wear resistance.

The invention discloses an alkyne selective hydrogenation catalyst carrier and a preparation method thereof; the hydrogenation catalyst carrier is obtained by well mixing and compounding alumina with one or two of SiC and talcum, and a catalyst containing an active ingredient of palladium is prepared. The catalyst can also contain co-catalytic ingredients of Ag, Mn, Bi, Mo, W, Cu, Zn, alkali metal, alkaline earth metal, and rare earth elements. The catalyst carrier has low raw material cost, and the obtained catalyst has high selective hydrogenation activity and good selectivity.

The invention relates to a rubber seal material formula which comprises 25 parts of hydrogenated nitrile-butadiene rubber, 70 parts of chloroprene rubber, 50 parts of acrylate rubber, 20 parts of silicon rubber, 30 parts of polyurethane rubber, 3 parts of plasticizer, 2 parts of softening agent dioctyl ester, 2 parts of activator zinc oxide, 1 part of oleyl alcohol, 9 parts of sulfur, 1 part of diacetyl peroxide, 2 parts of hydroxy silicon oil, 2 parts of alumina, 8 parts of flame retardant and 2 parts of anti-aging agent sulfydryl benzimidazole. Compared with the prior art, the rubber seal material provided by the invention can bear higher pressure, has the advantages of low friction factor and high abrasion resistance; and more scientific and reliable proportioning is performed in the vulcanization system and filler system to better display the synergistic action and prolong the normal working time of mechanical equipment.

The invention relates to a heat-pipe thermoelectric power generation energy storage and power transmission system for a rear smoke channel of a boiler, and the system comprises a thermoelectric power generation system, an energy supply system, and an energy storage system. A thermoelectric power generation unit in the thermoelectric power generation system comprises a cold-end heat pipe device, a hot-end heat pipe device and a thermoelectric power generation piece disposed between the cold-end heat pipe device and the hot-end heat pipe device, wherein the cold-end heat pipe device and the hot-end heat pipe device are vertically arranged in a structure. The thermoelectric power generation piece is disposed on the rear smoke channel, and the hot-end heat pipe device of the thermoelectric power generation unit makes contact with the high-temperature flue gas to absorb heat, and maintains the high temperature of the hot surface of the thermoelectric power generation piece. The cold-end heat pipe device makes contact with the ambient atmosphere, and maintains the low temperature of a cold surface of the thermoelectric power generation piece. A direct current generated by the thermoelectric power generation system is converted and then is outputted to an electric appliance. Meanwhile, the redundant electric energy is directly stored in the energy storage device. Two ends of the thermoelectric power generation piece form a big temperature difference through the high-efficiency thermal conduction characteristics of a hot pipe, thereby improving the power generation efficiency of the thermoelectric power generation piece. The hot pipe is changed to be elliptical, thereby effectively reducing the wear, caused by solid particles, of the hot pipe.

The invention provides a three-directional friction adjustable strong-impact-resisting vibration isolator comprising a base, an upper cover, a vibration isolation spring component, a damping buffering component and a shock insulation component, wherein the damping buffering component comprises a friction sheet and a friction ring and the inner surface of the friction ring contacts with the outer surface of the friction sheet. The shock insulation component comprises a rubber block, a metal ring and a gasket, wherein the friction ring is arranged on the metal ring in a sleeved mode. The rubber block is clamped between the metal ring and the gasket, wherein the gasket contacts with the base or the upper cover. The three-directional friction adjustable strong-impact-resisting vibration isolator is strong in shock insulation performance and particularly suitable for a vibration isolation system in military electronic equipment. Besides, the three-directional friction adjustable strong-impact-resisting vibration isolator further has the advantages of bringing convenience to the spacial three-directional friction damping regulation, being anti-abrasive, being corrosion resisting and the like.

The invention discloses an electrolyte and technology for preparing a ceramic coating formed by plasma micro-arc oxidation on a zirconium alloy surface. The technology comprises the following steps: (1) preparing the electrolyte; (2) treating the zirconium alloy surface; and (3) carrying out the micro-arc oxidation technology. The invention has the advantages that the electrolyte is water solution of various compounds, can provide a micro-arc discharge center, and has proper acidity and alkalinity, good ionic conductivity and chemical stability; the solutes of the electrolyte have wide source and low price; the treatment of the zirconium alloy surface has low requirement, and the micro-arc oxidation technology is simple and convenient in control; the ceramic coating formed by micro-arc oxidization has larger thickness, and by adjusting the formula of the electrolyte and the conditions of the micro-arc oxidation technology, the thickness of the ceramic coating can be controlled in a range of 30-80 micrometers; and the ceramic coating has good wear resistance and corrosion resistance.

The invention discloses a method for preparing polyurea lubricating grease with high PB value. By changing an addition process of an additive, the additive is used as a part of base oil to undergo a thickening reaction so as to double the wear-resistant extreme pressure effect of the additive, reduce the proportion of the anti-wear and wear-resistant additive and improve economic efficiency, and the preparation method is favorable for environmental protection. An ureido lubricating grease composite consists of the base oil, a thickening agent and the additive; and the base oil is a mixture ofvarious kinds of mineral base oil, synthetic oil, tackifier and anti-wear and wear-resistant additives. The polyurea lubricating grease prepared by the method has the excellent anti-wear and wear-resistant performance, has the maximum nonseizure load PB of over 135 kilograms, has the characteristics of high drop point, low noise and strong adhesivity, can be used for machinery lubrication under the severe operating conditions, such as high temperature, overloading, moist, harmful media and the like and can be used as bearing lubricating grease for bearings operating at a high speed and a superspeed.

The invention discloses an anti-corrosion conductive ceramic electrode material for sewage and sludge treatment and a preparation method of the anti-corrosion conductive ceramic electrode material. The anti-corrosion conductive ceramic electrode material is characterized in that carbon is used as aggregate; the anti-corrosion conductive ceramic electrode material is prepared from artificial graphite, graphitized mesocarbon microbeads, a reinforcement binder, graphitized carbon fiber and E-44 epoxy resin. The preparation method comprises the following steps of adding a Ti4O7 functional additive having strong electrode performance, simultaneously adding one or several of ceramic anti-wear-corrosion components of TiB2, TiO2, TiC, B2O3, SiO2 and SiC, carrying out solidification, compression molding and high-temperature sintering after adding a mixing solvent and completely mixing the mixture, and finally preparing the anti-corrosion conductive ceramic electrode material. According to the anti-corrosion conductive ceramic electrode material and the preparation method, disclosed by the invention, aiming at an actual working situation of a sewage and sludge treatment environment, unique anti-corrosion components are added while low specific resistance of the anti-corrosion conductive ceramic electrode material is ensured, not only are wearing resistance and corrosion resistance of traditional ceramics obtained, but also excellent conductivity and excellent electrochemical performance are obtained, and the service life is up to more than 3500 hours.

The invention relates to a revetment structure composed of plastic steel plate piles and concrete. The revetment structure comprises plastic steel plate piles and a concrete coping, wherein the plastic steel plate piles are connected through a connector having two mutually matched ends; the concrete coping is preformed and can be stably buckled with the upper ends of the plate piles. The revetment structure can be used for revetments of rivers or lakes, is safe and stable, high in construction speed, low in construction cost, environment-friendly and pollution-free, less in influence on the surrounding environment, and long in durability, can be further used for resisting the seepage of embankments and dike bodies of rivers and protecting dams.