49results about How to "Good bite resistance" patented technology

The invention provides a high-temperature metal hard seal ball valve for granular media. The high-temperature metal hard seal ball valve comprises a valve body, a ball body, a valve rod, a valve seat and a bottom cover, wherein the ball body is arranged in a cavity in the valve body, the valve rod connected with the ball body extends out of the valve body through a center through hole at the upper part of the valve body, the bottom cover is positioned at the bottom of the valve body and comprises a bottom cover baseplate and a bottom cover shaft, the bottom cover baseplate is movably connected with the valve body, the bottom cover shaft penetrates through a through hole at the lower part of the valve body and is connected with the ball body in the cavity of the valve body, the ball body and the valve seat are made of metal materials, the valve seat is mounted in the valve body and on the inner wall which is in contact with the ball body, a spring seat is arranged on the outer side of the valve seat, a disc spring is mounted in a groove between the spring seat and the valve seat, a pressure ring is arranged on the outer side of the spring seat, the pressure ring is fixedly mounted on the spring seat through a screw, a pendant collet for playing a sealing role is arranged in the contact position of the spring seat, the pressure ring and the valve body, an O ring is arranged in the groove between the valve seat and the valve body, and the O ring is made of fluorine rubber.

An embodiment of the invention discloses a method for preparing aluminum bronze powder by water atomization. The method includes the steps: smelting 90.5-93.5% of Cu and 6.5-9.5% of Al to form alloy liquid under normal pressure at the temperature of 1250 DEG C; performing chemical refining deoxidation and slag raking; measuring and controlling components, adding covering agents into the alloy liquid and keeping the temperature at 1220-1250 DEG C in a standing manner; pouring the alloy liquid into a leakage ladle, atomizing the alloy liquid under the water pressure of 3-5MPa and at the water temperature of 45-50 DEG C by a free-fall nozzle under protection of inert gas to form alloy powder; dewatering and drying the alloy powder; and screening the alloy powder to obtain the aluminum bronze alloy powder with -150-+350 meshes. The aluminum bronze powder prepared by the method can serve as an anti-friction coating material in an engine sliding bearing, and environmental pollution caused by leaded anti-friction coating material is avoided.

The invention relates to a low-friction bush-free connecting rod-piston pin structure, in particular to a structure formed by matching a connecting rod of which a bush is omitted with a piston pin of which the surface is coated with a diamond-like coating material, namely DLC, and belongs to the technical field of connecting rod pistons. The structure comprises a connecting rod, a piston pin and a piston. The surface of the piston pin is coated with the diamond-like coating. A connecting rod small head hole comprises a middle hole section and side hole sections symmetrically formed in the left and right sides of the middle hole section. The generatrix of the middle hole section is axially straight. Each side hole section is a horn-shaped hole with the diameter is gradually increased from the side close to the middle hole section to the other side. The cross section of the connecting rod small head hole is in an oval shape. The diamond-like coating on the surface of the piston pin has high hardness, good abrasion resistance and self-lubricating property, low friction coefficient and good adhesive resistance, and completely adapts to the oil-less lubricating state of the connecting rod small head hole.

The invention discloses a composite coated bearing shell which comprises a steel backing layer, a basal layer, a nickel grid layer and an antifriction layer which are sequentially arranged. The composite coated bearing shell is characterized in that the antifriction layer is made of tin-copper-indium-aluminum oxide alloy, wherein the tin-copper-indium-aluminum oxide alloy comprises the following elements by proportion: 0.7-5% of copper, 2-20% of indium, 0.5-1.5% of aluminum oxide and the balance of tin. The composite coated bearing shell has the advantages of high bearing, wear resistance, seizure resistance, good embedding performance and corrosion resistance, no lead, environment friendliness and the like.

The invention discloses an aluminum base alloy which comprises the following components in percent by weight: 38-40% of zinc, 0.5-5% of silicon, 3.0-5% of copper, 0.5-1% of manganese, 0.3-0.5% of chromium, 1.2-1.8% of rhenium, 1-1.5% of boron, 0.038-0.048% of magnesium, 0.015-0.02% of titanium and the balance of aluminum. The invention further discloses a preparation method thereof. The aluminum base alloy disclosed by the invention has the advantages of high wear resistance, no axle-hang, low expansion rate, self-lubrication, anti-occluding function and high work temperature, and the low expansion rate of the alloy is realized, so that the aluminum base alloy is suitable for manufacturing various precise friction pair parts of mechanical equipment.

The invention discloses a molding method of chew type pet food. The molding method comprises the following steps: raw material mixing: mixing 16% of edible gum, 20% of broken pigskin, 40% of broken cowhide, 4% of vegetable protein, 10% of a wetting agent, 5% of plant fiber and 5% of additives by a chopper mixer, and performing mixing by an internal mixer to form raw material paste A; extrusion molding: putting the raw material paste in a food extruder to be extruded into gum strips; air drying and setting: placing a blowing device at a discharge port of the food extruder, performing air dryingon the extruded gum strips; and vacuum drying: placing the gum strips in a vacuum oven for drying at the drying temperature of 53-75 DEG C until the moisture weight content reaches 31%-33%. The chewing resistance of the product can be improved, so that pet food is more durable, the product quality can be improved, by vacuum drying of the extruded rubber strips, the condition that the product sticks to a die during die pressing can be avoided, production is facilitated, and the production efficiency of the product can be improved.

The invention discloses a high-strength wearproof iron-based powder metallurgy bearing material and a preparation method thereof. The high-strength wearproof iron-based powder metallurgy bearing material is characterized by being composed of the following components by weight percent: 16.0%-18.0% of copper, 0.80%-0.90% of carbon, 0.01%-1.0% of cerium fluoride and the balance of iron, wherein the total amount of impurities is not higher than 2%. The process for preparing the iron-based powder metallurgy bearing material comprises the steps of mixing powder, pressing, sintering, heat treatment and vacuum oil immersion. The iron-based powder metallurgy bearing material provided by the invention has high-strength wear-resisting properties, specifically, the crushing strength of the bearing material ranges from 720 MPa to 780 MPa, the Rockwell hardness of the bearing material ranges from 90 HRB to 110 HRB, the oil length of the bearing material ranges from 13% to 16% and the oiling friction coefficient of the bearing material ranges from 0.08 to 0.09. The material provided by the invention is used as oil cylinder bearings of engineering machinery, such as an excavator and a bulldozer.

The invention provides an HYB-copper-based inlaid solid lubricating bearing, and relates to the field of bearings. The HYB-650 copper-based inlaid solid lubricating bearing and a manufacturing processthereof comprise a bearing substrate, lace embedded holes and a corrugated solid lubricating column. The bearing substrate comprises a copper-base layer and a sintered layer. The lace embedded holespenetrate through the inner and outer diameters of the bearing substrate. A plurality of lace embedded holes are distributed criss-crossed on the bearing substrate. The HYB-650 copper-based inlaid solid lubricating bearing and the manufacturing process thereof, through special and unique creation of basic mechanism of the solid lubricating bearing, under the premise of not affecting the integrityof the bearing, greatly improves the problem of poor durability of a lubricating oil film of the solid lubrication bearing, and reserves a lubricating strip film which can be used directly for the oilfilm, thereby effectively solves the problem of poor continuous replenishment of a solid lubricant of a general copper-based inlaid solid lubricating bearing, and the problem of the lubrication effect being in a diminishing state when the solid lubricant is not completely consumed.

The invention relates to a double-layer metal composite material applied to sliding bearings and a preparation method of the double-layer metal composite material. A bearing layer of the double-layermetal composite material is made from a copper alloy, an anti-friction alloy layer is made from a medium-high-tin aluminum-based alloy, wherein the content of a tin element in the medium-high-tin aluminum-based alloy is 10 wt% -50 wt%, the sum of an aluminum element and the tin element, by mass is larger than or equal to 90%, the aluminum element and the tin element are the main alloy elements, and the medium-high-tin aluminum-based alloy is the multi-element alloy. The preparation method of the double-layer metal composite material comprises the following steps that the copper alloy for the bearing layer is prepared according to requirements for processing; the medium-high-tin aluminum-based alloy is made into welding wires; and the welding wires are welded to the surface of the copper alloy in an overlaying mode to serve as the anti-friction alloy layer, and the double-layer metal composite material applied to the sliding bearings is obtained. According to the double-layer metal composite material applied to the sliding bearings, the very high bonding strength is achieved, the copper alloy has good fatigue strength, thermal conductivity and corrosion resistance, and the medium-high-tin aluminum-based alloy has good fatigue strength, bite resistance and embedding property.

The invention discloses pet dental care chews with high palatability and a processing method thereof. The pet dental care chews are made with a base material and a palatable material; the base material is made with, by mass, 15-30% of starch, 15-30% of wheat gluten, 2-10% of edible natural plant fibers, 6-10% of phosphate-modified starch, 0.2-1% of sodium tripolyphosphate, 0.4-1% of an acidity regulator, 15-25% of glycerol, and 15-25% of water. The palatable material is made with, by mass, 80-90% of fresh meat, 2-10% of starch, 2-8% of glycerol, 0.2-1% of sodium tripolyphosphate, and 1-5% of water. The pet dental care chews herein have good dental cleaning effect and good palatability; the processing method of the pet dental care chews is more efficient than the prior art.

The invention discloses a technology of utilizing a liquid-solid rolling cladding method to prepare a bimetallic bearing. According to the technical scheme, the technology comprises the following steps: adopting the liquid-solid rolling cladding method combining a casting method with a composite method; directly pouring zinc-based aluminum alloy molten metal to a base metal; cooling, solidifying and rolling by water cooled rolls to produce a composite board without larger plastic deformation. The technology disclosed by the invention has the characteristics as follows: the bimetallic bearing alloy prepared by the technology is excellent in compression resistance, tension resistance, mechanical property, friction performance, high-temperature stability performance and casting property; meanwhile, the liquid-solid rolling cladding method is a near net-shape processing method organically combining the hot dip aluminum plating with aluminum alloy cast rolling, so that the method is high in combined strength, low in production cost, less in equipment investment, high in production efficiency, low in energy consumption and high in composite board binding strength, and further has a good market prospect.

The invention discloses a tribological design and preparation method of an FeNiAlNb-based pin shaft multilayer composite structure material. A FeNiAlNb matrix, an antifriction agent, an anti-wear agent and a reinforcing agent are adopted as the components, a multi-element tabular crystal is prepared, by means of each layer material component design and computation, vibration mixing, hot press molding, multi-layer structure compounding and subsequent machining procedures, the FeNiAlNb-based pin shaft multilayer composite structure material can be prepared. Through reasonable design and optimalproportioning of the matrix alloy, the antifriction agent, the anti-wear agent and the reinforcing agent on a friction film, a bearing transition layer and a matrix bearing layer, the material utilization rate is improved, the production cost is reduced, and the FeNiAlNb-based pin shaft multilayer composite structure material can meet the friction and wear properties under high-low temperature andhigh-load working conditions while having excellent thermal stability and mechanical properties, and also significantly enhances the use precision and service life of the pin shaft on the premise ofobviously improving the connection strength and bearing capacity of the pin shaft.

The invention relates to a preparation method for heavy-load high-power vehicle engine high-purity aluminum-tin bearing materials. The preparation method includes the detailed steps of weighing industrial pure metallic tin, first-level electrolytic copper and special second-level aluminum ingots for re-melting in proportion; weighing first-level potassium fluotitanate; putting the first-level potassium fluotitanate into a constant temperature preheating drying furnace for drying; putting the special second-level aluminum ingots for re-melting into an industrial furnace; adding the industrial pure metallic tin and first-level electrolytic copper after all the special second-level aluminum ingots in the furnace are smelted; sampling and detecting alloy contents; putting the first-level potassium fluotitanate into aluminium alloy melt; and casting. According to the aluminum-tin bearing materials prepared in the method, strength reaches 140-165 megapascals, elongation reaches 15-19 %, brinell hardness reaches 45-51, fatigue strength reaches 90-106 megapascals, abrasion loss reaches 6.7-7 * 10-4 grams, anti-seizure adhesiveness reached the second level, and friction coefficient is 0.038-0.042. Therefore, the prepared bearing materials are high in bearing capacity, are good in abrasion-resistance, antifriction performance and anti-seizure adhesiveness, meet the requirements of a heavy-load high-power vehicle engine, and have broad application prospects.

The invention provides a cable, and belongs to the technical field of cables. The cable solves the problem of low tensile strength of the existing cable. The cable comprises an inner sheath; a plurality of wire cables are annularly arranged in the inner sheath; an outer sheath is arranged on the inner sheath; a reinforcing layer is arranged between the outer sheath and the inner sheath; the reinforcing layer comprises at least one reinforcing rib; the inner sheath is wrapped with the reinforcing rib, and the reinforcing rib is in contact with the inner sheath and the outer sheath, wherein the reinforcing rib is made from a manganese iron alloy; and the manganese iron alloy comprises the following components in parts by weight: 100-300 parts of iron, 200-500 parts of manganese, 50-80 parts of silicon, 20-30 parts of carbon, 20-30 parts of titanium carbide, 10-20 parts of molybdenum, 5-10 parts of scandium and 5-10 parts of lanthanum. The cable has the advantages of high tensile strength and long service life.