31results about How to "Strength meets" patented technology

The invention discloses a rotor blade structure capable of inhibiting the rotation chattering of a tilt rotor, belonging to the technical field of tilt rotors. The rotor blade structure comprises a blade girder, a skin and a filler core; on the basis that the position of the girder, the wing shape of the blade and the torsion angle are maintained not to be changed, middle chord lines on all cross sections are bended upwards by a certain angle at the part which is a certain distance away from a front edge point from some radial position of a blade to the tip; meanwhile, the skin and the filler are bended upwards by the same angle; the lengths of the bended parts are linearly increased along with the increment of the radial position. After the rotor blade structure is used, the shearing gas power in a rotor wing shimmy surface can be effectively reduced, and the system damping is improved, so that the rotor blade structure has a good effect of inhibiting the rotation chattering and is capable of effectively accelerating the speed of the rotation chattering. The structure meets the basic performance requirement of the rotor blade structure of the tilt rotor and is simple in structure, and the weight of the blade is not increased.

The present invention discloses a shaddock peel based biodegradable plastic, which is characterized by being prepared from the following materials by weight: 25-35 parts of shaddock peel, 2-4 parts of lotus root starch, 5-10 parts of potato starch, 3-5 parts of sawdust, 3-5 parts of montmorillonite soil, 1-2 parts of carrageenan, 10-15 parts of polyethylene, 1-2 parts of a silane coupling agent KH-550, 1-2 parts of glucose, 1-2 parts of urea, 2-4 parts of sesame oil, 1-2 parts of sea buckthorn oil, 1-2 parts of micro microcrystalline cellulose and 10-15 parts of a compound additive. The biodegradable plastic has the advantages of high degradation rate, high degradation speed, good flexibility and strength meeting the usage requirement, simple production technology, effectively reduction of white pollution, and high environmental and economic benefits.

The invention discloses a production process for a polyurethane integrated plate by a mold embedded with a reclaimed material. The production process comprises the following steps of: separating the mold into a low-density decorative layer mold cavity and a high-density heat insulation layer mold cavity through a movable baffle, adding a decorative layer polyurethane material by using a foaming machine, and foaming and molding to form a polyurethane decorative layer; and curing, turning the mold, extracting the baffle, adding the polyurethane reclaimed material, adding a heat insulation layerpolyurethane material into the mold by using the foaming machine, making the material infiltrate the reclaimed material and fully fused with the reclaimed material to coat the reclaimed material, andfoaming on the surface of the molded decorative layer to form the polyurethane heat insulation layer. The production process solves the problem that the polyurethane reclaimed material cannot be utilized on a large scale, the production cost of a polyurethane decorative insulation board is greatly reduced, production procedures are reduced, the loss of production machines is reduced, and large-scale industrial production is realized.

The present invention discloses a kelp powder biodegradable plastic, which is characterized by being prepared from the following raw materials by weight: 20-30 parts of kelp powder, 10-15 parts of corn starch, 3-5 parts of corn gluten meal, 3-5 parts of bentonite, 3-5 parts of light calcium carbonate, 10-15 parts of polyethylene, 4-8 parts of linseed oil, 1-2 parts of sucrose, 1-2 parts of humic acid, 0.1-0.2 part of potassium chloride, 1-2 parts of a silane coupling agent KH-550 and 10-15 parts of a compound additive. The biodegradable plastic has the advantages of high degradation rate, high degradation speed, good flexibility and strength meeting the usage requirement, simple production technology, effective reduction of white pollution, and high environmental and economic benefits.

The invention discloses a rotor blade structure capable of inhibiting the rotation chattering of a tilt rotor, belonging to the technical field of tilt rotors. The rotor blade structure comprises a blade girder, a skin and a filler core; on the basis that the position of the girder, the wing shape of the blade and the torsion angle are maintained not to be changed, middle chord lines on all cross sections are bended upwards by a certain angle at the part which is a certain distance away from a front edge point from some radial position of a blade to the tip; meanwhile, the skin and the filler are bended upwards by the same angle; the lengths of the bended parts are linearly increased along with the increment of the radial position. After the rotor blade structure is used, the shearing gas power in a rotor wing shimmy surface can be effectively reduced, and the system damping is improved, so that the rotor blade structure has a good effect of inhibiting the rotation chattering and is capable of effectively accelerating the speed of the rotation chattering. The structure meets the basic performance requirement of the rotor blade structure of the tilt rotor and is simple in structure, and the weight of the blade is not increased.

The invention relates to a colour-changeable electric wire insulation sleeve, and is characterized in that the colour-changeable electric wire insulation sleeve is a colour-changeable electric wire insulation sleeve, the colour of which is changed overall, or a colour-changeable electric wire insulation sleeve comprising one or more colour-changeable strips. The invention further relates to a colour-changeable electric wire adopting the colour-changeable electric wire insulation sleeve, and a manufacturing method of the colour-changeable electric wire. Photochromism of a sleeve outside an electric wire can be realized; therefore, the sleeve has enjoyment and experience in the use process; furthermore, product performances thereof accord with the properties of the electric wire, such as the insulation property and the strength; and thus, the sleeve has good market prospect.

The invention provides a foam concrete sandwich color wall steel plate and a production technique thereof. The foam concrete sandwich color wall steel plate comprises a first steel plate layer, a second steel plate layer, a cement paste layer, a first foam concrete layer and a second foam concrete layer, wherein the first steel plate layer and the second steel plate layer are parallel; the cement paste layer is located between the first steel plate layer and the second steel plate layer; the space between the first steel plate layer and the cement paste layer is filled with the first foam concrete layer; and the space between the second steel plate layer and the cement paste layer is filled with the second foam concrete layer. The production technique comprises the steps of die-filling, pouring, die disassembling, combining, forming and the like. The foam concrete layers are adopted as a sandwich material and are not prone to combustion, and compared with traditional sandwich materials, the foam concrete layers are relatively hard and not prone to aging, the fracture resistance is relatively good, and the service life is relatively long. In addition, the foam concrete layers and the cement paste layer are used as the sandwich material, the effect that the sandwich color wall steel plate has the strength as traditional EPS composite wallboards is ensured, and no toxic gas is emitted at high temperatures.

The invention relates to a light emitting module and a light emitting keyboard. The light emitting module comprises a circuit board, a light emitting unit, a transparent glue layer, a light guide plate, and a reflective layer. The light emitting unit is arranged on the circuit board, and has a light-out surface used to emit light. The transparent glue layer has a first gluing part and a second gluing part, the first gluing part has a first side and a second side which face each other, the second gluing part has a third side and a fourth side which face each other, the first side of the first gluing part is arranged on the circuit board, and the third side of the second gluing part is adhered to the light-out surface of the light emitting unit. The light guide plate has a light-in surface used to receive light transmitted via the second gluing part. The light-in surface faces the light-out surface of the light emitting unit, and the light-in surface of the light guide plate is adhered to the fourth side of the second gluing part. The reflective layer is arranged under the light guide plate, and the bottom side of the reflective layer is adhered to the second side of the first gluing part. The light-in surface of the light guide plate and the light-out surface of the light emitting unit are connected by the second gluing part, and therefore, the phenomenon of halo can be avoided.

The invention belongs to the technical field of low-temperature natural gas liquefaction, and relates to LNG (liquefied natural gas) secondary low-temperature liquefaction equipment and the technique of refrigeration by mixed refrigerant. C2H4 refrigerant and N2-CH4 mixed refrigerant steam of 0.3MPa and -130 DEG C from an LNG three-level outlet are used for cooling and liquefying natural gas of 5.8MPa and -53 DEG C in a three-stream spiral wound type heat exchanger, so that LNG can conveniently enter a three-level undercooling stage. The three-stream spiral wound type heat exchanger for secondary liquefaction is used for undercooling the C2H4 refrigerant first, the undercooled C2H4 refrigerant is throttled to a shell side to be mixed with the N2-CH4 to cool a -53-DEG C LNG pipeline, a N2-CH4 precooling tube bundle and a C2H4 undercooling tube bundle, so that undercooling of the C2H4 and precooling of the N2-CH4 and liquefaction of natural gas are realized. The equipment is compact in structure and high in heat exchange efficiency, and can be used for the field of phase-variable low-temperature heat exchange of gas at temperature ranging from -53 DEG C to -120 DEG C, the problem of LNG secondary low-temperature liquefaction is solved, and low-temperature heat exchanging efficiency of an LNG system can be improved.

The invention discloses a composite aluminum rim and a manufacturing method thereof. The composite aluminum rim comprises a left ring body molded by punching, a right ring body molded by die casting and a web plate; a connecting part molded by rolling is arranged in the right ring body; each of the two abutting ends of the connecting part is provided with a plurality of rectangular notches, and rectangular convex blocks adapted to the corresponding rectangular notches; a rectangular sawtooth is formed between every two adjacent rectangular notches; a rectangular groove is formed between every two adjacent rectangular convex blocks; the connecting part comprises an embedded section connected with the right ring body, and a welding section welded with the left ring body; when the right ring body and the web plate are subjected to die-casting molding, the connecting part is connected with a mould core of a die-casting molding mould in a sleeving manner, so that an adjustment gap is formed between the end of each rectangular convex block and the bottom of one corresponding rectangular notch, and an adjustment gap is formed between the end of each rectangular sawtooth and the bottom of one corresponding rectangular groove; and reinforced connecting blocks are formed in the adjustment gaps. With the adoption of the scheme, the intensity of the composite aluminum rim can be guaranteed, the production efficiency can be improved and thus the manufacturing cost is reduced, the quality grade of the composite aluminum rim can be raised effectively, and the composite aluminum rim meets the requirements of a high-quality vehicle.

The invention discloses a composite aluminum rim and a manufacturing method thereof. The composite aluminum rim comprises a left ring body molded by punching, a right ring body molded by die casting and a web plate; a connecting part molded by rolling is arranged in the right ring body; each of the two abutting ends of the connecting part is provided with a plurality of rectangular notches, and rectangular convex blocks adapted to the corresponding rectangular notches; a rectangular sawtooth is formed between every two adjacent rectangular notches; a rectangular groove is formed between every two adjacent rectangular convex blocks; the connecting part comprises an embedded section connected with the right ring body, and a welding section welded with the left ring body; when the right ring body and the web plate are subjected to die-casting molding, the connecting part is connected with a mould core of a die-casting molding mould in a sleeving manner, so that an adjustment gap is formed between the end of each rectangular convex block and the bottom of one corresponding rectangular notch, and an adjustment gap is formed between the end of each rectangular sawtooth and the bottom of one corresponding rectangular groove; and reinforced connecting blocks are formed in the adjustment gaps. With the adoption of the scheme, the intensity of the composite aluminum rim can be guaranteed, the production efficiency can be improved and thus the manufacturing cost is reduced, the quality grade of the composite aluminum rim can be raised effectively, and the composite aluminum rim meets the requirements of a high-quality vehicle.

The invention discloses a civil aircraft fuselage bottom structure considering impact strength, comprising bulkheads, outer panel skin, long purlins and foam; on the foundation of arc-shaped fuselage bulkheads, the contour of the fuselage remains unchanged, upper architraves and lower architraves of the bulkheads are hoisted upwards, the arc shape of the bulkhead bottom is changed to the flatbottom shape, the lower part of each bulkhead is symmetrically provided with a piece of foam, the ends at the two sides of the foam are provided with non-closed-angle-shaped structures in certain height, the lower part of the foam is supported by ventral outer panel skin, the top and sides of the foam adopt the outer panel skin for supporting, the two sides and the top of the foam are provided with long purlin structures which have the function of longitudinal reinforcement. The fuselage bottom foam structure of the invention can greatly improve the crash resistance of the fuselage structure, the new structure consisting of the outer panel skin and the foam contributes to bearing distributed load, as a result, the fuselage bottom structure of the invention not only has good crash resistance against ground crash but also has good crash resistance against water surface impact accidents.

The invention relates to a foreign matter withdrawing claw under a digestive endoscopy. The foreign matter withdrawing claw under a digestive endoscopy comprises a handle and a sheath, wherein the tail end of the handle is fixed to the near end of the sheath; guide wires are arranged in the sheath in a penetrating manner; a sliding rail is arranged on the handle; a ring for drawing back or pushingthe guide wires to move in the sheath is arranged on the sliding rail in a sliding manner, and is fixed to the near ends of the guide wires; the far end positions of the guide wires are connected with a capturing umbrella; the capturing umbrella is elastic hook claws on which the guide wires are uniformly arranged in the circumferential direction; the initial state of the hook claws in the sheathis that the hook backs face the guide wires; and under a relaxed state, the claw tips of the hook claws outside the sheath extend towards the guide wires, and the hook claws are propped at the claw tips. The foreign matter withdrawing claw under a digestive endoscopy disclosed by the invention has the beneficial effects that to foreign matters including polyps and the like which are far from an outlet of a natural cavity channel, under the situation that the foreign matters cannot be withdrawn or drawn out with a conventional apparatus through a plier channel, the foreign matter withdrawing claw under a digestive endoscopy can be used for attempting quick and safe withdrawing under the situation that endoscopy withdrawing is not or slightly performed.

The invention discloses steaming-free foam concrete, a production method of steaming-free foam concrete building blocks and dedicated cutting equipment. The steaming-free foam concrete comprises, by weight, 150 parts to 400 parts of cement, 20 parts to 200 parts of mixed materials, 50 parts to 300 parts of water, 15 parts to 50 parts of regulators and five parts to 15 parts of foaming agents. The strength of the building blocks can be improved fast and is large, and above all, the heat preservation, heat insulation and water prevention performance is good, investment cost is low, production efficiency is high, and cutting efficiency is high.

The invention discloses a degradable master batch, which consists of the following components: 5%-75% of starch, 5%-50% of carbon dioxide polymer, 5%-30% of polyvinyl alcohol, 1%-10% of compatilizer and 1%-15% of plasticizer (all are based on weight percent). The device disclosed by the invention is nontoxic, harmless, clean and pollution-free, and has the advantages of low cost, simplicity in technique, complete degradation and excellent performance.

The invention discloses dry-mixed mortar prepared from hot furnace slag and a preparation method of the dry-mixed mortar. The dry-mixed mortar comprises the following components in parts by mass: 200-750 parts of an inorganic cementitious material, 280-900 parts of medium sand, 500-1220 parts of hot furnace slag sand and 2-7.5 parts of an additive, wherein the inorganic cementitious material comprises the following components in percentage by mass: 50-65% of cement, 25-30% of hot furnace slag power, 5-10% of blast furnace slag fine powder and 5-10% of limestone fine powder; the additive is cellulose; the hot furnace slag is nickel ore smelting slag; after the hot furnace slag is sieved, the hot furnace slag with the particle sizes of 0.6-2.36 mm is the hot furnace slag sand. All the components are measured according to the formula, and then mixed and stirred to obtain the dry-mixed mortar. According to the preparation method, the process is simple; dry-mixed mortar with the grade of M5-M30 can be prepared; the rate of multipurpose utilization of the hot furnace slag can be remarkably increased; environmental pollution is reduced; social and economic benefits are obvious.

The invention discloses a production process for a polyurethane integrated plate by a mold embedded with a reclaimed material. The production process comprises the following steps of: separating the mold into a low-density decorative layer mold cavity and a high-density heat insulation layer mold cavity through a movable baffle, adding a decorative layer polyurethane material by using a foaming machine, and foaming and molding to form a polyurethane decorative layer; and curing, turning the mold, extracting the baffle, adding the polyurethane reclaimed material, adding a heat insulation layer polyurethane material into the mold by using the foaming machine, making the material infiltrate the reclaimed material and fully fused with the reclaimed material to coat the reclaimed material, and foaming on the surface of the molded decorative layer to form the polyurethane heat insulation layer. The production process solves the problem that the polyurethane reclaimed material cannot be utilized on a large scale, the production cost of a polyurethane decorative insulation board is greatly reduced, production procedures are reduced, the loss of production machines is reduced, and large-scale industrial production is realized.

The invention relates to degradable starch-based plastic masterbatch and a preparation method thereof. The degradable starch-based plastic masterbatch is prepared from the following raw materials in part by weight: 40 to 70 parts of starch, 10 to 20 parts of light calcium carbonate, 2 to 10 parts of fine aggregate, 13 to 25 parts of plastic materials, 1 to 5 parts of compatilizer, 1 to 5 parts oflubricant, 1 to 5 parts of modifier and 1 to 5 parts of degradation promoter. The light calcium carbonate and the fine aggregate are added into the degradable starch-based plastic masterbatch, so that the use level of synthetic polymers is reduced greatly; and through the preparation under the reasonable process condition, the quality of products is improved, and the cost is reduced by 45 percenton the premise of ensuring the degradation effect.

The invention provides a hollow metal microneedle and a batch preparation method thereof. The steps are: (1) sputtering a metal seed layer on a substrate as a conductive layer; (2) electroplating a metal layer on the conductive layer as a release layer; (3) (4) electroplating metal to fill the pattern, making the first layer of microneedles, and then sputtering the metal seed layer; (5) throwing the photoresist on the metal seed layer and patterning; (6) ) The patterned photoresist is properly baked; (7) The metal seed layer is sputtered; (8) The photoresist is thrown off and patterned, and the metal is electroplated to make the second layer of microneedles; (9) The glue is removed to release the microneedles. The present invention adopts the micro-machining technology, and overcomes the difficulty that the traditional injection needle production technology is difficult to manufacture extremely fine needles in batches.