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57results about How to "Do not change shape" patented technology

Passive heat-reduction and drag-reduction device and method for high-velocity flow-around boundary layer

A passive heat-reduction and drag-reduction device and method for a high-velocity flow-around boundary layer. A plurality of rough belts are arranged on the surface of an aircraft to achieve passive heat reduction and drag reduction of the high-velocity flow-around boundary layer of the aircraft. Under the condition of high-velocity flows, the flow-around characteristic, near the wall surface (namely, in the area that the Mach number >= 3.5 and the distance to the wall surface <= 0.3 times the nominal thickness of a local boundary layer), of the high-velocity boundary layer is utilized to propose new principles of delayed heat transition in a laminar flow area and heat reduction and drag reduction in a turbulent flow area. The use of elliptic cylinders, quasi-prisms or rectangular columnscan produce a stable trailing vortex structure and isolated roughness elements of which the height <= 0.3 times the nominal thickness of the local boundary layer so as to achieve the functions of thedelayed transition in the laminar flow area and the heat reduction and drag reduction in the turbulent flow area. The passive heat-reduction and drag-reduction device and method for the high-velocityflow-around boundary layer can effectively reduce the energy consumption and the heat protection pressure of the aircraft and improve the endurance ability and payload of the aircraft under the condition that the flight Mach number >= 3.5 and without changing the appearance of the aircraft, applying additional energy or increasing additional equipment.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS

Touch tool full-automatic braze welding equipment

The invention discloses touch tool full-automatic braze welding equipment. The touch tool full-automatic braze welding equipment is characterized in that a welding mechanism is arranged on a table, corresponding executing mechanisms are arranged around the welding mechanism, that is, the touch tool feeding mechanism is arranged on a first station, the soldering lug feeding mechanism is arranged ona second station, the touch spot feeding mechanism is arranged on a third station, and the discharging mechanical hand and a material box are arranged on a fourth station; the welding mechanism comprises a portal type U-shaped frame, the upper portion of the U-shaped frame is provided with a pressing unit, and an upper electrode assembly is arranged on the lower portion of the pressing unit; andthe lower portion of the U-shaped frame is provided with a suspension supporting unit. According to the touch tool full-automatic braze welding equipment, through a four-stage heating mechanism, a four-stage flexible pressurizing mechanism, a seamless pressurizing fitting mechanism and an automatic feeding mechanism, full-automatic braze welding of a touch tool and a touch spot is achieved, the welding quality is stable, the working efficiency is high, and the equipment cost is low.
Owner:YUEQING YEDAO ELECTROMECHANICAL CO LTD

Device and method for anti-stuck and off-stuck of automobile tires

The invention relates to a device and method for anti-stuck and off-stuck of automobile tires. The device for anti-stuck and off-stuck of the automobile tires comprises a hub fixing device, a telescopic device and a pressing plate. The hub fixing device comprises a fixing frame, a stopping block and a rubber cushion; a longitudinal adjusting hole is formed in the middle of the fixing frame and fixed to a bolt hole of an outer rod through a bolt group in a matched mode; transverse adjusting holes are formed in the two ends of the fixing frame, the stopping block is fixed in the adjusting holes through the bolt group, and a stopping column is arranged on the stopping block; the telescopic device comprises the outer rod and an inner rod; the up, down, left and right directions of the outer rod are restrained through the hub fixing device, and the outer rod is fixed to a hub in a clamped mode; the hub and the outer rod are twined and fastened together through a pasting cloth tape; round holes in the inner rod and the outer rod are assembled and fixed by the inner rod through the bolt group, so that the inner rod is placed in a track arranged on the outer rod; and the pressing plate is installed at the outer end of the inner rod through bolts. The device for anti-stuck and off-stuck of the automobile tires is suitable for most automobiles with the hub, simple in structure, and convenient to install and carry, and the device for anti-stuck and off-stuck of the automobile tires has the scalability.
Owner:ANHUI UNIV OF SCI & TECH

Novel multilayer film capable of improving extreme ultraviolet spectrum purity and thermal stability

InactiveCN103091744AChange shapeDoes not change the direction of radiationMirrorsPhotomechanical exposure apparatusUv spectrumThermal stability
The invention discloses a novel multilayer film capable of improving extreme ultraviolet spectrum purity and thermal stability and belongs to the filed of extreme ultraviolet lithography. The novel multilayer film is a periodic multilayer film, and substrate of the periodic multilayer film is plated with a silicon (Si) layer and a molybdenum (Mo) layer in sequence, wherein the Si layer and the Mo layer are alternant. The novel multilayer film further comprises a thermal stability layer which is manufactured on the periodic multilayer film, wherein the Si layer and the Mo layer are alternant on the periodic multilayer film. The novel multilayer film capable of improving the extreme ultraviolet spectrum purity and the thermal stability can guarantee that reflectivity losses of extreme ultraviolet wavebands can be ignored and restrains reflectivity of wavebands out of band effectively on the condition that appearances of films are not changed, optical elements are not increased, radial directions of light are not changed and processing steps are not added in addition through the periodic multilayer film with an alternant Si layer and a Mo layer being plated with a silicon nitride (Si3N4) thermal stability layer.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Hollow slab beam reinforcing method and hollow slab beam

The invention relates to the technical field of bridge reinforcement, in particular to a hollow slab beam reinforcement method. The method comprises the following steps of S1, determining a shear bearing capacity insufficient area and a shear bearing capacity satisfaction area of the hollow slab beam; S2, drilling at least one construction hole in the shear bearing capacity insufficient area so that the cavity of the hollow slab girder is communicated with the construction holes; S3, pouring lateral framework materials into the cavity of the hollow slab beam through the construction holes to form a lateral formwork, wherein the lateral formwork separates the shear bearing capacity insufficient region from the shear bearing capacity satisfaction region; and S4, filling the cavity of the shear bearing capacity insufficient region with reinforcing materials to form a solid reinforcing body. Through the construction holes, it can be ensured that reinforcing materials enter the cavity, andthe lateral formworks can prevent the reinforcing materials from flowing from the shear bearing capacity insufficient area to the shear bearing capacity satisfaction area, so the using amount of the reinforcing materials is reduced, the maintenance and reinforcement cost is reduced, and the situation that the bearing capacity of the lower structure of the bridge is affected due to excessive increase of the dead weight of the hollow slab beam is avoided.
Owner:南京博瑞吉工程技术有限公司

Compact liquid-tube vacuum tube water heater compatible with phase change heat storage function

A compact liquid-tube vacuum tube water heater compatible with a phase change heat storage function is available in four types, namely phase change heat storage, non-phase-change heat storage, single natural cycle heat storage, and double natural cycle heat storage. The compact liquid-tube vacuum tube water heater comprises liquid-tube vacuum tubes (1), an insulation water tank (2), a multifunctional header (3), a support (4) and the like. The upper end of a heat transfer liquid tube (16) in each liquid-tube vacuum tube (1) is communicated with a heat transfer liquid tube connector (7) of the insulation water tank (2) through a seal ring; the lower end of every heat transfer liquid tube (16) is communicated with a flow passage of a header tube (8) in the multifunctional header (3) through a seal ring. An electric heating tube (9) is mounted in the flow passage of the header tube (8) of the multifunctional header (3). A temperature control fan (18) is mounted on the insulation water tank (2). The liquid-tube vacuum tubes (1) include liquid-tube vacuum collector tubes and liquid-tube phase change heat storage vacuum collector tubes; the two types of tubes are universal, compatible and exchangeable and can be mixed for use. The compact liquid-tube vacuum tube water heater has the functions of freezing prevention, adjustable water temperature of the lower end of the water tank, controllable temperature of the upper end of the water tank and the like.
Owner:秦三根

Full-fresh-air overhead air conditioner

The invention relates to the field of an air conditioning device of a passenger car, in particular to a full-fresh-air overhead air conditioner which comprises a fresh air inlet, a fresh air door, a return air inlet, a return air grille, an air supply outlet, a core body dust filter screen, a fresh air filter screen, a condensate fan, a core body of an evaporator, an evaporation fan and a motor of the fresh air door, and has the characteristic structure that the full-fresh-air overhead air conditioner further comprises a return air door mechanism, an overflow air door mechanism, a return air door motor and an overflow air door motor; the design of the oversized fresh air inlet is adopted, and the return air door mechanism and the overflow air door mechanism are added, so that three running modes including full fresh air, part fresh air and full return air can be realized; due to the design of water leakage prevention, a rotary shutter structure is respectively adopted by the fresh airdoor, a return air door and an overflow air door which are respectively controlled by three independent motors; and a fresh air filtering device and a return air filtering device are arranged. The full-fresh-air overhead air conditioner has the characteristics of energy conservation, environmental protection, high comfortableness and good technological efficiency.
Owner:SONGZ AUTOMOBILE AIR CONDITIONING

Wind-assisted braking system for automobile

The invention provides a wind-assisted braking system for an automobile. The system comprises an auxiliary braking wing plate hidden on a trunk of the automobile, wherein one end of the auxiliary braking wing plate is hinged on a lower frame of a back windshield of the automobile; both sides of the auxiliary braking wing plate are fixed to two triangular brackets; one side of each triangular bracket is fixedly connected with the auxiliary braking wing plate; the auxiliary braking wing plate and the triangular brackets share a hinge point I with a cover plate of the truck of the automobile; a hemispherical cavity on a corner of the triangular bracket opposite to the auxiliary braking wing plate is connected with a ball head at one end of a hydraulic cylinder piston; the lower part of a hydraulic cylinder is hinged at the bottom of the trunk through a hinge point II; the hydraulic cylinder is connected with an oil path which is branched from a pressure accumulator and is provided with an electromagnetic valve for controlling closing of the oil path; the pressure accumulator is connected with an electric hydraulic pump of an anti-lock braking system (ABS) of the automobile and connected with a hydraulic oil tank through the oil path; and the electromagnetic valve is connected with a controller of the ABS of the automobile and directly leads to the hydraulic oil tank through a reflux oil path. The system has the advantages of simple structure, reliable work, small size and low manufacturing cost.
Owner:尹梦晨

Front-end collision energy absorption system of non-loading type light truck

ActiveCN106005021AChange section shapeChange sizeUnderstructuresRight triangleEnergy absorption
The invention discloses a front-end collision energy absorption system of a non-loading type light truck. The front-end collision energy absorption system comprises a girder front-end energy absorption beam, a girder front-end secondary energy absorption beam and a cab front-end energy absorption longitudinal beam, wherein the girder front-end energy absorption beam comprises an energy absorption beam web plate and an energy absorption beam outer plate; a light-truck girder is cut off from the position in front of a girder part bracket where a vehicle body and the girder are suspended to the position of a front anti-collision C-shaped beam and is replaced with the girder front-end energy absorption beam; the girder front-end secondary energy absorption beam comprises a secondary energy absorption inner plate and a secondary energy absorption outer plate; a right-angle triangular shape is formed by surrounding the girder front-end energy absorption beam, the girder front-end secondary energy absorption beam and the front anti-collision C-shaped beam; a front-end energy absorption longitudinal beam outer plate of the cab front-end energy absorption longitudinal beam adopts a U-shaped section-variable panel with the height which is gradually increased from front to back; the front-end energy absorption longitudinal beam outer plate is used for covering and fixing a part, located on a cab front boarding, of a cab front-end floor longitudinal beam. Under the condition that the shape is not changed and the front-end energy absorption distance is not increased, the front-end collision energy absorption effect of the non-loading type light truck is improved.
Owner:CHINA AUTOMOTIVE ENG RES INST

Bidirectional buffer speed adjustable hydraulic oil cylinder

The invention discloses a bidirectional buffer speed adjustable hydraulic oil cylinder, and belongs to the field of hydraulic cylinders. According to the technical aims to be achieved, the shape of the oil cylinder is not changed, the size and mounting space of the oil cylinder are not increased, the structure is simple, and the bidirectional buffer speed is adjustable through the hydraulic oil cylinder. According to the technical scheme adopted for achieving the technical aims, the bidirectional buffer speed adjustable hydraulic oil cylinder comprises a cylinder body; a piston and a piston rod are arranged in the cylinder body; a throttling channel is arranged on the side, back onto the piston rod, of the piston, and a first one-way valve is arranged in the middle and connected with a rodless cavity oil inlet; a rod cavity oil inlet and a second one-way valve are arranged at the rear end of the piston rod; a thickened segment is arranged on the piston rod and provided with an oil leaking groove; and the piston rod is controlled to stretch out and retract through the one-way valves, and the stretching-out and retracting speed is controlled through the throttling channel and the oilleaking groove. The bidirectional buffer speed adjustable hydraulic oil cylinder can be widely applied to the field of hydraulic cylinders.
Owner:CHANGZHI QINGHUA MACHINERY FACTORY +1

Processing method of nostoc commune

The invention discloses a processing method of nostoc commune. The processing method comprises the following steps of (1) adding water to a vortex air pump cleaning pond for soaking; (2) opening a vortex air pump for flushing, and after performing drainage, performing flushing for the second time with the vortex air pump; (3) under the condition of minus 10 to 0 DEG C, performing freezing in a refrigerating chamber, loading frozen nostoc commune in a kraft paper box, performing sealing, performing burying in loess to which diatomite is mixed, and performing purifying; (4) performing drying ina vacuum box until the water content is 18-25%; (5) loading an appropriate amount of white fused alumina powder to the kraft paper box, and burying the nostoc commune in the white fused alumina powder; (6) putting the kraft paper box in a fresh keeping cabinet with a drying agent, enabling the fresh keeping cabinet to be placed under the condition of constant temperature for 48-60 hours, and gently brushing away powder stuck to the surface of nostoc commune with a brush; and (7) performing blasting in an air box, performing drying for 12 hours, taking out the dried nostoc commune, performing cutting, and performing sorting and classifying with a sieve so as to obtain the natural nostoc commune. The condition that nutrient components of the nostoc commune do not run off is guaranteed to themaximum extent, original appearance, shape and color are maintained, and the product quality is improved.
Owner:浙江宜佳向阳超市有限公司

Prestressed concrete beam and prefabricating method

The invention relates to the technical field of prestressed structures, and discloses a prestressed concrete beam and a prefabricating method. The prestressed concrete beam comprises a prestressed tendon, a protective device and an anti-corrosion material; the prestressed tendon comprises a prestressed failure section and a prestressed effective section; the protective device comprises a protective sleeve and a spiral stirrup, wherein the protective sleeve sleeves the prestressed failure section, and the spiral stirrup sleeves the protective sleeve and part of the prestressed effective section; and the protective sleeve is filled with the anti-corrosion material. The prestressed concrete beam prefabricating method is used for prefabricating the prestressed concrete beam. According to the beam and the method, the prestressed failure section and concrete are isolated through the protective sleeve, so that the prestressed failure function is realized; meanwhile, the protective sleeve canserve as a common steel bar, the anti-cracking effect of the protective sleeve is exerted; and the spiral stirrup sleeves the prestressed effective section and spans the prestressed failure section and the prestressed effective section, so that the anti-cracking performance of a concrete stress mutation area is enhanced.
Owner:南京博瑞吉工程技术有限公司

Prefabrication method of prestressed concrete beam and prestressed concrete beam

PendingCN110565508ADoes not affect gripTo achieve anti-corrosion purposesCeramic shaping apparatusBridge structural detailsPrestressed concrete beamEngineering
The invention relates to the technical field of prestress structures, and discloses a prefabrication method of a prestressed concrete beam and the prestressed concrete beam. The prefabrication methodof the prestressed concrete beam comprises the steps that S1, a protection device is mounted on a prestressed tendon needing forced prestress failures and is used for isolating the prestress failure segment of the prestressed tendon from concrete; S2, the tensioning force of the prestressed tendon is released; S3, the protection device is filled with an anti-corrosion material, and the prestressedtendon is wrapped; and S4, the end of the cutoff prestressed tendon is blocked. The protection device is mounted on the prestressed tendon needing forced prestress failures and isolates the prestressfailure segment of the prestressed tendon from the concrete so as to achieve the prestress failure function, the prestressed tendon can serve as a common steel bar, and the anti-crack function of theprestressed tendon is achieved; and the protection device is filled with the anti-corrosion material, the prestressed tendon is wrapped so as to achieve the anti-corrosion aim of the prestressed tendon, the durability performance of the prestressed tendon is improved, and then the anti-crack performance of the concrete is improved.
Owner:南京博瑞吉工程技术有限公司

Web arch structure reinforced by frame type reinforcing structure

The invention discloses a web arch structure reinforced by a frame type reinforcing structure, which comprises a web arch. The web arch is provided with a reinforcing structure, the reinforcing structure comprises a longitudinal rib and a diaphragm plate, the longitudinal rib is poured at the arch top part of the inner side of the web arch along the longitudinal direction of the web arch, and the diaphragm plate is fixedly poured at the inner side of the web arch along the spanning direction of the web arch, and the diaphragm plate and the longitudinal ribs are poured and connected into a whole to form a space reinforcing frame structure of the web arch. A reinforced space frame structure is formed, and the resistance of the web arch structure for resisting various load effects is obviously improved; the main reinforcing steel bars of the reinforced diaphragm plate can effectively restrain the opening deformation of the web arch under load and prevent the expansion of the midspan vertical crack of the web arch; construction is relatively easy and convenient, compared with a reinforced concrete reinforced web arch, the material consumption and the dead weight of the reinforced structure are remarkably reduced, the better reinforcing effect is achieved, damage to the original web arch caused by reinforcing embedded steel bars is reduced, and on-site reinforcing construction operation is remarkably reduced; and compared with sticking of carbon fibers or steel plates, the web arch reinforcing effect is remarkably improved.
Owner:SHENZHEN UNIV

Oriented fiber reinforced cementing connection method

The invention provides a directional fiber reinforced glue joint connection method, and belongs to the technical field of composite material part connection. Drilling holes in the end surfaces of the connecting ends of the two adjusting sheets; the ends of the carbon fiber filaments are coated with an adhesive; inserting carbon fiber tow guide ends into the holes in the butt joint end faces of the two adjusting sheets, guiding the carbon fiber tow to form a directional fiber bundle between the adjusting sheets through the holes in the two ends, and tensioning the fiber bundle to enable the two ends of the adjusting sheets to be aligned; filling the filler into a cavity formed after the two adjusting sheets are folded, removing the adhesive tapes on the adjusting sheets after the filler is cured, and performing surface treatment on the outer surfaces of the butted parts of the adjusting sheets; cutting the carbon fiber fabric according to the size of the polishing area; and preparing a two-component epoxy resin adhesive, infiltrating the carbon fiber fabric with the adhesive, and laying the carbon fiber fabric by taking the butt seam of the adjustment sheet as the center. And the strength of a connected composite material structural part can be effectively guaranteed, changes of structural attributes are reduced, the manufacturing cost is low, implementation is convenient, and the method is used for connecting composite material parts.
Owner:HARBIN
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