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197results about How to "Improve mechanical efficiency" patented technology

Continuous feeding device for electric arc furnace preheated by flue gases

The invention discloses a continuous feeding device for an electric arc furnace preheated by flue gases. The device comprises a double-duct conveying trough and a flue gas guiding hood; a carrier plate with a flue gas channel is arranged in the middle part of the double-duct conveying trough; a material circulating duct is arranged above the carrier plate, and a flue gas circulating duct is arranged below the carrier plate; a seal gate matched with the upper opening of the lower end of the material circulating duct is arranged on the flue gas guiding hood; the double-duct conveying trough forms a flue gas diffusion heat exchanging mechanism from bottom to top, contact area between materials and high temperature flue gas is enlarged, the stay time of the flue gas is long, and the material preheating effect is greatly improved; as the double-duct conveying trough is arranged in an inclined way, the feeding point is raised, the trough bevel is large, the waste steel material blanking point can easily close to the center high temperature area of the furnace, so that the cold area phenomenon is eliminated; as the diffusion and heat exchange designs are realized, the powder dust in the exhausted flue gases is greatly reduced, the flue gas flowing is more in line with the natural rules, and the problems of exhaust pipe blockage and the like are solved.
Owner:CISDI ENG CO LTD

Catapult of flywheel-type high-speed unmanned aerial vehicle

The invention relates to a launcher of an unmanned aerial vehicle, in particular to a catapult of an unmanned aerial vehicle. According to the technical scheme of the catapult of the flywheel-type high-speed unmanned aerial vehicle, the unmanned aerial vehicle is arranged on a tackle and located at a launching position before being launched, a clutch in a power system is in a disconnected state, a motor drives a flywheel to rotate, and the rotating speed is set according to launching requirements; when the unmanned aerial vehicle is launched, the clutch of the power system is connected, the flywheel drives a winding wheel to rotate, a traction rope is wound into the winding wheel and drives the tackle and the unmanned aerial vehicle to move in an accelerated mode, when the tackle moves to a tackle position sensor, the clutch is controlled to be disconnected, the tackle continues to move forwards and is blocked by a blocking device, the winding wheel stops rotating, and the unmanned aerial vehicle flies out accordingly; after launching is finished, the tackle is pulled back to the initial launching position. According to the catapult of the unmanned aerial vehicle, the flywheel serves as an energy storage element and can rapidly accelerate the unmanned aerial vehicle to a large speed on a very short track, and catapult launching of the unmanned aerial vehicle with a high speed requirement is achieved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Small reverse osmosis seawater desalting system with energy reclaiming high-pressure pump

The invention discloses a small reverse osmosis seawater desalting system with an energy reclaiming high-pressure pump. The high-pressure pump comprises a low-pressure raw water inlet, a high-pressure raw water outlet, a high-pressure thick water inlet, a low-pressure thick water discharge port, a plunger pump head for boosting raw water, a double-extension shaft motor and a plunger motor for reclaiming energy of reverse osmosis high-pressure thick water, wherein the plunger pump head, the double-extension shaft motor and the plunger motor share a rotating shaft. A seawater desalting device at least comprises a water suction pump, a pretreatment assembly and a reverse osmosis membrane assembly. A process comprises that: after seawater is pretreated, enters the high-pressure pump and is boosted, the sweater enters a reverse osmosis membrane pressure container from the high-pressure raw water outlet, fresh water after desalting of a reverse osmosis membrane is produced water, the thick salt water from the reverse osmosis pressure container enters the high-pressure pump and residual pressure is reclaimed, and the low-pressure thick salt water after the residual pressure is reclaimed is discharged from the low-pressure thick water discharge port of the energy reclaiming high-pressure pump. The system can reclaim and utilize the energy of the reverse osmosis high-pressure thick water at the same time of boosting the raw water so as to reduce the energy consumption of a reverse osmosis system.
Owner:TIANJIN BLUE CROSS MEMBRANE TECH CO LTD

Reduction gear with combination of gear change structure and eccentric cycloidal roller pin gear change structure

The invention relates to a gear eccentric cycloidal roller pin reduction gear, in particular to a reduction gear with the combination of a gear change structure and an eccentric cycloidal roller pin gear change structure. A composite 2-level reduction gear with the combination of a planetary gear structure and an eccentric roller pin structure is designed. The reduction gear is composed of an input part, a speed reduction part and an output part. The reduction gear is characterized in that a spur gear planetary mechanism without an outer gear ring is used for first level speed reduction, a sun gear on the input shaft drives three planetary gears to be used for achieving first level speed reduction, a pair of double-eccentric structure which is misplaced by 180 degrees is arranged on the three planetary gears, and two bearings, namely rotating arms, are arranged on each segment of eccentric cylinders to be used for driving two cycloidal gears to rotate. The reduction gear has the advantages of being high in reduction ratio and high in efficiency, the single-level transmission can reach the reduction ratio of 1:3, the efficiency reaches 90%, and if multi-level transmission is adopted, the reduction ration will be greater.
Owner:四川奥斯廷科技有限公司

Three-dimensional flapping flapping-wing drive mechanism

InactiveCN104477383AReduced number and structural weightImprove mechanical efficiencyOrnithoptersFlapping wingGear wheel
The invention relates to a three-dimensional flapping flapping-wing drive mechanism which comprises a rack, a motor, a reduction gear unit, linkage guide rods, spherical hinged support connecting rods and rocker arms, wherein the motor and the reduction gear unit are directly mounted on the rack, the upper surfaces of the linkage guide rods are inclined planes and are hinged with the middles of the rocker arms; the top of the rack is fixedly connected with a spherical hinge; one ends of the rocker arms are also fixedly connected with a spherical hinge; two ends of the spherical hinged support connecting rods are fixedly connected with a spherical hinged support, wherein one ends of the spherical hinged support connecting rods are connected with the spherical hinge on the rack, and the other ends of the spherical hinged support connecting rods are connected with the spherical hinge on the rocker arm. The flapping-wing drive mechanism is simple in structure and light in weight, the rocker arm can realize symmetric three-dimensional flapping under the condition that the mechanism dimension is very small, so that the flapping-wing can produce strong pneumatic force, has the relatively good pneumatic efficiency, and can be relatively well applied to a flapping-wing aircraft to obtain a relatively good flight performance.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Electromagnetic torque clutch

The invention provides an electromagnetic torque clutch. The electromagnetic torque clutch comprises an input shaft, an input wheel, an electromagnetic coil, an output shaft and an output wheel fixedto the output shaft. The input wheel is provided with a plurality of radial long grooves extending in the radial direction. A swing rod is arranged in each radial long groove. A spherical fulcrum is fixedly arranged in the middle of each swing rod. One end of each swing rod penetrates through a guide ball. The other end of each swing rod is fixedly provided with a permanent magnet. The output shaft and the input shaft are arranged coaxially. The output wheel is closely attached to the input wheel. The radial long grooves face the output wheel. The surface, facing the input wheel, of the outputwheel is provided with a plurality of grooves. Each groove is opposite to the corresponding radial long groove to form a track groove allowing the corresponding guide ball to roll in. Under the action of an electromagnetic field of the electromagnetic coil, the functions of connection and disconnection of dynamic power in an automobile power transmission system are achieves through left-right swinging of the swing rods, and the requirement for the stability of dynamic torque transmission of the automobile power transmission system is met.
Owner:SHANGHAI GKN DRIVE SYST

Turbine type stirrer used for molten iron mechanical stirring desulfuration

InactiveCN101857912AIncrease the areaIncrease stirring radial thrustVertical planeMetallurgy
The invention discloses a turbine type stirrer used for molten iron mechanical stirring desulfuration, comprising a rotating shaft, a wheel hub and three stirring vanes, wherein, each stirring vane comprises a stirring vane metal core and is evenly distributed at the periphery of the wheel hub; the surface facing melt iron, the surface deviating melt iron and the side face of the stirring vane are all inclined planes inclining forwards from bottom to top, and the angles of inclination alpha, beta and gamma respectively satisfy the following conditions: alpha is more than or equal to 1 degree and less than or equal to 10 degrees, beta is more than or equal to alpha and less than or equal to 15 degrees, and gamma is more than or equal to 0 degree and less than or equal to 3 degrees; the stirring vane metal core is in eccentric arrangement; the flat surface on which the thickness symmetry plane of the stirring vane metal core is located is a first vertical plane; the flat surface parallel to the first vertical plane and passing the centre line of the rotating shaft is a second vertical plane; the first vertical plane is overlapped with the second vertical plane horizontally moving a distance of L towards the direction of the surface facing melt iron, wherein, L satisfies the condition that L is more than 0 and less than or equal to (d-a)/2; d is the diameter of the metal core of the rotating shaft; and a is the thickness of the stirring vane metal core; by applying the invention, the stirring power consumption of the invention is low, the sticky dregs between the stirring vanes are less; and the dynamical condition of stirring desulfuration is good.
Owner:武钢集团有限公司

Shock-absorption buffer shaft and application

The invention relates to a shock-absorption buffer shaft. The shock-absorption buffer shaft comprises an input shaft, an input end cover, a force transfer pin, an input toothed sleeve, an input toothed wheel, a double toothed wheel, a spring, an output toothed sleeve, an output toothed wheel, an output shaft, an output end cover, a limiting bolt, a fastening bolt and an external sleeve. Force is transferred to the input toothed sleeve by virtue of the teeth of the first internal toothed ring of the input toothed sleeve in a manner of compressing a spring through the teeth of an external toothed ring on the input toothed wheel, later the force is transferred to the double toothed wheel by virtue of the teeth of the first external toothed ring of the double toothed wheel in a manner of compressing the spring through the teeth of the second internal toothed ring of the input toothed sleeve, then the force is transferred to the output toothed sleeve by virtue of the teeth of the first internal toothed ring of the output toothed ring in a manner of compressing the spring through the teeth of the second external toothed ring of the double toothed wheel, and then the force is transferred to the output toothed wheel by virtue of the teeth of the external toothed ring of the output toothed wheel in a manner of compressing the spring through the teeth of the second internal toothed ring of the output toothed sleeve, and finally, the output toothed wheel is used for transmitting the torque by virtue of the force transfer pin through the output shaft.
Owner:金余和

Opened circulating Stirling engine

The invention relates to an opened circulating Stirling engine comprising a hot-end cylinder, a hot-end piston, a regenerator, a cold-end cylinder and a cold-end piston. The regenerator is an one-way regenerator, the cold-end inlet and hot-end outlet of the one-way regenerator form a low-temperature medium channel, and the hot-end inlet and cold-end outlet form a high-temperature medium channel; the cold inlet of the cold-end cylinder is communicated with the air, and the cold outlet is communicated with the cold-end inlet of the one-way regenerator; the hot inlet of the hot-end cylinder is communicated with the hot-end outlet of the one-way regenerator, and the hot outlet is communicated with the hot-end inlet of the one-way regenerator; the cold-end outlet of the one-way regenerator is communicated with the air. The circulating medium adopts the one-way flowing manner, the heat exchanging manner is optimized, and the regenerating efficiency is improved; an absolute sealing device for a power piston and an expanding piston is omitted, the friction resistance is reduced greatly, and engine mechanical efficiency is improved; meanwhile, the medium is of the air, the operating pressure and temperature are low, expensive temperature-resistant material is omitted, cost is low, reliability is high, energy is saved, and environment is protected.
Owner:HEFEI UNIV OF TECH
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