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439results about How to "Stable job" patented technology

Method and device for improving forming quality of laser additive manufacturing thin-wall parts

The invention provides a method and device for improving the forming quality of laser additive manufacturing thin-wall parts. The device comprises a movable platform system, a laser metal deposition system, an auxiliary forming system, an active cooling system and a central control system. According to the forming method, when the laser metal deposition system conducts cladding forming on the thin-wall parts, the auxiliary forming system controls the thin-wall thicknesses and the forming directions in real time; when the multiple layers of the thin-wall parts are deposited, the problem of molten pool flowing caused by interlayer stacking can be solved, and the problem that the surface roughness in the thin-wall forming process is excessively large due to interlayer stacking is solved, andthe thickness-changeable thin wall, the flat thin wall and the curved thin wall are machined; and meanwhile, the active cooling system cools deposited layers in real time. The problems that the quality of the laser cladding formed surfaces is low; during continuous multiplayer depositing, the temperature is increased, therefore, thermal stress of the deposited layers is accumulated, consequently the deposited layers are cracked, and microstructures of the deposited layers are coarse; and the forming efficiency is low due to slow cooling are solved, and high-quality and efficient forming of thecomplex thin-wall parts is achieved.
Owner:JIANGSU UNIV

Elastic rail fixing device

ActiveCN103088723AStable jobReasonable lateral stiffness and anti-yaw stiffnessRail fastenersHigh polymerTransverse vibration
The invention relates to rail accessories, in particular to an elastic rail fixing device. The elastic rail fixing device is disposed on a base of a sleeper, fixedly connected with the sleeper through anchoring bolts and characterized by further comprising a guide component and a vertical support element. The guide component comprises guide elements and a guide supports, wherein the guide elements are disposed on two sides of a rail wed of a steel rail, and the guided elements are clamped by the guide supports. Each guide element comprises at least part of elastic high polymer material or/and a metal spring. Relative motion between the steel rail and the guide supports is achieved by the aid of elastic deformation of the guide elements. Transverse rigidity, along the steel rail, of each guide element is at least 2.5 times higher than vertical rigidity, along the steel rail, of each guide element. Vertical rigidity of the vertical support element is not lower than that of each guide element. The elastic rail fixing device has the advantages that vertical rigidity is guaranteed while high transverse rigidity is achieved, under the circumstance that vibration isolation effect is guaranteed, rail gauge variation is smaller, transverse vibration of wheel tracks is smaller, transverse shaking of trains is smaller, mutual transverse sliding between the wheel tracks is smaller, abrasion is low, and comfortableness and safety of trains are higher.
Owner:QINGDAO CREATE ENVIRONMENT CONTROL TECH +1

Damp-proof corrosion-resistant inflaming-retarding electric power communication cable

The invention discloses a damp-proof corrosion-resistant inflaming-retarding electric power communication cable which comprises a conductor and an insulating layer. A plurality of cable cores are arranged in the conductor which is arranged in a PVC plastic connecting rod, and a gap between the PVC plastic connecting rod and the conductor is filled with a waterproof filling layer; aluminum alloy hoses are arranged at the center of the PVC plastic connecting rod, and the insulating layer wraps the PVC plastic connecting rod in an extruding mode; a gap between the insulating layer and the PVC plastic connecting rod is filled with fillings; a shielding layer tightly wraps the insulating layer in an extruding mode; a reinforcement layer, a stainless steel armor layer and an aluminum-polythene adhesive protection layer sequentially tightly wrap the shielding layer in an extruding mode from inside to outside; an aluminum alloy interlocked armor barrier layer wraps the aluminum-polythene adhesive protection layer in an extruding mode; a plurality of current guide cores are evenly arranged in the aluminum alloy interlocked armor barrier layer; an inner sheath and an outer sheath are sequentially arranged outside the aluminum alloy interlocked armor barrier layer. The damp-proof corrosion-resistant inflaming-retarding electric power communication cable has the advantages of being good in damp-proof effect, good in corrosion resistance, long in service life, and the like.
Owner:南通上汇新材料有限公司

Disposable high-speed turbo dental-drill hand set

ActiveCN101310691AStable jobOvercome the defect of sheddingDental toolsBoring toolsImpellerDental drill
The invention discloses a disposable high speed turbine dental drill handpiece which comprises a head and a handle, wherein, the head consists of a head shell, a connecting shaft impeller in the head shell and a rolling bearing arranged between the connecting shaft impeller and the head shell; an aqueous vapor channel in the handle leading to the rolling bearing at the head is common steel material; the head shell, the connecting shaft impeller and the handle are plastic; the rolling bearing comprises an upper rolling bearing and a lower rolling bearing, wherein, the outer surface of the upper rolling bearing is a pyramidal structural surface; a gasket is arranged between the pyramidal structural surface of the upper rolling bearing and a inverted pyramidal structural surface of the head shell; the structure of the corresponding lower rolling bearing, the gasket and the head shell is symmetrical with the structure of the upper rolling bearing; the head shell is cemented by a head shell body and a head shell cover; the physical neck of the head shell body is internally provided with an air intake channel and a return air channel which lead to the interior of the head shell and is also provided with a water spraying channel leading to the lower part of the head; the tail end of the handle is an aqueous vapor quick-connect plug; the physical neck of the head shell body is cemented with the head end of the physical handle; the air intake channel, the return air channel and the water spraying channel in the physical neck of the head shell body and the head end of the physical handle are correspondingly communicated with each other. The disposable high speed turbine dental drill handpiece lowers cost.
Owner:李晓平 +1

Flexible suspension lifting and translating device for X-ray imaging and shooting detection

The invention relates to a flexible suspension lifting and translating device for X-ray imaging and shooting detection of a large-scale tested workpiece. The device has the structures as follows: four light-weight conveyer belts with the same length and width are respectively winded on four scrolls with the same diameter; four scrolls are arranged on the same horizontal line shaped like a Chinese character kou; bevel gears with the same gear number are meshed with each other at 90 degrees; a driving scroll is connected with a reducer motor and is sequentially meshed with other three driven scrolls through the bevel gear; one end of the light-weight conveyer belt is retracted on the four scrolls and the other end is connected with a ray tube unit and an X-ray tube device; a cross beam and a rail are arranged close to a ceiling of a flaw detection chamber; crossbeam running gears are arranged at both ends of the crossbeam; and the rail is fixed on a wall through a bracket. Four light-weight conveyer belt retraction mechanisms ensure smooth declination of the X-ray tube or an image enhancer and balance of translation in the axle-x and axle-y directions, are beneficial to improving the X-ray imaging precision, and have small volume, reasonable moving orbit and reduced space.
Owner:DONGDAN AOLONG RADIATIVE INSTR GRP

Excitation system full-function-performance simulation system based on MATLAB

The invention discloses an excitation system full-function-performance simulation system based on an MATLAB. The system comprises an electricity generator, auxiliary power, a main transformer, a short trouble setting unit, a circuit, an AVR unit, a PSS unit, a machine end voltage effective value computing module, a stator overcurrent limiting unit, a rotor overcurrent limiting unit and a low-excitation limiting unit. Some parameters of the electricity generator are input to the AVR unit. The AVR unit outputs adjusted electricity generator voltages to the electricity generator. Output of the electricity generator is connected to auxiliary power and the main transformer. Output of the main transformer is connected with a power grid through the circuit. Output of the main transformer is connected with the short trouble setting unit. The stator overcurrent limiting unit, the rotor overcurrent limiting unit and the low-excitation limiting unit carry out control processing on the parameters of the electricity generator. According to the system, an excitation system simulation model which is complete in function and practical is established first through the MATLAB, the connecting modes of the units are flexible and selectable and strong in representativeness, and simulation requirements of excitation regulators of different structures can be met.
Owner:STATE GRID CORP OF CHINA +1

Temperature difference generator utilizing residual heat of tail gas of automobile

The invention relates to a temperature difference generator utilizing the residual heat of the tail gas of an automobile, belonging to the technical field of regenerative energy. The device comprises a heat collection device, temperature difference power generation pieces and a cooling water tank. The connection of the device is in such a way that the surface of the heat collection device is provided with at least one temperature difference power generation piece, the hot end of each temperature difference power generation piece is connected with the side face of the heat collection device, and the cold end of each temperature difference power generation piece is connected with the cooling water tank. The temperature difference generator has the advantages that the heat collection device is adopted to carry out the heat collection of the residual heat of the tail gas and provide high temperature for the temperature difference power generation pieces, the cooling water tank is used for carrying out heat radiation on the cold ends of the temperature difference power generation pieces, the effect of heat radiation is good, the heat radiation is free from the influence of the outside temperature and seasonal variations, the temperature of the cold ends of the temperature difference power generation pieces keeps constant, and the temperature difference power generation pieces have stable work, simple structure, low cost, convenient use, stable performance and high energy production efficiency.
Owner:NORTHEASTERN UNIV

Pot seedling wide and narrow row spacing transplanting mechanism adopting seven non-standardize cone bevel gear planetary gear train

ActiveCN103410921AStable jobShorten the green cycleToothed gearingsTransplantingGear ratioEngineering
The invention discloses a pot seedling wide and narrow row spacing transplanting mechanism adopting a seven non-standardize cone bevel gear planetary gear train. Identical gear boxes are fixed onto two ends of the central shaft of a transmission box; the central axis is sleeved with a central non-conic bevel gear of each gear box; each gear box is fixedly connected with the transmission box through a castellated flange; each central non-conic bevel gear is meshed with a first central non-conic bevel gear fixedly mounted on the central shaft, and drives a second central non-conic bevel gear coaxially mounted with the first central non-conic bevel gear to rotate; the second central non-conic bevel gear is meshed with a planetary non-conic bevel gear fixedly mounted on a planetary shaft; the shaft angle between the central shafts and the shaft angle between the planetary shaft and the central shaft are both sharp angles; after a seedling is taken by a seedling taking claw on a transplanting arm, the seedling pushing point deflects from the seedling taking point leftwards or rightwards for a certain distance to realize pot seedling wide and narrow row spacing transplanting. The overall gear ratio curve of a secondary gear mesh has two peaks which facilitate the forming of an '8'-shaped or sharp-angle-shaped spatial motion track for the seedling taking claw.
Owner:临泉县联正电子商务有限公司
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