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30results about How to "Little impact on structural strength" patented technology
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Building pillar removing device and method
InactiveCN106121272AGuaranteed structural strengthLittle impact on structural strengthBuilding repairsBuilding material handlingHydraulic cylinderPre stress
The invention discloses a building pillar removing device and method. The building pillar removing device and method aim to overcome the defects that after existing house building pillars are removed, the influence on the structural strength of a house is large, the supporting strength at the pillar removing position of the house is lowered, and then the service life of the house is shortened. Before the pillars are removed, surrounding pillars and a cross beam or a floor need to be subjected to prestress concrete reinforcement, prestress steel strands are installed in prestress concrete, and each prestress steel strand penetrates through self-locking sleeves on self-locking plates and then the self-locking sleeves are backwards compressed; then jacking hydraulic cylinders are installed on the self-locking plates, and each prestress steel strand penetrates through locking sleeves on jacking plates and the locking sleeves are backwards compressed, so that the prestress steel strand is tightly clamped in the locking sleeves; and the jacking hydraulic cylinders at the two ends of the steel strands are started synchronously and push jacking pistons to outwards tension the prestress steel strands, and when it is detected that pressure borne by the pillars to be removed is within the safety removing range, the pillars to be removed are cut off and removed.
Owner:GEOTECHN TECH
Cantilever crane device and engineering machinery
InactiveCN102605958AImprove cloth flexibilityOvercoming technical deficienciesBuilding material handlingCantileverMechanical engineering
The invention provides a cantilever crane device, which is used for engineering machinery and comprises a first knuckle arm and a second knuckle arm. A transfer connection arm is arranged between the first knuckle arm and the second knuckle arm, one end of the transfer connection arm is hinged with the first knuckle arm via a first hinging shaft, the other end of the transfer connection arm is hinged with the second knuckle arm via a second hinging shaft, the axis of the first hinging shaft is perpendicular to that of the second hinging shaft, a first driving mechanism is disposed between the first knuckle arm and the transfer connection arm and can drive the transfer connection arm to rotate around the first hinging shaft, and a second driving mechanism is disposed between the transfer connection arm and the second knuckle arm, and can drive the second knuckle arm to rotate around the second hinging shaft. The invention further provides the engineering machinery. In the technical scheme, a cantilever crane can swing in a vertical direction and / or a horizontal direction by the aid of the transfer connection arm, flexibility is greatly improved, when the cantilever crane rotates within a small range, a rotary table does not need to be started, more energy is saved, and construction cost is reduced.
Owner:SANY AUTOMOBILE MFG CO LTD
Vertical-axis magnetic levitation tidal current energy power generation device and method in combination with offshore horizontal-axis wind turbine tower barrel
ActiveCN111425354ARealize co-generationIncrease profitWind energy with water energyWind motor supports/mountsMagnetic polesSeawater
The invention provides a vertical-axis magnetic levitation tidal current energy power generation device and method in combination with an offshore horizontal-axis wind turbine tower barrel. The vertical-axis magnetic levitation tidal current energy power generation device comprises a central unit, a magnetic levitation rotor unit and a supporting unit, wherein the central unit comprises the horizontal-axis wind turbine single-pile tower barrel and a stator winding. The single-pile tower barrel is fixed to a seabed. The stator winding sleeves the outer wall of the single-pile tower barrel. Themagnetic levitation rotor unit is suspended around the annular stator winding under the action of the supporting unit. The supporting unit is a closed-loop rail with a T-shaped section and is correspondingly arranged below the magnetic levitation rotor unit and fixed to the seabed around the single-pile tower barrel. When a sea tide rises or falls, sea currents push blades to rotate, and magneticpoles of a permanent magnet in the rotor unit are rotated. At the moment, the stator winding installed on the outer wall of the wind turbine single-pile tower barrel converts tidal current kinetic energy into electric energy by cutting rotating magnetic induction lines, and the under-sea tidal current energy power generation method is added on the basis of an existing offshore wind energy power generation system, so that the comprehensive utilization rate of offshore energy is effectively increased.
Owner:XIAN THERMAL POWER RES INST CO LTD
Aircraft hardpoint sealing mechanism driven by springs
InactiveCN105109662ADoes not affect aerodynamic performanceSimple structureAircraft accessoriesEngineeringMechanical engineering
The invention discloses an aircraft hardpoint sealing mechanism driven by springs. The aircraft hardpoint sealing mechanism comprises a casing (1), wherein a positioning ring (11) vertically extends upwards from the upper top surface of the casing (1), two sealing plates (5) which can be mutually connected in an abutting manner, springs (6) for driving the sealing plates (5) to close and handles (8) through which the sealing plates (5) can be opened are arranged in the positioning ring (11), and a lower hole (10) corresponding to the sealing plates (5) is formed in the middle part of the casing (1); a cover plate (4) is fixed on the positioning ring (11), and an upper hole (12) corresponding to the lower hole (10) is formed in the cover plate (4). The aircraft hardpoint sealing mechanism disclosed by the invention is simple in structure andconvenient to use, after the aircraft hardpoint sealing mechanism is closed, the casing and the sealing plates are completely flush with the outer surface of an aircraft and not protruded out of the surface of the aircraft completely, and aerodynamic performances of the aircraft are not influenced.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Self-cooling vertical stone machining tool and manufacturing method thereof
InactiveCN108789856AImprove cutting performanceAvoid excessive heatStone-like material working toolsPolycrystalline diamondEngineering
The invention provides a self-cooling vertical stone machining tool and a manufacturing method thereof. The self-cooling vertical stone machining tool comprises a tool body and a tool handle, whereina main blade and an auxiliary blade are arranged on the tool body, a main cooling hole is formed in the tool handle, the main cooling holes are blind holes which extend into the tool body in depth, aplurality of auxiliary cooling holes extending outwards along the radial direction of the tool handle are formed in the inner wall of the main cooling hole; the manufacturing method comprises the following steps of preparing a tool blank through a sintering or chemical vapor deposition method, milling a spiral groove by using a milling machine, a main cutting edge and an auxiliary cutting edge aremachined through grinding and grinding, and a main cooling hole and an auxiliary cooling hole are machined through an electric spark punching machine. According to the adoption of the technical scheme, the polycrystalline diamond material has high hardness, the cutting performance of the tool is greatly improved, the cooling liquid flows through the main cooling hole and the auxiliary cooling hole to cool the tool, the situation that the local area of the tool is excessively heated is avoided, the tool is protected, the service life of the tool is prolonged, the structural strength of the tool is high, and the workpiece machining quality is improved.
Owner:安顺市杰勇石业有限公司
Enhanced heat transfer resistance reduction energy-saving heat exchange plate for broken line type printed circuit plate heat exchanger
PendingCN112179179AUniform pressure distributionReduce working fluid pressure dropHeat exchanger casingsStationary plate conduit assembliesPlate heat exchangerJet flow
The invention provides an enhanced heat transfer resistance reduction energy-saving heat exchange plate for a broken line type printed circuit plate heat exchanger. The enhanced heat transfer resistance reduction energy-saving heat exchange plate for the broken line type printed circuit plate heat exchanger comprises a heat exchange plate body with a plurality of broken line flow channels arrangedin parallel on the surface; and balance enhancing seams are processed at the bent corners of the broken line flow channels. The balance enhancing seams and the broken line flow channels provided by the invention are integrally machined and formed through a chemical etching process, therefore, the machining is easy, the structure is firm, and the economical efficiency is good; the balance enhancing seams can achieve low-speed jet flow among the flow channels, so that a backflow area is damaged, the heat transfer is enhanced, and meanwhile, pressure distribution in all the flow channels is moreuniform, flow distribution among all the parallel flow channels is more uniform, and therefore, the working medium pressure drop in the flow channels is reduced, and the efficiency of the heat exchanger is further improved; and meanwhile, the influence of the balance enhancing seams on the structural strength of the heat exchanger is small, so that the high pressure bearing capacity can be continuously kept.
Owner:SOUTHEAST UNIV +1
Lens connecting structure of rimless eyeglasses and rimless eyeglasses using lens connecting structure
PendingCN107065216AIncreased frictionSecure connectionSpectales/gogglesLens assembliesEngineeringNose bridge
The invention discloses a lens connecting structure of rimless eyeglasses and rimless eyeglasses using the lens connecting structure, which belong to the field of the eyeglasses structure. The lens connecting structure disclosed by the invention comprises connecting holes formed in lenses and insertion tabs which are arranged on pile tips or a nose bridge and can be tightly inserted in the connecting holes in a matched manner to stop rotation, wherein an opening is formed in the middle part of each insertion tab along an insertion tab inserting direction, teeth are at least arranged on external sidewalls of the two sides of each insertion tab, and glue or fastening plugs are further arranged in the openings of the insertion tabs. The invention further discloses the rimless eyeglasses. According to the lens connecting structure of the rimless eyeglasses and the rimless eyeglasses using the lens connecting structure, the insertion tabs on the pile tips or the nose bridge of the eyeglasses are in close fit with the connecting holes in the lenses, the friction action between the insertion tabs and the connecting holes is improved by using the teeth on the external sidewalls of the two sides of each insertion tab, and a locking fixing force between the insertion tabs and the connecting holes is increased by arranging the glue or fastening plugs are in the openings of the middle parts of the insertion tabs, so that the lenses of the rimless eyeglasses are firm and reliable in connection and are not prone to loosening; the lens connecting structure has the advantages of simple structure, convenience and quickness in manufacturing and assembling, and the like, so that the manufacturing cost of the rimless eyeglasses is effectively reduced.
Owner:马锋
Aircraft hardpoint sealing mechanism driven by motors
The invention discloses an aircraft hardpoint sealing mechanism driven by motors. The aircraft hardpoint sealing mechanism comprises a casing (1), wherein a hanging frame hole (12) is formed in the casing (1), and two sealing plates (9) matched with the casing (1) in a rotating manner are mounted on the bottom surface of the outer sides of the casing (1) respectively and positioned on two sides of the hanging frame hole (12) respectively; a step motor (2) driving the sealing plates (9) to rotate and two opposite-transmitting type infrared sensors (4) positioned on two sides of the hanging frame hole (12) respectively are mounted on the inner side surface of the casing (1). The aircraft hardpoint sealing mechanism disclosed by the invention is simple in structure and convenient to use, when a hanging frame is mounted, the sealing plates are opened through a switch by ground staff, then the sealing plates are held in an open state, and when the hanging frame is released, the sealing mechanism is automatically closed, so that the aircraft hardpoint sealing mechanism is relatively convenient to use; because space for the sealing plates does not need to be reserved in the inner part of the casing, and plan view sizes of the sealing mechanism and a corresponding skin opening are small and slightly greater than sizes of the hanging frame, so that influence on the structural strength of the aircraft is small.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Cantilever crane device and engineering machinery
ActiveCN102704689AIncrease flexibilitySimple structureBuilding material handlingCouplingUniversal joint
The invention provides a cantilever crane device used for engineering machinery, which comprises a first section of arm, a second section of arm, a first coupling shaft, a second coupling shaft, wherein the first coupling shaft and the second coupling shaft are fixedly crossed; the axes of the first coupling shaft and the second coupling shaft are vertical to each other; two ends of the first coupling shaft are respectively rotatably mounted on the first section of arm; the two ends of the second coupling shaft are respectively rotatably mounted on the second section of arm; a first driving mechanism is mounted on the first section of arm; the first driving mechanism can drive the first section of arm and the first coupling shaft to relatively rotate; a second driving mechanism is mounted on the second section of arm; and the second driving mechanism can drive the second section of arm and the second coupling shaft to relatively rotate. The invention also provides the engineering machinery. According to the technical scheme provided by the invention, a simulated universal joint driving mode is adopted; the structure is simple; a cantilever crane can swing along the vertical and / or horizontal direction; the flexibility in distributing materials is greatly increased; a turntable is not started when the cantilever crane device is rotated in a small scope; and the energy consumption is saved.
Owner:SANY AUTOMOBILE MFG CO LTD
Rotor sheath of external rotor permanent magnet motor
InactiveCN110098676AReduce eddy current lossBlock eddy current pathMagnetic circuit rotating partsPermanent magnet motorEddy current
The invention belongs to the technical field of motor rotors, in particular to a rotor sheath of an external rotor permanent magnet motor. The motor comprises a rotating shaft and a stator which sleeves the outer wall of the rotating shaft. The rotating shaft and the stator are fixedly connected. A matching rotor is arranged on the outer side of the stator. Permanent magnets are embedded into theinner wall of the rotor. A rotor sheath is arranged in the interlayer between the permanent magnets and the stator. A spiral slot is arranged in the rotor sheath from top to bottom. Heat dissipation slots are arranged in the outer wall of the rotor sheath. The spiral slot is arranged in the rotor sheath to block the axial and circumferential eddy current paths of the sheath, so that the eddy current loss of the sheath is reduced. The spiral slot can increase the heat dissipation area of the rotor, speed up the wind in the air gap and improve the heat dissipation effect at the joint of the rotor and the rotor sheath. The processing technology of the spiral slot is less difficult, and the spiral slot can be made by simple turning. The heat dissipation slots are arranged in the outer wall ofthe rotor sheath to assist the spiral slot in heat dissipation, and thus, the heat dissipation effect is better.
Owner:HARBIN UNIV OF SCI & TECH
Repair device for road corrugated beam guardrail
PendingCN114733934ALittle impact on structural strengthGood orthopedic effectStructural engineeringMechanical engineering
A repairing device for a road corrugated beam guardrail comprises two connecting bases, the two connecting bases are fixed to two adjacent stand columns through connecting pieces respectively, two or more guide rails are arranged between the two connecting bases, active correctors are arranged on the guide rails and can move on the guide rails, and the active correctors are connected with the connecting bases through connecting pieces. The driving corrector comprises a moving platform connected to the guide rail in a sleeving mode, a correcting base is arranged on the side, close to the wave-shaped guardrail, of the moving platform, the correcting base is connected and driven by a first correcting air cylinder and can correct the wave-shaped guardrail, a correcting table is arranged on the correcting base, and the correcting table is connected with the moving platform and is fixed through a positioning piece arranged on the guide rail. The correcting base and the correcting table are used for correcting the shape and radian of the wave-shaped guardrail respectively, and different from existing equipment, the wave-shaped guardrail can be corrected on site, and repair work of the wave-shaped guardrail which has slight accidents and is not seriously damaged can be coped with.
Owner:苑斌
Method for testing dynamic fracture expansion toughness of brittle material
ActiveCN113588449AReduce structural strengthLittle impact on structural strengthMaterial strength using steady bending forcesMaterial strength using single impulsive forceDot matrixCloud atlas
The invention relates to a material performance detection method, and discloses a method for testing the dynamic fracture expansion toughness of a brittle material.The method comprises: A) preparing a sample (1) with a straight cutting groove (11), and spraying a dot matrix reference system on the observation surface of the sample; B) performing a three-point bending loading experiment on the sample, and measuring the displacement of each scatter point in the reference system along the horizontal and vertical directions by using a digital image measuring device to obtain a cloud chart of the displacement of the scatter points along the horizontal and vertical directions; C) determining geometric centers of the two fractured bodies before the sample is fractured by using a digital image measuring device and a computer through a geometric method, and determining displacements of the geometric centers along the horizontal direction and the vertical direction by combining the displacement cloud atlas; and D) calculating the unit area dissipated energy in the fracture process of the sample, and combining the performance parameters of the sample and the loading parameters of the experiment to obtain the dynamic fracture extension toughness. The method for measuring the dynamic fracture expansion toughness of the brittle material is high in measurement precision.
Owner:CENT SOUTH UNIV
A riveting tool and riveting method suitable for aircraft composite material vertical tail wing box
ActiveCN109109329BPrevent fallingMeet engineering requirementsDomestic articlesStringerControl switch
Owner:AVIC SAC COMML AIRCRAFT
Disassembling method for rivets on composite material closed tubular beam
ActiveCN114102501ASolve decompositionPrevent fallingVehicle dissasembly recoveryMetal-working hand toolsPipeClosed tube
The invention belongs to the technical field of composite material structure repair, and particularly relates to a method for disassembling rivets on a composite material closed tubular beam. The adhesion strip with proper adhesion performance and physical state is placed on the back surface of the riveting rivet in advance, so that the redundant objects such as pier heads and chippings generated by decomposing the rivet can be fixed in the adhesion strip instead of falling into the pipe beam part. The invention aims to solve the problem of disassembly of the rivet in the closed tubular beam, and by means of a method of forming the maintenance hole, taking out the redundant material for disassembling the rivet from the tubular beam by using the adhesive strip and blocking the hole, the redundant material such as a rivet rod, a rivet pier head and the like after the rivet is disassembled is prevented from falling into the helicopter tubular beam, so that the service life of the rivet is prolonged. Therefore, the damage to products caused by abnormal sound or long-term impact of rivet pier heads on tubular beam parts in the follow-up flying process of the helicopter is avoided.
Owner:HARBIN
Air entraining window of RAT generator
PendingCN114248937AIncrease the effective drainage areaLarge amount of bleed airPower plant cooling arrangmentsEngineeringBleed air
The invention discloses a bleed air window of an RAT generator. Comprising a supporting arm hole (2) formed in a generator supporting arm (11), and the supporting arm hole (2) is covered with a trumpet-shaped drainage cover (1). The drainage cover (1) comprises a U-shaped lip I (3), a U-shaped lip II (4), a U-shaped lip III (5), a U-shaped lip IV (6) and a hole net (9), wherein the U-shaped lip I (3) and the U-shaped lip II (4) are oppositely arranged, and the U-shaped lip III (5) and the U-shaped lip IV (6) are oppositely arranged. The U-shaped lips I-IV form a quadrilateral large-end air inlet of the drainage cover (1), a hole net (9) is arranged at a small-end air outlet of the drainage cover (1), and the hole net (9) is attached to the conical surface of the supporting arm (11) at the supporting arm hole (2). The technical problems that an existing air entraining window is complex in manufacturing process, high in machining cost and large in influence on the weight of an overall mechanism are solved.
Owner:JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
Sealing and riveting tool and sealing and riveting method applicable to composite vertical tail wing box of airplane
ActiveCN109109329ALittle impact on structural strengthImprove product qualityDomestic articlesAirplaneFastener
The invention relates to a sealing and riveting tool and a sealing and riveting method applicable to a composite vertical tail wing box of an airplane. According to a technical scheme in the invention, the sealing and riveting tool is such structured that a handle is connected with an extension tube; the extension tube is connected with a magnetic chuck; one end of a wind pipe is connected with awind-controlled switch, and the other end of the wind pipe passes through the handle and the extension tube and then communicates with the magnetic chuck; and an endoscope lens is mounted on the magnetic chuck and is connected with a display screen through a wire. As the sealing and riveting tool is employed for sealing and riveting of the composite vertical tail wing box of the airplane, a fastener can be inserted into a pre-drilled fastener hole in the enclosed wing box under the guidance of the endoscope lens, and then the wind-controlled switch on the wind pipe is turned on so as to fix stringers and / or angular pieces in an enclosed box section via the fastener. According to the invention, the assembling sequence of the wing box is rationally formulated, an endoscope is cooperatively used for observation and is manually hand-held, and the installation of fasteners between stringers and angular pieces is realized through an inherent lightening hole in the wing box, so engineering requirements are met.
Owner:AVIC SAC COMML AIRCRAFT
Front cover structure of rail vehicle head
ActiveCN104176078BRetain its own performanceLittle impact on structural strengthAxle-box lubricationRailway bodiesGlass fiberFiber
The invention relates to a front cover structure for a railway vehicle head. The front cover structure comprises a front cover mounted at the head part of a vehicle body, and the front cover is divided into a plurality of pieces which are fixedly connected together through connecting structures. The front cover structure is simple and practical in integral structure, the front cover is divided into a plurality of pieces and then is sewn, and the strength of the connecting structures among the pieces is controlled, so that the local tearing strength of the front cover made of glass fiber reinforced plastics and the structural failure deformation process under the crashing condition are effectively controlled, the tearing failure is achieved according to the design requirements in the crashing process, the tearing part is bent by the crushing force according to the design requirements, the structure doesn't damage distribution and stretching of fiber in a glass fiber reinforced plastic body, the performance of the glass fiber reinforced plastics is reserved, small influence is produced on the integral structure of the glass fiber reinforced plastic body, the design only affects the strength of local glass fiber reinforced plastics according to the working condition requirements, tearing is performed step by step according to the design requirements after crashing, and the safety design and car coupler hanging requirements are met.
Owner:CRRC QINGDAO SIFANG CO LTD
A vertical-axis maglev tidal current energy generation device and method combined with an offshore horizontal-axis wind turbine tower
ActiveCN111425354BRealize co-generationIncrease profitWind energy with water energyWind motor supports/mountsWinding machineMagnetic poles
Owner:XIAN THERMAL POWER RES INST CO LTD
A motor-driven aircraft hardpoint sealing mechanism
The invention discloses a motor-driven aircraft hardpoint sealing mechanism, which comprises a casing (1), on which hanger holes (12) are opened, and outer bottom surfaces of the casing (1) are respectively installed with A sealing plate (9) that can rotate with it, the sealing plate (9) is located on both sides of the hanger hole (12), and a stepping motor that drives the sealing plate (9) to rotate is installed on the inner surface of the housing (1) (2) and the through-beam infrared sensors (4) positioned on both sides of the hanger hole (12). The invention is simple in structure and easy to use. When the hanger is installed, the ground personnel will open the sealing plate through a switch, and then the sealing plate will remain in the open state. It is necessary to reserve space for the sealing plate inside the shell. The plane size of the sealing mechanism and the corresponding skin opening are small, only slightly larger than the size of the pylon, which has little impact on the structural strength of the aircraft.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Front cover structure for railway vehicle head
ActiveCN104176078ARetain its own performanceLittle impact on structural strengthAxle-box lubricationRailway bodiesGlass fiberFiber
The invention relates to a front cover structure for a railway vehicle head. The front cover structure comprises a front cover mounted at the head part of a vehicle body, and the front cover is divided into a plurality of pieces which are fixedly connected together through connecting structures. The front cover structure is simple and practical in integral structure, the front cover is divided into a plurality of pieces and then is sewn, and the strength of the connecting structures among the pieces is controlled, so that the local tearing strength of the front cover made of glass fiber reinforced plastics and the structural failure deformation process under the crashing condition are effectively controlled, the tearing failure is achieved according to the design requirements in the crashing process, the tearing part is bent by the crushing force according to the design requirements, the structure doesn't damage distribution and stretching of fiber in a glass fiber reinforced plastic body, the performance of the glass fiber reinforced plastics is reserved, small influence is produced on the integral structure of the glass fiber reinforced plastic body, the design only affects the strength of local glass fiber reinforced plastics according to the working condition requirements, tearing is performed step by step according to the design requirements after crashing, and the safety design and car coupler hanging requirements are met.
Owner:CRRC QINGDAO SIFANG CO LTD
Connecting device, composite wall and production method of composite wall
PendingCN110056101AReduce volumeStand steadyWallsCeramic shaping apparatusThermal insulationMechanical engineering
The invention relates to the technical field of buildings, in particular to a connecting device, a composite wall and a production method of the composite wall. The connecting device comprises a bodyand a connecting assembly which is detachably mounted on the body and used for being connected with a thermal insulation part, and support legs for guaranteeing the body to stand on a mold table is formed at one end of the body. According to the connecting device, the composite wall and the production method of the composite wall, a reinforcing mesh and a thermal insulation plate which are mountedon a first wall board through the connecting device can be overturned along with the first wall board.
Owner:SANY CONSTR TECH CO LTD
Construction Method of Long-span Cross-Aisle Applied to Segment-Lined Tunnel
ActiveCN105927233BLittle impact on structural strengthPrevent collapseMining devicesUnderground chambersCrevasseClosed loop
The invention discloses a large-span cross aisle building method applied to segmental lining tunnels. A plurality of rings of tunnel linings are sequentially dismounted at the joint portions of a built large-span cross aisle in the designing direction, expanded excavation is conducted outwards every time the tunnel linings are dismounted, then primary lining structures in a closed loop in the cross section direction at the crevasses are constructed in time after expanded excavation, secondary tunnel linings of a main tunnel and the large-span cross aisle are constructed under protection of primary lining, and building safety of the joints of the large-span cross aisle is ensured.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Compressor with radial sealing structure
PendingCN110360105ASimple processingReduce processing costsSealing arrangement for pumpsRotary piston pumpsEngineeringHigh pressure
The invention relates to a compressor. The compressor comprises a dynamic vortex disk and a static vortex disk; a dynamic disk scroll plate is formed on the dynamic vortex disk; a static disk scroll plate is formed on the static vortex disk; a plurality of labyrinth grooves are formed in the side surface of the dynamic disk scroll plate or the side surface of the static disk scroll plate; and thestarting end of each labyrinth groove is the top end part of the static disk scroll plate or the dynamic disk scroll plate. A sealing structure is formed through the plurality of labyrinth grooves andthe sealing structure has throttling and depressurizing effects on compressed air among various crescent compression cavities, so that the fact that the compressed air in a high-pressure cavity is leaked into a low-pressure cavity is avoided and the radial sealing property between the dynamic vortex disk and the static vortex disk is improved.
Owner:ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
Adjacent space propeller with tip actively blowing air
The invention discloses a near-space propeller with a propeller tip actively blowing air, and belongs to the field of propeller design. The propeller includes an air pump, an airflow duct, an air blowing port, an air intake port, an acceleration sensor and a control circuit. The air pump is located in the propeller hubs on both sides of the propeller shaft, the acceleration sensor and the control circuit are located inside the propeller hub, and the airflow duct is located in the propeller. Inside the blades on both sides of the propeller hub, air blowing ports are respectively provided on the lower surfaces of the propeller tips at both ends of the propeller, and air inlets are respectively provided on the windward surfaces of the propeller hub on both sides of the propeller shaft. The air outlet end of the air pump is communicated with the air inlet end of the air flow conduit, the air outlet end of the air flow conduit is communicated with the air blowing port, and the control circuit is electrically connected with the two air pumps and the acceleration sensor respectively. The propeller provided by the present invention effectively weakens the strength of the propeller tip vortex by setting the blowing power coefficient of the blowing port when blowing air, so as to achieve the purpose of increasing the pulling force and improving the efficiency.
Owner:BEIHANG UNIV
Air injection structure of air layer resistance reduction device, ship air layer resistance reduction system and air layer resistance reduction ship
PendingCN112793709AStructural Strength EffectNot easy to corrodeWatercraft hull designHydrodynamic/hydrostatic featuresEngineeringMechanics
The invention discloses an air injection structure of an air layer resistance reduction device, a ship air layer resistance reduction system and an air layer resistance reduction ship. The air injection structure of the air layer resistance reduction device comprises a pressure stabilizing cavity and a plurality of spray holes formed in a ship bottom plate, a pressure stabilizing pipe is arranged above a longitudinal bone, an inner cavity of the pressure stabilizing pipe is the pressure stabilizing cavity, the pressure stabilizing pipe is provided with a plurality of air conveying pipes in one-to-one correspondence with the spray holes, and the two ends of each air conveying pipe communicate with the pressure stabilizing pipe and the corresponding spray hole correspondingly. In the prior art, the pressure stabilizing cavity is directly connected with the ship bottom plate, so that the pressure stabilizing cavity can penetrate through the longitudinal bone, and a longitudinal bone reinforcing plate needs to be additionally arranged on the longitudinal bone in order to compensate for the influence of opening holes in the longitudinal bone on the overall strength of the ship. According to the embodiment, the pressure stabilizing cavity is formed above the longitudinal bone, the longitudinal bone does not need to be cut or penetrate through, and the structural strength of the ship cannot be affected.
Owner:CSIC SHANGHAI MARINE ENERGY SAVING TECH DEV CO LTD
A spring-driven sealing mechanism for aircraft hardpoints
InactiveCN105109662BDoes not affect aerodynamic performanceSimple structureAircraft accessoriesAirplaneHardpoint
The invention discloses an aircraft hardpoint sealing mechanism driven by springs. The aircraft hardpoint sealing mechanism comprises a casing (1), wherein a positioning ring (11) vertically extends upwards from the upper top surface of the casing (1), two sealing plates (5) which can be mutually connected in an abutting manner, springs (6) for driving the sealing plates (5) to close and handles (8) through which the sealing plates (5) can be opened are arranged in the positioning ring (11), and a lower hole (10) corresponding to the sealing plates (5) is formed in the middle part of the casing (1); a cover plate (4) is fixed on the positioning ring (11), and an upper hole (12) corresponding to the lower hole (10) is formed in the cover plate (4). The aircraft hardpoint sealing mechanism disclosed by the invention is simple in structure andconvenient to use, after the aircraft hardpoint sealing mechanism is closed, the casing and the sealing plates are completely flush with the outer surface of an aircraft and not protruded out of the surface of the aircraft completely, and aerodynamic performances of the aircraft are not influenced.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Air film hole inlet and outlet groove structure for lap joint laminate contact surface
InactiveCN113236381AGuaranteed cooling effectAvoid misalignmentMachines/enginesEngine componentsPunchingConical forms
The invention discloses an air film hole inlet and outlet groove structure for a lap joint laminate contact surface. The air film hole inlet and outlet groove structure for the lap joint laminate contact surface is characterized in that an air film hole inlet and an air film hole outlet on the laminate contact surface with punched air film holes are subjected to hole diameter expansion treatment, that is, grooves are independently processed at the inlet and outlet positions, and then two laminates are overlapped and assembled. The grooves can be processed into a plurality of shapes, such as a conical shape, a cylindrical shape and a semispherical shape, and a proper groove shape can be selected according to specific conditions of a punching tool and the like. According to the air film hole inlet and outlet groove structure for the lap joint laminate contact surface, the corresponding air film holes in the lap joint laminates can effectively communicate, the problem that the corresponding air film holes of the two laminates are staggered due to processing errors is solved, and therefore the air film cooling effect on the lap joint laminates is guaranteed.
Owner:BEIHANG UNIV
Motor stator punching sheet machining method
ActiveCN113617920AAvoid skew instabilityAvoid damageMetal-working feeding devicesElectric machinesPunchingElectric machinery
The invention discloses a motor stator punching sheet machining method, and relates to the technical field of motors. The machining method comprises the following steps that raw materials are conveyed to a punching machine through a conveying mechanism after being unwound, and the raw materials are prevented from being inclined and unstable in the conveying process and are prevented from being damaged; the raw materials are conveyed into the punching machine, a punching assembly of the punching machine drives a punching sheet mold to punch the raw materials, and stator punching sheets are prepared; the surfaces of the stator punching sheets are polished, so that the quality of the stator punching sheets is improved; rust-proof treatment is carried out on the surfaces of the stator punching sheets; and the machined stator punching sheets are verified through punching sheet detection equipment, so that it is guaranteed that the products are qualified. The machining method has the advantages that the raw materials are stable in the conveying process and cannot be damaged, the surfaces of the punching sheets cannot be smudged, and the product breakage rate is low; the mold is convenient to maintain and low in maintenance cost; and the machined stator punching sheets are firm in structure, the lamination between the punching sheets is convenient, and the heat dissipation effect is good.
Owner:NANTONG HUDA MASCH EQUIP CO LTD
Pipeline laying structure applied to high-speed geotechnological centrifugal machine
PendingCN109261381ASimple installation and disassemblyGuarantee the safety of useCentrifugesStress concentrationEngineering
The invention discloses a pipeline laying structure applied to a high-speed geotechnological centrifugal machine. According to the structure, pipelines and cables are integrally cured and molded in the pipeline laying structure to reduce protruding matters on the outer surface of a rotary arm of the geotechnological centrifugal machine, so that the whole centrifugal machine has a better aerodynamic shape to help to reduce wind resistance, heat generated by friction and energy consumption; the rotary arm of the centrifugal machine is tightly sleeved with the pipeline laying structure, the direct pressing force of the pipelines, the cables and the rotary arm is replaced with a sleeve pressing force of the pipeline laying structure and the rotary arm, the pressing force is larger, the connection is more stable, and damage on the pipelines and the cables is not caused; the installation and dismantling of the pipeline laying structure is simple, a large number of screw holes do not need tobe reserved in the rotary arm of the geotechnological centrifugal machine, so that stress concentration on a local region on the rotary arm is not caused, and therefore the using safety of the rotaryarm can be effectively protected.
Owner:GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
Boom device and construction machinery
ActiveCN102704689BIncrease flexibilitySimple structureBuilding material handlingCouplingUniversal joint
The invention provides an arm support device for engineering machinery, comprising a first joint arm and a second joint arm, and a first joint shaft and a second joint shaft, the first joint shaft and the second joint shaft are cross-fixed and The axes of the two are perpendicular, the two ends of the first coupling shaft are respectively rotatably mounted on the first joint arm, and the two ends of the second coupling shaft are respectively rotatably mounted on the second joint arm; The first driving mechanism, the first driving mechanism can drive the first joint arm and the first coupling shaft to rotate relatively; the second joint arm is equipped with a second driving mechanism, and the second driving mechanism can drive the second joint arm and the second coupling shaft relative rotation. The invention also provides a construction machine. The technical solution provided by the invention adopts the imitation universal joint transmission mode, and has a simple structure. The boom can swing in the vertical direction and / or horizontal direction, and the flexibility of fabric distribution is greatly improved. When rotating in a small range, there is no need to start the turntable, which saves energy. consumption.
Owner:SANY AUTOMOBILE MFG CO LTD
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