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246results about How to "Reduce stiffness" patented technology
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Rock mass gas blasting method based on stress wave guidance
PendingCN119468825Areduce stiffnessreduce internal stressBlasting cartridgesBlastingClassical mechanicsMechanical engineering
The invention relates to a rock mass gas blasting method based on stress wave guidance. The method is suitable for the technical field of geotechnical engineering and mining. The technical problem to be solved by the invention is to provide the rock mass gas blasting method based on stress wave guidance. According to the technical scheme, the method comprises the steps that stress wave simulation is conducted on the basis of geological conditions of a target rock mass, and a stress wave simulation result of the rock mass is obtained; determining an arrangement mode and an excitation working mode of an ultrasonic excitation source and a low-frequency excitation source based on the type of the rock mass, the crack propagation target depth and the stress wave simulation result of the rock mass; wherein the low-frequency excitation source is used for reducing the rigidity of the surface of a rock mass through low-frequency excitation, increasing micro-deformation and initial micro-cracks of the rock mass, creating conditions for propagation of ultrasonic waves and locally guiding the formation position of the cracks; the ultrasonic excitation source is used for enabling ultrasonic waves to effectively reach the deep layer of the rock mass by utilizing the high penetrability of the ultrasonic waves to excite the expansion of microcracks.
Owner:POWERCHINA HUADONG ENG CORP LTD
Flexible electrode pulse ablation catheter, pulse ablation device and ablation equipment
PendingCN119606519AImprove ductilityreduce stiffnessInstrument handpiecesDiagnostic markersCatheterBiomedical engineering
The invention relates to the technical field of ablation, in particular to a flexible electrode pulse ablation catheter, a pulse ablation device and ablation equipment.The ablation catheter comprises a catheter body with a far end and a near end which are oppositely arranged, and the catheter body comprises a traction structure and a conveying pipe assembly arranged on the traction structure in a sleeving mode; the electrode assembly comprises at least one connecting pipe and at least two electrodes, every two adjacent electrodes are fixedly connected through the corresponding connecting pipe, and each electrode is of a tubular structure internally provided with a cavity; one end of the traction structure penetrates through the conveying pipe assembly, then extends into the electrode assembly and is fixedly connected with one end of an electrode arranged close to the far end of the pipe body. Under the action of external force, the traction structure can drive the two opposite ends of the same electrode to move oppositely or move away from the tubular structure until the tubular structure shrinks or expands. The flexible degree of the electrode assembly can be improved, the electrode with a larger area can be attached to the focus, conveying and ablation at the large-angle position of the periphery of the focus are achieved, the ablation effect is guaranteed, and the ablation success rate is increased.
Owner:MERRYSPRING MEDICAL TECH (ZHEJIANG) CO LTD
Gas turbine pull rod thread service life and anti-loosening optimization method based on reverse technology
PendingCN119442723Areduce stiffnessGood anti-loose effectGeometric CADSustainable transportationThermodynamicsScrew thread
The invention relates to the field of gas turbines, in particular to a gas turbine pull rod thread service life and anti-loosening optimization method based on a reverse technology, and the thread service life optimization method comprises the following steps: fitting a pull rod pre-tightening stretching amount by adopting normal distribution to obtain a cold-state stretching amount; measuring the main runner gas temperature under normal start-stop and quick start-stop working conditions, and calculating a convective heat transfer coefficient; a transient temperature field is calculated, and then a pull rod pre-tightening force transient change curve is solved; according to the stress and strain of the pull rod thread, respectively calculating the pull rod thread life and the pull rod thread total damage; an unloading groove is milled in the end face, making contact with a wheel disc, of the pull-rod nut, and the optimal solution of the unloading groove of the pull-rod nut is obtained through response face optimization. According to the anti-loosening optimization method, the response surface of the taper angle of the thread teeth of the pull rod thread is optimized on the basis. By solving the optimal solution of the unloading groove, the stress and strain of the tooth root part of the first thread are minimum, and the service life is prolonged; and the taper angle is added on the thread, so that the thread tooth load distribution is more uniform, and the anti-loosening effect is better.
Owner:ZHEJIANG RANCHUANG TURBINE MASCH CO LTD +1
Nonlinear bidirectional active anti-impact damper
ActiveCN119467586AGuaranteed smoothnessensure safetySpringsNon-rotating vibration suppressionData controlMagnetic damping
The invention belongs to the technical field of dampers, and particularly discloses a nonlinear bidirectional active anti-impact damper which comprises a cylinder body, a load connecting plate, an elastic supporting piece and a magnetic damping assembly, the load connecting plate is installed at one axial end of the cylinder body in a floating mode through the elastic supporting piece, the load connecting plate is connected with a piston rod, and the end of the piston rod extends into the cylinder body; the magnetic damping assembly comprises a magnet and a coil, one of the magnet and the coil is connected to the end of the piston rod, and the other one is connected into the cylinder body. The damper further comprises a displacement sensor and a controller, the displacement sensor is used for detecting displacement data of the load connecting plate, the controller is connected with the displacement sensor and the coil, and the controller is used for controlling the current of the coil so that the coil can cut magnetic lines of force of the magnet to generate magnetic damping force changing nonlinearly along with displacement. The damper can effectively restrain vibration impact, gentle impact resistance is achieved, and the influence of sudden impact force on the service performance of equipment is reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
Massage rehabilitation device for orthopedic nursing
ActiveCN119280022Aless discomfortReduce stiffnessRoller massageTherapeutic coolingPhysical medicine and rehabilitationOrthopedic department
The invention relates to the technical field of rehabilitation nursing, and provides an orthopedic nursing massage rehabilitation device which comprises a shell, an air inlet is formed in the top of the shell, a first fixing assembly is installed in the shell, and a supporting block is arranged on one side of the first fixing assembly and fixedly connected into the shell; a second fixing assembly is mounted on the other side of the first fixing assembly; a push block makes contact with a cylinder and can push the cylinder to move up and down, a telescopic rod at the bottom of an injured part is not started, an L-shaped plate at the position cannot push a clamping block on the push rod to be clamped with a clamping groove in a limiting block, and then the device can flexibly avoid injured fingers of a patient to massage other fingers; then the medical staff starts an electromagnetic sliding rail to drive a limiting block to slide left and right, the limiting block drives a push rod to move synchronously, and a push block on the push rod drives a cylinder to move up and down in the moving process, so that the fingers of the uninjured part of the patient are massaged, and the stiffness degree of the hand of the patient is reduced.
Owner:中国人民解放军总医院第八医学中心
Internal thread and threaded connection pair
PendingCN119308925Areduce stiffnessreduce stressNutsLoad modified fastenersStraight segmentScrew thread
The invention provides an internal thread and a threaded connection pair, and belongs to the technical field of threaded connection. The internal thread is a meter-made thread or an MJ thread, a thread profile line of the internal thread comprises a thread top, a straight line section, a thread bottom and a straight line section which are connected in sequence, the thread angle of the internal thread is 60 degrees, the thread pitch is P, the width of the thread top is defined as Cn, the width of the thread bottom is defined as Cn2, the thread height is defined as hn, Cn is larger than 0 and smaller than C0, # imgabs0 #, and C0 is the width of the thread top of the standard meter-made internal thread or the MJ internal thread. The tooth thickness of the internal thread teeth is reduced, the rigidity of the internal thread teeth can be reduced, the bending deflection of the internal thread teeth can be improved, and therefore when the thread connection pair bears alternating loads, the internal thread teeth can generate larger bending deformation to absorb inertia force generated by the alternating loads, and therefore the thread connection pair can bear the alternating loads. Therefore, the stress of the root of the external thread under the action of the alternating load is reduced, and the fatigue performance of the external thread is improved.
Owner:CSSC HAIWEI TECH CO LTD +1
Connector and pressure equipment
PendingCN119491965Aincrease the lengthreduce stiffnessNon-rotating vibration suppressionAdjustable jointsClassical mechanicsStructural engineering
The embodiment of the invention discloses a connector and pressure equipment, relates to the technical field of vibration isolation connection, and solves the problem of poor vibration isolation effect of a vacuum corrugated pipe. The connector comprises a first flange, a second flange, N corrugated pipes, N-1 connecting pieces and N-1 flexible supporting pieces. The first flange and the second flange are oppositely arranged. N > = 2. The N corrugated pipes are all located between the first flange and the second flange. The N corrugated pipes are sequentially arranged in a sleeved mode from inside to outside. The corrugated pipe located on the innermost layer is connected with the first flange. The corrugated pipe located on the outermost layer is connected with the second flange. Every two adjacent corrugated pipes are connected through the corresponding N-1 connecting pieces. The N-1 flexible supporting pieces are all arranged on the outer side of a cavity defined by the N corrugated pipes, the N-1 connecting pieces and the N-1 flexible supporting pieces. And the (N-1) flexible supporting pieces are respectively connected with the (N-1) connecting plates. And when N is equal to 2, the flexible supporting piece is connected with the first flange or the second flange. When N is larger than 2, N-1 flexible supporting pieces are connected with the first flange and the second flange respectively.
Owner:HUAWEI TECH CO LTD
Solenoid valve
PendingCN119467828Areduce frictional resistanceReduce orientationOperating means/releasing devices for valvesSpringsSolenoid valvePiston
The electromagnetic valve comprises a shell, a static iron core is arranged in the shell, a push rod shaft penetrates through a shaft hole of the static iron core, the front end of the push rod shaft is connected with a piston, the rear end of the push rod shaft is connected with a movable iron core, a reset spring is arranged on the push rod shaft in a sleeving mode and located between the static iron core and the movable iron core, a framework and a coil are arranged on the outer side of the movable iron core, and a sleeve is arranged on the inner side of the framework; the front end and the rear end of the shell are connected with the valve seat and the connector respectively, the glyd ring is arranged between the piston and the static iron core, and the guide ring is arranged between the push rod shaft and the static iron core. The Glyd ring and the guide ring are combined, so that sliding sealing performance, low friction resistance and guidance quality are achieved; a special-shaped sealing gasket is arranged on the piston, and high sealing performance is achieved through the brand-new sealing gasket design.
Owner:MANSO (SUZHOU) CONTROL SYST CO LTD
Bionic adhesion and sensing integrated structure facing rough surface and manufacturing method
PendingCN119643011Areduce stiffnessImprove adaptabilityForce measurementElectric/magnetic contours/curvatures measurementsCapacitive pressure sensorRough surface
The invention discloses a rough surface-oriented bionic adhesion / sensing integrated structure and a manufacturing method thereof. The rough surface-oriented bionic adhesion / sensing integrated structure comprises a bottom-layer bionic mushroom-shaped array structure and a top-layer inclined supporting micro-column array structure which are bonded through a flexible connecting layer, the top layer inclined supporting micro-column array structure and the bottom layer bionic mushroom-shaped array structure are attached to the upper layer flexible regionalization electrode and the lower layer flexible regionalization electrode respectively, and the top layer inclined supporting micro-column array structure, the upper layer flexible regionalization electrode and the lower layer flexible regionalization electrode form the flexible capacitive pressure sensor. The method comprises the following steps: firstly, manufacturing a top-layer inclined support micro-column array structure and a bottom-layer bionic mushroom-shaped array structure, then manufacturing flexible regionalized electrodes, and respectively attaching the flexible regionalized electrodes to the bottom-layer bionic mushroom-shaped array structure and the top-layer inclined support micro-column array structure; and finally, bonding the bottom bionic mushroom-shaped array structure and the top inclined supporting micro-column array structure through a flexible connecting layer. The method adapts to rough surfaces, realizes stable adhesion, monitors the contact state of the interface in real time and senses the morphology of the contact interface.
Owner:XI AN JIAOTONG UNIV +1
Buffering and damping structure for thrust bearing of aero-engine
The invention discloses an aero-engine thrust bearing buffering and damping structure which comprises a thrust bearing, a bearing ring cavity structure and a bearing buffering structure, a bearing outer ring is installed in a ring cavity of a fixed supporting frame, a bearing inner ring is installed on a fan rotating shaft, and a buffering body is arranged between the bearing outer ring and the ring cavity. And the bearing outer ring is provided with an instantaneous breaking boss which is radially positioned with the ring cavity. When fan blades of an aero-engine fly to lose a limit load similar to that of the aero-engine, an impact load is transmitted to the force bearing structure from the fan rotor through the bearing, the load is fused after exceeding the bearing limit of the boss, the outer ring of the bearing is allowed to move relative to the ring cavity in the radial direction, and the buffering and damping effects of a fan rotor system are achieved by extruding the buffering body. Meanwhile, due to the design of the damping structure, the critical rotating speed of the fan rotor is reduced, and the load on the bearing when the rotor passes through the critical rotating speed is further reduced. In the windmill state, the structure can effectively reduce the vibration level of the rotor, and stable operation of the bearing under the non-power condition is ensured.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
A sandwich structure automobile front anti-collision beam and assembly
The present invention discloses a novel sandwich structure automobile front anti-collision beam and assembly, the anti-collision beam comprises a tubular aluminum alloy shell, the shell is provided with aluminum foam, two-layer lattice structure and honeycomb structure inside, the honeycomb structure is filled between the two-layer lattice structure, the two-layer lattice structure comprises a first lattice structure arranged on a side away from the automobile, the first lattice structure comprises a plurality of interconnected first unit cells in the shape of a structure, and the aluminum foam is filled in the gap between the two-layer lattice structure and the inner wall of the shell. The present invention has the advantages of absorbing impact energy, reducing impact peak force and being conducive to achieving lightweight of automobiles.
Owner:HUAQIAO UNIVERSITY
Robot milling attitude optimization method based on main stiffness difference
ActiveCN119458406APrevent flutteringincrease stiffnessProgramme-controlled manipulatorSimulationStructural engineering
The invention discloses a robot milling posture optimization method based on a main stiffness difference value, and belongs to the field of robot milling. The method comprises the following steps: carrying out equidistant dispersion division on a milling track of a robot, and numbering each track point; calculating a tool nose point rigidity ellipsoid of the robot in a posture corresponding to the specific redundant angle at each processing track point; the point stiffness ellipsoid of the tool nose is projected to a milling plane, and the main stiffness difference PSD of the robot is obtained; and with the maximum sum of the main stiffness differences PSD corresponding to all the machining track points as an optimization target, traversing the optimal redundancy angles of all the track points under the constraints of physical interference, flexible space and joint speed, and solving the optimal robot milling posture. According to the invention, the whole milling process is carried out stably, and modal coupling flutter is avoided.
Owner:NORTHWESTERN POLYTECHNICAL UNIV +1
Split type generator
ActiveCN222620766Uincrease contact areaincrease positive pressureMagnetic circuit rotating partsMechanical energy handlingClassical mechanicsStructural engineering
The utility model discloses a split type generator, which comprises a rotor, a stator and an end cover, the rotor is fixed on a rotating shaft through a flange and an expansion sleeve, the flange comprises a flange edge, the rotor is at least divided into three sections, the stator and the end cover are respectively at least divided into two sections, the flange and the expansion sleeve are respectively at least divided into two sections, and the expansion sleeve is fixed on the rotating shaft. A gap is formed between the inner surface of the expansion sleeve and the rotating shaft, the outer surface of the expansion sleeve is in contact with the inner surface of the flange, conical surfaces matched with each other are arranged at the contact parts of the expansion sleeve and the flange, and the generator tightens the expansion sleeve by connecting the split flanges, so that the rotating shaft is clasped. The flanges and the expansion sleeve are combined through conical surface nesting matching contact, tightening operation is conducted on the expansion sleeve through the connecting and fastening effect between the split flanges, and the purpose that the expansion sleeve tightly holds the rotating shaft is achieved. The contact area and the contact surface pressure of the expansion sleeve and the flange are large, the positive pressure of friction force generated on the contact surface is large, and the expansion sleeve and the rotating shaft can be clamped more tightly.
Owner:HUNAN CRRC SHANGQU ELECTRIC CO LTD
Fiber yarn containing basalt material as well as preparation method and application of fiber yarn
PendingCN119465466AIncrease the amount addedovercome rigidityFilament/thread formingYarnPolyesterYarn
The invention provides a fiber yarn containing a basalt material. The fiber yarn comprises a core layer and a skin layer wrapping the core layer. The core layer comprises 77-84 parts by weight of polyester, 15-20 parts by weight of basalt fiber powder and 1-3 parts by weight of a coupling agent; and the skin layer comprises polyester. Compared with the prior art, the basalt fiber is added into the polyester fiber in the form of a powder material, the characteristic of low heat conductivity of the basalt fiber can be exerted, and the heat preservation function of the polyester fiber is improved; meanwhile, the limitation that basalt inorganic fibers are high in rigidity and cannot be applied to the field of civil textile and clothing is overcome; and the basalt fiber powder is added into the core layer part of the polyester fiber, so that the addition amount of the powder can be increased to the maximum extent, and the influence of the material color and the fiber rigidity of the polyester fiber is reduced.
Owner:ANTA (CHINA) CO LTD
Combined nut for double-end bolt and double-end bolt assembly
PendingCN119321441Areduce stiffnessEasy to disassembleNutsLoad modified fastenersBolt connectionInertia force
The invention provides a combined nut for a double-end bolt and a double-end bolt assembly, and belongs to the technical field of bolt connection. The combined nut comprises a protection nut embedded in the structure body and a breakage nut connected with the end, stretching out of the structure body, of the stud, the crest width of an internal thread of the protection nut is Cnb, the root width of the internal thread of the protection nut is Cnb2, the height of the internal thread of the breakage nut is hnb, the crest width of an internal thread of the breakage nut is Cnd, the root width of the internal thread of the breakage nut is Cnd2, the height of the internal thread of the breakage nut is hnd, and Cnb is larger than 0 and smaller than Cnd. The rigidity of the internal thread teeth of the protection nut is smaller than that of the internal thread teeth of the broken nut, the bending deflection of the internal thread teeth of the protection nut is larger, and when the stud assembly bears an alternating load, the internal thread teeth of the protection nut can generate larger bending deformation to absorb inertia force generated by the alternating load, so that the stability of the stud assembly is improved. And the fatigue performance of the external thread of the stud at the protective nut is improved, so that the probability that the fracture position occurs at the fracture nut is higher.
Owner:CSSC HAIWEI TECH CO LTD +1
Internal thread and threaded connection pair
PendingCN119222239Areduce stiffnessreduce stressNutsLoad modified fastenersMaximum depthScrew thread
The invention provides an internal thread and a threaded connection pair, and belongs to the technical field of threaded connection. The internal thread is a meter thread or an MJ thread, a thread profile of the internal thread comprises a thread top, a straight line section, a thread bottom and a straight line section which are connected in sequence, the thread angle of the internal thread is 60 degrees, the thread pitch is P, the thread height is hn, a groove is formed in the thread bottom of the internal thread, the groove width of the groove is defined as g, the maximum depth of the groove is hd, and then # imgabs0 is obtained. The bending deflection of the internal thread tooth is improved, at the moment, the internal thread is equivalent to a spring with reduced rigidity, and therefore when the thread connection pair bears alternating loads, the internal thread tooth can generate larger bending deformation to absorb inertia force generated by the alternating loads, and therefore the stress of the tooth bottom of the external thread under the action of the alternating loads is reduced; and the fatigue performance of the external threads is improved.
Owner:CSSC HAIWEI TECH CO LTD +1
Milling wireless vibration measurement cutter handle manufacturing system based on FPC flexible packaging
ActiveCN119387668AStructural damage is smallreduce stiffnessMeasurement/indication equipmentsMilling equipment detailsManufacturing systemsIndustrial engineering
A milling wireless vibration measurement cutter handle manufacturing system based on FPC flexible packaging comprises a milling machine, a wireless intelligent cutter handle arranged on the milling machine, a cutter located at the tail end of the wireless intelligent cutter handle and a workpiece arranged opposite to the cutter, the wireless intelligent cutter handle is connected with an upper computer in a wireless mode and transmits three-way vibration signals of the cutter handle position in the cutting process, the three-way vibration signals are processed and analyzed through the upper computer through an artificial intelligence algorithm, the cutter abrasion value is monitored in real time, the remaining life of a cutter is predicted, and cutting parameters are optimized. And more reasonable cutting parameters are provided for cutting machining of the workpiece, and the service life of the cutter is prolonged. The reduction of strength and rigidity caused by the damage of the original cutter handle structure is made up through the composite material, and the feasibility in a high-speed and high-precision cutting processing task is ensured; meanwhile, the signal acquisition module and the charging module are flexibly distributed on the outer cylindrical surface of the knife handle based on the FPC, the overall size of the intelligent knife handle is minimized, and the applicability in the complex path working condition is guaranteed.
Owner:SHANGHAI JIAOTONG UNIV
Large-curvature fairing type composite material part forming device and forming method
The invention belongs to the technical field of aviation composite material forming machining, and discloses a large-curvature fairing type composite material workpiece forming device and method.The device comprises an upper core mold forming mold, a lower core mold forming mold, a lower core mold forming mold, a lower core mold forming mold and an upper core mold forming mold, and the molded surface of the upper core mold forming mold is designed and manufactured based on the outer molded surface of a product; the molded surface of the product forming die is designed and manufactured based on the inner molded surface of the product, and the upper core die and the product forming die are matched for use to form the product. The technical problems of surface wrinkling, fiber buckling, sinking and the like of the aerodynamic shape surface of the composite material part of the large-curvature fairing are solved. And the surface quality of the product is ensured, and the defects of wrinkles, fiber buckling, sinking and the like are reduced and eliminated.
Owner:AVIC XIAN AIRCRAFT IND GRP CO LTD
Composite pile foundation structure for road surface rigidity optimization of road transition section and design and use method of composite pile foundation structure
InactiveCN119507454Areduce stiffnessincrease spacingGeometric CADRoadwaysPile capArchitectural engineering
The invention provides a composite pile foundation structure for road surface rigidity optimization of a road transition section and a design and use method of the composite pile foundation structure, and relates to the technical field of composite pile foundations. The composite pile foundation structure can be applied to an embankment foundation and a bridge abutment pile foundation and comprises a bearing platform, a pile cap, a gasket, an elastic composite plate, replaceable filler, a pile and a pile end self-adaptive deformer. The design and use method of the bridge abutment pile foundation is guided by the load settlement characteristic of the butted roadbed, and the design and use method of the embankment composite pile foundation is guided by the settlement control standard. Design variables comprise the pile length, the pile diameter, the pile number, the compression thickness of the elastic composite plate, the arrangement depth of the replaceable filler, the limit pile side friction resistance of the replaceable filler and the compression modulus of the replaceable material, the structure can optimize the overall rigidity of the road surface on one side of the abutment, the phenomenon of bump of the abutment is effectively avoided, zero-differential settlement is achieved theoretically, and the construction efficiency is improved. And the settlement index can be controlled in the application of an embankment foundation.
Owner:SOUTHWEST JIAOTONG UNIV
Framed vehicle door, vehicle and machining method of framed vehicle door
PendingCN119283592Areduce stiffnessEasy to assembleEngine sealsVehicle sealing arrangementsAgricultural engineeringCar door
The invention discloses a framed vehicle door, a vehicle and a machining method of the framed vehicle door, and relates to the technical field of vehicles, the framed vehicle door comprises an inner plate sub-assembly, an outer plate sub-assembly, a water cutting mounting plate and an outer water cutting assembly, the inner plate sub-assembly comprises a main body part and a window frame part, and the window frame part is located above the main body part; the outer plate sub-assembly is arranged corresponding to the main body part, and the outer plate sub-assembly is connected with the main body part; the water cutting mounting plate is fixedly arranged on the inner plate sub-assembly and is positioned between the outer plate sub-assembly and the inner plate sub-assembly; the outer water cutting assembly is fixedly arranged at the upper end of the water cutting mounting plate, the upper end of the outer water cutting assembly is not higher than the upper end of the outer plate sub-assembly, and the side, away from the outer plate sub-assembly, of the outer water cutting assembly is used for abutting against vehicle window glass. According to the technical scheme provided by the invention, the hidden assembly of the outer water cutting assembly can be realized, the outer water cutting assembly is ensured to be hidden and invisible on the outer side of the framed vehicle door, and the overall aesthetic feeling of the framed vehicle door is improved.
Owner:ZHEJIANG GEELY HLDG GRP CO LTD +1
Separating type generator elastic supporting spring and setting method
ActiveCN119267476Arich varietyeasy to produceMultiple spring combinationsRubber-like material springsWind powerElectric generator
The invention belongs to the technical field of wind power vibration reduction, and particularly relates to a separating type generator elastic supporting spring and a setting method. The separating type generator elastic supporting spring comprises at least two conical spring assemblies which are coaxially arranged in a sleeved mode, each conical spring assembly comprises a rubber layer, and the inner side and the outer side of each rubber layer are provided with an inner conical face and an outer conical face respectively; the inner partition plate is arranged on the inner conical surface of the adhesive layer; the outer partition plate is arranged on the outer conical surface of the rubber layer, and the conical spring assemblies with different numbers and different physical characteristics have new physical characteristics after being coaxially arranged in a sleeved mode.
Owner:ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY CO LTD
Anti-collision cross beam assembly of vehicle forecabin, vehicle body assembly of vehicle and vehicle
The invention provides an anti-collision cross beam assembly of a vehicle forecabin, a vehicle body assembly of a vehicle and the vehicle. The anti-collision cross beam assembly of the vehicle forecabin comprises a first anti-collision cross beam, a first energy absorption box, a second anti-collision cross beam and a second energy absorption box. The first anti-collision cross beam is located above the second anti-collision cross beam in the height direction of the vehicle, the first anti-collision cross beam is located on the front side of a vehicle body longitudinal beam of the vehicle in the length direction of the vehicle, and the first energy absorption box is used for being connected between the first anti-collision cross beam and the vehicle body longitudinal beam; the second anti-collision beam and the second energy absorption box are both located on the front side of an auxiliary frame assembly of the vehicle in the length direction of the vehicle, the second anti-collision beam and the second energy absorption box are arranged in a staggered mode in the height direction of the vehicle, and the second anti-collision beam is connected with one end of the second energy absorption box through an anti-collision supporting piece. And the other end of the second energy absorption box is used for being connected with an auxiliary frame assembly, so that the collision force absorption effect of the anti-collision beam assembly is improved.
Owner:ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD +1
Hydrogen sensor based on silicon nano film
ActiveCN119269587Ahigh sensitivityincrease the lengthMaterial resistanceCantilevered beamHydrogen sensor
The invention discloses a hydrogen sensor based on a silicon nano-film. The hydrogen sensor comprises a hydrogen sensitive material, a central mass block, a silicon nano-film piezoresistor, cantilever beams, a metal lead and a frame, the hydrogen-sensitive material is deposited on the central mass block, the central mass block is located in the middle of the four cantilever beams, the central mass block and the four cantilever beams form a cantilever beam structure shaped like a Chinese character'wan ', each beam arm of the four cantilever beams is provided with a silicon nano-film piezoresistor, each cantilever beam is further provided with a metal lead, and the metal lead is connected with the central mass block. The metal lead is connected with the piezoresistor to form a Wheatstone bridge, and the frame supports the periphery of the cantilever beam structure shaped like the Chinese character'wan '. According to the hydrogen sensor based on the silicon nano-film, a nano-porous palladium film is adopted as a hydrogen sensitive material, a silicon nano-film piezoresistor is adopted as a piezoresistor, local narrow thinning is performed on a cantilever beam, and the sensitivity and the response speed of the sensor are improved by utilizing the hydrogen sensitive material-a cantilever beam structure shaped like a Chinese character'wan 'and a silicon nano-film sensitive unit.
Owner:JIMEI UNIV
Spliced car body and rail vehicle
ActiveCN111152805Bhigh strengthincrease stiffnessRailway roofsRailway transportLap jointTorsional load
The present invention discloses a spliced car body and a rail vehicle, wherein the roof, chassis, side roof and side wall of the spliced car body are respectively formed by splicing double-layer pultruded profiles, and the double-layer pultruded profiles include an outer plate, an inner plate and a cavity separated by ribs in the interlayer of the outer plate and the inner plate; the upper edge and the lower edge of the side roof are respectively connected to the edge of the roof and the upper edge of the side wall through a lap joint, and the lower edge of the side wall is connected to the edge of the chassis through a side wall connector; the side wall connector is a single double-layer pultruded profile, the upper edge of which is connected to the lower edge of the side wall through a plug joint, and the lower edge of which is connected to the edge of the chassis through a push joint. Under the same strength conditions, the car body structure has the characteristics of high rigidity, light weight, high production efficiency, etc., and can meet the complex working load requirements such as the air tightness load and torsional load of the rail vehicle body.
Owner:CRRC QINGDAO SIFANG CO LTD
Microcapsule antibacterial material and preparation method thereof
InactiveCN119385154AImprove adsorption capacityImprove antibacterial propertiesBiocideFungicidesFreeze-dryingSilicon dioxide
The invention discloses a microcapsule antibacterial material and a preparation method thereof, and relates to the technical field of antibacterial materials. The preparation method comprises the following steps: dissolving quaternary ammonium chitosan in deionized water, dispersing nano iron oxide in the solution, carrying out ultrasonic treatment, adding lavender essential oil hybrid modified montmorillonite into the mixture, and stirring to prepare a mixed solution; dissolving sodium tripolyphosphate in deionized water, slowly dropwise adding the mixture until the mixture is stirred, and placing the mixture in a high-magnetic-field constant-humidity constant-temperature box to prepare an initial emulsion; mixing colloidal silicon dioxide with distilled water to prepare a SiO2 solution, adding the SiO2 solution into the initial emulsion, stirring, adding the quaternary ammonium chitosan solution, stirring, filtering, washing, drying to obtain a crude product material, and freeze-drying the crude product material in a freeze-drying machine to obtain the microcapsule antibacterial material.
Owner:SHANGHAI YEHEZHOU TECHNOLOGY CO LTD
Non-combustible spraying polyurethane material for refrigeration house and preparation method of non-combustible spraying polyurethane material
PendingCN119192530AImprove flame retardant performanceImprove flame retardant propertiesPolyesterPolymer science
The invention relates to a non-combustible spraying polyurethane material for a refrigeration house and a preparation method thereof, the non-combustible spraying polyurethane material for the refrigeration house is composed of a component A and a component B. The volume ratio of the component A to the component B is 1: 0.9-1.7, the component A is prepared from the following components in parts by weight: 15 to 70 parts of polyether polyol composition, 15 to 70 parts of flame-retardant polyether polyol, 15 to 70 parts of flame-retardant polyester polyol, 20 to 45 parts of flame retardant, 0.5 to 3 parts of foam stabilizer, 0.2 to 2 parts of chemical foaming agent, 10 to 30 parts of physical foaming agent and 6 to 16 parts of catalyst; and the component B is prepared from 123 to 333 parts of polymethylene polyphenyl polyisocyanate. The non-combustible polyurethane foam formed by effectively matching the components such as the polyether polyol II, the polyether polyol III, the polyester polyol, the catalyst and the foaming agent and mixing and spraying with the polymethylene polyphenyl polyisocyanic acid has the characteristic of high flame retardance.
Owner:YANTAI WANSHUN NEW MATERIALS CO LTD
Split type optical satellite platform for multiple application modes
ActiveCN119568438Areduce couplingcompact structureArtificial satellitesHigh level techniquesSpaceflightMechanical engineering
According to the split type optical satellite platform oriented to the multiple application modes, physical isolation of the load cabin and the service cabin is achieved through the innovative composite Lorentz force executing mechanism, and interference of vibration of the service cabin on the load cabin is effectively isolated. The composite Lorentz force actuating mechanism not only solves the nonlinear problem and the collision avoidance problem of a traditional actuating mechanism during rotation and large-angle maneuvering, but also has the advantages of being compact in structure, low in control rate, high in response speed, high in output force precision and the like. The platform supports multiple modes such as earth three-axis high-stability imaging, rotary optical imaging and large-angle maneuvering, and the on-orbit application efficiency of an optical satellite is remarkably improved. According to the invention, a new progress of the spaceflight technology in the aspects of high precision and high agility control is displayed, and powerful support is provided for future space tasks.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Conductive terminal
PendingCN119481762Areduce gapIncrease diversion areaSecuring/insulating coupling contact membersCoupling contact membersStructural engineeringMechanical engineering
Owner:AMPHENOL PCD SHENZHEN
BONE CONDUCTION DEVICE
ActiveDE602018082206T2reduce stiffnessefficiency of conducting a low frequency sound/vibration may be highHeadphones for stereophonic communicationNon-optical adjuncts
A bone conductive sound generating device is provided and includes a sound generating mechanism and a fixing mechanism. The fixing mechanism is configured to act on the sound generating mechanism, such that the sound generating mechanism adheres to and fit with a back of an auricle of a user at least when the sound generating mechanism is in use. Accordingly, the present application may improve the sound quality of the bone conductive sound generating device, improving listening experience for the user.
Owner:SHENZHEN SHOKZ CO LTD
Shape memory composite material and preparation method thereof
ActiveCN119239067Areduce stiffnessImprove deformation abilitySynthetic resin layered productsLaminationGlass fiberFiber
The invention provides a shape memory composite material and a preparation method thereof, and belongs to the technical field of composite materials. Comprising an upper composite layer, a middle layer and a lower composite layer which are sequentially stacked, the upper composite layer is connected with the middle layer through a polyurethane film layer, the middle layer is connected with the lower composite layer through a polyurethane film layer, and the upper composite layer comprises an upper carbon fiber fabric layer and a plurality of polyurethane film layers stacked on the carbon fiber fabric layer. The middle layer comprises a plurality of stacked glass fiber fabric layers, the glass fiber fabric layers are connected through polyurethane film layers, and the lower composite layer comprises a plurality of stacked polyurethane film layers and lower carbon fiber fabric layers stacked on the polyurethane film layers. The shape memory composite material prepared by the invention not only has good mechanical strength, but also has better deformability and shape memory function.
Owner:GUANGDONG HANGYU COMPOSITE MATERIAL TECH CO LTD