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126results about How to "Improve anti-overload performance" patented technology
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High-rigidity nine-lever and two-freedom degree controllable mechanical loading mechanism
InactiveCN103711157AImprove mechanical propertiesSuitable designMechanical machines/dredgersKinematicsEngineering
The invention relates to a high-rigidity nine-lever and two-freedom degree controllable mechanical loading mechanism, which comprises a machine frame, a movable arm control branched chain and a bucket control branched chain, wherein the movable arm control branched chain is controlled by a first driving lever and is used for elevating a movable arm; the bucket control branched chain is controlled by a second driving lever and is used for turning a bucket. The mechanical loading mechanism can complete loading and unloading operation by means of the interaction of the movable arm elevating branched chain and the bucket control branched chain. According to the mechanical loading mechanism, all the levers are connected through revolute pairs, and thereby the defects of high cost, low reliability, high maintenance cost and the like of the conventional full hydraulic loading mechanism with sliding pairs are overcome. Moreover, compared with other controllable loading mechanisms, the mechanical loading mechanism has the advantages of compact structure, high rigidity, and novel structure with superior kinematic and dynamic performance, and thereby the loading mechanism is higher in reliability and dynamic stability.
Owner:GUANGXI UNIV
Steel slag asphalt graded crushed rock mixture
InactiveCN102584111AImprove carrying capacityIncreased durabilitySolid waste managementSlagGranularity
The invention discloses steel slag asphalt graded crushed rock mixture. The steel slag asphalt graded crushed rock mixture comprises the following components in percentage by weight: 90-93 percent of aggregate particle, 4-6 percent of asphalt and 3-4 percent of limestone mineral powder, wherein the aggregate comprises the following four grain compositions in percentage by weight: 21-24 percent of grain composition 1, 20-28 percent of grain composition 2, 19-25 percent of grain composition 3 and 32-37 percent of grain composition 4; the granularity of the grain composition 1 is smaller than or equal to 31.5mm and larger than 19mm, the granularity of the grain composition 2 is smaller than or equal to 19mm and larger than 9.5mm, the granularity of the grain composition 3 is smaller than or equal to 9.5mm and larger than 4.75mm, and the granularity of the grain composition 4 is smaller than or equal to 4.75mm and larger than 0mm; and the aggregate is steel slag or the mixture of the steel slag and limestone. Proved by experiments, the mixture has the advantages of low cost, reasonable granularity grain size distribution, water proof performance and good stability.
Owner:武钢集团有限公司
Monolithic silicon based SOI high-temperature low-drift pressure sensor
InactiveCN1731115AThere will be no leakageCorrectly designedFluid pressure measurement using piezo-electric devicesSolid-state devicesElectrical resistance and conductanceSingle chip
The invention relates to a single chip silicon SOI high temperature low drift pressure sensor in the field of sensitive sensing technology. Wherein the four voltage-sensitive resistances which form the Wheatstone bridge adopt SOI material; it adopts the interval compensation and the outer compensation technology of partial interval resistance of the SOI resistance network to make the zero point temperature drift below 1X10-6Vs / íµ; it adopts girder-film-island structure to improve the sensibility and linearity of the sensor; it adopts polysilicon with thick boron and the aluminum lead wire covered the lead wire surface to form the interval lead wire of the sensor; it adopts thick boron automatically end technology to make high sensibility high temperature low drift pressure sensor.
Owner:SHANGHAI SAISU SENSOR TECH
Low cost, small volum plate micro-inertial measuring system based on MEMS
InactiveCN1912545AReduce volumeReduce power consumptionNavigation by speed/acceleration measurementsMoving averageGyroscope
A micro inertia measurement system of small volume plate type based on MEMS is prepared as forming plate structure by planar plate, positioning pin and boss; erecting three gyroscopes on planar plate through positioning pin to ensure orthogonality of three sensitive shaft, using three acceleration meters to carry out accurate positioning to ensure orthogonality of sensitive shaft through signal plate and using boss to calibrate positioning of test.
Owner:BEIHANG UNIV
Working platform inclination angle measurement method and apparatus thereof
ActiveCN103134474AThe right sizeExpand the measurement rangeIncline measurementVertical planeAngular rate sensor
The invention relates to a working platform inclination angle measurement method and an apparatus thereof. The method comprises the following steps: acquiring the inclination angle beta between a working platform and a vertical plane in the rotation state through an inclination angle sensor arranged on the workbench, and acquiring the rotation angle rate omega of the working platform in the rotation state through an angular rate sensor arranged on the working platform; measuring the rotation radius R of the working platform through a radium measurement instrument; and calculating through utilizing a formula alpha=arcos(x-y) to obtain the practical inclination angle alpha of the working platform, wherein x=cosbeta, y=omega<2>R / g, and g is the gravitational acceleration. The practical inclination angle alpha obtained through calculating is treated as the measured inclination angle of the working platform. The method and the apparatus allow the inclination angle of the working platform to be accurately measured during the rotation of the working platform, so a problem that the measured inclination angle is less than the practical inclination angle value because of the omitting of the influence of the centripetal force during the rotation of the working platform in the prior art is solved.
Owner:XCMG CONSTR MACHINERY
Metamorphic mechanism type mechanical loading mechanism
InactiveCN104047317AVersatile stage changeToto topology changesMechanical machines/dredgersEngineeringMultiple function
Owner:GUANGXI UNIV
Large-rigidity multi-connecting-rod controllable mechanical loading mechanism
InactiveCN103726524AImprove mechanical propertiesSuitable designMechanical machines/dredgersEngineeringMechanical engineering
A large-rigidity multi-connecting-rod controllable mechanical loading mechanism comprises a frame, a movable arm control branch chain and a bucket control branch chain. The movable arm control branch chain is controlled by a first drive rod to perform movable arm ascending or descending. The bucket control branch chain is controlled by a second drive rod to control turning of a bucket. By cooperation of the movable arm control branch chain and the bucket control branch chain, loading operation can be completed. Rods of the mechanical loading mechanism are connected through rotating pairs, and the defects that traditional total-hydraulic loading mechanisms containing moving pairs are high in manufacturing cost, poor in reliability, high in maintenance cost and the like are overcome. Compared with other controllable mechanical loading mechanisms, the loading mechanism is compact in structure, high in rigidity, and good in reliability and dynamic stability by using the novel structure with excellent kinematic and dynamic performance.
Owner:GUANGXI UNIV
Target type flowmeter of non-contact type displacement sensor
InactiveCN101603846AAvoid damageSo as not to damageVolume/mass flow by dynamic fluid flow effectDisplay deviceContact type
The invention relates to a target type flowmeter of a non-contact type displacement sensor. An elastic element (4) is arranged in a casing (3), a target bar (2) is arranged in the elastic element (4), the lower end is provided with a target piece (1), the upper part of the target bar (2) is provided with a mechanical damping device (5), the top end of the target bar (2) is provided with detection displacement magnetic steel (6), a position corresponding to the detection displacement magnetic steel (6) is provided with a Hall linear displacement sensor (7), and a signal output end of the Hall linear displacement sensor (7) is connected with a microprocessor (8) and a display (9). The Hall linear displacement sensor does not directly contact with the target bar, the influence of the target bar vibration on the sensor is reduced by the mechanical damping device, the Hall linear displacement sensor can not be damaged even if the elastic element end generates plastic deformation, the sensor is far away from a measuring medium, and a high-temperature type flowmeter can be manufactured. The service life of the sensor is prolonged, the measurement accuracy is enhanced, and the product of the target type flowmeter is truly reliable and durable and has low maintenance quantity.
Owner:DANDONG NAI NENG INSTR & ELECTRIC
Working roll for rolling medium-thickness plate with high grade and high strength and manufacture method thereof
ActiveCN101954378AImproved roll shape retentionImprove wear resistanceRollsMetal rolling arrangementsChemical compositionHardness
The invention discloses a working roll for rolling a medium-thickness plate with high grade and high strength and a manufacture method thereof. The working roll is applied to a medium-thickness plate rolling mill of a rolling steel industry. A working layer comprises the following alloy components in percentage by weight: 3.00-3.50 percent of C, 0.40-1.20 percent of Si, 0.50-1.20 percent of Mn, not more than 0.10 percent of P, not more than 0.05 percent of S, 1.30-2.50 percent of Cr, 3.20-4.50 percent of Ni, 0.20-1.00 percent of Mo, 0.20-2.00 percent of W and 1.00-1.50 percent of V. A roll core comprises the following chemical components in percentage by weight: 2.80-3.50 percent of C, 2.00-2.50 percent of Si, 0.50-1.00 percent of Mn, not more than 0.10 percent of P, not more than 0.05 percent of S, 0.20-0.50 percent of Cr, 0.20-0.60 percent of Ni, not more than 0.20 percent of Mo and not more than 0.30 percent of Re. The working roll manufactured by adopting a centrifugal composite casting process and two-section tempering production at 400-550 DEG C for 25-30 hours is the working roll for rolling the medium-thickness plate with high grade and high strength, which has the advantages of high abrasion resistance and less hardness reduction.
Owner:SINOSTEEL XINGTAI MACHINERY & MILL ROLL
High-dynamic attitude measurement method of guided projectiles
InactiveCN107883940AImprove anti-overload performancePrecise guidanceAmmunition testingNavigation by speed/acceleration measurementsResistive sensorsEngineering
The invention discloses a high-dynamic attitude measurement method of guided projectiles. The method can effectively and accurately measure the attitude information of high-overload and high-rotationguided projectiles. In the invention, an IMU, which is composed of three high-overload angular angle gyros, and a three-axis magneto-resistive sensor are mounted on a projectile; when the projectile is ejected from a muzzle, firstly, average value of output signal frequencies of the three-axis magneto-resistive sensor is employed as the roll angle rate of the present projectile; and when the rollangle rate, measured by the magneto-resistive sensor, of the projectile is less than or equal to 10 r / s, on the basis of the roll angle rate, measured by the IMU, of the projectile, the roll angle rate, which is acquired by the magneto-resistive sensor, is calibrated by the roll angle rate, acquired by the magneto-resistive sensor; and then the calibrated roll angle rate is employed as the roll angle rate of the present projectile; and then by means of the roll angle rate of the present projectile, pitch angle rate, measured by the IMU, of the projectile, and yaw angle of the projectile, the attitude of the present projectile is obtained with combination of strapdown inertial navigation attitude algorithm.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +1
Stator for electric car hub motor and motor containing the same
ActiveCN106208437AExtended service lifeAvoid destructionMagnetic circuit rotating partsElectric machinesInsulation layerElectric cars
The invention relates to a stator for an electric car hub motor and a motor containing the same. The stator for the electric car hub motor comprises a stator core and a bracket; the stator core is fixed on the bracket, the outer diameter of the stator core is 205.01-212mm, the notch width of the stator core groove, the stator core outer diameter, the stator core inner diameter, the yoke thickness of the stator core, and the stator core groove number meet the following relations: the notch width of the stator core groove=(alpha+ the value of the single-layer silicon steel sheet thickness of the stator core)*Pai*(stator core outer diameter-stator core inner diameter-yoke thickness of the stator core) / stator core groove number, wherein the value range of alpha is 0.3-0.9. The stator disclosed by the invention has the beneficial effects: the stator structure of the invention reasonably optimizes the electric power and magnetic power in the motor magnetic circuit design, the quick heating condition of the motor caused by short-term overload is avoided, the problems that a winding insulation layer is damaged and the Hall position sensor is invalid are prevented, and the service life of the motor is increased.
Owner:WENLING JIUZHOU ELECTROMECHANICAL
Nine-bar two-degree-of-freedom mechanical loading mechanism
InactiveCN103726523AImprove mechanical propertiesSuitable designMechanical machines/dredgersKinematicsEngineering
A nine-bar two-degree-of-freedom mechanical loading mechanism is composed of a frame, a movable-arm controlled branched chain and a bucket controlled branched chain. The movable-arm controlled branched chain is controlled through a first driving bar and performs movable-arm ascending and descending operations, the bucket controlled branched chain is controlled through a second driving bar to complete overturn operation of a bucket, and the movable-arm controlled branched chain and the bucket controlled branched chain cooperate with each other to complete loading and unloading operations of the mechanical loading mechanism. Member bars of the mechanical loading mechanism are all connected through revolute pairs, so that the shortcomings that a traditional full-hydraulic loading mechanism using sliding pairs is high in price, poor in reliability, high in maintenance cost and the like are overcome; compared to other mechanical-controllable loading mechanisms, the nine-bar two-degree-of-freedom mechanical loading mechanism which is compact in structure and high in rigidity is a brand new mechanism more superior in performance by adopting principles of kinematics and dynamics, and thereby being better in reliability and dynamic stability.
Owner:GUANGXI UNIV
Biaxially-resonant silicon-micromachined accelerometer structure in shape of Chinese character 'tian'
InactiveCN102539832AIncrease in sizeGood anti-noiseAcceleration measurement using interia forcesSolid-state devicesAccelerometerClosed loop
The invention discloses a biaxially resonant silicon-micromachined accelerometer in the shape of a Chinese character 'tian' and aims at designing and manufacturing a high-sensitivity and high-resolution biaxially-resonant silicon-micromachined accelerometer. The structure is characterized in that (1) because a mass block structure in the shape of a Chinese character 'tian' is adopted, the volume of a mass block is maximized, and the acceleration can be converted into an inertial force more effectively; and the whole structure is symmetrically distributed, which is favorable for resisting noises and inhibiting temperature drift; (2) a support beam (in the shape of a Chinese character 'ji') arranged at the periphery of the structure facilitates the release of the residual stress and temperature stress of the structure, thereby reducing the support stiffness of the structure in a sensitive direction; (3) due to the application of a spring-like beam (in the shape of a Chinese character 'kou') at one end of a resonator, the influence of external shocks on the beam is reduced, and the spring-like beam plays a role in releasing the residual stress of the structure; and (4) an arc structure at the root part of a tuning fork in the resonator can be used for effectively reducing the energy coupling and improving the mechanical quality factor of the resonator, and is easy for realizationof closed-loop control.
Owner:BEIHANG UNIV
Cable connector for directly connecting cables by way of piercing cable insulation
InactiveCN101872906AStrong enoughImprove anti-overload performanceContact members penetrating/cutting insulation/cable strandsClamped/spring connectionsElectrical conductorElectrical connection
The invention discloses a cable connector for directly connecting cables by way of piercing cable insulation, which has an integral aluminum alloy structure produced by casting and comprises a connector main body. The connector main body comprises a main connector, the main connector is provided with a clamped intrados contacted with a cable, and conical clamping piercers which are arranged axially and intensively in a certain radial radian and simultaneously cast with the main connector are arranged on the clamped intrados; the middle part of the clamped intrados of the main connector is provided with limit sheets which are simultaneously cast with the main connector, the main connector is provided with a screw hole and connected with a clamping body by a connecting bolt; the clamping body is provided with a clamped intrados contacted with the cable, and conical clamping piercers which are arranged axially and intensively in a certain radial radian and simultaneously cast with the clamping body are arranged on the clamped intrados. The cable connector of the invention has the advantage that: the electrical connection of the electrical connection part which cannot bear the cable tension is rapidly and effectively completed by piercing the insulation to directly reach a conductor with the conical clamping piercers under the condition that the end insulation of the cable is not stripped.
Owner:王刚
Electro-hydraulic integrated driver for rotary pin of container hanging tool
InactiveCN102887432ACompact structureReduce volumeFluid-pressure actuator componentsLoad-engaging elementsElectro hydraulicEngineering
The invention discloses an electro-hydraulic integrated driver for a rotary pin of a container hanging tool. The electro-hydraulic integrated driver comprises a bi-directional motor, a bi-directional hydraulic pump, a bi-directional hydraulic cylinder and two pilot-controlled check valves, wherein a shell of a bi-directional motor, the body of the bi-directional hydraulic pump, the body of the bi-directional hydraulic cylinder, the body of an overflow valve and bodies of the pilot-controlled check valves are integrally formed by a component. The bi-directional motor and the bi-directional hydraulic pump are located on a same shaft, and outlets on two ends of the bi-directional hydraulic pump are connected to inner cavities arranged at two sides of the bi-directional hydraulic cylinder through one pilot-controlled check valve. The two ends of piston rods of the bi-directional hydraulic cylinder are respectively connected with the rotary pin through a connecting rod. When the bi-directional motor turns left, the piston rod stretches out right, and the connecting rod drives the rotary pin to rotate and lock. After a power supply switches, the bi-directional motor turns right, the piston rods stretch out left, the connecting rod drives the rotary pin to rotate reversely and unlock. After the rotary pin rotates to a locking position or a unlocking position, the bi-directional motor stops to operate, high-pressure oil in the cylinder is kept under actions of the pilot-controlled check valves so as to lock the rotary pin. The electro-hydraulic integrated driver for the rotary pin of the container hanging tool has a compact structure, has no leakage pollution, and has an anti-overloading capability and a strong impact resistance capability.
Owner:PARKER HANNIFIN IND HYDRAULIC TECH SHANGHAI
High-load thrust sliding bearing capable of adjusting thermal deformation through self feedback
InactiveCN111120504AImprove bearing capacityImprove reliabilitySliding contact bearingsBearing unit rigid supportThermodynamicsSlider bearing
The invention discloses a high-load thrust sliding bearing capable of adjusting thermal deformation through self feedback. The high-load thrust sliding bearing capable of adjusting thermal deformationthrough self feedback comprises a rotor, an axial positioning base, a thrust disc, bearing pads, bearing fulcrums, a fixed base, an oil retaining ring and the like. The thrust disc is connected withthe axial positioning base axially fixed on the rotor, and is opposite to the bearing pads, a bearing gap is reserved in the middle, each bearing fulcrum is arranged in the middle of the bottom of thecorresponding bearing pad, each bearing pad can rotate around the corresponding bearing fulcrum in a small range, and circumferential oil holes and longitudinal oil holes which communicate with eachother are formed in each bearing pad. According to the high-load thrust sliding bearing capable of adjusting thermal deformation through self feedback, by guiding bearing hot oil to the back surfacesof the bearing pads, the upper surface temperature and the lower surface temperature of the bearing pads tend to be consistent, the thermal deformation counteracts each other, the warping deformationof the bearing pads is reduced, and the bearing capacity and the safety of the bearing are improved.
Owner:XI AN JIAOTONG UNIV
High-flexibility nine-rod two-degree-of-freedom mechanical loading mechanism
InactiveCN103741737AImprove mechanical propertiesSuitable designMechanical machines/dredgersKinematicsEngineering
Owner:GUANGXI UNIV
Forwards-overturning night-rod two-freedom-degree mechanical loading mechanism
InactiveCN103741734AImprove mechanical propertiesSuitable designMechanical machines/dredgersKinematicsEngineering
The invention relates to a forwards-overturning night-rod two-freedom-degree mechanical loading mechanism which is formed by a rack, a movable arm control branched chain and a bucket control branched chain. The movable arm control branched chain is controlled by a first driving rod and conducts movable arm ascending or descending operation, the bucket control branched chain is controlled by a second driving rod to enable a bucket to be overturned, and the movable arm control branched chain is matched with the bucket control branched chain to jointly complete loading and unloading operation of the mechanical loading mechanism. All rod pieces of the mechanical loading mechanism are in rotary pair connection, and the shortcomings that a traditional moving-pair-contained full hydraulic type loading mechanism is high in manufacturing cost, poor in reliability, high in repairing and maintaining cost and the like are overcome; compared with other controllable-structure type loading mechanisms, the mechanical loading mechanism is compact in structure and large in rigidity, a brand new structure with the excellent kinematics and dynamics performance is adopted, and the reliability and the dynamic stability of the loading mechanism are good.
Owner:GUANGXI UNIV
All balance long stroke oil pump
InactiveCN1924288AImprove impact resistanceImprove anti-overload performanceFluid removalReciprocating motionElectric machinery
This invention provides balance long impact oil extraction device, which comprises motor, automatic brake, decelerator input axis, decelerator, decelerator output axis and sheave parts on shell top platform, wherein, the drive rope is connected to hanging device and ring through drive rope fix device two end set inside sheave parts; the hanging rope and ring are connected through light bar and match parts; when sheave rotates, it drives rope and match drive rope for synchronous reverse movement.
Owner:北京华能通达能源科技有限公司
Magnetic fluid flywheel for spacecraft
ActiveCN110435932AAvoid Frictional DampingAvoiding wear and tear challengesCosmonautic vehiclesSpacecraft guiding apparatusPotential differenceAngular momentum
The invention discloses a magnetic fluid flywheel for a spacecraft, which is capable of avoiding the problems of friction damping and abrasion of a conventional mechanical flywheel and prolonging theservice life and the overload resistance, and belongs to an attitude control system of the spacecraft. The magnetic fluid flywheel comprises a conductive fluid ring component, a magnetic steel component and electrodes. The magnetic fluid flywheel is simple in structure, high in assembly precision and convenient to replace. The magnetic steel component is used for providing a high-strength uniformvertical main magnetic field for a conductive fluid, a positive electrode and a negative electrode of the magnetic fluid flywheel are lead out by the two electrodes, the positive electrode and the negative electrode are electrified to enable the inner wall and the outer wall of a fluid ring to form a potential difference, the conductive fluid is stressed to rotate through the charge movement, andthe conductive fluid in the conductive fluid ring component can rotate to generate torque and angular momentum in order to realize the low-disturbance ultra-quiet index of the magnetic fluid flywheel.
Owner:BEIJING INST OF CONTROL ENG
High-overload-resistant double-stator-rotor series ultrasonic motor and implementation mode
ActiveCN113206617AImprove anti-overload performanceGood preload consistencyPiezoelectric/electrostriction/magnetostriction machinesRubber ringElectric machinery
The invention relates to a high-overload-resistant double-stator-rotor series ultrasonic motor and an implementation mode. The ultrasonic motor comprises a middle shell, the center of the middle shell is taken as a central point, and the middle shell is divided into two symmetrical parts by a symmetrical section penetrating through the central point along the radial direction of the middle shell; a rotor assembly and a stator assembly are arranged in each part in a sleeving manner, and the rotor assemblies of the two parts are arranged in series close to the symmetric section; stator seats are installed at the ends of the middle shell respectively, stator supporting frames and first buffer rubber rings are distributed on the surfaces of the stator seats, protruding cylinders are arranged in the centers of the stator seats, the protruding cylinders are sleeved with the stator supporting frames, the first buffer rubber rings and the stator supporting frames are coaxially arranged, and disc springs are distributed between the stator seats and the stator supporting frames. The stator assembly sleeves the stator support frame, and the tooth surface of the stator assembly sleeves the rotor assembly; the stator and the rotor can bear high overload impact in the positive and negative axial directions, and meanwhile, the high overload resistance is achieved.
Owner:NUAA SUPER CONTROL TECHNOLOGY CO LTD +1
Novel horizontal dry-type power transformer
PendingCN108597762AImprove anti-overload performanceImprove distributionTransformers/inductances coolingTransformers/inductances coils/windings/connectionsTransformerLow voltage
The invention relates to a novel horizontal dry-type power transformer, comprising a horizontal iron core and a shell, wherein the horizontal iron core is externally provided with a low-voltage coil,a main insulating air channel between a high-voltage coil and the low-voltage coil, and the high-voltage coil; one side of the horizontal iron core is provided with a high-voltage lead, a high-voltagelead screw, a high-voltage lead insulator, a low-voltage side insulator, a low-voltage side zero line row and a low-voltage side outgoing line row; the other side of the horizontal iron core is provided with a fan for cooling the device body and a guide baffle; and the upper and lower end surfaces of the horizontal iron core are provided with horizontal iron core clamps. According to the horizontal dry-type transformer disclosed by the invention, the device body is horizontally installed, occupies a small space, and can be conveniently installed in a mobile power supply station, and moreover,the horizontal dry-type transformer is particularly suitable for being used as a transformer of a mobile power supply due to the characteristics of no flammability and explosion, a special ventilation and heat dissipation structure of the horizontal dry-type transformer is beneficial to the dissipation of heat generated during the operation of the transformer, and the efficiency of forced heat dissipation can greatly enhance the overload resistance of the transformer.
Owner:JIANGSU HUACHEN TRANSFORMER
Two-DOF (degree of freedom) controllable mechanical loading mechanism
InactiveCN103711160AImprove mechanical propertiesSuitable designMechanical machines/dredgersKinematicsEngineering
The invention relates to a two-DOF (degree of freedom) controllable mechanical loading mechanism comprising a frame, a moving arm lifting branch and a bucket control branch. The moving arm lifting branch is controlled through a first driving bar to ascend or descend the moving arm. The bucket control branch is controlled through a second driving bar to overturn a bucket. The mechanical loading mechanism functionally finishes loading under coordination of the moving arm lifting branch and the bucket control branch. Members in the mechanical loading mechanism are all connected through revolute pairs; accordingly, the defects that the traditional full-hydraulic loading mechanism comprising prismatic pairs is high in manufacture cost, poor in reliability, high in maintenance cost and the like are overcome; compared to other controllable loading mechanisms, the mechanical loading mechanism is more compact in structure and higher in rigidity; with the brand-new structure having more excellent kinematic and dynamic performances, the mechanical loading mechanism is better in reliability and dynamic stability.
Owner:GUANGXI UNIV
Combined micro-accelerometer
InactiveCN101017180AImprove anti-interference abilityImprove anti-overload performanceAcceleration measurementSelf-propelled projectilesElectrical resistance and conductanceAccelerometer
This invention relates to one micro speeder for normal bullet process anti-high load compound meter, which comprises four sets of micro speeder units, wherein, the units are set by two times two array; two above rows pressure sensitive resistance is set along beam length direction; down two sets of micro speeders pressure resistance along fix beam width direction; each micro speeder unit frame is of one integral one.
Owner:ZHONGBEI UNIV
Ultra high performance concrete rib plate with rib bottom steel plate and machining method thereof
PendingCN109577189AGive full play to the tensile strengthImprove crack resistanceCeramic shaping apparatusBridge structural detailsSheet steelWhole body
The invention provides an ultra high performance concrete rib plate with a rib bottom steel plate and a machining method thereof. The ultra high performance concrete rib plate with the rib bottom steel plate is mainly to solve technical problems, such as easy fatigue cracking, poorer tensile and compressive performance, low section utilization efficiency and high cost, of an existing ultra high performance concrete rib plate. The key point of the technical scheme is that more than three plate ribs (2) are arranged at the bottom of a panel (1) to be connected with the panel (1) to form a wholebody; a reinforcing mesh (5) is arranged in the panel (1); the rib bottom steel plate (3) is arranged at the bottom of a rib body (7); a shear connector (4) is arranged on the upper surface of the ribbottom steel plate (3); a hoop (6) is arranged at the lower part of the reinforcing mesh (5); the hoop (6) is fixedly connected with the shear connector (4) so that the reinforcing mesh (5) is connected with the hoop (6) and the shear connector (4) to form an integral reinforcement structure; and ultra high performance concrete is poured outside the reinforcing mesh (5), the hoop (6) and the shear connector (4) to form the panel (1) and the plate ribs (2) which are connected to form a whole body.
Owner:HUNAN UNIV +1
Nine-bar two degrees-freedom minitype controllable mechanical loading machine
InactiveCN103711156AImprove mechanical propertiesSuitable designMechanical machines/dredgersKinematicsEngineering
The invention discloses a nine-bar two degrees-freedom minitype controllable mechanical loading machine. The mechanical loading machine consists of a frame, a movable arm control branched-chain and a bucket control branched-chain, wherein the movable arm control branched-chain is controlled by a first driving rod and lifts or descends a movable arm, the bucket control branched-chain is controlled by a second driving rod and overturns a bucket, and the loading and unloading operation of the mechanical loading mechanism is finished by the interaction between the movable arm control branched-chain and the bucket control branched-chain. The member bars of the mechanical loading machine are connected through revolute pairs, thereby preventing the defects that a traditional full hydraulic loading mechanism containing the movable pairs is high in price, bad in reliability and high in maintenance cost; and compared with other controllable mechanism loading mechanisms, the mechanical loading mechanism is compact in structure and strong in rigidity, and has a brand new configuration with more excellent kinematic and dynamic performances, so that the loading mechanism is better in reliability and dynamic stability.
Owner:GUANGXI UNIV
Micromechanics accelerometer
The invention discloses a micromechanics accelerometer which comprises a chip, connection parts, a plurality of sensitive bodies, wherein a first ligand is fixedly arranged on the chip, and the plurality of sensitive bodies are connected with the chip through corresponding connection parts. A plurality of connection parts are different in rigidity, so that the sensitive bodies can measure accelerated speeds in different ranges. The micromechanics accelerometer integrates the sensitive units which are different in ranges and are nested layer by layer, so that accelerated speeds in different ranges can be measured by corresponding sensitive units. Therefore, accuracy and precision of measurement can be increased effectively by means of the measurement mode. Furthermore, the plurality of sensitive units are nested layer by layer. Accordingly, compared with the existing accelerometer, the micromechanics accelerometer is compact in structure and small in size.
Owner:TSINGHUA UNIV
Vertical shaft wind-driven generation system structure and control method thereof
InactiveCN102392792AImprove output efficiencyImprove self-starting abilityWind motor controlMachines/enginesWind drivenAutomotive engineering
The invention discloses a vertical shaft wind-driven generation system structure and a control method thereof, belonging to the technical field of wind-driven generation. The structure comprises a bracket, a fixed pitch angle blade, a top combination component, a generator and a bottom combination component, wherein the top combination component consists of a bearing and top chassis; the bottom combination component comprises a braking device, a data gathering and controlling module, an energy consumption resistor and a base; the structure is characterized in that a fixed connecting rod in prior art is replaced by a middle control combination with adjustable and controllable pitch angle. The control method of the structure comprises the steps of: (1) setting an allowable value; (2) making the blade of a pitch variable fan vertical to the ground; (3) sampling an output signal regularly; (4) making a comparison between the collected value and the set value; (5) determining whether the collecting value is beyond the set value, if so, carrying out step (6), if not so, carrying out step (7); (6) making the blade of the pitch variable fan parallel to the ground; (7) changing the windward angle, and performing (8); (8) determining whether the wind speed is more than the rated wind speed, if so, access an energy consumption resistor, and returning to step (3); if not so, carrying out step (9); and (9) determining whether current wind speed is less than the accessed wind speed, if so, stopping operating the system, if not so, returning to step (3).
Owner:TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Excircle cavity opening type dynamic-static pressure main shaft unit
ActiveCN102588437AExtended service lifeImprove reliabilityShaftsBearingsMechanical engineeringPower consumption
The invention provides an excircle cavity opening type dynamic-static pressure main shaft unit. The excircle cavity opening type dynamic-static pressure main shaft unit comprises a dynamic-static pressure main shaft, a dynamic-static pressure bearing and an oil supply system, wherein the shaft neck excircle cylindrical surface of the dynamic-static pressure main shaft is provided with a plurality of oil chambers which are uniformly distributed circumferentially. The dynamic-static pressure main shaft unit provided by the invention has the beneficial effects that as the dynamic-static pressure main shaft is made of steel, the oil chambers can be more conveniently arranged on the excircle cylindrical surface of the dynamic-static pressure main shaft than on the inner wall of the dynamic-static pressure bearing, and are easy to process, thereby greatly reducing processing difficulty, saving cost, and improving labour productivity; and the dynamic-static pressure main shaft unit not only has the advantages of small original static pressure support driving power and the like compared with the traditional dynamic-static pressure main shaft unit, but also reduces start power consumption and prolongs the service life of the bearing, thereby increasing the reliability and overload resistance capacity of the bearing.
Owner:SHANDONG BEST PRECISION
Intelligent projector
InactiveCN106950790AImprove practicalityImprove reliabilityProjectorsStands/trestlesDrive wheelGear wheel
The invention relates to an intelligent projector, which comprises a pedestal, a projection mechanism, a supporting frame and an adjusting mechanism. A mounting assembly comprises a first mounting unit and a second mounting unit. The first mounting unit comprises a motor, a worm, a driving wheel and a first bolt. The second mounting unit comprises a first fixing shaft, a first cylindrical gear, a first connecting rod, and a second bolt. The adjusting mechanism comprises a second cylindrical gear and a locking mechanism. Through the mounting assembly, a fixing block can be connected reliably and fixedly, so the pedestal and the supporting frame can be detached flexibly, and the projector is improved in practicability. Moreover, the adjusting mechanism can adjust angles of the projection mechanism, and also can fix and limit the projection mechanism, so the reliability of the projector is improved.
Owner:广东大板牙智能科技有限公司
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