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197 results about "Load distribution" patented technology

The term load distribution is the spreading out of a load over a larger area. Load distribution is a key element in the design of a structural member. The design of footings, foundation walls, slabs on grade, pile caps, grade beams, are all designed to distribute a load.

Hybrid beam cable-stayed bridge side span concrete main beam cast-in-place support and dismantling construction method thereof

The invention relates to the technical field of bridge construction, in particular to a hybrid beam cable-stayed bridge side span concrete main beam cast-in-place support and a dismantling construction method thereof, and the cast-in-place support comprises a side main beam supporting frame, a top plate supporting frame and a distribution structure; the distribution structure comprises a plurality of bearing main beams and a plurality of distribution beams; the plurality of sand cylinders are used for supporting the bearing main beam; the bailey beams are arranged between the bearing main beams and the distribution beams at intervals; the distribution beams support the side girder pouring formwork and the top plate supporting frame, and the top plate supporting frame supports the top plate pouring formwork. Through a multi-stage load distribution structure of the bearing main beam, the distribution beams and the sand cylinders, load distribution of supporting points is optimized, the overall stability of the support is improved, the bailey beams effectively disperse loads through a stress mechanism of trusses of the bailey beams, a rigid connection system is formed by the bailey beams and the bearing main beam, and the overall section flexural rigidity of a bearing component is improved; the method can ensure that the supporting system keeps a stable geometrical shape in the construction process.
Owner:GUIZHOU HIGHWAY ENG GRP

Cantilever structure for bay window of building

The utility model discloses an overhanging structure for a bay window of a building, which belongs to the technical field of bay window overhanging, comprises a bay window component, and is characterized in that an upper hanging component and a lower supporting component are arranged, so that the bay window component can be hung on the bay window; the mode that a traditional cantilever structure purely depends on a cantilever beam or plate to extend outwards from a building body to support a bay window is changed, bay window load distribution is more uniform, too large bending moment is prevented from being generated at the cantilever root, the large section size and the reinforcement quantity needed by the position for resisting the bending moment are reduced, the material cost and the structure self weight are reduced to a certain degree, and the construction efficiency is improved. Meanwhile, by means of the up-and-down cooperative supporting and hanging mode, better performance can be achieved in the aspect of resisting upsetting moment caused by lateral force generated by strong wind or earthquakes, the structural stability is enhanced, and compared with traditional cantilever structure construction, the structure does not need to be like a traditional cantilever structure.
Owner:SINKIANG CORPS NONGSHISAN DIVISION CONSTR INSTALLATION GENERAL CO

Gasket detection device

The utility model relates to the technical field of gasket detection, especially gasket detection device, including control cabinet, still including the material receiving box, the right side of control cabinet is provided with the feeding assembly, the top of control cabinet is provided with conveying assembly, the top of control cabinet is fixed with mounting seat, the top of mounting seat is installed with visual inspection module, the outside of visual inspection module is provided with shading assembly, the left side of the top of control cabinet is provided with mounting frame, the inside rotation of mounting frame is connected with the lead screw, the front end of mounting frame is fixed with drive motor, the output of drive motor is connected with the lead screw, and drive motor is used for driving the rotation of lead screw, the utility model discloses a lead screw drive structure is used to drive the front and back buffering of material receiving box, can even spread out the gasket of internal accumulation, significantly improve the uniformity of load distribution, avoid the uneven stress problem caused by local accumulation, the design effectively reduces the overflow risk of gasket in the process of transportation or vibration.
Owner:JIANGSU MAYU AUTOMOTIVE FASTENER MFG CO LTD

Process for producing 65mn by thin slab continuous casting and rolling

This invention discloses a process for producing 65Mn steel through continuous casting and rolling of thin slabs, belonging to the field of steel production. The method includes the following steps: steelmaking, casting and rolling, and slow cooling. The steel composition is controlled as follows: C: 0.62%-0.70%, Si: 0.17%-0.37%, Mn: 0.90%-1.20%, P≤0.035%, S≤0.030%, Cr≤0.20%, Ni≤0.30%, Cu≤0.25%, with the balance being Fe and impurities. In the continuous casting process, the slab thickness is 90mm-110mm, the casting speed is controlled at 4.0m / min-4.8m / min, and the temperature difference of the slab cross-section is controlled at 40℃-65℃. In the finishing rolling process, the F3 work roll uses high-speed steel rolls, and the F4 and F5 work rolls use high-nickel-chromium rolls. The crown of the F3 work roll is set to be 200µm larger than that of other steel grades, and the load distribution of each stand follows a decreasing principle. Compared with existing technologies, this method improves the yield rate of straight hair curls.
Owner:RIZHAO STEEL HLDG GROUP

Cold insulation structure and low-temperature full-capacity tank

The utility model relates to the technical field, in particular to a cold insulation structure and a low-temperature full-capacity tank. The cold insulation structure comprises a ring beam, a first load distribution layer, a first heat insulation layer, a cold insulation layer, a second load distribution layer, a second heat insulation layer and a foundation platform, the ring beam is arranged at the bottom of the inner tank; the first load distribution layer is located in the ring beam and used for being arranged at the bottom of the inner tank. The first heat insulation layer comprises a first part and a second part, the first part is located in the ring beam and connected with the load distribution layer, and the second part is connected with the bottom of the ring beam; the cold insulation layer is positioned below the first heat insulation layer and is connected with the first heat insulation layer; the second load distribution layer is arranged at the bottom of the outer tank; the second heat insulation layer is positioned below the second load distribution layer and is connected with the second load distribution layer; the foundation platform is located below the second heat insulation layer and connected with the second heat insulation layer. The deformation and damage probability of the heat insulation layer and the cold insulation layer can be effectively reduced, and therefore the freezing probability of the foundation platform is reduced.
Owner:CHENGDU SHENLENG CRYOGENIC TECH CO LTD

A front wall, a method of manufacturing a front wall, and a vehicle

The application belongs to the technical field of vehicle body parts, and relates to a front wall, a front wall manufacturing method and a vehicle. The front wall comprises an upper plate, a lower plate, a reinforcing cross beam and a patch plate. The reinforcing cross beam is connected between the upper plate and the lower plate. The patch plate is attached to the connection between the upper plate and the reinforcing cross beam and / or the connection between the lower plate and the reinforcing cross beam. The upper plate, the lower plate, the reinforcing cross beam and the patch plate are hot-stamping formed into an integrated structure. The application can improve the overall stress distribution when the front wall is loaded, improve the safety of the vehicle during a collision, and obtain an integrated structure through hot-stamping forming without additional connection or sealing. The integrated structure can further meet the lightweighting requirements of the vehicle, improve the load distribution through the overall load bearing mode of the integrated structure, reduce stress concentration, further improve the overall strength, and be conducive to meeting the lightweighting and safety requirements.
Owner:DEEPAL AUTOMOBILE TECH CO LTD

Multiple bridge line climbing saddle

PendingUS20260192136A1Load distributionControl theory
An improved tree saddle assembly includes a saddle configured to wrap about a user for support while tethered to a tree by a tether line. A bridge line assembly provides two distinct, forward-extending loops: a first bridge line coupled to left and right attachment locations on a first portion of the saddle, and a separate second bridge line coupled to left and right attachment locations on a second portion of the saddle. Each bridge line forms a loop with an apex configured for attachment to the tether line. The first and second bridge line loops are independently adjustable in effective length, enabling selective repositioning of the saddle's first and second portions relative to one another while the user remains tethered. This independent adjustability permits fine-tuned balance and comfort adjustments, improving load distribution and user positioning without requiring disengagement from the tether.
Owner:AVID STRATEGIC LLC

Method and system for quantitatively evaluating building flexibility energy capability, and storage medium

This application provides a method, system, and storage medium for quantitatively assessing a building's flexible energy utilization capacity. The method includes: collecting historical building operation data and constructing input features; based on the input features, establishing a building load behavior baseline prediction model using quantile regression to predict the typical load operation baseline and its upper and lower fluctuation amplitudes at each time point; constructing a similar sample set based on samples from the historical operation data sample that have similar operation attributes to the time point to be assessed; taking the high and low quantile values ​​of the load distribution from the similar sample set as the original upper and lower boundaries of the load at the time point to be assessed, and correcting the upper and lower fluctuation amplitudes of the typical load operation baseline at the time point to be assessed to obtain the final feasible upper and lower boundaries; calculating the instantaneous downward and upward adjustment power based on the load behavior baseline prediction model and the feasible upper and lower boundaries; calculating the continuous downward and upward adjustment energy within the control time window; and obtaining the building's flexible energy utilization capacity index.
Owner:ZHONGKE HUAYUE (BEIJING) ENERGY INTERNET RES INST CO LTD +2

A launch mechanism for AUV underwater payload deployment

The application discloses a launching mechanism for AUV underwater load distribution, which comprises an AUV internal load rotating device, a fixed launching device, a launching trigger device, a load and a launching trigger arc plate; the AUV internal load rotating device is driven by a waterproof motor to drive the fixed launching device, the launching trigger device and the load to rotate synchronously; the fixed launching device provides launching force through a torsion spring to realize the fixation and ejection of the load; the launching trigger device cooperates with the launching trigger arc plate fixed on the AUV shell to complete triggering through contact extrusion; the launching trigger arc plate is provided with a multi-hole and multi-groove structure and can realize the position adjustment in the circumferential and height directions; the application can realize the orderly launching of multiple loads in a short time, significantly reduces the interference on the sailing posture of the AUV, improves the safety and reliability of the load distribution, and is suitable for the load distribution requirements in multiple scenes such as seabed exploration, underwater rescue and national defense reconnaissance.
Owner:SANYA YAZHOU BAY INST OF DEEP SEA SCI & TECH SHANGHAI JIAOTONG UNIV

Weight loading mechanism and mass comparator

The utility model relates to the technical field of mass measurement, and discloses a weight loading mechanism and a mass comparator, and the weight loading mechanism is arranged on the mass comparator to adjust the load distribution at the two ends of a balance beam so as to expand the measurement range. The weight loading mechanism comprises a plurality of counterweights which can be used independently or in a combined mode, at least two butt joint parts and a loading assembly. The butt joint parts are arranged at the first end and the second end of the balance beam respectively and used for being in butt joint with the corresponding counterweights. The loading assembly comprises a driving mechanism and a stowage piece, and the stowage piece is connected with the driving mechanism in a matched mode and can drive the corresponding balance weights to move. When the driving mechanism operates, the stowage piece can load part or all of the counterweights to the two ends of the balance beam or unload the counterweights from the two ends of the balance beam so as to dynamically adjust load distribution, so that the mass comparator can adapt to measurement requirements of different mass ranges, and the measurement stability and precision are improved.
Owner:SHANGHAI METROLOGY & TESTING TECHNOLOGY RESEARCH INSTITUTE CO LTD

Tunnel lining load distribution method and device based on single-layer and double-layer model coordinated deformation

The invention discloses a tunnel lining load distribution method and device based on single-layer and double-layer model coordinated deformation, and relates to the technical field of tunnel composite lining design. The method comprises the steps that a tunnel double-layer model structure is established according to surrounding rock parameters and a load distribution form, the tunnel double-layer model structure is used for simulating coordinated deformation between a primary support layer and a secondary lining layer, and the displacement response of the secondary lining layer is calculated through loading. And on the basis, a tunnel single-layer structure model without a primary support layer is established, iterative solution is performed through the displacement mapping relation according to the displacement response of the secondary lining in the composite lining tunnel, and a target load distribution coefficient is obtained. By constructing the tunnel double-layer model structure and utilizing the displacement mapping relation to carry out iterative calculation, dynamic quantitative evaluation of the stress state of the secondary lining is achieved, the accuracy and reliability of load distribution proportion analysis are improved, and therefore the stability and construction safety of the tunnel structure are effectively guaranteed.
Owner:WUHAN UNIV OF TECH

Flexible thin-wall crossed roller bearing multi-target parameter optimization method

A flexible thin-wall crossed roller bearing multi-target parameter optimization method relates to the technical field of bearing design, and comprises the following steps: 1, establishing a parameterized system model containing a shaft system, a thin-wall crossed roller bearing and a box body assembly relation, the bearing model being determined by geometric and assembly parameters; 2, carrying out finite element modeling on the inner / outer ring of the bearing, and carrying out polycondensation on the degree of freedom of an interface to obtain an equivalent stiffness matrix; 3, inputting working conditions and material parameters, and setting a design variable feasible region and constraints; 4, coupling a mapping matrix to solve load distribution, calculating the maximum contact stress and the life damage rate, and constructing a dual-objective optimization model; 5, performing test design to obtain response data, and performing multi-target algorithm iterative optimization to obtain a Pareto optimal solution set; and 6, screening the solution set, and outputting a structure parameter combination meeting the requirement. The method can solve the problems that in the prior art, it is difficult to consider calculation efficiency and ferrule flexibility effect precision, and it is difficult to conduct rapid iterative optimization on roller load distribution and life / contact stress indexes.
Owner:HENAN UNIV OF SCI & TECH

Maintenance-free double-row deep groove ball bearing

The utility model discloses a maintenance-free double-row deep groove ball bearing which comprises a shaft sealing ring, a waterproof sealing ring, a wear-resistant sheet, a bearing wheel body, a bearing wheel hollow shaft, a bearing outer ring, a bearing inner ring, a first groove and a second groove, the bearing wheel hollow shaft is sleeved with a bearing wheel body, a maintenance-free double-row deep groove bearing is installed in the bearing wheel body, and the maintenance-free double-row deep groove bearing is fixedly connected to the bearing wheel hollow shaft. According to the maintenance-free double-row deep groove ball bearing, structural design is designed, dynamic and static dual protection is achieved through the collaborative design of the multiple layers of sealing pieces and the double rows of balls, the gap between the inner ring and the outer ring can be covered through the linkage design of the bearing pressing pieces and the multiple layers of sealing pieces, load distribution is optimized through the double rows of symmetrically-distributed balls, and the service life of the ball bearing is prolonged. The radial bearing capacity and the axial bearing capacity are remarkably improved, local stress concentration caused by deviation of a single-row bearing is avoided, and the bearing capacity and stability of the bearing are remarkably improved through symmetrical layout and geometric optimization of the double-row balls.
Owner:QUANZHOU SONGTELI CONSTR MASCH CO LTD

Electric drive axle test run loading tool lifting appliance

The utility model discloses an electric drive axle test run loading tool lifting appliance, which belongs to the technical field of lifting equipment, and comprises a connecting shaft, one end of the connecting shaft is provided with a clamping hook, the other end of the connecting shaft is provided with a clamping body structure, the clamping body structure comprises a clamping arm I and a clamping arm II, and the clamping arm I and the clamping arm II have the same shape, are oppositely arranged and can be matched to form the clamping body structure; the clamping body structure further comprises a spring bolt capable of limiting the maximum opening angle of the clamping body structure. When the connecting shaft is in a horizontal state, the bottom of the clamping body structure is lower than the bottom of the clamping hook, the clamping body structure and the clamping hook are matched to be connected with the two ends of the electric drive axle tool body, and the axis of the electric drive axle tool body is kept parallel to the connecting shaft. When the connecting shaft is in a horizontal state, quick clamping of the tool body can be achieved, manual adjustment time and operation difficulty are reduced, horizontal hoisting of the axis of the tool body is kept, optimization of load distribution is facilitated, local stress concentration is avoided, and the damage risk is reduced.
Owner:CHINA HEAVY VEHICLE GRP JINAN QIAOXIANG CO LTD

A variable-height connection structure of a square steel pipe concrete column and a concrete beam

The utility model discloses a square steel pipe concrete column and concrete beam's variable height difference connecting structure, including square steel pipe concrete column and concrete frame beam, the concrete frame beam of two side edges is arranged with one section height staggered, and square steel pipe concrete column includes square steel pipe and column concrete, and concrete frame beam includes H type steel, upper beam longitudinal reinforcement, lower beam longitudinal reinforcement and pours beam concrete, and the end of H type steel is welded with the outer wall of square steel pipe, and upper beam longitudinal reinforcement and lower beam longitudinal reinforcement are welded with H type steel. Through setting variable height difference connection, can make stress distribution more uniform, reduce stress concentration phenomenon, improve the connecting strength and stability, can adjust the height difference of connecting portion according to the demand, and the building of different height requirement is adapted, can according to actual load distribution situation, the beam height is adjusted flexibly, makes the structure more reasonable and economic, can avoid using too many materials in the part of not needing high bearing capacity, thereby saves steel and concrete, reduces cost.
Owner:CHINA CONSTR TECH GRP SOUTH CHINA CO LTD +1

Double-axis control method and system for cone beam computed tomography equipment

The invention discloses a double-axis control method and system for cone beam computed tomography equipment, and relates to the technical field of equipment control, and the method comprises the following steps: obtaining guide rail contact state data of a rotating arm at different heights and angles, and constructing a guide rail load distribution topology; identifying the offset state of the load action line based on the guide rail load distribution topology, and performing time sequence expansion on the guide rail load distribution topology based on the offset state to obtain a guide rail stress unbalance set; performing coupling reconstruction on the target motion paths of the rotating shaft and the lifting shaft based on the guide rail stress unbalance set to obtain a double-shaft cooperative motion track; coordinately adjusting the movement speed change process of the rotating shaft and the lifting shaft to obtain a load balance state; the double-shaft driving control instruction is generated based on the load balance state, the rotating arm is controlled to complete the posture adjusting process, and the problem that in the double-shaft cooperative movement process, due to the dynamic change of load distribution of the rotating arm, the stress of a guide rail contact interface is unbalanced is solved.
Owner:TAIZHOU INST OF MEASUREMENT TECH

Combined multifunctional emergency rescue protective net

The utility model provides a combined type multifunctional emergency rescue protective net which comprises a base, the base is a supporting chassis of a circular structure, a middle supporting frame is arranged in the middle of the base, a plurality of sets of side supporting frames are arranged on the outer side of the base at equal angles, a protective frame is rotationally installed at the upper ends of the side supporting frames, and the upper end of the middle supporting frame is rotationally installed on the inner side of the protective frame. A ball head is arranged at the upper end of the vertical buffer, a rotating block is rotationally installed through the ball head, a buffer structure block is fixedly installed at the upper end of the middle supporting frame, and the rotating block is fixedly installed on the outer side of the protection frame. According to the utility model, the impact force vector is optimized: the horizontal component of the impact force is improved by the inclined net surface, and the impact pressure in the vertical direction is effectively reduced; according to the composite buffering mechanism, a core buffering assembly adopts a three-stage energy dissipation design, first-stage buffering is that an outer frame and an inner frame form a rotating pair, second-stage buffering is that a hydraulic buffering rod provides axial damping, and third-stage buffering is that titanium alloy telescopic strips are arranged in a staggered mode, so that multidirectional load distribution is achieved.
Owner:ANHUI HYY IMPORT & EXPORT CO LTD

Structural dynamic load identification method based on dynamic displacement inversion and motion control equation

This invention discloses a method for identifying dynamic loads on structures based on dynamic displacement inversion and motion control equations. The method includes: dividing the structure under test into several four-node inverse shell elements; deploying sensors at the centroid positions of the upper and lower surfaces of each element; reconstructing the displacement values ​​of each element node based on the collected strain data; predicting the displacement values ​​at any position of the structure under test using a high-resolution spatial domain reconstruction algorithm based on the reconstructed displacement values ​​of each element node; discretizing the fourth-order spatial deflection derivative of the displacement field of the structure under test using the finite difference method; approximating the second-order derivative of the strain data using the second-order central difference method to obtain the higher-order spatiotemporal deflection derivative; and establishing a model of the relationship between the dynamic displacement and load distribution of the structure under test by combining the motion control equations of the structure under test, thereby achieving dynamic load identification of the structure under test. Given the known geometry and material properties of the structure, this method can not only reconstruct the time history of the dynamic loads on the structure but also simultaneously identify the load application positions.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

House jacking system based on multiple electric screw jacks

The invention relates to the technical field of building construction equipment, and discloses a house jacking system based on multiple electric screw jacks, comprising: an electric screw jack module for jacking a house; the sensor network module is used for collecting jack states and environment data in real time; the central control module is used for calculating a synchronization error based on sensor data and adjusting the jacking speed through a PID (Proportion Integration Differentiation) algorithm; the intelligent prediction and adjustment module predicts load distribution by using machine learning and dynamically adjusts control parameters; and the fault-tolerant and exception handling module monitors exceptions and automatically adjusts system operation to ensure safety and stability. According to the method, the technical scheme of intelligent prediction and dynamic parameter adjustment is adopted, accurate pre-judgment and real-time response to load fluctuation in the house jacking process are achieved, and by adjusting control parameters in advance, the system can remarkably reduce synchronous errors and improve the coordination of jacking operation.
Owner:HANGZHOU MINJIE MASCH CO LTD

Steel pipe stereoscopic warehouse intelligent access method and system based on load balancing

The invention discloses a steel pipe stereoscopic warehouse intelligent access method and system based on load balancing, and the method comprises a storage position distribution step: when a steel pipe to be warehoused exists, based on the load distribution state of a current goods shelf, through calculating a plurality of scoring factors of each available storage position and carrying out comprehensive scoring, dynamically distributing storage positions for the steel pipe to be warehoused, the overall stress balance of the goods shelf is realized; and a warehouse-out hit step: when a warehouse-out task exists, based on the load distribution state of the current shelf and the position of the stacker, calculating a plurality of hit factors of each candidate storage position storing the target steel pipe and carrying out comprehensive scoring, and selecting an optimal storage position from the candidate storage positions to execute warehouse-out operation. Meanwhile, the warehouse-out path is optimized and the balance of the goods shelf is maintained. According to the invention, through a dynamic scoring strategy of coupling load balancing and path optimization, the warehouse-in storage location distribution and warehouse-out hit selection of the steel pipes are synchronously optimized, so that the structural safety and the operation efficiency of the three-dimensional warehouse are improved.
Owner:KEDA INTELLIGENT IOT TECH CO LTD +1

A milling cutter with star-shaped wire edge and an optimization method thereof

ActiveCN121339535BGeometric CADMilling cuttersTool bitSingle star
The application discloses a milling cutter with star-shaped line cutting edges and an optimization method thereof, and relates to the technical field of milling cutter design, which comprises the following steps: determining the initial value of a scale factor based on production target parameters, adjusting the initial value in combination with the hardness value of a machining target material and cutting process parameters to obtain the accurate scale factor of a single star-shaped line cutting edge, constructing a milling cutter model, establishing a plane coordinate system at the center of a cutter head, determining the curvature of the star-shaped line according to a single star-shaped line cutting edge parameter equation containing the accurate scale factor and an angle change parameter, rotating the cutter head center by different angles to form a plurality of star-shaped line cutting edges with different positions, and respectively adopting a circular arc, a spline curve and a helical transition surface to optimize the transition connection between the sharp corners in the star-shaped line cutting edge, adjacent star-shaped line cutting edges and the star-shaped line cutting edge and the cylindrical surface of the cutter head, so as to help optimize the load distribution during cutting, reduce vibration and wear.
Owner:HARBIN UNIV OF SCI & TECH

Method and device for calculating torsion load distribution proportion of large-opening structure

The invention provides a large-opening structure torsion load distribution proportion calculation method and device, and belongs to the technical field of aircraft structure design. The method comprises the steps that a torsion model of a large-opening structure is constructed; based on the torsion model of the large-opening structure, determining the torque only generating free torsion under the torsion load of the large-opening structure and the torque only generating constrained torsion under the torsion load of the large-opening structure; a change rate expression of the torsion angle is constructed based on the torque only generating free torsion under the torsion load of the large-opening structure and the torque only generating constrained torsion under the torsion load of the large-opening structure; based on the change rate expression of the torque angle, the torque ratio of the free torsion to the constrained torsion is determined; determining the type of the large-opening structure, determining section parameters of the large-opening structure based on the type of the large-opening structure, and calculating the proportion of free torsion and constrained torsion under the torsion load of the large-opening structure based on the section parameters.
Owner:XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA

Overwater mobile platform

The utility model discloses an overwater mobile platform, which is formed by compounding a plurality of buoyancy body components with hollow structures through a stress structure component, so that the load distribution of the overwater mobile platform can be effectively optimized, and the stability and the reliability of the overwater mobile platform are improved. Meanwhile, the buoyancy force and the sinking prevention capacity of the water mobile platform can be increased through the sinking prevention assembly, and the safety of the water mobile platform under extreme conditions is ensured, so that through the combined design of the buoyancy body assembly of the hollow structure, the stress structure assembly, the sinking prevention assembly and the advancing power assembly, the sinking prevention capacity of the water mobile platform is improved; the water mobile platform has the advantages of being high in buoyancy, high in safety and multifunctional.
Owner:ZHUHAI HONGDIAN TECH CO LTD

Main bearing of heading machine and load distribution calculation method and system thereof

The application discloses a main bearing of a heading machine and a load distribution calculation method and system thereof, which is characterized in that: a first outer ring and a second outer ring are connected to form a whole outer ring, which is sleeved on an inner ring, only two rows of raceways are formed between the whole outer ring and the inner ring, cylindrical rolling elements are arranged on a main pushing raceway, and ball rolling elements are arranged on an auxiliary pushing raceway, the main pushing roller is in linear contact with the main pushing raceway, and the auxiliary pushing roller is in point contact with the auxiliary pushing raceway, so that a ball-cylinder combined rotary disc bearing structure in a point-linear mixed contact form is formed, and the load borne by the radial roller and the auxiliary pushing roller is relatively small compared with the main pushing roller in the main bearing structure of the heading machine, therefore, the auxiliary pushing roller can bear axial load, radial load and overturning moment load at the same time through the point contact form between the ball rolling elements and the auxiliary pushing raceway, and it is not necessary to separately arrange a row of radial rollers and corresponding raceways, so that the structure of the main bearing of the heading machine is greatly simplified under the premise of ensuring bearing reliability.
Owner:CHINA RAILWAY CONSTR HEAVY IND

Large-span cable bearing system bridge and bridge tower thereof

The invention provides a large-span cable bearing system bridge which comprises an upper tower column, a middle tower column and a lower tower column which are sequentially connected in the vertical direction to form a bridge tower structure. The upper tower column comprises a cylindrical steel structure shell, and a cavity extending in the axial direction is formed in the cylindrical steel structure shell. The concrete column is coaxially arranged in the middle of the cavity and fixedly connected with the inner wall of the steel structure shell; the multiple pairs of stay cables penetrate through the steel structure shell and are anchored to the two sides of the concrete column; wherein the side span stay cable is anchored on the side, facing the midspan of the bridge, of the concrete column, and the midspan stay cable is anchored on the side, facing the side span of the bridge, of the concrete column. The stay cables are anchored on the concrete column in the middle of the upper tower column in a crossed mode, the force arm of cable force is shortened from the width of the whole tower column to the width of the concrete column, and therefore the tower bottom bending moment is greatly reduced. Meanwhile, the layout actively guides the mid-span load to the side-span stay cables, so that the full-bridge load distribution is optimized, the original vicious circle is broken through, and the light weight of the bridge tower is realized.
Owner:CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE CO LTD

A gradient-based optimization composite material heavy load gear box shell and manufacturing process thereof

This invention discloses a heavy-duty gearbox shell based on gradient-optimized composite materials and its manufacturing process, relating to the fields of material design and equipment manufacturing technology. The shell body is an integrally formed gradient heterogeneous composite structure with the following gradient design: a core load-bearing layer located in the gear meshing area, bearing housing, and flange connection surface of the shell body, made of a composite powder of high-carbon chromium-molybdenum steel powder and nano-ceramic particles; a transition buffer layer connecting the core load-bearing layer and the lightweight support layer, made of a composite powder of medium-carbon alloy steel powder and short carbon fibers; and a lightweight support layer located on the sidewalls and non-stressed areas of the shell body, made of a composite powder of aluminum alloy powder and hollow ceramic microspheres. The thickness ratio of the core load-bearing layer, transition buffer layer, and lightweight support layer in the radial section is 1:1.4:1.6. This invention, based on a three-dimensional gradient heterogeneous composite structure, achieves precise matching of material properties and load distribution, optimizing and improving load-bearing capacity while maximizing lightweight design.
Owner:DONGGUAN AO PRECISION DIECASTING CO LTD

Method for controlling the width of a wedge-shaped strip based on a large side pressure device

The application discloses a wedge-shaped strip steel width control method based on a large side pressure device, which comprises the following steps: firstly, taking the width of one end of the wedge-shaped strip steel as a reference, calculating the width load distribution, and taking the first pass outlet width target as the first pass target width of the other end on the basis of keeping the roll gap value of the vertical roll constant, calculating the SP pressure; if there is no solution, taking the other end as the reference and repeating the above calculation; then, according to the SP pressure of the large and small end parts, the strip steel is rolled by changing the roll gap in the full length through the large side pressure device, and the rectangular strip steel is obtained after the pass rolling. The application avoids the problem that the wedge-shaped blank becomes inverted wedge-shaped after passing through the large side pressure when the roll gap of the vertical roll is constant, the E1 pressure of the first pass of the vertical roll is different, and fully utilizes the width adjusting capacity of the large side pressure device, and the width control precision of the wedge-shaped blank is improved.
Owner:BAOSHAN IRON & STEEL CO LTD

Construction decision optimization method for deformation joint lifting synchronous formwork erecting device

The invention relates to the technical field of building engineering construction, and particularly discloses a construction decision optimization method for a deformation joint lifting synchronous formwork supporting device, which comprises the following steps: judging non-uniform stress by comparing the real-time pressure of a lifting point, and if so, analyzing a height difference and associating a pressure-displacement curve to judge virtual synchronization; if virtual synchronization is judged, dividing a load influence area and quantifying load difference on two sides, and judging whether virtual synchronization is caused by large load difference; if the load difference is caused, calculating a theoretical weight coefficient of a lifting point, performing master-slave node grading on the lifting point, and establishing a global pressure coordination logic taking the dynamic weight coefficient as a core; according to the weight coefficient and the master-slave node division result, dynamic cooperative control is implemented, and a strategy is adjusted in real time, so that accurate judgment and inducement positioning of virtual synchronization are realized, pressure distribution is matched with load distribution, the problems of uneven stress and virtual synchronization are solved from the source, and the construction synchronization stability and quality are improved.
Owner:ZICHENG UNITED CONSTR GRP CO LTD