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268 results about "Displacement control" patented technology
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Displacement control. Process, in which the velocity of a hydraulic drive element is controlled by changing the geometric displacement of a pump or motor. This includes the pump control (Figure V 10 a) and secondary adjustment of a hydraulic motor (b) in the case of constant flow systems and secondary control of a hydraulic motor (c)...
Bottom die trolley walking control method and system
The invention belongs to the technical field of heavy-load vehicle control, and particularly discloses a bottom die trolley walking control method and system, and the control method comprises the steps: starting a task and setting parameters; collecting multi-dimensional data in real time; a displacement target is judged; calculating theoretical motion parameters; target torque distribution and instruction adjustment; and finishing the task and resetting the system. According to the control method, torque control, speed control, displacement control and energy consumption optimization are fused, a closed-loop feedback strategy, a fuzzy PID self-adaptive algorithm and a multi-motor cooperative algorithm are utilized, and track pre-detection and energy recovery are combined, so that the heavy-load and high-rigidity bottom die trolley can still run stably and accurately under the non-ideal track condition, and the control method is suitable for large-scale production. The control precision and stability of trolley running are remarkably improved, running deviation caused by poor rails and structural rigidity is reduced, the linear and dimensional precision of segmental beam prefabrication is guaranteed, and meanwhile the equipment failure rate, the maintenance cost and the energy consumption are reduced.
Owner:TUOBOYI (WUHAN) INTELLIGENT TECHNOLOGY CO LTD
Disturbance compensation control method for heave compensation winch
The invention discloses an interference compensation control method for a heave compensation winch. The method comprises the following steps: based on a state space model of a heave compensation winch system comprising a heave compensation winch and a pump station, establishing a backstepping controller through a backstepping control method; establishing a parameter online estimation module of the hydraulic motor of the heave compensation winch, and inputting and processing the initial identification parameters of the hydraulic motor and the dynamic regression vector of the hydraulic cylinder to obtain the identification parameters of the hydraulic motor updated in real time; and inputting the identification parameters and the operation parameters of the heave compensation winch into a backstepping controller, outputting a valve core displacement control instruction of a proportional servo valve of a pump station after processing, and further realizing interference compensation control of the heave compensation winch by controlling the pump station. By means of the method, high-precision tracking and robust stability control over the heave compensation winch system can be still kept under the conditions that the model is uncertain and disturbance is strong, and support is provided for the underwater high-precision operation requirement.
Owner:HAINAN RES INST OF ZHEJIANG UNIV
Linear friction welding reinforcement process method for deep cavity curved surface of complex uniform-section titanium alloy profile
The invention relates to the technical field of titanium alloy solid-phase pressure friction welding, in particular to a complex uniform-section titanium alloy profile deep cavity curved surface linear friction welding reinforcement process method which comprises the following steps: S1, equipment preparation: a titanium alloy Y profile and a rib plate are respectively clamped in an upsetting cylinder and a vibration cylinder of a hydraulic linear friction welding platform; the alignment precision is controlled to be smaller than or equal to 0.05 mm and the hydraulic clamping force is controlled to be smaller than or equal to 40 kN through a fine adjustment S2, parameter setting: based on finite element simulation, setting the amplitude of + / -5mm, the frequency of 50Hz, the friction pressure of 70kN, the upsetting pressure of 75kN, the upsetting time of 30s and the axial shortening amount of 5mm, and adopting a displacement control mode; according to the method, the reserved sectional area of the blank is reduced, the load and energy consumption of extrusion equipment are reduced, the manufacturing period is shortened, the material utilization rate is increased, the joint structure uniformity is improved through thermal-mechanical coupling regulation and dynamic recrystallization, the forming precision is improved, cutting waste liquid and dust emission is avoided, and the technological process is low-carbon and energy-saving.
Owner:BEIHANG UNIV +1
A pre-tensioning method bridge screw thread steel grading step-by-step synchronous tensioning device and tensioning method
The application discloses a pre-tensioning method bridge threaded steel grading step-by-step synchronous tensioning device and tensioning method. The device comprises a steel beam, a jack assembly, a support assembly, a large counterforce frame, an anchoring assembly, a hydraulic pump station, an inclination sensor and a control assembly. The jack assembly comprises an upper jack unit and a lower jack unit. The piston rod ends of the upper jack unit and the lower jack unit are connected with the large counterforce frame through universal ball head structures. The hydraulic pump station is connected with the upper jack unit and the lower jack unit respectively. The inclination sensor is arranged on the side surface of the large counterforce frame. The control assembly is electrically connected with the hydraulic pump station and the inclination sensor respectively. The application can adapt to the tensioning working condition of the differentiated reinforcement on the upper and lower beam bodies, realize the collaborative synchronous tensioning of the jacks with different tonnages, and has the advantages of uniform tensioning stress, high displacement control precision, simple structure, economy and reliability, effectively reduced beam body deformation risk and improved overall quality of the bridge prestress construction.
Owner:湖南联智智能科技有限公司
Displacement control method of walking closed system and engineering mechanical equipment
The invention discloses a displacement control method of a walking closed system and engineering mechanical equipment, the walking closed system comprises an engine, a closed pump, a front motor and a rear motor, the displacement control method comprises the following steps: S1, detecting a brake signal, and if the brake signal is detected, turning to S2; s2, the displacement of the closed pump is decreased at the initial change rate, and the displacement of the front motor and the displacement of the rear motor are increased at the initial change rate; s3, the vehicle state of the vehicle at the current moment is detected, and the vehicle state of the next moment is calculated and estimated; s4, inputting the pre-estimation result into a decoupling network for decoupling, adjusting the displacement change rate according to the relationship between the pre-estimated and calculated vehicle state at the next moment and a preset limit range, and outputting the adjusted displacement change rate; and S5, replacing the displacement change rate at the previous moment with the adjusted displacement change rate, and turning to the step S2. According to the method, the problems of brake side oil way pressure impact, driving side air suction and engine overspeed in the brake process of the hydraulic walking closed system are solved.
Owner:CHINA RAILWAY CONSTR HEAVY IND +1
Variable displacement water pump for engine and water pump displacement control method
The invention discloses a variable-displacement water pump for an engine and a water pump displacement control method, and relates to the technical field of water pumps, the variable-displacement water pump comprises a pump body, an impeller disc, an elastic part and a driving part, a pump shaft is rotationally connected to the center of the pump body, an impeller cover is fixedly connected to one end of the pump shaft, and a plurality of blades are arranged on the face, facing the pump body, of the impeller cover in the circumferential direction; the impeller disc sleeves the pump shaft, the impeller disc and the impeller cover are coaxially and oppositely arranged, the impeller disc can slide in the axial direction of the pump shaft, the impeller disc is provided with holes allowing the blades to penetrate through, the hole walls of the holes and the peripheral surfaces of the blades define liquid drainage intervals, the pump shaft is sleeved with the elastic piece, one end of the elastic piece abuts against the impeller disc, and the other end of the elastic piece abuts against the impeller disc. The driving part is arranged on the face, away from the impeller cover, of the impeller disc, the driving end of the driving part abuts against the impeller disc, and the acting force of the elastic part is opposite to that of the driving part. The size of the liquid drainage interval is adjusted through cooperation of the driving piece and the elastic piece, and variable displacement and oil consumption reduction are achieved.
Owner:DONGFENG MOTOR GRP
Miniature electric cylinder with positioning function and suitable for high temperature and low temperature
ActiveCN224264774UGuaranteed stabilityPrecisely control range of motionMechanical energy handlingStructural associationGear wheelDisplacement control
The utility model relates to the technical field of positioning electric cylinders, in particular to a miniature electric cylinder with a positioning function and suitable for high and low temperatures, which comprises a machine body, a speed reducer is mounted on the inner wall of a cavity, a driving gear is fixedly connected to the outer wall of the speed reducer, a driven gear is meshed with the outer wall of the driving gear, and a bearing is fixedly connected to the outer wall of the driven gear. The outer wall of the bearing is fixedly connected with a main shaft, the top end of the machine body is fixedly provided with a limiting switch, through the limiting switch at the top end of the machine body, the electric cylinder is provided with a positive limiting switch and a negative limiting switch, the movement range of the electric cylinder can be accurately controlled under the DC5V driving voltage, the rated thrust of the electric cylinder reaches 50N, and the thrust requirement in a common working scene can be met; the rated pushing speed of the electric cylinder is stable 4 mm / s, the stability of linear motion is ensured, the effective stroke is set to be 20 mm, displacement control is more accurate, in addition, the electric cylinder can bear radial force as high as 20 N, and therefore the structural stability and reliability in the running process are ensured.
Owner:DESHUO AUTOMATION TECH CHANGSHA CO LTD
Intelligent numerically controlled pressure system platform and method of use for reciprocating extrusion
This invention discloses an intelligent numerically controlled pressure system platform for reciprocating extrusion and a method for using the same. [Solution] The intelligent numerically controlled pressure system platform for reciprocating extrusion includes a mold clamp / temperature control system, a platform precision displacement control system, a base, a PC, and a temperature / displacement monitoring sensing control system. The PC is communicated to the mold clamp / temperature control system, the platform precision displacement control system, the mold control platform, and the temperature / displacement monitoring sensing control system. The mold control platform is provided with an auto-leveling system. The auto-leveling system is communicated to the platform precision displacement control system. According to the present invention, the operation of the pressure system can be precisely controlled, and the operating state and important parameters can be monitored online in real time, making it highly versatile.
Owner:XI AN JIAOTONG UNIV
Thermal shock test device and test method
The invention provides a thermal shock test device and a test method, and belongs to the technical field of aero-engine hot end component detection. The test device comprises a test rack body, a heating assembly, a displacement control assembly and a cooling assembly, the test rack body is provided with a placing space for the heating assembly, the displacement control assembly and the cooling assembly; the heating assembly is provided with a channel opening; the displacement control assembly is arranged on the test rack body and is used for moving a test piece into the heating assembly through the channel opening or moving the test piece out of the heating assembly; and the cooling assembly is arranged on the test rack body and is used for cooling the test piece pulled out of the heating assembly. The test device can be used for carrying out thermal shock test on a test piece.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
A force-position hybrid control method for robotic friction stir welding
The application discloses a kind of robot friction stir welding force-position hybrid control method, it is related to robot welding control technical field, comprising the following steps: step S10 establishes the hybrid strategy model based on constant displacement control and constant pressure control, the trajectory deviation caused by flexible deformation is compensated by robot dynamic offset function;The constant displacement control monitors welding depth in real time by laser sensor, the laser sensor is installed in 45° oblique direction to the outer wall of motorized spindle, and the collection point is located in the front side of the welding advancing direction, to avoid the interference of flash;The constant pressure control is collected axial upset force by six-dimensional force sensor, and force feedback type impedance control strategy is adopted.The robot friction stir welding force-position hybrid control method compensates the flexible deformation of robot by dynamic offset function, combined with the hybrid strategy of constant displacement and constant pressure control, solves the problem of uneven weld forming under single control mode.
Owner:BEIJING UNIV OF TECH
A test apparatus for a pneumatic control valve or actuator
ActiveCN224398972UReal-time detection of displacementMany test itemsMachine part testingVisual inspectionData transport
The utility model discloses a kind of test equipment for pneumatic control valve or actuator in the field of pneumatic actuator detection, including valve displacement measuring instrument and control cabinet;Control cabinet is delivered to pneumatic control valve or actuator and measures the pressure of compressed air, valve displacement measuring instrument measures the displacement of pneumatic control valve or actuator;The controller of control cabinet transmits pressure and displacement data to PC host computer by Ethernet, and PC host computer generates the detection report of pneumatic control valve or actuator.The utility model can improve the detection quality and efficiency of pneumatic actuator, improve the production efficiency of pneumatic actuator production enterprise, meet the increasing delivery requirement, solve the problem of low efficiency of factory inspection, stroke etc. rely on visual inspection, realize the digitization and intelligentization of production final inspection.
Owner:JIANGSU JUSHI DIGITAL TECH CO LTD
Axial displacement control type overrun clutch
The invention relates to the technical field of aero-engine starter systems, and discloses an axial displacement control type overrun clutch which comprises a clutch body, a damper and an output shaft, the clutch body comprises a deep groove ball bearing, an input shaft, a diaphragm spring set, a spline shaft, a fixing pin, a conversion lining, a ball bearing, a driving gear, a lock washer and a locking nut; the damper comprises a retainer, a damping block and a spring, the output shaft is supported on the starter shell through a deep groove ball bearing, the input end of the output shaft is provided with end teeth, and when the driving gear stretches out and is meshed with the end teeth, the transmission function is achieved. The output end of the output shaft is of an internal spline structure and serves as a torque output connector. By means of the torque-displacement conversion characteristic of the left-hand thread pair, accurate meshing and physical isolation disengaging of the input shaft and the output shaft are achieved. A three-stage transmission control structure is adopted and comprises a torque-displacement conversion module, a damping control module and a spiral meshing module, and the technical defects that a traditional inclined strut type clutch is polluted in lubricating oil, low in torque transmission efficiency and the like are overcome.
Owner:NANJING HANGJIAN AVIATION EQUIP TECH SVC CO LTD
Method and device for simulating buckling instability of vehicle outer cover
PendingCN122241872AGeometric CADDesign optimisation/simulationBuckling instabilityClassical mechanics
This application relates to the field of vehicle simulation technology, and particularly to a method and apparatus for simulating the compressive instability of vehicle exterior panels. The method includes: performing finite element modeling of the body-in-white to obtain a body-in-white model; dividing the exterior panel into multiple regions and assigning different thickness attributes to each region to obtain a target body-in-white model; applying constraints to the target body-in-white model to obtain a first target body-in-white model, and setting a pressure head on the exterior panel in the first target body-in-white model; establishing a surface-to-surface contact pair between the pressure head in the first target body-in-white model and the exterior panel to obtain a second target body-in-white model; and controlling the displacement of the pressure head based on the second target body-in-white model to perform compressive instability analysis on the exterior panel to generate compressive instability analysis results. This method can quickly and accurately assess the compressive instability of passenger vehicle exterior panels through preliminary simulation, reducing the risk of compressive instability on the sheet metal surface of passenger vehicle exterior panels.
Owner:CHINA FAW CO LTD
Distributed electric drive system and control method thereof
The invention relates to a distributed electric drive system and a control method thereof. The distributed electric drive system comprises a first output assembly; a second output assembly; the gear sleeve assembly comprises a meshing sleeve, a sliding sleeve and a gear sleeve spring; the executing mechanism is connected with the gear sleeve assembly; the first displacement detection assembly is configured to detect the linear displacement of the sliding sleeve and generate first displacement; the second displacement detection assembly is configured to detect the linear displacement of the meshing sleeve and generate second displacement; the controller is configured to control the executing mechanism to drive the gear sleeve assembly to move; and the controller is configured to control the first output assembly and / or the second output assembly to increase the output torque when the first displacement is greater than or equal to a first threshold value and the second displacement is greater than or equal to a second threshold value. According to the method, the accuracy of judging whether the power on the two sides is successfully coupled or not can be improved, the misjudgment phenomenon is avoided, the whole control process is quick in response, hysteresis does not exist, and then the probability that the vehicle gets out of trouble can be improved.
Owner:CHONGQING JINKANG POWER NEW ENERGY CO LTD
Compact shelf with adjustable height
Owner:JIANGXI YUANJIN SCI & TECH GRP CO LTD
Pull-off force and cord length testing device and testing method
The application provides a pull-off force and rope length testing device and a testing method. The pull-off force and rope length testing device comprises a testing table, a first clamp and a second clamp configured to clamp a first end and a second end of a rope to be tested respectively, the second clamp being movably arranged on the testing table, a force sensor fixed to the testing table, a detection end of the force sensor being connected with the first clamp, a displacement sensor and a driving assembly, both being arranged on the testing table and connected with the second clamp respectively, the driving assembly being configured to drive the second clamp to move relative to the first clamp so that the rope to be tested bears a preset pull-off force, and a control unit electrically connected with the force sensor, the displacement sensor and the driving assembly. The application can automatically and uniformly load and maintain pressure through the driving assembly, the force sensor and the displacement sensor can detect the pull-off force and the displacement in real time, the control unit can acquire the pull-off force and the displacement data in real time and control the driving assembly to start and stop, thereby realizing a closed loop, not relying on manual operation, small error and high testing precision.
Owner:ASTRIBOT CO LTD
Proximity type follow-up motor
The invention discloses a proximity type follow-up motor, which comprises a small motor (0), a large motor (1), a group of proximity type follow-up switches (10), a bracket shell (2) and other structural members, wherein the small motor (0), the large motor (1) and the group of proximity type follow-up switches (10) are mounted on the bracket shell (2). According to the principle, a proximity follow-up switch (10) of a proximity follow-up motor is started through position (angle) control, displacement control and the like of a small motor (0), so that position (angle) control of a large motor (1) is achieved through on-off of the switch, and the large motor (1) and the like are relatively high-power and large-torque moving parts. Therefore, the torque of the large motor (1) can be obtained at the control cost of the small motor (0). Wherein the core of the proximity follow-up switch (10) is composed of an induction sheet group (10. Jb) (contact sheet) on the output shaft of the small motor (0) and a proximity switch (vice versa) on the transmission shaft of the large motor (1).
Owner:李云忠
Box-dumping-based vehicle transportation control method and device and electronic equipment
ActiveCN120972938BVehicle position/course/altitude controlPosition/direction controlMarine engineeringDisplacement control
The application provides a box-dumping-based vehicle transportation control method and device and electronic equipment, and relates to the technical field of box-dumping control. A box body and a vehicle are connected through a 360-degree track, and the box body is provided with a box displacement control device. The method comprises the following steps: in response to a direction control operation on a driving direction control operation device, a direction control instruction corresponding to the direction control operation is transmitted to the box displacement control device; based on the direction control instruction, a specified vehicle body weight of the vehicle, and a front road condition image of the vehicle collected by an image collection device, an AI system is used to analyze and predict a to-be-traveled angle of the vehicle and a to-be-moved intensity of the vehicle; and the box displacement control device is used to control the movement and / or rotation of the box body on the track according to the to-be-traveled angle and the to-be-moved intensity, so as to offset the inertia intensity caused by the to-be-moved intensity and the to-be-traveled angle on the box body in advance through a second displacement of the box body relative to the vehicle.
Owner:ZHONGJIE TELECOMM
Experimental device and method for instability mechanism of tunnel face of weak surrounding rock tunnel
The invention discloses a weak surrounding rock tunnel face instability mechanism experiment device and method. A stratum environment simulation system is arranged above a model box system, and a tunnel excavation simulation system is installed in the model box system; in the stratum environment simulation system, a base of a hydraulic jack is fixedly arranged on a force transmission plate, a counter-force beam is fixedly arranged on the model box system, and a telescopic rod of the hydraulic jack is rotationally connected with the counter-force beam. According to the invention, a weak surrounding rock tunnel face instability mechanism reduced scale model test is carried out, a hydraulic jack is used for applying a load acting on a force transmission plate, the force transmission plate is used for transmitting the load to a position above a stratum so as to simulate surrounding rock overlying loads at different burial depths, and gradual unloading is carried out through a displacement control method so as to realize tunnel face instability failure whole process simulation. The stratum deformation evolution rule and the geometrical characteristics of a plastic instability area in the tunnel instability state are researched, and the method can be used for simulating the stability and instability characteristics of tunnel faces with different section forms, excavation forms and using functions.
Owner:ANHUI UNIV OF SCI & TECH
A continuous operation automatic doffing trolley and a doffing control method
The application provides a continuous operation automatic doffing trolley and a doffing control method. The trolley comprises a work main body, a pipe grabbing device, a displacement control device, a storage device, a continuous doffing device and a driving device. The target object is sequentially controlled to enter the storage device by the continuous doffing device. The driving device comprises a first driving assembly and a second driving assembly. The first driving assembly controls the directional movement of the conveying assembly to realize the discharging of the target object. The second driving assembly controls the relative positions of the two conveying assemblies and the upper part of different storage areas. The application can realize the continuous and orderly discharging of the yarn pipes, separate and store the yarn pipes during the doffing process, improve the doffing efficiency and ensure the stability of the yarn pipes.
Owner:TONGLING JING TE MACHINERT
Combined throttling device and ammonia water absorption type refrigerating system
ActiveCN223985405UMechanical apparatusClimate change adaptationElectric machineryDisplacement control
The utility model discloses a combined throttling device and ammonia water absorption refrigeration system, wherein the combined throttling device comprises a stepping motor, a needle valve, a controller and a limit switch, the needle valve is used as a throttling element, and the stepping motor comprises an output shaft used for outputting linear displacement; the output shaft is connected with a valve needle of the needle valve and converts output displacement into linear displacement of the valve needle, the controller is used for controlling the displacement of the output shaft so as to adjust the opening degree of the needle valve, the limiting switch is connected with the controller, and when the needle valve reaches the minimum opening degree and / or the maximum opening degree, the limiting switch is triggered to send an electric signal to the controller. According to the combined throttling device, the valve needle of the needle valve is driven to axially move through accurate displacement output of the stepping motor, accurate adjustment of the sectional area of a fluid channel can be achieved, and therefore the high-accuracy control requirement of a system for refrigerant flow is met.
Owner:ZHONGNENG LVKE (SHANGHAI) TECH CO LTD +1
Control mechanism of sliding massager
The utility model discloses a control mechanism of a sliding massager, which relates to the field of massagers and comprises a frame body, a sliding rail arranged in the frame body, a sliding block arranged on the sliding rail and a connecting block fixed on the sliding block, the connecting block penetrates through a through groove arranged on the frame body and is fixedly provided with a massaging part, and the massaging part is fixed on the frame body. The massage head is assembled with the massage part; the belt displacement control mechanism is arranged in the frame body; the driving wheel and the driven wheel are arranged on the left side and the right side of the frame body, the transmission belt is in meshing transmission with the driving wheel and the driven wheel, and the transmission belt located below the sliding block penetrates through the sliding block, is fixedly connected with the sliding block and is used for driving the driving wheel to operate. The stroke and the speed of the massage part where the sliding block is located are controlled through the servo motor, so that various massage modes can be switched, and different parts of the body can be massaged to different degrees.
Owner:东莞市飞牛精密模具有限公司
A new mechanical support lifter
The utility model relates to lifting device technical field discloses a novel mechanical type support lifting device, including support rod, one end of support rod is fixedly connected with bottom shell, the one end of bottom shell is provided with top shell, the inner wall rotation of bottom shell is connected with first bevel gear, one end of first bevel gear is fixedly connected with fixed ring, the outer wall one end of bottom shell is penetrated and is connected with second bevel gear rotation, and second bevel gear and top shell are penetrated and are connected rotation, second bevel gear and first bevel gear meshed connection, one end of fixed ring is fixedly connected with limit cylinder, and limit cylinder and top shell rotation are connected. In the utility model, through the linkage between first bevel gear, fixed ring, second bevel gear and screw rod can make screw rod displacement control accurate, and the lifting process has no lag or drift, ensures long -term support stability, and can bear heavy load and need not extra energy consumption to keep position.
Owner:WENZHOU XINTUO FIRE FIGHTING EQUIP CO LTD
Positive cycle nonlinear displacement control method for strong drilling of sulfur-containing and gas-containing stratum
The invention discloses a positive cycle non-linear displacement control method for strong drilling of a sulfur-containing and gas-containing stratum, which belongs to the technical field of displacement control methods and comprises the following steps of: measuring the static liquid level height of a drilling fluid column before a drilling pump is started under the condition of leakage return of a drilled well; measuring the working fluid level height after well drilling pump starting is stable; calculating the liquid column pressure before pump starting according to the static liquid level height of the drilling liquid column; calculating formation pressure after pump starting is stabilized according to the working fluid level height; comparing whether the liquid column pressure before pump starting and the formation pressure after pump starting stabilization are balanced or not; if not, the annulus dynamic liquid level height is adjusted, the annulus liquid column pressure is kept equal to or larger than the formation pressure all the time, and the annulus liquid column pressure is made to stably press the leakage layer; and after the leakage layer is stably pressed, clear water with different discharge capacities is adopted to bring drilled rock debris into the leakage layer under different annular gaps of the drill collar section and the drill rod section. In the process of clear water forced drilling, the height of the annular liquid level above a leakage layer is controlled through positive circulation, so that the annular liquid column pressure is larger than the formation pressure, and an air layer is stably pressed to prevent overflow.
Owner:CHINA NAT PETROLEUM CORP +1
Damping steel tensile test method
PendingCN121830333AMaterial strength using tensile/compressive forcesMaterial strength using repeated/pulsating forcesOriginal dataMetallic materials
The invention provides a damping steel tensile test method, which relates to the technical field of metal material performance detection, and comprises the following steps: a testing machine adopts automatic program control, the initial tensile speed is set to be 1-5mm / min, a displacement control mode is adopted, hysteresis loop method cyclic tensile is performed for the first time, the target strain point of a first extensometer is set to be 1%, and the target strain point of a second extensometer is set to be 1%; the lower reverse point of the lag loop is 5-10 MPa, and the load holding time is 10-20 s; the strain is accumulated in sequence, the target strain point of the extensometer in each cyclic stretching is increased by 1%, the stress is unloaded to 5-10 MPa after the target strain point is reached each time, and loading is carried out again after the load is kept for 10-20 s until the sample is fractured; extracting stress-strain original data of each time of cyclic stretching, and performing data superposition on the original data extracted each time to form a stress-strain curve of cyclic stretching; and according to the stress-strain curve, analyzing the mechanical property and damping property change of the damping steel under cyclic loading.
Owner:ANGANG STEEL CO LTD
Embedded part positioning, mounting and adjusting equipment for constructional engineering
PendingCN121992950AEasy to installachieve balance adjustmentBuilding material handlingControl engineeringDisplacement control
The invention discloses embedded part positioning, mounting and adjusting equipment for constructional engineering, and relates to the technical field of embedded part mounting. The device comprises a displacement regulation and control assembly, a balance adjustment mechanism is fixedly installed on the lower surface of the displacement regulation and control assembly, the balance adjustment mechanism comprises two symmetrically-arranged balance assemblies, the balance assemblies are fixedly connected with the displacement regulation and control assembly, and a limiting supporting assembly capable of moving up and down is arranged between the two balance assemblies. The displacement regulation and control assembly is used for controlling the limiting supporting assembly to move up and down and horizontally move front and back and left and right, the balance regulation mechanism is used for regulating the displacement regulation and control assembly and the limiting supporting assembly to be in the horizontal state, then the limiting supporting assembly is used for limiting the positions of the embedded parts of different specifications, and the embedded parts are kept stable in the installation process; the embedded parts of different specifications can be positioned and installed in different ground environments, the positions of the embedded parts can be flexibly adjusted, the embedded parts are aligned with the installation positions, and accurate installation and positioning are achieved.
Owner:SHANDONG DAYUAN ZHANSHUO CONSTRUCTION GROUP CO LTD
Variable-speed running mechanism matched with load
The utility model discloses a variable-speed running mechanism matched with load, which relates to the technical field of parking equipment and comprises a control device, a load detection device and a variable-speed driving device, the load detection device and the variable-speed driving device are electrically connected with the control device, and the load detection device is used for detecting the load state of a traction chain / cable. The variable-speed driving device is used for driving the traction end of the traction chain / cable to displace at a reasonable speed, the control device can control the variable-speed driving device to adjust the speed according to a load state signal detected by the load detection device, and the load detection device controls the variable-speed driving device to adjust the speed when detecting a no-load signal or an overweight signal in the displacement process of the traction chain / cable. And the control device controls the variable-speed driving device to stop running and sends out an alarm signal. The utility model has the advantages of low cost and high efficiency, and can avoid the risk of overweight load.
Owner:GUANGDONG SHICHEN TECHNOLOGY CO LTD
Friction rivet welding method
The invention relates to the technical field of welding processes, and discloses a friction rivet welding method which is used for friction rivet welding connection of an upper plate and a lower plate and comprises a pre-pressing stage, an upper plate penetrating stage, a friction cleaning stage, a friction welding stage and an upsetting stage, and the friction rivet welding method is controlled based on feeding displacement of a friction welding unit piece. In the displacement control driving mode, the total shortening amount of the friction welding element can be accurately controlled, and therefore the protruding height of the rivet of the connecting joint has high consistency.
Owner:SHANGHAI ZHIRONG IND EQUIP CO LTD
Marine electric fracturing skid control system and control method thereof
PendingCN121593748APositive displacement pump componentsFluid removalDisplacement controlOffshore oil and gas
The invention relates to the technical field of offshore oil and gas field electric fracturing equipment control, and discloses a marine electric fracturing skid control system which comprises a main controller. The main controller is connected with a man-machine interaction interface, a motor control module, an alarm module, a maintenance module, a signal calibration module, a pressure monitoring module, a fluid end lubrication control module, a displacement control module, a heater control module, a suction valve control module and a sound-light alarm module. The invention further discloses a control method of the marine electric fracturing skid control system. According to the marine electric fracturing sledge control system and the control method thereof, comprehensive, intelligent and efficient control over the marine electric fracturing sledge is achieved, the operation safety, reliability and efficiency are improved, the equipment damage risk and the operation difficulty are reduced, and the marine electric fracturing sledge control system and the control method are particularly suitable for fracturing operation in the complex offshore environment.
Owner:SJS LTD