61878 results about "Hydraulic pressure" patented technology

The invention discloses a wind turbine generator hoisting construction tower drum operation system and a construction method thereof, and relates to the technical field of intelligent control. The problems that in the prior art, a static tension balance mechanism cannot restrain bending moment abrupt change, steel-concrete interface stress concentration causes microcrack propagation, the wave dynamic load compensation capacity is insufficient, and dynamic rigidity attenuation early warning is lacked are solved. Comprising a dynamic load prediction module, a multi-mode vibration suppression module, an offset compensation module and a digital twinborn decision module, a hoisting load is solved in real time through a multi-physics field coupling model and an improved time sequence deep learning algorithm, and interface crack propagation is suppressed in combination with traveling wave offset control and sweep frequency vibration. An improved Morison equation is adopted to drive a two-stage hydraulic servo to compensate a wave dynamic load, and a digital twin closed-loop correction mechanism is constructed based on a 5G URLLC protocol; the tower drum hoisting precision, the structural safety and the operation reliability under the complex working condition are remarkably improved.

The invention discloses a hydraulic pressure test tube machine and a tube body clamping centering device, in the tube body clamping centering device, two guide rods and a telescopic oil cylinder are arranged on a base side by side; corresponding ends of the two guide rods are respectively provided with a first sliding block, corresponding other ends of the two guide rods are respectively provided with a second sliding block; a fixed end of the telescopic oil cylinder is fixed on one end of the base, the fixed end of the telescopic oil cylinder is arranged corresponding to the second sliding blocks; a telescopic end of the telescopic oil cylinder is connected with the first sliding blocks, and is used for driving the first sliding blocks to slide along the guide rods, one of two clamping blocks is fixed on the two first sliding block, and the other one of the two clamping blocks is fixed on the two second sliding blocks; the first sliding block on one of the two guide rods is provided with a first rack, the second sliding block on the other one of the two guide rods is provided with a second rack, both sides of a linkage gear are respectively meshed with the two racks, the first sliding blocks and the second sliding blocks are adjusted by the telescopic oil cylinder to move towards each other or depart from each other. The scheme can solve the problems of high control precision and slow regulation efficiency of a plurality of oil cylinders of the tube body clamping centering device.

The invention discloses a hydraulic motor fault diagnosis method and system based on heterogeneous asynchronous data fusion, and the method comprises the steps: collecting heterogeneous asynchronous data of a sensor network, carrying out the preprocessing of the data, inputting the data into a parallel dynamic pruning residual network, extracting features, and carrying out the preliminary fusion, thereby obtaining an initial feature plane; and inputting the initial feature plane into a multi-connection neural network, fusing data, extracting features, obtaining a final feature plane, using the fused feature data as a training set, and building a feature classification model to test and evaluate the performance of the feature classification model. According to the method, the limitation of a traditional fusion model in asynchronous processing of high-frequency vibration signals and low-frequency thermodynamic data of a hydraulic system is effectively overcome, the robustness of key fault features in a strong noise environment is remarkably improved, and rapid virtual-real mapping of bench test simulation data and online monitoring data is realized; typical faults such as plunger pair abrasion and valve plate cavitation of the hydraulic motor can be accurately supported, and safety guarantee is provided for equipment life prediction and safety control.

The present invention relates to a coal mine intelligent directional drill and its drilling method, belonging to the technical field of coal mine drills. It comprises a moving platform, machine frame, clamper, main manipulator, power head, drill pipe storage system, control system, and hydraulic system. The power head structure is improved by adding an angle adjuster with accurate angle adjustment, locking, and anti-rotation functions. The angle adjuster is positioned on the gearbox side opposite the main motor, connected via a driving shaft. The control system includes a toolface azimuth detection and initialization system that works with the angle adjuster. This solves prior issues such as the absence of specialized toolface azimuth adjustment devices, low precision, low track adjustment efficiency, and challenges in achieving automatic directional drilling in the prior art. The invention enhances precision and efficiency, enabling automated, intelligent directional drilling.

The invention provides an injection molding machine mold opening and closing parameter optimization method and system oriented to energy conservation and efficiency improvement, and relates to the technical field of industrial process intelligent control. The method comprises the steps that mold temperature, hydraulic pressure and vibration signals are collected in real time through a multi-source sensor, and a composite optimization target of a dynamic energy consumption coefficient and a process stability index is constructed; an improved multi-target genetic algorithm is adopted to iteratively generate a candidate parameter set meeting energy consumption and stability constraints, and the algorithm fuses hydraulic system safety boundary dynamic constraints and an adaptive variation strategy; a parameter adjustment effect is rehearsed through a digital twin model, and motion track deviation is calibrated online in combination with a recursive least square method, so that parameter dynamic injection is realized; and triggering abnormal working condition recovery and material self-adaptive optimization based on a closed-loop feedback mechanism. The system comprises a multi-source data acquisition module, a composite optimization calculation module, a dynamic parameter injection module and a closed-loop feedback control module, and the real-time performance and generalization ability are improved through an FPGA hardware acceleration optimization engine and a transfer learning algorithm.

The invention discloses a novel textile fabric tensile strength detection device, and relates to the technical field of cloth detection equipment. The device comprises a base, a pressing block is arranged at the top of the base, push plates are arranged on the two sides of the pressing block, and first pressure sensors are installed in the push plates; an adjusting assembly is arranged on the top of the base. A rotating shaft, a gear and a toothed plate of the adjusting assembly are matched with a hydraulic rod and a clamping plate of the clamping assembly, accurate clamping and fan-shaped stretching of the side edge of cloth are achieved, and the defect that a traditional device can only conduct horizontal tension detection is overcome; an adjusting plate, an adjusting groove and a moving shaft of the linkage assembly are driven by a screw rod and a moving sleeve of the driving assembly, so that the cloth generates fan-shaped deformation under the action of lateral tension, the tensile strength of the side edge of the cloth can be evaluated more comprehensively in combination with dual monitoring of a first pressure sensor and a second pressure sensor, the accuracy of detection data is remarkably improved, and the detection efficiency is improved. The device is especially suitable for testing high-strength fabrics with easy-to-tear side edges.

The present invention belongs to the technical field of anchor protection apparatuses. Provided is an automatic anchor protection platform having combined support of anchor rods and anchor cables. The automatic anchor protection platform comprises a movable chassis, a multi-cycle anchor rod drilling rig, an anchor rod drilling rig posture positioning control device, an anchor cable support device, a temporary support device, an electrical system and a hydraulic system. Said automatic anchor protection platform integrates the multi-circle anchor rod drilling rig, the anchor cable support device and the temporary support device, and therefore meets the anchoring and support requirements of roadways under different geological conditions, allows anchor rod and anchor cable parallel support operations to be conducted at the same time, and achieves efficient coordinating matching linkage integrated design, thus further promoting efficient operation processes in limited spaces such as coal mines and tunnels.

The invention relates to the technical field of cutter suction dredger steel pile trolley control, and discloses a cutter suction dredger steel pile trolley control method and system based on hydraulic excitation early warning, and the method comprises the steps: collecting the influence degree of multiple parameters on the system stability, calculating a pressure fluctuation factor and the like to form a state feature set; constructing a dynamic pressure balance model, inputting data such as a pressure time sequence queue and a sea condition level, and outputting a dynamic pressure adjustment value; constructing a cooperative control correction model, inputting steel pile attitude data and outputting a cooperative correction coefficient; and calculating a final control output quantity by combining the adjustment value and the correction coefficient, and generating a hydraulic excitation control instruction set. The system comprises a multi-source sensor module, a state feature calculation module, a dynamic pressure balancing module and the like, and multi-dimensional data fusion and intelligent control are achieved. The stability, the control precision and the environmental adaptability of the steel pile trolley system are improved, and the method is suitable for the control scene of the cutter suction dredger steel pile trolley.

The invention discloses a cable-stayed and buckled multi-cable synchronous regulation and control method and system based on hydraulic cooperation, and the method comprises the steps: obtaining the information of each cable, configuring a hydraulic device for each cable, grading and dividing the tensioning operation of the hydraulic devices into a plurality of tensioning levels, distributing a sub-target tensioning force for each tensioning level, the hydraulic device is controlled to stretch each inhaul cable from the first stretch-draw level according to the number of the inhaul cable and the initial stretch-draw force of the inhaul cable until the sub-target stretch-draw force corresponding to the current stretch-draw level is reached, the next stretch-draw level is entered, and the current stretch-draw force of each inhaul cable is monitored in real time; comparing the pressure difference approaching variable with a pressure difference approaching variable threshold value, and finely adjusting the corresponding inhaul cable according to a comparison result; the method comprises the following steps: generating a plurality of tension proximity diagrams according to the real-time monitored current tension force of each inhaul cable, searching for the inhaul cable with tension kick according to node conditions in the tension proximity diagrams, and sending out alarm information.

The invention discloses a continuous rigid frame bridge construction monitoring method which comprises the following steps: before cantilever casting construction, arranging linear monitoring points along the longitudinal axis direction of a bridge according to the spacing of 8-12 meters, and respectively arranging stress monitoring points on a top plate and a bottom plate of the root section of each section; synchronously acquiring three-dimensional coordinate data of the linear monitoring points and real-time strain data of the stress monitoring points in the process of pouring each section in a cantilever manner; the collected linear data and stress data are input into a finite element model for collaborative analysis, and when a linear deviation value exceeds + / -5% of a designed pre-camber value and the deviation between a stress measured value and a theoretical calculation value exceeds + / -8%, an adjustment instruction is automatically generated; according to the adjusting instruction, the elevation of the front fulcrum of the hanging basket is adjusted through the hydraulic jack during construction of the next section; after initial setting of the adjusted segment concrete, linear data and stress data are collected, and the actually measured data and a finite element model prediction value are compared and verified. The method can help to guarantee the safety and durability of the continuous rigid frame bridge.

The invention relates to the technical field of earthwork compaction, and discloses a pipe ditch backfilling and tamping system based on excavator modification. The system comprises an earthwork condition dynamic sensing module which captures a bucket tooth track, a hydraulic oil cylinder pressure pulse and a soil mass vibration spectrum in real time and combines a historical database to construct a model to output a theoretical compaction degree curve; a multi-source compaction difference analysis module performs three-dimensional deviation detection on the theoretical curve and the actual settlement volume data to generate a construction grid-level compaction difference tensor; the defect area association mapping module inputs the tensor into a geological topology analysis network, generates a loose defect propagation path probability cloud chart by combining soil parameters and identifies weak sections; and the tamping strategy self-adaptive configuration module automatically sets operation parameters according to the cloud picture, activates high-precision monitoring on a high-probability defect section, and applies a dynamic excitation force test on adjacent grids, so that intelligent management and control of the backfilling and compacting process are realized.

A hydraulic damper comprises a main tube, a piston assembly, a base valve assembly, and a compression stop assembly. The compression stop assembly includes an insert defining an inner chamber, and a sleeve displaceable along with the main piston assembly and configured to be slidably introduced inside the inner chamber. The sleeve has a diameter lower than the diameter of the main tube defining a first external flow channel between the sleeve and the main tube; the sleeve is attached to the piston assembly by a spring disposed within the sleeve; and the insert is provided with a plurality of axially-spaced holes and has an annular flange adjoining the inner wall of the main tube and separating the compression chamber from a second external flow channel between the radially external outlets of the holes and the base valve assembly.

The invention discloses a hydraulic control system, which belongs to the field of hydraulic control, and comprises a power execution module, a control regulation module and a sensing feedback module, in the slurry manufacturing stage, data are collected through a sensor, the abnormal condition of the slurry temperature is detected to judge whether the slurry temperature is adjusted or not, and based on the real-time slurry viscosity, the rotating speed of a stirring shaft is adjusted in a self-adaptive mode by adjusting the hydraulic flow of a hydraulic motor of a stirring driver; acquiring driver data to monitor a control instruction implementation result, performing abnormality evaluation analysis on a driver through threshold judgment and abnormality score calculation, and generating an updated driver control signal after a driver instruction regeneration signal is received; monitoring abnormal conditions of data acquired by various deployed sensors, monitoring abnormal data of the sensors, and monitoring duration of the abnormal data so as to carry out abnormal early warning and generate abnormal early warning information; the problem that the slurry temperature of die-casting equipment under hydraulic control is difficult to adaptively adjust and disturb is solved.

The invention belongs to the technical field of hydraulic supports, and particularly relates to a hydraulic support which comprises a hydraulic support body and a protection assembly arranged on the hydraulic support body and further comprises an angle compensation mechanism and a gangue cleaning mechanism, the angle compensation mechanism is arranged on the hydraulic support body, and the gangue cleaning mechanism is arranged on the hydraulic support body. The angle compensation mechanism comprises an angle adjusting assembly, a dynamic telescopic assembly and a movable base assembly, the angle adjusting assembly is arranged on the angle compensation mechanism, the dynamic telescopic assembly is arranged on the angle compensation mechanism, and the movable base assembly is arranged on the angle compensation mechanism; according to the angle compensation mechanism, multi-degree-of-freedom attachment of the adjusting plate on the top of the roadway is achieved, and the angle compensation mechanism effectively adapts to the complex geological conditions of roadway inclination or top plate local sinking.

The invention relates to the technical field of motor control, and discloses a permanent magnet synchronous motor control system and method for an electric drive hydraulic source, and the system comprises a data collection module which is used for collecting the state parameters of the electric drive hydraulic source and the operation data of a permanent magnet synchronous motor in real time through multiple sensors; the sensor redundancy and fault-tolerant module is used for performing parallel sampling through hardware dual-redundancy configuration and dual sensors; the self-adaptive fuzzy logic control module is used for dynamically adjusting a rotating speed instruction and a torque instruction of the permanent magnet synchronous motor based on the collected state parameters; a data driving optimization module; and a digital twinning prediction maintenance module. A self-adaptive fuzzy logic control module is used for dynamically generating a motor rotating speed and torque instruction based on parameters such as real-time pressure, flow deviation and change rate, a fuzzy logic algorithm is used for processing a nonlinear time-varying load and quick response, a self-adaptive fuzzy logic control rule weight and a power conversion circuit parameter are optimized through a reinforcement learning algorithm, and the control precision is improved. And dynamic self-optimization of permanent magnet synchronous motor control is realized.

The invention discloses an equipment health state dynamic prediction method fusing digital twinning and multi-scale evaluation, and relates to the technical field of equipment health prediction of an active launching platform, and the method comprises the steps: laying multiple types of sensors on a mechanical structure layer, a hydraulic execution layer, an electric control layer and an environmental action layer of the active launching platform; multi-source operation data such as stress strain, pressure torque, temperature power and environment load are collected in real time, and a standardized input parameter set is formed; and constructing a multi-layer digital twinborn model, forming a multi-scale twinborn mapping matrix, calculating a healthy coupling evolution coefficient, and evaluating the stability of the multi-layer collaborative structure of the platform. Calculating a multi-scale stability coefficient, and updating the multi-scale twin mapping matrix; and calculating a dynamic prediction driving index to realize prediction reliability judgment and digital twin model self-learning updating. And a health prediction closed loop of digital twinning and physical equipment is realized.

The invention discloses horizontal internal thread tapping equipment, which relates to the technical field of tapping equipment and comprises a main body, a hydraulic mechanism, a clamping, lifting and overturning mechanism, a tapping mechanism, a liquid supply mechanism and a cooling and lubricating mechanism. Through workpiece overturning and tapping direction optimization, the problem of scrap accumulation in traditional tapping is thoroughly solved, when a hydraulic mechanism is used for driving a clamping, lifting and overturning mechanism to descend, an overturning gear is meshed with a toothed plate to drive a workpiece to overturn by 180 degrees, the bottom-to-top tapping action of a screw tap is matched, scraps naturally fall by means of the gravity effect, and the tapping efficiency is improved. Meanwhile, chippings are further scoured through precise spraying of the cooling lubricating liquid, the chippings are prevented from being retained on the surface of the threaded hole or the screw tap, by means of the design, the additional friction resistance of the chippings to the screw tap is reduced, the abrasion and fracture risks of the screw tap are reduced (the service life is prolonged by 30% or above), the problems of thread disorder, size out-of-tolerance and the like caused by chipping extrusion are solved, and the service life of the screw tap is prolonged. The thread machining precision and the surface quality are remarkably improved, and the workpiece rejection rate is reduced.

The invention belongs to the technical field of geological exploration, particularly relates to a high-adaptability multi-type geological exploration sampling device and an accurate sampling method.The high-adaptability multi-type geological exploration sampling device and the accurate sampling method aim to solve the problems that a drill bit is stuck and stratified sampling is difficult, and the high-adaptability multi-type geological exploration sampling device comprises a base, a vertical plate, a lifting plate and a driving cylinder with the drill bit; a first annular groove is formed in the outer wall of the driving cylinder and matched with the first circular ring, downward-pressing drilling and upward-lifting resetting of the drill bit are achieved, a second annular groove is formed in the drill bit, and the flow direction of hydraulic oil is controlled through a second circular ring connected with a fixing rod; during lifting, hydraulic oil is injected into the second hydraulic channel, the trapezoidal collecting box extends out to scrape hole wall samples, the electromagnet and the iron block are matched to adjust the position of the second circular ring, the working states of the teeth and the collecting box are switched, drill bit jamming is reduced, hole wall sampling at any depth is supported, and exploration efficiency is improved.

The invention discloses a multi-cylinder hydraulic equipment data interaction system based on digital twin drive, and relates to the technical field of industrial automation control. The problems that in the prior art, data acquisition and processing lack flexibility and pertinence, model construction and optimization are not perfect enough, and simulation optimization and real-time feedback are lacked are solved. Accurate perception and fault early warning of the equipment state are realized by optimizing the sensor layout and adjusting the acquisition frequency, the physical structure and the working principle of the equipment are accurately described by adopting a digital twin model, and the current and future running states of the equipment are scientifically evaluated and effectively predicted in combination with an evaluation index system of a state analysis unit. A basis is provided for advanced maintenance, the equipment fault risk is reduced, a digital twin model is used for simulating the implementation effect of a control strategy, a control instruction is optimized according to simulation evaluation, the execution effect is monitored in real time for dynamic adjustment, accurate control over equipment is ensured, the stability and reliability of equipment operation are improved, and the production efficiency is improved.

The invention discloses a radial forging machine chuck rotation oscillation braking electro-hydraulic control system and method, and the control system comprises a position detection encoder installed on a hammer head of a forging main machine, a hydraulic servo motion controller, a high-frequency servo valve, an oscillation braking oil cylinder with the same area as an A cavity and a B cavity, and an oscillation braking device with a worm gear and a worm. The pressure sensor and the displacement sensor are integrated on the oil cylinder to form a closed-loop control loop; the control method comprises the following steps: activating an oscillation braking function and collecting hammer phase, oil cylinder pressure and displacement signals in real time; a sine control signal synchronous with the forging frequency is generated based on the brake phase of 270-360 degrees; a brake oil cylinder is driven to push the worm to axially move, and the rotating speed of the chuck is modulated through the helix angle characteristic; and the amplitude is dynamically adjusted through a displacement-pressure feedback signal, and 25MPa overrun protection is executed. The purposes of reducing the brake response delay rate, the forge piece distortion rate and the equipment impact load are achieved, and 90-620 times / min wide-frequency-domain forging is supported.

The invention discloses a modularized intelligent tubular column conveying system based on digital twinning and self-adaptive control, and belongs to the technical field of digital twinning. The modularized intelligent tubular column conveying system is characterized in that a digital twinning model integrating a mechanical structure, electrical control and hydraulic power attributes is constructed; acquiring multi-source sensing data including an image sequence, a three-dimensional point cloud and vibration acceleration in real time, driving the digital twin model to perform synchronous simulation, and calculating a deviation value between the digital twin model and internal simulation data; on the basis of the deviation value, a control logic parameter adjusting instruction is generated through a predefined mapping rule, then updated control logic parameters are executed, and a complete pipe column conveying process is simulated to generate a predictive system state sequence; and finally, the safety-related state subsets are issued to a field controller to guide and execute preventive actions. According to the invention, deep fusion and closed-loop control of digital twinning and physical entities are realized, and the debugging efficiency, the environmental adaptability and the operation safety of a tubular column conveying system are effectively improved.

Heat exchangers for cryogenic fuel distribution systems and related methods are disclosed herein. An example aircraft disclosed herein includes a cryogenic fuel system including a cryogenic fuel, a hydraulic system including a hydraulic fluid, a gas turbine engine fluidly coupled to the cryogenic fuel system, and a heat exchanger fluidly coupled to the cryogenic fuel system, the heat exchanger is used to exchange heat between the cryogenic fuel and at least one of (1) hydraulic fluid or (2) working fluid thermally coupled to the hydraulic system.

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

The invention belongs to the technical field of ship bearings, and particularly relates to a ship bearing radial loading test bench and method for simulating ice load and water immersion working conditions, and the method comprises the steps: installing a to-be-tested intermediate bearing on a test platform, enabling the intermediate bearing to sleeve a test shaft, starting a cooling water circulation system to control the flow, cooling water enters a cooling water coil pipe to establish oil pool cooling circulation; a driving motor is started; a test shaft stably operates through equipment such as a reduction gearbox and the like; a dynamic pressure lubrication state is established, a radial dynamic load or a stable constant load is applied through a hydraulic loading system to simulate an icebreaking load working condition, and a simulated water body is injected into a water tank; the test conditions of the intermediate bearing in a ship immersion environment are constructed through water pressure adjustment, the temperatures of lubricating oil, a bearing bush and cooling water are monitored in real time, the loading force is adjusted through feedback data, and the performance of the intermediate bearing is judged after the test is finished. The problems that ice excitation and soaking environment simulation are insufficient and a loading structure is eccentric in the prior art are solved, and high-precision cooling and thermal stability evaluation are achieved.

The invention provides an oil seal press-fitting abnormity real-time detection method based on pressure displacement curve analysis, and relates to the technical field of oil seal assembly control. Pressure displacement data acquisition is executed and a real-time pressure displacement curve is fitted when press-fitting equipment is started; based on displacement progress threshold triggering stage switching of the time sequence displacement data, an association stage characteristic curve is called from the oil seal press-fitting reference template; comparing the characteristic curve in the association stage with the real-time pressure displacement curve to solve a real-time curve deviation vector; and according to the real-time curve deviation vector mapping physical failure abnormal mode, self-adaptive adjustment of oil seal press-fitting process parameters is triggered. The technical problems that in the prior art, a continuous press-fitting process is adopted for oil seal assembly, rubber stress concentration is caused, hydraulic locking is formed due to lubricant retention, and the press-fitting depth is out of control are solved. Physical failure prevention in the oil seal assembly process is achieved, it is guaranteed that the press-fitting depth meets the technological specification tolerance in the whole process, oil seal assembly defects are restrained, and the sealing reliability of an engine is improved.

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

The invention relates to a buoyancy tank wharf real-time assembly quality control method, and belongs to the technical field of port engineering automatic construction. According to the method, aiming at the problems of large geometric positioning deviation, uneven contact surface stress and difficulty in real-time control of attitude instability in buoyancy tank assembly, laser range finders are mounted at four corners of a buoyancy tank through a geometric positioning layer to monitor horizontal deviation, and pressure sensors are arranged on a butt joint surface through a mechanical sensing layer to generate a pre-tightening force curve; the attitude monitoring layer adopts a bottom inclination angle sensor to detect inclination; according to the horizontal deviation, the curve similarity deviation and the inclination angle deviation, the real-time management and control platform triggers a hydraulic adjusting mechanism, a torque wrench and a balance weight drive to conduct adjustment; meanwhile, data are stored through a buoyancy tank number, a timestamp and a sensor type three-dimensional index, and a rechecking instruction is generated based on the difference between the current adjusting quantity and the first three mean values. According to the invention, real-time control and dynamic adjustment of the assembly process are realized, and the modular assembly precision and safety of the floating wharf are improved.

The invention discloses a prefabricated wallboard assembly structure and an assembly method thereof, and relates to the technical field of building prefabricated wallboards, the prefabricated wallboard assembly structure comprises a first wallboard and a second wallboard, a plurality of inserting grooves are formed in one side of the first wallboard, and hydraulic expansion splicing mechanisms are symmetrically mounted in the inserting grooves up and down; the hydraulic expansion splicing mechanism is composed of a metal sleeve, meshing teeth, a sealing rubber ring, a piston and an oil injection mechanism, the metal sleeve and the inserting groove are welded and fixed, an oil cavity is formed in the metal sleeve, multiple sets of mounting grooves are formed in one end of the metal sleeve, four annularly-distributed sliding grooves are formed in the outer sides of the mounting grooves, and the sliding grooves are communicated with the oil cavity. A plurality of inserting blocks are arranged on one side of the second wallboard, connecting holes are formed in the inserting blocks in an up-down symmetrical mode, a plurality of meshing grooves are formed in the inner ends of the connecting holes, and the problem that most existing prefabricated wallboards are connected through bolts, stress concentration is prone to occurring, and consequently the structural stability is reduced is solved.

The invention discloses a multi-joint robot system fault diagnosis method based on hydraulic drive, belongs to the technical field of multi-joint robot fault diagnosis, and aims to solve the problems that single parameter judgment is prone to misjudgment, associated part abnormity traceability is difficult, and complex environments and multi-stage operation are difficult to adapt. The method comprises the following steps: dividing operation stages, identifying key parts, collecting operation and environment parameters, and storing and establishing a dynamic association library according to an association mode; environment intervals are divided, a model containing a single parameter and a collaborative benchmark is constructed by combining the operation stage and the environment intervals, and the model is matched through environment abnormity diagnosis; comparing a current parameter with the model, diagnosing and positioning an abnormal part, and analyzing an abnormal parameter proportion, a correlation coefficient and a collaborative deviation degree to judge a potential fault; and if yes, establishing a correlation graph and a fault influence chain, and identifying an abnormal source. And multi-dimensional accurate diagnosis is realized, misjudgment is reduced, the source of abnormities is efficiently traced, and the fault diagnosis adaptability under a complex environment and multi-stage operation is improved.

The invention discloses a balance valve, a hydraulic control system and an operation machine. A valve cavity is formed in a valve body of the balance valve, and an oil inlet and an oil return opening are formed in the circumferential wall of the valve cavity; the valve element and the control piston are inserted into the valve cavity in a sliding mode from the two axial ends, the valve element comprises a first element body and a second element body which is inserted into the first element body in a sliding mode in the axial direction, and a first concave part and a second concave part which are arranged at intervals in the axial direction are formed in the peripheral wall of the first element body. A first cavity and a second cavity are respectively formed between the first concave part and the inner peripheral wall of the valve cavity and between the second concave part and the inner peripheral wall of the valve cavity, so that the overflowing area between the first core body and the valve cavity can be increased, and the oil inlet and the oil return port are respectively and correspondingly communicated with the first cavity and the second cavity; the driving end of the control piston penetrates through the first core body, the control piston and the second core body are coaxially and oppositely arranged in a spaced mode, and the control piston moves in the axial direction to drive the second core body to move in the axial direction and drive the first core body to move, so that oil in the first cavity and oil in the second cavity are communicated or blocked.