1640 results about "Axial displacement" patented technology

The invention belongs to the field of equipment coupling monitoring, and particularly relates to a dynamic coupling compensation method for thermal expansion and axial displacement, which comprises the following steps of: calculating a first characteristic value for representing reference dynamic offset of a sensor based on a three-dimensional thermal-structure coupling model by acquiring a thermal expansion parameter and axial displacement parameter sequence of a casing; calculating a second characteristic value representing the real position change of the rotor in combination with a rotor-casing axial thermodynamic model, establishing a piecewise coupling function considering a nonlinear effect, working condition self-adaption and cross interference, and eliminating the mechanical thermal inertia and measurement system lag influence through a dynamic delay compensation mechanism; an accurate axial displacement measurement total error compensation index is generated, and grading compensation actions are intelligently triggered according to error grades; the problem of measurement distortion caused by dynamic coupling of thermal expansion and axial displacement is effectively solved, and the accuracy and reliability of state monitoring of the rotating machine are remarkably improved.

The invention relates to the technical field of wind power generation. The invention provides a fan main shaft backward movement monitoring and evaluating method and system. The method comprises the following steps: acquiring an axial displacement signal, a vibration signal, a bearing temperature signal and a lubrication state parameter of a fan main shaft in real time; based on a multi-parameter fusion algorithm, performing coupling analysis on the axial displacement, the vibration amplitude, the bearing temperature and the lubrication state to generate a comprehensive risk index; performing dynamic diagnosis on the comprehensive risk index in combination with a main shaft backward movement mechanism model, and identifying at least one fault root cause of axial force imbalance, thermal stress abnormality or lubrication failure; an alarm threshold value is dynamically adjusted according to wind speed change, temperature fluctuation and load working conditions, and graded early warning is triggered based on the fault root cause; and based on historical operation data and a real-time monitoring result, evaluating a main shaft backward movement risk level, and generating a decision report containing a maintenance priority and a technical improvement suggestion. The problem that existing fan main shaft backward movement monitoring depends on manual inspection and offline detection technologies, and limitation exists is solved.

An in-situ fretting corrosion fatigue testing machine based on synchrotron radiation diffraction and three-dimensional (3D) imaging includes an axial fatigue loading system, a fretting loading system, and a corrosion environment control system, where the axial fatigue loading system includes a driving device, a load control device, and a load sensing device; the load sensing device is configured to measure an axial force and a normal force in real time; the driving device is configured to drive the load control device, thereby achieving axial displacement of the load control device; the load control device is configured to carry out axial fatigue loading of a specimen; and the fretting loading system includes a fretting wear device. The testing machine achieves real-time 3D imaging characterization of wear spot and crack morphology of a material in a fretting corrosion environment, as well as characterization of a residual stress evolution law.

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 provides a shaft end nut locking position identification and tightening control method, and belongs to the technical field of industrial intelligent manufacturing, and the method comprises the steps: installing a high-precision inductive displacement sensor to monitor the axial displacement of a nut in real time; constructing a tightening control system of an integrated torque measurement and displacement monitoring unit; collecting real-time displacement data and eliminating interference through a sliding window filtering algorithm; identifying a nut locking critical point based on a displacement gradient analysis method; calculating an optimal torque function according to the shaft end contact mechanical mathematical model; the locking torque is accurately adjusted by adopting a temperature compensation type torque control method; a multi-mode locking intelligent identification model is used for analyzing locking process parameters and dynamically adjusting a tightening control parameter set, and accurate identification of an initial contact position and intelligent optimization adjustment of tightening parameters in the shaft end nut locking process are achieved.

The invention provides an air tightness detection device of a pressure balance type plug valve, and relates to the technical field of valve air tightness detection. An air tightness detection device of a pressure balance type plug valve comprises a water pool, an adjusting mechanism, two clamping mechanisms and an end sealing mechanism, the end sealing mechanism comprises two groups of positioning assemblies and two groups of sealing assemblies, and the positioning assemblies and the sealing assemblies are communicated and used for enabling the sealing assemblies to generate axial displacement. The sealing assembly is coaxially arranged in multiple layers, the structures of all the layers of the sealing assembly are the same, the sealing assembly is used for being inserted into an inlet and an outlet of a plug valve to be detected, and by means of the multi-layer design of the sealing assembly and the design that the positioning assembly enables each layer of the sealing assembly to generate independent axial displacement, the plug valve to be detected can be detected. The sealing assembly is adapted to plug valves to be detected with different calibers; the sealing assembly has the action of expansion under the action of air source pressure, so that the part inserted into the plug valve to be detected is in sealed connection with the plug valve, and the sealing performance is ensured.

A surgical kit includes a stapling device and a powered actuation assist detachably couplable to the stapling device. The stapling device includes an anvil half section, a cartridge receiving half section, and a firing assembly including an actuation knob movable along a length of the cartridge receiving half section. The powered actuation assist includes a motor assembly, a lead screw operatively coupled to the motor assembly, a knob connector coupled to the lead screw, a battery pack, and a first switch electrically coupled to the motor to activate the motor. The knob connector is configured to detachably engage the actuation knob of the stapling device to impart axial displacement to the actuation knob. Actuation of the motor assembly imparts rotation to the lead screw, which, in turn, causes axial displacement of the actuation knob of the firing assembly.

The invention provides a high-power gearbox operation condition identification and risk early warning method, and belongs to the technical field of gearbox risk early warning based on deep learning. The method comprises the following steps: firstly, acquiring operation data of the high-power gear box under multiple working conditions based on multiple types of sensors, and preprocessing to form a time sequence data set; then, a multi-branch feature extraction model is designed, and depth features of specific working conditions such as tooth breakage, bearing faults, axial displacement and tooth backlash changes are extracted with priori knowledge as guidance; further constructing a gearbox operation condition recognition model, and realizing multi-label condition recognition and confidence evaluation through feature fusion based on an attention mechanism, Transform enhanced modeling and a graph reasoning network; finally, a multi-stage dynamic early warning module is designed, graded early warning is triggered by integrating the instantaneous state, the evolution trend and prognosis evaluation, and safe and stable operation of the high-power gearbox is guaranteed. According to the method, the recognition accuracy and generalization performance of complex working conditions and multi-fault concurrent situations are improved.

The invention discloses a laser radar windscreen wiper mechanism which comprises a track part and a moving assembly, and the moving assembly is provided with a transmission part coupled with the track part. The pivot shaft is connected to the transmission part in a circumferential rotation mode, the windscreen wiper assembly comprises a windscreen wiper base and a windscreen wiper strip fixed to the windscreen wiper base, and the windscreen wiper base is switched between an unfolding position and a containing position along with rotation of the pivot shaft; when the windscreen wiper base is located at the unfolding position and the moving assembly moves, the windscreen wiper strip can make contact with the surface of the laser radar window and form sliding fit with the surface of the laser radar window, meanwhile, the transmission part travels along the track part, the curvature change of the track part is converted into axial displacement of the pivotal shaft, and the pivotal shaft is driven by the transmission part. The laser radar window surface cleaning device has the advantages that the laser radar window surface cleaning effect is good, the structure is simple, the service life is long, and the laser radar window surface cleaning device is good in laser radar window surface cleaning effect, and the laser radar window surface cleaning device is simple in structure and long in service life.

A fastening device for releasable connection to a perforated rail of an aircraft and a method of assembly for such a fastening device. The fastening device comprises a housing having at least one locking head portion fixedly connected to the housing, at least one shear pin and an actuating pin. The locking head portion is insertable into a rail hole of the perforated rail and slidable along the longitudinal direction of the perforated rail to a locking position in which the locking head portion engages a slot portion of the perforated rail. The shear pin can be engaged with a rail hole of the perforated rail by axial displacement. The actuating pin is rotatably arranged relative to the housing and connected to the shear pin in such a way that a rotation of the actuating pin causes an axial displacement of the shear pin relative to the housing.

The invention discloses a centerless grinding machine grinding wheel guide wheel center height and end face combination adjusting device and a centerless grinding machine, which realize the adjustment of the center height and end face parallel difference of a guide wheel and a grinding wheel, simplify the adjusting process and reduce manual intervention, thereby improving the production efficiency. According to the centerless grinding machine, a guide wheel frame of the centerless grinding machine achieves grinding angle rotation through an eccentric rotation shaft, the eccentric rotation shaft is provided with a centering sliding block, and axial displacement adjustment of a guide wheel main shaft system is achieved through a sliding block displacement adjusting device. A grinding wheel spindle system is arranged on one side of the guide wheel spindle system; an eccentric shaft fastening screw is arranged on the guide wheel main shaft system and is used for fastening the guide wheel frame and the eccentric rotating shaft into a whole; the centering sliding block and the sliding block displacement adjusting screw rod are both installed in the guide wheel frame installation fixing body, the centering sliding block is matched with the fixing body sliding groove, one end of the sliding block displacement adjusting screw rod is connected with the centering sliding block, and the other end of the sliding block displacement adjusting screw rod extends out of the guide wheel frame installation fixing body and is connected with the adjusting screw rod fixing frame.

The invention discloses a high-pressure gas cylinder pressure stabilizing device used in a continuous high-temperature curing furnace. The high-pressure gas cylinder pressure stabilizing device comprises a mounting bracket, a pressing module and an inflation butt joint module, the pressing module comprises a top mounting seat and a pressing block; the top mounting seat is mounted on the mounting bracket through a top displacement adjusting mechanism; the pressing block can be mounted on the top mounting seat through a vertical displacement adjusting mechanism; the inflation butt joint module comprises a side mounting seat and an air tap male head; the side mounting seat is mounted on the mounting bracket through a side displacement adjusting mechanism; the air tap male head is mounted on the side mounting seat through an axial displacement adjusting mechanism; a tail inflation rod is fixed to the tail of the air tap male head, and a rotary connector capable of being connected with the air inlet end of the inflation air path is installed at the tail of the tail inflation rod. The device has the advantages of being convenient to use, simple and compact in structure, capable of being accurately in butt joint with the inflation nozzle on the gas cylinder and the like.

A floating joint and retainer connection device with pressure relief structure includes a hollow fixed retainer; an adaptor joint having an engaging end and a fitting end extended through the fixed retainer to an outer side thereof, and a buffering section located between the engaging and fitting ends; a slidable washer and a fixing element fitted on an outer surface of the fitting end to limit the adaptor joint from moving axially relative to the fixed retainer; an elastic element located between the fixed retainer and the slidable washer; a slidable spacer having an axially protruded section formed on one side; and a spring fitted around the buffering section with two ends pressed against another side of the abutting spacer and a shoulder portion on the adaptor joint. With the above pressure relief structure, the adaptor joint can stay at any radially displaced position relative to the fixed retainer.

The invention relates to the technical field of industrial water treatment equipment, and discloses an intelligent flushing self-cleaning filter system for industrial water treatment. A dynamic suspended matter monitoring module of the system collects three-dimensional distribution data of deposits on the surface of a filtering medium in real time, and mixed deposition characteristics of suspended solids and oil stains are recognized through a multispectral imaging technology; the differential pressure trigger control module establishes a mapping relation between sediment thickness and fluid resistance according to the three-dimensional distribution data, and generates a cleaning trigger instruction when the real-time differential pressure data reaches a dynamic threshold interval; the spiral trajectory planning module analyzes the cleaning trigger instruction, and generates a composite motion trajectory containing a rotation angular velocity and an axial displacement rate in combination with the current position of a suction nozzle and a filter screen topological structure; the multi-mode flushing execution module synchronously adjusts torque output of a hydraulic motor and linear displacement of a piston cylinder based on the composite motion trail, so that a suction nozzle covers the whole effective filtering area of a filter screen along a spiral path.

The invention relates to a composite percussion drilling speed increasing tool, and belongs to the technical field of drilling tools. The reciprocating hammering unit comprises a hammer body and an impact hammer, the hammer body is axially and slidably connected into the sleeve, the impact hammer is rotatably connected into the hammer body, a reversing sleeve is rotatably connected into the impact hammer, a reversing cabin is arranged on the reversing sleeve, and a reversing runner hole is formed in the hammer body; the flow channel switch unit comprises a baffle ring arranged on the surface of the hammer body and a transmission mechanism connected between the sleeve and the baffle ring, and the transmission mechanism is used for converting axial motion of the baffle ring into rotary motion so as to open or close the reversing flow channel hole. When the drilling tool is lifted, the axial movement of the baffle ring can be converted into rotary movement, so that the baffle ring rotates relative to the hammer body while axially displacing along with the hammer body, a reversing flow channel hole is shielded, and high-pressure drilling fluid cannot flow into a reversing cabin, so that high-frequency composite impact is stopped, vibration and abrasion caused by idling are avoided, and the service life of the drilling tool is prolonged. And the service life and the safety of the tool are improved.

The invention relates to the field of wind power tower construction, in particular to a wind power tower self-climbing crane which comprises a frame unit, a variable-diameter clamping unit and a crane unit. The frame unit comprises a main frame and a movable frame which are in sliding connection, and the main frame and the movable frame are connected through a hydraulic driving mechanism. The crane unit is arranged on the top of the main frame. The variable-diameter clamping unit comprises a first variable-diameter clamping mechanism and a second variable-diameter clamping mechanism which are arranged around the wind power tower drum, the first variable-diameter clamping mechanism is connected with the main frame, and the second variable-diameter clamping mechanism is connected with the movable frame. The first variable-diameter clamping mechanism and the second variable-diameter clamping mechanism alternately clamp the wind power tower, and the main frame and the movable frame are alternately pushed and pulled through the hydraulic driving mechanism to ascend and descend so as to drive the crane unit to move in the axial direction of the wind power tower. The problems that existing wind power hoisting equipment is difficult to enter a site, the hoisting height is limited, transition is inconvenient, and the installation efficiency is low are solved.

The utility model discloses a suspension type viscosity and density on-line measuring device. The device comprises a cavity, a rotating part, a reference rotor, a suspension rotor, a torsional elastic piece and a distance measuring sensor, the rotating part is fixedly connected to the cavity; the reference rotor is fixedly connected to the outer wall of the rotating shaft, synchronously moves along with the rotating shaft and is higher than the liquid level of measured liquid; a suspension detection end is arranged at the upper end of a suspension body of the suspension rotor, the suspension body is connected with the rotating shaft through a torsion elastic piece, the suspension body suspends in detected liquid, the suspension detection end is exposed out of the detected liquid, and the suspension rotor is driven by the rotating shaft to rotate; the distance measuring sensor fixed in the cavity measures the rotating speed of the reference rotor, the axial displacement of the suspension detection end and the phase difference between the reference rotor and the suspension rotor so as to calculate the viscosity and density of the liquid to be measured. The device has the effects of measuring the density and the viscosity of liquid in real time and being high in measurement precision.

The invention relates to the technical field of rotary kiln calcining equipment, in particular to a rotary kiln calcining method based on annular air curtain sealing, which comprises the following steps: S1, dynamic gap three-dimensional modeling: collecting a radial gap value between a kiln body flange end face and a static housing in real time through radial distance sensor groups uniformly distributed on the circumference; synchronously obtaining the axial displacement of the kiln body; constructing a dynamic gap three-dimensional topology model based on the angle distribution data of the radial gap value and the axial play vector; s2, generating a double-layer vortex air curtain; s3, dynamically regulating and controlling air curtain parameters; and S4, sealing efficiency closed-loop control is conducted, specifically, the escape dust concentration of the outer wall of the static housing is detected, and when the concentration exceeds the standard, the compensation coefficient of the reference flow velocity is increased according to the gradient, and the step S2 is executed again. The sealing effect of the rotary kiln is greatly improved by adopting a double-layer vortex air curtain sealing technology, dynamic gap modeling, air curtain parameter dynamic regulation and control and sealing efficiency closed-loop control.

The application provides a downhole hydraulic back-off tool, characterized in that the back-off tool comprises a hydraulic anchor, a hydraulic back-off device and a telescopic compensation mechanism, and the power part is composed of a driving cylinder, a driving pin, an anti-rotation cylinder, a rotating cylinder, a third spring, a central shaft, an inner ratchet mechanism, a driving shaft and an outer ratchet mechanism; the one-way left-rotation part of the hydraulic back-off device comprises the inner ratchet mechanism and a second spring, and the anti-rebound right-rotation part comprises the outer ratchet mechanism and a first spring. The application makes all the torques of the workover operation be transmitted to the fishing tool through the relative movement of the inner ratchet mechanism and the outer ratchet mechanism from the hydraulic back-off device, and the working string does not need to transmit the torque to the downhole through the surface wellhead rotary table or the top drive, the hydraulic anchor is anchored and unanchored through the pressure in the string, and the anchor provides a fulcrum function for the timely cooperation of the power torque output of the hydraulic back-off device; the telescopic compensation mechanism is used for compensating the axial displacement of the back-off tool.

The invention relates to the technical field of pipe bending machines, and discloses petroleum pipeline thick-wall hot pipe bending equipment with a medium-frequency induction heating device. The petroleum pipeline thick-wall hot pipe bending equipment comprises a core rod body, the core rod body comprises a guide rod connected with a rack and a guide column arranged at the tail end of the guide rod, and the tail end of the guide column is provided with at least two supporting joints which are in spherical hinge joint; elastic edges are arranged on the edges of the supporting joints and filled with hydraulic oil. According to the device, through coaxial and synchronous rotation matching of the wheel die and the clamping die, the guiding and limiting effects of the guiding die and the internal supporting design of the core rod body, a cooperative machining mechanism of external fixing, external guiding and internal supporting is formed, and the problems of axial displacement and radial deviation in the bending process of the thick-wall petroleum pipeline are effectively avoided. In the core supporting structure, multiple sets of supporting joints capable of flexibly rotating can be attached to the inner wall in a self-adaptive mode along with the bending radian of the pipeline, and a dynamic supporting system composed of elastic edges and hydraulic oil can dynamically adjust the supporting force according to the bending angle.

The utility model discloses a riser connector anti-rotation device which comprises an anti-rotation block arranged between a male connector and a female connector, the lower portion of the anti-rotation block is provided with a bearing protrusion, a locking protrusion of the male connector is provided with a plurality of positioning grooves, the groove depth of the positioning grooves exceeds the thickness of the anti-rotation block, and the inner wall of the female connector is provided with an annular matching groove. The anti-rotation block is inserted into the positioning groove and can move towards the female connector till the bearing protrusion is clamped into the female connector matching groove, the anti-rotation block and the male connector are fixed, and therefore axial displacement or rotation between the male connector and the female connector is prevented. By the adoption of the waterproof guide pipe connector anti-rotation device, in the installation process, generation of any spark is avoided, and due to the fact that the anti-rotation block and the male connector are fixedly connected into a whole, the whole connecting structure is firmer and more durable. In a long-term marine environment, looseness or damage caused by vibration and impact can be reduced, and therefore the service life of the waterproof guide pipe is prolonged.

The invention provides a disposable injection pen and an injection prompt structure thereof, the injection pen is characterized in that an upper pen shell assembly drives a pre-filled syringe in a lower pen shell assembly to realize an injection function, a rotary sleeve and a screw rod which are rotatably matched are arranged in the upper pen shell assembly, and the injection function of the syringe is completed by axially pushing the screw rod; according to the technical scheme, the sound part which synchronously rotates is arranged on the rotating sleeve, and at the tail end of injection work execution, the sound part axially slides relative to the rotating sleeve and collides with the rotating sleeve in the sliding process to make a prompt tone so as to prompt that injection is completed; the prompt tone of injection completion can be accurately prompted, and the user experience is improved.

The invention discloses a magnetic suspension bearing displacement detection method and device, a magnetic suspension bearing system, a storage medium and a computer program product, an axial displacement detection area of a magnetic suspension bearing is provided with four displacement detection probes used for detecting axial displacement of a rotor, and the four probes are divided into two groups; the first group of two probes are installed along a first symmetrical direction, the second group of two probes are installed along a second symmetrical direction orthogonal to the first symmetrical direction, the design parameters of the same group of probes are consistent, and the design parameters of the different groups of probes are not consistent; the method comprises the following steps: carrying out mean value and difference operation on signals acquired by four probes to eliminate radial coupling interference; and filtering the signal subjected to mean value operation and differential operation by adopting same-frequency notch processing so as to filter radial coupling interference. According to the scheme, high-precision stable operation of magnetic suspension axial displacement is realized.

The circuit breaker comprises a shell, an operating mechanism and a bimetallic strip, the operating mechanism comprises a draw bar shaft, a jump pin, a lock catch, a draw bar and a draw bar spring, the draw bar spring is used for driving the lock catch to rotate in the hasp fit direction with the jump pin, the draw bar comprises a rotating part, a triggering part and a re-buckling part, and the triggering part and the re-buckling part are integrally formed with the rotating part. The draw bar shaft is sleeved with the draw bar through the rotating hole, the draw bar can rotate around the draw bar shaft and slide in the axial direction of the draw bar shaft, and the draw bar directly locks the lock catch through the re-buckling part; and the thermal adjusting knob is used for adjusting the distance between the touch piece and the triggering part of the traction rod by adjusting the displacement of the traction rod in the axial direction of the traction rod shaft. According to the circuit breaker, the draw bar for directly locking the lock catch is unlocked by the bimetallic strip, the draw bar shaft serves as a rotating shaft and a sliding guide shaft of the draw bar, the thermal adjusting knob directly adjusts the position of the draw bar to realize a thermal adjustable function, and the draw bar integrates the thermal adjustable function and the re-buckling and tripping functions.

The invention provides a lining-free composite material storage box umbrella-shaped telescopic forming mold and a forming method. The lining-free composite material storage box umbrella-shaped telescopic forming mold comprises an umbrella-shaped supporting framework, a split type outer mold assembly, an adjusting screw rod and an outer mold locking device. The umbrella-shaped supporting framework comprises a front end socket radial telescopic connecting rod, a rear end socket radial telescopic connecting rod, a cylinder section radial telescopic connecting rod, a threaded sleeve, an adjusting sliding block, a quick release type sliding block locking device and a quick release device fixing pin. The threaded sleeve is guided to generate axial displacement through rotation of the adjusting screw rod, and unfolding and folding of the umbrella-shaped supporting framework are achieved. The split type outer die assembly is formed by splicing a plurality of light high-rigidity interlayer composite materials, Z-shaped splicing steps are arranged on the side faces of the die assembly, and block disengaging type locking devices are installed at the splicing positions of the side faces of splicing blocks. The outer mold locking device is mainly formed by combining a lock head pin and a lock body pin, the outer splicing blocks are reliably positioned, and the outer splicing blocks can be rapidly disengaged. The tool adopts modular design, has good supporting rigidity, is convenient to disassemble and assemble and high in reset precision, and remarkably improves the forming precision and efficiency of the composite material storage box.

The utility model relates to the technical field of planetary roller screws, in particular to a gearless planetary roller screw, which comprises a nut, a screw and a plurality of rollers. Assembling sections are arranged on the pin rollers; when the lead screw is a driving part, one of the assembling section and the nut is provided with annular teeth, the other one of the assembling section and the nut is provided with an annular groove, and the annular groove is matched with the annular teeth in a meshed mode so that no relative axial displacement exists between the pin rollers and the nut. When the nut is a driving part, one of the assembling section and the lead screw is provided with annular teeth, the other one of the assembling section and the lead screw is provided with annular grooves, and the annular grooves are matched with the annular teeth in a meshed mode so that no relative axial displacement exists between the pin rollers and the lead screw. Aiming at the defects of the existing planetary roller screw, a gear structure is eliminated, burrs generated by gear machining are eliminated, the cleanliness level of the roller is improved, the influence of the burrs on thread meshing is reduced, and the overall service life of the planetary roller screw is prolonged; impact and noise caused by gear meshing are avoided, and the overall NVH level of the planetary roller screw is improved.

The present invention discloses a plasma cutting machine for steel structures, belonging to the field of plasma cutting, comprising a base, wherein a cavity for accommodating liquid is provided inside the base, and a support grid frame is fixedly connected to the inner wall of the cavity, and a plurality of support flanges are integrally formed on the upper end of the support grid frame; an X-axial displacement portion is connected to the base, and a Y-axial displacement portion is connected to the movable end of the X-axial displacement portion, and a Z-axial displacement portion is connected to the movable end of the Y-axial displacement portion, and a mounting seat is connected to the movable end of the Z-axial displacement portion, and a plasma gun head is fixedly connected to one side of the mounting seat; cutting of steel structure workpieces is achieved in water, and underwater plasma cutting has a certain cooling effect on the workpiece, cutting torch and arc area. This rapid cooling limits the lateral expansion of the plasma arc at the upper part of the kerf, the melting range of the upper part is "compressed", and the width change of the lower part is relatively small, thereby reducing the taper.

The invention provides an automatic shaft end nut assembling and tightening device convenient to verify, belongs to the technical field of industrial manufacturing, and realizes the automation of the whole nut assembling process by integrating components such as a base, a conveying mechanism, a nut supply device, an assembling mechanical arm, a tightening mechanism and a verifying system. The core of the method is that a double-stage tightening control strategy is adopted, the tightening process is divided into a preliminary tightening stage and a reinforcing tightening stage, in the preliminary tightening stage, correct engagement of threads is ensured through a low-rotating-speed high-precision mode and dynamic damping control, and in the middle verification link, an axial displacement value is measured to find abnormity in time; in the reinforcing and tightening stage, a stepped torque increasing algorithm is adopted to ensure uniform distribution of stress, finally, the tightening quality is evaluated through multi-parameter comprehensive verification, a traceability code is generated, and the problem of unstable quality caused by a single-stage tightening mode of the shaft end nut is effectively solved.

The invention belongs to the technical field related to tunnel anti-seismic analysis, and discloses a green function analytical method and equipment for rayleigh wave dynamic coupling response of an interval tunnel in an inclined field. The method comprises the steps that S1, soil deformation and displacement in the x direction and the y direction caused by Rayleigh wave propagation are converted into tunnel equivalent seismic loads in the x direction and the y direction through a viscoelastic geobasic structure model; s2, a Timoshenko beam model on a viscoelastic Pasternak foundation is adopted to establish a partial differential equation set for controlling axial and transverse dynamic displacement responses of longitudinal discrete units of the interval tunnel; s3, deducing four Green functions representing the bidirectional dynamic coupling response of the tunnel in combination with a Green function method and an artificial spring boundary; and S4, performing integral operation on the Green function by using a superposition principle, and introducing an exponential function term containing time t to obtain axial displacement and transverse displacement of the tunnel and corresponding axial and transverse dynamic coupling response coefficients. According to the invention, the solving efficiency is improved.

The invention relates to the technical field of ship shafting measurement, and discloses a polar region ship shafting comprehensive measurement system and method, and the system comprises a data collection module, a preprocessing module, a data processing module, and an evaluation module. The data acquisition module acquires a strain signal, a vibration acceleration signal, a temperature signal, an axial displacement signal and a radial displacement signal of a shaft system through a sensor group, and the preprocessing module performs wavelet packet decomposition and adaptive threshold denoising, mean filtering and triple standard deviation criterion abnormal value elimination processing on the signals. The data processing module fuses the data of the same physical quantity based on an improved Kalman filtering algorithm and dynamically adjusts the weight of the fused data to obtain final optimized data, and the improved Kalman filtering algorithm comprises the step of introducing a temperature drift compensation factor into a state transition equation, and the evaluation module predicts potential fault types and development trends through an operation state evaluation model based on the optimization data.