677 results about "Contact pressure" patented technology

The invention discloses a while-drilling intelligent rock drill and method for self-calibrating a tunnel blast hole drilling track, and the while-drilling intelligent rock drill comprises a rock drill main body, a drill rod, a drill bit, an air leg, a monitoring module, an execution module and a control module, the monitoring module is used for receiving and collecting real-time data such as the drilling depth, the drill bit posture, the linear speed, the angular speed and the contact pressure of a drill bit and a rock stratum in real time and transmitting the data to the control module. The control module is used for receiving data of the monitoring module in real time, drawing an actual drilling track of a drill hole, calculating a drill hole deviation with a preset track, predicting lithology change in combination with an LSTM deep learning model, and outputting a correction instruction to the execution module; and the execution module dynamically adjusts the drilling deviation according to the received correction instruction. The method is realized based on the intelligent rock drill while drilling. The system has the advantages that the system has good real-time deviation monitoring and automatic calibration capabilities, the drilling precision can be effectively improved, and the problem of drilling deviation caused by lithology changes and personal errors is avoided.

The invention relates to the field of sealing testing, in particular to a sealing performance analysis method based on elastic-plastic contact calculation of finite element-boundary element coupling, which comprises the following steps: establishing a finite element model of a sealing structure, and obtaining contact pressure distribution of a sealing contact interface; dividing the sealed contact interface into a plurality of fan-shaped areas, and processing each fan-shaped area into a rectangular area; generating a rough surface of which the surface height value has a specified statistical distribution rule for each rectangular region, performing equivalent contact simplification for the rough surface in the sealing contact process, and solving the microscopic contact state of the rough surface; and constructing a contact state matrix based on the microscopic contact state, and determining a leakage channel by using the contact state matrix. The problems that a traditional rough surface microcosmic contact finite element simulation method is low in calculation efficiency and elastic-plastic contact deformation convergence is difficult are solved, and the efficiency of microcosmic contact calculation and sealing performance analysis is greatly improved.

The invention relates to the field of machining and automatic control, in particular to a pressure-sensing precision mechanical part polishing brush system and method. Comprising the following steps: converting and processing pressure data to obtain processed pressure data; calculating the difference between the current pressure and the target pressure based on the processed pressure data, and mapping the target pressure into the path track; optimizing the path through the path optimization objective function and the constraint condition to obtain an optimized path; based on the optimized path, obtaining a torque variation; a path adjustment amount is obtained through the torque variation; and correcting the optimized path through the gain parameter and the path adjustment amount to obtain a corrected path. The problems that the relation between the motion trail of the brush and the contact pressure is not accurately processed, and the motion trail of the brush is difficult to accurately control are solved.

The invention discloses a plastic pipe crack positioning method, which belongs to the technical field of nondestructive inspection, and comprises the following steps: constructing a pipe three-dimensional coordinate system, setting a three-dimensional contour scanning method, generating an effective point cloud, calculating the surface curvature of the effective point cloud, planning a detection path, generating an optimal detection path, and avoiding mechanical collision between a probe and a pipe structure. The optimal detection path is converted into a control signal, a pressure control method is set, the pre-tightening force of the position to be detected is calculated, pressure compensation is carried out on the hardened abnormal surface, so that the thin-walled tube is prevented from being damaged by pressure or the hard surface is prevented from being scratched, and the contact pressure is dynamically adjusted; transmitting sound waves to the to-be-detected position, setting a crack positioning method, performing crack detection, judging whether the to-be-detected position has defects or not, calculating a crack confidence coefficient, setting a threshold value to judge a true crack, setting a crack evaluation method, calculating a risk score of the crack, and generating a three-dimensional network model of the pipe. And the precision, efficiency and safety of plastic pipe detection are improved.

The invention discloses a TBM hob three-way rock breaking force prediction method and system based on a rotary cutting mode, and the method comprises the steps: building a hyperbolic function model of the cutting edge width and penetration depth of a hob, and optimizing the geometric structure of the hob to adapt to different rock stratums; an effective contact radius and a contact angle are calculated through a coupling motion trail equation of revolution and rotation of the hob; fitting a pressure distribution coefficient in combination with pre-test data, constructing a Hertz-Weibull stress coupling analysis model, and accurately representing stress distribution in the cutting direction and the radial direction; on the basis of contact pressure integration and stress decomposition, respectively deriving explicit calculation formulas of vertical, rolling and lateral rock breaking forces, and dynamically adjusting the rotating speed of the cutterhead, the propelling pressure and the hob spacing according to a rock breaking force prediction result. According to the method, the rock breaking force prediction precision in the complex rock stratum is remarkably improved, the TBM construction efficiency and the cutter service life are optimized, the over-excavation risk and energy consumption are reduced, and the method is suitable for intelligent tunneling control of tunnel engineering.

The invention provides a pipe jacking construction pushing frictional resistance prediction method considering on-way loss of a drag reducer, and relates to the technical field of constructional engineering. The method comprises the following steps: judging a pipe-soil slurry contact state; calculating the pipe-soil contact pressure; calculating the pipe-soil frictional resistance according to the pipe-soil contact pressure and the contact width; obtaining the initial thickness of the slurry sleeve and calculating the pressure drop ratio per unit length of slurry; according to the pressure drop ratio and the initial thickness of the slurry sleeve, the thickness of the slurry sleeve changed along the way in the pushing process is calculated; calculating pipe slurry sliding frictional resistance according to the thickness of the slurry sleeve; according to the pipe soil frictional resistance, the pipe slurry sliding frictional resistance, the pipeline radius and the contact width, the pushing frictional resistance is calculated; and if the predicted pushing frictional resistance exceeds an expected value, the grouting pressure is corrected. According to the method, on-way changes of drag reducer pressure and drag reducer thickness in pipe jacking construction are considered, a unit length pipe joint three-dimensional frictional resistance calculation formula considering longitudinal drag reduction attenuation is established, and compared with actual measurement results, the error of the method is only 3% and is far lower than that of a traditional means.

The invention discloses an intelligent laser cutting device for a cabinet plate of a switch cabinet, and relates to the technical field of laser cutting. Due to the fact that the thickness of a cabinet door plate is small, when the cabinet door plate is positioned and clamped, the clamping position of the plate is warped due to clamping pressure, the planeness of the plate is affected after warpage, and the edge of the cut plate is bent, the bottom of the plate is supported through cooperation of an angle pressing plate and a bottom supporting plate and cooperation of the bottom supporting plate and a supporting mechanism when the plate is positioned; meanwhile, through contact pressure between the cambered surface of the corner pressing plate and the top of the plate, the corner pressing plate slides and moves upwards under the limitation of the sliding column, the rubber cushion block deforms to generate elastic force, the elastic force is transmitted to the clamping corner of the top of the plate through the corner pressing plate, clamping compression deformation of the corner of the plate is limited during clamping and positioning, warping of the plate is avoided, and the machining precision of the plate is improved. And meanwhile, the flatness of the plate is affected after warping, and the edge of the cut plate is bent.

The invention discloses a compression type external casing packer based on petroleum low-carbon exploitation, and relates to the technical field of oil field downhole tools, the compression type external casing packer comprises a casing pipe, a micro-deformation adjusting mechanism is arranged in the casing pipe, and when the packer is in the installation process, the micro-deformation adjusting mechanism is in a contraction state so as to guarantee that the packer can be smoothly put into the casing pipe; according to the device, the rubber sleeve assembly adopts a multi-section combined design and is formed by sequentially connecting at least three cylindrical rubber sleeves in series in the axial direction, the multiple sections of cylindrical rubber sleeves can achieve differential adaptation through cooperative deformation, aiming at the local diameter expanding section of the inner wall of the sleeve, the rubber sleeves at the corresponding positions can more sufficiently expand in the radial direction to fill gaps, and the sealing performance of the sleeve is improved. The expansion amount of a local reducing section can be properly controlled to avoid excessive extrusion, meanwhile, the contact area of the multiple sections of rubber barrels and the inner wall of the sleeve is larger, the contact pressure of the sealing face can be effectively dispersed, and a uniform and stable sealing pressure field is formed in the whole well section.

The invention relates to the technical field of scraper conveyors, in particular to a scraper type slag salvaging machine which comprises a shell, a material bearing plate is arranged in the shell, a driving shaft and a driven shaft are rotationally arranged at the front end and the rear end of the shell respectively, a chain assembly is wound around the driving shaft and the driven shaft, and the chain assembly comprises two first chains and a second chain. The second chain is located between the two first chains, a plurality of rotating shafts are arranged on the second chain front and back at intervals, two telescopic scraping plates are hinged to the rotating shafts, each telescopic scraping plate comprises a first scraping plate and a second scraping plate which are in sliding connection, the first scraping plates are rotationally arranged on the rotating shafts, and each second scraping plate is fixedly connected with one first chain; the telescopic scraping plate slides along the surface of the material bearing plate, when slag materials driven by the telescopic scraping plate are increased, the length of the telescopic scraping plate is increased, meanwhile, rotation of the telescopic scraping plate can drive the first chain to be tightened, the contact pressure between the telescopic scraping plate and the surface of the material bearing plate is increased, and the phenomenon of material leakage is avoided.

The invention relates to the technical field of guide rail machining, in particular to a milling smoothness treatment device based on the surface of an elevator guide rail and a using method.The milling smoothness treatment device comprises a base, supporting rollers and a positioning plate, side plates are fixedly connected to the two sides of the upper end of the base, and one ends of the side plates are connected with the positioning plate through electric push rods; the guide rail is placed at the upper end of the supporting roller, the two milling smoothness treatment mechanisms are installed on the two sides of one end of the guide rail, the bottom ends of the milling smoothness treatment mechanisms are installed in the groove, the dust removal boxes are installed on one sides of the milling smoothness treatment mechanisms correspondingly, and the dust removal fans are installed on the side faces of the dust removal boxes through the filtering boxes. The abrasion condition of the grinding wheel is monitored in real time, and the position of the grinding wheel can be finely adjusted according to the detected condition, so that it is guaranteed that the contact pressure between the grinding wheel and the guide rail is within a certain range all the time, and then the smoothness of the ground guide rail surface is effectively improved.

The invention belongs to the technical field of mechanical design, and discloses a service performance traction assembly interface ideal prestress distribution inversion design method and a related device, and the method comprises the steps: carrying out the feature mapping of assembly interface morphology-stress on a matching surface, and obtaining a contact pressure value and a relative coordinate of each node; according to the contact pressure value and the static contact stress, performing static ideal contact stress distribution inversion to obtain static ideal contact stress distribution; and according to the static ideal contact stress distribution, predicting the morphology layout driven by the static contact stress distribution of the assembly interface. According to the method, the morphology layout driven by the static contact stress distribution of the assembly interface can be assembled, machining can be carried out on the assembly interface according to the morphology layout of the assembly interface, the connection performance uniformity of the assembly interface in the dynamic service state can be effectively improved, and the purpose of improving the dynamic connection performance of high-end equipment parts such as aero-engines is achieved.

The invention discloses automatic welding equipment for iron accessories of an electric iron tower, and relates to the technical field of welding equipment. When transmission of wires needed by welding is blocked, errors occur between the conveying speed of the wires and the welding speed, and consequently welding work cannot be carried out normally, the outer diameter change of the rotary column is matched with the width change of the through groove of the side groove plate, the wires are concentrated in the center area to be guided out, the process of guiding the wires into a welding gun is smoother, and the welding efficiency is improved. Meanwhile, by means of the change of the outer diameter of the rotary column, when the wire deviates, the large outer diameters on the two sides limit deformation of the rubber barrel, increase contact pressure between the rubber barrel and the wire, increase friction force and provide larger power for transmission of the wire, and when the rotary column is matched with the side groove plate, when the wire deviates, transmission acting force is increased, so that the wire is smoothly guided and conveyed, and the service life of the wire is prolonged. And the situation that welding cannot be conducted due to the fact that conveying of the wire is blocked when the wire deviates is avoided.

The utility model discloses a butterfly valve with an elastic butterfly plate, relates to the technical field of butterfly valves, and solves the problems of abrasion, jamming, poor durability and the like in the prior art. The whole butterfly plate is in a plate sheet shape and is made of an elastic metal material, the butterfly plate comprises an inner disc part located in the center and a contact part located on the periphery of the inner disc part, the section of the contact part is in a bent shape, and the outline trend of the contact part is that the contact part is gradually away from the valve rod firstly and then bent inwards to approach the valve rod; and the valve seat is in sealing fit with the contact part. A plate-shaped butterfly plate structure integrally formed by an elastic metal material is adopted, and the contact part of the butterfly plate generates radial expansion deformation during closing through the elasticity of the material, so that a sealing surface gap caused by machining errors, thermal expansion and medium impurities is adaptively compensated, and the dependence on the assembly precision is remarkably reduced; the section of the contact part adopts a bent profile which firstly gets away from the valve rod and then gets close to the valve rod, the elastic deformation capacity is enhanced, and the contact pressure of the sealing surface can be gradually enhanced in the rotating closing process of the butterfly plate.

The invention discloses press-fit equipment with a ventilation structure for preparation of an anti-explosion valve protection patch, relates to the technical field of preparation of anti-explosion valve protection patches, and aims to solve the problem that wrinkles are caused due to the fact that no adjustment space exists after dislocation occurs between a release film and a base layer material. According to the anti-explosion valve protection patch with the ventilation structure, when a material penetrates through a gap between a film pressing roller and a pre-pressing roller through elastic acting force of a spring and a transverse backing ring, the film pressing roller and the pre-pressing roller are driven to rotate through friction under the action of contact pressure, the material is extruded at intervals through an arc-shaped protruding strip in the rotating process of the pre-pressing roller, and therefore the material is prevented from being damaged. According to the invention, the materials are pressed at intervals, the materials are not completely pressed while the materials are preliminarily pressed and positioned, the materials are positioned before being completely pressed, and after the materials are staggered during pressing, the positions of the materials can be adjusted under the pressing effect through the interval pressing, so that wrinkles are avoided.

The invention discloses a grinding and polishing removal error compensation control method considering the dynamic error of a robot, and the method achieves the prediction of the grinding and polishing removal depth through the building of a grinding and polishing removal depth prediction model considering the dynamic error of the robot, and solves the problem of non-linear distribution of the contact pressure and relative sliding speed of a side edge during the machining of the side edge. The limitation of a traditional Hertz model in narrow space side blade contact mechanical modeling is broken through, and accurate prediction of the grinding and polishing removal amount and the surface appearance is achieved; and then an offline-online collaborative layered compensation mechanism is provided, a space-time transmission mechanism of robot errors under time-varying dynamics is identified, accurate tracking of a deterministic grinding and polishing trajectory is achieved, and the grinding and polishing contour precision of the whole component is improved.

The invention relates to a quasi-static straight gear wear numerical analysis method, and belongs to the technical field of mechanical engineering. The method comprises the following steps: calculating a dynamic wear coefficient by using a mixed lubrication model; the contact pressure and the sliding distance are calculated in an integral form, a straight gear quasi-static numerical wear model is established by using matlab software with the help of an Archard formula, and a wear value is calculated; the influence rule of the modulus, the torque and the tooth width on the abrasion loss is obtained, and meanwhile the significance of the influence of the three factors is analyzed through an orthogonal experiment method. Compared with the prior art, the method has the advantages that the problem that the calculation of the contact pressure is greatly influenced by the grid units is researched and solved, so that the obtained contact pressure value is more accurate, and the tooth surface wear is reduced according to the rule and significance analysis of the influence of various factors.

The invention discloses a uniformity removal trajectory planning method and system suitable for flexible grinding and polishing machining, and the method comprises the steps: S100, building a material removal depth model and a material removal profile at a grinding and polishing point after a flexible grinding and polishing contact wheel is in contact with a workpiece according to the contact pressure in a flexible grinding and polishing profile contact region; s200, correcting the material removal depth model by considering the variable quantity of the chord height error caused by the compliant contact deformation to obtain a corrected material removal depth model; and S300, based on the corrected material removal depth model, the material removal profile is fused into the corrected material removal depth model to realize uniformity removal trajectory planning considering material removal characteristics, and a processing trajectory sequence containing attitude information is obtained. According to the method, equal chord height error step length calculation of contact deformation and equal residual height line spacing calculation of uniform material removal are considered, so that uniform removal trajectory planning of smooth grinding and polishing is realized, and the problem of trajectory discontinuity caused by elastic deformation is remarkably reduced.

To restrain occurrence of a gap in a first direction between a contact target object and a shielding member and an increase in the gap.SOLUTION: A shielding member 21 includes a base portion 60 and a movable shield portion 70 that is displaceable with respect to the base portion 60. The movable shield portion 70 has a contact portion 73 that is configured to come into contact with a contact target object 92 by making the contact target object 92 and the shielding member 21 approach each other in a first direction. The contact portion 73 is configured to generate contact pressure in the first direction due to the contact with the contact target object 92. The movable shield portion 70 is configured to be displaced in the first direction when a contact portion 32 is pressed in the first direction by the contact target object 92.SELECTED DRAWING: Figure 2

The intelligent sensing and pressure self-adaption support pile system comprises a plurality of support pile bodies, a sensor network, a hydraulic servo adjusting system and an intelligent control unit. The support pile body is of a conventional foundation pit support pile structure, is prefabricated by reinforced concrete or is formed by cast-in-place, provides a basic support function and resists soil pressure; the sensor network is embedded into the support pile body and monitors the strain condition of each pile body in real time; the intelligent control unit calculates support parameters according to monitoring data of the sensor network and outputs a control instruction; and the hydraulic servo adjusting system automatically adjusts the contact pressure between the pile and the soil according to the control instruction. The system can monitor the stress state of a pile body in real time and automatically adjust supporting parameters through the hydraulic servo system, so that the safety and reliability of foundation pit engineering are remarkably improved.

The invention relates to equipment and a method for testing interference friction force and hydraulic locking force of a composite roller, and belongs to the technical field of composite roller testing. The testing equipment comprises a shaft core and an inner supporting expansion mechanism, the shaft core is hollow and is provided with shaft core sections with different diameters and is hollowed out, the inner supporting expansion mechanism comprises a lead screw, a plurality of outer supporting strips and a connecting rod supporting structure connected with the outer supporting strips and the lead screw, and the lead screw drives the outer supporting strips to move in the radial direction to be in interference fit with a roll collar to be tested. A first pressure sensor is arranged to measure contact pressure, and a second pressure sensor is arranged to measure locking force applied to a plurality of positions. According to the invention, the interference magnitude is accurately controlled and pressure data is collected through the inner support expansion mechanism, the interference friction force and hydraulic locking force transmission effect of the composite roller under different interference magnitudes can be accurately detected, and reliable test data is provided for the design of the composite roller.

The invention relates to the technical field of bearings, in particular to a comprehensive evaluation method and system for the sealing performance of a deep groove ball bearing. According to the method, the actual working state of the deep groove ball bearing is obtained through the dynamic contact half width and the contact stress, the health condition of a sealing part can be reflected more accurately, and the dynamic characteristics of the sealing change in the working process of the bearing can be captured in time by measuring the total contact pressure and the contact stress in real time; by monitoring the pressure driving leakage rate and the centrifugal effect leakage rate of the contact area of the sealing lip and the bearing ring, the sealing performance can be evaluated more directly and accurately, and by monitoring the dynamic oil film thickness and the medium pressure difference of the contact area in real time to obtain the leakage rate, the sealing state can be reflected more accurately. By comprehensively considering various factors such as the pressure driving leakage rate and the centrifugal effect leakage rate, a more comprehensive sealing efficiency index can be obtained, and the accuracy and reliability of sealing performance evaluation are improved.

The invention belongs to the technical field of grinding equipment, and discloses a high-energy jet mill with a pressurizing structure, the high-energy jet mill comprises a base and a fixing plate, the fixing plate is fixedly mounted at the top of the base, a grinding bin is fixedly mounted in the fixing plate, and a first ventilation pipe is fixedly mounted on the outer wall of the grinding bin; and a main airflow pipe is fixedly mounted on the inner wall of the grinding bin. When the two sets of pressurizing bins conduct airflow supply operation, the other two sets of pressurizing bins can compress air in the pressurizing bins through piston movement of piston rods, so that when a pressurizing airflow pipe is aligned with the pressurizing bins, the compressed air can improve the contact pressure between airflow grinding materials and the surface of a machined material, the speed of pressurized airflow is higher, and the working efficiency is improved. Compared with the prior art, the impact frequency on the surface of the machined material is larger, the machining time can be remarkably shortened, the production efficiency is improved, the production cost is reduced, and more importantly, the grinding effect of the material is better, and grinding is more thorough.

The invention relates to the technical field of metal casting sawing, and particularly discloses a sawing machine for metal casting machining, which comprises a supporting structure, a fixing device and a protective device, and the supporting structure can support the whole device to operate stably; the fixing device is arranged in one end of the top of the supporting structure, adopts a crossed fixing structure of double first fixing rods driven by a first hydraulic push rod and a second fixing rod driven by a second hydraulic push rod, and is matched with right-angle positioning formed by the supporting platform and a first supporting L-shaped plate; stable clamping can be formed for metal castings in different shapes such as a round shape, a rectangular shape and a special shape, and the limitation that a traditional sawing machine can only fix castings in a single form is effectively overcome; a first contact type pressure sensor is embedded in the first fixing rod, a second contact type pressure sensor is embedded in the second fixing rod, and the sensors are electrically connected with the corresponding hydraulic push rods respectively, so that the contact pressure of the fixing rods and the casting can be detected in real time, and the fixing force of the hydraulic push rods is adaptively adjusted.

The invention discloses metal barrel welding equipment for filter machining, and relates to the technical field of welding equipment. According to the metal barrel welding equipment for filter processing, due to the fact that a barrel is formed by rolling a plate, but the plate has deformation stress, a gap exists in the welding position of the rolled barrel, and therefore the phenomenon of pseudo soldering is likely to occur in the gap position welding process in the welding process; when the welding gun is close to the welding position of the barrel, the ball head is in contact with the two sides of the welding position of the barrel, the contact pressure between the ball head and the barrel is matched with the characteristic that the ends, away from the side sliding blocks, of the connecting rods are close to each other, the two sides of the welding position of the barrel are pressed, it is guaranteed that the welding position of the barrel is tightly attached, and the phenomenon that a plate for rolling the barrel rebounds is avoided. A gap is formed in the welding position of the barrel, insufficient welding occurs in the gap during welding, and the welding effect of the barrel is affected.

The invention provides a gluing method for gluing a cork board and a base material, which comprises the following steps of: 1, brushing glue on the gluing surface of the cork board and the base material, and adhering the cork board and the base material; 2, the airtight bag film is pasted to the base material through a sealing rubber strip, the cork board pasted to the base material is covered with the airtight bag film, and an airtight area is formed at the glue joint position of the cork board; and 3, an opening is formed in the airtight bag film, a suction head communicated with a vacuum pump is placed in the airtight bag film, the airtight area in the airtight bag film is pressurized through the vacuum pump, negative pressure is formed in the airtight area, and gluing of the cork board and the base material is achieved. Large and uniform contact pressure is provided for the glue joint area of the cork board in a vacuum pressing mode, and the glue joint strength and the glue joint quality between the cork board and the base material are improved.

The purpose of the present invention is to enable easy connection work while obtaining high connection reliability between a pin terminal and a socket terminal. This socket terminal is connected to a pin terminal, and is provided with: a cylindrical part having a cylindrical base part and a plurality of spring contact pieces arranged in the circumferential direction of the cylindrical base part; and an urging member externally fitted to the cylindrical portion, each of the plurality of spring contact pieces extending from the cylindrical base portion in the axial direction of the cylindrical base portion and being elastically deformable in the radial direction of the cylindrical base portion, the urging member urging each of the plurality of spring contact pieces toward the inner circumferential side, and applying a contact pressure from each of the plurality of spring contact pieces against the pin terminal, the urging member urging each of the plurality of spring contact pieces being elastically deformable in the radial direction of the cylindrical base portion. The biasing member is made of a shape memory alloy that memorizes the shape so that the contact pressure is increased by temperature rise.

The invention relates to the technical field of grinding equipment, in particular to a double-sided grinding machine planetary gear train multi-station positioning mechanism which comprises a rack, a grinding table arranged above the rack and a sealing cover installed through a lifting mechanism and further comprises a sun gear and an outer gear ring which are concentrically distributed on the surface of the grinding table, and the sun gear is connected with a driving mechanism; an annular grinding disc arranged between the sun gear and the outer gear ring and a grinding disc arranged on the sealing cover form a closed grinding cavity; and the workpiece mounting mechanisms are arranged in the closed grinding cavity. By means of the spring and the sliding block linkage mechanism arranged in the planetary gear, the clamp can form floating clamping force in the radial direction and the axial direction. When abrasive dust accumulation on the two sides of the workpiece is not uniform, the vertical sliding block achieves axial displacement through elastic compensation of the first spring, the horizontal sliding block adjusts radial clamping force through the second spring, and it is guaranteed that the workpiece always keeps uniform contact pressure with the upper grinding disc and the lower grinding disc.

The invention relates to the field of power equipment installation, and discloses a special transformer intelligent fusion terminal guide rail modular installation system and method.The method comprises the steps that the installation state of an intelligent fusion terminal body is dynamically sensed, and an initial constraint model of the installation direction is generated in combination with an attitude angle detection result; performing direction deviation detection on the initial constraint model, and calculating attitude offsets in the longitudinal and transverse directions; the expansion module is pushed into the standard interface of the terminal body along the guide rail direction, and the propulsion angle and the contact pressure are monitored in real time in the plugging process; when it is detected that the propelling angle deviates from the preset range and changes abnormally along with the contact pressure, whether propelling angle adjustment is associated with pressure distribution correction or not is judged, and if the pressure cannot be recovered to be normal after angle adjustment, a pressure auxiliary adjustment strategy is synchronously started in the propelling angle correction process; after the propelling angle and the contact pressure return to the balance state again, self-adaptive propelling stability control is executed; the method has the advantage that the installation and maintenance efficiency is improved.

A relay includes a first contact portion, a second contact portion, and a driving portion. The first contact part comprises a first movable contact spring, and a first movable contact, a first stress piece and a second stress piece which are arranged on the first movable contact spring. The second contact portion includes a first stationary contact. The driving part is provided with a first driving piece, and the first driving piece is located on the side, opposite to the first static contact, of the first movable contact spring and is configured to push the first stress piece to move so that the first movable contact can make contact with the first static contact and pull the second stress piece to move so that the first movable contact can be separated from the first static contact. The rigidity of the first stress piece is smaller than that of the second stress piece, and in the process that the first driving piece pushes the first stress piece, the first stress piece can deform to provide contact pressure for the first movable contact and the first static contact.

The invention discloses a response test method and device for soil layer deformation and tunnel stress in foundation pit excavation, and relates to the technical field of underground engineering tests. The method comprises the following steps: acquiring engineering geology and tunnel structure parameters, and constructing a geological tunnel coupling similarity model embedded with a layered sensing array; step-by-step excavation is adopted to simulate foundation pit construction, and soil layer displacement strain, tunnel stress contact pressure and excavation disturbance parameters are synchronously collected through multiple channels; constructing a deformation stress coupling prediction model and an excavation disturbance quantification model; and constructing a dynamic coupling response model based on the two, and outputting a dynamic coupling curve of soil layer deformation and tunnel stress. The device comprises a model box body, a data processing host and a display terminal, a layered sensing array, a dynamic loading device, a servo excavation mechanism and a multi-channel data acquisition instrument are arranged in the box body, and the whole test process integrated operation can be realized. According to the method, the dynamic coupling rule can be accurately captured, and technical support is provided for safety assessment and parameter optimization of underground engineering construction.