532 results about "Radial displacement" patented technology

The invention relates to the technical field of motor manufacturing and detection, and discloses motor rotating shaft concentricity inspection equipment which comprises a supporting mechanism, a rotation driving mechanism, a detection sensor group, a data processing unit and an output unit. The detection sensor group comprises at least two displacement sensors arranged at intervals along the radial direction of the rotating shaft and at least one angle sensor used for acquiring the rotating angle of the rotating shaft; the data processing unit constructs a three-dimensional space motion trail model of the rotating shaft in the rotating process according to angle position data collected by the angle sensor in real time and radial displacement data collected by the displacement sensor in real time so as to determine concentricity parameters of the rotating shaft; the rotation driving mechanism is electrically connected with the data processing unit and controlled by the data processing unit to drive the rotating shaft to rotate at a constant speed at a preset rotating speed, and the data processing unit transmits concentricity parameters to the output unit to be displayed or stored. The defects of a traditional detection method in the aspects of precision, efficiency and intelligence are overcome.

The invention particularly relates to a grinding force closed-loop control and flutter suppression system for crankshaft variable stiffness machining, and aims to solve the problems of unstable grinding force, flutter and surface defects caused by time-varying stiffness characteristics of a crankshaft due to a multi-crank throw and cantilever supporting structure. The system comprises a grinding force detection module, a control module and an execution module. The grinding force detection module is arranged in a grinding wheel and crankshaft contact area and collects grinding force signals in real time. The control module receives an actual grinding force signal, compares the actual grinding force signal with a target value, and outputs a compensation instruction and a suppression instruction; the compensation instruction is generated by adopting a self-adaptive PID or fuzzy PID algorithm based on force deviation, and the grinding wheel feeding speed or the main shaft rotating speed is dynamically adjusted to stabilize the grinding force; and extracting a high-frequency component of the force signal as a flutter feature, identifying a flutter bud through time-frequency analysis, and generating an anti-phase displacement instruction to suppress flutter. The execution module adjusts feeding or rotating speed according to the compensation instruction and adjusts radial displacement of the crankshaft or the grinding wheel according to the suppression instruction.

The invention provides a wafer back surface and edge detection device which comprises a base, and a rotary lifting module, a clamping lifting module, a motion direction conversion module and a visual detection module which are mounted on the base, the rotary lifting module comprises a rotary mechanism and a lifting mechanism; a supporting part for placing a wafer is arranged in the lifting mechanism, and the lifting mechanism is configured to jack the wafer up / down to a working position; the rotating mechanism is configured to provide a circumferential direction movement trend for the movement direction conversion module; the motion direction conversion module is arranged above the rotary lifting module and the clamping lifting module, and is driven by the clamping lifting module to realize displacement in the vertical direction, and the lifting motion of the clamping lifting module is converted into radial displacement of the motion direction conversion module; and the visual detection module comprises a camera unit, the camera unit faces the wafer, and the visual detection module is configured to perform image acquisition and detection on the wafer.

The invention relates to the technical field of maglev motor dynamics and control, and discloses a bearingless asynchronous motor multi-frequency harmonic vibration cooperative suppression method, which comprises the following steps: acquiring radial displacement signals and mechanical angular velocity of a rotor in an x axis and a y axis under a stator fixed coordinate system, and stacking double-axis displacement signals into an observation vector; calculating a weighting coefficient of the normalized residual error through a Huber robust cost function, and outputting the amplitude, the phase and the confidence of each order of harmonic wave; estimating the total disturbance of the system by using a linear extended state observer with harmonic energy injection, wherein the total disturbance is obtained by weighted summation according to the confidence, order and mechanical angular velocity of each order of harmonic; calculating a feedback control force according to the total disturbance estimated value, and superposing the feedforward compensation force and the feedback control force to generate a total suspension force instruction; and according to the total suspension force instruction, inversely calculating a suspension winding current reference value and outputting a control instruction. According to the invention, a mutually complementary cooperative suppression mechanism is formed, and the suppression precision of multi-frequency vibration is improved.

The invention relates to the technical field of energy transmission, and discloses a method for judging a failure mode of a cylinder of pressure-bearing equipment under an external explosion load, which comprises the following steps of: acquiring design parameters of the pressure-bearing equipment and parameters of the external explosion load; establishing a dynamic response numerical model of the pressure-bearing equipment under the explosive load; n data points are arranged in the axial direction of the cylinder body; calculating a dimensionless distance of each data point; constructing a three-dimensional data matrix containing normalized radial displacement, time and dimensionless distance; determining a critical dimensionless distance; drawing a contour map of normalized radial displacement; and judging whether the failure mode is dynamic buckling or plastic sinking deformation through discriminant function calculation. According to the judgment method, the two failure modes of dynamic buckling and plastic sinking deformation of the pressure-bearing equipment cylinder can be effectively distinguished according to the judgment function, the method is simple and visual, the complexity of a traditional analysis method can be overcome, and the judgment result can directly guide design optimization of an anti-explosion structure of the pressure-bearing equipment; and a targeted protection basis is provided for an explosion extreme load working condition.

The invention discloses a flexible riser vibration response characteristic analysis method, and relates to the technical field of ocean engineering. According to the method, a flexible riser vibration model is established based on a vibration theoretical model and a fluid control equation for vibration analysis, a theoretical time domain response curve of the flexible riser is obtained through MATLAB calculation, and then a flexible riser three-dimensional simulation model is established in an ANSYS Workbench integrated simulation platform. According to the method, a flexible riser three-dimensional simulation model is constructed, material constitutive parameters, boundary conditions and load application of the flexible riser three-dimensional simulation model are configured, then simulation is performed in an ANSYS Workbench integrated simulation platform by using the flexible riser three-dimensional simulation model, bidirectional fluid-solid coupling analysis is performed by coupling a Fluent flow field system and a Transient Stratum module, the radial displacement time history of the flexible riser under a preset working condition is obtained, and the radial displacement time history of the flexible riser under the preset working condition is calculated. And extracting resonance characteristics of the flexible riser. According to the method, the vibration response characteristics of the deep-sea flexible riser under the influence of internal and external fluids in the service process are accurately obtained, and a foundation is laid for guiding the structural stability of a deep-sea operation system.

The invention discloses a brush wire rigidity detection device for an aero-engine brush seal, belongs to the technical field of aero-engine seal part testing devices, and solves the problem of accurate detection of the brush wire rigidity of the brush seal. Comprising a high-precision annular base (with a sliding rail), a three-axis displacement adjustable sliding block assembly and a bimodal displacement monitoring system composed of a high-speed microscopic vision acquisition module and an infrared laser displacement sensing device. A high-pressure sealed cabin is arranged on the periphery of the base, an intelligent pressure applying mechanism based on the cam-sliding block principle is arranged in the center of the base, a servo motor drives a cam disc to convert rotary motion into high-precision radial displacement, and a force sensing module and a safety gap are integrated to form pressure closed-loop control. The sample fixing device is compatible with samples with different diameters through adjustment of an electrodeless light ring, and a high-frequency vibration exciter simulates a working environment. Force is applied through the pressure applying mechanism, displacement is monitored through the bimodal system, and the rigidity of the brush wire is accurately measured.

The invention discloses a dynamic seal leakage characteristic test device, which comprises a shell, end covers, a rotating shaft, two turntables, a radial displacement adjusting structure, a temperature sensor, a pressure sensor and a flowmeter, and is characterized in that the end covers are cooperatively installed at two ends of the shell and then cooperatively installed on the rotating shaft, the middle part of the shell is provided with an air inlet, the end covers are provided with air outlets, and the number of the turntables is two; the two rotating discs are installed on the periphery of the rotating shaft in a spaced mode and located on the two sides of the air inlet, the peripheries of the rotating discs and the inner periphery of the shell form an annular cavity used for installing a dynamic seal test piece, and the radial displacement adjusting structure is connected with the shell and used for driving the shell to move in the radial direction of the rotating shaft. And the temperature sensor, the pressure sensor and the flowmeter are respectively used for monitoring the temperature and the pressure at the air inlet and the air flow at the air outlet. The dynamic seal leakage characteristic test device can measure the leakage rate of the brush seal under the conditions of different pressure differences, different temperatures and different rotating speeds, and can simulate the radial interference working condition under the impact of a large load.

The invention relates to the technical field of nickel alloy pipe water pressure detection, and discloses a thin-wall nickel alloy pipe inner wall water pressure test detection system and method. The method comprises the steps that a closed water pressure environment is established in a pipe, a preset pressure gradient is applied, and pipe wall deformation response data are collected through a distributed sensing array; and generating a composite feature matrix containing axial strain, circumferential stress and radial displacement features through multi-dimensional feature extraction, inputting the composite feature matrix into a material performance degradation evaluation model, and simulating microstructure change to output a potential defect distribution map. Dynamically adjusting the water pressure gradient and the pressure maintaining time according to the map, executing a secondary water pressure test, and capturing a microscopic deformation sequence image through high-frequency imaging; comparing the image with a model prediction result identification deviation value, and iteratively updating a model parameter to optimize a detection threshold value; the test is completed by optimizing the threshold value, qualified pipe section marks and defective pipe section positioning coordinates are output, and the comprehensiveness and accuracy of thin-wall nickel alloy pipe inner wall defect detection are improved.

The invention relates to the technical field of nuclear fusion, and provides a supporting structure and a nuclear fusion device. The supporting structure comprises a first connecting assembly, a second connecting assembly, a first supporting assembly and a second supporting assembly. The first connecting assembly is connected with a lower window of the vacuum chamber; the second connecting assembly is connected with the fixed foundation; the first supporting assembly is supported between the first connecting assembly and the second connecting assembly, the first supporting assembly comprises two sets of hinge structures, and the two sets of hinge structures are arranged side by side in the radial direction of the vacuum chamber and are configured into different specifications; the second supporting assembly is supported between the first connecting assembly and the second connecting assembly and comprises two sets of elastic plate arrays, and the two sets of elastic plate arrays are arranged on the two sides of the first supporting assembly in the radial direction of the vacuum chamber. The supporting structure disclosed by the invention not only can stably bear the load of the vacuum chamber in the vertical direction, but also allows the vacuum chamber to generate smaller radial displacement due to baking, and can play a role in stably supporting the vacuum chamber.

The invention discloses a differential mechanism and a vehicle, and relates to the field of new energy automobiles, the differential mechanism comprises a main reduction gear and a straight-line-shaped shaft, an inner hole of the main reduction gear is provided with two opposite seam allowances, each end of the straight-line-shaped shaft is provided with a transmission assembly, and each transmission assembly comprises a planetary gear and a cushion block which are sequentially connected to the end of the straight-line-shaped shaft in a sleeving mode; a through hole is formed in the center of the cushion block, the end of the linear shaft extends out of the cushion block through the through hole, the part, extending out of the cushion block, of one end of the linear shaft is clamped and pressed on one seam allowance, the other end of the linear shaft is clamped and pressed on the other seam allowance, and the face, away from the planetary gear, of the cushion block is fixedly connected with the seam allowances. Wherein the middle of the straight shaft is sleeved with a supporting seat, the two ends of the supporting seat are sleeved with half-axle gears, the half-axle gears are meshed with the planetary gears, and bearings are arranged outside the half-axle gears in a sleeving mode. Through close fit of the cushion blocks and the spigots, it is ensured that the planetary gears cannot generate too large radial displacement when transmitting torque, and the shell-free differential mechanism is achieved.

The invention provides a winding type integrated forming method for a prefabricated small box girder reinforcing steel bar component. The winding type integrated forming method comprises the steps that S1, the structural design of the reinforcing steel bar component is conducted; S2, equipment arrangement is conducted; s3, longitudinal bar material distribution in inner bar manufacturing; s4, inner rib winding manufacturing; s5, mounting a corrugated pipe; S6, manufacturing outer ribs; s7, assembling the steel bar component; and S8, forming the reinforcing steel bar component. The inner ribs and the outer ribs of the whole structure are integrally formed in a winding mode, a double-layer closed-loop combined longitudinal rib connection three-dimensional structure is formed, the structure is closed, the compressive strength of a component can be improved, and the local collapse risk is avoided. The longitudinally-wound steel bars can restrain radial deviation of the longitudinal bars, and the stability is improved by being matched with supporting of the inner bars. When the inner rib and the outer rib are welded, the longitudinal ribs are stretched while rotating, the longitudinally wound steel bars are welded with the longitudinal ribs, point-by-point welding is not needed, only the wound steel bars are welded with the longitudinal ribs, and compared with closed stirrups manufactured in an existing manufacturing mode, the welding workload is greatly reduced, and meanwhile strength loss caused by welding breakpoints is avoided.

The invention discloses a full-circumference self-adaptive anchoring oil well drilling liner hanger, and belongs to the technical field of drilling liner hangers, the full-circumference self-adaptive anchoring oil well drilling liner hanger comprises an outer cylinder, a sleeve is arranged at the bottom of the outer cylinder, a connecting cylinder is arranged at the top of the outer cylinder, a plurality of through grooves are formed in the connecting cylinder, and mounting blocks are slidably arranged in the through grooves; a slip is mounted on the mounting block, and a convex block is mounted outside the slip; one-way linear motion of the connecting frame is converted into synchronous radial expansion motion of the multiple sets of slips through the driving assembly, the slips slide in the through grooves through the mounting blocks, the radial displacement of the slips is determined by the motion stroke of the driving assembly, and the device can effectively adapt to tail pipes with different diameters within a certain range; the universality and field applicability of the tool are improved, a first electric telescopic machine drives a locking pin to be inserted into a locking hole in a vertical plate, the positions of a first moving block and a second moving block can be mechanically locked, and then the whole driving assembly and the slip are fixed.

The invention provides a dense pre-support structure thin shell mechanical modeling method, and relates to the technical field of tunnel engineering soft stratum pre-support structure mechanical modeling, and the method comprises the steps: calculating the equivalent stiffness of a pipe shed-jet grouting pile composite layer based on a Voigt theory; establishing a continuous thin shell model taking the control equation as a core; constructing a plastic / elastic disturbance partition in front of the tunnel face and a four-section type boundary condition of a supporting structure through a Pasternak foundation model; and solving the constructed continuous thin shell mechanical model through a finite difference method to obtain radial displacement, and completing mechanical modeling of the tunnel engineering soft stratum pre-supporting structure. The continuous thin shell model designed by the invention can provide high-reliability theoretical support for tunnel pre-support design.

The invention discloses a global horizontal displacement monitoring method for an arch dam. The global horizontal displacement monitoring method comprises the step of calculating global horizontal displacement of the arch dam through arch end vector displacement obtained through an arch ring of the arch dam and linear displacement of strain of any point of the arch ring of the arch dam. The linear displacement of any point is calculated through the strain distribution of the full length of the arch ring of the arch dam; arranging inverted pendants at two ends of the arch dam arch ring to obtain arch end vector displacement; the position of any point after deformation is obtained according to the fact that the macroscopic shape of the arch dam is unchanged and continuous, vector displacement can be obtained and further decomposed into radial displacement and tangential displacement, and then monitoring of the global horizontal displacement of the arch dam is achieved.

The utility model discloses a photoelectric platform stabilizing device, the utility model relates to photoelectric platform technical field, including base, the middle part fixedly connected with fixed block in the base inner wall, the fixed block inner wall fixedly connected with first motor, the output end transmission of first motor has the rotary disc, the upper surface fixedly connected with stabilizing device of rotary disc. This photoelectric platform stabilizing device, through setting stabilizing device, positive and negative toothed rod cooperation limiting rod drive clamping stable frame synchronous relative motion can realize even clamping to different size photoelectric equipment, avoid equipment to shake, the cover plate further prevents equipment from falling off, ensure that the equipment is fixed in the position in the working process, when the first motor drives the rotary disc to rotate, the limiting ring on fixed plate and the limiting block under rotary disc accurate adaptation, limit the radial displacement of rotary disc, reduce the shake, guarantee the stability when azimuth adjustment.

The invention relates to a double-station welding robot which comprises a robot unit and a workpiece fixing unit and is used for welding a pipeline and flange plates at the two ends. Two welding devices are arranged on a connecting plate of the robot unit at intervals, a fixed rack and a movable rack of the workpiece fixing unit are each provided with a claw disc assembly, a double-station clamping structure is formed, two sets of workpieces can be synchronously clamped and welded, waiting for completion of a single set is not needed, and the idle time and the production period of equipment are greatly shortened. The movable rack can slide along the linear sliding table seat to adapt to pipelines with different lengths, so that the operation continuity is guaranteed; the clamping assembly is of a double-positioning structure of an inner diameter supporting block and an outer diameter pressing block, three sets of grippers are evenly distributed along the circumference of a claw disc, the driving device can drive the supporting block to externally support the inner wall of a pipeline and drive the pressing block to internally press the outer wall of a flange disc, a workpiece is synchronously positioned and fixed, radial displacement and circumferential rotation are effectively limited, and coaxiality and assembly precision are guaranteed. Welding defects caused by loose clamping are avoided, the quality and the qualified rate of joints are improved, and it is ensured that workpieces meet the sealing and strength requirements.

The invention relates to the technical field of gear machining, in particular to an anti-disengaging clamp for gear manufacturing. Comprising an operation table, the operation table is in sliding connection with symmetrically-distributed sliding frames, the operation table is provided with a first power module for driving the symmetrically-distributed sliding frames to move, the sliding frames are rotationally connected with rotating shafts, and the operation table is provided with a second power module for driving the symmetrically-distributed rotating shafts to rotate. The rotating shaft is fixedly connected with pressure discs, the symmetrically distributed pressure discs are used for clamping a straight gear, the outer side of one pressure disc is fixedly connected with a first notch circular ring, the first notch circular ring is provided with uniformly distributed rectangular grooves, and the rectangular grooves are slidably connected with limiting plates. The spur gear is preliminarily clamped through the pressure disc, the limiting plate and the pressurizing plate are clamped between adjacent teeth of the spur gear, the spur gear is prevented from sliding relative to the pressure disc, and effective constraint on radial displacement and circumferential rotation of the spur gear is increased.

The utility model discloses a plunger adjusting assembly and a plunger pump, and relates to the technical field of plungers. According to the main technical scheme, a mounting groove is formed in a sliding block; the boss structure is attached to the bottom of the mounting groove, a first gap is formed between the boss structure and the wall of the mounting groove, and the first gap is used for reserving a space for the boss structure to move in the radial direction of the mounting groove; the plunger rod is connected to the end, away from the bottom of the mounting groove, of the boss structure. The plunger rod is sleeved with the pressing piece, a second gap is formed between the pressing piece and the plunger rod, and the second gap is used for reserving a space for the plunger rod to move in the radial direction of the pressing piece; the pressing piece is connected to the sliding block and attached to the boss structure. The purposes of adjusting the coaxiality of the plunger rod and the cylinder body, reducing the abrasion risk of the plunger rod, prolonging the service life of the plunger rod and improving the normal use probability of the plunger pump are expected to be achieved. And meanwhile, in the displacement process of the plunger rod, the coaxiality between the plunger rod and the sliding block is effectively ensured, and then the aims of reducing the risks of inclination, bending, breakage and abrasion of the plunger rod are achieved.

The invention provides a device for removing a friction welding seam of a pipe fitting, and belongs to the technical field of metal pipe machining, the device comprises a workbench and a positioning mechanism arranged in the middle of the workbench, and the positioning mechanism is used for bearing and positioning a metal pipe; two punching bases which are symmetrically arranged left and right are transversely and slidably connected to the workbench, first air cylinders used for driving the punching bases to transversely move are arranged at the left end and the right end of the workbench correspondingly, annular punches are arranged on the opposite inner side faces of the two punching bases correspondingly, and cutter supporting rings are rotationally connected to the interiors of the two punching bases correspondingly. A cutter supporting ring is arranged on the punching base, a plurality of cutters are slidably connected to the cutter supporting ring in the radial direction, a cutter feeding assembly used for driving the cutters to move in the radial direction of the cutter supporting ring is arranged between the punching base and the cutter supporting ring, and a driving piece is arranged on the punching base and can drive the cutter supporting ring and the cutters to rotate and complete the annular cutting action on the metal pipe; the possibility that the surface quality of the metal pipe is damaged in the weld joint removing process can be reduced.

This invention relates to the field of gearbox testing technology, specifically disclosing a reliability testing device and method for a wind turbine yaw gearbox. The device includes a connecting mechanism, with a first testing mechanism and a second testing mechanism arranged on the outer side of the connecting mechanism to simulate the swaying and pushing of wind turbine blades. The invention uses the first testing mechanism, arranged in a ring array, to apply force to the rotating shaft radially, causing radial displacement of the shaft. This simulates the force exerted by the wind turbine blades on the gearbox when subjected to lateral wind force, closely reflecting the actual stress conditions of the wind turbine gearbox and improving the realism of the test. This facilitates a more thorough testing of the wind turbine gearbox's reliability. The second testing mechanism simulates the force exerted by the wind turbine blades on the gearbox when subjected to direct wind force, further improving the realism of the test.

The invention relates to the technical field of mining, in particular to a continuous drilling device for mining, which comprises a base, a crawler walking mechanism, a protective shell, a mining cutterhead, a transmission mechanism, an adjusting mechanism and a linkage control mechanism, the crawler walking mechanism is arranged at the bottom of the base, and the protective shell is arranged at the top of the base; one side of the base is connected with a mining cutter head used for mining a gold mine, the transmission mechanism is used for driving the mining cutter head to rotate, a worm and a worm wheel are meshed and linked, and through the synergistic effect of a connecting rod structure, a sliding block can drive the mining cutter head to move in a guide frame, and real-time adjustment of radial displacement of the mining cutter head is achieved. The path deviation can be corrected without shutdown, the transmission structure can bear high-frequency angle adjustment under heavy-load torque, an additional power source is not needed, the transmission structure is economical and efficient, linkage of the connecting rod assembly and the worm gear is controlled in real time through the linkage control mechanism, and rapid decoupling of the worm gear and the connecting rod structure is achieved.

The invention discloses an aluminum alloy grain refinement production device and method, and relates to the technical field of aluminum alloy machining, the aluminum alloy grain refinement production device comprises a case, a right wire frame fixed at the right side position in the case, an unwinding shaft rotatably mounted in the right wire frame, and a Z-axis wire pressing stabilizing mechanism mounted in the right wire frame above the unwinding shaft; a Z-axis wire supporting mechanism is installed in the machine box on the left side of the unwinding shaft, and a wire feeding disc is installed at one end of the surface of the unwinding shaft in a bolted mode. According to the device, the unwinding shaft fixing mechanism, the wire pressing stabilizing mechanism, the wire supporting and supporting mechanism, the multiple lifting assemblies and the double-shaft straightening structure are reasonably arranged, a synchronous driving mechanism is combined, the radial displacement problem of the aluminum-titanium-boron grain refining wire in the wire feeding process is solved, preheating and heating uniformity and activity release of a grain refiner are guaranteed, and the yield of the aluminum-titanium-boron grain refining wire is improved. And the dispersion effect of the grain refiner in the molten aluminum is also improved, and finally refining and performance improvement of cast ingot structures are promoted.

This utility model proposes a coaxial adjustment structure for a five-axis rotary table, comprising: a swing arm assembly rotatably connected to the middle working end; a support structure for the rotating shafts on both sides of the swing arm assembly; and clearance adjustment components circumferentially distributed on the mating surfaces of the mounting housing and the rotating shafts. Each clearance adjustment component includes at least two radially displaceable top-fitting adjustment mechanisms. Each top-fitting adjustment mechanism includes an adjustment channel penetrating the mounting housing and a top-fitting mechanism. The working end face of the top-fitting mechanism contacts the outer surface of the rotating shaft. By changing the axial displacement of the top-fitting mechanism, the radial mating clearance between the rotating shaft and the mounting housing is altered, making the swing arm assemblies on both sides of the middle working end concentric. This circumferential multi-point coordinated adjustment mechanism improves the coaxiality adjustment accuracy to ±0.002mm, effectively controlling radial runout at the working end. Through the standardized adjustment channel and top-fitting mechanism design, a single person can complete the clearance reset within minutes, making it particularly suitable for rapid calibration during mass production.

The utility model provides a pipe clamping device which comprises the components of a support which is provided with a clamping groove, the width of the clamping groove from a groove opening to a groove bottom is gradually reduced, and the clamping groove is used for placing a pipeline; and the pressing rod assembly is movably installed on the support, a pressing block is arranged on the pressing rod assembly, and the pressing rod assembly can be adjusted and fixed to the position where the pressing block tightly presses the pipeline in the clamping groove in the vertical direction. Axial and radial displacement of the pipeline is restrained through vertical pressure of the pressing block. And by adjusting the size of the clamping groove, the device can be suitable for pipelines with different pipe diameters. Meanwhile, the pipeline clamp is made of common light metal plates, and compared with an original cast iron pipeline clamp, the pipeline clamp is easier to maintain, lower in weight, capable of being disassembled and assembled manually and flexible to use.

The utility model provides a linear electric push rod directly driven by a motor, which comprises a shell, a motor, a screw rod and a telescopic rod, the motor, the screw rod and the telescopic rod are coaxially arranged, and the output shaft of the motor and the near end of the screw rod are circumferentially fixed and axially limited through a rotation constraint structure; the near end of the telescopic rod is provided with an internal threaded hole, the internal threaded hole and external threads of the lead screw form a lead screw pair, the far end of the telescopic rod extends out of the shell and is provided with a second connecting piece, and when the motor directly drives the lead screw to rotate, the lead screw pair converts rotary motion into axial linear motion of the telescopic rod. The telescopic rod and a guide sliding groove in the inner wall of the shell form a sliding pair through an annular flange, and a limiting flange is further arranged at the far end to restrain radial displacement. The linear type electric push rod directly driven by the motor is compact in overall design structure and high in transmission efficiency, achieves high-precision linear motion through combination of direct drive and a lead screw pair, is suitable for connection of executing mechanisms needing stable push-pull force, and is wide in application scene.

A driving device and an electric vehicle relate to the technical field of power assembly torque detection, a shell of the driving device comprises a groove, a torque sensor is fixed on the inner wall of the groove, the shell comprises another groove, and the other groove is used for accommodating a bearing. One through hole is used for penetrating through the bottoms of one groove and the other groove in the axial direction of the driving device, one end of one transmission shaft of the generator, the driving motor and the speed reducer penetrates through the through hole, and the torque sensor and the bearing surround the same end of the transmission shaft. In the embodiment, the same end of the transmission shaft provided with the bearing is provided with the torque sensor, the torque sensor detects the torque of the transmission shaft around the transmission shaft, the bearing is supported between the inner wall of the shell and the transmission shaft, radial displacement of the transmission shaft is reduced, shaking of one end of the transmission shaft is slowed down, and torque detection is prevented from being affected by radial movement of the transmission shaft. The stability and accuracy of the torque sensor on the torque detection of the transmission shaft are improved.

The invention relates to the technical field of oil fume purification, in particular to a magnetic suspension bearing motor for an oil fume purification device and the oil fume purification device.The magnetic suspension bearing motor comprises a rotating shaft, a radial magnetic bearing unit, a radial sensor and a control system.The rotating shaft is used for being connected with an impeller of the oil fume purification device; the radial magnetic bearing unit comprises a radial rotor and a radial stator, the radial rotor sleeves the rotating shaft, the radial stator is located on the radial outer side of the radial rotor, and the radial stator comprises a first coil winding arranged in the circumferential direction of the radial stator; the radial sensor corresponds to the rotating shaft and is used for acquiring radial displacement of the rotating shaft and generating a radial displacement signal; the control system is electrically connected with the radial sensor and the first coil winding so as to adjust the current of the first coil winding according to the radial displacement signal, so that the electromagnetic acting force at any position between the radial stator and the radial rotor in the circumferential direction is changed, maintenance of dynamic balance of the motor is achieved, and normal operation of the motor is guaranteed.

The invention relates to the technical field of pipeline structures, in particular to a pipeline socket with a water stop wing, comprising: a pipeline fitting, which comprises a pipe fitting body, one end of the pipe fitting body is provided with an insertion pipe, and the other end of the pipe fitting body is provided with an annular socket; the butt joint fittings are used for connecting the adjacent pipeline fittings; and the reinforcing accessory is arranged on the outer wall of the pipe fitting body. A traditional rigid and integrally-formed water stop ring is divided into a plurality of water stop wing pieces which are independently arranged in the socket guide groove in a surrounding mode, the water stop wing pieces are installed in a hinged mode through the hinge shaft bases, elastic supporting is provided through the springs, and therefore each water stop wing plate can independently conduct small-amplitude self-adaptive deflection relative to the pipe body; the problem that stress concentration is generated at the root of the water stop structure when radial displacement or angular deflection occurs at the pipeline connecting position is fundamentally solved, the risk that the pipe body cracks is remarkably reduced, and the structural safety and durability of a connector under the complex working condition are greatly improved.

The invention discloses a high-speed heavy-load working condition bearing dynamic stiffness testing device and testing method, and relates to the field of bearing testing. The invention solves the problems that the existing bearing dynamic stiffness test technology and equipment only can load in a single direction, cannot simulate axial and radial composite loading, depends on contact transmission, is insufficient in heavy load bearing, lacks system vibration error suppression measures, and is poor in reliability. And the high-precision test requirement of the independent rolling bearing under the high-speed heavy-load composite working condition is difficult to meet. A shafting supporting module is arranged on the upper portion of a test bench support, a measuring module is located over the shafting supporting module, an axial loading module and a radial loading module apply axial force and radial force to a tested bearing respectively, and a driving module drives a supporting shaft and an inner ring of the tested bearing to rotate. Axial and radial composite loading under the high-speed heavy-load working condition can be achieved, axial and radial displacement can be monitored synchronously, system errors are reduced, and high-precision measurement of the dynamic stiffness of the bearing is achieved.