1229 results about "Axial pressure" patented technology

The invention relates to the technical field of data acquisition and data analysis, in particular to a hydraulic fracturing test crack propagation monitoring system which comprises a monitoring system and is used for monitoring crack propagation behaviors in the hydraulic fracturing process in real time. Constant or dynamically changing confining pressure and axial pressure are provided; the pore pressure dynamic regulation and control unit is used for accurately controlling the injection pressure, flow and saturation of fracturing fluid and simulating fracture propagation behaviors under different seepage conditions; the multi-physics field sensing monitoring network unit is used for collecting strain, sound wave signals and a surface displacement field in the crack expansion process in real time; full-scale monitoring of rock fracture propagation is realized, an influence mechanism of pore pressure and time effect on fracture evolution is disclosed, an accurate prediction means is provided for shale gas development and deep engineering, and the fracturing effect and engineering safety are remarkably improved.

The invention discloses a rock multi-field coupling test system and a damage evaluation and prediction method thereof, belongs to the technical field of geotechnical engineering and geomechanics experiments, and solves the problem that the rock state under the multi-field coupling condition cannot be monitored in real time in the prior art. The system comprises a multi-physics field coupling loading system, a multi-field data monitoring system and a multi-field data acquisition system. The system can simulate and apply axial pressure, confining pressure, pore pressure and temperature of an in-situ environment to a rock sample, integrates an acoustic monitoring system, a deformation monitoring system and a CT scanning system to realize multi-dimensional real-time monitoring of rock sample damage, overcomes the limitation of a single monitoring method, realizes multi-system electrical connection by taking an upper computer as a data acquisition center, and realizes multi-dimensional monitoring of rock sample damage. And a multi-parameter model is constructed by fusing sound waves, deformation and CT data, so that the whole-process quantitative evaluation from microcrack initiation to macroscopic fracture is realized, and the damage evaluation is comprehensively performed.

An ultra-deep carbonate rock dissolution simulation experiment device and method. The experiment device comprises: at least two reaction kettles (1) arranged in series connection, the reaction kettles (1) each comprising a confining pressure mechanism (10) and an axial pressure mechanism (20), wherein the confining pressure mechanism (10) is provided with a rock core cavity for accommodating a rock core (2) and can apply confining pressure to the rock core (2), the axial pressure mechanism (20) is used for applying axial pressure to the rock core (2) in the rock core cavity, and the axial pressure mechanism (20) is provided with a reaction solution interface communicating with the rock core cavity; a solution pressure vessel system (40), capable of providing a reaction solution and injecting the reaction solution into the rock core cavities by means of the reaction solution interfaces; at least two back pressure control devices (30), outlet ends of the rock core cavities of the reaction kettles (1) being connected to the back pressure control devices (30); and a detection system (50). The rock core cavities of the reaction kettles (1) are in series connection, and the reaction solution provided by the solution pressure vessel system (40) can sequentially flow through the rock core cavities in series connection, and the detection system (50) is used for separately performing detection on each rock core cavity, thereby solving the technical problem of the difficulty in conducting simulation experiments with respect to the dissolution of strongly altered carbonate rocks in ten-thousand-meter ultra-deep conditions.

The invention relates to the technical field of spinning machines, in particular to a spinning machine precision control method suitable for a high-temperature working condition, and the method comprises the following steps: collecting multi-source information; establishing a mapping relation between the thermal error and the temperature field to obtain a thermal error prediction model, training and correcting the thermal error prediction model, and outputting a real-time thermal error prediction value; generating a comprehensive position compensation instruction and performing position compensation; the pressure feedback value collected in real time is compared with a corresponding preset threshold value, if the pressure feedback value collected in real time is larger than or equal to the corresponding preset threshold value, the comprehensive position compensation instruction is converted into a force control instruction, and if the actual axial pressure feedback value or the actual radial pressure feedback value is smaller than the corresponding preset threshold value in the force control process, the comprehensive position compensation instruction is converted into the force control instruction. If yes, returning to the position compensation mode. According to the method provided by the invention, comprehensive compensation and active inhibition of thermally induced errors can be realized, and the forming precision of high-temperature spinning and the surface smoothness of a workpiece are remarkably improved.

The invention discloses a fracturing sealing device and method based on injecting supercritical CO2 into basalt. The fracturing and sealing device comprises: a test main body module comprising a basalt sample; the injection module is used for injecting required gas, liquid or gas-liquid mixture into the test main body module; the pressure loading module is communicated with the test main body and is used for applying axial pressure and / or confining pressure to the test main body module; wherein the injection module and the pressure loading module are configured to realize the fracturing of the basalt sample, the radial permeability of the fractured basalt sample and the storage of CO2 by the fractured basalt sample. The use limitation that a traditional indoor test device is single in function can be overcome, and comprehensive understanding of the fracturing sealing process under the complex stratum environment condition can be achieved; and the formation rule of the crack net caused by basalt can be analyzed conveniently, the permeability of the crack net can be evaluated, and the feasibility and effectiveness of mineralizing and sealing CO2 by basalt in different injection modes can be compared.

The invention relates to the technical field of oil exploitation, and discloses a device for simulating hydraulic fracturing to reform a shale reservoir under limited temperature and pressure, the device comprises a bottom plate, an auxiliary feeding mechanism is arranged on the bottom plate, the auxiliary feeding mechanism is used for auxiliary feeding, the bottom plate is connected with a jacking mechanism, and the jacking mechanism is used for jacking the bottom plate. The jacking mechanism is used for jacking and applying external pressure, the auxiliary feeding mechanism is connected with a vibration diffusion mechanism, and transformation modes of the shale reservoir under different pressure conditions can be accurately simulated by accurately controlling confining pressure, axial pressure and fluid pressure; the shale core sample is filled with the gold tube, so that the integrity of the sample can be kept under the condition of effectively transmitting confining pressure, and quantitative analysis of the sample after fracturing transformation is facilitated; after set gas components are injected into the sample bin pipe, water injection fracturing is carried out, and quantitative characterization of the fracturing process is achieved by monitoring the content of fluid produced after fracturing.

The utility model belongs to the technical field of mechanical transmission, and particularly relates to an electric cylinder with a built-in force sensor, which comprises a lead screw assembly, a force sensor assembly and a force sensor assembly, the lead screw assembly comprises a nut and a screw rod, and the nut is movably sleeved on the outer side of the screw rod; the piston rod is fixedly connected with the nut; the bearing seat is arranged on the screw rod in a sleeving mode, the front end and the rear end of the bearing seat in the axial direction are connected with first bearings correspondingly, and the first bearings are connected with the screw rod; and the force sensor is arranged on the screw rod in a sleeving manner, and the force sensor is connected with the bearing seat. The axial tension and the axial pressure from the screw rod are transmitted to the bearing seat through the two first bearings respectively, and then the tension and the pressure are transmitted to the force sensor through the bearing seat respectively, so that output of pressure signals and pressure signals is realized.

The invention relates to a differential performance detection device, which belongs to the technical field of differential detection, and comprises a detection terminal connected with the axial end face of a planetary gear; the detector is arranged opposite to the detection terminal; a displacement sensor is arranged on the surface, facing the detection terminal, of the detector; the detector is provided with the surface of the displacement sensor to abut against the detection terminal, and the axial pressure of abutting between the detector and the detection terminal is zero. The driving part is used for driving the bevel gear to rotate; the processor is connected with the displacement sensor; the moment when the driving part drives the bevel gear to rotate is the first moment, the bevel gear transmits power to the planetary gear through rotating meshing after rotating, the displacement sensor is used for detecting whether the planetary gear rotates or not, the moment when the displacement sensor feeds back signals is the second moment, and the meshing clearance is detected according to the first moment and the second moment. Whether the tooth pitch of the differential mechanism is out of tolerance or not can be judged, and the accurate positioning effect of differential mechanism fault detection is achieved.

The invention provides a sleeve material for molding an aspheric glass lens and a preparation method of the sleeve material. The method comprises the steps that 1, raw material powder is mixed and dried, tungsten carbide powder and Si3N4 powder are mixed in a ball milling tank in an inert atmosphere to obtain composite powder, and the adding amount of the Si3N4 powder is 1 wt%-15 wt%; (2) die filling; putting the composite powder into a graphite female die, and pre-pressing under the pressure of 5-20 MPa; (3) sintering is conducted, specifically, the mold is placed in an SPS system, the initial axial pressure ranges from 5 MPa to 10 MPa, vacuumizing is conducted till the pressure is 10 Pa or below, gradient heating sintering is conducted, the highest sintering temperature ranges from 1500 DEG C to 1900 DEG C, the highest sintering pressure ranges from 40 MPa to 60 MPa, and after heat preservation is finished, the mold is taken out after cooling; and (4) sampling: carrying out sand blasting treatment on the graphite on the surface of the sample to obtain the sleeve material for molding the aspheric glass lens. The material has a lower thermal expansion coefficient.

The invention discloses a concrete time-varying Poisson's ratio testing method. The method comprises the following steps: placing concrete in a preset concrete creep measuring device; after multi-axial pressure is applied to the concrete, creep data of the concrete in the pressed direction, stress data and strain data of the concrete in other directions and concrete test parameters are obtained; calculating a creep coefficient corresponding to the concrete based on the concrete test parameters; calculating the time-varying elastic modulus of the concrete in the multi-axis state based on the creep coefficient and the creep data; and calculating the time-varying Poisson's ratio corresponding to the concrete based on the time-varying elastic modulus, the creep data, the stress data and the strain data. According to the improved concrete creep measurement device and method, the Poisson's ratio of the concrete in the multi-axis stress state can be more accurately tested, the precision of the test result is improved, a research method about the change of the Poisson's ratio of the concrete along with time under the multi-axis stress is provided, and the application prospect is wide. Therefore, the safety and durability of the concrete structure are effectively guaranteed.

The invention discloses a fractured rock mass pressure-bearing deformation-seepage-grouting visual test device and method, relates to the technical field of test devices, and aims to solve the problem of grouting reinforcement of water-rich fractured rock mass in the field of underground engineering. The device comprises a base, a transparent test bin, an axial pressure chamber, an axial pressure head, a pressure plate and other key components, and can realize the pressure-bearing deformation, seepage and grouting integrated test operation of the fractured rock mass under the cyclic dynamic load condition. The ballasting and seepage phenomena are simulated by applying axial pressure and water pressure, and grouting tests at different positions are simulated through grouting. The method comprises the steps of test preparation, cyclic dynamic load test, seepage test, grouting test, test data recording and storage, pressure unloading, test device resetting and the like. The test device is simple in structure and convenient to operate, grouting reinforcement of unfavorable geologic bodies can be simulated, visualization of the test process is achieved, the slurry diffusion rule is visually reflected, and scientific basis and technical support are provided for underground engineering construction.

The invention relates to the technical field of friction stir welding, in particular to a friction stir welding temperature control method, system and equipment and a medium. The temperature control range value is calculated according to the material melting point; temperature distribution data of the advancing side, the retreating side, the stirring area core and the shaft shoulder action area are collected and divided; comparing the real-time temperature characteristic with the control range value to judge that the temperature is abnormal; calculating a stirring head rotation speed adjustment amount, an axial pressure change amount, and a welding travel speed correction value based on the abnormality determination result; when parameter adjustment is executed, torque and temperature field changes are monitored, and temperature control execution data are obtained; and finally, accurate regulation and control of the temperature field are realized through the control system. Accurate identification of temperature abnormity and accurate control of a local area are realized, and a closed-loop control mechanism based on torque monitoring is established.

The invention relates to the field of concrete testing, in particular to an eccentric compression test device and method for an FRP rib concrete column. Comprising a control system and a spring integration device, the spring integration device comprises a cover plate, a force sensor and a plurality of spring devices, the spring devices are detachably connected with the cover plate, the plurality of spring devices are arranged in an array, and the control system can perform pressure distribution adjustment on each spring device to realize an eccentric loading test on the FRP reinforced concrete column. The spring integrated device disclosed by the invention can convert the axial compression effect of a conventional axial press actuator into any required eccentric loading mode, so that the implementation of a complex eccentric loading working condition is ensured, the safety of an eccentric loading test is greatly enhanced, and the stability of the eccentric loading test is improved by accurately adjusting the rigidity in the spring device. And fine adjustment of eccentric force can be realized, so that the test precision under various complex eccentric loading test working conditions is improved.

The invention relates to the technical field of oilfield development, in particular to a reservoir supercritical carbon dioxide fracturing soaking production simulation method and device. Well cementation is simulated; fracturing simulation: placing the core sample subjected to well cementation in a core holder, applying axial pressure and confining pressure to the core sample, simulating stratum triaxial stress at a required temperature, obtaining initial experimental data of the core sample at the moment, injecting supercritical carbon dioxide into the core sample through a shaft, and obtaining experimental data during core fracturing; soaking is simulated, and the core sample enters a soaking stage after being fractured; carrying out production simulation, enabling the core sample to enter a flowback stage under a specific return pressure condition, and recording experimental data of the core sample in the flowback stage; and performing three-dimensional imaging analysis. According to the method, the spatial distribution of the crude oil after the supercritical carbon dioxide fracturing of the unconventional reservoir can be monitored in real time, and the characteristics of the cracks formed after the fracturing and the crude oil recovery capacity are quantitatively evaluated.

The invention discloses a safety type damaged state rock hydrogen permeation simulation device and method.The simulation device comprises a box body, a simulation mechanism, a hydrogen injection mechanism and an explosion-proof mechanism, and the simulation mechanism comprises a pressure box, a lower cushion block, a thermal shrinkage sleeve, an upper pressing block, an axial pressure assembly and a confining pressure assembly; and the hydrogen injection mechanism is communicated with the gas inlet hole and the gas outlet hole and is used for injecting gas with preset gas pressure and preset hydrogen concentration into the thermal shrinkable sleeve. The device has the beneficial effects that gas with preset pressure and preset hydrogen concentration is continuously injected into the rock sample in the thermal shrinkable sleeve through the hydrogen injection mechanism, the influence of different hydrogen environments on rock mechanical properties can be simulated, meanwhile, the first hydrogen concentration detection piece continuously monitors the hydrogen concentration in the box body, and if the concentration exceeds a preset safety threshold value, the hydrogen concentration is detected. And the fan is immediately started, and hydrogen in the box body is discharged to an outdoor safe area, so that explosion accidents caused by hydrogen leakage can be avoided, and the safety of an experiment process is improved.

The utility model discloses a slurry compaction performance testing device, and belongs to the field of gangue fluidization filling. The cylinder body is fixed with the base and the upper sealing cover through bolts, a filter screen, screen cloth and a screen plate are arranged at the bottom of the cylinder body, and a film sensor is arranged on the inner wall of the cylinder body and connected with a static strain gauge through a data line; the water chute is located on the base and connected to the water pipe and the drainage valve; an axial pressure inlet is positioned in the upper sealing cover and is connected with the constant-speed constant-pressure pump through a water pipe; a sealing rubber ring is arranged on the lower portion of the load transfer piston, and a cavity is formed in the load transfer piston and communicated with the pressure relief opening. During working, the constant-speed and constant-pressure pump is used for loading and stabilizing axial pressure, the film sensor, the displacement sensor and the pressure sensor can record the axial pressure, pressure measurement and strain in a slurry compaction state, and the compaction performance of fluidized slurry is tested. The device is simple in structure, has important practical significance on proportioning optimization of slurry, and plays an important role in promoting development of a gangue fluidization grouting filling technology.

The invention discloses a method and device for testing the sliding friction coefficient of rock under the true triaxial stress condition, and belongs to the field of rock parameter tests.The method comprises the steps that a rock cube to be tested is cut into two parts along the diagonal line, and rock powder of the same texture is smeared on the diagonal planes of the two cut rocks; the two parts of rocks coated with the rock powder are attached together along the diagonal planes of the rocks, and confining pressure is applied to the two opposite directions of the attached to-be-measured rock cube respectively till the confining pressure reaches the corresponding preset value; applying an axial pressure to the attached to-be-tested rock cube at a constant loading speed until the change of the axial pressure tends to zero; and calculating the sliding friction coefficient of the rock cube to be measured according to the final stable value of the axial pressure. The method can test and simulate the rock friction coefficient of a real stratum under the three-dimensional ground stress condition, and the accuracy of a test result is improved.

The invention provides a method for correcting a force thermal vibration finite element model of a reinforced thin-wall cylinder, and belongs to the technical field of vibration analysis of thin-wall cylinder structures. According to the method, firstly, simulation and test modal frequencies under different working conditions are obtained by carrying out simulation and test modal analysis on the reinforced thin-wall cylinder at different temperatures and in different axial pressure ranges; secondly, defining an objective function, a decision variable and a feasible region of an optimization problem on the basis of relative errors of modal frequencies under the same vibration mode simulation and test conditions, and performing optimization analysis on key characteristic parameters influencing the modal frequencies of the structure by using sensitivity analysis, an agent model and a sparrow search algorithm; and finally, based on the optimized key characteristic parameters, establishing a force thermal vibration finite element model of the reinforced thin-wall cylinder meeting the target precision requirement. According to the method, the problem of insufficient precision of a structural finite element model correction method under the complex working condition can be solved, and high-precision simulation analysis of the hypersonic aircraft under the complex working condition is realized.

The utility model discloses a trimming device with pressure detection, which comprises a trimmer driving unit arranged on a trimmer base; the dresser execution unit is connected with the dresser driving unit through an output shaft, can circumferentially rotate around the axis of the dresser execution unit under the driving of the dresser driving unit, and can generate axial downward pressure under the driving of the dresser base; a sensor; the dynamic force conduction unit is arranged between the sensor and the dresser execution unit, at least part of the dynamic force conduction unit is matched with the sensor and used for installing and positioning the sensor, and at least part of the dynamic force conduction unit makes contact with the dresser execution unit and the sensor so that the axial pressure of the dresser execution unit can be transmitted to the sensor; and the relative static state of the sensor is kept. Through the arrangement of the dynamic force conduction unit, the rotation action of the dresser execution unit and the downward pressing action of the dresser execution unit on the polishing pad are relatively independent, and it is ensured that the sensor can accurately feed back the downward pressing force.

Provided are a method and apparatus for calibrating contact parameters of electrode materials, and a computer storage medium. The method includes the following operations. A discrete element simulation test is performed on an electrode material based on a calibration model and calibration ranges of contact parameters of the electrode material when an axial force-displacement curve of a target pellet of the electrode material meets an adaption condition of the contact model; then a simulated axial pressure-axial strain relationship of the electrode material is acquired based on a target discrete element simulation parameter of the electrode material; whether the contact parameters are calibrated successfully is judged based on this relationship; and when the contact parameters are calibrated successfully, calibration results of the contact parameters are determined.

The utility model provides a square steel tube concrete combination column internally filled with stones. The square steel tube concrete combination column comprises a square steel tube, a concrete layer and a column core group, the column core group is coaxially arranged in the square steel tube, and the concrete layer is filled in the spare part in the square steel tube; the column core group comprises angle steel, a stone column, a batten plate group and a limiting assembly, the positioning mechanism is used for positioning the array position of the four angle steel, the integrity and the position of the column core column are ensured, the combined column can remarkably improve the axial pressure bearing capacity and the integrity, and the combined column has the advantages of being high in compressive strength, low in manufacturing cost and the like; according to the construction method, local materials are used according to the building characteristics of the Fujian area, waste stone in demolished stone structure buildings is fully utilized in the concrete-filled steel tube combination column structure, the problems of insufficient axial compression strength and bearing capacity of the concrete-filled steel tube combination column structure can be solved, the concrete consumption of a newly-built structure can be greatly reduced, and the construction cost is reduced. The method for reducing the cost and reducing the environmental pollution is a technology which is suitable for the green and sustainable development demand of the society.

The invention relates to a method for predicting shear strength of a cut-off wall slot section seam based on interface porosity, which belongs to the technical field of geotechnical engineering and comprises the following steps: 1) acquiring three-dimensional shape data of an upper interface and a lower interface of the seam through a high-precision three-dimensional scanning technology and performing coordinate correction; 2) determining the thickness zeta of the interface according to the deepest datum lines on the two sides of the interface to obtain the initial porosity n0 and the initial contact area A0 of the interface; 3) according to the distribution function of the vertical spacing s of the infinitesimal elements, obtaining a relational expression of the axial pressure and the void ratio n; (4) calculating the average weighted height # imgabs0 # of contact units of the upper interface and the lower interface of the joint; and (5) predicting the shear strength of the structural surface according to the interface porosity n and the average weighted height # imgabs1 #. According to the invention, based on the evolution process of the interface porosity, the shear strength of the cut-off wall slot section seam at two sides of the interface under different roughness can be effectively predicted, and a theoretical basis is provided for the anti-permeability performance evaluation of the cut-off wall.

The invention relates to the technical field of aluminum alloy profile processing, and particularly discloses a super-long thin-wall aluminum alloy profile anti-deformation vertical quenching method which comprises the following steps: S1, determining mechanical parameters, and obtaining the maximum equivalent buckling axial pressure P of a to-be-quenched aluminum alloy profile; s2, determining the maximum constraint length of a single section: further calculating the maximum allowable length of the single constraint section of the to-be-quenched aluminum alloy section; S3, determining a minimum constraint section; S4, carrying out solid solution quenching: equally dividing the to-be-quenched aluminum alloy section according to the minimum constraint section N, and carrying out section marking in the radial direction from the bottom to the top, the adjacent segment marking positions and the top of the sectional material are restrained and fixed; and after fixation, solid solution quenching is carried out, and after solid solution quenching is completed, the profile is taken out. The vertical quenching device is suitable for vertical quenching requirements of various ultra-long thin-wall aluminum alloy profiles with complex sections, and the profiles are effectively prevented from being deformed in the vertical quenching process.

The invention provides a high-temperature and high-pressure rock triaxial and hydraulic fracturing test system capable of loading a plurality of samples in different bins, which comprises a fracturing test bin arranged in a thermal insulation bin, a computer display, control and storage system is arranged outside the fracturing test bin, and the fracturing test bin is controlled by signals of a high-temperature heating and control system, an axial pressure loading and control system, a confining pressure loading and control system, a fracturing fluid injection pump and a control system; the computer display, control and storage system is respectively in communication connection with the high-temperature heating and control system, the axial pressure loading and control system, the confining pressure loading and control system, the fracturing fluid injection pump and control system as well as an acoustic emission monitoring system and an injection pressure monitoring system which are arranged in the fracturing test bin; the fracturing test cabins are arranged in different cabins; the system comprises a high-temperature and high-pressure triaxial test method and a high-temperature and high-pressure hydraulic fracturing test method. The device has the advantages that the test efficiency is improved, the test period is shortened, a plurality of rock core samples can be tested at the same time, and a visual contrast test can be formed.

The invention discloses a raster scanning correction method and system for an electromagnetic MEMS micromirror, and belongs to the technical field of raster scanning correction, and the method comprises the steps: collecting the real-time three-axis attitude information of an electromagnetic MEMS micromirror product in a three-dimensional space, and the fast and slow axis piezoresistive signals of the micromirror; carrying out PID control by taking the angle difference value as an error signal, outputting a driving voltage of a fast axis and a slow axis of the MEMS micro-mirror after the scanning view field correction, and further mapping to obtain a correction angle of micro-mirror scanning; and taking the correction angle as the input of PID control, and correcting the rotation angle of the micromirror by minimizing the tracking error between the rotation angle of the micromirror and the correction angle. Three-axis attitude information of an electromagnetic MEMS micro-mirror product is collected, and an angle difference value between the three-axis attitude information and standard three-axis attitude information is introduced into PID control to adjust a fast-slow axis driving signal, so that the rotation angle of the micro-mirror is corrected, and correction and compensation of grating distortion in grating scanning are realized. And the accuracy of the reconstruction quality of the three-dimensional point cloud is ensured.

The utility model relates to the technical field of detection and testing, and provides a pipe fitting torsion testing machine. The pipe fitting torsion testing machine comprises a base, a driven mechanism, a driving mechanism and a vertical loading mechanism, a groove is formed in the upper surface of the base, a sliding groove is further formed in the upper surface of the base, and the driven mechanism is connected into the groove. According to the pipe fitting torsion testing machine provided by the utility model, a torsion load loading system, an axial pressure load loading system and a transverse pressure load loading system are highly integrated, so that torsion, axial and bending three-axis composite loading can be realized on single equipment unprecedentedly; the real stress environment of pipe fittings such as geological drill rods under extreme working conditions is reproduced to the maximum extent, compared with a traditional single-axis or two-dimensional loading test, the test result can more accurately predict the actual service performance and failure mode of the pipe fittings, and the applicability is wider.

A rotary mechanical shaft end fluid pressure adjusting device comprises a circular ring and axial flow guide grooves, the axial flow guide grooves are evenly distributed in the inner surface of the circular ring in the circumferential direction, the groove shapes are logarithmic spiral lines or parabolas or involutes, and the number of the axial flow guide grooves is 30-120. The circular ring is used for being fixed to the inner surface of the stator, and a radial gap is formed between the circular ring and the rotor. According to the invention, the pressure of the flowing fluid at the shaft end can be reduced or increased in the axial direction, the adjusted pressure can further meet the performance requirements of subsequent sealing or other parts, and the function completeness and stability of the whole machine are guaranteed.

The utility model relates to the technical field of railway bearing gland and torque detection, and discloses a railway bearing gland and torque detection device, which comprises a workbench, a placement plate is fixedly connected to the middle of the top end of the workbench, a plurality of cavities are formed in the placement plate, springs I are arranged in the cavities, and springs II are arranged in the cavities. A first limiting plate is slidably connected into the cavity, a rubber column is fixedly connected to the side, away from the first spring, of the first limiting plate, a controller is fixedly connected to the rear side of the top of the workbench, a supporting plate is slidably connected to the front end of the controller, and a detection head is fixedly connected to the bottom of the supporting plate. A protection assembly is arranged outside the detection head, and a clamping assembly is arranged on the inner wall of the bottom end of the workbench. According to the utility model, the positioning of the product is realized, the position consistency of the product during detection is ensured, the detection effect is ensured, the flexible clamping of the product is realized, and the device can adapt to products with different sizes.

The invention relates to a multifunctional test loading device for simulating bending shear torsion performance of a wind power tower, which comprises a counter-force column, a counter-force longitudinal beam, a counter-force cross beam and four actuators, and is characterized in that the counter-force cross beam is fixed at the top of the counter-force longitudinal beam through a bolt and is connected with a first actuator for axially applying pressure; the bottom of the tower drum is connected and fixed through a loading support with a kidney-shaped hole, and the end of the tower drum is connected with a loading beam through a conversion piece and abuts against a first actuator for axial pressure applying and loading. A fourth actuator on one side of the reaction wall is used for applying horizontal shearing force and torque; second and third actuators on the upper and lower sides of the counter-force longitudinal beam are used for applying bending moment; according to the device, loading of multiple load types can be achieved on the tower drum, the complex stress condition possibly borne by the tower drum in the actual use process can be simulated, and loading of any change of a single load of the tower drum can also be simulated; the device is suitable for loading and fixing tower barrels of different types and sizes; and the influence of torsional deformation and horizontal displacement on vertical load loading can be reduced through structural measures.

A combined three-dimensional force / torque sensor. A plurality of discrete one-dimensional force sensors (11, 12, 13, 14) are used to measure force components, and a conduction flange (2) is used to transmit an external force. The combined design effectively reduces inter-dimensional coupling and has a simple structure. The lateral torque and the axial pressure are monitored in a differential form and a summation form, thereby effectively improving the sensitivity and measurement accuracy of the sensor. Further disclosed is a miniature calibration system established by using the combined three-dimensional force / torque sensor. The calibration system has a small size and a simple structure, is easy to assemble and convenient to carry and transfer, and is capable of on-site calibration.