567 results about "Fatigue testing" patented technology

The invention discloses a fatigue test method for a cabin structural member of an offshore wind power generator. A test piece is subjected to surface treatment, a multi-sensor array is arranged, the test piece is placed in a combined system of a multi-axis dynamic loading unit and a collaborative environment simulation cabin, an intelligent control and analysis platform synchronously applies a multi-axis alternating load, salt spray corrosion and a circulating temperature and humidity environment, and real marine service conditions are simulated; the state of a test piece is evaluated in real time based on criteria such as a strain concentration coefficient and acoustic emission energy, a strengthening test is started for potential damage risks, a load strategy is adjusted to track crack propagation when microcracks are monitored, and after the test is ended, a fatigue life prediction model is established or calibrated by combining failure test piece analysis data. And outputting a life evaluation result and a structure improvement suggestion. Through the multi-factor collaborative simulation and self-adaptive control technology, the authenticity and efficiency of the test are improved, and technical support is provided for design optimization and reliability guarantee of offshore wind power cabin structural parts.

The invention provides a fretting fatigue testing device and method in an atmosphere environment, and relates to the technical field of material performance testing in a complex environment, and the device comprises an upper clamp, a lower clamp and a sealing cavity; the upper clamp and the lower clamp are respectively fixed in an upper chuck and a lower chuck of the first load loading mechanism; the sealing cavity is used for providing a sealed service atmosphere environment for a fatigue specimen and comprises two flange end covers and a tubular connecting piece, the two flange end covers are respectively connected with the upper clamp and the lower clamp in a sealing manner; the two ends of the tubular connecting piece are in sealing connection with the upper end cover and the lower end cover respectively, and sealing connection of at least one end is of a detachable structure. The device can realize accurate simulation and steady state maintenance of service gas, is suitable for multiple scenes such as dry / wet air, inertia, oxygen / hydrogen enrichment and corrosive gas, and overcomes the limitation that traditional atmospheric environment test data cannot be used for real life prediction.

The invention relates to a bending-torsion coupling transmission shaft fatigue test device and method, and relates to the technical field of test equipment. Comprising a test bench, a bending loading device arranged at one end of the test bench, a torque loading device arranged at the other end of the test bench, and a test piece bearing device arranged between the bending loading device and the torque loading device, the test piece bearing device comprises a guide rail which is arranged on the test bed and extends from the bending loading device to the torque loading device, a positioning seat which is in sliding connection with the guide rail, and a bearing plate which is arranged on the positioning seat and can be lifted, so that a simulation test of a coupling effect can be carried out on bending and torsion of a transmission shaft, and the test piece bearing device can also be used for bearing the transmission shaft. And the bending test can be carried out under the condition that the transmission shaft is supported at a specific position.

The automobile part torsional fatigue test bench comprises a bench body, a driving mechanism is arranged at one end of the top surface of the bench body, a workpiece carrying structure is arranged at the other end of the top surface of the bench body, a force application structure is arranged at the position, close to the driving mechanism, of the top surface of the bench body, and the driving mechanism comprises a driving bin. The end, away from the force application structure, of the driving bin is fixedly connected with a servo motor, and the two sides of the middle of the interior of the driving bin are fixedly provided with a cycloidal-pin wheel speed reduction assembly and a planetary speed reduction assembly correspondingly. The driving mechanism is driven by the servo motor, a huge oil supply hydraulic system does not need to be used, the occupied area is small, the output torsion load can be switched through the cycloidal-pin wheel speed reduction assembly or the planetary speed reduction assembly, the load output through the planetary speed reduction assembly is low, constant loads can be repeatedly applied to a workpiece for a long time, and the working efficiency is improved. The output load of the cycloidal-pin wheel speed reduction assembly is high, destructive testing of the maximum load can be carried out, and two detection modes can be considered.

The invention relates to a synchronous loading and self-adaptive compensation system for a fatigue test and a working method thereof.The synchronous loading and self-adaptive compensation system for the fatigue test is characterized in that the synchronous loading and self-adaptive compensation system comprises a T-shaped beam capable of being connected with a fatigue testing machine, the two lower side portions of the T-shaped beam are connected with pentagonal steel plates respectively, and the pentagonal steel plates are connected with the T-shaped beam. A plurality of groups of loading units are mounted between the two pentagonal steel plates, each loading unit comprises a hard shell and a rotating disc rotationally connected with the hard shell, a driving mechanism for driving the rotating disc to swing and rotate is arranged on the hard shell, a spherical hinge is fixedly mounted on the rotating disc, and the rotating disc is fixedly connected with the driving mechanism. The lower part of the spherical hinge is connected with an electric telescopic rod which can be electrically controlled to stretch out and draw back, and the lower end of the electric telescopic rod is provided with a loading block acting on the test piece; the problems of'void impact 'and'loading eccentricity' are fundamentally solved, and efficient, accurate and safe multi-test-piece synchronous fatigue test is realized.

The utility model discloses a transmission shaft torsional fatigue testing machine, which relates to the technical field of transmission shaft testing and comprises a workbench, a torsion component arranged on one side of the top surface of the workbench, a slide rail component arranged on the other side of the top surface of the workbench, and an angle adjusting mechanism arranged on the top surface of the slide rail component. A supporting component is arranged between the sliding rail assembly and the angle adjusting mechanism, the supporting component is arranged on the top face of the workbench, and a protection assembly is arranged above the workbench. In the using process of the device, the transmission shaft can be stably clamped, and accurate torsion testing can be achieved; the structure of the testing machine is optimized, and stability and reliability are improved; wear-resistant materials and structural reinforcement design are adopted, vulnerable parts are reduced, the service life is prolonged, a comprehensive and reliable basic database can be established through a fatigue life test, analysis design reliability is provided, development time is shortened, development cost is reduced, and the problems of product life reliability and bearing capacity are solved.

The invention belongs to the technical field of impact fatigue tests of metal materials, and relates to an impact fatigue test system for simulating a working condition environment of a gun firing pin, which can perform high-frequency cyclic loading of 200MPa-500MPa, microsecond (mu s) level impact pulse and more than kilohertz (kHz), and synchronously simulate the working condition environment. High-energy, high-frequency and short-pulse impact loading under the gun and gun firing pin working condition is carried out through the high-frequency impact generation subsystem, and the dynamic mechanical environment in actual service is effectively simulated; the environment simulation subsystem is used for accurately controlling the temperature, the concentration and the pH value of media such as salt mist and seawater, and is synchronously coupled with mechanical shock, so that mechanical-electrochemical synergistic damage conditions are truly represented; dynamic stress, strain, electrochemical parameters and surface topography in the impact process are synchronously monitored through a multi-parameter synchronous acquisition subsystem, and complete data support is provided for researching the damage evolution law of a material under a complex load; the repeatability and the safety of the test are ensured through the modularized sample clamp subsystem and the dynamic sealing design.

The invention discloses a multi-field coupling fatigue test device and method for a high-temperature superconducting tape, and belongs to the field of superconducting tape fatigue tests.The multi-field coupling fatigue test device for the high-temperature superconducting tape comprises a fatigue testing machine, and a test container used for providing a low-temperature field is arranged in a test area of the fatigue testing machine; a clamp assembly used for fixing a sample to be tested is arranged in the experiment container, the clamp assembly is connected with a current assembly used for providing an electric field, and a magnet assembly used for providing a magnetic field is arranged in the experiment container. According to the multi-field coupling fatigue test device and method for the high-temperature superconducting strip, the limitation of an existing test means is broken through, and a reliable experimental platform and application value are provided for mechanical property research and service life evaluation of superconducting materials and other low-temperature service materials.

The invention provides an improved Arcan disc complex stress metal fatigue test method. The method specifically comprises the following steps: (1) designing clamps for stretching, stretching-shearing and pure shearing fatigue tests; (2) designing a clamp for compression, compression-shear and pure shear fatigue tests; (3) designing a stretching-shearing or compression-shearing sample, and connecting the clamps designed in the step (1) and the step (2) to a clamping rod and a pin required by a fatigue testing machine; and (4) assembling the clamps designed in the step (1) and the step (2) and the sample designed in the step (3), and connecting to a fatigue testing machine by using a clamping rod and a pin. The metal fatigue performance test under different stress states such as stretching / compression, stretching-shearing / compression-shearing, pure shearing and the like can be realized, the fatigue test result difference caused by different stress states can be quantified, optical and high-resolution scanning electron microscope observation under in-situ conditions can be compatible, and the fatigue failure mechanism analysis is facilitated.

The invention provides a clamping device for a thin-wall whole pipe fatigue test and a test method, and belongs to the technical field of clamping devices. The device comprises clamping cushion blocks which are fixedly connected to two ends of a thin-wall whole tube sample main body and are used for transmitting test force; the high polymer material film adhesive tape is wound on a transition area of the clamping cushion block and the thin-wall whole pipe sample main body; the chock plugs are used for being plugged into the two ends of the thin-wall whole-tube sample main body, and packing paper is installed between the chock plugs and the inner wall of the thin-wall whole-tube sample main body and used for supporting the inner wall of the sample and evenly transmitting test force. The clamping cushion blocks are fixedly connected to the two ends of the sample and matched with the high polymer material film adhesive tape to reduce friction, the chock plugs are wound around the packing paper to support the inner wall, a stable clamping structure is formed, and it is ensured that fatigue fracture occurs in the working section. The problems of clamping stress concentration and fracture of a non-working section can be effectively avoided, the accuracy of a fatigue life evaluation result of the whole thin-wall pipe is improved, and the method can be widely applied to high-cycle and low-cycle fatigue performance tests under different conditions.

The invention discloses a spring fatigue test device, which belongs to the technical field of mechanical test equipment and comprises a rack, a data acquisition module, an environment simulation integrated cabin, a multi-axis loading module and a micro-motion simulation base. The rack provides a supporting and mounting space for the whole device. Through cooperative work of the main loading unit, the first auxiliary loading unit and the second auxiliary loading unit, axial loads, torsion loads and lateral loads can be applied to the spring at the same time or according to a preset phase relation in a test period, and the tension-compression-torsion-bending composite stress state of the spring under the actual working condition is accurately reproduced. Compared with a traditional uniaxial test, the result is closer to engineering practice, and the authenticity and the severity of the test are greatly improved.

The invention relates to the technical field of pavement material mechanical property testing, and discloses a pavement material deformation adaptability fatigue testing machine, which comprises a servo drive and control system, a mechanical transmission system and a structure support and reference system, the servo drive and control system comprises a servo motor, a PLC, a servo driver and an analog quantity output module, the PLC is electrically connected with the analog quantity output module, the analog quantity output module is electrically connected with the servo driver, and the servo driver is electrically connected with the servo motor. The load coverage range is wide, the test requirements of pavement material test pieces with different strengths are met, the requirements of various mechanical property tests on loads are met, the loading modes are flexible and diversified, single loading such as horizontal stretching, stretching containing vertical deformation and fatigue stretching circulation can be achieved, and the test efficiency is improved. The device can be combined with MMLS3 small acceleration loading equipment to realize composite loading of tire cyclic load and test piece deformation, and composite working conditions of the seamless expansion joint in actual service are accurately simulated.

The utility model provides a cold-drawing hot-pressing fatigue testing machine for a sealing material, which relates to the technical field of fatigue testing machines and comprises a test supporting seat, a pressure detection plate for pressure detection is fixedly mounted in the test supporting seat, and a negative pressure component for sucking the material is arranged in the middle of the test supporting seat. And a lifting support for lifting adjustment is fixedly mounted at the top end of the test supporting seat. The testing machine has the advantages that the rotatable test supporting seat is arranged in the testing machine to clamp and fix a tested material, the negative pressure assembly is arranged in the center of the test supporting seat to perform negative pressure adsorption on the tested material, and the test materials with various structures can be conveniently clamped and fixed by combining with the clamping of the test supporting seat; according to the material fixing device, material loosening caused by the limited clamping contact area is avoided, the stability of test material fixing can be effectively enhanced, the applicability of material fixing can be improved, and fixing tests can be conducted on unused materials easily.

The invention relates to the field of material detection, in particular to an in-situ monitoring method for fatigue damage of a cord thread / rubber composite material interface. The method comprises the following steps: carrying out ultrasonic swelling treatment on a cord thread coated with an RFL coating by using a carbon nanotube dispersion liquid, and then preparing an H extraction sample with rubber; and then connecting a circuit, fixing the obtained H extraction sample on an electronic fatigue testing machine, forming a closed loop circuit between the H extraction sample and the source meter, carrying out fatigue testing and measuring contact resistance, and carrying out resistance signal processing to obtain a resistance change rate deltaR / R0. The method provided by the invention is efficient and convenient, and the interface fatigue damage of the cord thread / rubber composite material can be visually and effectively monitored.

The invention discloses a friction, corrosion and alternating load coupled fatigue test tool which mainly comprises a corrosive liquid container, a moving module, a balancing module, a supporting module, a friction loading module and a fixing module, and the whole tool is mounted on a sample clamp of a fatigue testing machine. According to the test tool, a corrosion environment is provided by the corrosive liquid container, a friction load is provided by the friction loading module, an alternating tensile load is provided by the fatigue testing machine, and the coupling effect of friction, corrosion and alternating load on the annular tensile armor layer of the marine flexible riser in a real marine environment can be simulated; and tests under various different working conditions can be realized by changing the components of the corrosive liquid, changing the friction force, changing the material of the friction block and the like, and the damage process of the tensile armor layer in a real ocean service environment can be reproduced, so that the influence of a real friction, corrosion and alternating load coupling environment on the annular tensile armor layer of the ocean flexible riser can be researched.

The invention relates to the technical field of mechanical fatigue testing, in particular to rotary bending fatigue testing equipment for a rotor shaft, which comprises a base, a rotary driving module, a loading module, a dynamic balance module, a crack monitoring module and an adjusting module, and is characterized in that the rotary driving module drives the rotor shaft to rotate through a belt transmission assembly; the loading module adopts a lever type force reversing mechanism to realize accurate bending moment loading; the dynamic balance module automatically counteracts eccentric vibration through a free disc and a symmetrical bearing seat; the crack monitoring module captures vibration abnormity and internal crack initiation in real time; and the adjusting module is automatically adapted to different shaft lengths by driving a threaded screw rod through a motor. Anti-slip lines are arranged on the inner sides of the clamps at the two ends to ensure stable clamping; the levers are symmetrically arranged and matched with the locking nuts, so that switching of translation force or bending force applied by the levers is facilitated, the equipment realizes high-precision and full-period fatigue test, and the device is suitable for reliability evaluation of key rotor parts of aero-engines and steam turbines.

This invention discloses a rapid assessment method for hydrogen damage in ultra-long-life structures under alternating loads, relating to the field of materials performance evaluation. The method includes the following steps: S1: Analyzing the service conditions of typical ultra-long-life structures and key components to determine the service environment of key component materials; S2: Conducting ultra-high cycle fatigue tests under different stress ratios to obtain stress-life data for different lifespans; S3: Observing the fracture morphology of high-cycle fatigue and ultra-high cycle fatigue samples using scanning electron microscopy; S4: Performing hydrogen element detection to obtain the hydrogen content distribution around micro-defects; S5: Using the Basquin formula, piecewise linearly fitting the S-N data for the high-cycle fatigue and ultra-high cycle fatigue stages to obtain the slopes of two fitted lines; S6: Using the ratio of the slopes of the two fitted lines as the hydrogen damage factor. The method disclosed in this invention can achieve rapid assessment of hydrogen damage in long-life structures under alternating loads while ensuring the reliability of the assessment results.

The invention provides a parallel steel wire corrosion fatigue test device, and relates to the technical field of steel wire physical tests, the parallel steel wire corrosion fatigue test device comprises a closed cylinder, two ends of the closed cylinder are provided with openings for a test steel wire to penetrate, and the two ends of the test steel wire penetrate out of the closed cylinder and then are respectively clamped and fixed with an upper chuck and a lower chuck of a fatigue testing machine; the inner pipe is arranged in the closed cylinder, the test steel wire penetrates through the inner pipe in the axial direction, and the inner pipe is provided with a plurality of cracks with different sizes and / or different forms in the axial direction; the bag body is arranged on the inner wall of the inner pipe, the bag body has a first state and a second state which can be switched, and the aerial fog assembly communicates with the closed cylinder and is used for introducing corrosive aerial fog into the closed cylinder. And a corrosion medium and a fatigue load are synchronously applied to the local area to realize a real-time coupling effect of the corrosion medium and the fatigue load, so that corrosion fatigue test data with higher engineering authenticity and representativeness are obtained.

The invention relates to the technical field of online material performance test instruments, and discloses a sensor pulse pressure fatigue test closed-loop control system based on signal drift compensation, which comprises a load excitation execution module, a signal feedback acquisition module and a closed-loop control logic module, the closed-loop control logic module selects a phase-locked characteristic observation window by calculating a load first-order derivative, extracts a dynamic gain coefficient reflecting the response characteristic of a controlled test object in the observation window, and inputs the dynamic gain coefficient into a filter to generate a characteristic variable; the variable is compared with the standard response envelope line, the deviation is calculated, the compensation factor is calculated and superposed to the driving instruction, the real-time correction of the output gain is realized, and through the identification and active compensation of the signal drift, the sensing deviation caused by the structural degradation of the sensitive component is effectively eliminated, and the sensing consistency of the test process is maintained.

The invention discloses a circular air outlet fatigue testing method based on data analysis, and belongs to the technical field of automobile part testing. The method comprises the following steps: determining a fatigue detection process of a fatigue detection device on an air outlet workpiece, thereby selecting a range of fatigue detection key data, obtaining test results lower than a design fluctuation standard range in a fatigue test process, and constructing an unqualified test result set; according to the method, multi-dimensional data analysis is associated with an actual scene, so that the test result can accurately reflect the real fatigue state of the workpiece, and reliable support is provided for product quality control; and through an automatic process and a closed-loop improved mechanism, the detection efficiency is improved, the labor cost is reduced, the test system is continuously optimized, and finally a set of standardized fatigue test scheme considering both precision and efficiency is provided for the field of automobile part test. The method is of great significance in guaranteeing the durability of the round air outlet workpiece, reducing the after-sales maintenance cost and improving the user experience.

The utility model discloses an adjustable wheel radial fatigue testing machine, and relates to the field of wheel radial fatigue testing machines, the adjustable wheel radial fatigue testing machine comprises a base, the top of the base is fixedly provided with a support frame, the interior of the support frame is rotatably connected with a rotary drum through a bearing, the top of the base is slidably connected with a lifting box, and the interior of the lifting box is provided with a lifting assembly; by arranging the lifting assembly, the height of the test shaft can be rapidly adjusted, so that the installation process of a tire is faster and more convenient, a worker does not need to manually carry the tire to a higher position, physical output and carrying time are reduced, and the working efficiency is improved. Through the arrangement of the protection assembly, a fire source can be rapidly detected in the early stage of a fire caused by overheating of equipment due to long-time overload operation of the testing machine, and the fire is killed in the bud, so that the fire is prevented from further spreading.

The invention provides a multidirectional loading fatigue test device for an integral extrusion oil film damper. The multidirectional loading fatigue test device comprises a tested piece bearing shaft, a sealing shell and a tested piece, the tested piece comprises a handle part and an annular tested piece main body; the handle part is connected with the tested piece main body; an annular tested piece main body is sleeved on the tested piece bearing shaft, and the inner diameter of an inner ring of the tested piece main body is matched with the diameter of the tested piece bearing shaft; the sealing shell encapsulates the tested piece main body; an external force transmission structure is arranged on the handle part; a handle part traction rope fixing structure is arranged at the position, close to the external force transmission structure, of the handle part; a main body traction rope fixing structure is arranged on the tested piece main body; and a traction rope is arranged between the handle traction rope fixing structure and the main body traction rope fixing structure. The device can apply cyclic loads in the horizontal direction and the vertical direction to the test piece at the same time, and the effect that the cyclic loads act on the main body of the tested piece in multiple directions is achieved. The method is applied to the technical field of fatigue experiments.

This utility model relates to the technical field of torsional fatigue testing devices, specifically a shaft-type torsional fatigue testing device, including a first support and a second support. The first and second supports are rotatably connected to a first rotating shaft and a second rotating shaft arranged coaxially. A flange is fixedly connected to one end of the first and second rotating shafts that are close to each other. A rocker arm is fixedly connected to the first rotating shaft. The middle of a balance arm is fixedly connected to the second rotating shaft. Measuring arms are hinged to both ends of the balance arm, and a fixed seat is hinged to the end of the measuring arm away from the balance arm. A load sensor is fixedly connected to the middle of the measuring arm. This utility model uses a balance arm, a rocker arm, and a load sensor to measure torque instead of a torque sensor. When the torque is large, the length of the balance arm is increased to increase the length of the lever arm, reducing the force measured by the load sensor, so that the force value is within the range of the load sensor, thus completing the torsional test.

This invention discloses a planar spiral spring fatigue testing machine, comprising a base, a mounting seat fixedly mounted on the base, a reducer fixedly mounted on the mounting seat, a servo motor fixedly mounted at the rear of the reducer, and mounting brackets symmetrically mounted on the left and right sides of the mounting seat. Each mounting bracket is equipped with a rotatable rotating shaft. The output shafts at both ends of the reducer are nested and fixedly connected to the rotating shafts on the mounting brackets, and the rotating shafts on the mounting brackets are arranged symmetrically front to back. In this invention, the rotating shafts on the mounting brackets are arranged symmetrically front to back and have positioning grooves, so that the spiral springs to be tested are symmetrically installed. After one end is placed, the other end needs to be rotated 180 degrees counterclockwise. The servo motor drives the reducer to rotate, and the reducer and rotating shafts rotate together, causing the spiral springs to rotate. The spiral springs at both ends rotate in the same direction, and the forces on both sides cancel each other out. The torque of the servo motor can be smaller, making it more energy-efficient and effective.

The utility model relates to the technical field of photovoltaic equipment detection, and discloses a photovoltaic support fatigue resistance testing device which comprises a bottom frame, a motor is fixedly installed on the outer side of the bottom frame, a rotating rod is fixedly connected to an output shaft of the motor, a crank is fixedly connected to the end face of the rotating rod, a first sliding groove is formed in the side face, away from the rotating rod, of the crank, and a second sliding groove is formed in the side face of the crank. And an insertion hole is formed in the groove wall of the first sliding groove. According to the utility model, the button is pulled to separate the insertion rod from the insertion holes at different positions, and then the moving rod is pushed to slide in the first chute, so that the eccentric distance of the moving rod on the crank is adjusted, the moving distance of the impact block is changed, and the fatigue resistance test of photovoltaic supports with different lengths after being impacted can be met; the application range of the device is greatly expanded, it is avoided that different testing devices are independently designed for photovoltaic supports of different specifications, the testing cost is reduced, and the universality and practicability of the device are improved.

The invention discloses a tooth socket fatigue testing device, and relates to the technical field of tooth socket testing, the tooth socket fatigue testing device comprises a workbench, a transverse testing assembly and a longitudinal testing assembly, the workbench is vertically provided with a testing frame, the transverse testing assembly is arranged on the testing frame, and the longitudinal testing assembly is arranged on the testing frame. According to the device, the tooth socket is transversely bent in a reciprocating manner through the reciprocating transverse movement of the moving block of the transverse testing assembly, while the moving block does the transverse reciprocating movement, the pressing frame is driven to do the longitudinal reciprocating movement matched with the movement period of the moving block along the sliding rail, and the tooth socket is longitudinally bent in a reciprocating manner through the pressing frame; according to the device, transverse and longitudinal fatigue bending tests of the tooth socket can be synchronously realized, so that the tooth socket can bear a composite stress environment similar to that in actual use in an oral cavity in a test process, the problem that the traditional single-direction test is disjointed with an actual working condition is effectively solved, and the authenticity and reliability of a fatigue test result are greatly improved.

A spring fatigue testing mechanism comprises an equipment base, a lead screw, a lead screw disc, a pull rod, a pressing wheel, a cam and a cross beam, a testing table is arranged in the equipment base, the rear portion of the testing table is fixedly connected with a protection table, the interior of a protection beam is fixedly connected with a protection shell shaft rod, and the protection table is matched with the protection shell shaft rod and connected with the protection shell shaft rod. The upper portion of the protective beam is fixedly connected with the protective observation cover, the upper portion of the protective observation cover is provided with a handle, the side portion of the test board is fixedly connected with the supporting block, the front portion of the protective observation cover corresponds to the supporting block in position, the test board is matched with the test support, the test board is connected with the test support, and the test support slides in the test board. The interior of the test board is fixedly connected with the lead screw seat.

This disclosure relates to the field of fatigue testing, specifically to a bending fatigue testing apparatus and a bending fatigue testing system. The bending fatigue testing apparatus includes a test bench, a fixing fixture, and a loading fixture. The fixing fixture has two limiting ends spaced apart along a first direction, and the two limiting ends are connected to the test bench. The fixing fixture is movable relative to the test bench along a second direction to adjust the distance between the fixing fixture and the test bench. The test bench and the loading fixture are arranged sequentially along a third direction, and the loading fixture is movably arranged in the second direction, used to move the test piece along the second direction. The first direction is perpendicular to the second direction, and the third direction is perpendicular to both the first and second directions. By implementing the bending fatigue testing apparatus and system of the exemplary embodiments of this disclosure, cantilever bending fatigue tests can be performed on test pieces to test their bending fatigue performance.

The utility model relates to the technical field of automobile spring manufacturing, in particular to an automobile compression spring elasticity fatigue resistance testing device which comprises a working table, a supporting frame is fixedly installed on the surface of the upper end of the working table, and two sliding seats are installed in the middle of the supporting frame in a sliding mode. A height adjusting mechanism used for adjusting the height of the sliding base on the upper portion is installed on the supporting frame, a reciprocating motion mechanism is installed on the lower side of the sliding base on the lower portion, and locking mechanisms are arranged on the sides, close to each other, of the two sliding bases. The supporting diameter of the limiting block can be adjusted according to different springs, the different springs can be well fixed, and the problems that in the prior art, multiple springs cannot be well fixed, most springs are fixed through pressure of the upper portion and a simple supporting column, and the fixing effect is poor are solved. Therefore, the technical problem that the spring deviates and inclines during the fatigue test is solved.

The utility model discloses a fatigue testing device for turbine blades, which belongs to the related technical field of fatigue testing and comprises a support frame, a cover body arranged in the middle of the upper end of the support frame, a seat body arranged in the middle of the cover body, and a clamp arranged at the upper end of the seat body and used for positioning the turbine blades. An upper die is arranged at the upper end of the lower die in a lifting mode, and the protrusions and the limiting rings on the lower die and the upper die are matched with turbine blades in shape. And heating coils and cooling water pipes are arranged in the lower die and the upper die, and are communicated with the temperature display. According to the fatigue testing device for the turbine blade, a stable foundation and a protection environment are provided, and the turbine blade is allowed to be effectively fixed through the design of the clamp; the design of the heating coil and the cooling water pipe respectively ensures the temperature rise and cooling effect in the test process, ensures the accuracy of the test and the reliability of the equipment, and also considers the convenience of operation and the economical efficiency of maintenance at the same time.