Component fatigue test detection system

Abstract

The invention discloses a component fatigue test detection system, and relates to the technical field of fatigue test detection, a frame assembly comprises a loading cross beam, a stand column and a bearing base, and the loading cross beam is releasably connected with the stand column through a locking cylinder; the vertical loading device comprises a vertical loading actuator and is fixed on the loading cross beam, and a piston rod of the loading cross beam penetrates through the loading cross beam and is connected with the force sensor; the horizontal loading device is arranged on the bearing base and comprises a horizontal counter-force frame and a horizontal loading actuator, one end of the horizontal loading actuator is adjustably connected with the horizontal counter-force frame, and the other end of the horizontal loading actuator is used for being connected with a sample; the lateral force resisting device is connected between the loading cross beam and the vertical loading device and is used for transmitting the transverse acting force borne by the sample to the frame assembly; and the sample conveying device is arranged on the bearing base. According to the component fatigue test detection system, the technical problems that an existing fatigue test detection system is heavy in structure and large in occupied area, and a horizontal load interferes with a vertical loading system are solved.

Description

Technical Field

[0001] This invention relates to the field of fatigue testing technology for metal and composite material components, and particularly to a component fatigue testing system. Background Technology

[0002] Research on the mechanical service performance testing of metallic materials / components is a crucial support for ensuring the performance of key components in numerous fields such as aerospace, vehicles, and rail transportation. It is also a research area explicitly identified in the 14th Five-Year Plan for National Key Research and Development as addressing major national needs. This research primarily focuses on fatigue testing and static tension-compression-bending testing of metallic materials / components. Currently, the stress-fatigue mechanical performance testing of materials / components mainly employs a frame-configured hydraulic actuator. Traditional multi-axis composite loading utilizes front and rear ball joint connections in both vertical and horizontal directions, decoupling lateral forces through a two-force member structure to avoid the influence of lateral forces on the actuator.

[0003] However, existing technologies have a series of inherent problems: First, in order to withstand high loads, the frame is often made of integral welded frame, which results in bulky equipment structure, large footprint, and inconvenience in moving and installing; Second, traditional architecture lacks an effective transmission and isolation mechanism for lateral forces. In multi-axis loading, especially tension-torsion combined loading, the horizontal force may still interfere with the vertical loading system, affecting test safety and data reliability.

[0004] Therefore, how to provide a component fatigue testing system with a simplified structure and avoid interference from horizontal loads on the vertical loading system is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a component fatigue testing system that effectively solves the technical problems of existing fatigue testing systems, such as bulky structure, large footprint, and interference of horizontal loads on vertical loading systems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A component fatigue testing system, comprising:

[0008] The frame assembly includes a loading beam, a column, and a load-bearing base. The loading beam is releasably connected to the column via a locking cylinder and can move vertically along the column.

[0009] A vertical loading device includes a vertical loading actuator fixed to the loading beam, wherein the piston rod of the loading beam passes through the loading beam and is connected to a force sensor;

[0010] A horizontal loading device is provided on the bearing base and includes a horizontal reaction frame and a horizontal loading actuator. One end of the horizontal loading actuator is adjustablely connected to the horizontal reaction frame, and the other end is used to connect to the sample.

[0011] A lateral force resisting device is connected between the loading beam and the vertical loading device to transfer the lateral force on the specimen to the frame assembly.

[0012] A sample transport device, mounted on the support base, is used to drive a moving trolley carrying the sample into and out of the loading area of ​​the frame assembly.

[0013] Preferably, the frame assembly further includes a lifting cylinder, the cylinder body end of which is connected to the loading beam, and the piston rod end of which is connected to the bearing base, for driving the loading beam to move up and down along the column; the locking cylinder is logically linked to the lifting cylinder.

[0014] Preferably, there are four columns, and the columns are fixedly connected to the support base by locking nuts.

[0015] Preferably, the vertical loading device further includes a connecting rod and a locking pad; the piston rod of the vertical loading actuator is threadedly connected to the force sensor via the connecting rod.

[0016] Preferably, the locking pad has a wedge-shaped structure and is installed between the lower end face of the piston rod of the vertical loading actuator and the upper end face of the force sensor.

[0017] Preferably, the lateral force resisting device comprises:

[0018] Two locking guide seats are respectively fitted onto the two columns, and the upper end face of each locking guide seat is fixedly connected to the lower end face of the loading beam. Each locking guide seat has an installation groove at its center.

[0019] The guide rail slider is disposed in the mounting groove and extends vertically;

[0020] The adjusting bracket is slidably connected to the guide rail slider;

[0021] The loading plate is fixedly connected to the two adjustment brackets on both sides. The upper end of the loading plate is connected to the force sensor, and the lower end is used to connect to the sample.

[0022] Preferably, the horizontal loading device further includes a vertical adjustment component, and the horizontal loading actuator is mounted on the horizontal reaction frame through the vertical adjustment component to adjust the vertical height of the horizontal loading actuator; the horizontal reaction frame can be adjusted in position on the bearing base along the loading direction of the horizontal loading actuator, the rear end of the horizontal loading actuator is connected to the vertical adjustment component through a ball joint, and the front end is used to connect the sample.

[0023] Preferably, there are two horizontal loading actuators, which are symmetrically arranged with respect to the loading center plane of the vertical loading device, and the torsional loading of the specimen is achieved by applying an off-center load.

[0024] Preferably, the horizontal loading device further includes a horizontal actuator hoisting assembly for assisting in hoisting and supporting the horizontal loading actuator during the assembly and disassembly of the sample.

[0025] Preferably, the sample transport device includes a drive assembly, a support, a transmission assembly, and a mobile trolley; the drive assembly is fixed to the support base via the support; the transmission assembly converts the rotational motion of the drive assembly into linear motion to drive the mobile trolley to reciprocate along a linear track, and the height of the support surface of the mobile trolley is adjustable.

[0026] Compared with the above-mentioned background technology, the component fatigue testing system provided by the present invention has the following beneficial effects:

[0027] By using an independently designed anti-lateral force device, the lateral force on the sample is directly introduced into the frame assembly, isolating its influence on the vertical loading actuator, avoiding non-axial load interference, and significantly improving the accuracy of force measurement and system stability.

[0028] The split frame design with four columns and a liftable loading beam replaces the traditional integral welded heavy frame. While ensuring high load-bearing rigidity, it significantly reduces the weight of the equipment, making it easier to transport, install and adapt to the site. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the component fatigue testing system provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the frame component structure provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the vertical loading device structure provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the anti-lateral force device structure provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the horizontal loading device structure provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the sample transport device provided in an embodiment of the present invention.

[0036] in:

[0037] 1-Frame assembly, 2-Vertical loading device, 3-Side force resisting device, 4-Horizontal loading device, 5-Transportation device;

[0038] 101-Loading beam, 102-Column, 103-Locking cylinder, 104-Bearing base, 105-Lifting cylinder, 106-Locking nut;

[0039] 201-Vertical loading actuator, 202-Connecting rod, 203-Locking pad, 204-Force sensor;

[0040] 301-Loading plate, 302-Locking guide seat, 303-Guide rail slider, 304-Adjusting bracket;

[0041] 401-Horizontal reaction frame, 402-Vertical adjustment assembly, 403-Horizontal actuator hoisting assembly, 404-Horizontal loading actuator;

[0042] 501-Drive assembly, 502-Bracket, 503-Transmission assembly, 504-Mobile trolley, 505-Support base. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] See Figures 1-6The present invention provides a component fatigue testing system, comprising a frame assembly 1, which includes a loading beam 101, columns 102, and a bearing base 104. The loading beam 101 is releasably connected to the columns 102 via a locking cylinder 103 and can move vertically along the columns 102. There are four columns 102. The columns 102 and the bearing base 104 are fixedly connected by locking nuts 106. A vertical loading device 2 includes a vertical loading actuator 201, which is fixed to the loading beam 101. The piston rod of the loading beam 101 passes through the loading beam. 101 is connected to force sensor 204; horizontal loading device 4, located on bearing base 104, includes horizontal reaction frame 401 and horizontal loading actuator 404, one end of horizontal loading actuator 404 is adjustablely connected to horizontal reaction frame 401, and the other end is used to connect the sample; anti-lateral force device 3, connected between loading beam 101 and vertical loading device 2, is used to transfer the lateral force on the sample to frame assembly 1; sample transport device 5, located on bearing base 104, is used to drive the moving trolley 504 carrying the sample to enter and exit the loading area of ​​frame assembly 1.

[0046] Specifically, the frame component 1 includes a loading beam 101, four vertically arranged columns 102, and a support base 104. The four columns 102 are arranged in a rectangular array, with their lower ends rigidly fixed to the support base 104 by locking nuts 106, and their upper ends passing through the loading beam 101 and slidingly engaging with it. The loading beam 101 forms a releasable connection with the columns 102 through a locking cylinder 103. When the locking cylinder 103 is in the released state, the loading beam 101 can freely rise and fall vertically along the columns 102 under the action of external force. When the target height is reached, the locking cylinder 103 is activated to rigidly lock the loading beam 101 and the columns 102, ensuring the structural stability during the loading process.

[0047] The vertical loading device 2 is fixedly installed on the loading beam 101 and includes a vertical loading actuator 201, whose piston rod passes through the hollow hole of the loading beam 101 and is connected to the force sensor 204.

[0048] The horizontal loading device 4 is mounted on the support base 104 and includes a horizontal reaction frame 401 and a horizontal loading actuator 404. One end of the horizontal loading actuator 404 is adjustablely connected to the horizontal reaction frame 401, and the other end is connected to the sample.

[0049] The anti-lateral force device 3 is connected between the loading beam 101 and the vertical loading device 2. When the sample has a tendency to move laterally, it transmits the lateral force to the frame assembly, effectively preventing the vertical loading actuator 201 from bearing bending moment and ensuring loading accuracy and equipment life.

[0050] The sample transport device 5 is mounted on the support base 104 and is used to drive the moving trolley 504 carrying the sample into and out of the loading area of ​​the frame assembly 1.

[0051] Based on the above embodiments, see Figure 2 The frame assembly 1 also includes a lifting cylinder 105, the cylinder body end of which is connected to the loading beam 101 and the piston rod end is connected to the bearing base 104, for driving the loading beam 101 to rise and fall along the column 102; the locking cylinder 103 is logically linked with the lifting cylinder 105, the locking cylinder 103 is released when the lifting cylinder 105 is activated, and the locking cylinder 103 is locked after the lifting action is completed.

[0052] Specifically, the cylinder body of the lifting cylinder 105 is fixedly connected to the loading beam 101, while the piston rod is connected to the bearing base 104. When the lifting cylinder 105 extends or retracts, it can drive the loading beam 101 to rise and fall smoothly vertically along the four columns 102, thereby adapting to the installation requirements of samples at different heights.

[0053] A logical linkage control mechanism is provided between the locking cylinder 103 and the lifting cylinder 105. Before the lifting cylinder 105 performs the lifting action, the control system automatically puts the locking cylinder 103 into the release state, releasing the locking constraint between the loading beam 101 and the column 102, ensuring a smooth and interference-free lifting process. After the loading beam 101 reaches the target position, the lifting cylinder 105 stops moving, and the control system then triggers the locking cylinder 103 to extend, rigidly locking the loading beam 101 and the column 102 to ensure the high rigidity and stability of the structure during subsequent loading.

[0054] Furthermore, the control system adopts a programmable logic controller (PLC). The working principle of the locking cylinder 103 is as follows:

[0055] The locking cylinder 103 is a double-acting hydraulic actuator, and its piston rod end is integrated with a wedge-shaped locking block. Correspondingly, multiple locking grooves are provided on the outer side of the column 102 along the height direction, and a matching locking mating surface is provided on the inner side of the column through hole of the loading beam 101.

[0056] When the locking cylinder 103 is in the locking condition, its piston rod extends under hydraulic drive, pushing the locking block into the locking groove on the column 102, so that the loading beam 101 and the column 102 form a rigid connection in both the vertical and horizontal directions.

[0057] Specifically, the frame assembly 1 is equipped with fixed limit switches, which are respectively installed in the upper and lower limit areas of the column 102, for real-time monitoring of the vertical movement position of the loading beam 101. When the loading beam 101 reaches the preset upper / lower limit position during the lifting process, the limit switch sends a signal to the control system such as a PLC, automatically cutting off the drive command of the lifting cylinder 105 and forcibly stopping its action, thereby effectively preventing the loading beam 101 from mechanically colliding with the top structure or the support base 104.

[0058] Furthermore, the frame component 1 integrates a hydraulic control valve block, which is connected to the lifting cylinder 105 and the locking cylinder 103 via hydraulic lines and linked with the PLC control system to realize the sequential control and interlock protection of the "lifting-locking" action, ensuring the safety and reliability of the operation process.

[0059] Based on the above embodiments, see Figure 3 The vertical loading device 2 also includes a connecting rod 202 and a locking pad 203; the piston rod of the vertical loading actuator 201 is threadedly connected to the force sensor 204 through the connecting rod 202, and the locking pad 203 is a wedge-shaped structure, installed between the lower end face of the piston rod of the vertical loading actuator 201 and the upper end face of the force sensor 204.

[0060] Specifically, the lower end of the piston rod of the vertical loading actuator 201 is connected to the upper end of the connecting rod 202 by a thread, and the lower end of the connecting rod 202 is then connected to the upper end of the force sensor 204 by a reverse thread, forming a detachable axial force transmission chain.

[0061] The locking washer 203 is a segmented metal washer with a wedge-shaped surface, positioned in the axial gap between the lower end face of the piston rod of the vertical loading actuator 201 and the upper end face of the force sensor 204. During assembly, after the connecting rod 202 is tightened, the wedge-shaped surface of the locking washer 203 is struck, causing it to undergo a slight radial displacement, thereby creating an additional preload in the axial direction. This effectively eliminates microscopic gaps and loosening between the connection interfaces, preventing slight slippage or loosening under dynamic or alternating loads.

[0062] Based on the above embodiments, see Figure 4 The anti-lateral force device 3 includes two locking guide seats 302, which are respectively sleeved on the two columns 102, and the upper end face of each locking guide seat 302 is fixedly connected to the lower end face of the loading beam 101. Each locking guide seat 302 has a mounting groove at its center; a guide rail slider 303 is set in the mounting groove and extends vertically; an adjusting bracket 304 is slidably connected to the guide rail slider 303; and a loading plate 301, which is fixedly connected to the two adjusting brackets 304 on both sides. The upper end of the loading plate 301 is connected to the force sensor 204, and the lower end is used to connect the sample.

[0063] Specifically, two locking guide seats 302 are respectively fitted onto two columns 102, and their upper end faces are rigidly fixed to the lower end face of the loading beam 101 by bolts. They rise and fall and lock synchronously with the loading beam 101. Each locking guide seat 302 has an installation groove in its central area.

[0064] The guide rail slider 303 is installed in the mounting groove of each locking guide seat 302, extends vertically, and forms a vertical linear motion pair. The adjusting bracket 304 is fixedly connected to the corresponding guide rail slider 303 and can slide vertically with it.

[0065] The loading plate 301 is a high-strength metal plate. Its left and right sides are rigidly connected to two adjusting brackets 304 respectively. Its upper end is fixedly connected to the lower end of the force sensor 204 in the vertical loading device, and its lower end is used to connect to the upper end of the sample.

[0066] When the sample is subjected to lateral force or torque under the action of the horizontal loading device 4, the resulting lateral reaction force is efficiently transmitted to the entire frame assembly 1 through the path of loading plate 301-adjusting bracket 304-guide rail slider 303-locking guide seat 302-column 102-bearing base 104, thereby effectively isolating the influence of lateral load on vertical loading actuator 201.

[0067] Based on the above embodiments, see Figure 5 The horizontal loading device 4 also includes a vertical adjustment assembly 402. The horizontal loading actuator 404 is mounted on the horizontal reaction frame 401 via the vertical adjustment assembly 402 to adjust the vertical height of the horizontal loading actuator 404. The horizontal reaction frame 401 can be adjusted in position on the bearing base 104 along the loading direction of the horizontal loading actuator 404. The rear end of the horizontal loading actuator 404, facing the horizontal reaction frame 401, is connected to the vertical adjustment assembly 402 via a ball joint. The front end, away from the horizontal reaction frame 401, is used to connect the specimen. There are two horizontal loading actuators 404, which are symmetrically arranged relative to the loading center plane of the vertical loading device 2. The torsional loading of the specimen is achieved by applying an off-center load. The horizontal loading device 4 also includes a horizontal actuator hoisting assembly 403, which is used to assist in hoisting and supporting the horizontal loading actuator 404 when assembling and disassembling the specimen.

[0068] Specifically, the horizontal loading actuator 404 is mounted on the horizontal reaction frame 401 via the vertical adjustment component 402. The vertical adjustment component 402 can adjust the installation height of the horizontal loading actuator 404 to adapt to the loading point height of samples of different sizes.

[0069] The horizontal reaction frame 401 is supported on the bearing base 104 and its position can be adjusted along the horizontal loading direction, i.e., the axial direction of the horizontal loading actuator 404, by the sliding guide rail set at the bottom, so as to meet the installation requirements of samples of different lengths.

[0070] The rear end of the horizontal loading actuator 404 is connected to the vertical adjustment assembly 402 via a ball joint. The ball joint structure allows the horizontal loading actuator 404 to deflect freely within a certain angle range, effectively compensating for displacement deviations caused by specimen deformation, installation errors, or thermal expansion, avoiding the generation of additional bending moments, and ensuring load purity.

[0071] Preferably, two horizontal loading actuators 404 are provided and arranged in a mirror-symmetrical manner with respect to the loading center plane of the vertical loading device 2. During the torsional loading test, the control system can apply equal and opposite horizontal forces to the two actuators to form a couple, thereby generating a controllable torque on the specimen.

[0072] The horizontal actuator lifting assembly 403 includes a cantilever bracket, a manual or electric hoist, a support bracket, and a quick-connect interface. During sample installation or replacement, the horizontal actuator lifting assembly 403 can temporarily support the weight of the horizontal loading actuator 404, relieve its constraint on the sample, and assist in its quick disassembly or repositioning, significantly improving operational safety and testing efficiency.

[0073] Specifically, the vertical adjustment assembly 402 is used to adjust the position of the horizontal loading actuator 404 in the Z-direction, i.e., the vertical direction. The Z-direction adjustment mechanism is a screw and nut pair. The screw is vertically mounted on the horizontal reaction frame 401, and the nut seat is fixedly connected to the mounting base of the horizontal loading actuator 404. The screw is driven to rotate by operating a manual rocker wheel, which in turn drives the nut seat and the connected horizontal loading actuator 404 to rise and fall smoothly in the vertical direction.

[0074] Furthermore, to enhance the system's adaptability to sample assembly errors or deformation responses, a Y-shaped guide groove extending along the Y direction is provided on the nut seat; correspondingly, a guide boss that slides in conjunction with the guide groove is integrated on the ball joint structure base connecting to the rear end of the horizontal loading actuator 404. The guide boss can slide freely within the Y-shaped guide groove, allowing the horizontal loading actuator 404 to make slight translational adjustments in the Y direction.

[0075] Based on the above embodiments, see Figure 6 The sampling device 5 includes a drive assembly 501, a bracket 502, a transmission assembly 503, a moving trolley 504, and a support base 505. The drive assembly 501 is fixed to the support base 104 via the bracket 502. The transmission assembly 503 converts the rotational motion of the drive assembly 501 into linear motion to drive the moving trolley 504 to move back and forth along a linear track. The height of the bearing surface of the moving trolley 504 is adjustable.

[0076] The transmission component 503 is used to efficiently convert the rotational motion output by the drive component 501 into linear motion, thereby driving the moving trolley 504 to move back and forth along the linear track laid on the support base 104 in the X direction, i.e. the sample entry and exit direction, so as to realize the automatic feeding of the sample into the loading area or the removal of the sample to the loading and unloading station.

[0077] Specifically, bracket 502 and support base 505 are fixedly installed at both ends of the bearing base 104 along the X direction, forming a span-type double-end support structure for the transmission assembly 503. The transmission assembly 503 includes a ball screw and a nut seat that mates with it. The ball screw is arranged horizontally along the X direction, and its two ends are rotatably installed in bracket 502 and support base 505 through slewing bearings such as angular contact ball bearing assemblies.

[0078] The drive assembly 501 adopts a dual-mode drive design: a motor drive mode, in which the motor is directly connected to one end of the ball screw via a coupling; and a manual crank mechanism, which allows for sample movement without power by inserting the manual crank to drive the same input shaft during power outages, debugging, or maintenance. Both drive methods share a transmission interface and are prevented from operating simultaneously via a mechanical clutch or interlocking structure, ensuring safety and reliability.

[0079] The moving carriage 504 is fixedly connected to the nut seat and moves in the X direction along a linear track as the ball screw rotates. The moving carriage 504 is detachably connected to the sample, such as by a quick-change clamp or bolts, which facilitates quick replacement of different types of samples.

[0080] Furthermore, the bearing surface of the mobile trolley 504 is integrated with a height adjustment mechanism, such as a spiral lifting platform, which can be adjusted according to the total height of the sample body and its upper and lower clamps, so that the upper end of the sample is precisely aligned with the lower end interface of the force sensor 204 in the vertical loading device 2, ensuring that the loading axis coincides and avoiding additional bending moment caused by eccentric loading.

[0081] Furthermore, the locking cylinder 103, lifting cylinder 105, vertical loading actuator 201, force sensor 204, guide rail slider 303, horizontal loading actuator 404, and drive assembly 501 involved in this application are all well-known mature products or conventional technologies in the art. For example, the locking cylinder 103 and lifting cylinder 105 can be standard hydraulic cylinders; the vertical and horizontal loading actuators can be electro-hydraulic servo actuators; the force sensor 204 is a commercially available S-type force sensor; and the guide rail slider 303 can be a linear rolling guide pair or a sliding guide assembly.

[0082] The specific structure, internal configuration, driving method, and detailed working principle of the aforementioned components are fully disclosed in the prior art, and their selection and integration fall within the scope of conventional design capabilities for those skilled in the art. Therefore, the internal structure and basic working principle of each component will not be elaborated upon.

[0083] The workflow of the component fatigue testing system of this invention is as follows:

[0084] When the sample transport device 5 is started, the moving trolley 504 carries the sample with the lower clamp installed and moves it from outside the frame along the track into the center of the loading area, so that the upper end of the sample is close to the force sensor 204 of the vertical loading device 2, and the upper end of the sample is manually connected to the lower end of the force sensor 204.

[0085] The Z-axis height of the horizontal loading actuator 404 is adjusted by the manual crank of the vertical adjustment component 402, and its lateral position is finely adjusted by the Y-guide groove so that the front end of the actuator aligns with the horizontal loading point of the sample.

[0086] The lifting cylinder 105 finely adjusts the loading beam 101 to the preset working height; after the limit switch confirms that the position is correct, the PLC controls the locking cylinder 103 to extend and rigidly lock the loading beam 101 to the column 102.

[0087] The vertical loading actuator 201 applies tensile or compressive loads according to a preset program, and the force sensor 204 provides real-time feedback of axial force.

[0088] The anti-lateral force device 3 efficiently transmits the lateral force on the sample to the frame assembly 1 via the loading plate 301-adjusting bracket 304-guide rail slider 303-locking guide seat 302, thus preventing the vertical loading actuator 201 from bearing bending moment.

[0089] The system can perform static, quasi-static, low-cycle fatigue, or multi-axis coupled loading spectra, and the data is acquired and stored in real time by the control system.

[0090] Compared with the prior art, the present invention has the following significant advantages and beneficial effects:

[0091] By using the independently designed anti-lateral force device 3, the lateral force on the sample is directly introduced into the frame assembly 1, completely isolating its influence on the vertical loading actuator 201, avoiding non-axial load interference, and significantly improving the force measurement accuracy and system stability.

[0092] The split frame design with four columns and a liftable loading beam replaces the traditional integral welded heavy frame. While ensuring high load-bearing rigidity, it significantly reduces the weight of the equipment, making it easier to transport, install and adapt to the site.

[0093] The vertical loading beam 101 can be adjusted in height over a wide range by the lifting cylinder 105; the horizontal loading actuator 404 can achieve Z-axis lifting and Y-axis fine adjustment through the vertical adjustment component 402, and with the ball joint adaptive angle, it can accurately match the loading interface of various sizes and shapes of samples, with excellent versatility.

[0094] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0095] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A component fatigue testing system, characterized in that, include: The frame assembly (1) includes a loading beam (101), a column (102) and a support base (104). The loading beam (101) is releasably connected to the column (102) via a locking cylinder (103) and can move vertically along the column (102). The vertical loading device (2) includes a vertical loading actuator (201) fixed on the loading beam (101), and the piston rod of the loading beam (101) passes through the loading beam (101) and is connected to the force sensor (204). A horizontal loading device (4) is provided on the bearing base (104), including a horizontal reaction frame (401) and a horizontal loading actuator (404). One end of the horizontal loading actuator (404) is adjustablely connected to the horizontal reaction frame (401), and the other end is used to connect the sample. Lateral force resisting device (3), connected between the loading beam (101) and the vertical loading device (2), is used to transfer the lateral force on the specimen to the frame assembly (1). The sample transport device (5) is located on the support base (104) and is used to drive the moving trolley (504) carrying the sample to enter and exit the loading area of ​​the frame assembly (1).

2. The component fatigue testing system according to claim 1, characterized in that, The frame assembly (1) also includes a lifting cylinder (105), the cylinder body end of the lifting cylinder (105) is connected to the loading beam (101), and the piston rod end is connected to the bearing base (104), for driving the loading beam (101) to rise and fall along the column (102); the locking cylinder (103) is logically linked with the lifting cylinder (105).

3. The component fatigue testing system according to claim 2, characterized in that, The number of columns (102) is four, and the columns (102) are fixedly connected to the bearing base (104) by locking nuts (106).

4. The component fatigue testing system according to claim 2, characterized in that, The vertical loading device (2) further includes a connecting rod (202) and a locking pad (203); the piston rod of the vertical loading actuator (201) is threadedly connected to the force sensor (204) through the connecting rod (202).

5. The component fatigue testing system according to claim 4, characterized in that, The locking pad (203) has a wedge-shaped structure and is installed between the lower end face of the piston rod of the vertical loading actuator (201) and the upper end face of the force sensor (204).

6. The component fatigue testing system according to claim 4, characterized in that, The anti-lateral force device (3) includes: Two locking guide seats (302) are respectively fitted onto the two columns (102), and the upper end face of each locking guide seat (302) is fixedly connected to the lower end face of the loading beam (101). Each locking guide seat (302) has an installation groove at its center. The guide rail slider (303) is disposed in the mounting groove and extends vertically; The adjusting bracket (304) is slidably connected to the guide rail slider (303); The loading plate (301) is fixedly connected to the two adjustment brackets (304) on both sides. The upper end of the loading plate (301) is connected to the force sensor (204), and the lower end is used to connect the sample.

7. The component fatigue testing system according to claim 6, characterized in that, The horizontal loading device (4) further includes a vertical adjustment component (402). The horizontal loading actuator (404) is mounted on the horizontal reaction frame (401) through the vertical adjustment component (402) to adjust the vertical height of the horizontal loading actuator (404). The horizontal reaction frame (401) can be adjusted in position on the bearing base (104) along the loading direction of the horizontal loading actuator (404). The rear end of the horizontal loading actuator (404) is connected to the vertical adjustment component (402) through a ball joint, and the front end is used to connect the sample.

8. The component fatigue testing system according to claim 7, characterized in that, There are two horizontal loading actuators (404), which are arranged symmetrically with respect to the loading center plane of the vertical loading device (2) to achieve torsional loading of the specimen by applying an off-center load.

9. The component fatigue testing system according to claim 7, characterized in that, The horizontal loading device (4) further includes a horizontal actuator hoisting assembly (403) for assisting in hoisting and supporting the horizontal loading actuator (404) during the assembly and disassembly of the sample.

10. The component fatigue testing system according to claim 7, characterized in that, The sample transport device (5) includes a drive assembly (501), a bracket (502), a transmission assembly (503), and a moving trolley (504); the drive assembly (501) is fixed to the support base (104) via the bracket (502); the transmission assembly (503) converts the rotational motion of the drive assembly (501) into linear motion to drive the moving trolley (504) to move back and forth along a linear track, and the height of the bearing surface of the moving trolley (504) is adjustable.

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