A new type of paired eccentric blade root five-channel bidirectional composite loading device

Abstract

The application relates to the technical field of wind power detection, and discloses a novel paired eccentric blade root five-channel bidirectional composite loading device which comprises a workbench, a multi-channel detection assembly, an auxiliary shielding assembly, a quick connecting assembly and a support frame. The multi-channel detection assembly adjusts the inclination angle of an extrusion plate through differential displacement of two groups of electric push rods at the bottom layer, so that the extrusion plate is completely attached to the surface of the blade root, then the electric push rods are synchronously extended to apply a horizontal thrust, and a top push rod is used to apply a vertical load, so that multi-dimensional composite stress testing is realized. The auxiliary shielding assembly stretches and unfolds an air bag upwards to form a physical protection barrier, and uses the negative pressure generated by the internal volume change to suck the debris on the workbench to a guide groove. The quick connecting assembly uses an inclined surface to extrude a wedge block to release the locking, so that the blade root is quickly and self-locked clamped. The application eliminates the eccentric load error caused by rigid contact, and greatly improves the stress collection accuracy and the safety of the high-pressure test process.

Description

Technical Field

[0001] This invention relates to the field of wind power testing technology, specifically a novel paired eccentric blade root five-channel bidirectional composite loading device. Background Technology

[0002] The composite loading device for wind turbine blade roots belongs to the field of wind power component testing technology. This device is mainly used to simulate the complex spatial loads borne by the root of wind turbine blades during actual operation in a laboratory environment. By applying thrust and pressure in different directions to the blade root specimen, stress and deformation data under multiaxial composite stress conditions are obtained, thereby verifying the fatigue life and ultimate bearing capacity of the blade root structure.

[0003] In existing wind turbine blade root loading tests, the blade root specimen is typically fixed to a test pedestal using clamps, and multiple independent actuators are arranged in the surrounding space of the specimen. These actuators extend along a preset axial path and directly contact the surface of the blade root specimen through rigid pressure blocks or compression plates fixed at their ends. After the test procedure is initiated, each set of actuators performs linear motion along the horizontal and vertical directions according to the control program, transferring thrust to the surface of the blade root specimen, thereby completing the application of the spatial load.

[0004] However, existing loading devices typically employ a fixed rigid connection or a single-angle contact method between the extrusion component and the blade root specimen surface when performing multi-axis composite loading. Due to geometric manufacturing errors in the outer contour of the blade root specimen or slight deformation during compression, this fixed contact method prevents the extrusion surface from dynamically adhering to the blade root surface. This results in local gaps and rigid off-center loading errors at the contact interface, causing the applied load direction to deviate from the theoretical normal direction. This unstable normal force condition directly interferes with the data acquisition accuracy of the pressure sensor, thereby reducing the reliability of the detection results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a novel paired eccentric leaf root five-channel bidirectional composite loading device, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a novel paired eccentric leaf root five-channel bidirectional composite loading device, comprising a worktable, a support frame fixedly connected to the upper surface of the worktable, a top plate fixedly connected to the upper end of the support frame, a reinforcing rib fixedly connected to the outer side of the support frame, an auxiliary shielding component provided on the upper surface of the worktable, a multi-channel detection component provided on the upper surface of the worktable, an electric guide rail provided on the inner side of the support frame, and a quick connection component provided on the outer side of the electric guide rail; The multi-channel detection assembly includes a pressing plate, a pressure sensor fixedly connected to the outer side of the pressing plate, an electric push rod one hinged to the side of the pressing plate away from the pressure sensor, a rotating block rotatably connected to the lower end of the pressing plate, an electric push rod two hinged to the lower end of the rotating block, a slider rotatably connected to the lower surface of the rotating block, and an electric push rod three fixedly connected to the upper part of the support frame.

[0007] Preferably, the auxiliary shielding component includes a sliding frame, a connecting block slidably connected to the rear end of the sliding frame, a connecting block slidably connected to a support frame at the end away from the sliding frame, an airbag fixedly connected to the lower end of the sliding frame, a connecting pipe fixedly connected to the lower end of the airbag, a transmission pipe connected to the end of the connecting pipe away from the airbag, two sets of one-way valves fixedly connected to the inner surface of the transmission pipe, and a branch of the transmission pipe connected to a guide groove.

[0008] Preferably, the quick-connect assembly includes a disassembly block, an arc-shaped block is fixedly connected to the front surface of the disassembly block, wedges are slidably connected to both ends of the inner surface of the disassembly block, a button is slidably connected to the front surface of the disassembly block, and a leaf root is detachably connected to the arc surface of the arc-shaped block.

[0009] Preferably, the upper surface of the worktable is provided with a slide groove for sliding the slider, the front surface of the support frame is provided with a slide groove for sliding the connecting block, and multiple sets of multi-channel detection components are provided, and the multiple sets of multi-channel detection components are symmetrically distributed about the center line of the worktable.

[0010] Preferably, the inner surface of the extrusion plate has multiple sets of pressure sensor mounting grooves, and two sets of electric push rods are provided, with the two sets of electric push rods located at the front and rear of the extrusion plate, respectively.

[0011] Preferably, the lower surface of the rotating block is provided with a hinge block for connecting with the electric push rod two and rotating with the slider, the outer surface of the slider is slidably connected with the worktable, and the lower surface of the electric push rod three is provided with a rectangular pressure plate.

[0012] Preferably, the auxiliary shielding components are provided in two sets, and the two sets of auxiliary shielding components are located at the front and rear ends of the worktable respectively. A magnetic block is fixedly connected to the upper surface of the sliding frame, a handle is fixedly connected to the front surface of the sliding frame, and a rectangular sliding groove is provided at the end of the sliding frame away from the handle.

[0013] Preferably, the lower end of the airbag is fixedly connected to the workbench, the outer surface of the connecting pipe is fixedly connected to the workbench, the two sets of one-way valves are symmetrically distributed with the center line of the transmission pipe as the axis of symmetry, the conduction direction of the two sets of one-way valves is away from the workbench, and the guide groove is set at the four corners of the upper surface of the workbench.

[0014] Preferably, the electric guide rail inside the support frame has a slot, the left and right sides of the disassembly block have grooves to accommodate the sliding of the wedge block, the upper surface of the disassembly block has a groove to accommodate the sliding of the button, and the lower surface of the button is formed as an inclined surface.

[0015] Preferably, the upper surface of the wedge is provided with an inclined groove, the tail of the wedge is elastically connected to the disassembly block by a spring, and the arc apex of the arc block is provided with a threaded groove.

[0016] This invention provides a novel paired eccentric leaf root five-channel bidirectional composite loading device. It possesses the following beneficial effects: 1. This invention achieves multi-dimensional composite loading at the blade root through the coordinated action of multiple sets of push rods. Two horizontally arranged sets of push rods first generate differential displacement, adaptively adjusting the tilt angle of the extrusion plate to perfectly conform to the blade root profile. After locking in place, the two sets of push rods extend synchronously to apply horizontal thrust. Combined with the vertical load independently applied by the top push rod, a composite stress testing environment is constructed. This transmission design eliminates the gaps and off-center loading errors caused by rigid contact, ensuring absolute stability of the normal force, thereby significantly improving the accuracy of stress data acquisition by the pressure sensor and the reliability of the detection results.

[0017] 2. This invention achieves both safety protection and pneumatic dust removal simultaneously through the deformation and deployment of an airbag mechanism. Pulling upwards deploys the airbag and magnetically fixes it to the lower surface of the top plate, creating a physical barrier around the test area and effectively blocking debris from flying particles when the sample breaks under pressure. Simultaneously, the airbag's stretching process causes a sudden increase in internal volume, generating negative pressure suction that, guided by a one-way valve, draws residual dust and impurities from the test platform into the bottom guide groove. This linked structure utilizes a single action to simultaneously trigger physical shielding and negative pressure dust removal, fully ensuring the safety of the high-pressure testing environment and preventing debris accumulation on the workbench from obstructing mechanical components.

[0018] 3. This invention achieves efficient clamping and positioning of test specimens through a press-type quick-connect mechanism. The mechanism utilizes the inclined groove of the wedge block pressed by the beveled surface at the bottom of the button, converting the vertical pressing force into a horizontal inward displacement of the wedge block against the spring force, thus releasing its mechanical lock to the guide rail slot. After release, the wedge block automatically pops out and locks itself back in place by the spring, completing the rapid fixation of the clamping base. This beveled reversing unlocking design allows operators to perform sliding adjustments and precise self-locking with one hand, simplifying the cumbersome tightening process, significantly shortening the preparation time before loading tests, and improving overall operational convenience. Attached Figure Description

[0019] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3This is a three-dimensional structural diagram of the multi-channel detection component of the present invention; Figure 4 This is a partial structural schematic diagram of the auxiliary shielding component of the present invention; Figure 5 This is an internal cross-sectional view of the transmission pipe and one-way valve of the present invention; Figure 6 This is a three-dimensional structural diagram of the quick-connect component of the present invention; Figure 7 This is an internal cross-sectional view of the quick-connect component of the present invention.

[0020] The components include: 1. Workbench; 2. Multi-channel detection assembly; 3. Auxiliary shielding assembly; 4. Quick connection assembly; 5. Support frame; 6. Top plate; 7. Leaf root; 8. Reinforcing rib; 201. Electric push rod three; 202. Extrusion plate; 203. Electric push rod one; 204. Electric push rod two; 205. Slider; 206. Rotating block; 207. Pressure sensor; 301. Transmission pipe; 302. One-way valve; 303. Guide groove; 304. Connecting block; 305. Airbag; 306. Handle; 307. Connecting pipe; 308. Sliding frame; 401. Arc block; 402. Button; 403. Wedge block; 404. Disassembly block. Detailed Implementation

[0021] The technical solutions in 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.

[0022] Example: Please see the appendix Figure 1 - Appendix Figure 3This invention provides a novel paired eccentric leaf root five-channel bidirectional composite loading device, including a workbench 1. The workbench 1 serves as the heavy-duty foundation base of the entire loading device, and is integrally cast from high-rigidity cast iron to bear and absorb the mechanical vibration and reactive forces generated during multi-axis composite loading. A support frame 5 is fixedly connected to the upper surface of the workbench 1. The support frame 5 adopts a portal double-column structure to construct a gantry support system perpendicular to the workbench 1 in space. A top plate 6 is fixedly connected to the upper end of the support frame 5. The top plate 6, the support frame 5, and the workbench 1 together form a closed rigid load-bearing frame, effectively preventing the load direction from deviating due to elastic deformation of the frame during high-pressure loading. Reinforcing ribs 8 are fixedly connected to the outer side of the support frame 5. The reinforcing ribs 8 adopt a triangular plate structure and are symmetrical. Distributed on the outer side of the connection angle between the support frame 5 and the workbench 1, it is used to strengthen the lateral bending stiffness of the support frame 5 and disperse the shear stress caused by the horizontal lateral thrust on the root of the support frame 5. An auxiliary shielding component 3 is provided on the upper surface of the workbench 1. The auxiliary shielding component 3 is used to block the specimen fracture splash during the loading test and also has the function of negative pressure dust removal on the table surface. A multi-channel detection component 2 is provided on the upper surface of the workbench 1. The multi-channel detection component 2 is the main mechanical force application mechanism and is responsible for performing multi-degree-of-freedom coordinated power output. An electric guide rail is provided on the inner side of the support frame 5. The electric guide rail is the linear movement control end for position adjustment. A disassembly block 404 in the quick connection component 4 is inserted into the outer side of the electric guide rail. The quick connection component 4 is used to rigidly associate the test piece with the moving pair and realize quick self-locking clamping. The multi-channel detection component 2 includes a pressing plate 202, which is made of hardened alloy steel and has high surface hardness and compressive strength. It is used to directly contact and transmit lateral loads. Pressure sensors 207 are fixedly connected to the outer side of the pressing plate 202. The pressure sensors 207 are distributed in a matrix along the pressure-bearing surface of the pressing plate 202 to capture normal stress feedback data at each stress point in real time. An electric push rod 203 is hinged to the side of the pressing plate 202 away from the pressure sensors 207. The hinge design converts the linear motion of the electric push rod 203 into angular displacement or translational force of the pressing plate 202. The lower end of the pressing plate 202 is rotatably connected to... There is a rotating block 206, which serves as a connecting medium for multiple rotating pairs. The lower end of the rotating block 206 is hinged to an electric push rod 204, and a slider 205 is rotatably connected to the lower surface of the rotating block 206. Through the differential displacement output of the electric push rod 1 203 and the electric push rod 204, the rotating block 206 can be driven to swing relative to the slider 205, thereby dynamically adjusting the contact plane angle of the extrusion plate 202 and achieving full contact and non-eccentric load contact with the irregular surfaces of the paired eccentric blade roots. The upper part of the support frame 5 is fixedly connected to an electric push rod 3 201, which is erected in the vertical direction and is used to independently execute the downward vertical extrusion load input.

[0023] The upper surface of the workbench 1 has a groove for sliding the slider 205. The groove adopts a dovetail groove or T-groove structure, which constrains the vertical jump of the slider 205 while allowing the slider 205 to slide smoothly along the horizontal axis. The front surface of the support frame 5 has a groove for sliding the connecting block 304. Multiple sets of multi-channel detection components 2 are provided, and the multiple sets of multi-channel detection components 2 are symmetrically distributed about the center line of the workbench 1. This symmetrical layout can synchronously reverse or unidirectionally counteract the load on paired eccentric blade roots to simulate the real blade operating conditions, and can cancel out the resultant force in the horizontal direction, optimizing the stress state of the overall frame. The inner surface of the extrusion plate 202 has multiple sets of pressure sensor mounting grooves. The mounting grooves are used to accommodate the pressure sensor 207 in a countersunk manner, avoiding the pressure sensor 207 from being exposed and damaged by shear force. Two sets of electric push rods 203 are provided, and the two sets of electric push rods 203 are located at the front and rear of the extrusion plate 202, respectively. With the dual push rod configuration at the front and rear, the differential extension and retraction of the two sets of electric push rods 203 can introduce a composite bending moment in the horizontal plane in the yaw or torsional direction. The lower surface of the rotating block 206 is provided with a hinge block for connecting with the electric push rod 204 and rotating with the slider 205. The outer surface of the slider 205 is slidably connected to the worktable 1. The lower surface of the electric push rod 201 is provided with a rectangular pressure plate. The rectangular pressure plate has a large pressure area to convert the concentrated point load of the electric push rod 201 into a uniformly distributed vertical compressive stress, which acts on the top of the blade root 7. In addition, the lower surface of the pressure plate is also provided with a pressure sensor 207 for transmitting pressure data at the blade root during the extrusion process.

[0024] Please see the appendix Figure 4 - Appendix Figure 5 The auxiliary shielding component 3 includes a sliding frame 308. A connecting block 304 is slidably connected to the rear end of the sliding frame 308. The end of the connecting block 304 away from the sliding frame 308 is slidably connected to the support frame 5. An airbag 305 is fixedly connected to the lower end of the sliding frame 308. The airbag 305 is made of multi-layer composite high-elasticity wear-resistant rubber or polyurethane fabric, which has good extensibility, airtightness and impact resistance. A connecting pipe 307 is fixedly connected to the lower end of the airbag 305. A transmission pipe 301 is connected to the end of the connecting pipe 307 away from the airbag 305. Two sets of one-way valves 302 are fixedly connected to the inner surface of the transmission pipe 301. A branch of the transmission pipe 301 is connected to a guide groove 303.

[0025] Two sets of auxiliary shielding components 3 are provided, and the two sets of auxiliary shielding components 3 are located at the front and rear ends of the workbench 1 respectively. A magnetic block is fixedly connected to the upper surface of the sliding frame 308. The magnetic block is a high-strength neodymium iron boron permanent magnet. The contact surface between the top plate 6 and the magnetic block is made of magnetic metal material, so that the magnetic block can be attracted to the lower surface of the top plate 6 when it contacts the top plate 6. A handle 306 is fixedly connected to the front surface of the sliding frame 308. The handle 306 facilitates manual upward pulling operation. A rectangular sliding groove is opened at the end of the sliding frame 308 away from the handle 306. The lower end of the airbag 305 is fixedly connected to the workbench 1. The outer surface of the connecting pipe 307 is fixedly connected to the workbench 1. Two sets of one-way valves 302 are symmetrically distributed about the center line of the transmission pipe 301 as the axis of symmetry. The direction of valve 302 is always away from the workbench 1. When the sliding frame 308 is pulled upward by the handle 306, the airbag 305 is stretched and expanded, and the internal volume increases instantaneously to form a local negative pressure suction. Under the one-way control of the one-way valve 302, the airflow is drawn from the dust area on the surface of the workbench 1 through the transmission pipe 301 to the inside of the guide groove 303 to achieve automatic dust suction and cleaning. When the test is completed and the airbag 305 is compressed downward, the gas inside the airbag 305 is switched by the one-way valve 302 and discharged to the outside of the device through the independent channel on the outside of the workbench 1 to prevent secondary pollution of smoke and dust. The guide groove 303 is set at the four corners of the upper surface of the workbench 1. The guide groove 303 facilitates the collection and centralized cleaning of sucked solid impurities.

[0026] Please see the appendix Figure 6 - Appendix Figure 7 The quick-connect component 4 includes a disassembly block 404. An arc-shaped block 401 is fixedly connected to the front surface of the disassembly block 404. The radius of the inner arc surface of the arc block 401 is adapted to the radius of the outer circumference of the blade root 7 to be measured, thereby ensuring the tightness of the surface contact of the clamping interface and preventing local stress concentration. Wedge blocks 403 are slidably connected to both ends of the inner surface of the disassembly block 404. A button 402 is slidably connected to the front surface of the disassembly block 404. The blade root 7 is detachably connected to the arc surface of the arc block 401.

[0027] The electric guide rail inside the support frame 5 has a slot. The left and right sides of the disassembly block 404 have sliding grooves to accommodate the sliding of the wedge block 403. The upper surface of the disassembly block 404 has a sliding groove to accommodate the sliding of the button 402. The lower surface of the button 402 is sloped, and the upper surface of the wedge block 403 has an inclined groove. The sloped surface of the button 402 and the inclined groove of the wedge block 403 fit together to form a reversing transmission from vertical to horizontal. When the button 402 is manually pressed downwards, the sloped surface at the bottom of the button 402 slides and presses against the inclined groove of the wedge block 403, converting the pressing force into a horizontal component force, forcing the wedge blocks on the left and right sides... 403 overcomes the tension of the tail spring and retracts inward to make room, thereby disengaging the head of the wedge block 403 from the slot inside the electric guide rail, releasing the mechanical deadlock state, and allowing the disassembly block 404 to slide freely along the inner side of the support frame 5 to adjust the spacing; after releasing the button 402, the wedge block 403 automatically pops out under the elastic restoring force of the tail spring and re-locks into the slot of the corresponding column position, achieving rapid self-locking. The tail of the wedge block 403 is elastically connected to the disassembly block 404 through the spring. The arc apex of the arc block 401 is provided with a threaded groove, which is used to securely fasten the blade root 7 to the arc block 401 with high-strength bolts.

[0028] Working principle: Before using this device for testing, press down on button 402. The inclined surface of the lower surface of button 402 presses against the inclined groove on the upper surface of wedge 403, forcing wedge 403 to retract into disassembly block 404 against the spring force, thus releasing the locking state between wedge 403 and the electric guide rail slot inside the support frame 5. Slide disassembly block 404 along the electric guide rail to the set position, install blade root 7 on the arc surface of arc block 401, release button 402, and wedge 403 will pop outward under the action of the spring and lock into the slot, completing the positioning of blade root 7. Then pull handle 306 upward, driving sliding frame 308 and connecting block 304 to move upward along the slide groove. The magnetic block on the upper surface of sliding frame 308 is attracted to the lower surface of top plate 6, forming an external shield for the test area. Airbag 305 then stretches and unfolds, increasing its internal volume and generating negative pressure suction. Guided by one-way valve 302, it sucks impurities and debris from the surface of workbench 1 into the inside of guide groove 303 through transmission pipe 301.

[0029] When the loading test is initiated, multiple sets of multi-channel detection components 2 operate collaboratively. Electric push rod one 203 and electric push rod two 204 generate differential displacement, causing the rotating block 206 to rotate relative to the slider 205, adjusting the tilt angle of the extrusion plate 202 to completely conform to the outer contour of the blade root 7. After the conformation angle is locked, the two sets of electric push rods one 203 and electric push rod two 204 extend synchronously and equally, pushing the extrusion plate 202 to maintain a fixed angle and apply a horizontal thrust to the blade root 7, while the stress sensor 207 collects stress data. After the horizontal detection is completed, electric push rod one 203 and electric push rod two 204 retract synchronously to their initial positions. Subsequently, electric push rod three 201 extends downwards independently, driving the lower pressure plate to apply a vertical load to the blade root 7 for downward pressure detection, completing the multi-dimensional stress test of the blade root 7.

[0030] After the testing process is completed, the electric push rod 201 retracts upwards to return to its original position. A downward force is applied to disengage the sliding frame 308 from the top plate 6, causing the airbag 305 to compress and contract, removing the physical obstruction. Under pressure, the internal gas in the airbag 305 is discharged outside the device via the exhaust path set by the one-way valve 302 and the outer channel of the worktable 1. Finally, pressing button 402 again unlocks the device, allowing the quick-connect assembly 4 to move out along the electric guide rail, removing the blade root 7, and restoring the entire device to its initial standby state.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel paired eccentric leaf root five-channel bidirectional composite loading device, comprising a worktable (1), characterized in that, A support frame (5) is fixedly connected to the upper surface of the workbench (1), a top plate (6) is fixedly connected to the upper end of the support frame (5), a reinforcing rib (8) is fixedly connected to the outer side of the support frame (5), an auxiliary shielding component (3) is provided on the upper surface of the workbench (1), a multi-channel detection component (2) is provided on the upper surface of the workbench (1), an electric guide rail is provided on the inner side of the support frame (5), and a quick connection component (4) is provided on the outer side of the electric guide rail. The multi-channel detection assembly (2) includes a pressing plate (202), a pressure sensor (207) is fixedly connected to the outside of the pressing plate (202), an electric push rod (203) is hinged to the side of the pressing plate (202) away from the pressure sensor (207), a rotating block (206) is rotatably connected to the lower end of the pressing plate (202), an electric push rod (204) is hinged to the lower end of the rotating block (206), a slider (205) is rotatably connected to the lower surface of the rotating block (206), and an electric push rod (201) is fixedly connected to the upper part of the support frame (5).

2. The novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 1, characterized in that, The auxiliary shielding component (3) includes a sliding frame (308), a connecting block (304) is slidably connected to the rear end of the sliding frame (308), the end of the connecting block (304) away from the sliding frame (308) is slidably connected to the support frame (5), an airbag (305) is fixedly connected to the lower end of the sliding frame (308), a connecting pipe (307) is fixedly connected to the lower end of the airbag (305), a transmission pipe (301) is connected to the end of the connecting pipe (307) away from the airbag (305), two sets of one-way valves (302) are fixedly connected to the inner surface of the transmission pipe (301), and a guide groove (303) is connected to a branch of the transmission pipe (301).

3. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 1, characterized in that, The quick-connect assembly (4) includes a disassembly block (404), an arc-shaped block (401) is fixedly connected to the front surface of the disassembly block (404), wedges (403) are slidably connected to both ends of the inner surface of the disassembly block (404), a button (402) is slidably connected to the front surface of the disassembly block (404), and a leaf root (7) is detachably connected to the arc surface of the arc-shaped block (401).

4. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 1, characterized in that, The upper surface of the workbench (1) is provided with a sliding groove for sliding the slider (205), and the front surface of the support frame (5) is provided with a sliding groove for sliding the connecting block (304). The multi-channel detection component (2) is provided with multiple sets, and the multiple sets of multi-channel detection components (2) are symmetrically distributed with the center line of the workbench (1) as the axis of symmetry.

5. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 1, characterized in that, The inner surface of the extrusion plate (202) is provided with multiple sets of pressure sensor mounting grooves, and two sets of electric push rods (203) are provided, with the two sets of electric push rods (203) located at the front and rear of the extrusion plate (202) respectively.

6. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 1, characterized in that, The lower surface of the rotating block (206) is provided with a hinge block for connecting with the electric push rod two (204) and rotating with the slider (205). The outer surface of the slider (205) is slidably connected to the worktable (1). The lower surface of the electric push rod three (201) is provided with a rectangular pressure plate.

7. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 2, characterized in that, The auxiliary shielding component (3) is provided in two sets, and the two sets of auxiliary shielding components (3) are located at the front and rear ends of the workbench (1) respectively. A magnetic block is fixedly connected to the upper surface of the sliding frame (308), and a handle (306) is fixedly connected to the front surface of the sliding frame (308). A rectangular sliding groove is opened at the end of the sliding frame (308) away from the handle (306).

8. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 2, characterized in that, The lower end of the airbag (305) is fixedly connected to the workbench (1), the outer surface of the connecting pipe (307) is fixedly connected to the workbench (1), the two sets of one-way valves (302) are symmetrically distributed with the center line of the transmission pipe (301) as the axis of symmetry, the conduction direction of the two sets of one-way valves (302) is away from the workbench (1), and the guide groove (303) is set at the four corners of the upper surface of the workbench (1).

9. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 3, characterized in that, The electric guide rail inside the support frame (5) has a slot, and the left and right sides of the disassembly block (404) have sliding grooves to accommodate the sliding of the wedge block (403). The upper surface of the disassembly block (404) has a sliding groove to accommodate the sliding of the button (402), and the lower surface of the button (402) is formed by an incline.

10. A novel paired eccentric leaf root five-channel bidirectional composite loading device according to claim 3, characterized in that, An inclined groove is provided on the upper surface of the wedge (403), and the tail of the wedge (403) is elastically connected to the disassembly block (404) by a spring. A threaded groove is provided at the top of the arc-shaped block (401).

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