A shield machine polyurethane bearing wheel working condition simulation test bed

Abstract

The application relates to the technical field of detection equipment, in particular to a shield machine polyurethane bearing wheel working condition simulation test bed, which comprises a base, a movable detection table horizontally slidably connected to the base, a gantry fixedly connected to the base and a lifting seat slidably connected to the gantry in the vertical direction, the base is provided with a detection table driving assembly for driving the movable detection table to horizontally reciprocate, and the gantry is provided with a loading assembly for driving the lifting seat to vertically slide, the lifting seat is installed with rubber-encased wheel sets, the rubber-encased wheel sets are arranged in two groups and are symmetrically arranged along the center of the lifting seat, the axes of the rubber-encased wheel sets are arranged to be 45 DEG inclined so that the two groups of rubber-encased wheel sets are arranged in an inverted V shape, and a wedge-shaped track groove arranged in an inverted V shape is arranged on the upper surface of the movable detection table, and the two side slopes of the wedge-shaped track groove are detection slopes for the lower peripheral walls of the rubber-encased wheel sets to abut. The application has the effect of improving the simulation degree of the simulation detection machine.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to a test bench for simulating the working conditions of a polyurethane bearing wheel of a tunnel boring machine. Background Technology

[0002] Tunnel boring machines (TBMs), using the shield tunneling method, play a crucial role in tunnel construction. The shield tunneling method allows the TBM to simultaneously excavate and construct supporting tunnel segments, significantly improving the efficiency and quality of tunnel construction. The multiple trolleys towed behind the TBM carry vital systems such as power, hydraulics, operation, and control; the stable operation of these systems is essential for the normal functioning of the TBM. The rubber-coated wheels at the bottom of the trolleys play a critical role in bearing the weight of the TBM trolleys and equipment and propelling them along the laid tunnel segments. With the continuous development of tunnel construction, the performance and reliability requirements for TBMs are becoming increasingly stringent, which in turn places higher standards on the quality and performance of the rubber-coated wheels. Therefore, accurately testing the performance of the rubber-coated wheels is of great significance for ensuring the normal operation of the TBM and the smooth progress of tunnel engineering.

[0003] During the production or R&D of rubber-coated rollers for tunnel boring machines (TBMs), simulation testing machines are typically used to conduct usage simulation tests to assess the rollers' performance and ensure they meet operational requirements. However, existing simulation testing machines have significant drawbacks. Their simulation fidelity is low, failing to accurately reflect the true performance of the rubber-coated rollers in actual use. Because they cannot comprehensively and realistically simulate the various complex operating conditions of the rubber-coated rollers during TBM trolley operation, the test results deviate significantly from reality, making it difficult to accurately assess whether the rollers' performance meets actual usage requirements. This could potentially pose risks to the operation of the TBM. Utility Model Content

[0004] To improve the simulation accuracy of the simulation testing machine, this application provides a test bench for simulating the working conditions of a tunnel boring machine's polyurethane bearing wheel.

[0005] The technical solution provided in this application for a polyurethane bearing wheel working condition simulation test bench for tunnel boring machines adopts the following: A test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine includes a base, a movable testing platform horizontally slidably connected to the base, a gantry frame fixedly connected to the base, and a lifting seat vertically slidably connected to the gantry frame. The base is equipped with a testing platform drive assembly that drives the movable testing platform to perform horizontal reciprocating motion. The gantry frame is equipped with a loading assembly that drives the lifting seat to slide vertically. The lifting seat is equipped with rubber-coated wheel sets. Two sets of rubber-coated wheel sets are symmetrically arranged along the center of the lifting seat. The axes of the rubber-coated wheel sets are inclined at 45° so that the two sets of rubber-coated wheel sets are distributed in an inverted V-shape. The upper surface of the movable testing platform is correspondingly provided with a wedge-shaped track groove arranged in an inverted V-shape. The two inclined surfaces on both sides of the wedge-shaped track groove are testing inclined surfaces for the lower peripheral wall of the rubber-coated wheel set to abut.

[0006] By adopting the above technical solution, during operation, two sets of inclined rubber-coated wheel sets are pressed against the wedge-shaped track groove detection ramp of the mobile detection platform by the loading component, which is equivalent to the shield tunneling machine wheels pressing on the track. The mobile detection platform reciprocates on the base, causing the detection ramp to slide horizontally relative to the pressed rubber-coated wheel sets, thereby causing the rubber-coated wheel sets to roll. By using the inverted V-shaped distribution of the rubber-coated wheel sets in conjunction with the inverted V-shaped wedge-shaped track groove, the working conditions of the shield tunneling machine's rubber-coated wheels in actual use are simulated, improving the simulation accuracy and more accurately detecting the various performance characteristics of the rubber-coated wheels.

[0007] Preferably, a linear guide rail is fixedly connected to the upper end face of the base. The length direction of the linear guide rail is parallel to the length direction of the base. Multiple linear guide rails are provided and evenly distributed along the width direction of the base. A slider that is slidably connected to the linear guide rail is fixedly connected to the lower end face of the moving detection stage.

[0008] By adopting the above technical solution, multiple linear guide rails are set on the base, which are evenly distributed along the width direction and parallel to the length direction of the base. The slider on the lower end face of the moving detection stage is slidably connected to the linear guide rails, which makes the horizontal reciprocating motion of the moving detection stage on the base more stable and smooth.

[0009] Preferably, the detection inclined surface of the wedge-shaped track groove is provided with a stepped portion.

[0010] By adopting the above technical solution, a stepped section is protruded on the detection slope of the wedge-shaped track groove to simulate the misalignment phenomenon between actual tunnel segments. When the rubber-coated wheel assembly rolls on the detection slope, it needs to climb the stepped section, which generates impact loads and additional tire deformation. This further simulates the use of the rubber-coated wheel under complex actual working conditions, improves the simulation accuracy of the testing machine, and more accurately detects the various performance characteristics of the rubber-coated wheel.

[0011] Preferably, the detection ramp of the wedge-shaped track groove is fixedly connected to a step plate by bolts, and the step plate forms a step portion.

[0012] By adopting the above technical solution, the step plate is fixed to the detection slope with bolts to form a step section, which can simulate more complex actual working conditions, improve the simulation degree of the detection machine, and the bolt connection method facilitates the installation and disassembly of the step plate, making it convenient to maintain or replace step plates of different thicknesses, thereby changing the thickness of the step section.

[0013] Preferably, the movable testing platform has an inverted V-shaped mounting cavity, and the testing slope has a sliding groove communicating with the mounting cavity. The movable testing platform is provided with a movable plate that is slidably connected to the sliding groove. The upper surface of the movable plate can slide out of the testing slope to form a step. The movable testing platform is provided with an adjustment mechanism that adjusts the sliding position of the movable plate to adjust the thickness of the step.

[0014] By adopting the above technical solution, the sliding position of the movable plate in the sliding groove is adjusted by the adjustment mechanism. On the one hand, the upper surface of the movable plate can slide and protrude out of the detection slope to form a step, and the thickness of the step can be adjusted to simulate the working conditions of steps with different thicknesses, thereby improving the simulation degree of the simulation detection machine. On the other hand, it realizes the switching between the rubber-coated wheel set in the working conditions of traveling on a flat road surface and crossing step differences.

[0015] Preferably, the adjustment mechanism includes a fixed rod built into the mounting cavity and fixedly connected to the bottom surface of the movable plate, a swing arm located below the fixed rod and hinged in the middle to the inner wall of the mounting cavity, a first hinge rod with both ends respectively hinged between the end of the swing arm and the fixed rod, an active plate built into the mounting cavity and sliding vertically, a second hinge rod with both ends respectively hinged between the other end of the swing arm and the active plate, and a lifting drive assembly for driving the active plate to move up and down. The fixed rod, swing arm, first hinge rod, and second hinge rod are each provided in two sets and symmetrically arranged along the center line of the moving detection table. The active plate and the lifting drive assembly are provided in one set, and the two second hinge rods are respectively hinged to both sides of the active plate.

[0016] By adopting the above technical solution, a set of lifting drive components is used to drive the active plate to rise and fall. The sliding position of the movable plate on the two detection inclined planes can be adjusted synchronously by the second hinge rod, swing arm, first hinge rod and fixed rod on both sides, thereby adjusting the thickness of the step.

[0017] Preferably, the lifting drive assembly includes a lead screw arranged vertically and rotatably connected to the inner wall of the mounting cavity, a first bevel gear coaxially fixedly sleeved on the lead screw, a drive rod arranged horizontally and rotatably passing through the side wall of the mounting cavity, and a second bevel gear coaxially fixedly sleeved on the drive rod, the second bevel gear meshing with the first bevel gear, and a handwheel externally mounted on the movable detection table fixedly connected to the end of the drive rod.

[0018] By adopting the above technical solution, the lifting drive assembly can easily drive the lead screw to rotate through the cooperation of the lead screw, the first bevel gear, the drive rod, the second bevel gear and the handwheel, thereby adjusting the sliding position of the movable plate and realizing the adjustment of the thickness of the step section. This allows for the simulation of different working conditions to test the rubber-coated wheel, improving the simulation degree and testing accuracy of the simulation testing machine.

[0019] Preferably, the lower outer side of the lifting seat is provided with a wheel groove, the lifting seat is provided with a mounting frame that is slidably connected to the wheel groove, the rubber-coated wheel set is rotatably connected to the mounting frame, and a spring is fixedly connected between the wheel groove and the mounting frame.

[0020] By adopting the above technical solution, a spring is added. In the detection state, the spring is in a compressed state and the rubber-coated wheel assembly is under a set load. When the rubber-coated wheel assembly crosses the step and is impacted by the step, the mounting bracket can further compress the spring. At this time, the mounting bracket and the rubber-coated wheel assembly as a whole can move slightly upward to make way so as not to be rigidly restricted, thus avoiding overload caused by complete rigid contact.

[0021] Preferably, the upper end face of the base is provided with a platform slide groove, the lower end face of the movable testing table is fixedly connected to a fixed block that moves in the platform slide groove, and the testing table drive assembly includes a platform reciprocating cylinder, the cylinder body of the platform reciprocating cylinder is fixedly embedded in the platform slide groove, and the piston rod of the platform reciprocating cylinder is fixedly connected to the fixed block.

[0022] By adopting the above technical solution, the platform reciprocating cylinder drives the piston rod to extend and retract, and the piston rod drives the fixed block to move in the platform slide groove, thereby driving the mobile testing table to perform horizontal reciprocating motion on the base, realizing the driving function of the horizontal reciprocating motion of the mobile testing table. Moreover, the platform slide groove plays a guiding role in the movement of the fixed block, ensuring the stability of the movement of the mobile testing table.

[0023] Preferably, the gantry includes a pair of columns fixedly connected to the outer walls of both sides of the base and a crossbeam fixedly connected between the upper parts of the two columns. The loading assembly includes a loading cylinder, the cylinder body of which is fixedly connected to the crossbeam, and the piston rod of which passes through the crossbeam and is fixedly connected to the lifting seat.

[0024] By adopting the above technical solution, the piston rod of the loading cylinder drives the lifting seat to move quickly down to the rubber-coated wheel assembly and then to the detection slope. Then, it switches to the pressure control mode and gradually increases the pressure to the set load, thereby simulating the stress situation of the rubber-coated wheel of the tunnel boring machine in actual use, improving the simulation degree of the detection machine, and more accurately detecting the performance of the rubber-coated wheel.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. During operation, two sets of inclined rubber-coated wheel sets are pressed against the wedge-shaped track groove detection ramp of the moving detection platform by the loading component, which is equivalent to the shield tunneling machine wheels pressing on the track. The moving detection platform reciprocates on the base, causing the detection ramp to slide horizontally relative to the pressed rubber-coated wheel sets, thereby making the rubber-coated wheel sets roll. By using the inverted V-shaped distribution of the rubber-coated wheel sets in conjunction with the inverted V-shaped wedge-shaped track groove, the working conditions of the shield tunneling machine's rubber-coated wheels in actual use are simulated, improving the simulation accuracy and more accurately detecting the various performance characteristics of the rubber-coated wheels; 2. The sliding position of the movable plate in the sliding groove is adjusted by the adjustment mechanism. On the one hand, the upper surface of the movable plate can slide and protrude out of the detection slope to form a step, and the thickness of the step can be adjusted to simulate the working conditions of steps with different thicknesses, thus improving the simulation accuracy of the simulation testing machine. On the other hand, it realizes the switching between the rubber-coated wheel set in the working conditions of traveling on a flat road surface and crossing step differences. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a test bench for simulating the working conditions of a polyurethane bearing wheel of a tunnel boring machine, as shown in Example 1.

[0027] Figure 2 This is a schematic diagram of the base structure in Example 1.

[0028] Figure 3 This is a schematic diagram of the lifting seat in Example 1.

[0029] Figure 4 This is a schematic diagram of the wheel axle and limiting plate in Example 1.

[0030] Figure 5 This is a schematic diagram of the structure of the mobile detection station in Example 2.

[0031] Figure 6 This is a schematic diagram of the structure of the mobile detection station in Example 3.

[0032] Figure 7 This is a schematic diagram of the adjustment mechanism in Example 3.

[0033] Figure 8 yes Figure 7 A magnified view of a portion at point A.

[0034] Figure 9 This is a schematic diagram of the connection structure of the rubber-coated wheel assembly in Example 4.

[0035] Explanation of reference numerals in the attached drawings: 1. Base; 11. Linear guide rail; 12. Platform slide rail; 13. Platform reciprocating cylinder; 2. Moving inspection table; 21. Slider; 22. Fixing block; 23. Wedge-shaped track groove; 231. Sliding groove; 24. Step plate; 25. Connecting plate; 26. Mounting cavity; 27. Movable plate; 3. Gantry frame; 31. Column; 32. Crossbeam; 33. Loading cylinder; 4. Lifting seat; 41. Guide rod; 42. Wheel groove; 43. 431. Mounting plate; 44. Shaft groove; 45. Wheel axle; 46. Limiting slot; 47. Limiting plate; 5. Mounting bracket; 68. Spring; 69. Rubber-coated wheel set; 60. Adjustment mechanism; 61. Fixed rod; 62. Swing arm; 63. First hinge rod; 64. Active plate; 65. Second hinge rod; 66. Lifting drive assembly; 661. Lead screw; 662. First bevel gear; 663. Drive rod; 664. Second bevel gear; 665. Handwheel. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0037] Example 1: This application discloses a simulation test bench for the working conditions of a polyurethane bearing wheel of a tunnel boring machine, with reference to... Figure 1 It includes a base 1, a movable testing platform 2 that is horizontally slidably connected to the upper surface of the base 1, a gantry frame 3 that is fixedly connected to the base 1, and a lifting seat 4 that is vertically slidably connected to the gantry frame 3.

[0038] Reference Figure 1 , Figure 2 A linear guide rail 11 is fixedly connected to the upper end face of the base 1. The linear guide rail 11 is a heavy-duty steel rail, and its length direction is parallel to the length direction of the base 1. Multiple linear guide rails 11 are provided and evenly distributed along the width direction of the base 1. A slider 21 that slides on the linear guide rail 11 is fixedly connected to the lower end face of the moving detection table 2. Multiple sliders 21 cooperate with one linear guide rail 11. A platform groove 12 extending along the length direction is opened in the middle of the upper end face of the base 1. A fixed block 22 that moves within the platform groove 12 is fixedly connected to the lower end face of the moving detection table 2. The base 1 is provided with a detection table drive assembly that drives the moving detection table 2 to perform horizontal reciprocating motion. In this embodiment, the detection table drive assembly is a platform reciprocating hydraulic cylinder 13. The cylinder body of the platform reciprocating hydraulic cylinder 13 is fixedly embedded in the platform groove 12, and the piston rod of the platform reciprocating hydraulic cylinder 13 is fixedly connected to the fixed block 22.

[0039] The gantry frame 3 includes a pair of columns 31 fixedly connected to the outer walls of both sides of the base 1, and a crossbeam 32 fixedly connected between the upper parts of the two columns 31. The lifting seat 4 is located between the two columns 31. A guide rod 41 that slides through the crossbeam 32 is fixedly connected to the upper end face of the lifting seat 4. There are two guide rods 41, which are symmetrical along the center line of the lifting seat 4. The gantry frame 3 is provided with a loading assembly for driving the lifting seat 4 to slide vertically. In this embodiment, the loading assembly is a loading cylinder 33. The cylinder body of the loading cylinder 33 is fixedly connected to the upper end face of the middle part of the crossbeam 32, and the piston rod of the loading cylinder 33 passes through the crossbeam 32 and is fixedly connected to the upper end face of the lifting seat 4.

[0040] Reference Figure 3 , Figure 4 The lifting seat 4 is equipped with two sets of rubber-coated wheels 5, which are symmetrically arranged around the center of the lifting seat 4. The axis of the rubber-coated wheels 5 is inclined at 45°, so that the two sets of rubber-coated wheels 5 are distributed in an inverted V-shape. In this embodiment, a wheel groove 42 is opened on the lower outer side of the lifting seat 4. Mounting plates 43 are fixedly connected to both sides of the wheel groove 42. A shaft groove 431 is opened at the lower end of the mounting plate 43. A wheel axle 44 is installed between the shaft grooves 431 of the two mounting plates 43. The rubber-coated wheels 5 are rotatably sleeved on the wheel axle 44. A limiting groove 441 is opened on the outer peripheral wall of the end of the wheel axle 44, located on the outside of the mounting plate 43. A limiting plate 45 is hinged to the outer wall of the mounting plate 43 and is locked in the limiting groove 441. The hinged end of the limiting plate 45 is located on one side of the shaft groove 431. The free end of the limiting plate 45 is fixedly connected to the mounting plate 43 by bolts. The upper surface of the mobile testing platform 2 is provided with a wedge-shaped track groove 23 arranged in an inverted V shape. The two inclined surfaces of the wedge-shaped track groove 23 are testing inclined surfaces for the lower peripheral wall of the rubber-coated wheel assembly 5 to abut.

[0041] The implementation principle of the shield machine polyurethane bearing wheel working condition simulation test bench in this application embodiment is as follows: During the test, the piston rod of the loading cylinder 33 drives the lifting seat 4 to move quickly down until the rubber-coated wheel set 5 abuts against the test slope. Then, it switches to the pressure control mode and gradually increases the pressure to the set load, thereby simulating the load condition of the shield machine rubber-coated wheel in actual use. Then, the piston rod of the platform reciprocating cylinder 13 drives the moving test table 2 to reciprocate on the base 1, causing the test slope to slide horizontally relative to the pressed rubber-coated wheel set 5, thereby causing the rubber-coated wheel set 5 to roll. By using the rubber-coated wheel set 5 distributed in an inverted V-shape and the wedge-shaped track groove 23 set in an inverted V-shape, the working condition of the shield machine rubber-coated wheel in actual use is simulated, improving the simulation degree of the test and accurately detecting the various performance of the rubber-coated wheel.

[0042] Example 2: Furthermore, referring to Figure 5To simulate the misalignment phenomenon between actual tunnel segments and further improve the simulation accuracy of the inspection machine, a stepped portion is protruding from the inspection slope of the wedge-shaped track groove 23. In this embodiment, a stepped plate 24 is bolted to the inspection slope of the wedge-shaped track groove 23, forming a stepped portion. A connecting plate 25 is fixedly connected between the stepped plates 24 on the two inspection slopes, and the connecting plate 25 abuts against the bottom wall of the wedge-shaped track groove 23. The thickness of the stepped portion can be changed by replacing the stepped plates 24 with different thicknesses.

[0043] Example 3: The difference from Example 2 is that, referring to Figure 6 , Figure 7 , Figure 8 The mobile testing platform 2 has an inverted V-shaped mounting cavity 26. The testing slope has a sliding groove 231 that communicates with the mounting cavity 26. The mobile testing platform 2 is provided with a movable plate 27 that is slidably connected to the sliding groove 231. The upper end surface of the movable plate 27 can slide out of the testing slope to form a step. The mobile testing platform 2 is provided with an adjustment mechanism 6 that adjusts the sliding position of the movable plate 27 to adjust the thickness of the step.

[0044] The adjustment mechanism 6 includes a fixed rod 61 built into the mounting cavity 26 and fixedly connected to the bottom surface of the movable plate 27, a swing arm 62 located below the fixed rod 61 and hinged in the middle to the inner wall of the mounting cavity 26, a first hinge rod 63 with both ends respectively hinged between the end of the swing arm 62 and the fixed rod 61, an active plate 64 built into the mounting cavity 26 and sliding vertically, a second hinge rod 65 with both ends respectively hinged between the other end of the swing arm 62 and the active plate 64, and a lifting drive assembly 66 for driving the active plate 64 to move up and down. The fixed rod 61, the swing arm 62, the first hinge rod 63, and the second hinge rod 65 are each provided in two sets and are symmetrically arranged along the center line of the moving detection table 2. The active plate 64 and the lifting drive assembly 66 are provided in one set. The two second hinge rods 65 are respectively hinged to both sides of the active plate 64.

[0045] The lifting drive assembly 66 includes a lead screw 661 that is vertically arranged and rotatably connected to the inner wall of the mounting cavity 26, a first bevel gear 662 that is coaxially fixedly sleeved on the lead screw 661, a drive rod 663 that is horizontally arranged and rotatably passes through the side wall of the mounting cavity 26, and a second bevel gear 664 that is coaxially fixedly sleeved on the drive rod 663. The second bevel gear 664 meshes with the first bevel gear 662. A handwheel 665 that is externally placed on the movable detection stage 2 is fixedly connected to the end of the drive rod 663.

[0046] The implementation principle of this application embodiment is as follows: the drive rod 663 is rotated by the handwheel 665, and the lead screw 661 is driven to rotate around its own axis by the second bevel gear 664. The active plate 64 slides vertically under the thread restriction of the lead screw 661, thereby adjusting the sliding position of the movable plate 27 on the two detection inclined surfaces synchronously by the second hinge rod 65, the swing arm 62, the first hinge rod 63 and the fixed rod 61 on both sides, thereby adjusting the thickness of the step portion.

[0047] Example 4: Furthermore, referring to Figure 9 To prevent rigid contact and overload when the rubber-coated wheel assembly 5 crosses a step, in this embodiment, the lifting seat 4 is equipped with a mounting bracket 46 that slides onto the wheel groove 42. The wheel axle 44 is mounted on the mounting bracket 46, and a spring 47 is fixedly connected between the wheel groove 42 and the mounting bracket 46. In the detection state, the spring 47 is compressed and the rubber-coated wheel assembly 5 is under a set load. When the rubber-coated wheel assembly 5 crosses the step and is impacted by the step, the mounting bracket 46 can further compress the spring 47. At this time, the mounting bracket 46 and the rubber-coated wheel assembly 5 can move slightly upward to make way and avoid being rigidly restricted, thus avoiding overload caused by complete rigid contact. In other embodiments, a pressure sensor can be added to the circuit of the loading cylinder 33 to monitor the impact force in real time. When a sudden increase in pressure is detected, the loading cylinder 33 is switched to displacement control mode by the PLC control system, allowing the lifting seat 4 to move upward briefly to avoid the impact.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine, characterized in that: The device includes a base (1), a mobile testing platform (2) that slides horizontally to the base (1), a gantry frame (3) that is fixedly connected to the base (1), and a lifting seat (4) that slides vertically to the gantry frame (3). The base (1) is provided with a testing platform drive assembly that drives the mobile testing platform (2) to perform horizontal reciprocating motion. The gantry frame (3) is provided with a loading assembly that drives the lifting seat (4) to slide vertically. The lifting seat (4) is equipped with a rubber-coated wheel set (5). There are two sets of rubber-coated wheel sets (5) that are symmetrically arranged along the center of the lifting seat (4). The axis of the rubber-coated wheel set (5) is inclined at 45° so that the two sets of rubber-coated wheel sets (5) are arranged in an inverted V shape. The upper surface of the mobile testing platform (2) is correspondingly provided with a wedge-shaped track groove (23) arranged in an inverted V shape. The two inclined surfaces of the wedge-shaped track groove (23) are testing inclined surfaces for the lower peripheral wall of the rubber-coated wheel set (5) to abut.

2. The test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 1, characterized in that: The upper end face of the base (1) is fixedly connected to a linear guide rail (11). The length direction of the linear guide rail (11) is parallel to the length direction of the base (1). Multiple linear guide rails (11) are provided and are evenly distributed along the width direction of the base (1). The lower end face of the moving detection stage (2) is fixedly connected to a slider (21) that is slidably connected to the linear guide rail (11).

3. The test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 1, characterized in that: The wedge-shaped track groove (23) has a stepped section protruding from its detection inclined surface.

4. The test rig for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 3, characterized in that: The detection ramp of the wedge-shaped track groove (23) is fixedly connected to a step plate (24) by bolts, and the step plate (24) forms a step section.

5. The test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 3, characterized in that: The mobile testing platform (2) has an installation cavity (26) arranged in an inverted V shape. The testing slope is provided with a sliding groove (231) that communicates with the installation cavity (26). The mobile testing platform (2) is provided with a movable plate (27) that is slidably connected to the sliding groove (231). The upper end surface of the movable plate (27) can slide out of the testing slope to form a step. The mobile testing platform (2) is provided with an adjustment mechanism (6) that adjusts the sliding position of the movable plate (27) to adjust the thickness of the step.

6. The test rig for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 5, characterized in that: The adjustment mechanism (6) includes a fixed rod (61) built into the mounting cavity (26) and fixedly connected to the bottom surface of the movable plate (27); a swing arm (62) located below the fixed rod (61) and hinged in the middle to the inner wall of the mounting cavity (26); a first hinge rod (63) with both ends hinged between the end of the swing arm (62) and the fixed rod (61); an active plate (64) built into the mounting cavity (26) and sliding vertically; and a control plate (64) with both ends hinged to the other end of the swing arm (62) and the fixed rod (61). The second hinge rod (65) between the active plate (64) and the lifting drive assembly (66) that drives the active plate (64) to rise and slide, the fixed rod (61), the swing arm (62), the first hinge rod (63) and the second hinge rod (65) are all provided in two sets and are symmetrically arranged along the center line of the moving detection table (2). The active plate (64) and the lifting drive assembly (66) are provided in one set. The two second hinge rods (65) are respectively hinged to both sides of the active plate (64).

7. The test rig for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 6, characterized in that: The lifting drive assembly (66) includes a lead screw (661) that is vertically arranged and rotatably connected to the inner wall of the mounting cavity (26), a first bevel gear (662) that is coaxially fixedly sleeved on the lead screw (661), a drive rod (663) that is horizontally arranged and rotatably passed through the side wall of the mounting cavity (26), and a second bevel gear (664) that is coaxially fixedly sleeved on the drive rod (663). The second bevel gear (664) meshes with the first bevel gear (662), and a handwheel (665) that is externally placed on the moving detection table (2) is fixedly connected to the end of the drive rod (663).

8. The test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 3, characterized in that: The lower outer side of the lifting seat (4) is provided with a wheel groove (42), and the lifting seat (4) is provided with a mounting frame (46) that is slidably connected to the wheel groove (42). The rubber-coated wheel set (5) is rotatably connected to the mounting frame (46), and a spring (47) is fixedly connected between the wheel groove (42) and the mounting frame (46).

9. The test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 1, characterized in that: The upper end face of the base (1) is provided with a platform slide groove (12), and the lower end face of the moving detection table (2) is fixedly connected to a fixed block (22) that moves in the platform slide groove (12). The detection table drive assembly includes a platform reciprocating cylinder (13), the cylinder body of the platform reciprocating cylinder (13) is fixedly embedded in the platform slide groove (12), and the piston rod of the platform reciprocating cylinder (13) is fixedly connected to the fixed block (22).

10. The test bench for simulating the working conditions of a polyurethane bearing wheel for a tunnel boring machine according to claim 1, characterized in that: The gantry (3) includes a pair of columns (31) fixedly connected to the outer walls of the base (1) on both sides, and a crossbeam (32) fixedly connected between the upper parts of the two columns (31). The loading assembly includes a loading cylinder (33), the cylinder body of the loading cylinder (33) is fixedly connected to the crossbeam (32), and the piston rod of the loading cylinder (33) passes through the crossbeam (32) and is fixedly connected to the lifting seat (4).

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