A shield machine assembly performance testing device

Abstract

The present application relates to the field of shield machine testing equipment, specifically is a kind of shield machine component performance testing equipment, including the base frame of L-shaped structure, the horizontal section of base frame is slidably connected with support plate left and right, its vertical section is rotatably connected with U-shaped frame, U-shaped frame and support plate are provided with pseudo mechanism for impacting and wearing test of cutter on it, limiting mechanism for limiting cutter is arranged on U-shaped frame, the rotating cylinder of the present application is intermittently driven by driving assembly, drives the impact ball at the end of swing rod to rise to set height, by the way of accumulating gravitational potential energy and converting into kinetic energy, impact ball violently impacts cutter surface in the form of free swing, this process highly simulates the instantaneous, high-energy impact working condition of falling stone on cutter blade circle in tunneling, effectively reveals the real damage mode of micro-crack, collapse or structural failure caused by impact load to cutter, significantly improves the pseudo of impact test.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine testing equipment, specifically a tunnel boring machine component performance testing device. Background Technology

[0002] As a key piece of equipment for the development of underground space and the construction of tunnels in modern cities, the tunneling performance of tunnel boring machines (TBMs) is directly related to the efficiency and safety of the project. In the cutterhead system of the TBM, the cutter head is the core component that directly contacts and breaks the rock and soil. Its performance has a decisive impact on the tunneling speed, the frequency of cutter replacement, and even the overall project cost. Therefore, it is crucial to conduct scientific and accurate testing and evaluation of the impact resistance and wear resistance of the cutter head under actual complex working conditions during the design, manufacturing, and selection process.

[0003] Currently, there are various testing equipment and methods for testing the performance of tunnel boring machine cutters. Conventional testing equipment mainly focuses on simulating the static or quasi-static loads borne by the cutters during tunneling. For example, radial pressure is applied to the fixed cutters using hydraulic cylinders or presses to test their ultimate bearing capacity or deformation. In addition, there are also devices that drive the cutters to rotate and make them contact specific abrasives or friction plates to simulate the wear process of the cutters in uniform rock strata, thereby evaluating their wear resistance.

[0004] However, in actual engineering, the cutter not only bears the continuous compression and frictional wear from the rock strata, but also frequently encounters the impact of rocks caused by rock collapses, as well as the severe alternating wear loads experienced when tunneling in rock strata of different hardness. This makes the existing cutter performance testing equipment significantly inadequate in simulating the complexity and realism of the actual tunneling environment.

[0005] On the one hand, they generally lack an effective mechanism to simulate the instantaneous, high-energy impact of falling rocks on the cutter head, and cannot truly reflect the impact of impact loads on the micro-cracks, chipping, or overall failure of the cutter head. On the other hand, existing wear tests are usually based on preset constant friction conditions, and cannot dynamically simulate the rapidly changing load forces that the cutter head bears when tunneling through rock strata with significant differences in softness and hardness. This results in a large deviation between the test results and the actual performance of the cutter head under working conditions, reducing the accuracy of the test evaluation. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a shield tunneling machine component performance testing device, including an L-shaped base frame, a support plate slidably connected to the horizontal section of the base frame, a U-shaped frame rotatably connected to the vertical section of the base frame, a simulation mechanism for impact and wear testing of the cutter head jointly provided on the U-shaped frame and the support plate, and a limiting mechanism for limiting the cutter head provided on the U-shaped frame.

[0007] The simulation mechanism includes a rotating cylinder rotatably mounted on the right side of the support plate, a swing rod fixedly mounted on the outside of the rotating cylinder and arranged radially thereon, an impact ball rotatably mounted at the end of the swing rod away from the rotating cylinder, and a drive assembly for driving the rotating cylinder to rotate on the support plate.

[0008] During testing, the drive component intermittently rotates the rotating cylinder, causing the rotating cylinder to lift the impact ball via the swing rod, thereby increasing the potential energy of the impact ball. Subsequently, the impact ball swings under the action of gravity and impacts the roller cutter, simulating the impact of a falling stone on the roller cutter.

[0009] The simulation mechanism also includes a clamping block mounted on a U-shaped frame via a movable component, and the clamping block is provided with a friction plate for rubbing the roller cutter.

[0010] As a preferred embodiment of the present invention, the limiting mechanism includes a bearing plate fixedly installed between two horizontal sections of the U-shaped frame. Two sliding frames arranged in a front-to-back manner are provided on the left side of the bearing plate. The rear sliding frame is fixedly connected to the bearing plate, and the front sliding frame is slidably connected to the bearing plate in a front-to-back manner.

[0011] As a preferred embodiment of the present invention, a rotating tube is rotatably provided on the left side of the sliding frame, and an asynchronous motor is fixedly installed on the horizontal section at the rear of the U-shaped frame, with the output shaft of the asynchronous motor being fixedly connected to the rotating tube at the rear.

[0012] As a preferred embodiment of the present invention, a distance sensor is fixedly installed on the support plate, and a hydraulic cylinder is fixedly installed on the right side of the support plate. The telescopic section of the hydraulic cylinder is fixedly connected to the sliding frame at the front.

[0013] As a preferred embodiment of the present invention, a rocking plate is fixedly installed on the right side of the U-shaped frame, and a second hydraulic cylinder is hinged to the upper side of the base frame. The extension section of the second hydraulic cylinder is hinged to the rocking plate.

[0014] As a preferred embodiment of the present invention, a linkage rod is fixedly installed on the right side of the U-shaped frame, and two limiting rods symmetrically arranged front and back are fixedly installed on the right side of the vertical section of the base frame, with the linkage rod located between the two limiting rods.

[0015] As a preferred embodiment of the present invention, the driving assembly includes a synchronous motor fixedly installed on the left side of the support plate. The output shaft of the synchronous motor is arranged coaxially inside the rotating cylinder. A push block is fixedly installed on the output shaft of the synchronous motor, and a movable square rod is slidably arranged on the rotating cylinder along its radial direction.

[0016] As a preferred embodiment of the present invention, a track groove plate is fixedly installed on the right side of the support plate, and a protruding rod is fixedly installed on the side of the movable square rod away from the axis of the rotating cylinder, and the protruding rod is slidably connected inside the track groove plate.

[0017] As a preferred embodiment of the present invention, the moving component includes a moving plate that is slidably mounted on a U-shaped frame, the moving plate being slidably connected to a retaining block, a helical spring being provided between the moving plate and the retaining block, an arc-shaped plate being fixedly mounted on the left side of the moving plate, and a roller being rotatably mounted on the swing rod.

[0018] As a preferred embodiment of the present invention, the impact ball is provided with a plurality of pointed blocks arranged radially along the swing rod at equal intervals along the circumference of the swing rod, and a push spring is provided between the pointed blocks and the impact ball, and a dovetail groove plate is slidably connected to the middle of the support plate.

[0019] The beneficial effects of this invention are as follows: First, this invention uses a drive component to intermittently drive the rotating cylinder to rotate, which drives the impact ball at the end of the swing rod to rise to a set height. By accumulating gravitational potential energy and converting it into kinetic energy, the impact ball violently impacts the cutter surface in a free swinging manner. This process highly simulates the instantaneous, high-energy impact condition of falling rocks on the cutter cutting ring during tunnel excavation, effectively revealing the real damage modes such as microcracks, chipping, or structural failure caused by impact loads on the cutter, and significantly improving the simulation of impact testing.

[0020] Second, this invention uses a moving component to drive the clamping block and friction plate to press against the cutter blade for wear testing. The movement trajectory of the swing rod is linked with the moving component to achieve intermittent dynamic enhancement of the pressure applied by the friction plate to the cutter. This accurately simulates the rapid alternating load force that the cutter bears when tunneling in alternating soft and hard rock strata, overcoming the limitation of existing equipment that can only provide constant friction conditions, and making the wear test closer to the actual complex working conditions.

[0021] Third, this invention employs elastically extendable pointed blocks circumferentially on the surface of the impact ball to simulate the scratch-like wear caused by the sharp edges of stones on the roller cutter at the moment of impact. At the same time, combined with the dovetail groove plate on the support plate to limit the swing rod, the impact ball can roll along the surface of the roller cutter after impact, effectively simulating the continuous scraping wear caused by the falling stones remaining on the roller cutter and rotating with the cutter head, greatly enriching the simulation dimensions of wear patterns.

[0022] Fourth, by controlling the extension and retraction stroke of the second hydraulic cylinder, the U-shaped frame carrying the cutter head is driven to reciprocate, allowing the cutter head to undergo impact and wear tests at different tilt angles. This realistically reproduces the multi-angle impact loads that the cutter head experiences due to changes in cutterhead posture or uneven rock strata during actual tunneling, thus comprehensively improving the coverage of the test scenarios. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the U-shaped frame, rotating pipe, arc plate and clamping block in this invention.

[0026] Figure 3 This is a top view of the U-shaped frame, sliding frame, distance sensor, and hydraulic cylinder No. 1 in this invention.

[0027] Figure 4 This is a schematic diagram of the structure of the support plate, rotating cylinder, swing rod and impact ball in this invention.

[0028] Figure 5 This is a partial fracture cross-sectional view of the rotating cylinder, swing rod, pointed block, and moving square rod in this invention.

[0029] Figure 6 This is a partial cross-sectional view of the trajectory groove plate, the protruding rod, the movable square rod, and the rotating cylinder in this invention.

[0030] Figure 7 This is a schematic diagram of the U-shaped frame in this invention.

[0031] Figure 8 This is a schematic diagram of the structure of the bearing plate, sliding frame and hydraulic cylinder No. 1 in this invention.

[0032] In the diagram: 1. Base frame; 2. U-shaped frame; 3. Support plate; 4. Simulation mechanism; 5. Limiting mechanism; 21. Swing plate; 22. No. 2 hydraulic cylinder; 23. Linkage rod; 24. Limiting rod; 31. Dovetail groove plate; 41. Rotating cylinder; 42. Swing rod; 43. Impact ball; 44. Drive assembly; 45. Moving assembly; 46. Pressing block; 47. Friction plate; 51. Bearing plate; 52. Sliding frame; 53. Rotating tube; 54. Asynchronous motor; 55. No. 1 hydraulic cylinder; 311. Electric push rod; 431. Pointed block; 441. Synchronous motor; 442. Push block; 443. Moving square rod; 444. Track groove plate; 445. Protruding rod; 451. Moving plate; 452. Arc plate; 453. Roller; 454. Driven plate; 511. Distance sensor; 521. Wedge plate. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0034] See Figure 1 and Figure 7A shield tunneling machine component performance testing device includes an L-shaped base frame 1, a support plate 3 that slides horizontally on the horizontal section of the base frame 1, a U-shaped frame 2 that is rotatably connected on the vertical section of the base frame 1, a simulation mechanism 4 for impact and wear testing of the cutter head is provided on the U-shaped frame 2 and the support plate 3, and a limiting mechanism 5 for limiting the cutter head is provided on the U-shaped frame 2.

[0035] When testing the hob, the operator first fixes the hob on the limiting mechanism 5, then drives the hob to rotate through the limiting mechanism 5, and then simulates the actual working conditions of the hob through the simulation mechanism 4 to conduct impact and wear tests.

[0036] See Figure 1 , Figure 2 and Figure 3 The limiting mechanism 5 includes a bearing plate 51 fixedly installed between two horizontal sections of the U-shaped frame 2. Two sliding frames 52 arranged in a front-to-back manner are provided on the left side of the bearing plate 51. The rear sliding frame 52 is fixedly connected to the bearing plate 51, and the front sliding frame 52 is slidably connected to the bearing plate 51 in a front-to-back manner.

[0037] See Figure 2 , Figure 3 and Figure 8 A rotating tube 53 is rotatably mounted on the left side of the sliding frame 52. An asynchronous motor 54 is fixedly installed on the horizontal section at the rear of the U-shaped frame 2. The output shaft of the asynchronous motor 54 is fixedly connected to the rotating tube 53 at the rear. A distance sensor 511 is fixedly installed on the bearing plate 51. A hydraulic cylinder 55 is fixedly installed on the right side of the bearing plate 51. The telescopic section of the hydraulic cylinder 55 is fixedly connected to the sliding frame 52 at the front.

[0038] It should be noted that the distance sensor 511 is specifically a laser rangefinder or an infrared rangefinder.

[0039] When testing the hob, the operator holds the hob between the two sliding frames 52, inserting the rear of the hob into the rear rotating tube 53. This makes the hob and the rotating tube 53 coaxial. Then, the telescopic section of the first hydraulic cylinder 55 is retracted, causing the first hydraulic cylinder 55 to move the front sliding frame 52 backward. This causes the sliding frame 52 to move the rotating tube 53 on it to fit over the front of the hob, thus fixing the hob and the two rotating tubes 53 together.

[0040] When the hob is fixedly connected to the two rotating tubes 53, the distance sensor 511 corresponds to the position of the hob's cutting edge. The distance sensor 511 monitors the distance between the cutting edges of the hob to determine the degree of wear and whether the cutting edge is skewed. Then, the asynchronous motor 54 is started to drive the rear rotating tube 53 to rotate, and the rear rotating tube 53 drives the hob to rotate rapidly.

[0041] See Figure 1 , Figure 2 and Figure 3 The simulation mechanism 4 includes a clamping block 46 mounted on the U-shaped frame 2 via a moving component 45. The clamping block 46 is provided with a friction plate 47 for rubbing the roller cutter. The moving component 45 includes a moving plate 451 that is slidably mounted on the U-shaped frame 2. The moving plate 451 is slidably connected to the clamping block 46.

[0042] It should be noted that a wedge plate 521 is fixed on the upper side of the front sliding frame 52, and a driven plate 454 is fixedly installed on the lower side of the moving plate 451. The lower side of the driven plate 454 has a chamfer facing the rear. In the initial state, the chamfer of the driven plate 454 abuts against the inclined surface of the wedge plate 521, so that the wedge plate 521 pushes the driven plate 454 upward, thereby causing the moving plate 451 to drive the friction plate 47 on the pressing block 46 to not contact the cutting edge of the hob.

[0043] In this embodiment, the lower part of the abutment block 46 has a V-shaped groove structure, and two friction plates 47 are provided, which are made of rocks with different hardness. The two friction plates 47 are respectively fixedly attached to the two sides of the V-shaped groove of the abutment block 46.

[0044] When the front sliding frame 52 moves backward, the front sliding frame 52 drives the wedge plate 521 to move backward to a position where it no longer supports the driven plate 454. This causes the moving plate 451 to move the two friction plates 47 against the two sides of the hob's cutting edge under the action of gravity. When the hob rotates, the cutting edge of the hob rubs against the two friction plates 47, thus simulating the hob's working conditions. The two friction plates 47 with different hardness can cause different degrees of wear on the hob, increasing the complexity of the simulated working conditions.

[0045] See Figure 1 , Figure 4 and Figure 5 The simulation mechanism 4 also includes a rotating cylinder 41 rotatably disposed on the right side of the support plate 3. A swing rod 42 arranged radially is fixedly installed on the outside of the rotating cylinder 41. An impact ball 43 is rotatably disposed at the end of the swing rod 42 away from the rotating cylinder 41. A drive assembly 44 for driving the rotating cylinder 41 to rotate is disposed on the support plate 3.

[0046] See Figure 4 , Figure 5 and Figure 6 The drive assembly 44 includes a synchronous motor 441 fixedly installed on the left side of the support plate 3. The output shaft of the synchronous motor 441 is arranged coaxially inside the rotating cylinder 41. A push block 442 is fixedly installed on the output shaft of the synchronous motor 441. A movable square rod 443 is slidably arranged on the rotating cylinder 41 along its radial direction.

[0047] See Figure 5 and Figure 6 A track groove plate 444 is fixedly installed on the right side of the support plate 3. A protruding rod 445 is fixedly installed on the side of the movable square rod 443 away from the axis of the rotating cylinder 41. The protruding rod 445 is slidably connected inside the track groove plate 444.

[0048] It should be noted that in this embodiment, the existing track drive assembly drives the support plate 3 to slide on the horizontal section of the base frame 1. In the initial state, the support plate 3 is located on the right side of the base frame 1, so that the support plate 3 drives the impact ball 43 to swing on the left side of the U-shaped frame 2 through the rotating cylinder 41 and the swing rod 42. When the roller cutter is fixedly connected to the two rotating tubes 53, the left part of the roller cutter extends to the left part of the U-shaped frame 2, so that the impact ball 43 can hit the side of the roller cutter, and at this time the impact ball 43 is located at the rear of the roller cutter.

[0049] It should be noted that the middle part of the trajectory groove plate 444 is an arc-shaped structure arranged coaxially with the rotating cylinder 41, and the front and rear sides of the trajectory groove plate 444 are inclined structures that gradually move away from the axis of the rotating cylinder 41.

[0050] When the friction plate 47 is attached to the cutting edge of the hob, the synchronous motor 441 is started to rotate forward. The synchronous motor 441 drives the rotating cylinder 41 to rotate synchronously through the push block 442 and the moving square rod 443. This causes the rotating cylinder 41 to drive the impact ball 43 to rotate backward and upward through the swing rod 42, thereby gradually increasing the gravitational potential energy of the impact ball 43.

[0051] When the push block 442 pushes the moving square rod 443, the moving square rod 443 causes the protruding rod 445 to slide inside the arc-shaped structure of the track groove plate 444. The arc-shaped structure of the track groove plate 444 limits the protruding rod 445, so that the moving square rod 443 is always inserted into the interior of the rotating cylinder 41, thereby enabling the push block 442 to push the moving square rod 443.

[0052] When the moving square rod 443 drives the protruding rod 445 to the inclined structure position at the rear of the track groove plate 444, the protruding rod 445 drives the moving square rod 443 to move away from the axis of the rotating cylinder 41 along the guide of the inclined structure at the rear of the track groove plate 444, so that the pushing block 442 no longer blocks the moving square rod 443. When the pushing block 442 rotates past the moving square rod 443, the impact ball 43 swings forward and downward under the action of gravity, and then the impact ball 43 hits the rotating cutter, simulating the impact of a stone falling on it when the cutter is working.

[0053] See Figure 1A swing plate 21 is fixedly installed on the right side of the U-shaped frame 2. A second hydraulic cylinder 22 is hinged to the upper side of the base frame 1. The telescopic section of the second hydraulic cylinder 22 is hinged to the swing plate 21. A linkage rod 23 is fixedly installed on the right side of the U-shaped frame 2. Two symmetrically arranged limit rods 24 are fixedly installed on the right side of the vertical section of the base frame 1. The linkage rod 23 is located between the two limit rods 24.

[0054] While the synchronous motor 441 is started to rotate, the extension section of the second hydraulic cylinder 22 reciprocates, causing the second hydraulic cylinder 22 to push and pull the rocker plate 21 reciprocally. The rocker plate 21 drives the U-shaped frame 2 to deflect back and forth, which in turn causes the U-shaped frame 2 to drive the hob to deflect back and forth. This allows the impact ball 43 to strike the hob at different angles, further conforming to the complex working conditions of the hob in actual operation.

[0055] See Figure 1 , Figure 2 and Figure 4 A helical spring is provided between the movable plate 451 and the abutment block 46. An arc-shaped plate 452 is fixedly installed on the left side of the movable plate 451, and a roller 453 is rotatably provided on the swing rod 42.

[0056] When the impact ball 43 swings rapidly toward the cutter head, the swing rod 42 drives the roller 453 on it to contact the upper arc surface of the arc plate 452, causing the roller 453 to push the arc plate 452 downward along the upper arc surface of the arc plate 452. The arc plate 452 compresses the helical spring through the moving plate 451, which increases the elastic force of the helical spring on the clamping block 46, thereby rapidly increasing the squeezing force of the friction plate 47 on the cutter head. This achieves an intermittent dynamic enhancement of the pressure applied by the friction plate 47 to the cutter head, accurately simulating the rapid alternating load force borne by the cutter head when tunneling in alternating soft and hard rock strata, making the wear test closer to the actual complex working conditions.

[0057] See Figure 1 , Figure 4 and Figure 5 Several pointed blocks 431 are evenly spaced along the circumference of the swing rod 42 on the impact ball 43, and are arranged radially along the swing rod 42. A push spring is provided between the pointed blocks 431 and the impact ball 43. A dovetail groove plate 31 is slidably connected to the middle of the support plate 3.

[0058] It should be noted that, as Figure 4 As shown, an electric push rod 311 is fixedly installed on the lower part of the dovetail groove plate 31, and the telescopic section of the electric push rod 311 is fixedly connected to the support plate 3.

[0059] When the impact ball 43 strikes the cutter, the pointed block 431 on the impact ball 43 simulates the scratching wear caused by the sharp edges of the stone on the cutter. Then, the telescopic section of the electric push rod 311 is retracted, causing the electric push rod 311 to drive the dovetail groove plate 31 to move to the right. The dovetail groove plate 31 gradually pushes the swing rod 42 through its left dovetail groove, causing the swing rod 42 to rotate towards a more vertical state. This causes the swing rod 42 to drive the impact ball 43 to press against the rear of the cutter, allowing the impact ball 43 to roll along the surface of the cutter after impact. This effectively simulates the continuous scraping wear caused by the falling stone block remaining on the cutter and rotating with the cutter head, greatly enriching the simulation dimensions of wear patterns.

[0060] After a period of time, the telescopic section of the electric push rod 311 is extended to the initial state. Then, the synchronous motor 441, which rotates one revolution of the output shaft, drives the push block 442 to push the moving square rod 443 again, causing the impact ball 43 to swing backward and upward again, thereby increasing the gravitational potential energy of the impact ball 43 to continuously impact the hob.

[0061] After continuously impacting the rear side of the hob for a period of time, the support plate 3 is moved to the left by the track drive assembly, so that the support plate 3 drives the impact ball 43 to move completely to the left side of the hob. Then, the synchronous motor 441 is reversed, so that the synchronous motor 441 drives the impact ball 43 to swing forward to the front of the hob. Then, the support plate 3 is moved to the right to reset, and the synchronous motor 441 is continuously reversed, so that the impact ball 43 intermittently impacts the front of the hob, thereby conducting a comprehensive test on both sides of the hob.

[0062] If, within the specified test time, the cutting edge of the hob exhibits chipping, excessive wear, or skewness, and the distance sensor 511 detects that the distance between it and the cutting edge of the hob exceeds the standard range, the hob is deemed unqualified for the test; otherwise, it is qualified.

[0063] See Figures 1 to 6 The present invention further includes the following steps when testing the hob: First, the operator holds the hob between two sliding frames 52, and inserts the rear part of the hob into the rear rotating tube 53, and retracts the extension section of the first hydraulic cylinder 55, so that the hob is fixedly connected to the two rotating tubes 53.

[0064] In the second step, the moving plate 451 drives the two friction plates 47 to adhere to both sides of the cutting edge of the hob under the action of gravity. Then, the asynchronous motor 54 is started to drive the hob to rotate rapidly. The cutting edge of the hob rubs against the two friction plates 47, thereby simulating the use of the hob during operation.

[0065] The third step is to start the synchronous motor 441 to rotate forward and reciprocate the extension section of the second hydraulic cylinder 22, so that the roller cutter of the second hydraulic cylinder 22 deflects back and forth. The synchronous motor 441 drives the impact ball 43 to rotate backward and upward, and then the impact ball 43 impacts the rotating roller cutter at different angles under the action of gravity, simulating the impact of stones falling on the roller cutter when it is working.

[0066] In the fourth step, the swing rod 42 drives the roller 453 on it to push the moving plate 451 downward, so that the pressing block 46 quickly increases the squeezing force of the friction plate 47 on the cutter blade, realizing the intermittent dynamic enhancement of the pressure applied by the friction plate 47 to the cutter, making the wear test closer to the actual complex working conditions.

[0067] The fifth step is to retract the telescopic section of the electric push rod 311, so that the dovetail groove plate 31 pushes the swing rod 42 to drive the impact ball 43 to press against the rear of the cutter. This allows the impact ball 43 to roll along the surface of the cutter after impact, effectively simulating the continuous scraping and wear caused by the falling stone block remaining on the cutter and rotating with the cutter head.

[0068] The sixth step involves extending the telescopic section of the electric push rod 311 to its initial state. Then, the synchronous motor 441, which rotates one revolution of the output shaft, drives the push block 442 to push the moving square rod 443 again, causing the impact ball 43 to swing backward and upward again, thereby increasing the gravitational potential energy of the impact ball 43 to continuously impact the hob.

[0069] The seventh step involves moving the support plate 3 to the left via the track drive assembly, then reversing the synchronous motor 441 to make the impact ball 43 swing forward to the front of the hob. Next, the support plate 3 is moved to the right to reset, and the synchronous motor 441 is continuously reversed, so that the impact ball 43 intermittently impacts the front of the hob, thereby conducting a comprehensive test on both sides of the hob.

[0070] Step 8: Within the specified test time, if the cutting edge of the hob shows signs of chipping, excessive wear, or skewness, the distance sensor 511 will detect that the distance between itself and the cutting edge of the hob exceeds the standard range. If this condition is not met, the hob is considered unqualified. Otherwise, it is considered qualified.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered within the protection scope of the present invention.

Claims

1. A shield tunneling machine component performance testing device, comprising an L-shaped base frame, characterized in that, The horizontal section of the base frame is slidably connected to a support plate, and the vertical section of the base frame is rotatably connected to a U-shaped frame. The U-shaped frame and the support plate are jointly provided with a simulation mechanism for impact and wear testing of the hob, and the U-shaped frame is provided with a limiting mechanism for limiting the hob. The simulation mechanism includes a rotating cylinder rotatably mounted on the right side of the support plate, a swing rod fixedly mounted on the outside of the rotating cylinder and arranged radially thereon, an impact ball rotatably mounted at the end of the swing rod away from the rotating cylinder, and a drive assembly for driving the rotating cylinder to rotate on the support plate. During the test, the rotating cylinder was intermittently driven by the drive component, which caused the rotating cylinder to drive the impact ball upward through the swing rod, thereby increasing the potential energy of the impact ball. Then, the impact ball swung and impacted the roller cutter under the action of gravity, simulating the impact of a stone falling on the roller cutter. The simulation mechanism also includes a clamping block mounted on a U-shaped frame via a movable component, and the clamping block is provided with a friction plate for rubbing the roller cutter; The limiting mechanism includes a bearing plate fixedly installed between two horizontal sections of the U-shaped frame. Two sliding frames arranged in a front-to-back manner are provided on the left side of the bearing plate. The rear sliding frame is fixedly connected to the bearing plate, and the front sliding frame is slidably connected to the bearing plate in a front-to-back manner. The drive assembly includes a synchronous motor fixedly installed on the left side of the support plate. The output shaft of the synchronous motor is located inside the rotating cylinder and is arranged coaxially with the rotating cylinder. A push block is fixedly installed on the output shaft of the synchronous motor, and a movable square rod is slidably arranged on the rotating cylinder along its radial direction. The moving component includes a moving plate that is slidably mounted on a U-shaped frame, the moving plate and the abutment block being slidably connected, a helical spring being provided between the moving plate and the abutment block, an arc-shaped plate being fixedly mounted on the left side of the moving plate, and a roller being rotatably mounted on the swing rod.

2. The shield tunneling machine component performance testing equipment according to claim 1, characterized in that, The sliding frame has a rotating tube on its left side, and an asynchronous motor is fixedly installed on the horizontal section at the rear of the U-shaped frame. The output shaft of the asynchronous motor is fixedly connected to the rotating tube at the rear.

3. The shield tunneling machine component performance testing equipment according to claim 1, characterized in that, A distance sensor is fixedly installed on the support plate, and a hydraulic cylinder is fixedly installed on the right side of the support plate. The telescopic section of the hydraulic cylinder is fixedly connected to the sliding frame at the front.

4. The shield tunneling machine component performance testing equipment according to claim 1, characterized in that, A swing plate is fixedly installed on the right side of the U-shaped frame, and a second hydraulic cylinder is hinged to the upper side of the base frame. The extension section of the second hydraulic cylinder is hinged to the swing plate.

5. The shield tunneling machine component performance testing equipment according to claim 1, characterized in that, A linkage rod is fixedly installed on the right side of the U-shaped frame, and two symmetrically arranged limiting rods are fixedly installed on the right side of the vertical section of the base frame, with the linkage rod located between the two limiting rods.

6. The shield tunneling machine component performance testing equipment according to claim 5, characterized in that, A track groove plate is fixedly installed on the right side of the support plate, and a protruding rod is fixedly installed on the side of the movable square rod away from the axis of the rotating cylinder. The protruding rod is slidably connected inside the track groove plate.

7. The shield tunneling machine component performance testing equipment according to claim 1, characterized in that, The impact ball is provided with several pointed blocks at equal intervals along the circumference of the swing rod, and a push spring is provided between the pointed blocks and the impact ball. A dovetail groove plate is slidably connected to the middle of the support plate.

Images