A device for testing the friction reaction force of tunnel boring machine cutterheads.

Abstract

This utility model discloses a friction reaction device for testing the cutterhead of a tunnel boring machine, comprising: a support frame; a mounting plate fixedly installed on the front side of the support frame; positioning strips spaced apart on the left and right sides of the mounting plate; a bearing block fixedly installed on the mounting plate; a limiting block fixedly installed on the positioning strips, with the limiting block protruding from the corresponding positioning strip to form a limiting gap; and a friction reaction component, with its bottom contacting the bearing block and its left and right sides embedded in the corresponding limiting gaps. This utility model supports the friction reaction component with the bearing block, and, in conjunction with the positioning strips on both sides and the limiting gaps, can limit the movement of the friction reaction component, thereby achieving rapid positioning of the friction reaction component on the mounting plate. This effectively reduces the adjustment steps during the installation of the friction reaction component, avoids the hassle of repeatedly aligning holes manually, significantly reduces installation difficulty, improves replacement efficiency, and simplifies the disassembly and assembly of the friction reaction component.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine cutterhead testing technology, and in particular, to a friction reaction device for testing tunnel boring machine cutterheads. Background Technology

[0002] During tunnel boring machine (TBM) construction, the cutterhead, as a key component that directly contacts and cuts the rock strata, directly impacts construction efficiency, cost, and safety. During operation, the cutterhead must withstand enormous axial, radial, and torque forces, while simultaneously experiencing intense friction with the rock strata. This makes the cutterhead highly susceptible to wear, cracking, and other failures. To ensure stable and reliable operation of the cutterhead in actual engineering projects, comprehensive performance testing is necessary during its research and development and production stages. By simulating the rolling contact between the cutterhead and the rock strata, and by conducting experiments to obtain data on wear, stress, and damage, crucial information can be obtained for cutterhead structural optimization, material selection, and service life assessment.

[0003] During testing, a structure with properties similar to those of the soil and rock is typically set up to contact the cutting cutter, providing a reaction force to simulate its actual working state. As a wear component, the friction reaction force assembly often needs replacement, and to simulate more working conditions, it may be necessary to replace it with friction reaction force assemblies of different performance characteristics.

[0004] However, friction reaction components are quite heavy and require fasteners for fixation. In particular, after placing the friction reaction components in the designated position and aligning the holes, the fasteners need to be installed manually and repeatedly, making the replacement and installation of friction reaction components quite troublesome. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a friction reaction device for testing the cutterhead of a tunnel boring machine.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A friction reaction device for testing the cutterhead of a tunnel boring machine includes: a support frame; a mounting plate fixedly installed on the front side of the support frame; two positioning strips spaced apart on the left and right sides of the mounting plate; a bearing block fixedly installed on the bottom of the mounting plate and protruding from the front side of the mounting plate; a limiting block fixedly installed on the positioning strips, with the limiting block protruding towards the center of the mounting plate from the corresponding positioning strip, so that a limiting gap is formed between the limiting block and the mounting plate; and a friction reaction component, with its bottom contacting the bearing block and its left and right sides embedded in the corresponding limiting gaps. The friction reaction component is connected and fixed to the mounting plate by detachable fasteners.

[0008] Furthermore, the friction reaction force assembly includes a back plate and a frame. The rear side of the back plate is attached to the mounting plate and has corresponding holes for connection and fixation by detachable fasteners. The frame is connected to the front side of the back plate, and the frame and the back plate define a receiving cavity for accommodating the reaction force block.

[0009] Furthermore, a limit plate is installed at the front corner of the frame to limit the corner of the reaction block.

[0010] Furthermore, the reaction block is a concrete block formed after concrete is poured into the receiving cavity and solidifies.

[0011] Furthermore, the front side of the back panel is provided with a positioning groove, and the rear end of the frame is embedded in the positioning groove.

[0012] Furthermore, the left and right sides of the back plate protrude from the frame and are embedded in the limiting gap between the limiting block and the mounting plate.

[0013] Furthermore, the abutment frame and the mounting plate are provided with corresponding holes for connection and fixation by fasteners; a positioning block is connected to the rear side of the mounting plate, and a positioning port for the positioning block to be inserted is provided on the front side of the abutment frame.

[0014] Furthermore, the mounting plate is provided with guide blocks on the left and right sides of its upper end, and the front side of the upper end of the guide blocks is provided with a first chamfer.

[0015] Furthermore, the upper ends of the positioning strips on both the left and right sides are provided with a second chamfer on the opposite sides.

[0016] Furthermore, the inner side of the portion of the limiting block protruding from the positioning strip is provided with a third chamfer.

[0017] This utility model has the following beneficial effects:

[0018] The bearing block provides bottom support for the friction reaction component. Combined with the positioning strips on both sides and the limiting gap formed by the limiting blocks and the mounting plate, the left and right sides of the friction reaction component can be limited in both lateral and longitudinal directions, enabling rapid positioning of the friction reaction component on the mounting plate. This effectively reduces the adjustment steps during installation, avoiding the hassle of repeatedly aligning holes manually. Especially for heavier friction reaction components, it significantly reduces installation difficulty, improves replacement efficiency, simplifies disassembly and assembly, and facilitates flexible replacement of friction reaction components with different performance characteristics according to different test conditions, enhancing the versatility and practicality of the device. The synergistic effect of the positioning strips, limiting gaps, and bearing block provides stable constraints during the operation of the friction reaction component, preventing displacement or shaking. Combined with the detachable fasteners between the friction reaction component and the mounting plate, this ensures stable installation of the friction reaction component and effectively avoids stress concentration on the detachable fasteners.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 yes Figure 1 A schematic diagram of a decomposed state;

[0023] Figure 3 yes Figure 1 A schematic diagram of another decomposition state;

[0024] Figure 4 yes Figure 3 Another structural diagram from a different perspective;

[0025] Figure 5 This is a structural diagram of the mounting plate;

[0026] Figure 6 yes Figure 5 A schematic diagram of the decomposed state structure;

[0027] Figure 7 This is a schematic diagram of the friction reaction force assembly;

[0028] Figure 8 yes Figure 7 A schematic diagram of the decomposed state structure.

[0029] Legend:

[0030] Support frame 100, positioning port 110;

[0031] Mounting plate 200, positioning block 210, guide block 220, first chamfer 221;

[0032] Positioning strip 300, second chamfer 310;

[0033] 400 bearing block;

[0034] Limiting block 500, limiting gap 510, third chamfer 520;

[0035] Friction reaction force component 600, back plate 610, positioning groove 611, frame 620, receiving cavity 630, limiting plate 640. Detailed Implementation

[0036] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0040] Please refer to Figure 1 and Figure 2 A preferred embodiment of the present invention provides a friction reaction device for testing the cutterhead of a tunnel boring machine, comprising a support frame 100, a mounting plate 200, a positioning strip 300, a bearing block 400, a limiting block 500, and a friction reaction component 600.

[0041] Mounting plate 200 is fixedly installed on the front side of support frame 100.

[0042] Two positioning strips 300 are provided and installed at intervals on the left and right sides of the mounting plate 200, and protrude from the front side of the mounting plate 200.

[0043] The support block 400 is fixedly installed on the bottom of the mounting plate 200 and protrudes from the front side of the mounting plate 200.

[0044] The limiting block 500 is fixedly installed on the positioning strip 300, and the limiting block 500 protrudes from the center of the mounting plate 200, corresponding to the positioning strip 300, so that a limiting gap 510 is formed between the limiting block 500 and the mounting plate 200. Limiting blocks 500 are installed on both the left and right positioning strips 300. The right side of the limiting block 500 on the left positioning strip 300 protrudes from the corresponding positioning strip 300; the left side of the limiting block 500 on the right positioning strip 300 protrudes from the corresponding positioning strip 300, that is, the limiting block 500 protrudes from the opposite sides of the two positioning strips 300.

[0045] The bottom of the friction reaction component 600 contacts the bearing block 400, and part of the friction reaction component 600 is embedded between the positioning strips 300 on the left and right sides. The left and right sides of the friction reaction component 600 are embedded with corresponding limiting gaps 510. The friction reaction component 600 and the mounting plate 200 are connected and fixed by detachable fasteners, specifically screws. The friction reaction component 600 and the mounting plate 200 are provided with corresponding holes for connection and fixation by screws, so that when disassembly is required, the friction reaction component 600 can be disassembled by unscrewing the screws.

[0046] This utility model provides a friction reaction device for testing the cutterhead of a tunnel boring machine. A bearing block 400 provides bottom support for the friction reaction component 600. Combined with the positioning strips 300 on both sides and the limiting gap 510 formed by the limiting block 500 and the mounting plate 200, the device can limit the left and right sides of the friction reaction component 600 in both left-right and front-back directions, thereby achieving rapid positioning of the friction reaction component 600 on the mounting plate 200. This effectively reduces the adjustment steps during installation of the friction reaction component 600, avoiding the hassle of repeatedly aligning holes manually. Especially for the heavier friction reaction component 600, it significantly reduces installation difficulty, improves replacement efficiency, simplifies the disassembly and assembly operations, and facilitates flexible replacement of friction reaction components 600 with different performance characteristics according to different testing conditions, thus enhancing the versatility and practicality of the device. The synergistic effect of the positioning strip 300, the limiting gap 510, and the bearing block 400 provides stable constraint during the operation of the friction reaction force assembly 600, preventing it from shifting or shaking. Together with the detachable fasteners between the friction reaction force assembly 600 and the mounting plate 200, it ensures the stable installation of the friction reaction force assembly 600 and effectively avoids stress concentration on the detachable fasteners.

[0047] Reference Figure 7 and Figure 8In some embodiments of this utility model, the friction reaction force assembly 600 includes a back plate 610 and a frame 620. The back plate 610 is embedded between the positioning strips 300 on the left and right sides. The rear side of the back plate 610 is attached to the mounting plate 200 and has corresponding holes for connection and fixation by detachable fasteners. The frame 620 is connected to the front side of the back plate 610, and the frame 620 and the back plate 610 define a receiving cavity 630 for accommodating the reaction force block. The rear side of the back plate 610 is attached to the mounting plate 200 and is connected and fixed by detachable fasteners, making the connection between the friction reaction force assembly 600 and the mounting plate 200 stable and reliable. Specifically, the mounting plate 200 is provided with threaded holes, and the back plate 610 is provided with through holes adapted to the threaded holes. The through holes are aligned with the threaded holes and screws are installed, thereby fixing the back plate 610 to the mounting plate 200. The cavity 630 formed by the frame 620 and the back plate 610 provides a stable installation space for the reaction block, effectively fixing the reaction block and ensuring that the reaction block will not easily shift during the test.

[0048] Reference Figure 7 and Figure 8 In some embodiments of this utility model, a limiting plate 640 is installed at the front corner of the frame 620 to limit the corner of the reaction block. The limiting plate 640 installed at the front corner of the frame 620 effectively limits the corner of the reaction block. This further enhances the stability of the reaction block within the receiving cavity 630, preventing the corner of the reaction block from tilting forward during testing, and preventing it from moving forward and detaching from the receiving cavity 630 when installed as a whole with the back plate 610 and the frame 620.

[0049] In some embodiments of this invention, the reaction block is a concrete block formed by pouring concrete into the receiving cavity 630 and allowing it to solidify. During the experiment, the roller cutter contacts and rotates with the reaction block, applying pressure to it. The reaction block then applies a counterforce to the roller cutter, thus simulating the roller cutter's actual working condition. The properties of the concrete material can be flexibly controlled by adjusting the material ratio and arranging reinforcing bars, simulating the properties of different soils and rocks to meet diverse testing requirements. Furthermore, the concrete block is low-cost to produce, readily available, and has a simple casting process, reducing testing costs. The friction reaction component 600 can be installed on the mounting plate 200 after the concrete in the receiving cavity 630 has solidified. The back plate 610 and frame 620 are reusable.

[0050] Reference Figure 7 and Figure 8In some embodiments of this utility model, a positioning groove 611 is provided on the front side of the back plate 610, and the rear end of the frame 620 is embedded in the positioning groove 611. By providing a positioning groove 611 on the front side of the back plate 610 and embedding the rear end of the frame 620 into the positioning groove 611, precise positioning and connection between the frame 620 and the back plate 610 can be achieved. This not only improves the stability of the connection between the frame 620 and the back plate 610, but also facilitates the connection and installation of the frame 620 and the back plate 610. Typically, the frame 620 and the back plate 610 are fixed by fasteners through corresponding holes. Embedding the rear end of the frame 620 into the positioning groove 611 enables automatic alignment of the holes, facilitating subsequent fastener installation and improving the assembly efficiency of the device.

[0051] Reference Figure 5 and Figure 7 In some embodiments of this utility model, the left and right sides of the back plate 610 protrude from the frame 620 and are embedded in the limiting gap 510 between the limiting block 500 and the mounting plate 200. By having the left and right sides of the back plate 610 protrude from the frame 620 and be embedded in the limiting gap 510 between the limiting block 500 and the mounting plate 200, the back plate 610, as the main component connecting the friction reaction force assembly 600 and the mounting plate 200, can more accurately position the friction reaction force assembly 600 on the mounting plate 200 after its left and right sides are embedded in the limiting gap 510, reducing adjustment time during installation. Furthermore, the protrusion of the back plate 610 from the frame 620 also facilitates the arrangement of holes on the sides, thereby fixing it to the mounting plate 200 with screws. Specifically, the upper and lower sides of the back plate 610 also protrude from the frame 620 to facilitate the circumferential arrangement of holes, achieving multi-position connection and fixation with the mounting plate 200, and improving connection stability. The holes on the side of the back plate 610 can also prevent concrete inside the frame 620 from entering these holes and affecting the subsequent installation of fasteners.

[0052] Reference Figure 3 and Figure 4 In some embodiments of this utility model, the abutment frame 100 and the mounting plate 200 are provided with corresponding holes for connection and fixation by fasteners; a positioning block 210 is connected to the rear side of the mounting plate 200, and a positioning opening 110 for the positioning block 210 to be inserted is provided on the front side of the abutment frame 100. By providing corresponding holes on the abutment frame 100 and the mounting plate 200 and connecting and fixing them with fasteners, the stability of the connection between the two is ensured. At the same time, the positioning block 210 on the rear side of the mounting plate 200 is inserted into the positioning opening 110 on the front side of the abutment frame 100, realizing the precise positioning of the mounting plate 200 and the abutment frame 100, which facilitates the quick alignment of the holes during installation and improves the assembly efficiency of the device.

[0053] Reference Figure 5 and Figure 6In some embodiments of this utility model, guide blocks 220 are provided on the left and right sides of the upper end of the mounting plate 200, and a first chamfer 221 is provided on the front side of the upper end of the guide block 220. This provides good guidance when installing the friction reaction assembly 600. When the friction reaction assembly 600 is installed onto the mounting plate 200 from above, the first chamfer 221 guides the friction reaction assembly 600 (back plate 610) smoothly into the installation position, reducing the difficulty of alignment during installation.

[0054] Reference Figure 5 and Figure 6 In some embodiments of this utility model, the upper ends of the positioning strips 300 on both sides are provided with a second chamfer 310. This chamfer plays an auxiliary guiding role during the installation of the friction reaction force assembly 600, reducing the risk of collision between the friction reaction force assembly 600 (back plate 610) and the positioning strips 300 during installation.

[0055] Reference Figure 5 and Figure 6 In some embodiments of this utility model, the inner side of the portion of the limiting block 500 protruding from the positioning strip 300 is provided with a third chamfer 520. This chamfer serves as a guide during the installation of the friction reaction force assembly 600. When the left and right sides of the friction reaction force assembly 600 (back plate 610) are inserted into the limiting gap 510, the third chamfer 520 guides the sides of the friction reaction force assembly 600 to smoothly enter the limiting gap 510, avoiding a hard collision between the sides of the friction reaction force assembly 600 and the limiting block 500, while also reducing the difficulty of alignment and further improving the installation efficiency of the device.

[0056] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A friction counter force device for testing a TBM cutter, characterized in that, include: Abutment frame (100); Mounting plate (200) is fixedly installed on the front side of the abutment frame (100); Positioning strips (300) are provided in two and are installed at intervals on the left and right sides of the mounting plate (200); A support block (400) is fixedly installed on the bottom of the mounting plate (200) and protrudes from the front side of the mounting plate (200); a limiting block (500) is fixedly installed on the positioning strip (300), and the limiting block (500) protrudes from the center of the mounting plate (200) to form a limiting gap (510) between the limiting block (500) and the mounting plate (200); The friction reaction force assembly (600) is in contact with the bearing block (400) at its bottom, and the left and right sides are embedded with corresponding limiting gaps (510). The friction reaction force assembly (600) and the mounting plate (200) are connected and fixed by detachable fasteners.

2. The friction counter-force device for testing a TBM cutter according to claim 1, wherein, The friction reaction force assembly (600) includes a back plate (610) and a frame (620). The back plate (610) is attached to the mounting plate (200) on the rear side and has corresponding holes for connection and fixation by detachable fasteners. The frame (620) is connected to the front side of the back plate (610). The frame (620) and the back plate (610) define a receiving cavity (630) for accommodating the reaction force block.

3. The friction counter-force device for testing a TBM cutter according to claim 2, wherein, Limiting plates (640) are installed on the front corners of the frame (620) to limit the corners of the reaction block.

4. The friction counter-force device for testing a TBM cutter according to claim 2, wherein, The reaction block is a concrete block formed after concrete is poured into the receiving cavity (630) and solidified.

5. The friction counter-force device for testing a TBM cutter according to claim 2, wherein, The back panel (610) has a positioning groove (611) on its front side, and the rear end of the frame (620) is embedded in the positioning groove (611).

6. The friction counter-force device for testing a TBM cutter according to claim 5, wherein, The back plate (610) protrudes from the frame (620) on the left and right sides and is embedded in the limiting gap (510) between the limiting block (500) and the mounting plate (200).

7. The device for testing the friction counterforce of a tunneling machine cutter according to claim 1, characterized in that, The abutment frame (100) and the mounting plate (200) are provided with corresponding holes for connection and fixation by fasteners; a positioning block (210) is connected to the rear side of the mounting plate (200), and a positioning port (110) for the positioning block (210) to be inserted is provided on the front side of the abutment frame (100).

8. The device for testing the friction counterforce of a tunneling machine cutter according to claim 1, characterized in that, The mounting plate (200) has guide blocks (220) on the left and right sides of its upper end, and the front side of the upper end of the guide block (220) has a first chamfer (221).

9. The device for testing the friction counterforce of a tunneling machine cutter according to claim 1, characterized in that, The positioning strips (300) on the left and right sides have a second chamfer (310) on the opposite sides at the top.

10. The device for testing the friction counterforce of a tunneling machine cutter according to claim 1, characterized in that, The inner side of the portion of the limiting block (500) that protrudes from the positioning strip (300) is provided with a third chamfer (520).

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