Shell cutter system capable of online wear monitoring and compensation and shield tunneling machine

Abstract

This utility model relates to the field of tunneling equipment technology, specifically providing a shell cutter system and tunnel boring machine (TBM) with online wear monitoring and compensation. The system includes a shell cutter guide rail, a shell cutter assembly, a sealing box, a wear monitoring device, a locking mechanism, and a drive mechanism. The shell cutter guide rail is fixedly connected to the spokes of the cutterhead. The sealing box is located inside the spokes of the cutterhead and fixedly connected to the shell cutter guide rail. The shell cutter assembly is embedded in the shell cutter guide rail and can move along it. The wear monitoring device is located on the shell cutter assembly. The drive mechanism is located inside the sealing box and connected to the shell cutter assembly. The locking mechanism is located between the shell cutter assembly and the shell cutter guide rail, and the locking mechanism cooperates with the drive mechanism to achieve wear compensation for the shell cutter assembly. The shell cutter system provided by this utility model can monitor the wear of the shell cutter assembly in real time and automatically compensate for its wear, ensuring cutting accuracy, extending service life, and reducing construction costs.

Description

Technical Field

[0001] This utility model relates to the field of tunneling equipment technology, specifically to a shell cutter system and a tunnel boring machine capable of online wear monitoring and compensation. Background Technology

[0002] The cutterhead is the direct working component of a tunnel boring machine (TBM) for excavating and cutting the tunnel face. It is one of the key components of the TBM, consisting of a steel structure, cutting tools, and other auxiliary systems. It has functions such as excavating strata, maintaining the stability of the excavation face, and mixing excavated soil. The quality of the cutterhead largely determines the construction cost and tunneling efficiency.

[0003] The shell cutter head is one of the key cutting tools on the tunnel boring machine (TBM) cutterhead. Its main function is to cut the soil, loosening the soil around the cutter and scraper to create efficient cutting conditions for the main cutter, effectively extending their service life. However, during tunneling operations, the continuous abrasive action of the excavated soil causes wear on the cutter head. When the cutter wears to its limit, it can easily trigger a chain reaction of failures, including cutterhead body wear and drive system overload. Traditional shell cutter head systems cannot monitor wear online or compensate for wear. When the cutter wears to its limit, the machine must be shut down and the entire cutter head replaced, leading to extended construction time and increased costs.

[0004] Based on the above, this utility model provides a shell cutter system and a tunnel boring machine with online wear monitoring and compensation to solve the technical problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a shell cutter system and a tunnel boring machine capable of online wear monitoring and compensation. The specific technical solution is as follows:

[0006] A shell cutter system with online wear monitoring and compensation includes a shell cutter guide rail, a shell cutter assembly, a sealing box, a wear monitoring device, a locking mechanism, and a drive mechanism;

[0007] The shell cutter guide rail is fixedly connected to the spokes of the cutter disc;

[0008] The sealing box is located inside the circular spokes of the cutter head and is fixedly connected to the shell cutter guide rail;

[0009] The shell cutter assembly is embedded in the shell cutter guide rail and can move along the shell cutter guide rail;

[0010] The wear monitoring device is mounted on the shell cutter assembly;

[0011] The drive mechanism is located inside the sealed box and connected to the shell knife assembly, and is used to drive the shell knife assembly to move along the shell knife guide rail;

[0012] The locking mechanism is located between the shell cutter assembly and the shell cutter guide rail. The locking mechanism works in conjunction with the drive mechanism to achieve wear compensation for the shell cutter assembly.

[0013] Furthermore, the shell cutter guide rail is provided with a guide groove one, and a guide groove two is provided through the bottom surface of the guide groove one. The guide groove one and the guide groove two form a receiving cavity for inserting the shell cutter assembly.

[0014] Furthermore, multiple sealing grooves are provided on the inner wall of the second guide groove along the axial direction of the second guide groove, and sealing rings are provided in the sealing grooves.

[0015] Furthermore, the shell cutter assembly includes a shell cutter head and a shell cutter body, with the shell cutter head and the shell cutter body fixedly connected; a cavity is provided at the connection between the shell cutter head and the shell cutter body, and the wear monitoring device is disposed in the cavity; the wear monitoring device is an acoustic emission sensor.

[0016] Furthermore, the shell cutter body is disposed within the receiving cavity formed by guide groove one and guide groove two; a limiting block is bolted to the bottom of the shell cutter body, and the radial dimension of the limiting block is larger than the radial dimension of guide groove two.

[0017] Furthermore, a gap is reserved between the limiting block and the shell cutter guide rail, and the gap is greater than the wear compensation amount of the shell cutter assembly.

[0018] Furthermore, the locking mechanism includes an elastic element and a pin, wherein the elastic element is connected to the pin;

[0019] At least one set of pin holes are staggered on the two opposite side walls of the shell cutter body, and the end of the elastic element away from the pin shaft is fixed in the pin hole;

[0020] At least one set of locking grooves is provided on two opposite sides of the guide groove, and the pin cooperates with the locking groove to lock the shell cutter body and the shell cutter guide rail.

[0021] Furthermore, the locking groove has a trapezoidal cross-sectional shape, and the inner top surface of the locking groove is an inclined surface.

[0022] Furthermore, the drive mechanism includes a top frame, a cam, a bearing housing, and a drive motor. The bearing housing and the drive motor are fixedly installed on the bottom side inside the sealing box. The drive shaft of the drive motor is connected to the bearing housing through a bearing, and the end of the drive shaft is connected to the cam. One end of the top frame is connected to the shell cutter assembly, and the other end is in contact with the outer contour of the cam. The outer contour of the cam is an eccentric circle, and the maximum distance that the cam rotates to move the top frame is equal to the wear compensation amount of the shell cutter assembly.

[0023] A tunnel boring machine includes a cutterhead equipped with a shell cutter system as described above, capable of online wear monitoring and compensation.

[0024] The application of the technical solution of this utility model has the following beneficial effects:

[0025] This invention provides a shell cutting tool system with online wear monitoring and compensation, including a shell cutting tool guide rail, a shell cutting tool assembly, a sealing box, a wear monitoring device, a locking mechanism, and a drive mechanism. The shell cutting tool guide rail is fixedly connected to the spokes of the cutter disc. The sealing box is disposed inside the spokes of the cutter disc and is fixedly connected to the shell cutting tool guide rail. The shell cutting tool assembly is embedded in the shell cutting tool guide rail and can move along the guide rail. The wear monitoring device is disposed on the shell cutting tool assembly. The drive mechanism is disposed in the sealing box and connected to the shell cutting tool assembly, used to drive the shell cutting tool assembly to move along the guide rail. The locking mechanism is disposed between the shell cutting tool assembly and the guide rail, and the locking mechanism cooperates with the drive mechanism to achieve wear compensation of the shell cutting tool assembly. The shell cutting tool system provided by this invention monitors the wear of the shell cutting tool assembly in real time through the wear monitoring device. When the wear reaches a preset threshold, the drive mechanism drives the shell cutting tool assembly to move, and the locking mechanism moves with the shell cutting tool assembly and releases the locking state, adjusting the position of the shell cutting tool assembly to compensate for its wear, ensuring cutting accuracy, extending service life, and reducing construction costs.

[0026] In this invention, during normal operation, the locking mechanism is used to lock the shell cutter assembly and the shell cutter guide rail; when the wear of the shell cutter assembly reaches a preset threshold, the locking mechanism and the drive mechanism cooperate to automatically compensate for the wear of the shell cutter assembly.

[0027] (3) In this utility model, the wear monitoring device adopts an acoustic emission sensor, which can monitor the wear of the shell knife assembly in real time. It has high sensitivity and improves the reliability and accuracy of detection.

[0028] (4) In this utility model, multiple sealing grooves are provided on the inner wall of the second guide groove along the axial direction of the second guide groove, and a sealing ring is provided in the sealing groove to achieve sealing between the shell cutter assembly and the second guide groove, and to prevent mud and other substances from entering the cutter disc.

[0029] (5) This utility model provides a tunnel boring machine, including a cutterhead, on which a shell cutter system capable of online wear monitoring and compensation is provided. By using the shell cutter system, online wear monitoring can be achieved, and the amount of wear can be automatically compensated, thereby extending the service life of the shell cutter and reducing construction costs.

[0030] 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

[0031] 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:

[0032] Figure 1 This is a schematic diagram of the shell-cutting system in this utility model;

[0033] Figure 2 yes Figure 1 A sectional view;

[0034] Figure 3 This is a schematic diagram of the shell cutter guide rail;

[0035] Figure 4 This is a structural diagram of the shell cutter assembly;

[0036] Among them, 1. Clamshell cutter guide rail, 1.1. Guide groove one, 1.2. Guide groove two, 1.3. Locking groove, 1.4. Signal wire hole one, 1.5. Sealing groove, 2. Clamshell cutter assembly, 2.1. Clamshell cutter head, 2.2. Clamshell cutter body, 2.3. Cavity, 2.4. Pin hole, 2.5. Signal wire hole two, 3. Sealing box, 3.1. Wire hole, 4. Wear monitoring device, 4.1. Acoustic emission sensor signal line, 5. Locking mechanism, 5.1. Elastic element, 5.2. Pin shaft, 6. Drive mechanism, 6.1. Top frame, 6.2. Cam, 6.3. Bearing seat, 6.4. Drive motor, 6.5. Motor wire, 7. Clamshell disc spokes, 8. Bolt, 9. Limit block. Detailed Implementation

[0037] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] Example

[0041] See Figure 1 and Figure 2 This embodiment provides a shell cutter system with online wear monitoring and compensation, including a shell cutter guide rail 1, a shell cutter assembly 2, a sealing box 3, a wear monitoring device 4, a locking mechanism 5, and a drive mechanism 6. The shell cutter guide rail 1 is fixedly connected to the circular spokes 7 of the cutter disc. The sealing box 3 is disposed inside the circular spokes 7 of the cutter disc and is fixedly connected to the shell cutter guide rail 1. The shell cutter assembly 2 is embedded in the shell cutter guide rail 1 and can move along the shell cutter guide rail 1. The wear monitoring device 4 is disposed on the shell cutter assembly 2 and is used to monitor the wear of the shell cutter assembly 2 in real time. The drive mechanism 6 is disposed in the sealing box 3 and connected to the shell cutter assembly 2 and is used to drive the shell cutter assembly 2 to move along the shell cutter guide rail 1. The locking mechanism 5 is disposed between the shell cutter assembly 2 and the shell cutter guide rail 1. On the one hand, the locking mechanism 5 is used to lock the shell cutter assembly 2 and the shell cutter guide rail 1. On the other hand, the locking mechanism 5 cooperates with the drive mechanism 6 to realize wear compensation of the shell cutter assembly 2.

[0042] The shell cutter system provided by this utility model monitors the wear of the shell cutter assembly 2 in real time through the wear monitoring device 4. When the wear reaches a preset threshold, the drive mechanism 6 drives the shell cutter assembly 2 to move (at this time, the locking mechanism 5 moves with the shell cutter assembly 2, and the shell cutter assembly 2 and the shell cutter guide rail 1 are in an unlocked state). The position of the shell cutter assembly 2 is adjusted to compensate for its wear, ensuring cutting accuracy and extending service life.

[0043] In this embodiment, the shell cutter guide rail 1 is fixedly connected to the circular spokes 7 of the cutter disc; see also Figure 1 and Figure 2 The shell cutter guide rail 1 is a long strip-shaped block structure, which is embedded on the circular spokes 7 of the cutter disc, and the shell cutter guide rail 1 is welded to the circular spokes 7 of the cutter disc; preferably, the top surface of the shell cutter guide rail 1 is an arc surface, which matches the outer surface of the circular spokes 7 of the cutter disc, and the bottom and side surfaces of the shell cutter guide rail 1 are both flat.

[0044] See Figure 3The shell cutter guide rail 1 is provided with a guide groove 1.1, and a guide groove 1.2 is provided through the bottom surface of the guide groove 1.1. The guide groove 1.1 and the guide groove 1.2 form a receiving cavity for inserting the shell cutter assembly 2. In this embodiment, the guide groove 1.1 is a rectangular groove opened along the length direction of the shell cutter guide rail 1 and located in the middle of the arc surface, and its length matches the width of the shell cutter assembly 2. The guide groove 1.2 is a plurality of circular through holes opened along the length direction of the guide groove 1.1, and the central axis of the circular through holes is perpendicular to the bottom surface of the shell cutter guide rail 1.

[0045] Preferably, multiple sealing grooves 1.5 are provided on the inner wall of the second guide groove 1.2 along the axial direction of the second guide groove 1.2. A sealing ring is provided in the sealing groove 1.5 to achieve sealing between the shell cutter assembly 2 and the second guide groove 1.2, and to prevent mud and other substances from entering the cutter disc.

[0046] In this embodiment, a signal line hole 1.4 is also provided through the bottom surface of the guide groove 1.1.

[0047] See Figure 2 and Figure 4 The shell cutter assembly 2 includes a shell cutter head 2.1 and a shell cutter body 2.2, which are fixedly connected by welding. A cavity 2.3 is provided at the connection between the shell cutter head 2.1 and the shell cutter body 2.2, and the wear monitoring device 4 is disposed in the cavity 2.3 and closely attached to the bottom surface of the shell cutter head 2.1. In this embodiment, the wear monitoring device 4 adopts an acoustic emission sensor, which is connected to the main control system to monitor the wear of the shell cutter head 2.1 in real time.

[0048] In this embodiment, a signal line hole 2.5 is provided through the bottom of the cavity 2.3. The signal line hole 2.5 is concentrically arranged with the signal line hole 1.4 so that the acoustic emission sensor signal line 4.1 of the acoustic emission sensor can pass through.

[0049] In this embodiment, the shell cutter body 2.2 is disposed within the receiving cavity formed by guide groove 1.1 and guide groove 1.2. The bottom of the shell cutter body 2.2 has a toothed structure, which is inserted into guide groove 1.2 and connected to a limiting block 9 by bolt 8. The limiting block 9 protrudes from the bottom surface of the shell cutter guide rail 1, and the radial dimension of the limiting block 9 is larger than the radial dimension of guide groove 1.2, which is used to limit the movement of the shell cutter assembly 2 and prevent the shell cutter assembly 2 from coming out of the shell cutter guide rail 1. A gap is reserved between the limiting block 9 and the shell cutter guide rail 1, and the gap is larger than the wear compensation amount of the shell cutter assembly 2.

[0050] See Figure 1 and Figure 2The sealing box 3 is located inside the circular spokes 7 of the cutter disc and is welded to the bottom of the shell cutter guide rail 1; the driving mechanism 6 is located inside the sealing box 3 and connected to the shell cutter assembly 2, and is used to drive the shell cutter assembly 2 to move along the shell cutter guide rail 1.

[0051] See Figure 2 The drive mechanism 6 includes a top frame 6.1, a cam 6.2, a bearing seat 6.3, and a drive motor 6.4. The bearing seat 6.3 and the drive motor 6.4 are fixedly installed on the bottom side inside the sealing box 3. The drive shaft of the drive motor 6.4 is connected to the bearing seat 6.3 through a bearing, and the end of the drive shaft is connected to the cam 6.2. One end of the top frame 6.1 is connected to the bottom of the shell cutter assembly 2, and the other end is in contact with the outer contour of the cam 6.2. The outer contour of the cam 6.2 is an eccentric circle, and the maximum distance that the cam 6.2 rotates to drive the top frame 6.1 to move is equal to the wear compensation amount of the shell cutter assembly 2.

[0052] In this embodiment, the bottom of the sealing box 3 is provided with a wire hole 3.1, and the motor wire 6.5 of the drive motor 6.4 passes through the wire hole 3.1 and enters the cutter head busbar; the acoustic emission sensor signal wire 4.1 passes through the signal wire hole 2.5, the signal wire hole 1.4 and the wire hole 3.1 in sequence and then enters the cutter head busbar.

[0053] See Figures 2-4 The locking mechanism 5 is disposed between the shell cutter assembly 2 and the shell cutter guide rail 1, and includes an elastic element 5.1 and a pin 5.2. The elastic element 5.1 is connected to the pin 5.2. In this embodiment, the elastic element 5.1 is preferably a spring.

[0054] See Figure 4 The shell-shaped knife body 2.2 has a set of pin holes 2.4 offset on its left and right side walls (i.e., a pin hole 2.4 is provided on each of the two side walls), and the end of the elastic element 5.1 away from the pin shaft 5.2 is fixed in the pin hole 2.4;

[0055] See Figure 3 The guide groove 1.1 has a set of locking grooves 1.3 offset on two opposite sides along its length (i.e., there is one locking groove 1.3 on each of the two sides; if multi-level wear compensation is to be achieved, multiple locking grooves 1.3 are set on a single side along the moving direction of the shell cutter body 2.2). The pin 5.2 cooperates with the locking grooves 1.3 to lock the shell cutter body 2.2 and the shell cutter guide rail 1.

[0056] In this embodiment, see Figure 3 The locking groove 1.3 is a semi-teardrop shaped groove, that is, the upper part is a sloping groove and the lower part is a round hole; see also Figure 2The cross-sectional shape of the locking groove 1.3 (cut along the longitudinal axis of symmetry of the semi-teardrop groove) is trapezoidal, and its inner top surface is inclined, which facilitates the sliding of the pin 5.2 when the drive motor 6.4 drives the shell knife assembly 2 to move, so that the locking mechanism 5 is in the unlocked state, so as to realize the wear compensation of the shell knife assembly 2.

[0057] In this embodiment, a main control system is also included. The main control system is connected to the acoustic emission sensor and the drive motor 6.4, and can receive the frequency domain signal of the acoustic emission sensor in real time and control the drive motor 6.4 to perform corresponding actions.

[0058] For specific usage, please refer to Figure 2 In the initial state, the spring in the left pin hole of the shell cutter body 2.2 is in a compressed state, and the pin 5.2 connected to the spring abuts against the side wall of the guide groove 1.1, that is, the locking mechanism 5 located on the left side of the shell cutter body 2.2 is in an unlocked state; the spring in the right pin hole of the shell cutter body 2.2 is in an uncompressed state, and the pin 5.2 connected to the spring is located in the round hole of the right locking groove 1.3, that is, the locking mechanism 5 located on the right side of the shell cutter body 2.2 is in a locked state;

[0059] The acoustic emission sensor monitors the frequency domain signal of the wear of the shell cutter head 2.1 in real time. When the wear of the shell cutter head 2.1 reaches the set wear threshold, the main control system controls the drive motor 6.4 to operate. The drive shaft rotates, causing the cam 6.2 to rotate, which in turn causes the top frame 6.1 to push the shell cutter assembly 2 upward. At this time, the pin shaft in the right locking groove 1.3 moves upward and contacts the inclined surface of the locking groove 1.3, so that the locking mechanism 5 on the right side of the shell cutter body 2.2 is in the unlocked state. When the upward movement distance of the shell cutter assembly 2 meets the wear amount to be compensated, the main control system controls the drive motor 6.4 to stop operating. At this time, the pin hole on the left side of the shell cutter body 2.2 corresponds to the round hole of the locking groove 1.3. Under the action of the spring compression force, the pin shaft 5.2 is driven into the round hole of the left locking groove 1.3 to achieve locking. Through the above operation, the automatic compensation of the wear of the shell cutter head 2.1 is achieved.

[0060] This embodiment also provides a tunnel boring machine, including a cutterhead, on which a shell cutter system capable of online wear monitoring and compensation as described above is provided. By using this shell cutter system, online wear monitoring can be achieved, and the amount of wear can be automatically compensated, thereby extending the service life of the shell cutter and reducing construction costs.

[0061] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shell cutting tool system with online wear monitoring and compensation, characterized in that, It includes a shell cutter guide rail (1), a shell cutter assembly (2), a sealing box (3), a wear monitoring device (4), a locking mechanism (5), and a drive mechanism (6); The shell cutter guide rail (1) is fixedly connected to the circular spokes (7) of the cutter disc; The sealing box (3) is set inside the circular spokes (7) of the cutter head and is fixedly connected to the shell cutter guide rail (1); The shell knife assembly (2) is embedded in the shell knife guide rail (1) and can move along the shell knife guide rail (1); The wear monitoring device (4) is mounted on the shell cutter assembly (2); The drive mechanism (6) is located inside the sealing box (3) and connected to the shell knife assembly (2), and is used to drive the shell knife assembly (2) to move along the shell knife guide rail (1); The locking mechanism (5) is located between the shell cutter assembly (2) and the shell cutter guide rail (1). The locking mechanism (5) and the driving mechanism (6) work together to achieve wear compensation of the shell cutter assembly (2).

2. The shell cutting tool system with online wear monitoring and compensation according to claim 1, characterized in that, The shell cutter guide rail (1) is provided with a guide groove 1 (1.1), and a guide groove 2 (1.2) is provided through the bottom surface of the guide groove 1 (1.1). The guide groove 1 (1.1) and the guide groove 2 (1.2) form a receiving cavity for inserting the shell cutter assembly (2).

3. The shell cutting tool system with online wear monitoring and compensation according to claim 2, characterized in that, Multiple sealing grooves (1.5) are provided on the inner wall of the guide groove two (1.2) along the axial direction of the guide groove two (1.2), and a sealing ring is provided in the sealing groove (1.5).

4. A shell cutting tool system with online wear monitoring and compensation according to claim 2, characterized in that, The shell cutter assembly (2) includes a shell cutter head (2.1) and a shell cutter body (2.2), the shell cutter head (2.1) and the shell cutter body (2.2) are fixedly connected; a cavity (2.3) is provided at the connection between the shell cutter head (2.1) and the shell cutter body (2.2), and the wear monitoring device (4) is disposed in the cavity (2.3); the wear monitoring device (4) adopts an acoustic emission sensor.

5. A shell cutting tool system with online wear monitoring and compensation according to claim 4, characterized in that, The shell knife body (2.2) is disposed in the receiving cavity formed by guide groove one (1.1) and guide groove two (1.2); the bottom of the shell knife body (2.2) is connected to a limiting block (9) by bolts (8), and the radial dimension of the limiting block (9) is greater than the radial dimension of guide groove two (1.2).

6. A shell cutting tool system with online wear monitoring and compensation according to claim 5, characterized in that, A gap is reserved between the limiting block (9) and the shell knife guide rail (1), and the gap is greater than the wear compensation amount of the shell knife assembly (2).

7. A shell cutting tool system with online wear monitoring and compensation according to claim 4, characterized in that, The locking mechanism (5) includes an elastic element (5.1) and a pin (5.2), wherein the elastic element (5.1) is connected to the pin (5.2); At least one set of pin holes (2.4) are offset on the two opposite side walls of the shell blade body (2.2), and the end of the elastic element (5.1) away from the pin shaft (5.2) is fixed in the pin hole (2.4); At least one set of locking grooves (1.3) are offset on the two opposite sides of the guide groove (1.1). The pin (5.2) cooperates with the locking groove (1.3) to lock the shell knife body (2.2) and the shell knife guide rail (1).

8. A shell cutting tool system with online wear monitoring and compensation according to claim 7, characterized in that, The locking groove (1.3) has a trapezoidal cross-sectional shape, and the inner top surface of the locking groove (1.3) is an inclined surface.

9. A shell cutting tool system with online wear monitoring and compensation according to any one of claims 1-8, characterized in that, The drive mechanism (6) includes a top frame (6.1), a cam (6.2), a bearing seat (6.3), and a drive motor (6.4). The bearing seat (6.3) and the drive motor (6.4) are fixedly installed on the bottom side inside the sealing box (3). The drive shaft of the drive motor (6.4) is connected to the bearing seat (6.3) through a bearing, and the end of the drive shaft is connected to the cam (6.2). One end of the top frame (6.1) is connected to the shell cutter assembly (2), and the other end is in contact with the outer contour of the cam (6.2). The outer contour of the cam (6.2) is an eccentric circle, and the maximum distance that the cam (6.2) rotates to drive the top frame (6.1) to move is equal to the wear compensation amount of the shell cutter assembly (2).

10. A tunnel boring machine, comprising a cutterhead, characterized in that, The cutter head is equipped with a shell cutter system capable of online wear monitoring and compensation as described in any one of claims 1-9.

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