Shield cutter wear degree detection device
Patent Information
- Application Number
- CN202522777341.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-29
AI Technical Summary
Traditional shield machine cutter wear detection devices are inefficient and subject to subjective errors, and linear displacement sensor probes are prone to wear or signal distortion under high-speed rotation and complex stress.
A shield tunneling cutter wear detection device is designed, which uses a wear-resistant reference body and a non-contact displacement sensor. The reference body is kept in contact with the cutter ring by a gas spring, and the displacement change of the reference body is captured in real time by a linear displacement sensor. Combined with a detachable wear-resistant probe and a geared motor drive, the device can continuously collect dynamic wear data.
It improves detection accuracy and equipment lifespan, avoids the inefficiency and mechanical wear risks of traditional methods, and achieves real-time and reliable wear data acquisition.
Smart Images
Figure CN224933460U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of shield tunnel cutter head detection technology, and in particular to a shield cutter head wear detection device. Background Technology
[0002] Cutting cutters are key cutting tools in tunnel boring machines (TBMs) and tunnel excavators, used to break rocks, soil, and other media. During the tunneling process, TBM cutting tools will be subjected to varying degrees of wear. If they are not dealt with in a timely manner, it will seriously affect the tunneling efficiency and construction safety of the TBM, causing delays in the construction period.
[0003] Wear simulation testing of tunnel boring machine (TBM) cutterheads is a key auxiliary technology in modern tunnel engineering. It uses a simulation testing device in a safe and controlled laboratory environment to pre-simulate and evaluate the wear of the cutterheads in real strata, thereby providing a scientific basis for actual construction decisions. Traditional testing devices usually involve manual measurement of the cutterheads after wear tests. However, manual measurement is inefficient and prone to subjective errors, making it difficult to capture dynamic wear data in real time. There are also devices that use linear displacement sensors to continuously contact the cutterhead ring and obtain wear data by measuring the displacement variables of the cutterheads. However, the probes need to be in continuous contact with the cutterhead rings, which can easily lead to probe wear or signal distortion under high-speed rotation and complex stress.
[0004] Therefore, to address the aforementioned issues, a shield tunneling cutter wear detection device can be designed. A wear-resistant reference body that moves with the cutter is placed at the end of the expected wear trajectory of the cutter under test. A displacement sensor is placed in the non-stressed area of the cutter, with a replaceable wear-resistant probe connected to its front end. The probe tip is always pointed at the detection surface of the wear reference body with a slight pre-pressure. Through a non-contact displacement detection mechanism, the displacement change of the reference body is captured in real time, thereby accurately calculating the cutter wear data. This avoids the efficiency limitations and subjective errors of traditional manual measurement, and also avoids the mechanical wear risk caused by continuous sensor contact, achieving continuous and reliable acquisition of dynamic wear data. Utility Model Content
[0005] To overcome the limitations of traditional tunnel boring machine cutter wear detection devices, linear displacement sensors are used to continuously contact the cutter ring of the cutter and obtain wear data through its displacement variables. However, the probe needs to continuously contact the cutter ring, which can easily lead to probe wear or signal distortion under high-speed rotation and complex stress.
[0006] The technical solution of this utility model is as follows: a shield cutter wear detection device, including a base, a mounting frame at the upper end of the base, two sets of rotating connecting seats for assembling the cutter to be tested are symmetrically rotatably connected to the inner cavity side wall of the mounting frame, and a reference body set inside the mounting frame. Several gas springs are fixedly installed on one side of the reference body and are fixedly connected to the mounting frame. The reference body is made of high-strength, low-friction material. A detection mechanism is set inside the mounting frame, and a sample mechanism is set at the upper end of the base, located on one side of the mounting frame.
[0007] Preferably, during wear simulation, the hob rotates within the mounting frame via a rotating connecting seat and wears against the sample mechanism. At this time, the reference body remains in contact with the hob's cutter ring under the action of a gas spring, and the displacement change of the reference body is captured in real time by the detection mechanism to obtain the wear data of the cutter ring. This avoids the mechanical wear risk caused by continuous sensor contact, significantly improves the service life of the detection unit, and enhances the detection accuracy.
[0008] Preferably, the testing mechanism includes a packaging box fixedly installed on the upper part of the base frame, and a linear displacement sensor is installed inside the packaging box. The telescopic end of the linear displacement sensor passes through the packaging box and extends to the outside.
[0009] Preferably, the telescopic end of the linear displacement sensor is detachably connected to a wear-resistant probe via fasteners. One end of the wear-resistant probe is rounded and remains in continuous contact with the reference body.
[0010] Preferably, a geared motor is fixedly installed on the upper end of the base, and the output shaft of the geared motor is connected and fixed to a set of rotating connecting seats through a coupling.
[0011] Preferably, the sample mechanism includes a sliding frame and a hydraulic push rod. The sliding frame is slidably connected to the upper end of the base, and the hydraulic push rod is fixedly installed above the base. The telescopic end of the hydraulic push rod is fixedly connected to the sliding frame.
[0012] Preferably, the sample mechanism includes a positioning frame and a back plate fixedly installed on the upper end of the sliding frame. A rock mass sample is placed between the positioning frame and the back plate. A fixing frame for fixing the rock mass sample is fixedly installed on the side of the back plate near the rock mass sample by fasteners.
[0013] Preferably, two sets of inclined bracing frames are fixedly installed on the side of the back plate away from the rock mass sample, and the inclined bracing frames are fixedly connected to the sliding frame.
[0014] The beneficial effects of this utility model are: 1. During wear simulation, the reference body is always in contact with the cutter ring of the hob under the action of the gas spring, and the displacement data of the reference body is measured in real time by the detection mechanism. The wear-resistant probe of the linear displacement sensor obtains the wear data of the hob by measuring the displacement of the reference body. Through the non-contact displacement detection mechanism, the displacement change of the reference body is captured in real time, and the wear data of the hob is accurately calculated. This avoids the efficiency limitations and subjective errors of traditional manual measurement, and avoids the mechanical wear risk caused by continuous sensor contact, thus realizing the continuous and reliable acquisition of dynamic wear data. 2. The fixing frame secured by fasteners can be disassembled, making it easy to replace the rock sample between the positioning frame and the back plate. This allows different rock samples to be used as the testing basis, thereby detecting the wear of the cutting tool on different rocks. Attached Figure Description
[0015] Figure 1 The diagram shown is a first three-dimensional structural schematic of the shield tunneling cutter wear detection device of this utility model. Figure 2 The diagram shown is a second three-dimensional structural schematic of the shield tunneling cutter wear detection device of this utility model. Figure 3 The diagram shown is a three-dimensional structural diagram of the mounting frame for the shield cutter wear detection device of this utility model. Figure 4 This invention presents a shield tunneling cutter wear detection device. Figure 3 Enlarged 3D structural diagram of the circled area; Explanation of reference numerals in the attached drawings: 1. Base; 2. Gear motor; 3. Mounting bracket; 301. Rotary connecting seat; 4. Reference body; 401. Gas spring; 501. Encapsulation box; 502. Linear displacement sensor; 503. Wear-resistant probe; 601. Sliding frame; 602. Hydraulic push rod; 603. Positioning frame; 604. Back plate; 605. Fixing frame; 606. Rock mass sample; 607. Diagonal brace. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0017] Please see Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a shield tunneling cutter wear detection device, including a base 1, a mounting frame 3 at the upper end of the base 1, two sets of rotating connecting seats 301 for assembling the cutter to be tested symmetrically rotatably connected to the inner cavity side wall of the mounting frame 3, and a reference body 4 disposed inside the mounting frame 3. Several gas springs 401 are fixedly installed on one side of the reference body 4 and are fixedly connected to the mounting frame 3. The reference body 4 is made of high-strength, low-friction material. A detection mechanism is disposed inside the mounting frame 3, and a sample mechanism is disposed at the upper end of the base 1, located on one side of the mounting frame 3. During wear simulation operation, the cutter rotates within the mounting frame 3 through the rotating connecting seats 301 and wears against the sample mechanism. At this time, the reference body 4 is always in contact with the cutter ring of the cutter under the action of the gas springs 401, and the displacement change of the reference body 4 is captured in real time by the detection mechanism to obtain the wear data of the cutter ring. This avoids the mechanical wear risk caused by continuous sensor contact, significantly improves the service life of the detection unit, and improves the detection accuracy.
[0018] Please see Figure 3 and Figure 4 In this embodiment, the detection mechanism includes a packaging box 501 fixedly installed on the upper end of the base frame. A linear displacement sensor 502 is installed inside the packaging box 501. The telescopic end of the linear displacement sensor 502 passes through the packaging box 501 and extends to the outside. A wear-resistant probe 503 is detachably connected to the telescopic end of the linear displacement sensor 502 by fasteners. One end of the wear-resistant probe 503 is rounded and continuously contacts the reference body 4. By installing the linear displacement sensor 502 through the packaging box 501, external environmental interference factors such as dust and vibration can be effectively isolated, ensuring the measurement stability of the linear displacement sensor 502 under complex working conditions. The detachable structure design facilitates quick replacement and maintenance of the wear-resistant probe 503 after wear. The rounded corner treatment reduces the risk of stress concentration in the contact area between the wear-resistant probe 503 and the reference body 4, extending the probe's service life. A geared motor 2 is fixedly installed on the upper end of the base 1. The output shaft of the geared motor 2 is connected and fixed to a set of rotating connecting seats 301 through a coupling. The geared motor 2, in conjunction with the rotating mounting seats, achieves stable and reliable driving of the hob under test.
[0019] Please see Figure 1 and Figure 2In this embodiment, the sample mechanism includes a sliding frame 601 and a hydraulic push rod 602. The sliding frame 601 is slidably connected to the upper end of the base 1, and the hydraulic push rod 602 is fixedly installed above the base 1. The telescopic end of the hydraulic push rod 602 is fixedly connected to the sliding frame 601. The sample mechanism includes a positioning frame 603 and a back plate 604 fixedly installed on the upper end of the sliding frame 601. A rock mass sample 606 is disposed between the positioning frame 603 and the back plate 604. A fixing frame 605 for fixing the rock mass sample 606 is fixedly installed on the side of the back plate 604 near the rock mass sample 606 by fasteners. The rock mass sample 606 is secured by the back plate 604 and the positioning frame 603. The positioning of the sample mechanism is achieved in conjunction with the fixing frame 605. The detachable fixing frame 605 facilitates the replacement of different rock samples as the testing base, thereby detecting the wear of the cutting tool on different rocks. The hydraulic push rod 602 can be connected to an external pump station to provide power, pushing the sliding frame 601 to slide on the upper end of the base 1, so that the rock sample 606 contacts the roller cutter to be tested for wear testing. Two sets of inclined support frames 607 are fixedly installed on the side of the back plate 604 away from the rock sample 606. The inclined support frames 607 are fixedly connected to the sliding frame 601. The inclined support frames 607 effectively enhance the overall structural rigidity of the sample mechanism and reduce the risk of structural deformation under high-intensity wear operations.
[0020] During operation, the rotating connecting seat 301 is used to install the roller cutter to be tested, and the reference body 4 is brought into contact with the cutter ring of the roller cutter to be tested. Then, the linear displacement sensor 502 is adjusted so that the wear-resistant probe 503 installed at its telescopic end always points to the detection surface of the wear reference body 4 with a slight pre-pressure. Then, the rock sample 606 is placed between the positioning frame 603 and the back plate 604. Then, the fixing frame 605 is installed on the back plate 604 with fasteners to fix the rock sample 606. Then, the reduction motor 2 is started to drive the roller cutter under test to rotate steadily and slowly. Then, the hydraulic push rod 602 is connected to the external pump station to provide power and push the sliding frame 601 to slide on the upper end of the base 1, so that the rock sample 606 contacts the roller cutter under test to start the wear test. During the test, the wear-resistant probe 503 contacts the reference body 4, allowing the linear displacement sensor 502 to capture the displacement change of the reference body 4 in real time, thereby obtaining the wear data of the blade ring. This avoids the risk of mechanical wear caused by continuous contact of the sensor, significantly improves the service life of the linear displacement sensor 502, and enhances the detection accuracy.
[0021] Through the above steps, the sample mechanism simulates the tunneling environment and the wear of the cutter head. During this process, the reference body 4 is always in contact with the cutter head ring under the action of the gas spring 401, and the displacement data of the reference body 4 is measured in real time by the detection mechanism. The displacement change of the reference body 4 is captured in real time, avoiding the risk of mechanical wear caused by continuous sensor contact, significantly improving the service life of the detection unit and improving the detection accuracy. This solves the problem of traditional shield machine cutter wear detection devices, which use linear displacement sensors to continuously contact the cutter head ring and obtain the wear data of the cutter head through its displacement variables. However, the probe needs to be in continuous contact with the cutter head ring, which is prone to probe wear or signal distortion under high-speed rotation and complex stress.
[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A shield cutter wear detection device, comprising a base (1), a mounting frame (3) provided at the upper end of the base (1), and two sets of rotating connecting seats (301) for assembling the cutter to be tested symmetrically rotatably connected to the inner cavity sidewall of the mounting frame (3), characterized in that: It also includes a reference body (4) set inside the mounting frame (3). Several gas springs (401) are fixedly installed on one side of the reference body (4). The gas springs (401) are fixedly connected to the mounting frame (3). The reference body (4) is made of high-strength, low-friction material. A detection mechanism is set inside the mounting frame (3). A sample mechanism is set at the upper end of the base (1). The sample mechanism is located on one side of the mounting frame (3).
2. The shield cutter wear detection device according to claim 1, characterized in that: The testing mechanism includes a packaging box (501) fixedly installed on the upper part of the base frame. A linear displacement sensor (502) is installed inside the packaging box (501). The telescopic end of the linear displacement sensor (502) passes through the packaging box (501) and extends to the outside.
3. The shield cutter wear detection device according to claim 2, characterized in that: The telescopic end of the linear displacement sensor (502) is detachably connected to a wear-resistant probe (503) via fasteners. One end of the wear-resistant probe (503) is rounded and continuously in contact with the reference body (4).
4. The shield cutter wear detection device according to claim 1, characterized in that: A geared motor (2) is fixedly installed on the upper end of the base (1). The output shaft of the geared motor (2) is connected and fixed to a set of rotating connecting seats (301) through a coupling.
5. The shield tunneling cutter wear detection device according to claim 1, characterized in that: The sample mechanism includes a sliding frame (601) and a hydraulic push rod (602). The sliding frame (601) is slidably connected to the upper end of the base (1), and the hydraulic push rod (602) is fixedly installed above the base (1). The telescopic end of the hydraulic push rod (602) is fixedly connected to the sliding frame (601).
6. The shield tunneling cutter wear detection device according to claim 5, characterized in that: The sample mechanism includes a positioning frame (603) and a back plate (604) fixedly installed on the upper end of the sliding frame (601). A rock mass sample (606) is arranged between the positioning frame (603) and the back plate (604). A fixing frame (605) for fixing the rock mass sample (606) is fixedly installed on the side of the back plate (604) near the rock mass sample (606) by fasteners.
7. The shield cutter wear detection device according to claim 6, characterized in that: Two sets of inclined bracing frames (607) are fixedly installed on the side of the back plate (604) away from the rock mass sample (606), and the inclined bracing frames (607) are fixedly connected to the sliding frame (601).