A blade wear monitoring and speed adaptive adjustment system and a screw conveyor

Abstract

This utility model relates to the field of tunnel construction technology, specifically providing a blade wear monitoring and speed adaptive adjustment system and a screw conveyor. The system includes an online blade wear monitoring device, a main control room computer, and a speed adaptive adjustment system. The online blade wear monitoring device is mounted on the cylinder of the screw conveyor. The speed adaptive adjustment system is connected to the drive unit of the screw conveyor's drive shaft. The main control room computer is connected to both the online blade wear monitoring device and the speed adaptive adjustment system. In this utility model, the online blade wear monitoring device monitors the blade wear in real time, facilitating timely repair of worn blades and preventing slag discharge failure due to severe blade wear. Furthermore, the speed adaptive adjustment system dynamically adjusts the drive shaft speed according to the blade wear condition, reducing blade wear while ensuring the screw conveyor's slag discharge capacity.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a blade wear monitoring and speed adaptive adjustment system and a screw conveyor. Background Technology

[0002] Earth pressure balance tunnel boring machines (TBMs), as a safe and efficient tunnel construction equipment, are widely used in the field of tunnel construction. During tunnel excavation, they use screw conveyors to discharge excavated soil. A screw conveyor generally consists of a drive unit, a screw shaft, a cylinder, and a muck discharge gate. Under normal circumstances, the drive unit rotates the screw shaft blades, causing the excavated soil to move within the cylinder, fall through the tail muck discharge gate onto a belt conveyor, and then be transported to muck trucks for delivery out of the tunnel. Because the excavated soil is driven by the rotating screw shaft, some soil adheres to the cylinder, causing relative motion wear on the blades, especially in hard rock formations with gravel, resulting in severe wear on the outer surface of the blades. Simultaneously, the screw shaft is only fixed at one end of the drive unit; the end near the bottom of the soil chamber is a cantilever structure. Due to gravity, the screw shaft blades at this end sink and come into contact with the inner wall of the cylinder, causing contact wear during blade rotation. As the construction area and tunnel length increase, and the geological conditions worsen, the wear rate of the blades is greatly accelerated. Once the blade wear exceeds a certain level, the screw conveyor will be unable to discharge excavated soil, requiring shutdown for repair. According to actual wear experience, the closer the blades are to the soil chamber, the more severe the wear, the narrower the processing space, and the greater the difficulty, which poses great safety hazards and economic losses to construction and production.

[0003] Common measures to address blade wear include: first, strengthening blade wear resistance during the design phase to extend service life; second, disassembling and inspecting the screw conveyor after the tunnel boring machine has advanced a certain distance, and repairing worn blades. However, in reality, wear caused by the geological strata is often unpredictable, leading construction units to frequently only discover the problem when blade wear becomes so severe during tunnel excavation that muck cannot be discharged, causing delays and safety hazards. Traditional monitoring methods involve periodically stopping the machine and having personnel open the screw conveyor's inspection port to inspect various parts of the screw shaft blades, especially those near the soil chamber. This method is time-consuming, labor-intensive, and prone to inaccurate manual measurements, making it impractical. Furthermore, general wear detection requires installation on the object being tested, which is not feasible for screw shaft blades, as they are moving parts with a helical shape.

[0004] Based on the above, this utility model provides a blade wear monitoring and speed adaptive adjustment system and a screw conveyor to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a blade wear monitoring and speed adaptive adjustment system and a screw conveyor, the specific technical solution of which is as follows:

[0006] A blade wear monitoring and adaptive speed adjustment system includes an online blade wear monitoring device, a main control room computer, and an adaptive speed adjustment system;

[0007] The blade wear online monitoring device is installed on the cylinder of the screw conveyor; the speed adaptive adjustment system is connected to the drive device of the screw conveyor drive shaft; the main control room computer is connected to both the blade wear online monitoring device and the speed adaptive adjustment system, and is used to provide real-time feedback on the wear amount of the drive shaft blades and issue early warnings, as well as to control the speed adaptive adjustment system to adjust the drive shaft speed.

[0008] Furthermore, the blade wear online monitoring device includes a magnetic sensor, a signal conversion module, a signal processing module, a transmitter, and a signal receiver connected in sequence.

[0009] The magnetic sensors are provided in multiple ways and are evenly arranged along the circumference of the cylinder; the input end of the signal conversion module is connected to the magnetic sensors, and the output end of the signal receiver is connected to the computer in the main control room.

[0010] Furthermore, the magnetic sensor is installed in a position that avoids the contact wear area between the drive shaft blades and the cylinder.

[0011] Furthermore, the cylinder has multiple through holes; the magnetic sensor includes a chip, a permanent magnet and a mounting base, the permanent magnet is embedded in the through holes and fixed to the cylinder by the mounting base; the chip is embedded in the permanent magnet.

[0012] Furthermore, the mounting base is sealed to the cylinder, and a sealing structure is provided between the through hole and the permanent magnet.

[0013] Furthermore, the adaptive speed adjustment system includes a speed regulator, which is connected to the drive device.

[0014] Furthermore, it also includes a speed sensor, which is mounted on the drive unit and connected to the speed regulator.

[0015] Furthermore, the main control room computer is equipped with an early warning program module, and the speed adaptive adjustment system is connected to the early warning program module to dynamically adjust the speed of the drive shaft according to the wear of the drive shaft blades and the early warning threshold.

[0016] Furthermore, the early warning program module is configured with four levels of early warning thresholds: green warning, yellow warning, orange warning, and red warning.

[0017] A green warning corresponds to a blade wear amount D≤10mm, limiting the speed of the drive shaft (5) to 80% of the maximum speed; a yellow warning corresponds to a blade wear amount 10mm<D≤30mm, limiting the speed of the drive shaft (5) to 90% of the maximum speed; an orange warning corresponds to a blade wear amount 30mm<D≤60mm, limiting the speed of the drive shaft (5) to the maximum speed; a red warning corresponds to a blade wear amount D>60mm, triggering a system alarm.

[0018] A screw conveyor includes a blade wear monitoring and speed adaptive adjustment system as described above, used to monitor the wear of the drive shaft blades in real time and adjust the speed of the drive shaft based on the monitoring data.

[0019] The application of the technical solution of this utility model has the following beneficial effects:

[0020] (1) This utility model provides a blade wear monitoring and speed adaptive adjustment system, including an online blade wear monitoring device, a main control room computer, and a speed adaptive adjustment system; the online blade wear monitoring device is installed on the cylinder of the screw conveyor; the speed adaptive adjustment system is connected to the drive device of the screw conveyor drive shaft; the main control room computer is connected to both the online blade wear monitoring device and the speed adaptive adjustment system, and is used to provide real-time feedback on the wear of the drive shaft blades and issue early warnings, as well as to control the speed adaptive adjustment system to adjust the drive shaft speed. In this utility model, the blade wear monitoring device monitors the blade wear in real time, so as to repair the worn blades in a timely manner and avoid the inability to discharge slag due to severe blade wear; in addition, the speed adaptive adjustment system dynamically adjusts the speed of the drive shaft according to the blade wear, which can reduce the degree of blade wear while ensuring the slag discharge of the screw conveyor.

[0021] (2) In this utility model, a magnetic sensor is used to detect the wear of the blades, and the magnetic sensor is set on the cylinder. The wear of the blades can be obtained without any processing of the moving parts (blades), which is convenient and practical.

[0022] (3) In this utility model, the main control room computer is equipped with an early warning program module. The early warning program module sets four levels of early warning thresholds and provides timely early warning based on the real-time monitored blade wear data. The speed adaptive adjustment system adjusts the peak speed of the drive shaft according to the real-time monitored blade wear data and the early warning threshold to ensure the stability of the slag output of the screw conveyor and reduce the wear degree of the blades.

[0023] (4) In this utility model, according to the set early warning program, the risk corresponding to the wear degree of the blade can be reminded in real time, and the wear of the blade can be predicted in advance whether it has reached the point where it cannot discharge slag, so as to make timely repairs and avoid downtime failure.

[0024] (5) This utility model also provides a screw conveyor, including the blade wear monitoring and speed adaptive adjustment system as described above, which is used to monitor the wear of the drive shaft blades in real time and adjust the speed of the drive shaft according to the monitoring data, so as to meet the stability of the slag discharge and reduce the degree of blade wear, thereby reducing the occurrence of slag discharge failure due to severe blade wear during construction.

[0025] 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

[0026] 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:

[0027] Figure 1 This is a schematic diagram of the blade wear monitoring and speed adaptive adjustment system in an embodiment of this utility model;

[0028] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 yes Figure 1 Schematic diagram of the BB cross section in the middle;

[0030] Figure 4 yes Figure 3 Enlarged view of point C in the middle;

[0031] Among them, 1. Blade wear online monitoring device, 1.1 Magnetic sensor, 1.1.1 Chip, 1.1.2 Permanent magnet, 1.1.3 Mounting base, 1.2 Signal conversion module, 1.3 Signal processing module, 1.4 Transmitter, 1.5 Signal receiver, 2. Main control room computer, 3. Speed ​​adaptive adjustment system, 4. Cylinder, 5. Drive shaft, 5.1 Drive shaft blade, 6. Sealing structure. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Example

[0036] See Figure 1 This embodiment provides a blade wear monitoring and speed adaptive adjustment system, including a blade wear online monitoring device 1, a main control room computer 2, and a speed adaptive adjustment system 3. The blade wear online monitoring device 1 is installed on the cylinder 4 of the screw conveyor. In this embodiment, the cylinder 4 is a section of the cylinder corresponding to the most easily worn position of the drive shaft blade 5.1 of the screw conveyor. The speed adaptive adjustment system 3 is connected to the drive device of the screw conveyor drive shaft 5. The main control room computer 2 is connected to both the blade wear online monitoring device 1 and the speed adaptive adjustment system 3, and is used to provide real-time feedback on the wear amount of the drive shaft blade 5.1 and issue early warnings. Based on the wear amount of the drive shaft blade 5.1, the computer controls the speed adaptive adjustment system 3 to adjust the peak speed of the drive shaft, ensuring the stability of the slag output of the screw conveyor and reducing the wear degree of the drive shaft blade 5.1.

[0037] In this embodiment, see Figure 1 The blade wear online monitoring device 1 includes a magnetic sensor 1.1, a signal conversion module 1.2, a signal processing module 1.3, a transmitter 1.4, and a signal receiver 1.5 connected in sequence.

[0038] Multiple magnetic sensors 1.1 are provided, and the multiple magnetic sensors 1.1 are evenly arranged along the circumference of the cylinder; the input end of the signal conversion module 1.2 is connected to the magnetic sensor 1.1, and the output end of the signal receiver 1.5 is connected to the main control room computer 2.

[0039] The cylinder 4 has multiple through holes; see also Figure 2The magnetic sensor 1.1 includes a chip 1.1.1, a permanent magnet 1.1.2, and a mounting base 1.1.3. The permanent magnet 1.1.2 is embedded in a through hole and fixed to the cylinder 4 by the mounting base 1.1.3. The permanent magnet 1.1.2 and the mounting base 1.1.3 are connected by bolts and use an end-face seal to meet the requirement that the magnetic sensor does not leak under 1MPa and 120℃ conditions. At the same time, the mounting base 1.1.3 is sealed to the cylinder 4. Preferably, in this embodiment, welding is used to fix the permanent magnet 1.1.2 and the chip 1.1.1 and prevent the cylinder 4 from vibrating and falling off. A sealing structure 6 is provided between the through hole and the permanent magnet 1.1.2. In this embodiment, the sealing structure uses sealant, which is poured into the gap between the through hole and the permanent magnet 1.1.2 to fix and seal.

[0040] The chip 1.1.1 is embedded within the permanent magnet 1.1.2, and is connected to the signal conversion module 1.2. The permanent magnet 1.1.2 extends into the inner wall of the cylinder 4, forming a magnetic field between itself and the metal drive shaft blade 5.1. When the drive shaft blade 5.1 wears, it causes a change in the distribution of magnetic field lines, resulting in a change in the magnetic flux density of the chip 1.1.1 embedded within the permanent magnet 1.1.2. This causes the chip to output an analog differential signal indicating blade wear, which is then transmitted via cable to the signal conversion module 1.2 and converted into an electrical signal. The signal processing module 1.3 aggregates the electrical signals output from the multi-route signal conversion module 1.2, processes them, converts them into digital signals, and transmits them to the transmitter 1.4. The data is then wirelessly transmitted to the signal receiver 1.5, and finally connected to the main control room computer 2 for real-time online monitoring of blade wear and intuitive display of blade wear data.

[0041] In this embodiment, the magnetic sensor 1.1 is installed along the circumference of the cylinder 4, avoiding the contact wear area between the drive shaft blade 5.1 and the cylinder 4. In this embodiment, one end of the drive shaft 5 is connected to a drive device, which provides power to rotate the drive shaft 5, and the other end of the drive shaft 5 extends into the soil chamber for slag discharge. Because there is a lot of slag and gravel inside the cylinder 4 near the soil chamber, the slag and gravel will cause severe wear on the blades when the drive shaft 5 rotates to discharge slag; at the same time, the drive shaft 5 near the soil chamber end is a cantilever structure, and the drive shaft blade 5.1 sinks down and contacts the lower inner wall of the cylinder 4 inside the cylinder, which will aggravate the blade wear. Therefore, the upper part of the cylinder 4, which is not easily worn, is selected as the installation point of the magnetic sensor 1.1. When the drive shaft blade 5.1 is worn out during operation, it rotates into the measurement range of the magnetic sensor 1.1, and the blade wear value can be obtained.

[0042] In this embodiment, the adaptive speed adjustment system 3 includes a speed regulator connected to the drive unit. It also includes a speed sensor mounted on the drive unit and connected to the speed regulator. The speed sensor detects the speed of the drive shaft 5 and transmits it to the speed regulator, which is connected to the main control room computer 2.

[0043] In this embodiment, the main control room computer 2 is equipped with an early warning program module, and the speed regulator is connected to the early warning program module to dynamically adjust the speed of the drive shaft 5 according to the wear amount of the drive shaft blades 5.1 and the early warning threshold.

[0044] The early warning program module is set with four levels of early warning thresholds: green, yellow, orange, and red.

[0045] A green warning corresponds to a blade wear amount D≤10mm, limiting the speed of the drive shaft (5) to 80% of the maximum speed; a yellow warning corresponds to a blade wear amount 10mm<D≤30mm, limiting the speed of the drive shaft (5) to 90% of the maximum speed; an orange warning corresponds to a blade wear amount 30mm<D≤60mm, limiting the speed of the drive shaft (5) to the maximum speed; a red warning corresponds to a blade wear amount D>60mm, triggering a system alarm.

[0046] In practical applications, the specific steps include:

[0047] Step A: Installation of the online blade wear monitoring device:

[0048] A1. The closer the drive shaft blade 5.1 is to the soil chamber, the more severe the wear. At the same time, the wear of the cylinder 4 is mainly concentrated in the lower area, while the wear in the upper area is very small. Therefore, multiple through holes are opened at the front end of the drive shaft blade 5.1 in the upper area of ​​the cylinder 4.

[0049] A2. The permanent magnet 1.1.2 is embedded in the through hole opened in the cylinder 4, and the mounting base 1.1.3 is welded to the outer wall of the cylinder 4 to fix the entire magnetic sensor 1.1.

[0050] A3. The space between the permanent magnet 1.1.2 and the through hole of the cylinder 4 is filled with sealant to enhance the fixing and sealing effect and prevent water leakage;

[0051] A4. A magnetic field is formed between the permanent magnet 1.1.2 and the drive shaft blade 5.1. The wear of the blade causes a change in the magnetic flux density of the chip 1.1.1 embedded inside the permanent magnet 1.1.2, which in turn outputs an analog differential signal of blade wear.

[0052] A5. The chip 1.1.1 connector is connected to the signal conversion module 1.2 via a cable to convert the analog differential signal after the wear of the drive shaft blade 5.1 into an electrical signal;

[0053] A6. Signal processing module 1.3 summarizes the electrical signals output from the multi-route signal conversion module 1.2, processes them, and converts them into digital signals for transmission to transmitter 1.4;

[0054] A7. Transmitter 1.4 transmits data wirelessly to signal receiver 1.5, which is then connected to the main control room computer platform system 2 to provide real-time feedback on blade wear.

[0055] Step B, Magnetic sensor 1.1 detects blade wear, see [link / reference] Figure 3 and Figure 4 :

[0056] B1. Based on actual cases, the slag discharge will be affected after the drive shaft blade 5.1 wears 60mm. At the same time, the gap between the drive shaft blade 5.1 and the cylinder 4 is generally designed to be 10-20mm. Therefore, the detection distance range of the magnetic sensor 1.1 is set to 80mm.

[0057] B2. Rotate the drive shaft 5 so that the outer surface of the drive shaft blade 5.1 is close to the range of the magnetic sensor 3. At this time, the value is displayed on the computer 2 in the main control room.

[0058] B3. Drive shaft 5 rotates one revolution, and select the minimum value from a set of range values ​​displayed as the initial measurement value D1;

[0059] B4. After a period of use, the outer surface of the drive shaft blades will wear. At this time, select the minimum value of a range, D2, as the real-time measurement value.

[0060] B5. The difference between the real-time measurement value D2 and the initial measurement value D1 is the blade wear amount D.

[0061] Step C: Activate the adaptive speed adjustment system function:

[0062] C1. Install a speed sensor on the drive unit;

[0063] C2. Connect the speed sensor and the speed regulator via a wiring connection;

[0064] C3. Set four warning thresholds in the warning program module of the main control room computer platform system, including green warning (blade wear D≤10mm), yellow warning (blade wear 10mm<D≤30mm), orange warning (blade wear 30mm<D≤60mm), and red warning (blade wear D>60mm). Real-time warnings are issued based on the data from online monitoring of blade wear.

[0065] C4. When the warning threshold is a green warning: the peak speed of the drive shaft 5 can be automatically adjusted according to the remaining tunneling mileage and geological conditions, and limited to 80% of the maximum speed of the equipment, so as to reduce the wear of the drive shaft blades 5.1 while meeting the equipment's slag discharge requirements.

[0066] When the warning threshold is yellow: the peak speed of drive shaft 5 is automatically adjusted to limit it to 90% of the maximum speed of the equipment, so as to offset the impact of reduced slag discharge efficiency caused by wear of drive shaft blades 5.1 and stabilize the slag discharge of the equipment;

[0067] When the warning threshold is orange: In addition to the yellow warning treatment, a pop-up reminder will be given to pay close attention to the wear of drive shaft blade 5.1, and the peak speed of drive shaft 5 will be adaptively increased to 100% of the equipment's maximum speed;

[0068] When the warning threshold is red, the system will issue an alarm and recommends immediately repairing the worn areas of the blades, strengthening their wear resistance, and preventing severe blade wear that could lead to slag discharge failure.

[0069] The blade wear monitoring and speed adaptive adjustment system provided by this utility model is equipped with an online blade wear monitoring device 1 on the cylinder 4 corresponding to the most wear-prone area of ​​the drive shaft blade 5.1. The device monitors the blade wear in real time and transmits the data to the main control room computer 2 platform system, which displays the blade wear status intuitively. The main control room computer 2 is equipped with an early warning program module. Based on the different monitored values ​​and early warning thresholds, the drive shaft speed peak is automatically adjusted by the speed adaptive adjustment system 3 to ensure stable slag output of the screw conveyor and reduce blade wear. It has early warning and handling capabilities, improves equipment automation, and reduces the incidence of slag discharge failure due to severe blade wear during construction.

[0070] This utility model also provides a screw conveyor, including the blade wear monitoring and speed adaptive adjustment system as described above, which is used to monitor the wear of the drive shaft blades in real time and adjust the speed of the drive shaft 5 according to the monitoring data, so as to ensure the stability of the slag discharge and reduce the degree of blade wear, thereby reducing the occurrence rate of slag discharge failure due to severe blade wear during construction.

[0071] 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 blade wear monitoring and adaptive speed adjustment system, characterized in that, It includes an online blade wear monitoring device (1), a main control room computer (2), and a speed adaptive adjustment system (3); The blade wear online monitoring device (1) is installed on the cylinder (4) of the screw conveyor; the speed adaptive adjustment system (3) is connected to the drive device of the screw conveyor drive shaft (5); the main control room computer (2) is connected to the blade wear online monitoring device (1) and the speed adaptive adjustment system (3) respectively, for real-time feedback of the wear amount of the drive shaft blade (5.1) and early warning, and for controlling the speed adaptive adjustment system (3) to adjust the speed of the drive shaft.

2. A blade wear monitoring and rotational speed self-adaptive adjustment system according to claim 1, characterized in that, The blade wear online monitoring device (1) includes a magnetic sensor (1.1), a signal conversion module (1.2), a signal processing module (1.3), a transmitter (1.4), and a signal receiver (1.5) connected in sequence. The magnetic sensor (1.1) is provided in multiple ways, and the multiple magnetic sensors (1.1) are evenly arranged around the cylinder (4); the input end of the signal conversion module (1.2) is connected to the magnetic sensor (1.1), and the output end of the signal receiver (1.5) is connected to the main control room computer (2).

3. A blade wear monitoring and rotational speed self-adapting adjustment system according to claim 2, characterized in that The magnetic sensor (1.1) is installed in a position that avoids the contact wear area between the drive shaft blade (5.1) and the cylinder (4).

4. A blade wear monitoring and rotational speed self-adapting adjustment system according to claim 3, characterized in that The cylinder (4) has multiple through holes; the magnetic sensor (1.1) includes a chip (1.1.1), a permanent magnet (1.1.2) and a mounting base (1.1.3). The permanent magnet (1.1.2) is embedded in the through hole and fixed to the cylinder (4) by the mounting base (1.1.3); the chip (1.1.1) is embedded in the permanent magnet (1.1.2).

5. A blade wear monitoring and rotational speed self-adapting adjustment system according to claim 4, characterized in that The mounting base (1.1.3) is sealed to the cylinder (4), and a sealing structure (6) is provided between the through hole and the permanent magnet (1.1.2).

6. The blade wear monitoring and speed adaptive adjustment system according to claim 1, characterized in that, The adaptive speed adjustment system (3) includes a speed regulator, which is connected to the drive device.

7. A blade wear monitoring and rotational speed self-adapting adjustment system according to claim 6, characterized in that It also includes a speed sensor, which is mounted on the drive unit and connected to the speed regulator.

8. A blade wear monitoring and rotational speed self-adapting adjustment system according to any one of claims 1-7, characterized in that, The main control room computer (2) is equipped with an early warning program module. The speed adaptive adjustment system (3) is connected to the early warning program module and is used to dynamically adjust the speed of the drive shaft (5) according to the wear amount of the drive shaft blade (5.1) and the early warning threshold.

9. A blade wear monitoring and rotational speed self-adapting adjustment system according to claim 8, characterized in that The early warning program module is set with four levels of early warning thresholds: green, yellow, orange, and red. A green warning corresponds to a blade wear amount D≤10mm, limiting the speed of the drive shaft (5) to 80% of the maximum speed; a yellow warning corresponds to a blade wear amount 10mm<D≤30mm, limiting the speed of the drive shaft (5) to 90% of the maximum speed; an orange warning corresponds to a blade wear amount 30mm<D≤60mm, limiting the speed of the drive shaft (5) to the maximum speed; a red warning corresponds to a blade wear amount D>60mm, triggering a system alarm.

10. A screw conveyor, characterized by Includes the blade wear monitoring and speed adaptive adjustment system as described in any one of claims 1-9, used to monitor the wear of the drive shaft blades in real time and adjust the speed of the drive shaft (5) according to the monitoring data.

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