Shield machine main drive sealing structure, manufacturing method and temperature monitoring method

Abstract

This invention relates to a sealing structure for the main drive of a tunnel boring machine (TBM), its manufacturing method, and a temperature monitoring method. The sealing structure includes: a sealing element body for sealing the main drive of the TBM, the sealing element body having a lip that seals against the drive shaft of the TBM's main drive in its assembled state; and at least one temperature sensor embedded within the sealing element body near the lip, the temperature sensor being used to collect temperature values ​​at or near the lip. This invention solves the technical problems of low real-time temperature measurement accuracy, poor reliability of measurement results, and complex installation structure of the measuring device in the sealing structure of the TBM's main drive.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel construction, further relates to a shield machine main drive sealing structure with temperature monitoring function, manufacturing method and temperature monitoring method, in particular to a polyurethane sealing structure, manufacturing method and temperature monitoring method. BACKGROUND

[0002] Real-time monitoring of the working state of the sealing element of the shield machine main drive can master the sealing working state of the shield machine main drive and timely warning processing. The key parameters affecting the performance of the sealing element mainly include the wear amount, temperature value and deformation amount of the sealing element. For the sealing element of polyurethane material, because of its poor high temperature resistance, when used in some high linear speed and high pressure working conditions, the heat generation is large, which seriously affects the performance of the sealing element, and the temperature change of the sealing lip needs to be monitored in real time.

[0003] At present, the temperature monitoring of the lip position of the polyurethane sealing element mostly adopts the method of indirect measurement, which indirectly calculates the lip temperature of the sealing element by measuring the temperature of the sealing friction plate in contact with the sealing lip. This method not only has low measurement accuracy and poor measurement reliability, but also has complex installation structure, and the actual use effect is not ideal.

[0004] Therefore, the present application is proposed by the present inventor with years of experience and practice in the relevant industry to overcome the defects of the prior art. SUMMARY

[0005] The purpose of the present application is to provide a shield machine main drive sealing structure, manufacturing method and temperature monitoring method, which can directly monitor the temperature change of the lip position of the sealing element of the shield machine main drive by embedding a temperature sensor in the lip position, has higher measurement accuracy and is more reliable.

[0006] The purpose of the present application is to provide a shield machine main drive sealing structure, manufacturing method and temperature monitoring method, which divides the lip position of the sealing element into segments, slots are opened on the end face, and the temperature sensor is embedded in the slot position and then casted and filled to realize accurate positioning and installation of the temperature sensor, and the installation structure is simple and convenient to operate.

[0007] The purpose of the present application can be achieved by the following scheme:

[0008] The present application provides a shield machine main drive sealing structure, which comprises:

[0009] a sealing element body for sealing the shield machine main drive, the sealing element body having a lip in sealing contact with a drive shaft of the shield machine main drive in an assembled state;

[0010] at least one temperature sensor embedded in the sealing body and close to the lip, the temperature sensor being used to collect temperature values at or close to the lip.

[0011] In a preferred embodiment of the present application, the sealing body has a positioning groove close to the lip, the temperature sensor is arranged in the positioning groove, and a data transmission line is connected to the temperature sensor and extends to the outside of the sealing body.

[0012] In a preferred embodiment of the present application, the sealing body comprises a body segment and a lip segment, a first recess is formed on one end surface of the body segment, and / or a second recess is formed on one end surface of the lip segment, and the first recess or the second recess or the first recess and the second recess cooperate to form the positioning groove when the end surface of the body segment and the end surface of the lip segment are in abutment.

[0013] A sealing filler is arranged at a gap position between the temperature sensor and the positioning groove.

[0014] In a preferred embodiment of the present application, the sealing filler is formed by pouring polyurethane liquid and solidifying at the gap position between the temperature sensor and the positioning groove.

[0015] In a preferred embodiment of the present application, the sealing body is made of polyurethane material.

[0016] In a preferred embodiment of the present application, the sealing body is in the form of an annular structure arranged along the outer periphery of the drive shaft of the main drive of the shield tunneling machine, and the number of temperature sensors is multiple, and the multiple temperature sensors are arranged in a circumferential interval along the sealing body.

[0017] In a preferred embodiment of the present application, the main drive sealing structure of the shield tunneling machine further comprises a data acquisition device and a display device, the temperature sensor is connected to the data receiving end of the data acquisition device through the data transmission line, and the data output end of the data acquisition device is connected to the data receiving end of the display device through the data transmission line.

[0018] The present application provides a manufacturing method of a main drive sealing structure of a shield tunneling machine, which is used to manufacture the main drive sealing structure of the shield tunneling machine as described above, and the manufacturing method comprises the following steps:

[0019] The sealing body is made in sections, wherein the sealing body comprises at least a body segment and a lip segment, and the body segment and the lip segment have matching end surfaces, respectively.

[0020] positioning and slotting on the end face of the body segment, or on the end face of the lip segment, or on the end face of the body segment and the end face of the lip segment respectively;

[0021] placing a temperature sensor in the slotting position and temporarily fixing it, and leading a data transmission line connected with the temperature sensor out of the seal body;

[0022] positioning the end face of the body segment and the end face of the lip segment, and reserving a gap between them;

[0023] casting a sealing adhesive in the gap position, and sealingly connecting the end face of the body segment and the end face of the lip segment;

[0024] sealingly connecting the end face of the body segment and the end face of the lip segment at different positions along the circumference of the seal body, and forming a whole circle of the seal body;

[0025] connecting the transmission line with a data acquisition device and a display device located outside.

[0026] In a preferred embodiment of the present application, the segmented seal body is made, comprising:

[0027] mixing polyurethane prepolymer with chain extender;

[0028] casting the mixed solution into at least a first mold and a second mold respectively;

[0029] vulcanizing and forming the body segment and the lip segment in the first mold and the second mold respectively.

[0030] In a preferred embodiment of the present application, the inner contour of the slotting position is larger than the outer contour of the temperature sensor, so that the temperature sensor is completely placed in the slotting position.

[0031] In a preferred embodiment of the present application, the inner wall of the slotting position is roughened to have a preset roughness.

[0032] In a preferred embodiment of the present application, the placing of the temperature sensor in the slotting position and the temporary fixing thereof comprise:

[0033] placing the end face of the body segment or the end face of the lip segment with the slotting position upward and keeping it horizontal;

[0034] coating glue on the bottom of the slotting position;

[0035] placing the temperature sensor in the slotting position, and the bottom of the temperature sensor is in contact with the glue.

[0036] In a preferred embodiment of the present application, the gap between the end face of the body segment and the end face of the lip segment is 5mm to 15mm.

[0037] In a preferred embodiment of the present application, the sealing connection between the end face of the body segment and the end face of the lip segment by pouring sealing connection agent at the gap position comprises:

[0038] pouring sealing connection agent at the gap position until the sealing connection agent fills the gap between the slotted position and the temperature sensor and the gap between the end face of the body segment and the end face of the lip segment, wherein the sealing connection agent comprises polyurethane liquid;

[0039] placing for a preset time until the poured polyurethane liquid solidifies.

[0040] The present application provides a temperature monitoring method for a shield machine main drive sealing structure, which is used to monitor the temperature at any position on the sealing member body, and comprises the following steps:

[0041] obtaining the temperature variation gradient at different positions of the sealing member body;

[0042] obtaining the temperature difference between any position of the sealing member body and the position of the temperature sensor on the sealing member body according to the temperature variation gradient;

[0043] collecting the actual temperature value at the lip position or the position close to the lip position of the sealing member body by the temperature sensor;

[0044] obtaining the actual temperature value at any position of the sealing member body according to the temperature difference and the actual temperature value collected by the temperature sensor.

[0045] According to the above, the shield machine main drive sealing structure, the manufacturing method and the temperature monitoring method of the present application have the following characteristics and advantages:

[0046] The temperature sensor is embedded in the sealing member body for sealing the shield machine main drive and close to the lip position. In the actual working process, the temperature value at the lip position or the position close to the lip position of the sealing member body can be collected by the temperature sensor, so that the temperature variation at the lip position or the position close to the lip position of the sealing member body of the shield machine main drive can be monitored, which has higher measurement accuracy and is more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0047] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0048] in:

[0049] Figure 1 : This is a schematic diagram of the main drive sealing structure of the tunnel boring machine of the present invention.

[0050] Figure 2 This is a schematic diagram of the lip section in the main drive sealing structure of the tunnel boring machine of the present invention.

[0051] Figure 3 This is a schematic diagram of the body section and lip section in the main drive sealing structure of the tunnel boring machine of the present invention.

[0052] Figure 4 This is a flowchart illustrating the manufacturing method of the main drive sealing structure for a tunnel boring machine according to the present invention.

[0053] Figure 5 This is a flowchart of the temperature monitoring method for the main drive sealing structure of the tunnel boring machine according to the present invention.

[0054] The reference numerals in the accompanying drawings of this invention are:

[0055] 1. Sealing element body; 101. Body section;

[0056] 102. Lip and mouth section; 2. Temperature sensor;

[0057] 3. Data acquisition device; 4. Display device;

[0058] 5. Data transmission line; 6. Positioning slot. Detailed Implementation

[0059] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0060] Implementation Method 1

[0061] like Figures 1 to 3 As shown, the present invention provides a shield machine main drive sealing structure, which includes: a sealing body 1 for sealing the shield machine main drive, the sealing body 1 having a lip (i.e., the end position of the sealing lip) that is in sealing contact with the drive shaft of the shield machine main drive in the assembled state; and at least one temperature sensor 2, the temperature sensor 2 being embedded in the sealing body 1 and located near the lip, the temperature sensor 2 being used to collect the temperature value at or near the lip position.

[0062] In the application, the temperature sensor 2 is embedded in the sealing body 1 near the lip, in the actual working process, the temperature value of the lip position or the position near the lip of the sealing body 1 of the shield machine main drive can be collected through the temperature sensor 2, so that the temperature change of the lip position or the position near the lip of the sealing body 1 of the shield machine main drive can be monitored, and the measurement accuracy is higher, and the measurement is more reliable.

[0063] In an optional embodiment of the application, as shown in Figure 2 The position near the lip in the sealing body 1 has a positioning groove 6, and the temperature sensor 2 is arranged in the positioning groove 6, and the data transmission line 5 connected to the temperature sensor 2 extends to the outside of the sealing body 1, and is used for transmitting the temperature information collected by the temperature sensor 2.

[0064] In an optional embodiment of the application, the sealing body 1 comprises a body segment 101 and a lip segment 102, a first recess is formed on one end surface of the body segment 101, and when the end surface of the body segment 101 is in abutment with the end surface of the lip segment 102, the first recess forms the above-mentioned positioning groove 6 for accommodating the temperature sensor 2. Figure 2 、 Figure 3 In another optional embodiment of the application, as shown in , A second recess is formed on one end surface of the lip segment 102, and when the end surface of the body segment 101 is in abutment with the end surface of the lip segment 102, the second recess forms the above-mentioned positioning groove 6 for accommodating the temperature sensor 2. In still another optional embodiment of the application, the first recess can be formed on one end surface of the body segment 101, and the second recess can be formed on one end surface of the lip segment 102, and when the end surface of the body segment 101 is in abutment with the end surface of the lip segment 102, the first recess and the second recess are in abutment to form the above-mentioned positioning groove 6 for accommodating the temperature sensor 2.

[0065] In the application, the sealing body 1 is divided into the body segment 101 and the lip segment 102, the temperature sensor 2 is embedded in the positioning groove 6, and the positioning groove 6 is poured and filled by the sealing filler, so that the temperature sensor 2 can be accurately positioned and installed, and the installation structure is simple and convenient to operate.

[0066] Further, the sealing filler is arranged at the gap position between the temperature sensor 2 and the positioning groove 6, and the sealing filler is formed by pouring and solidifying the polyurethane liquid at the gap position between the temperature sensor 2 and the positioning groove 6.

[0067] In the application, the sealing body 1 is made of polyurethane material, so as to ensure good sealing performance.

[0068] In an optional embodiment of the present application, the sealing body 1 is an annular structure arranged along the outer periphery of the driving shaft of the main drive of the shield tunneling machine, the number of temperature sensors 2 is multiple, and the multiple temperature sensors 2 are arranged at intervals along the circumference of the sealing body 1, so that the temperature values at different lip positions of the sealing body 1 can be respectively measured by the temperature sensors 2 at different positions.

[0069] In an optional embodiment of the present application, as shown in Figure 1 the sealing structure of the main drive of the shield tunneling machine further comprises a data acquisition device 3 and a display device 4, the temperature sensors 2 are connected to the data receiving end of the data acquisition device 3 through data transmission lines 5, and the data output end of the data acquisition device 3 is connected to the data receiving end of the display device 4 through data transmission lines 5. The data acquisition device 3 is used for receiving the data (collected temperature values) sent by the temperature sensors 2, and storing and displaying the data through the display device 4. Among them, the data acquisition device 3 can adopt but not limited to microcontroller, and can also adopt other data receiving and processing elements, which are not limited here.

[0070] The sealing structure of the main drive of the shield tunneling machine has the following characteristics and advantages:

[0071] I. The sealing structure of the main drive of the shield tunneling machine, the temperature sensor 2 is embedded in the sealing body 1 and close to the lip position, the temperature value of the lip position or the position close to the lip position of the sealing body 1 can be collected through the temperature sensor 2, so that the temperature change of the lip position or the position close to the lip position of the sealing body 1 of the main drive of the shield tunneling machine can be monitored, which has higher measurement accuracy and is more reliable.

[0072] II. The sealing structure of the main drive of the shield tunneling machine, the lip position of the sealing body 1 is segmented and provided with a positioning groove 6 on the end face, and the temperature sensor 2 is arranged in the positioning groove 6 and poured and filled with polyurethane, so that the temperature sensor 2 can be accurately positioned and installed, and the installation structure is simple and convenient to operate.

[0073] Embodiment two

[0074] As shown in Figure 4 the present application provides a manufacturing method of the sealing structure of the main drive of the shield tunneling machine, which is used for manufacturing the above-mentioned sealing structure of the main drive of the shield tunneling machine, and the manufacturing method comprises the following steps:

[0075] Step S1': segmentally manufacturing the sealing body 1, wherein the sealing body 1 at least comprises a body segment 101 and a lip segment 102, and the body segment 101 and the lip segment 102 respectively have matching end faces;

[0076] Step S2': positioning and slotting on the end face of the body section 101, or on the end face of the lip section 102, or on the end face of the body section 101 and the end face of the lip section 102 respectively;

[0077] Step S3': placing the temperature sensor 2 at the slotting position and temporarily fixing it, and leading the data transmission line 5 connected with the temperature sensor 2 out to the outside of the seal body 1;

[0078] Step S4': aligning the end face of the body section 101 with the end face of the lip section 102, and reserving a gap therebetween;

[0079] Step S5': pouring a sealing adhesive at the gap position, and sealingly connecting the end face of the body section 101 with the end face of the lip section 102;

[0080] Step S6': sealingly connecting the end face of the body section 101 with the end face of the lip section 102 at different positions along the circumference of the seal body 1, and forming a whole-circle seal body 1;

[0081] Step S7': according to the number of temperature sensors 2, the above steps S2' to S6' can be repeated to assemble different temperature sensors 2, finally forming a whole-circle seal body 1, and connecting the data transmission line 5 with the data acquisition device 3 and the display device 4 located outside, so as to realize the collection, analysis and display of the temperature at multiple positions along the circumference of the seal body 1.

[0082] In an optional embodiment of the present application, step S1' comprises:

[0083] Step S11': mixing the polyurethane prepolymer with the chain extender;

[0084] Step S12': pouring the mixed solution into at least the first mold and the second mold respectively;

[0085] Step S13': molding and vulcanizing (under preset temperature and pressure conditions) the first mold and the second mold to vulcanize and form the body section 101 and the lip section 102, the body section 101 and the lip section 102 respectively having a section surface that can be matched and connected, which is the end face of the body section 101 and the end face of the lip section 102.

[0086] In an optional embodiment of the present application, in step S2', the groove can be positioned and formed only on the end face of the body section 101, and the groove position forms the positioning groove 6 described above; or the groove can be positioned and formed only on the end face of the lip section 102, and the groove position forms the positioning groove 6 described above; or the groove can be positioned and formed respectively on the end face of the body section 101 and the end face of the lip section 102, and the two groove positions on the body section 101 and the lip section 102 are in abutting fit to form the positioning groove 6 described above. The size of the groove can be set according to the size of the temperature sensor 2 and the size of the data transmission line 5, and the position of the groove can be accurately positioned according to the arrangement position of the temperature sensor 2 and the line arrangement position of the data transmission line 5, and the groove can be formed by manual tooling or laser cutting, and the shape of the groove is consistent with the temperature sensor 2 and the data transmission line 5 as much as possible.

[0087] Further, the inner contour of the groove position is larger than the outer contour of the temperature sensor 2, so that the temperature sensor 2 is completely placed in the groove position. Preferably, the inner contour of the groove position is larger than the outer contour of the temperature sensor 2 (i.e. the gap width between the inner contour of the groove position and the outer contour of the temperature sensor 2) is 0.5mm to 1.5mm. Preferably, the inner contour of the groove position is larger than the outer contour of the temperature sensor 2 by 1mm.

[0088] Further, the depth of the positioning groove 6 formed after the groove is formed is to ensure that the temperature sensor 2 can be completely accommodated in the positioning groove 6. The inner wall of the groove position (i.e. the inner wall of the positioning groove 6) is roughened to have a predetermined roughness. Through the processing of the size and the inner wall roughness of the positioning groove 6, in the subsequent sealing pouring process, the amount of glue and polyurethane liquid can be kept less, and the temperature sensor 2 can be stably fixed, and the position of the temperature sensor 2 in the positioning groove 6 can be ensured not to shift, and the position can be kept accurate.

[0089] In an optional embodiment of the present application, step S3' comprises:

[0090] The step of placing the temperature sensor 2 in the groove position and temporarily fixing it comprises:

[0091] Step S31': placing and keeping the end face of the body section 101 or the end face of the lip section 102 with the groove position upward and horizontal;

[0092] Step S32': applying glue on the bottom of the groove position;

[0093] Step S33': placing the temperature sensor 2 in the groove position, and the bottom of the temperature sensor 2 is in contact with the glue.

[0094] Specifically, the lip section 102 can be laid flat with the end face of the slotted side facing upwards, a uniform thickness of glue (about 0.5 mm thick) is first applied at the bottom center of the slotted position, before the glue solidifies, the temperature sensor 2 is placed in the slotted position, and the temperature sensor 2 is adjusted to the center using a convenient tool such as tweezers to hold, so that the bottom of the temperature sensor 2 can be in contact with the glue, while leaving a uniform gap on both sides, which can keep the position of the temperature sensor 2 fixed after the glue solidifies, and play a temporary positioning role. In the above process, the amount of glue must be strictly controlled to prevent the temperature sensor 2 from being completely wrapped in glue, which will make the heat at the lip position need to be transmitted through two media, polyurethane and solidified glue, to reach the temperature sensor 2, instead of being transmitted by a single uniform polyurethane medium, because the thermal conductivity coefficients of different media are different, the temperature value at the position of the temperature sensor 2 and the temperature gradient of other parts are not uniform, which will affect the accuracy of temperature detection. The same method is used to fix the data transmission line 5, and the other end of the data transmission line 5 extends to the outside of the sealing member body 1.

[0095] In an optional embodiment of the present application, in step S4', the end face of the body section 101 is aligned with the end face of the lip section 102, and a gap of 5 mm to 15 mm is reserved between the end face of the body section 101 and the end face of the lip section 102. Preferably, the gap between the end face of the body section 101 and the end face of the lip section 102 is 10 mm. The end face of the body section 101 and the end face of the lip section 102 are kept parallel, and if the gap between them is too large, the centering effect is poor and misalignment is easy to occur, and if the gap between them is too small, the connection strength at the joint is affected.

[0096] In an optional embodiment of the present application, step S5' includes:

[0097] Step S51': pouring a sealing connecting agent (which forms the sealing filler described above after solidification) from the gap position, until the sealing connecting agent fills the gap between the slotted position and the temperature sensor 2 and the gap between the end face of the body section 101 and the end face of the lip section 102, wherein the sealing connecting agent includes a polyurethane liquid;

[0098] Step S52': placing for a predetermined time until the poured polyurethane liquid solidifies.

[0099] The sealing structure formed by the manufacturing method of the shield machine main drive sealing structure can accurately embed the temperature sensor 2 in the sealing element body 1 close to the lip position, which can directly detect the temperature value of the lip or the position close to the lip on the sealing element body 1 in real time, and the actual temperature value collected can be combined with the temperature gradient change of the sealing element body 1 as a whole to obtain the actual temperature value of any position on the sealing element body 1. Compared with the existing indirect measurement method, the present application has the characteristics of more accurate, more intuitive, more reliable and more comprehensive temperature measurement value, and the sealing structure manufactured by the method has the advantages of simple processing, low cost and reliable performance. In terms of use, the original sealing system of the shield machine does not need to be changed, and has the advantages of strong adaptability, simple installation and simple operation.

[0100] Embodiment three

[0101] As Figure 5 shown, the present application provides a temperature monitoring method of a shield machine main drive sealing structure, which is used for monitoring the temperature of any position on the sealing element body 1, and the temperature monitoring method comprises the following steps:

[0102] Step S1": obtaining the temperature change gradient of different positions of the sealing element body 1;

[0103] Among them, step S1" includes:

[0104] Step S11": obtaining the heat conduction law of the sealing element body 1 made of polyurethane material by simulation analysis or test method;

[0105] Among them, the simulation analysis or test method can use the existing method, and the specific steps are not limited here.

[0106] Step S12": obtaining the temperature change gradient of different positions of the sealing element body 1 according to the heat conduction law of the sealing element body 1.

[0107] Step S2": obtaining the temperature difference value between any position of the sealing element body 1 and the temperature collected by the temperature sensor 2 on the sealing element body 1 according to the temperature change gradient;

[0108] Step S3": collecting the actual temperature value of the lip position or the position close to the lip on the sealing element body 1 by the temperature sensor 2;

[0109] Step S4": obtaining the actual temperature value of any position of the sealing element body 1 according to the temperature difference value and the actual temperature value collected by the temperature sensor 2.

[0110] Further, after step S4", the actual average temperature value, the actual maximum temperature value and the actual minimum temperature value of the sealing body 1 can be obtained according to the actual temperature value at any position of the sealing body 1. Specifically, since the temperature variation gradient at different positions of the sealing body 1 is known, the position with the highest temperature in the temperature variation gradient can be found, and thus the temperature difference between the position with the highest temperature and the temperature sensor 2 can be obtained. According to the temperature difference and the actual temperature value collected by the temperature sensor 2, the actual maximum temperature value on the sealing body 1 can be obtained. Similarly, the actual minimum temperature value on the sealing body 1 can be obtained. Further, the actual temperature values at as many positions on the sealing body 1 as possible are obtained in the same way, and the actual average temperature value of the sealing body 1 is obtained by averaging the actual temperature values at different positions on the sealing body 1.

[0111] Specifically, when the sealing structure of the present application is working, the temperature at the lip position of the sealing body 1 continuously changes as the lip position continuously rubs against the contact surface of the driving shaft of the main drive of the shield machine. The temperature sensor 2 collects the real-time temperature value, and transmits the collected temperature value to the data acquisition device 3 through the data transmission line 5. The data acquisition device 3 stores, processes and analyzes the data, eliminates the noise signals, obtains accurate temperature data, and then transmits the temperature data to the display device 4 through the data transmission line 5 for display.

[0112] In order to further accurately display the temperature at any position on the sealing body 1, the temperature conduction rule of the sealing body 1 made of polyurethane material can be obtained by simulation analysis or experimental testing, the temperature gradient at different positions on the sealing body 1 is obtained, and the temperature difference between a certain position on the sealing body 1 and the position of the temperature sensor 2 is obtained. Thus, the actual temperature value at any position on the sealing body 1 can be accurately calculated according to the actual temperature value collected by the temperature sensor 2 and the temperature difference, and the actual temperature value at any position can be displayed on the display interface of the display device 4.

[0113] The above description is only a specific embodiment of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of the present application.

Claims

1. A method of temperature monitoring of a main drive seal structure of a tunneling machine, characterized by, The shield machine main drive sealing structure comprises: A sealing body (1) for sealing the shield machine main drive, the sealing body (1) having a lip in sealing contact with a drive shaft of the shield machine main drive in an assembled state, the sealing body (1) having a positioning groove (6) at a position close to the lip inside the sealing body (1); At least one temperature sensor (2) embedded at a position close to the lip inside the sealing body (1), the temperature sensor (2) being used to collect a temperature value at the position of the lip or close to the position of the lip; The sealing body (1) comprises a body section (101) and a lip section (102), a first recess being formed on an end face of the body section (101), and / or a second recess being formed on an end face of the lip section (102), the first recess or the second recess or the first recess and the second recess cooperating to form the positioning groove (6) in a butt joint state of the end face of the body section (101) and the end face of the lip section (102); A temperature monitoring method for the shield machine main drive sealing structure is used to monitor the temperature at any position of the sealing body (1), the temperature monitoring method comprising the following steps: Obtaining a temperature variation gradient at different positions of the sealing body (1); According to the temperature variation gradient, obtaining a temperature difference value between any position of the sealing body (1) and the position of the temperature sensor (2) on the sealing body (1); Collecting an actual temperature value at the position of the lip or close to the position of the lip on the sealing body (1) by the temperature sensor (2); According to the temperature difference value and the actual temperature value collected by the temperature sensor (2), obtaining an actual temperature value at any position of the sealing body (1); According to the actual temperature value at any position of the sealing body (1), obtaining an actual average temperature value, an actual maximum temperature value and an actual minimum temperature value of the sealing body (1).

2. The method of claim 1, wherein the temperature of the shield machine main drive sealing structure is monitored by a temperature sensor. The temperature sensor (2) is arranged in the positioning groove (6), and a data transmission line (5) is connected to the temperature sensor (2), the data transmission line (5) extending to the outside of the sealing body (1).

3. The method of claim 2, wherein the temperature of the shield machine main drive sealing structure is monitored by a temperature sensor. A sealing filler is arranged at a gap position between the temperature sensor (2) and the positioning groove (6).

4. The method of claim 3, wherein the temperature of the shield machine main drive sealing structure is monitored by a temperature sensor. The sealing filler is formed by pouring polyurethane liquid and solidifying at the gap position between the temperature sensor (2) and the positioning groove (6).

5. The method of claim 1, wherein, The sealing body (1) is made of polyurethane material.

6. The method of temperature monitoring of a shield machine main drive seal structure according to any one of claims 1 to 5, characterized in that, The sealing body (1) is an annular structure arranged along the outer periphery of the drive shaft of the shield machine main drive, and the number of the temperature sensors (2) is multiple, and the multiple temperature sensors (2) are arranged at intervals along the circumference of the sealing body (1).

7. The method of temperature monitoring of a shield machine main drive seal structure according to any one of claims 2 to 4, characterized in that, The shield machine main drive sealing structure further comprises a data acquisition device (3) and a display device (4), the temperature sensor (2) is connected with the data receiving end of the data acquisition device (3) through the data transmission line (5), and the data output end of the data acquisition device (3) is connected with the data receiving end of the display device (4) through the data transmission line (5).

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