Sealing Structure and Main Drive of Shield Machine

Abstract

The present invention relates to a sealing structure and a main drive of a shield machine. The sealing structure includes: a sealing body, which is used for being hermetically arranged in the gap between a first structural member and a second structural member, and the sealing body is deformed under pressure between the first structural member and the second structural member; at least one first force detection element, which is used for detecting the stress of the sealing body in the horizontal direction; at least one second force detection element, which is used for detecting the stress of the sealing body in the vertical direction; the first force detection element and the second force detection element are respectively arranged on the sealing body. If the detection value of the first force detection element is less than or equal to a first preset threshold value, and / or the detection value of the second force detection element is less than or equal to a second preset threshold value, the sealing structure fails. The present invention can provide real-time monitoring and early warning capabilities on the basis of improving the sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing, and particularly to a sealing structure and a main drive of a shield machine. Background Art

[0002] Sealing structures (such as sealing rings) are used in various fields such as machine tools, shipbuilding engineering, the automotive industry, aerospace, various machinery, instruments, and others. They are mainly used to seal the gaps between components. Taking the commonly used "O"-ring as an example, due to factors such as small interference amount, poor machining dimensional accuracy, fast compression permanent deformation, and rapid attenuation of contact stress of the "O"-ring, the "O"-ring fails to play a sealing role in a short time, affecting the use of equipment and even causing huge economic losses.

[0003] At present, an "O"-ring is used to seal between the wear-resistant steel belt and the support ring of the main drive of a roadheader. During the use of the roadheader, due to complex working conditions, impurities such as sand, gravel, mud, and water are likely to enter the sealing cavity of the main drive, resulting in significant wear of the sealing runway. In the later stage, the maintenance cost of the sealing runway is high and the construction period is long. To reduce the wear of the sealing runway, the current measure is to install a wear-resistant steel belt on the support ring. However, due to the insufficient roundness at the welding joint of the wear-resistant steel belt, it cannot fit tightly with the support ring, resulting in poor sealing of the main drive and oil leakage. At the same time, due to the obvious thermal expansion and contraction of the wear-resistant steel belt, during the tunneling process, heat is generated by the friction between the seal and the wear-resistant steel belt, causing the volume of the wear-resistant steel belt to expand, resulting in a gap between the wear-resistant steel belt and the support ring, causing oil leakage, making it difficult to build pressure for the main drive seal, and making it difficult for the grease to be extruded normally, and it is difficult to prevent foreign objects from entering the slurry chamber.

[0004] At present, for the problem of grease leakage between the wear-resistant steel belt and the support ring of a roadheader, only an "O"-ring can be installed between the wear-resistant steel belt and the support ring and sealant can be coated to fill the gap between them to prevent grease leakage. However, due to reasons such as the small interference amount of the "O"-ring and the poor performance of the sealant, the oil leakage problem has not been completely solved.

[0005] Therefore, based on years of experience and practice in the relevant industry, the inventor of the present invention proposes a sealing structure and a main drive of a shield machine to overcome the defects of the prior art. Summary of the Invention

[0006] The purpose of the present invention is to provide a sealing structure and a main drive of a shield machine, which can not only improve the sealing performance, but also provide real-time monitoring and early warning capabilities to avoid the occurrence of seal failure.

[0007] The purpose of the present invention can be achieved by the following solutions:

[0008] The present invention provides a sealing structure for sealing the gap between a first structural member and a second structural member, and the sealing structure includes;

[0009] A sealing main body, which is used for being hermetically arranged in the gap between the first structural member and the second structural member, and the sealing main body is deformed under pressure between the first structural member and the second structural member;

[0010] At least one first force detection element, which is used for detecting the stress of the sealing main body in the horizontal direction;

[0011] At least one second force detection element, which is used for detecting the stress of the sealing main body in the vertical direction;

[0012] The first force detection element and the second force detection element are respectively arranged on the sealing main body. If the detection value of the first force detection element is less than or equal to a first preset threshold, or the detection value of the second force detection element is less than or equal to a second preset threshold, then the sealing structure fails.

[0013] In a preferred embodiment of the present invention, the sealing main body has opposite first and second ends, and the first and second ends are respectively pressed against the first structural member and the second structural member;

[0014] The first and second ends are respectively formed with a first recess and a second recess for enhancing the deformation ability of the sealing main body.

[0015] In a preferred embodiment of the present invention, at least one first support member for enhancing the strength of the sealing main body is arranged inside the sealing main body. The middle part of the first support member is located at the middle position inside the sealing main body, and both ends of the first support member respectively extend to the first end and are located at the raised parts on both sides of the first recess, and / or both ends of the first support member respectively extend to the second end and are located at the raised parts on both sides of the second recess.

[0016] In a preferred embodiment of the present invention, the first support member includes at least two first support parts. One ends of the two first support parts are connected to form the middle part of the first support member, and the other ends of the two first support parts are respectively the two ends of the first support member. The first force detection element is arranged between the two first support parts;

[0017] The sealing main body is squeezed and deformed by the first structural member and the second structural member, so that the first support member is deformed under pressure, and the first force detection element collects the stress received by the first support member.

[0018] In a preferred embodiment of the present invention, the second force detection element is disposed on the first end.

[0019] In a preferred embodiment of the present invention, the second force detection element covers the first recess and the protruding portions on both sides of the first recess.

[0020] In a preferred embodiment of the present invention, an adhesive layer is provided between the second force detection element and the first end.

[0021] In a preferred embodiment of the present invention, a second support member for enhancing the support capacity of the sealing body is provided on the second end, and the second support member abuts against the second structural member.

[0022] In a preferred embodiment of the present invention, the second support member is located in the second recess, the middle of the second support member is connected to the second end, and both ends of the second support member respectively abut against the second structural member; a distance measuring element is provided on the second support member.

[0023] In a preferred embodiment of the present invention, the second support member includes at least two second support portions, one ends of the two second support portions are connected to form the middle of the second support member, and the other ends of the two second support portions are respectively the two ends of the second support member, and the distance measuring element is disposed between the two second support portions;

[0024] The sealing body is deformed by being squeezed by the first structural member and the second structural member, and the distance measuring element collects the distance between the position of the second recess on the second end and the second structural member.

[0025] In a preferred embodiment of the present invention, a third recess and a fourth recess for enhancing the deformation capacity of the sealing body are respectively formed on the left side and the right side of the sealing body.

[0026] In a preferred embodiment of the present invention, the first recess and the second recess are respectively located at the middle positions of the first end and the second end, and the third recess and the fourth recess are respectively located at the middle positions of the left side and the right side of the sealing body.

[0027] In a preferred embodiment of the present invention, the sealing body has an annular structure.

[0028] The present invention provides a main drive of a shield machine, which includes a wear-resistant steel belt, a support ring and the above-mentioned sealing structure. The wear-resistant steel belt is annularly disposed on the outer periphery of the support ring, and the sealing structure is sealingly disposed between the wear-resistant steel belt and the support ring.

[0029] In a preferred embodiment of the present invention, a receiving groove is formed between the wear-resistant steel belt and the support ring, and the sealing structure is disposed in the receiving groove.

[0030] In a preferred embodiment of the present invention, the number of the sealing structures is multiple, and each of the sealing structures is arranged at intervals along the axial direction of the main drive of the shield machine.

[0031] As described above, the characteristics and advantages of the sealing structure and the main drive of the shield machine of the present invention are: a first force detection element and a second force detection element are respectively arranged on the sealing body. The first force detection element is used to detect the stress of the sealing body in the horizontal direction, and the second force detection element is used to detect the stress of the sealing body in the vertical direction. If the detection value of the first force detection element is less than or equal to the first preset threshold, and / or the detection value of the second force detection element is less than or equal to the second preset threshold, it can be known that the attenuation degree of the stress and strain values of the sealing body in the vertical and / or horizontal directions can no longer achieve the effect of sealing the first structural member and the second structural member, and it can be determined that the sealing structure has failed. Therefore, through the sealing structure of the present invention, not only the sealing performance can be improved, but also the real-time monitoring and early warning ability can be provided to avoid the occurrence of sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention.

[0033] Wherein:

[0034] Figure 1 : is a cross-sectional view of the sealing structure of the present invention in an uncompressed state.

[0035] Figure 2 : is a cross-sectional view of the sealing structure of the present invention in a compressed state.

[0036] Figure 3 : is a schematic diagram of the installation position of the sealing structure of the present invention I.

[0037] Figure 4 : is a schematic diagram of the installation position of the sealing structure of the present invention II.

[0038] The reference numerals in the present invention are:

[0039] 1, sealing body; 101, first end;

[0040] 102, second end; 103, first recess;

[0041] 104, second recess; 105, third recess;

[0042] 106, fourth recess; 2, first support member;

[0043] 201. First support part; 3. First force detection element;

[0044] 4. Second force detection element; 5. Adhesive layer;

[0045] 6. Second support; 601. Second support part;

[0046] 7. Distance measurement element; 100. Sealing structure;

[0047] 200. Wear-resistant steel strip; 300. Support ring;

[0048] 400. Accommodation groove. Detailed implementation manners

[0049] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0050] In the present invention, terms with directional indications such as vertical, horizontal, up, down, top, bottom, left, and right are all based on Figure 1 the vertical, horizontal, up, down, top, bottom, left, and right directions in

[0051] Embodiment 1

[0052] As shown in Figure 1 、 Figure 2 , the present invention provides a sealing structure for sealing the gap between a first structural member and a second structural member. The sealing structure includes a sealing main body 1, at least one first force detection element 3, and at least one second force detection element 4. The sealing main body 1 is used to be sealingly disposed in the gap between the first structural member and the second structural member, and the sealing main body 1 is deformed under pressure between the first structural member and the second structural member; the first force detection element 3 and the second force detection element 4 are respectively disposed on the sealing main body 1. The first force detection element 3 is used to detect the stress of the sealing main body 1 in the horizontal direction, and the second force detection element 4 is used to detect the stress of the sealing main body 1 in the vertical direction; if the detection value of the first force detection element 3 is less than or equal to a first preset threshold, and / or the detection value of the second force detection element 4 is less than or equal to a second preset threshold, then the sealing structure fails.

[0053] In the present invention, a first force detection element 3 and a second force detection element 4 are respectively arranged on the sealing body 1. The first force detection element 3 is used to detect the stress of the sealing body 1 in the horizontal direction, and the second force detection element 4 is used to detect the stress of the sealing body 1 in the vertical direction. If the detected value of the first force detection element 3 is less than or equal to the first preset threshold, and / or the detected value of the second force detection element 4 is less than or equal to the second preset threshold, it can be known that the attenuation degree of the stress and strain values of the sealing body 1 in the vertical and / or horizontal directions can no longer achieve the effect of sealing the first structural member and the second structural member, and it can be determined that the sealing structure has failed. Therefore, the sealing structure of the present invention can not only improve the sealing performance, but also provide the ability of real-time monitoring and early warning to avoid the occurrence of sealing failure. Among them, both the first preset threshold and the second preset threshold can be set according to the sealing requirements between the first structural member and the second structural member. At the sealing position, if the attenuation degree of the stress and strain values of the sealing body 1 in at least one of the vertical and horizontal directions reaches the preset threshold due to the long-term pressure on the sealing structure, it can be determined that the sealing structure has lost its sealing function and can no longer meet the sealing requirements for the first structural member and the second structural member.

[0054] In an alternative embodiment of the present invention, as Figure 1 、 Figure 2 shown, on the cross-section of the sealing body 1, the sealing body 1 has opposite first end 101 and second end 102. The first end 101 is pressed against the first structural member, and the second end 102 is pressed against the second structural member. A first recess 103 is formed on the first end 101, and a second recess 104 is formed on the second end 102. The first recess 103 and the second recess 104 can improve the deformation ability of the sealing body 1. When the sealing body 1 is pressed into the gap between the first structural member and the second structural member, a stable sealing effect can be ensured.

[0055] In an alternative embodiment of the present invention, as Figure 1 、 Figure 2As shown, at least one first support member 2 is provided inside the sealing body 1. The cross-section of the first support member 2 is in a "V" shape. The middle part of the first support member 2 is located at the middle position inside the sealing body 1 (i.e., the bottom pointed angle position of the "V" shape). The two ends of the first support member 2 (i.e., the two top ends of the "V" shape) respectively extend to the first end 101 and are located at the raised parts on both sides of the first recess 103, and / or the two ends of the first support member 2 respectively extend to the second end 102 and are located at the raised parts on both sides of the second recess 104. The first support member 2 supports the sealing body 1, improving the strength of the sealing body 1. When the sealing body 1 is under pressure, it can delay the permanent deformation caused by the long-term pressure on the sealing body 1 in the compression direction and reduce the attenuation rate of the contact stress, thereby increasing the service life of the sealing body 1. Of course, the first support member 2 can also be of other shapes as long as it can support the sealing body 1.

[0056] Specifically, as Figure 1 、 Figure 2 shown, the first support member 2 includes at least two first support parts 201. One ends of the two first support parts 201 are connected to form the middle part of the first support member 2, and the other ends of the two first support parts 201 are respectively the two ends of the first support member 2, so that the cross-section of the first support member 2 is in a "V" shape. The first force detection element 3 is arranged horizontally between the two first support parts 201, and the first force detection element 3 is located at the middle or lower part of the first support part 201. Since the sealing body 1 is squeezed and deformed by the first structural member and the second structural member, the first support member 2 is deformed under pressure. Thus, the strain and stress in the horizontal direction between the two first support parts 201 (i.e., the strain and stress of the sealing body 1 in the horizontal direction) can be monitored in real time through the first force detection element 3, and the sealing effect of the sealing structure can be obtained.

[0057] Furthermore, the first support member 2 can be made of an elastic metal plate, but is not limited thereto.

[0058] Furthermore, as Figure 1 、 Figure 2 shown, the second force detection element 4 is arranged on the first end 101, and the second force detection element 4 covers the first recess 103 and the raised parts on both sides of the first recess 103. When in the sealed position, the second force detection element 4 is in direct contact with the first structural member. Thus, the strain and stress of the sealing body 1 in the vertical direction can be monitored in real time through the second force detection element 4, and the sealing effect of the sealing structure can be obtained.

[0059] Furthermore, as Figure 1 、 Figure 2 shown, an adhesive layer 5 is provided between the second force detection element 4 and the first end 101, and the second force detection element 4 is fixed to the sealing body 1 through the adhesive layer 5.

[0060] Further, the first force detection element 3 and the second force detection element 4 may be, but are not limited to, stress strain gauges.

[0061] In an alternative embodiment of the present invention, as Figure 1 , Figure 2 shown, a second support member 6 is provided on the second end 102. When in the sealed position, the second support member 6 abuts against the second structural member, and the support ability of the sealing body 1 can be enhanced through the second support member 6.

[0062] Further, as Figure 1 , Figure 2 shown, the second support member 6 is located within the second recess 104. The cross-section of the second support member 6 is in an inverted "V" shape. The middle part of the second support member 6 (i.e., the top sharp corner position of the inverted "V" shape) is connected to the second end 102, and the two ends of the second support member 6 (i.e., the two bottom ends of the inverted "V" shape) respectively abut against the second structural member. The second support member 6 can increase the contact area between the sealing body 1 and the second structural member, thereby reducing the compressive strength of the contact surface and delaying the increasing rate of the compression permanent deformation amount, and improving the sealing effect between the second end 102 and the second structural member.

[0063] In an alternative embodiment of the present invention, as Figure 1 , Figure 2 shown, a distance measuring element 7 is provided on the second support member 6. Through the distance measuring element 7, the distance between the position of the second recess 104 on the second end 102 of the sealing body 1 and the second structural member can be detected in real time. When the detected distance value is greater than or equal to a preset distance threshold, it can be determined that the sealing requirement between the second end 102 of the sealing body 1 and the second structural member cannot be achieved, and the sealing body 1 has lost its sealing function. Among them, the distance threshold can be set according to the sealing requirement between the first structural member and the second structural member.

[0064] Further, the distance measuring element 7 may be, but is not limited to, a distance sensor.

[0065] Specifically, as Figure 1 , Figure 2 shown, the second support member 6 includes at least two second support portions 601. One ends of the two second support portions 601 are connected to form the middle part of the second support member 6, and the other ends of the two second support portions 601 are respectively the two ends of the second support member 6. The distance measuring element 7 is disposed between the two second support portions 601, so that the cross-section of the second support member 6 is in an inverted "V" shape; the sealing body 1 is deformed by being squeezed by the first structural member and the second structural member, and the distance measuring element 7 collects the distance between the position of the second recess 104 on the second end 102 and the second structural member.

[0066] In a specific embodiment of the present invention, Figure 1 、 Figure 2 As shown, a third recess 105 is formed on the left side of the sealing body 1 and a fourth recess 106 is formed on the right side of the sealing body 1. The cooperation between the third recess 105 and the fourth recess 106 can also enhance the deformation capability of the sealing body 1.

[0067] Specifically, the first recess 103 and the second recess 104 are respectively located in the middle of the first end 101 and the second end 102, and the third recess 105 and the fourth recess 106 are respectively located in the middle of the left and right sides of the sealing body 1, so that the cross section of the sealing body 1 is "X"-shaped.

[0068] In an optional embodiment of the present invention, the sealing body 1 is an annular structure. Figure 1 、 Figure 2 Only the cross-sectional structure of the sealing body 1 is shown.

[0069] The working principle of the sealing structure of the present invention is as follows: when the first end 101 and the second end 102 of the sealing body 1 contact the first structural member and the second structural member respectively, the second support member 6 will abut against the second structural member and measure the distance between the second end 102 and the second structural member in the current state. As the contact stress and contact time increase, the permanent compression deformation value of the material increases, and the distance value measured by the distance measuring element 7 gradually decreases. When the detected distance value reaches less than or equal to a preset distance threshold, an alarm is issued, indicating that the sealing body 1 has lost its sealing function. In addition, since the internal strain of the sealing body 1 is small but the contact stress is large, a second force detection element 4 can be set to detect the strain and contact stress values in the vertical direction on the contact surface between the sealing body 1 and the first structural member in real time. When the gap between the first structural member and the second structural member is too large due to long-term action, resulting in a small sealing strain, or the seal is under pressure for a long time, causing the vertical strain value of the seal to be large and the contact stress to be small, the detection value of the second force detection element 4 is less than or equal to the second preset threshold and an alarm is issued, indicating that the sealing body 1 has lost its sealing function; at the same time, the detection value of the second force detection element 4 is less than or equal to the second preset threshold and an alarm is issued, it can be known that the attenuation degree of the stress and strain values of the sealing body 1 in the horizontal direction can no longer achieve the effect of sealing the first structural member and the second structural member, indicating that the sealing body 1 has lost its sealing function.

[0070] The characteristics and advantages of the sealing structure of the present invention are:

[0071] 1. This sealing structure not only improves the sealing performance, but also provides real-time monitoring and early warning capabilities to avoid sealing failure.

[0072] Second, a first support member 2 is provided inside the sealing structure. The first support member 2 supports the sealing main body 1, enhancing the strength of the sealing main body 1. When the sealing main body 1 is under pressure, it can delay the permanent deformation of the sealing main body 1 caused by long-term pressure in the compression direction and reduce the attenuation rate of the contact stress, thereby improving the service life of the sealing main body 1.

[0073] Third, a second support member 6 is provided on the sealing structure. By means of the second support member 6, the contact area between the sealing main body 1 and the second structural member can be increased, thereby reducing the compressive strength of the contact surface, delaying the increasing rate of the compression permanent deformation amount, and improving the sealing effect between the second end 102 and the second structural member.

[0074] Fourth, in this sealing structure, a distance measuring element 7 is provided on the second support member 6. By detecting the distance value between the second end 102 of the sealing main body 1 and the second structural member, it can be known whether the sealing main body 1 has lost its sealing function.

[0075] Fifth, in this sealing structure, the stress of the sealing main body 1 in the horizontal direction is detected by the first force detection element 3, and the stress of the sealing main body 1 in the vertical direction is detected by the second force detection element 4, so as to know whether the sealing main body 1 has lost its sealing function.

[0076] Embodiment 2

[0077] As Figure 3 、 Figure 4 shown, the present invention provides a main drive of a shield machine. The main drive of the shield machine includes a wear-resistant steel belt 200, a support ring 300, and the above-mentioned sealing structure 100. The wear-resistant steel belt 200 is disposed around the outer periphery of the support ring 300, and the sealing structure 100 is sealingly disposed between the wear-resistant steel belt 200 and the support ring 300. Among them, the wear-resistant steel belt 200 is the first structural member in Embodiment 1, and the support ring 300 is the second structural member in Embodiment 1.

[0078] Furthermore, as Figure 3 、 Figure 4 shown, the number of the sealing structures 100 is multiple, and the sealing structures 100 are arranged at intervals along the axial direction of the main drive of the shield machine.

[0079] In an optional embodiment of the present invention, as Figure 3 、 Figure 4 shown, a plurality of accommodation grooves 400 are formed between the wear-resistant steel belt 200 and the support ring 300, and the plurality of sealing structures 100 are respectively disposed in the corresponding accommodation grooves 400.

[0080] In an alternative embodiment of the present invention, at least two alarm devices (not shown) are provided between the wear-resistant steel belt 200 and the support ring 300. The detection signal output terminals of the first force detection element 3, the second force detection element 4, and the distance measurement element 7 are respectively connected to the detection signal receiving terminal of the controller. The control signal output terminal of the controller is connected to the control terminal of the alarm device. When the detection value of any one of the first force detection element 3, the second force detection element 4, and the distance measurement element 7 exceeds a preset threshold, the controller will control the alarm device to give an alarm to remind the staff to repair or replace the sealing structure. Among them, the alarm device can be, but is not limited to, an audible and visual alarm.

[0081] In the present invention, a plurality of accommodation grooves 400 are provided at different positions between the wear-resistant steel belt and the support ring, and a sealing structure 100 is provided in each accommodation groove 400. A first support member 2 is embedded inside the sealing structure 100 and near the wear-resistant steel belt side to prevent the lip position of the sealing structure 100 from being compressed and permanently deformed greatly and the contact stress from decaying too fast due to long-term compression. A second support member 6 is provided at the position where the sealing structure 100 contacts the support ring, and a distance measurement element 7 is provided on the second support member 6. The second support member 6 can increase the contact area between the sealing structure 100 and the support ring, reduce the compression strength of the contact surface, delay the increasing rate of the compression permanent deformation value, and improve the sealing performance between the sealing structure 100 and the support ring. The distance measurement element 7 can detect the distance between the second end 102 of the sealing structure 100 and the support ring. When the detected distance value decreases to a preset distance threshold, the alarm device gives an alarm, indicating that the sealing structure 100 has lost its sealing function. A second force detection element 4 is provided on the contact surface between the sealing structure 100 and the wear-resistant steel belt, and its main function is to monitor the strain and contact stress in the vertical direction between the sealing structure 100 and the wear-resistant steel belt in real time. When the detection value of the second force detection element 4 reaches a first preset threshold, the alarm device gives an alarm, indicating that the sealing structure 100 has lost its sealing function. At the same time, a first force detection element 3 is provided on the first support member 2 to detect the strain and stress values of the sealing structure 100 in the horizontal direction in real time. When the detection value of the first force detection element 3 reaches a second preset threshold, the alarm device gives an alarm, indicating that the sealing structure 100 has lost its sealing function. As long as any one of the above three thresholds is reached, the sealing structure 100 can be judged to have lost its sealing function. The sealing structures 100 provided in other accommodation grooves 400 have the same working principle of sealing monitoring and early warning. The setting of the sealing structure 100 not only solves the problem of the sealing cooperation between the wear-resistant steel belt and the support ring during the operation of the main drive of the shield machine and the failure of the sealing structure 100, but also can realize the real-time monitoring and early warning ability of the sealing state on the basis of ensuring the sealing performance.

[0082] The characteristics and advantages of the main drive of the shield machine of the present invention are as follows:

[0083] The main drive of the shield machine can improve the sealing performance between the wear-resistant steel belt and the support ring and has the ability of sealing performance monitoring and early warning. The sealing structure 100 in the main drive of the shield machine has a large interference amount in the assembled state, which can make the contact stress between the sealing structure 100 and the contact surfaces of the wear-resistant steel belt and the support ring larger, the strain smaller, and the sealing performance better. At the same time, the first support member 2 arranged inside can make the sealing structure 100 have better support, solving the problems of large strain and rapid attenuation of contact stress of the sealing structure under long-term pressure. In addition, the first force detection element 3 and the second force detection element 4 can respectively monitor the strain values and stress values of the sealing structure 100 in the vertical direction and the horizontal direction in real time and give early warnings, not only effectively solving the problem of the failure of the sealing structure in the clearance fit of components during the use of the equipment, but also improving the sealing performance and realizing the ability of sealing monitoring and early warning.

[0084] The above are only the schematic specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A sealing structure for sealing the gap between a first structural member and a second structural member, characterized in that, The sealing structure includes; a sealing body, which is used to be hermetically arranged in the gap between the first structural member and the second structural member, and the sealing body is deformed under pressure between the first structural member and the second structural member; at least one first force detection element, which is used to detect the stress of the sealing body in the horizontal direction; at least one second force detection element, which is used to detect the stress of the sealing body in the vertical direction; the first force detection element and the second force detection element are respectively arranged on the sealing body. If the detection value of the first force detection element is less than or equal to a first preset threshold, and / or the detection value of the second force detection element is less than or equal to a second preset threshold, then the sealing structure fails; the sealing body has opposite first and second ends, and the first and second ends are respectively pressed against the first structural member and the second structural member; the first and second ends are respectively formed with a first recess and a second recess for enhancing the deformation ability of the sealing body; at least one first support member for enhancing the strength of the sealing body is arranged inside the sealing body. The middle part of the first support member is located at the middle position inside the sealing body, and the two ends of the first support member respectively extend to the first end and are located at the protruding parts on both sides of the first recess, or the two ends of the first support member respectively extend to the second end and are located at the protruding parts on both sides of the second recess.

2. The sealing structure according to claim 1, wherein, the first support member includes at least two first support parts. One ends of the two first support parts are connected to form the middle part of the first support member, and the other ends of the two first support parts are respectively the two ends of the first support member. The first force detection element is arranged between the two first support parts; the sealing body is extruded and deformed by the first structural member and the second structural member, so that the first support member is deformed under pressure, and the first force detection element collects the stress received by the first support member.

3. The sealing structure according to claim 1, characterized in that, the second force detection element is arranged on the first end.

4. The sealing structure according to claim 3, characterized in that the second force detection element covers the first recess and the protruding parts on both sides of the first recess.

5. The sealing structure according to claim 3 or 4, characterized in that, an adhesive layer is arranged between the second force detection element and the first end.

6. The sealing structure according to claim 1, characterized in that, a second support member for enhancing the support ability of the sealing body is arranged on the second end, and the second support member abuts against the second structural member.

7. The sealing structure according to claim 6, wherein, the second support member is located in the second recess. The middle part of the second support member is connected to the second end, and the two ends of the second support member respectively abut against the second structural member; a ranging element is arranged on the second support member.

8. The sealing structure according to claim 7, wherein, the second support member includes at least two second support parts. One ends of the two second support parts are connected to form the middle part of the second support member, and the other ends of the two second support parts are respectively the two ends of the second support member. The ranging element is arranged between the two second support parts; the sealing body is extruded and deformed by the first structural member and the second structural member, and the ranging element collects the distance between the position of the second recess on the second end and the second structural member.

9. The sealing structure according to claim 1, characterized in that, On the left and right sides of the sealing body, a third concave portion and a fourth concave portion for enhancing the deformation ability of the sealing body are respectively formed.

10. The sealing structure according to claim 9, wherein, The first concave portion and the second concave portion are respectively located at the intermediate positions of the first end and the second end, and the third concave portion and the fourth concave portion are respectively located at the intermediate positions of the left and right sides of the sealing body.

11. The sealing structure according to claim 10, characterized in that, The sealing body has an annular structure.

12. A main drive of a shield machine, characterized in that, The main drive of the shield machine includes a wear-resistant steel belt, a support ring, and the sealing structure according to any one of claims 1 to 11. The wear-resistant steel belt is disposed around the outer periphery of the support ring, and the sealing structure is sealingly arranged between the wear-resistant steel belt and the support ring.

13. The main drive of the shield machine according to claim 12, characterized in that, A receiving groove is formed between the wear-resistant steel belt and the support ring, and the sealing structure is disposed in the receiving groove.

14. The main drive of the shield machine according to claim 12, characterized in that, The number of the sealing structures is multiple, and the sealing structures are arranged at intervals along the axial direction of the main drive of the shield machine.

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