Heading machine main drive sealing system and heading machine

Abstract

The invention relates to the technical field of sealing, and provides a heading machine main drive sealing system and a heading machine, the heading machine main drive sealing system comprises a sealing cavity assembly arranged between a shield body unit and a driving disc unit of the heading machine, and the sealing cavity assembly is provided with an inner ring piece and an outer ring piece which are connected in a sleeved mode; an annular sealing cavity is formed between the inner ring piece and the outer ring piece; the flexible connecting piece is arranged between the sealing cavity assembly and the shield body unit or the driving disc unit, and the flexible connecting piece is used for absorbing jumping displacement of the driving disc unit; and the rotary supporting piece is arranged on the shield body unit or the driving disc unit, and the inner ring piece and the outer ring piece are connected with the rotary supporting piece in a relative rotation mode so as to reduce the radial run-out of the annular sealing cavity in the relative rotation state of the inner ring piece and the outer ring piece. The invention can solve the problem of abnormal wear and leakage caused by overlarge jumping of the main drive sealing cavity of the existing heading machine.

Description

Technical Field

[0001] The invention relates to the technical field of sealing, and in particular to a main drive sealing system of a tunnel boring machine and a tunnel boring machine capable of reducing the vibration of a sealing cavity. Background Art

[0002] The main drive seal is a key core component of the tunnel boring machine. Once the main drive seal structure fails, it is very likely to cause damage to other key components of the tunnel boring machine's main drive, resulting in long-term shutdown and maintenance of the entire tunnel boring machine or even scrapping. In addition, it is difficult to replace the seal in the tunnel, and it is extremely difficult and costly to repair or replace the main bearing, which will cause safety hazards and economic losses to the entire tunnel project.

[0003] At present, the main drive seal of the tunnel boring machine mainly adopts lip seal, VD seal or multi-finger polyurethane + VD seal, which is installed on the grease ring and cooperates with the sealing runway to form a sealed main drive system. As the diameter of the tunnel boring machine increases, the processing error of the parts increases, and the cutter head is affected by the overturning force during the construction process. The vibration increases, resulting in a large vibration of the main drive seal chamber, which will accelerate the wear of the seal and increase the risk of leakage. Therefore, it is necessary to design a sealing structure that can improve the stability of the sealing chamber. Summary of the invention

[0004] The purpose of the present invention is to provide a main drive sealing system and a tunneling machine, so as to solve the problem that the main drive sealing chamber of the existing tunneling machine has excessive vibration, resulting in abnormal wear and leakage.

[0005] The above technical objectives of the present invention are mainly achieved through the following technical solutions:

[0006] In one aspect, the present invention provides a main drive sealing system for a roadheader, comprising:

[0007] A sealed cavity assembly is provided between the shield unit and the drive disc unit of the tunnel boring machine, wherein the sealed cavity assembly comprises an inner ring member and an outer ring member which are connected to each other, and an annular sealed cavity is formed between the inner ring member and the outer ring member;

[0008] A flexible connector, provided between the sealed cavity assembly and the shield unit or the drive disk unit, the flexible connector being used to absorb the bouncing displacement of the drive disk unit;

[0009] The slewing support is arranged on the shield unit or the drive disk unit, and the inner ring member and the outer ring member are connected to the slewing support so as to be relatively rotatable, so as to reduce the radial runout of the annular sealing chamber when the inner ring member and the outer ring member are relatively rotating.

[0010] In a preferred embodiment of the present invention, the swivel support member includes an inner support ring and an outer support ring sleeved on the outer circumference of the inner support ring, the outer support ring and the inner support ring are coaxial and rotatable, one end of the inner ring member is connected to the inner support ring, and one end of the outer ring member is connected to the outer support ring.

[0011] In a preferred embodiment of the present invention, the flexible connecting member is connected between the inner ring member and the driving disk unit, and the outer supporting ring is connected to the shield unit.

[0012] In a preferred embodiment of the present invention, the flexible connecting member is connected between the outer ring member and the shield unit, and the inner supporting ring is connected to the driving disk unit.

[0013] In a preferred embodiment of the present invention, the flexible connecting member is an elastic tube made of elastic material, and the elastic tube is clamped between the inner ring member and the drive disk unit; or, the elastic tube is clamped between the outer ring member and the shield unit.

[0014] In a preferred embodiment of the present invention, the flexible connecting member is an elastic ring made of elastic material, the outer edge of the elastic ring is connected to the end face of the inner ring member via a fixing member, and the inner edge of the elastic ring is connected to the end face of the drive disk unit via a fixing member; or the inner edge of the elastic ring is connected to the end face of the outer ring member via a fixing member, and the outer edge of the elastic ring is connected to the end face of the shield unit via a fixing member.

[0015] In a preferred embodiment of the present invention, the slewing support member is a rolling bearing or a sliding bearing, and the rolling bearing or the sliding bearing is arranged at one end of the sealing chamber assembly, and one end of the inner ring of the bearing is connected to the inner ring member, and one end of the outer ring of the bearing is connected to the outer ring member.

[0016] In a preferred embodiment of the present invention, the flexible connector is connected between the sealed chamber assembly and the drive disk unit, and the other end of the outer ring of the bearing is connected to the end face of the shield unit.

[0017] In a preferred embodiment of the present invention, the flexible connector is connected between the sealing chamber assembly and the shield unit, and the inner ring of the bearing is sleeved on the drive disk unit.

[0018] On the other hand, the present invention also provides a roadheader, comprising:

[0019] Shield unit;

[0020] A drive disk unit is rotatably disposed in the shield unit via a bearing;

[0021] As described above, the main drive sealing system of the tunnel boring machine is arranged between the shield unit and the drive disc unit.

[0022] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0023] The present invention utilizes a slewing support to directly assemble an inner ring member and an outer ring member in a sealing chamber assembly. The vibration of the annular sealing chamber is no longer affected by other assembly relationships, but is directly determined by the vibration of the slewing support. The precision of the slewing support is utilized to ensure the stability of the vibration of the annular sealing chamber when the equipment is running. At the same time, a flexible connecting member is added between the sealing chamber assembly and the drive disk unit or the shield unit to isolate the influence of the vibration of the drive disk unit on the annular sealing chamber. The vibration of the drive disk caused by the force on the cutter disk in the drive disk unit is absorbed by the flexible connecting member and is no longer transmitted to the annular sealing chamber, thereby achieving the stability of the vibration of the annular sealing chamber.

[0024] As described above, the technical solution described in the present invention can solve the problem of excessive vibration of the main drive seal chamber, reduce abnormal wear and damage of the main drive seal, improve the reliability of the main drive system of the tunnel boring machine, reduce the cost of maintenance and replacement of the main drive seal system, and reduce engineering losses caused by oil leakage and downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0027] Figure 1 It is a schematic diagram of the structure of the main drive lip seal of the tunnel boring machine in the prior art;

[0028] Figure 2 It is a structural schematic diagram of a first embodiment of the main drive sealing system of a tunnel boring machine according to the present invention;

[0029] Figure 3It is a structural schematic diagram of a second embodiment of the main drive sealing system of a tunnel boring machine according to the present invention;

[0030] Figure 4 for Figure 2 Schematic diagram of the assembly structure of the structure shown.

[0031] Description of reference numerals:

[0032] 10. Shield; 11. Driving disc; 12. Cutter disc; 13. Main bearing fixed ring; 14. Main bearing moving ring;

[0033] 20. Inner ring; 21. Outer ring; 22. Annular sealing chamber; 23. Lip seal;

[0034] 30. Flexible connector;

[0035] 40. Rotary support; 41. Inner support ring; 42. Outer support ring. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] like Figure 1As shown, in the prior art, an inner ring 20 (sealing track) forming the main driving sealing structure is assembled on the driving disk 11, an outer ring 21 (grease ring) forming the main driving sealing structure is assembled on the shield body 10, and a lip seal 23 is provided in the annular sealing cavity 22 formed between the outer ring 21 and the inner ring 20. On the one hand, since the shield body 10 and the drive disc 11 of the tunnel boring machine are usually composed of multiple components, affected by the processing accuracy and assembly errors of each component, the annular sealing cavity 22 formed between the inner ring 20 and the outer ring 21 is usually not a regular circular ring (that is, the coaxiality between the inner ring 20 and the outer ring 21 cannot be effectively guaranteed), which leads to the annular sealing cavity 22 jumping during the relative rotation of the inner ring 20 and the outer ring 21 (the thickness of the annular sealing cavity 22 in a certain radial direction keeps changing); on the other hand, since the inner ring 20 is directly assembled on the shield body 10, and the cutter disc 12 is connected to the shield body 10, during the tunneling process, the jumping of the drive disc 11 caused by the force on the cutter disc 12 will cause the annular sealing cavity 22 to jump.

[0040] The vibration of the annular sealing chamber 22 will affect the service life of the sealing ring in the annular sealing chamber 22. The present invention provides a main drive sealing system for a roadheader that can significantly reduce the vibration of the annular sealing chamber 22. The details are as follows:

[0041] Implementation method 1:

[0042] like Figure 2 and Figure 4 As shown, the present invention provides a main drive sealing system for a tunnel boring machine, which includes a sealing chamber assembly, a flexible connector 30 and a slewing support 40. The sealing chamber assembly is arranged between the shield unit and the drive disk unit of the tunnel boring machine, and the sealing chamber assembly has an inner ring 20 and an outer ring 21 which are connected to each other, and an annular sealing chamber 22 is formed between the inner ring 20 and the outer ring 21; the flexible connector 30 is arranged between the sealing chamber assembly and the drive disk unit, and the flexible connector 30 is used to absorb the jumping displacement of the drive disk unit; the slewing support 40 is arranged on the shield unit, and the inner ring 20 and the outer ring 21 can be relatively rotatably connected to the slewing support 40, so as to reduce the radial jumping of the annular sealing chamber 22 when the inner ring 20 and the outer ring 21 are relatively rotating, and keep the shape of the annular sealing chamber 22 basically unchanged.

[0043] A flexible connector 30 is added between the sealing chamber assembly and the drive disc unit to isolate the impact of the vibration of the drive disc unit on the annular sealing chamber 22. The vibration of the drive disc 11 caused by the force applied to the blade disc 12 in the drive disc unit is absorbed by the flexible connector 30 and is no longer transmitted to the annular sealing chamber 22, thereby achieving the stability of the vibration of the annular sealing chamber 22.

[0044] A swivel support 40 is added between the sealing chamber assembly and the shield unit. The inner ring 20 and the outer ring 21 in the sealing chamber assembly are directly assembled on the swivel support 40. The vibration of the annular sealing chamber 22 is no longer affected by other assembly relationships, but is directly determined by the vibration of the swivel support 40. The precision of the swivel support 40 is used to ensure the stability of the vibration of the annular sealing chamber 22 when the equipment is running.

[0045] The specific structure of each part of the main drive sealing system of the tunnel boring machine in this embodiment, as well as the position and connection relationship between the parts will be described in detail below.

[0046] First, the shield unit and drive disc unit on the tunnel boring machine are briefly described. Figures 2 to 4 As shown, the shield unit is a shell arranged on the outer side of the tunneling head in the circumferential direction, which is usually composed of a plurality of annular components. The shield unit at least includes a shield body 10; the drive disc unit is arranged in the shield unit, which at least includes an axially connected drive disc 11 and a cutter disc 12. A main drive bearing is arranged between the drive disc unit and the shield unit, and the main drive bearing includes a main bearing fixed ring 13 and a main bearing moving ring 14 that can rotate relative to each other. The main bearing fixed ring 13 is fixedly connected to the shield body 10, and the main bearing moving ring 14 is fixedly connected to the drive disc 11, that is, the drive disc 11 can rotate relative to the shield body 10.

[0047] Further, such as Figure 2 As shown, a sealing chamber assembly is provided between the shield body 10 and the drive disc 11, and the sealing chamber assembly is used to seal the main drive bearing. The sealing chamber assembly includes an inner ring 20 and an outer ring 21 which are sleeved together, and an annular sealing chamber 22 is formed between the inner ring 20 and the outer ring 21, and at least one sealing ring is provided in the annular sealing chamber 22. The inner ring 20 is usually a sealing raceway, the outer ring 21 is usually a grease ring, and the sealing ring is usually a lip seal 23.

[0048] The inner ring 20 is sleeved on the circumferential outer side of the driving disk 11, and a flexible connector 30 is provided between the driving disk 11 and the inner ring 20 for absorbing the bouncing displacement of the driving disk 11, and the flexible connector 30 is connected and fixed to the driving disk 11 and the inner ring 20, and is used to connect the inner ring 20 to the driving disk 11 so that the inner ring 20 can rotate with the driving disk 11. The flexible connection between the inner ring 20 and the driving disk 11 can be achieved by an integral flexible connector 30, or by multiple flexible connectors 30; the flexible connector 30 is usually made of an elastic material with elasticity, and the preferred material is rubber, and other elastic composite materials can also be used.

[0049] In one embodiment, if Figure 2As shown, the flexible connecting member 30 is an elastic tube made of elastic material, and the elastic tube is arranged between the inner ring member 20 and the driving disk 11; specifically, the elastic tube is sleeved on the circumferential outer side of the driving disk 11, and the two can be connected by bonding, welding, etc., and the inner ring member 20 is sleeved on the circumferential outer side of the elastic tube, and the two can be connected by bonding, welding, etc.

[0050] In another embodiment, if Figure 4 As shown, the flexible connecting member 30 is an elastic ring made of elastic material, the outer edge of the elastic ring is connected to the end face of the inner ring member 20 by screws, and the inner edge of the elastic ring is connected to the end face of the driving disk 11 by screws; an elastic ring is fixed to the front end face and the rear end face of the inner ring member 20 by screws, thereby improving the stability of the flexible connection between the inner ring member 20 and the driving disk 11.

[0051] Since the inner ring 20 and the driving disk 11 are flexibly connected, when the driving disk 11 is in a stationary state, the inner ring 20 can move relatively easily relative to the driving disk 11, thereby causing the annular sealing chamber 22 to jump. Therefore, it is necessary to further limit the inner ring 20 to avoid the annular sealing chamber 22 from jumping.

[0052] In order to avoid the above problems, Figure 2 As shown, a swivel support 40 is provided at one end of the sealing chamber assembly close to the main drive bearing, and the inner ring 20 and the outer ring 21 which can rotate relatively are assembled on the swivel support 40 to keep the shape of the annular sealing chamber 22 basically unchanged.

[0053] Specifically, the slewing support member 40 includes an inner support ring 41 and an outer support ring 42 which are coaxially and rotatably sleeved together. One end of the inner ring member 20 is fixedly connected to the inner support ring 41, and the inner support ring 41 can rotate together with the inner ring member 20; one end of the outer ring member 21 is fixedly connected to the outer support ring 42, and the outer support ring 42 is connected to the shield body 10 or to the main bearing fixed ring 13 fixed on the shield body 10. The outer ring member 21 and the outer support ring 42 can remain stationary together with the shield body 10 (relative to the rotation of the drive disk 11, the shield body 10 remains non-rotating, that is, stationary).

[0054] In one embodiment, if Figure 2 and Figure 4 As shown, the slewing support member 40 is a rolling bearing, the inner ring of the rolling bearing serves as an inner support ring 41, and the front end face of the inner ring is connected to the rear end face of the inner ring member 20 by screws; the outer ring of the rolling bearing serves as an outer support ring 42, the front end face of the outer ring is connected to the rear end face of the outer ring member 21 by screws, and the rear end face of the outer ring is connected to the front end face of the main bearing fixed ring 13 by screws.

[0055] In another embodiment, the slewing support member 40 is a sliding bearing, the inner ring of the sliding bearing serves as an inner support ring 41, and the front end face of the inner ring is connected to the rear end face of the inner ring member 20 by screws; the outer ring of the sliding bearing serves as an outer support ring 42, the front end face of the outer ring is connected to the rear end face of the outer ring member 21 by screws, and the rear end face of the outer ring is connected to the front end face of the main bearing fixed ring 13 by screws.

[0056] Implementation method 2:

[0057] like Figure 3 As shown, the present invention also provides another main drive sealing system of a tunnel boring machine, which includes a sealing chamber assembly, a flexible connector 30 and a slewing support 40. The sealing chamber assembly is arranged between the shield unit and the drive disc unit of the tunnel boring machine, and the sealing chamber assembly has an inner ring 20 and an outer ring 21 which are connected to each other, and an annular sealing chamber 22 is formed between the inner ring 20 and the outer ring 21; the flexible connector 30 is arranged between the sealing chamber assembly and the shield unit, and the flexible connector 30 is used to absorb the jumping displacement of the drive disc unit; the slewing support 40 is arranged on the drive disc unit, and the inner ring 20 and the outer ring 21 can be relatively rotatably connected to the slewing support 40, so as to reduce the radial jumping of the annular sealing chamber 22 when the inner ring 20 and the outer ring 21 are relatively rotating, and keep the shape of the annular sealing chamber 22 basically unchanged.

[0058] A flexible connector 30 is added between the sealing chamber assembly and the shield unit so that the entire sealing chamber assembly can jump together with the drive disk unit, thereby avoiding the influence of the jumping of the drive disk unit on the annular sealing chamber 22. The jumping of the drive disk 11 and the sealing chamber assembly caused by the force on the blade disk 12 in the drive disk unit is absorbed by the flexible connector 30, and the entire annular sealing chamber 22 jumps together with the drive disk 11, thereby maintaining the stability of the shape of the annular sealing chamber 22.

[0059] A swivel support 40 is added between the sealing chamber assembly and the drive disk unit. The inner ring 20 and the outer ring 21 in the sealing chamber assembly are directly assembled on the swivel support 40. The vibration of the annular sealing chamber 22 is no longer affected by other assembly relationships, but is directly determined by the vibration of the swivel support 40. The precision of the swivel support 40 is used to ensure the stability of the vibration of the annular sealing chamber 22 when the equipment is running.

[0060] The specific structure of each part of the main drive sealing system of the tunnel boring machine in this embodiment, as well as the position and connection relationship between the parts will be described in detail below.

[0061] The structures of the drive disk unit and the shield unit have been described above and will not be repeated here.

[0062] The outer ring 21 is arranged on the inner side of the shield body 10 in the circumferential direction. A flexible connector 30 is arranged between the outer ring 21 and the shield body 10 to absorb the bouncing displacement of the drive disk 11. The flexible connector 30 is connected to the shield body 10 and the outer ring 21, and is used to connect the outer ring 21 to the shield body 10 so that the outer ring 21 can remain stationary together with the shield body 10. The flexible connection between the outer ring 21 and the shield body 10 can be achieved by an integral flexible connector 30 or by multiple flexible connectors 30; the flexible connector 30 is usually made of an elastic material with elasticity, and the preferred material is rubber, and other elastic composite materials can also be used.

[0063] In one embodiment, if Figure 3 As shown, the flexible connector 30 is an elastic tube made of elastic material, which is arranged between the outer ring 21 and the shield body 10; specifically, the elastic tube is sleeved on the circumferential outer side of the outer ring 21, and the two can be connected by bonding, welding, etc., and the shield body 10 is sleeved on the circumferential outer side of the elastic tube, and the two can be connected by bonding, welding, etc.

[0064] In another embodiment, the flexible connecting member 30 is an elastic ring made of elastic material, the outer edge of the elastic ring is connected to the end face of the shield body 10 by screws, and the inner edge of the elastic ring is connected to the end face of the outer ring member 21 by screws; an elastic ring is fixed to the front end face and the rear end face of the outer ring member 21 by screws, thereby improving the stability of the flexible connection between the outer ring member 21 and the shield body 10.

[0065] Since the outer ring 21 and the shield body 10 are flexibly connected, when the drive disk 11 and the shield body 10 are in a stationary state, the outer ring 21 can move relatively easily relative to the drive disk 11, thereby causing the annular sealing chamber 22 to vibrate. Therefore, it is necessary to further limit the outer ring 21 to avoid the annular sealing chamber 22 from vibrating.

[0066] In order to avoid the above problems, Figure 3 As shown, a swivel support 40 is provided at one end of the sealing chamber assembly close to the main drive bearing, and the inner ring 20 and the outer ring 21 which can rotate relatively are assembled on the swivel support 40 to keep the shape of the annular sealing chamber 22 basically unchanged.

[0067] Specifically, the rotary support member 40 includes an inner support ring 41 and an outer support ring 42 which are coaxially and rotatably connected together. One end of the outer ring member 21 is connected to the outer support ring 42, and the outer support ring 42 can remain stationary together with the outer ring member 21; one end of the inner ring member 20 is connected to the inner support ring 41, and the inner support ring 41 is connected to the drive disk 11, and the inner ring member 20 and the inner support ring 41 can rotate together with the drive disk 11.

[0068] In one embodiment, if Figure 3 As shown, the slewing support member 40 is a rolling bearing, the outer ring of the rolling bearing serves as an outer support ring 42, and the front end face of the outer ring is connected to the rear end face of the outer ring member 21 by screws; the inner ring of the rolling bearing serves as an inner support ring 41, and the front end face of the inner ring is connected to the rear end face of the inner ring member 20 by screws, and the inner ring is sleeved on the drive disk 11, and the two are connected and fixed.

[0069] In another embodiment, the rotary support member 40 is a sliding bearing, the outer ring of the sliding bearing serves as an outer support ring 42, and the front end face of the outer ring is connected to the rear end face of the outer ring member 21 by screws; the inner ring of the sliding bearing serves as an inner support ring 41, and the front end face of the inner ring is connected to the rear end face of the inner ring member 20 by screws, and the inner ring is sleeved on the drive disk 11, and the two are connected and fixed.

[0070] Implementation method three:

[0071] The present invention also provides a tunnel boring machine, which includes: a shield unit; a drive disc unit, the drive disc unit is rotatably arranged in the shield unit through a bearing; and a tunnel boring machine main drive sealing system as described in the first embodiment or the second embodiment, the tunnel boring machine main drive sealing system is arranged between the shield unit and the drive disc unit. The technical effect of the tunnel boring machine main drive sealing system has been described above and will not be repeated here.

[0072] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A main drive sealing system for a tunnel boring machine, characterized in that: include: A sealed chamber assembly is arranged between a shield unit and a drive disc unit of a tunnel boring machine, the sealed chamber assembly comprising an inner ring member (20) and an outer ring member (21) which are connected to each other, and an annular sealed chamber (22) is formed between the inner ring member (20) and the outer ring member (21); A flexible connecting member (30) is provided between the sealing chamber assembly and the shield unit or the drive disk unit, and the flexible connecting member (30) is used to absorb the bouncing displacement of the drive disk unit; The swivel support member (40) is arranged on the shield unit or the drive disk unit, and the inner ring member (20) and the outer ring member (21) are connected to the swivel support member (40) in a relatively rotatable manner, so as to reduce the radial runout of the annular sealing chamber (22) when the inner ring member (20) and the outer ring member (21) are in a relatively rotating state.

2. The main drive sealing system of the tunnel boring machine according to claim 1, characterized in that: The slewing support member (40) comprises an inner support ring (41) and an outer support ring (42) sleeved on the outer circumference of the inner support ring (41); the outer support ring (42) and the inner support ring (41) are coaxial and rotatably arranged; one end of the inner ring member (20) is connected to the inner support ring (41), and one end of the outer ring member (21) is connected to the outer support ring (42).

3. The main drive sealing system of the tunnel boring machine according to claim 2, characterized in that: The flexible connecting member (30) is connected between the inner ring member (20) and the drive disk unit, and the outer supporting ring (42) is connected to the shield unit.

4. The main drive sealing system of the tunnel boring machine according to claim 2, characterized in that: The flexible connecting member (30) is connected between the outer ring member (21) and the shield unit, and the inner supporting ring (41) is connected to the driving disk unit.

5. The main drive sealing system of the tunnel boring machine according to claim 1 or 2, characterized in that: The flexible connecting member (30) is an elastic tube made of elastic material; The elastic collet is arranged between the inner ring member (20) and the drive disk unit; or, the elastic collet is arranged between the outer ring member (21) and the shield unit.

6. The main drive sealing system of a tunnel boring machine according to claim 1 or 2, characterized in that: The flexible connecting member (30) is an elastic ring made of elastic material; The outer edge of the elastic ring is connected to the end surface of the inner ring (20) via a fixing member, and the inner edge of the elastic ring is connected to the end surface of the drive disk unit via a fixing member; or, the inner edge of the elastic ring is connected to the end surface of the outer ring (21) via a fixing member, and the outer edge of the elastic ring is connected to the end surface of the shield unit via a fixing member.

7. The main drive sealing system of a tunnel boring machine according to any one of claims 1 to 4, characterized in that: The rotary support member (40) is a rolling bearing or a sliding bearing, and the rolling bearing or the sliding bearing is arranged at one end of the sealing chamber component, and one end of the inner ring of the bearing is connected to the inner ring member (20), and one end of the outer ring of the bearing is connected to the outer ring member (21).

8. The main drive sealing system of the tunnel boring machine according to claim 7, characterized in that: The flexible connecting piece (30) is connected between the sealed chamber assembly and the drive disk unit, and the other end of the outer ring of the bearing is connected to the end surface of the shield unit.

9. The main drive sealing system of the tunnel boring machine according to claim 7, characterized in that: The flexible connecting piece (30) is connected between the sealing chamber assembly and the shield unit, and the inner ring of the bearing is sleeved on the driving disk unit.

10. A tunnel boring machine, characterized in that: include: Shield unit; A drive disk unit is rotatably disposed in the shield unit via a bearing; The main drive sealing system for a tunnel boring machine according to any one of claims 1 to 9, wherein the main drive sealing system for a tunnel boring machine is arranged between the shield unit and the drive disc unit.

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