Driving system and heading machine

Abstract

The utility model relates to the technical field of tunneling equipment, and provides a driving system and a tunneling machine. The main bearing is arranged in the shield body center ring, the main bearing is provided with an inner ring and an outer ring which are connected in a sleeved mode, and the outer side face of the outer ring is matched with the inner side face of the shield body center ring in an aligned mode so as to position the main bearing; the driving box is arranged at the rear end of the shield body center ring, and a driving device in driving connection with the main bearing is arranged in the driving box; the cutter head is arranged at the front end of the inner ring; the driving system has a first state of replacing the main bearing, and in the first state, the shield body center ring and the cutter head are fixedly connected through a connecting piece or fixedly connected through welding. The utility model can solve the problem that the main bearing of the shield tunneling machine in the prior art cannot be disassembled, repaired or replaced in a tunnel when the main bearing breaks down.

Description

Technical Field

[0001] This utility model relates to the field of tunneling equipment technology, and in particular to a drive system and tunneling machine that facilitates the disassembly and assembly of the main bearing. Background Technology

[0002] The main drive is a key component of large tunnel boring machines, and the main bearing is one of the core components of the main drive. During tunnel excavation, the main bearing is subjected to axial and radial loads, high torque, and instantaneous high impacts, which can cause damage. Existing main drive designs cannot remove and replace the main bearing from inside the tunnel. This invention proposes a main drive structure that allows the main bearing to be removed from inside the tunnel for replacement.

[0003] The existing drive structure has the cutterhead mounted on the drive plate, the drive plate mounted on the main bearing, and the main bearing mounted on the drive housing. Therefore, the drive housing is the component that ultimately bears the load. However, when the main bearing needs to be repaired or replaced inside the tunnel, reverse disassembly is required, that is, the drive housing must be disassembled first before the main bearing can be removed. The current assembly structure cannot achieve this reverse disassembly.

[0004] Chinese utility model patent with announcement number CN211144499U proposes a cutterhead structure that is easy to disassemble from the main drive. Its cutterhead flange has an extension portion. In the stopped state, it can be connected to the shield body through the bolt holes of the extension portion of the cutterhead flange to achieve a fixing function. However, this method cannot achieve the purpose of separating the cutterhead flange from the drive disc in the fixed state.

[0005] Chinese invention patent application CN117287465A discloses a replaceable main bearing seal structure and replacement method for a tunnel boring machine. An outer end cover, an inner end cover, a clamping ring, multiple sealing rings, and multiple isolation rings are all disposed between the inner and outer rings of the main bearing. After removing the outer end cover, inner end cover, and clamping ring, maintenance personnel can remove the sealing rings and isolation rings from the openings in the inner and outer rings of the main bearing without disassembling the main drive of the tunnel boring machine, allowing the main bearing seal structure to be replaced inside the tunnel. However, this invention only proposes the replacement of the seals and does not mention the method for replacing the main bearing.

[0006] Chinese utility model patent CN205400737U discloses a main drive device for dismantling a tunnel boring machine (TBM) inside the tunnel. This device allows for the dismantling and installation of the main drive within the TBM. It includes the shield body and the main drive at the shield's front end, as well as a cross beam and screw conveyor installed inside the shield body. The device utilizes welding lugs and adjustable hand-operated hoists for lifting, enabling the dismantling of the main drive within the tunnel. However, this utility model only describes the main drive dismantling device and does not explain how to remove and replace the main bearing.

[0007] Chinese utility model patent CN218718229U discloses a bearing and tunnel boring machine (TBM) that facilitates roller replacement. It addresses the problem in existing technologies where main bearing rollers in TBMs cannot be replaced inside the tunnel when they fail. The fixed ring has a bearing roller replacement channel within its annular sidewall. When the first frame bar and the bearing sealing cover are removed, the rollers in the pocket can pass through the bearing roller replacement channel into the internal cavity of the fixed ring. However, this utility model only considers the method of replacing the internal rollers of the main bearing and does not consider the method of replacing the entire main bearing after damage to the bearing raceway.

[0008] Chinese utility model patent CN216951655U discloses a quick-disassembly main drive sealing device for a tunnel boring machine, located between the main drive housing and the sealing support ring. When the first seal is damaged, the sealing pressure ring and sealing support ring can be directly disassembled to replace the front sealing ring without disassembling other sealing structures, thus reducing the difficulty and workload of seal disassembly and enabling rapid seal replacement. However, this utility model only considers the method of replacing the main drive seal and does not consider the method of replacing the main bearing after it is damaged.

[0009] Chinese utility model patent CN207944944U discloses a main drive external sealing device that is easy to assemble and disassemble. The utility model includes a detachable sleeve and a main drive runway. The detachable sleeve is installed on the central ring of the shield body, and the main drive runway is installed on the shield body. An external sealing assembly is provided between the detachable sleeve and the main drive runway. This utility model solves the problem of existing main drive external sealing devices being difficult to assemble and disassemble, but it does not consider the method of replacing the main bearing after damage.

[0010] In view of the shortcomings in the above-mentioned background technology, this utility model proposes a drive system and a tunneling machine to solve the problems in the prior art. Utility Model Content

[0011] The purpose of this invention is to provide a drive system and tunneling machine that can solve the problem in the prior art that the main bearing of a tunnel boring machine cannot be disassembled, repaired, or replaced inside the tunnel when it fails.

[0012] The above-mentioned technical objectives of this utility model are mainly achieved through the following technical solutions:

[0013] On one hand, this utility model provides a drive system, which includes:

[0014] The shield's central ring;

[0015] A main bearing is provided in the central ring of the shield body. The main bearing has an inner ring and an outer ring that fit together. The outer surface of the outer ring is aligned with the inner surface of the central ring of the shield body to position the main bearing.

[0016] A drive box is located at the rear end of the central ring of the shield body, and a drive device connected to the main bearing is provided inside the drive box.

[0017] A cutter head, wherein the cutter head is disposed at the front end of the inner ring;

[0018] The drive system is in a first state where the main bearing is being replaced. In the first state, the shield center ring and the cutterhead are fixedly connected by connectors or welding.

[0019] In a preferred embodiment of the present invention, the drive system further has a second state of tunneling operation, in which a pressure ring is provided at the front end of the central ring of the shield body.

[0020] In a preferred embodiment of this utility model, the front end of the inner ring is connected to a drive disk by screws, and the cutter disc is fixedly connected to the front end of the drive disk by screws.

[0021] In a preferred embodiment of this invention, the rear end of the outer ring is fixedly connected to the drive box by screws.

[0022] In a preferred embodiment of this utility model, the rear end of the shield body central ring is fixedly connected to the drive box by screws.

[0023] In a preferred embodiment of this utility model, the drive box is a split structure formed by splicing together multiple drive box blocks.

[0024] In a preferred embodiment of this utility model, the driving device includes:

[0025] Electric motor;

[0026] A speed reducer, which is connected to the motor;

[0027] The pinion is connected to the reducer, and the inner ring meshes with the pinion.

[0028] In a preferred embodiment of the present invention, the connector includes a first connecting part and a second connecting part connected together, and both the first connecting part and the second connecting part are fixedly connected to the cutter head and the shield body center ring respectively by screws.

[0029] In a preferred embodiment of the present invention, in the first state, a plurality of connecting members are provided at intervals along the circumferential direction of the cutter head.

[0030] On the other hand, the present invention also provides a tunneling machine, which includes the drive system described above.

[0031] Compared with the prior art, the technical solution of this utility model has the following features and advantages:

[0032] The drive system described in this invention eliminates the connection between the main bearing and the drive housing. Instead, a connection is designed between the main bearing and the shield's central ring. The outer side of the main bearing is directly mounted to the shield's central ring, rather than to the drive housing. This means the weight of the main bearing is borne by the shield's central ring. Therefore, when removing the drive housing, the main bearing remains unaffected, and the drive housing can be removed separately. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0034] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0035] Figure 1 This is a schematic diagram of the first state of the drive system described in this utility model;

[0036] Figure 2 This is a schematic diagram of the second state of the drive system described in this utility model;

[0037] Figure 3 This is a schematic diagram of the structure of the connector described in this utility model;

[0038] Figure 4 This is a cross-sectional view of the connector described in this utility model.

[0039] Explanation of reference numerals in the attached figures:

[0040] 10. Shield body central ring;

[0041] 20. Main bearing; 21. Inner ring; 22. Outer ring;

[0042] 30. Drive box; 31. Reducer; 32. Pinion gear;

[0043] 40. Cutter head; 41. Drive disc;

[0044] 50. Connector; 51. First connecting part; 52. Second connecting part;

[0045] 60. Pressure ring. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0047] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] Implementation Method 1:

[0050] like Figure 1 and Figure 2As shown, this utility model provides a drive system including a shield center ring 10, a main bearing 20, a drive housing 30, and a cutterhead 40. The main bearing 20 is located inside the shield center ring 10 and has an inner ring 21 and an outer ring 22 that fit together. The outer surface of the outer ring 22 is aligned with the inner surface of the shield center ring 10 to position the main bearing 20. The drive housing 30 is located at the rear end of the shield center ring 10 and contains a drive device connected to the main bearing 20. The cutterhead 40 is located at the front end of the inner ring 21. The drive system has a first state where the main bearing 20 is being replaced. In this first state, the shield center ring 10 and the cutterhead 40 are fixedly connected by a connector 50 or by welding.

[0051] The existing drive structure has the cutter head 40 mounted on the drive plate 41, the drive plate 41 mounted on the main bearing 20, and the main bearing 20 mounted on the drive housing 30. Therefore, the drive housing 30 is the component that ultimately bears the force. However, when the main bearing 20 needs to be repaired or replaced, there is not enough space for disassembly at the front end of the drive system. Therefore, reverse disassembly is required, that is, the drive housing 30 must be disassembled first before the main bearing 20 can be removed. However, the current assembly relationship cannot achieve the purpose of reverse disassembly.

[0052] The drive system described in this invention eliminates the mating relationship between the main bearing 20 and the drive housing 30. Instead, a mating relationship is designed between the main bearing 20 and the shield center ring 10. The outer side of the main bearing 20 is directly mounted to the shield center ring 10, rather than to the drive housing 30. This means the weight of the main bearing 20 is borne by the shield center ring 10. Therefore, when removing the drive housing 30, the main bearing 20 remains unaffected, and the drive housing 30 can be removed independently. Furthermore, the assembly reference for both the main bearing 20 and the drive housing 30 is unified to the shield center ring 10, reducing the accumulation of assembly errors compared to the original design and thus improving the rotational accuracy of the drive system.

[0053] The following will describe the specific structure of each part of the drive system described in this utility model, as well as the position and connection relationship between each part.

[0054] like Figure 1 and Figure 2 As shown, the drive system of this utility model includes a shield center ring 10, which is a ring-shaped component and serves as the outer support of the drive system.

[0055] like Figure 1 and Figure 2As shown, the drive system of this utility model also includes a main bearing 20, which is installed inside the shield center ring 10. The main bearing 20 includes an inner ring 21 and an outer ring 22 that are sleeved together, and the outer ring 22 and the inner ring 21 can rotate relative to each other. The outer surface of the outer ring 22 is tightly fitted with the inner surface of the shield center ring 10 to achieve the positioning of the main bearing 20; that is, there is an assembly relationship between the main bearing 20 and the shield center ring 10.

[0056] like Figure 1 and Figure 2 As shown, the drive system of this utility model also includes a drive housing 30, and the rear end of the shield body central ring 10 is fixedly connected to the drive housing 30 by screws. The drive housing 30 serves as the power source of the drive system, and is equipped with a drive device for driving the main bearing 20 to rotate.

[0057] Specifically, such as Figure 1 As shown, the drive device includes a motor (not shown), a reducer 31 and a pinion 32; the reducer 31 is connected to the motor, the pinion 32 is connected to the reducer 31, and the inner side of the inner ring 21 is provided with gear teeth, and the gear teeth on the inner ring 21 mesh with the gear teeth on the pinion 32.

[0058] Better, such as Figure 1 As shown, the rear end of the outer ring 22 is fixedly connected to the drive box 30 by screws to fix the outer ring 22.

[0059] like Figure 1 and Figure 2 As shown, the drive system of this utility model also includes a cutter head 40, and the front end of the inner ring 21 is connected to the drive disk 41 by screws. The cutter head 40 is fixedly connected to the front end of the drive disk 41 by screws.

[0060] Furthermore, such as Figure 1 As shown, when the drive system described in this utility model needs to replace the main bearing 20, the drive system is in the first state; in the first state, the shield center ring 10 and the cutter head 40 are fixedly connected by the connector 50 or welded together.

[0061] The specific process for replacing the main bearing 20 in the drive system described in this utility model is as follows:

[0062] After the drive system stops, a connector 50 is installed at the front end of the drive system to fix the cutterhead 40 and the shield center ring 10 to each other, or the cutterhead 40 and the shield center ring 10 are fixed to each other by welding, thereby fixing the cutterhead 40 and the drive disk 41 to the shield center ring 10.

[0063] Then, the reducer 31, pinion 32 and drive box 30 are removed from the rear end of the drive system. Since the main bearing 20 is positioned by the shield body center ring 10, the process of removing the drive box 30 from the rear end will not affect the main bearing 20 at the front end.

[0064] Finally, the main bearing 20 is removed and replaced, and the screw connection between the main bearing 20 and the drive disc 41 is released. Since the drive disc 41 and the cutter head 40 are fixed to the shield center ring 10 by the connector 50, the process of removing and replacing the main bearing 20 from the rear end will not affect the drive disc 41 and the cutter head 40 at the front end.

[0065] The structure and technical effects of the preferred embodiment of the drive system of this utility model will be further described below.

[0066] According to one embodiment of the present invention, such as Figure 2 As shown, when the drive system described in this utility model is in tunneling operation, the drive system is in the second state; in the second state, a pressure ring 60 is installed at the front end of the shield body center ring 10 by screws. The pressure ring 60 is used to fix the annular component in the drive system and can also prevent external impurities from entering the drive system.

[0067] According to one embodiment of the present invention, the drive box 30 is a split structure formed by splicing multiple drive box blocks, thereby ensuring smooth assembly and disassembly of the drive box 30 and improving the disassembly efficiency of the drive box 30.

[0068] According to one embodiment of the present invention, such as Figure 1 , Figure 3 and Figure 4 As shown, the connector 50 includes a first connecting portion 51 and a second connecting portion 52 connected together. Both the first connecting portion 51 and the second connecting portion 52 have bolt holes and are fixedly connected to the cutter head 40 and the shield center ring 10 respectively by screws. In this embodiment, the first connecting portion 51 is fixed to the front end face of the cutter head 40, and the second connecting portion 52 is fixed to the front end face of the shield center ring 10. Since the front end face of the cutter head 40 and the front end face of the shield center ring 10 are offset from each other in the axial direction, the first connecting portion 51 and the second connecting portion 52 have a stepped design.

[0069] According to one embodiment of the present invention, in the first state, a plurality of connecting members 50 are provided at intervals along the circumferential direction of the cutterhead 40, that is, a plurality of connecting members 50 are connected between the shield central ring 10 and the cutterhead 40, thereby improving the stability of the cutterhead 40 and the drive disk 41 in the first state.

[0070] Implementation Method Two:

[0071] This utility model also provides a tunneling machine, which includes the drive system described in Embodiment 1. The technical effects of the drive system within the tunneling machine have been explained above and will not be repeated here.

[0072] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A drive system, characterized in that, include: Shield body central ring (10); A main bearing (20) is provided in the central ring (10) of the shield body. The main bearing (20) has an inner ring (21) and an outer ring (22) that are fitted together. The outer side of the outer ring (22) is aligned with the inner side of the central ring (10) of the shield body to position the main bearing (20). A drive box (30) is provided at the rear end of the shield body central ring (10), and a drive device connected to the main bearing (20) is provided inside the drive box (30). A cutter head (40) is disposed at the front end of the inner ring (21); The drive system is in a first state where the main bearing (20) is being replaced. In the first state, the shield center ring (10) and the cutterhead (40) are fixedly connected by a connector (50) or welded together.

2. The drive system according to claim 1, characterized in that, The drive system also has a second state in which it is in tunneling operation, in which the front end of the shield center ring (10) is provided with a pressure ring (60).

3. The drive system according to claim 1 or 2, characterized in that, The front end of the inner ring (21) is connected to the drive disk (41) by screws, and the cutter head (40) is fixedly connected to the front end of the drive disk (41) by screws.

4. The drive system according to claim 3, characterized in that, The rear end of the outer ring (22) is fixedly connected to the drive box (30) by screws.

5. The drive system according to claim 4, characterized in that, The rear end of the shield body central ring (10) is fixedly connected to the drive box (30) by screws.

6. The drive system according to claim 1, characterized in that, The drive box (30) is a split structure formed by splicing multiple drive box blocks.

7. The drive system according to claim 1, characterized in that, The driving device includes: Electric motor; A speed reducer (31) is connected to the motor; The pinion (32) is connected to the reducer (31), and the inner ring (21) meshes with the pinion (32).

8. The drive system according to claim 1, characterized in that, The connector (50) includes a first connecting part (51) and a second connecting part (52) connected together. The first connecting part (51) and the second connecting part (52) are fixedly connected to the cutter head (40) and the shield center ring (10) respectively by screws.

9. The drive system according to claim 1 or 8, characterized in that, In the first state, a plurality of connecting members (50) are provided at intervals along the circumferential direction of the cutter head (40).

10. A tunneling machine, characterized in that, The tunneling machine includes the drive system according to any one of claims 1-9.

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