Shield tunneling machine center swivel joint transmission structure

Abstract

The utility model relates to the technical field of mine and tunnel construction, in particular to a shield tunneling machine center swivel joint transmission structure which comprises a transmission sleeve, a transition flange, a partition plate assembly and a center swivel joint structure. One end of the transmission sleeve is fixed on the cutterhead, and the other end is connected with the transition flange; one end, far away from the transmission sleeve, of the transition flange is fixed or integrally formed with the rotor; the partition plate assembly structure comprises a sealing structure and a soil bin partition plate. The soil bin partition plates are annularly distributed on the outer side of the transition flange. The sealing structure is annularly distributed on the outer side of the soil bin partition plate or integrated on the center rotary connector structure. One end, facing the transmission sleeve, of the soil bin partition plate is connected with the sealing structure; the center rotary connector structure comprises a stator and a rotor rotationally connected to the center of the stator. The stator is connected with the soil bin partition; one end of the rotor is fixed with the transition flange. According to the transmission structure, the disassembly and assembly steps are simple, and meanwhile the cutter head and the center rotary connector are allowed to have large different axial quantities.

Description

Technical Field

[0001] This utility model relates to the field of mining and tunnel construction technology, specifically to a transmission structure for a central rotary joint of a tunnel boring machine. Background Technology

[0002] In recent years, tunnel boring machines (TBMs) have been widely used in the construction of underground tunnels in urban areas. During TBM construction, modifiers such as foam, bentonite, and water need to be injected into the front of the cutterhead through a central rotary joint. The hydraulic oil and wear detection signals required on the cutterhead also need to be introduced into the cylinders and wear detection devices inside the cutterhead through the central rotary joint.

[0003] The central rotary joint consists of a rotor and a stator. Existing central rotary joints are typically fixed to the rear of the soil chamber partition via the stator, with the cutterhead rotating to drive the rotor. However, because the cutterhead, soil chamber partition, and central rotary joint are manufactured separately and assembled individually, machining and installation errors exist. It is difficult to ensure the coaxiality of the rotation centers of the cutterhead and the central rotary joint. If a rigid connection is used, it will cause poor rotor rotation, damage to bearings and sealing devices, and affect the use of the central rotary joint in the tunnel boring machine.

[0004] Currently, the problem of misaligned shafts is solved by adding a transmission structure to replace rigid connections with floating connections. However, this structure is relatively complex, inconvenient to disassemble and assemble, or limited by structural constraints, resulting in insufficient allowance for installation and inability to compensate for significant machining and assembly errors. Rigid connections may still occur during use. Therefore, designing a new transmission structure is essential. Summary of the Invention

[0005] The purpose of this utility model is to provide a transmission structure for the central rotary joint of a tunnel boring machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A transmission structure for a central rotary joint of a tunnel boring machine includes a transmission sleeve, a transition flange, a diaphragm assembly, and a central rotary joint structure.

[0008] The transmission sleeve serves as a power transmission component for the cutter head. One end is fixed to the cutter head, and the other end is floatingly connected to the transition flange. When the cutter head rotates, it drives the transition flange to rotate.

[0009] The transition flange serves as the power input component for the cutter head, with one end away from the transmission sleeve fixed to the rotor or integrally formed with the rotor.

[0010] The partition assembly structure includes a sealing structure and a soil chamber partition; the soil chamber partition is arranged around the outside of the transition flange; the sealing structure is arranged around the outside of the soil chamber partition or integrated into the central rotary joint structure; one end of the soil chamber partition facing the transmission sleeve is connected to the sealing pressure ring in the sealing structure, and the other end is fixed to the central rotary joint structure.

[0011] The central rotary joint structure includes a stator and a rotor rotatably connected to the center of the stator, which can rotate relative to each other; the stator is detachably connected to the soil chamber partition; one end of the rotor is fixed to the transition flange.

[0012] Furthermore, it also includes a cutter head drive beam, which is fixed between the cutter head and the drive sleeve.

[0013] Furthermore, the cutter head connecting beam and / or transmission sleeve are both hollow structures to facilitate the arrangement of cutter head pipelines.

[0014] Furthermore, the transmission sleeve is formed by two symmetrical upper and lower parts that are fastened together and threaded together.

[0015] Furthermore, the transmission sleeve includes a flange and a sleeve; one end of the sleeve is fixed to the flange and is fixed to the cutter head transmission beam or cutter head through the flange, and the other end of the sleeve is floatingly connected to the transition flange.

[0016] Furthermore, the floating connection between the transmission sleeve and the transition flange can be either a slotted block connection or a spline connection.

[0017] Furthermore, when the transmission sleeve and the transition flange are connected by a slot and a block, a slot is provided at one end of the sleeve near the transition flange, and a block is provided on the transition flange to cooperate with the slot.

[0018] Furthermore, when the transmission sleeve and the transition flange are connected by a spline, a spline is provided on the contact end face of either the transmission sleeve or the transition flange, and a keyway that mates with the spline is provided on the other component.

[0019] Furthermore, the upper end face of the transition flange is provided with a pipeline interface for connecting the cutter head pipeline.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The shield machine center rotary joint transmission structure adopted in this utility model solves the problems of complex structure, inconvenience of disassembly and assembly, or small installation margin in the prior art. It simplifies the assembly steps, reduces the failure rate of the center rotary joint, and allows for a large difference in axial distance between the cutterhead and the center rotary joint. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the assembly of the transmission structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the transmission sleeve of this utility model;

[0024] Figure 3 This is a schematic diagram of the partition assembly of this utility model.

[0025] In the diagram: 1. Cutterhead connecting beam; 2. Transmission sleeve; 201. Flange; 202. Sleeve; 203. Slot; 3. Cutterhead pipeline; 4. Transition flange; 5. Baffle assembly; 501. Sealing structure; 502. Soil chamber baffle; 6. Stator; 7. Rotor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 3 This utility model provides a transmission structure for the central rotary joint of a tunnel boring machine, including a cutterhead transmission beam, a transmission sleeve 2, a transition flange 4, a partition assembly 5, and a central rotary joint structure.

[0028] The cutter head transmission beam, as the power output component of the cutter head, is fixed on the cutter head and rotates with it. The cutter head connecting beam 1 is hollow inside and has cutter head pipes 3 arranged inside, which serves to protect the cutter head pipes 3.

[0029] The cutter head connecting beam 1 is not limited to one form shown in the attached drawings. Other structures can also be considered as cutter head connecting beam 11 as long as they serve the same function. Alternatively, the cutter head connecting beam 1 may not exist, and the transmission sleeve 2 can be directly fixedly connected to the cutter head.

[0030] The transmission sleeve 2, serving as the power transmission component for the cutter head, is composed of two symmetrical upper and lower parts that are interlocked and threaded together. The transmission sleeve 2 is hollow inside and houses the cutter head pipeline 3, serving to protect the pipeline 3. The transmission sleeve 2 as a whole includes a flange 201 and a sleeve 202. One end of the sleeve 202 is fixed to the flange 201 and is fixed to the cutter head transmission beam through the flange 201. The other end of the sleeve 202 is floatingly connected to the transition flange 4, which rotates when the cutter head rotates.

[0031] Preferably, the floating connection between the transmission sleeve 2 and the transition flange 4 can be either a slot 203 locking block connection or a spline connection. If the slot 203 locking block connection is chosen, a slot 203 is provided at the end of the sleeve 202 furthest from the flange 201, and the transition flange 4 has a locking block that mates with the slot 203. The locking block on the transition flange 4 is not limited in form; it can be integrally machined with the transition flange 4, welded to the transition flange 4 as a steel block, or fixed to the transition flange 4 by pins, bolts, etc. If the spline connection is chosen, a spline is provided on the contact end face of either the transmission sleeve 2 or the transition flange 4, and a keyway mates with the spline on the other component.

[0032] The transition flange 4 serves as the power input component for the cutter head. One end near the transmission sleeve 2 has a locking block that floats and connects to the slot 203, while the other end is fixed to the rotor 7. A pipe interface is provided on the upper surface of the transition flange 4 for connecting the cutter head pipe 3. The transition flange 4 can be integrated with the rotor 7, or it may not be a separate component.

[0033] The partition assembly 5 includes a sealing structure 501 and a soil chamber partition 502. The soil chamber partition 502 is arranged around the outside of the transition flange 4, serving to seal the soil chamber and prevent soil from entering the tunnel boring machine. The sealing structure 501 is arranged around the outside of the soil chamber partition 502, serving to isolate soil from entering the central rotary joint and protect the bearings of the central rotary joint. One end of the soil chamber partition 502 facing the transmission sleeve 2 is bolted to the sealing ring in the sealing structure 501, and the other end is fixed to the central rotary joint structure.

[0034] Preferably, the sealing structure 501 can also be adjusted in installation position, such as being integrated into the stator 6 of the central rotary joint.

[0035] The central rotary joint structure includes a stator 6 and a rotor 7 rotatably connected to the center of the stator 6, which can move relative to each other. The stator 6 is bolted to the earth chamber partition 502; one end of the rotor 7 is fixed to the transition flange 4.

[0036] During assembly, the stator 6 is first fixedly connected to the earth chamber partition 502. The rotor 7 is axially limited by bearings and shaft end baffles to fix the rotor 7. The transition flange 4 is fixedly connected to the rotor 7. The sealing structure 501 is installed. The cutter head connecting beam 1 is installed in the corresponding position along with the cutter head, and has pre-installed cutter head pipeline 3 inside. The cutter head pipeline 3 is fixed to the transition flange 4 through the pipeline interface. The slot 203 is aligned with the locking block on the transition flange 4. The upper and lower parts of the transmission sleeve 2 are combined and fixed together to the cutter head connecting beam 1. At this point, the transmission structure assembly is completed.

[0037] During dismantling, the transmission sleeve 2 is removed from the cutterhead connecting beam 1 and disassembled into upper and lower parts for removal; the cutterhead pipeline 3 is disconnected from the transition flange 4; the sealing structure 501 is removed; the stator 6 is removed from the soil chamber partition 502, and the central rotary joint can then be removed as a whole. The transition flange 4 can be fixed on the rotor 7 and removed together; the cutterhead connecting beam 1 can be removed along with the cutterhead. At this point, the dismantling of the transmission structure is complete.

[0038] In the transmission structure of this utility model, as described above, the cutter head transmission beam is fixed on the cutter head, and one end of the transmission sleeve 2 is fixed on the cutter head transmission beam. When the cutter head rotates, both rotate together with the cutter head. One end of the transition flange 4 is fixed on the rotor 7 of the central rotary joint, and the locking block at the other end is embedded in the locking groove 203 of the transmission sleeve 2. When the transmission sleeve 2 rotates, it drives the transition flange 4 and the rotor 7 to rotate together. The locking block and locking groove 203 structure can reserve a large installation margin, allowing for a large misalignment between the cutter head and the central rotary joint. The transmission sleeve 2 is divided into upper and lower halves. The disassembly work can be completed by removing the transmission sleeve 2 from the transmission beam and disassembling it, and then the disassembly work of the remaining structures can be carried out. During assembly, after the remaining structures are assembled, the upper and lower halves of the transmission sleeve 2 are joined together and fixed on the transmission beam to complete the entire assembly work.

[0039] Therefore, according to this utility model, the disassembly and assembly steps of the transmission structure are simple, while allowing for a large difference in axial distance between the cutter head and the central rotary joint.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmission structure for a central rotary joint of a tunnel boring machine, characterized in that: This includes the structure of the transmission sleeve, transition flange, diaphragm assembly, and center rotary joint; The transmission sleeve serves as a power transmission component for the cutter head. One end is fixed to the cutter head, and the other end is floatingly connected to the transition flange. When the cutter head rotates, it drives the transition flange to rotate. The transition flange serves as the power input component for the cutter head, with one end away from the transmission sleeve fixed to the rotor or integrally formed with the rotor. The partition assembly structure includes a sealing structure and a soil compartment partition; The soil silo is surrounded by a ring on the outside of the transition flange; the sealing structure is surrounded by a ring on the outside of the soil silo or integrated into the central rotary joint structure; one end of the soil silo facing the transmission sleeve is connected to the sealing pressure ring in the sealing structure, and the other end is fixed to the central rotary joint structure. The central rotary joint structure includes a stator and a rotor rotatably connected to the center of the stator, which can rotate relative to each other; the stator is detachably connected to the soil chamber partition; one end of the rotor is fixed to the transition flange.

2. The shield machine center rotary joint transmission structure as described in claim 1, characterized in that: It also includes a cutter head drive beam, which is fixed between the cutter head and the drive sleeve.

3. The shield machine center rotary joint transmission structure as described in claim 1, characterized in that: The cutter head connecting beam and / or transmission sleeve are both hollow internal structures to facilitate the arrangement of cutter head pipelines.

4. The shield machine center rotary joint transmission structure as described in claim 1, characterized in that: The transmission sleeve is composed of two symmetrical upper and lower parts that are fastened together and threaded together.

5. The shield machine center rotary joint transmission structure as described in claim 2, characterized in that: The transmission sleeve includes a flange and a sleeve; one end of the sleeve is fixed to the flange and is fixed to the cutter head transmission beam or cutter head through the flange, and the other end of the sleeve is floatingly connected to the transition flange.

6. The shield machine center rotary joint transmission structure as described in claim 1, characterized in that: The floating connection between the transmission sleeve and the transition flange can be either a slotted block connection or a spline connection.

7. The shield machine center rotary joint transmission structure as described in claim 6, characterized in that: When the transmission sleeve and the transition flange are connected by a slot and a block, a slot is provided at one end of the sleeve near the transition flange, and a block is provided on the transition flange to cooperate with the slot.

8. The shield machine center rotary joint transmission structure as described in claim 6, characterized in that: When the transmission sleeve and the transition flange are connected by a spline, a spline is provided on the contact end face of either the transmission sleeve or the transition flange, and a keyway that mates with the spline is provided on the other part.

9. The transmission structure of the central rotary joint of the tunnel boring machine as described in claim 1, characterized in that: The upper end face of the transition flange is provided with a pipeline interface for connecting the cutter head pipeline.

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