Disc cutter of tunnel boring machine

Abstract

The utility model relates to the technical field of disc cutters, and discloses a tunnel boring machine disc cutter which comprises a cutter shaft, the cutter shaft is connected with a metal sealing ring, a shaft center and a gasket, the cutter shaft is connected with a cutter ring, the cutter ring is fixedly connected with a dustproof plate, a hydraulic rod is arranged in the cutter ring, and the hydraulic rod is fixedly connected with the shaft center. The cutter ring is connected with a plurality of wedge-tooth-shaped cutting edges in a sliding manner; a plurality of bases are arranged on a cutter ring, the bases are connected with wedge-tooth-shaped blades in a sliding mode, the wedge-tooth-shaped blades are fixedly connected with the telescopic ends of hydraulic rods, the hydraulic rods are communicated with an annular guide groove of a shaft center, and the annular guide groove of the shaft center is communicated with a cutter shaft guide groove. And then the wedge-tooth-shaped cutting edge is gradually pushed out of the range of the cutter ring through hydraulic oil, the problem that the wedge-tooth-shaped cutting edge is broken due to the fact that the wedge-tooth-shaped cutting edge firstly makes contact with hard rock is solved, and meanwhile the service life of the wedge-tooth-shaped cutting edge is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of disc cutter technology, specifically a disc cutter for a tunnel boring machine. Background Technology

[0002] Disc cutterheads are key crushing tools installed on the cutterheads of tunnel boring machines (such as shield machines and TBMs). They are mainly used for excavating hard rock formations. Their structure mainly includes components such as cutter rings, cutter bodies, bearings, spindles, and sealing devices. The cutter rings are usually made of high alloy steel, hot work die steel, or composite materials, which have high hardness and wear resistance.

[0003] There are two types of existing cutter rings: one is a relatively smooth flat-blade cutter ring with low sharpness, and the other is a cutter ring with wedge-shaped teeth. In the latter, the wedge-shaped teeth are the first to contact the excavation base during tunneling. However, the excessive sharpness of the cutting edge will reduce its impact resistance and toughness, and it is prone to chipping or breaking when encountering extremely hard rock or fissures.

[0004] To address this, a disc cutter head for tunnel boring machines is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a disc cutter head for a tunnel boring machine to solve the problem mentioned in the background art that an overly sharp cutting edge reduces its impact resistance and toughness, and is prone to chipping or breakage when encountering extremely hard rock or fissures.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a disc cutter head for a tunnel boring machine, comprising a cutter shaft, a metal sealing ring connected to the cutter shaft, a shaft center connected to the cutter shaft, a gasket connected to the cutter shaft, a cutter ring connected to the cutter shaft, a dustproof plate fixedly connected to the cutter ring, a hydraulic rod provided inside the cutter ring, a plurality of wedge-shaped cutting edges slidably connected to the cutter ring, and the wedge-shaped cutting edges fixedly connected to the telescopic end of the hydraulic rod.

[0007] Preferably, the cutter shaft has a guide groove for hydraulic oil flow, the cutter shaft is fixedly connected to the shaft center, and one side of the guide groove has an outlet groove for hydraulic oil flow.

[0008] Preferably, the shaft has an annular guide groove for connecting multiple hydraulic rods, and the shaft is fixedly connected to a cutter ring.

[0009] Preferably, the annular guide groove is connected to the guide groove, and the annular guide groove is connected to the lead-out groove.

[0010] Preferably, both ends of the blade ring are provided with dustproof plates, the dustproof plates are fixedly connected to metal sealing rings, and the metal sealing rings are fixedly connected to the shaft.

[0011] Preferably, the cutter ring is fixedly connected to a plurality of hydraulic rods arranged in a ring, and the hydraulic rods are slidably connected to the inner wall of the cutter ring.

[0012] Preferably, the blade ring has a base for sliding the wedge-shaped blade, and the base is slidably connected to the wedge-shaped blade.

[0013] Preferably, the wedge-shaped cutting edge is located on the inner side of the blade ring.

[0014] Preferably, the diameter of the lead-out groove is smaller than the diameter of the guide groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features a cutter ring with multiple bases, each slidably connected to a wedge-shaped cutting edge. The wedge-shaped cutting edge is fixedly connected to the telescopic end of a hydraulic rod, which communicates with an annular guide groove on the shaft. This annular guide groove on the shaft also communicates with a guide groove on the cutter shaft. When the disc hob is in operation, the cutter ring first contacts the hard rock, and then the wedge-shaped cutting edge is gradually pushed out of the cutter ring range by hydraulic oil. This avoids the problem of breakage caused by the wedge-shaped cutting edge contacting the hard rock first, and also improves the service life of the wedge-shaped cutting edge. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall side cross-sectional structure of this utility model;

[0018] Figure 2 This is a top view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall rotational direction structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall planar cross-sectional structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the connection between the shaft and the cutter ring of this utility model;

[0022] Figure 6 This is a schematic diagram of the overall disassembled structure of this utility model.

[0023] In the diagram: 1. Cutter shaft; 2. Metal seal ring; 3. Shaft; 4. Gasket; 5. Cutter ring; 6. Dustproof plate; 7. Hydraulic rod; 8. Wedge-shaped cutting edge;

[0024] 301. Lead-out groove; 302. Guide groove;

[0025] 501. Base. 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] Example

[0028] Please see Figures 1-6 The diagram shows a disc cutter head for a tunnel boring machine, comprising a cutter shaft 1, a metal sealing ring 2 connected to the cutter shaft 1, a shaft center 3 connected to the cutter shaft 1, a gasket 4 connected to the cutter shaft 1, a cutter ring 5 connected to the cutter shaft 1, a dustproof plate 6 fixedly connected to the cutter ring 5, a hydraulic rod 7 inside the cutter ring 5, and multiple wedge-shaped cutting edges 8 slidably connected to the cutter ring 5. The wedge-shaped cutting edges 8 are fixedly connected to the telescopic end of the hydraulic rod 7. This invention features multiple bases on the cutter ring, with the wedge-shaped cutting edges slidably connected to the bases. The wedge-shaped cutting edges are fixedly connected to the telescopic end of the hydraulic rod. The hydraulic rod communicates with the annular guide groove of the shaft center, and the annular guide groove of the shaft center communicates with the guide groove of the cutter shaft. When the disc cutter head is working, the cutter ring first contacts the hard rock, and then the wedge-shaped cutting edges are gradually pushed out of the cutter ring range by hydraulic oil, reducing the problem of the wedge-shaped cutting edges breaking due to initial contact with the hard rock, and improving the service life of the wedge-shaped cutting edges.

[0029] Furthermore, the cutter shaft 1 has a guide groove 302 for hydraulic oil flow. The cutter shaft 1 is fixedly connected to the shaft 3. One side of the guide groove has an outlet groove 301 for hydraulic oil flow. The diameter of the outlet groove is smaller than the diameter of the guide groove. By opening the guide groove and the outlet groove on the cutter shaft, and at the same time, the diameter of the outlet groove is smaller than the diameter of the guide groove, the flow of hydraulic oil and the stability of hydraulic pressure are ensured.

[0030] Furthermore, the shaft 3 is provided with an annular guide groove for connecting multiple hydraulic rods 7. The shaft 3 is fixedly connected to the cutter ring 5. The annular guide groove is connected to the guide groove and the annular guide groove is connected to the lead-out groove. By providing an annular guide groove for connecting multiple hydraulic rods on the shaft, and the annular guide groove is connected to the guide groove and the annular guide groove is connected to the lead-out groove, the stability of hydraulic oil flow is ensured.

[0031] Furthermore, dustproof plates 6 are provided at both ends of the cutter ring 5. The dustproof plates 6 are fixedly connected to the metal sealing ring 2, and the metal sealing ring 2 is fixedly connected to the shaft 3. Multiple hydraulic rods 7 are fixedly connected to the cutter ring 5 in a ring-shaped distribution. The hydraulic rods 7 are slidably connected to the inner wall of the cutter ring 5 and are tightly pressed onto the cutter ring by the dustproof plates. At the same time, their inner edges must be tightly pressed against the previously installed metal sealing ring. This can effectively prevent external contaminants such as rock powder and mud from entering the internal hydraulic system and bearing cavity, and at the same time prevent hydraulic oil leakage.

[0032] Furthermore, the cutter ring 5 has a base 501 for sliding the wedge-shaped cutting edge. The base 501 is slidably connected to the wedge-shaped cutting edge 8. The wedge-shaped cutting edge 8 is fixedly connected to the hydraulic rod 7 telescopic rod. The wedge-shaped cutting edge 8 is located inside the cutter ring 5. By having a base for sliding the wedge-shaped cutting edge in the cutter ring, it is ensured that the wedge-shaped cutting edge can be stored while its position can be adjusted as needed for better tunneling.

[0033] In this scheme, the assembly process is as follows: Take the core load-bearing component, the cutter shaft 1, and fix the shaft 3 to the cutter shaft 1 to ensure its coaxiality and structural stability. The shaft 3 is also machined with an annular guide groove. After assembly, the annular guide groove must be precisely aligned with the guide groove inside the cutter shaft 1 and kept in communication. At the designated installation position of the cutter shaft 1, a metal sealing ring 2 is fitted. On the inside of the cutter ring 5, it is fixedly connected to the cylinder end of multiple hydraulic rods 7. At the same time, the telescopic rod end of each hydraulic rod 7 is fixedly connected to the corresponding wedge-shaped cutting edge 8. The connected wedge-shaped cutting edges 8 are placed one by one into the specially opened base 501 on the cutter ring 5, so that the cutting edge can slide smoothly in the base. At this time, the telescopic rod of the hydraulic rod 7 also forms a sliding connection with the inner wall of the cutter ring 5. The cutter ring 5 and the shaft 3 are fixedly connected to form the main frame of the hob. Finally, dustproof plates 6 are installed at both ends of the cutter ring 5. The dustproof plates 6 must be tightly pressed onto the cutter ring 5, and their inner edges must be tightly pressed against the previously installed metal sealing ring 2. The metal sealing ring 2 is then tightly pressed against the shaft 3.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] 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 tunnel boring machine disc cutter, characterized by: Including the knife shaft (1), the metal seal ring (2) is connected with the knife shaft (1), the shaft center (3) is connected with the knife shaft (1), the gasket (4) is connected with the knife shaft (1), the knife ring (5) is connected with the knife shaft (1), the dustproof plate (6) is fixedly connected with the knife ring (5), the hydraulic rod (7) is arranged in the knife ring (5), a plurality of wedge-tooth type knife edges (8) are slidably connected with the knife ring (5), and the hydraulic rod (7) telescopic end is fixedly connected with the wedge-tooth type knife edge (8).

2. A TBM disc cutter according to claim 1, characterised in that: The guide groove (302) for the flow of hydraulic oil is arranged in the knife shaft (1), the shaft center (3) is fixedly connected with the knife shaft (1), and the guide groove (302) is provided with the lead-out groove (301) for the flow of hydraulic oil on one side.

3. A TBM disc cutter according to claim 2, characterised in that: The annular guide groove for connecting a plurality of hydraulic rods (7) is arranged in the shaft center (3), and the shaft center (3) is fixedly connected with the knife ring (5).

4. A TBM disc cutter according to claim 3, characterised in that: The annular guide groove is communicated with the guide groove, and the annular guide groove is communicated with the lead-out groove.

5. A TBM disc cutter according to claim 1, wherein: The dustproof plate (6) is arranged at both ends of the knife ring (5), the metal seal ring (2) is fixedly connected with the dustproof plate (6), and the metal seal ring (2) is fixedly connected with the shaft center (3).

6. A TBM disc cutter according to claim 1, wherein: The knife ring (5) is fixedly connected with a plurality of annularly distributed hydraulic rods (7), and the hydraulic rod (7) telescopic rod is slidably connected with the inner wall of the knife ring (5).

7. A TBM disc cutter according to claim 1, wherein: The base (501) for sliding the wedge-tooth type knife edge is arranged in the knife ring (5), and the base (501) is slidably connected with the wedge-tooth type knife edge (8).

8. A TBM disc cutter according to claim 1, wherein: The wedge-tooth type knife edge (8) is arranged in the inner side of the knife ring (5).

9. A TBM disc cutter according to claim 2, wherein: The diameter of the lead-out groove is smaller than the diameter of the guide groove.

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