A shield tunneling machine main drive system and shield tunneling machine

Abstract

The application discloses a shield machine main driving system and a shield machine. The shield machine main driving system is arranged in a shield body. The shield machine main driving system comprises a driving box, a motor speed reducer and a telescopic assembly arranged outside the driving box, and a driving gear arranged in the driving box. A main bearing is arranged on the outer circumferential surface of the front end of the driving box. The main bearing comprises a bearing outer ring and a bearing inner ring. The bearing inner ring is rotatable relative to the bearing outer ring. The bearing outer ring is fixed to the outer wall of the front end of the driving box. A flange assembly is fixed to the outer wall of the front end of the bearing inner ring. A cutter head assembly is fixed to the flange assembly. The cutter head assembly is fixed to the driving box through the main bearing and the flange assembly. When the cutter head assembly needs to be replaced, the telescopic assembly can be used to push the cutter head assembly to slide forward, so that the space for replacing the cutter head assembly is increased, the operator can work conveniently, and the cutter replacement efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield machines, in particular to a shield machine main driving system and a shield machine. BACKGROUND

[0002] The infrastructure of China is in a period of rapid development, however, there are more mountains in China, and tunnels often need to be excavated to facilitate the construction of railways or highways. In the process of excavating tunnels, the application of shield machines is indispensable. During use, the cutters of the shield machine are severely worn, and manual cutter replacement operations are required to maintain high excavation efficiency.

[0003] At present, the existing technology mostly sets a multi-point manual crane in the center warehouse, and realizes the horizontal and vertical movement of the cutter by pulling the crane at different points. The corresponding cutter box needs to be rotated to the lowest position of the cutter disc, and the operator then enters the bottom normal pressure cutter box along the center warehouse to implement normal pressure cutter replacement. Although this can ensure construction safety, the space for cutter replacement in the shield machine is small, and the operator is not convenient to operate, which leads to low cutter replacement efficiency and cannot guarantee the high excavation efficiency of the shield machine.

[0004] Therefore, how to improve the cutter replacement efficiency of the shield machine is a technical problem that needs to be solved by those skilled in the art at present. SUMMARY

[0005] The purpose of the present application is to provide a shield machine main driving system to improve the cutter replacement efficiency of the shield machine.

[0006] To achieve the above purpose, the present application provides a shield machine main driving system for installation in a shield body, which comprises:

[0007] A driving box is slidably arranged in the shield body, and a motor reducer and an extension assembly are arranged on the outside of the driving box. The motor reducer is connected with a driving gear arranged in the driving box;

[0008] A main bearing is sleeved on the outer circumferential surface of the front end of the driving box. The main bearing comprises a bearing outer ring and a bearing inner ring. The bearing inner ring is rotatable relative to the bearing outer ring. The bearing outer ring is fixedly arranged on the front end outer wall of the driving box, and the inner teeth of the bearing inner ring are engaged with the driving gear;

[0009] A flange assembly is fixedly arranged on the front end outer wall of the bearing inner ring;

[0010] A cutter disc assembly is fixedly arranged on the flange assembly, and is used to rotate under the driving action of the motor reducer and to extend and retract in the shield body under the extension and retraction of the extension assembly.

[0011] The utility model provides a kind of shield machine main drive system, telescopic assembly includes: telescopic frame, ring, one side of telescopic frame is fixed on the rear end surface of drive box, and the other side of telescopic frame is arranged with multiple groups of oil cylinder seat along the circumferential direction;Telescopic oil cylinder, one end is hinged with oil cylinder seat, the other end is used to be fixedly connected with the support frame of shield body.

[0012] A kind of shield machine main drive system, shield machine main drive system further includes anti-twist component, anti-twist component is symmetrically arranged between telescopic frame and shield body inner wall, one end of anti-twist component is fixedly connected with the outer circumferential surface of telescopic frame, the other end is slidably attached on shield body inner wall.

[0013] A kind of shield machine main drive system, flange component includes flange body, the rear end surface of flange body is fixed on the front end surface of bearing inner ring, and the rear end surface of flange body and the front end surface of drive box are equipped with avoiding gap, and the front end surface of flange body is arranged with multiple groups of through mounting hole along the circumferential direction, and the both sides of mounting hole are equipped with the connecting seat and cabin that are communicated with each other.

[0014] A kind of shield machine main drive system, cabin is equipped with hatch, and the opening direction of hatch is towards the axial center line in shield body.

[0015] A kind of shield machine main drive system, shield machine main drive system is equipped with operation platform, and operation platform includes first operation platform, second operation platform and third operation platform, first operation platform is fixedly arranged on the bottom of shield body, second operation platform is fixedly arranged on the middle of shield body, and third operation platform is fixedly arranged on the top of shield body, and first operation platform, second operation platform and third operation platform are used to open hatch.

[0016] A kind of shield machine main drive system, shield machine main drive system further includes sealing assembly, sealing assembly includes first sealing piece and second sealing piece, first sealing piece is sleeved on the outer circumferential surface of flange body, and the side of first sealing piece towards main bearing is fixedly arranged with connecting ring, and the other side of connecting ring is fixedly arranged on the front end surface of bearing outer ring, so that first sealing piece is fixedly connected with bearing outer ring;Second sealing piece is located between first sealing piece and shield body inner wall, and second sealing piece extends in the direction towards connecting ring, so that connecting ring, bearing outer ring and drive box are located in second sealing piece, and the inner wall of shield body is equipped with limiting groove, and second sealing piece is fixedly arranged in limiting groove.

[0017] A kind of shield machine main drive system, the outer diameter of first sealing piece, connecting ring, main bearing and drive box is equal, so that first sealing piece, connecting ring, main bearing and drive box can slide in second sealing piece, and first sealing piece, connecting ring, main bearing and drive box are located on the same axial line.

[0018] A kind of shield machine main drive system, the inner diameter of connecting ring is greater than the inner diameter of first sealing piece, so that there is avoiding gap between connecting ring and flange body.

[0019] A tunnel boring machine (TBM) includes the aforementioned TBM main drive system.

[0020] Regarding the aforementioned background technology, the shield machine main drive system provided by the present invention can make the drive box slide inside the shield body through the telescopic component, and the cutterhead assembly is fixed on the drive box through the flange assembly and the main bearing, so that the cutterhead assembly can move inside the shield body. When it is necessary to change the cutterhead assembly, the telescopic component can be used to push the cutterhead assembly forward, thereby increasing the cutter changing space between the cutterhead assembly and the shield machine, which facilitates the operation of the operator and improves the cutter changing efficiency of the shield machine. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main drive system assembly of the tunnel boring machine provided in an embodiment of this application;

[0022] Figure 2 This is a partial cross-sectional structural diagram of the main drive system of the tunnel boring machine provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the main cross-sectional structure of the shield machine main drive system provided in the embodiments of this application;

[0024] Figure 4 This is a schematic diagram illustrating the working principle of the main drive system of the tunnel boring machine provided in an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the operation of the telescopic component provided in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the operation of the telescopic component provided in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of a flange assembly provided in an embodiment of this application.

[0028] in:

[0029] 1-Shield body, 2-Main drive system of tunnel boring machine, 3-Drive box, 4-Motor reducer, 5-Telescopic assembly, 6-Main bearing, 7-Anti-torsion assembly, 8-Flange body, 9-Working platform, 10-Sealing assembly

[0030] 31-Drive gear,

[0031] 41-Gear reducer, 42-Motor,

[0032] 51-Telescopic frame, 52-Cylinder base, 53-Telescopic cylinder,

[0033] 61 - Bearing outer ring, 62 - Bearing inner ring

[0034] 81-connection seat, 82-cabin, 83-hatch,

[0035] 91-first working platform, 92-second working platform, 93-third working platform,

[0036] 101-first sealing element, 102-second sealing element, 103-connection ring. DETAILED DESCRIPTION

[0037] The core of the present application is a shield machine main drive system, which improves the tool changing efficiency of the shield machine.

[0038] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0039] Referring to Figures 1-7 The shield machine main drive system 2 provided by the present application is used to be installed in the shield body 1, and the shield machine main drive system 2 comprises: a drive box 3 slidably arranged in the shield body 1, an external part of the drive box 3 is provided with a motor reducer 4 and an extension assembly 5, the drive box 3 can slide in and out of the shield body 1 through the extension assembly 5, a drive gear 31 is arranged in the drive box 3, the drive gear 31 is arranged in the drive box 3 through the arrangement of a bearing and a bearing sleeve, a driving shaft of the drive gear 31 is connected with the motor reducer 4, so that the drive gear 31 can rotate, the motor reducer 4 comprises a motor 42 and a speed reducer 41 which are coaxially fixedly connected, the speed reducer 41 is fixedly connected with the drive box 3 through a bolt set, and the speed reducer 41 is connected with the drive gear 31 through a spline shaft; a main bearing 6 is sleeved on the outer circumferential surface of the front end of the drive box 3, the main bearing 6 comprises a bearing outer ring 61 and a bearing inner ring 62, the bearing inner ring 62 can rotate relative to the bearing outer ring 61, and the bearing outer ring 61 is fixedly arranged on the front end outer wall of the drive box 3. Since the teeth of the drive gear 31 are exposed on the side wall of the drive box 3, and the inner wall of the bearing inner ring 62 is provided with a gear, the inner teeth of the bearing inner ring 62 are engaged with the drive gear 31. After the main bearing 6 is installed, the upper surface of the bearing outer ring 61 and the upper surface of the drive box 3 are located on the same horizontal plane, and the width of the bearing outer ring 61 is greater than the width of the bearing inner ring 62; a flange assembly is fixedly connected at one end to the front end outer wall of the bearing inner ring 62; a cutter head assembly is fixedly connected to the flange assembly, and under the driving action of the motor reducer 4, the cutter head assembly can rotate, thereby realizing the excavation of the shield machine; under the extension of the extension assembly 5, the cutter head assembly can extend in and out of the shield body 1, thereby facilitating the tool changing of the cutter head assembly.

[0040] The shield tunneling machine main driving system 2 provided by the application can make the driving box 3 extend and retract in the shield body 1 through the telescopic assembly 5, and the cutterhead assembly is fixed on the driving box 3 through the main bearing 6 and the flange assembly, so that the cutterhead assembly can move in the shield body 1 under the action of the telescopic assembly 5. When the cutterhead assembly needs to be replaced, the cutterhead assembly can be pushed forward by the telescopic assembly 5, so as to increase the replacement space between the cutterhead assembly and the shield machine, facilitate the operation of the operator, and improve the replacement efficiency of the shield machine.

[0041] In some embodiments, as shown in the accompanying drawings of the specification, Figure 2 The telescopic assembly 5 includes a telescopic frame 51, which is annular. One side of the telescopic frame 51 is detachably connected to the rear end face of the driving box 3, that is, the right end face of the driving box 3 through a bolt set. The other side of the telescopic frame 51 is arranged with a plurality of groups of oil cylinder seats 52 in the circumferential direction. In the embodiment of the application, the number of the oil cylinder seats 52 is 20. A telescopic oil cylinder 53 is hingedly connected to one end of the oil cylinder seat 52 and fixedly connected to the support frame of the shield body 1 at the other end.

[0042] In some embodiments, as shown in the accompanying drawings of the specification, Figures 2-3 The shield tunneling machine main driving system 2 further includes an anti-twist assembly 7, which is symmetrically arranged between the telescopic frame 51 and the inner wall of the shield body 1. One end of the anti-twist assembly 7 is fixedly connected to the outer circumferential surface of the telescopic frame 51, and the other end is slidably attached to the inner wall of the shield body 1. Since the anti-twist assembly 7 is a prior art, only the working principle of the anti-twist assembly 7 will be described. The anti-twist assembly 7 includes an anti-twist oil cylinder, which can move in the transverse direction and is limited to rotate in the radial direction. Since the cutterhead assembly of the shield machine will generate a counter torque during the process of rotating and cutting the soil body, the counter torque will make the shield tunneling machine main driving system 2 have a tendency to twist. The anti-twist assembly can transmit the torque from the telescopic frame 51 to the shield body 1 through the anti-twist oil cylinder when the torque acts, so as to realize the anti-twist function of the shield tunneling machine main driving system 2.

[0043] In some embodiments, as shown in the accompanying drawings of the specification, Figure 2 , 4As shown, the flange assembly comprises a flange body 8, the rear end face of the flange body 8 is fixedly connected to the front end face of the bearing inner ring 62 by a bolt set, that is, the right end face of the flange body 8 is fixedly connected to the left end face of the bearing inner ring 62 by a bolt set, and since the right end edge of the flange body 8 is provided with a convex circular table, the convex circular table is fixedly connected to the bearing inner ring 62 by a bolt set, thereby making the flange body 8 and the drive box 3 have a clearance, thereby avoiding the interference of the drive box 3 with the rotation of the flange body 8, and the front end face of the flange body 8 is provided with a plurality of groups of through mounting holes arranged in the circumferential direction of the front end face of the flange body 8, and the two sides of the mounting hole are respectively provided with a connecting seat 81 and a cabin 82 that are in communication with each other, that is, the left side of the mounting hole is provided with the connecting seat 81, and the cutter disc assembly is fixed to the flange assembly through the connecting seat 81, and the right side of the mounting hole is provided with a hatch 83, and the connecting seat 81 and the hatch 83 are in communication with each other through the mounting hole, and the hatch 83 and a ladder are arranged in the cabin 82, and the opening direction of the hatch 83 is toward the axial center line in the shield body 1; and the front end face of the flange body 8 is provided with a partition plate at the center position.

[0044] That is, the flange body 8 of the present application is provided with a connecting seat 81 and a cabin 82 that are in communication with each other, the connecting seat 81 is connected with the cutter disc assembly, so that the present application can enter the cutter disc assembly through the cabin 82 to change the cutter, and the number of mounting holes of the embodiment is 8 groups, that is, the number of the connecting seat 81 and the cabin 82 of the present application is 8 groups; the opening direction of the hatch 83 arranged in the cabin 82 is toward the axial center line in the shield body 1, which is convenient for the operator to enter the cabin 82 from the inside of the main drive system of the shield tunneling machine through the hatch 83.

[0045] In some embodiments, as described in the specification Figure 3As shown, the shield tunneling machine main drive system 2 is provided with a work platform 9, the work platform 9 comprises a first work platform 91, a second work platform 92 and a third work platform 93, the first work platform 91 is fixedly arranged on the bottom of the shield body 1, that is, the first mounting frame is symmetrically fixed on the inner wall of the shield body 1, and the first work platform 91 is horizontally fixed on the upper end of the first mounting frame; the second work platform 92 is fixedly arranged on the middle part of the shield body 1, that is, the second mounting frame is symmetrically fixed on the inner wall of the shield body 1, and the second work platform 92 is horizontally fixed on the upper end of the second mounting frame, the second work platform 92 is located above the first work platform 91, the height between the first work platform 91 and the second work platform 92 is H3, and H3 is not less than 1700mm; the third work platform 93 is fixedly arranged on the top of the shield body 1, that is, the third mounting frame is symmetrically fixed on the second work platform 92, and the third work platform 93 is horizontally fixed on the upper end of the third mounting frame, the height between the second work platform 92 and the third work platform 93 is H2, and H2 is not less than 1700mm; the height between the third work platform 93 and the cabin door 83 located directly above is H1, and H1 is not less than 1700mm; the first work platform 91, the second work platform 92 and the third work platform 93 are all used for opening the cabin door 83, and the shield tunneling machine main drive system has a tool changing position, when the shield tunneling machine main drive system is located at the tool changing position, the upper surface of the second work platform 92 is flush with the left and right cabin rooms 82, since the number of the cabin rooms 82 of the present application is 8 groups, the operator can enter into the cabin room 82 through the work platform 9, the cabin room 82 of the present application is a normal pressure cabin room, which is convenient for the operator to enter into the cutterhead assembly through the cabin room 82 to change the tool, thereby achieving that 8 groups of work positions can simultaneously work and improving the tool changing efficiency of the shield tunneling machine.

[0046] In some embodiments, as described in the specification Figure 4 As shown, the shield tunneling machine main drive system 2 further comprises a sealing assembly 10, the sealing assembly 10 comprises a first sealing member 101 and a second sealing member 102, and the first sealing member 101 and the second sealing member 102 are both annular rubber sealing rings; the first sealing member 101 is sleeved on the outer circumferential surface of the flange body 8, and a connecting ring 103 is fixedly arranged on the side of the first sealing member 101 facing the main bearing 6, that is, the right side of the first sealing member 101 is fixedly connected with the connecting ring 103 through a bolt group, and the other side of the connecting ring 103 is fixedly arranged on the front end surface of the bearing outer ring 61 through a bolt group, so that the first sealing member 101 is fixedly connected with the bearing outer ring 61; the second sealing member 102 is located between the first sealing member 101 and the inner wall of the shield body 1, and extends in the direction towards the connecting ring 103, that is, the second sealing member 102 extends in the right direction, so that the connecting ring 103, the bearing outer ring 61 and the drive box 3 are located in the second sealing member 102, the inner wall of the shield body 1 is provided with a limiting groove, and the second sealing member 102 is fixedly arranged in the limiting groove through a bolt group, thereby avoiding the movement of the second sealing member 102.

[0047] In some embodiments, as shown in the accompanying drawings Figures 4-6 The outer diameters of the first seal 101, the connecting ring 103, the main bearing 6 and the drive box 3 are equal, so that the first seal 101, the connecting ring 103, the main bearing 6 and the drive box 3 can slide in the second seal 102, and the first seal 101, the connecting ring 103, the main bearing 6 and the drive box 3 are located on the same axis.

[0048] That is, the telescopic assembly 5 can make the first seal 101, the connecting ring 103, the main bearing 6, the drive box 3 and the flange assembly extend and retract a set distance S in the shield body 1. When the telescopic assembly 5 extends to the left by the set distance S, the telescopic frame 51 of the telescopic assembly 5 contacts the inner wall of the shield body 1, and then the telescopic assembly 5 stops working, thereby achieving the extension and retraction of the drive tool changing assembly in the sealed state, preventing the entry of external water and mud.

[0049] In some embodiments, the inner diameter of the connecting ring 103 is greater than the inner diameter of the first seal 101, so that there is a clearance between the connecting ring 103 and the flange body 8, that is, there is a clearance between the connecting ring 103 and the flange body 8, thereby preventing the connecting ring 103 from interfering with the flange body 8 when the flange body 8 rotates.

[0050] A shield tunneling machine includes the shield tunneling machine main drive system described above.

[0051] It should be noted that in the present specification, relational terms such as first and second and the like are used solely to distinguish one entity from another entity, without necessarily requiring or implying any such actual relationship or order between such entities.

[0052] The above has carried on the detailed introduction to the shield tunneling machine main drive system and the shield tunneling machine provided by the present application. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A main drive system for a tunneling machine, for installation in a shield body (1), characterized in that The shield tunneling machine main drive system (2) comprises: A drive box (3) is slidably arranged in the shield body (1), and the outer portion of the drive box (3) is provided with a motor reducer (4) and an extension assembly (5). The motor reducer (4) is connected with a drive gear (31) arranged in the drive box (3); A main bearing (6) is sleeved on the outer circumferential surface of the front end of the drive box (3). The main bearing (6) comprises a bearing outer ring (61) and a bearing inner ring (62). The bearing outer ring (61) is fixedly arranged on the front end outer wall of the drive box (3). The bearing inner ring (62) is rotatable relative to the bearing outer ring (61). The inner teeth of the bearing inner ring (62) are engaged with the drive gear (31); A flange assembly is fixedly arranged on the front end outer wall of the bearing inner ring (62); A cutter head assembly is fixedly arranged on the flange assembly, and is used to rotate under the driving action of the motor reducer (4) and to extend and retract in the shield body (1) under the extension and retraction of the extension assembly (5); The flange assembly comprises a flange body (8). The rear end surface of the flange body (8) is fixed on the front end surface of the bearing inner ring (62), and an avoiding gap is arranged between the rear end surface of the flange body (8) and the front end surface of the drive box (3). A plurality of groups of through mounting holes are arranged on the front end surface of the flange body (8) in the circumferential direction. Connection seats (81) and cabins (82) which are in communication with each other are arranged on both sides of the mounting holes; The cabin (82) is provided with a hatch (83). The opening direction of the hatch (83) is towards the axial center line in the shield body (1); The shield tunneling machine main drive system (2) further comprises a sealing assembly (10). The sealing assembly (10) comprises a first sealing member (101) and a second sealing member (102). The first sealing member (101) is sleeved on the outer circumferential surface of the flange body (8). A connecting ring (103) is fixedly arranged on the side of the first sealing member (101) which faces the main bearing (6). The other side of the connecting ring (103) is fixedly arranged on the front end surface of the bearing outer ring (61), so that the first sealing member (101) is fixedly connected with the bearing outer ring (61). The second sealing member (102) is located between the first sealing member (101) and the inner wall of the shield body (1). The second sealing member (102) extends in the direction towards the connecting ring (103), so that the connecting ring (103), the bearing outer ring (61) and the drive box (3) are located in the second sealing member (102). The inner wall of the shield body (1) is provided with a limiting groove. The second sealing member (102) is fixedly arranged in the limiting groove.

2. The shield machine main drive system according to claim 1, characterized in that, The extension assembly (5) comprises: An extension frame (51) is annular. One side of the extension frame (51) is fixedly arranged on the rear end surface of the drive box (3). The other side of the extension frame (51) is arranged with a plurality of groups of oil cylinder seats (52) in the circumferential direction; A telescopic oil cylinder (53) is hingedly connected to the oil cylinder seat (52) at one end and fixedly connected to a support frame in the shield body (1) at the other end.

3. The shield machine main drive system according to claim 2, characterized in that: The shield machine main drive system (2) further comprises an anti-twist assembly (7) symmetrically arranged between the telescopic frame (51) and the inner wall of the shield body (1), one end of the anti-twist assembly (7) being fixedly connected to the outer circumferential surface of the telescopic frame (51) and the other end being slidably attached to the inner wall of the shield body (1).

4. The shield machine main drive system of claim 1, wherein: An operation platform (9) is arranged in the shield machine main drive system, the operation platform (9) comprising a first operation platform (91), a second operation platform (92) and a third operation platform (93), the first operation platform (91) being fixedly arranged at the bottom of the shield body (1), the second operation platform (92) being fixedly arranged at the middle of the shield body (1), and the third operation platform (93) being fixedly arranged at the top of the shield body (1), the first operation platform (91), the second operation platform (92) and the third operation platform (93) being used to open the hatch (83).

5. The shield machine main drive system of claim 1, wherein: The outer diameters of the first sealing member (101), the connecting ring (103), the main bearing (6) and the drive box (3) are equal, so that the first sealing member (101), the connecting ring (103), the main bearing (6) and the drive box (3) can slide in the second sealing member (102), and the first sealing member (101), the connecting ring (103), the main bearing (6) and the drive box (3) are located on the same axis.

6. The shield machine main drive system according to claim 5, characterized in that: The inner diameter of the connecting ring (103) is greater than the inner diameter of the first sealing member (101), so that there is a clearance between the connecting ring (103) and the flange body (8).

7. A tunneling machine characterized by, The shield machine comprises the shield machine main drive system according to any one of claims 1-6.

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