Joint bearing for heading machine and heading machine

Abstract

The bearing comprises an inner ring used for being matched with a main supporting shaft of the heading machine and an outer ring arranged on the outer side of the inner ring in a sleeving mode, the inner ring and the outer ring are in contact connection through a spherical surface, a cavity is formed between the inner ring and the outer ring, and a gear pair is arranged in the cavity. The gear pair comprises a gear connected with the inner ring and a gear sleeve connected with the outer ring, and the gear is matched with the gear sleeve to transmit torque between the inner ring and the outer ring; the heading machine uses the knuckle bearing as a connecting piece of a gripper shoe assembly and a main supporting shaft. The inner ring and the outer ring of the knuckle bearing are connected through a gear pair and an inner spherical surface and outer spherical surface contact mode, compared with the mode that torque is transmitted through pure spherical surface contact and sliding friction, swing of a certain angle can be achieved, high torque can be better borne, and meanwhile the torque is transmitted; the strength of the whole system of the gripper shoe assembly and the knuckle bearing can be guaranteed, and the situations of breakage, relative rotation and abrasion of the knuckle bearing are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to a spherical bearing for a tunnel boring machine and a tunnel boring machine. Background Art

[0002] With the development of underground space, more and more underground projects require vertical drilling. Compared with traditional drilling methods, the use of vertical shaft boring machines has many advantages, such as high efficiency, safe production, good well quality, high degree of mechanization, low construction cost, and the ability to cope with various terrains. When the boring machine is drilling, the main drive system rotates with the cutter head below, and the connecting parts above the main drive system will be subject to a high counter-torque. As the excavation diameter increases and the depth deepens, the boring machine required will also generate a larger torque. If the connection support part cannot be guaranteed to withstand a large torque, it may cause the entire boring machine to excavate abnormally, resulting in serious consequences. The connection support part above the main drive system of the boring machine is usually provided with a joint bearing to adapt to the angle change during the excavation process. At the joint bearing, the counter-torque force generated during the excavation process is mainly offset by the friction between the inner and outer rings of the joint bearing. It is difficult to withstand a large torque, which affects the overall strength of the support system. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the existing tunnel boring machine has insufficient support system strength and is prone to relative rotation when used under large diameter and high depth conditions. The present invention provides a spherical bearing for a tunnel boring machine and a tunnel boring machine.

[0004] The specific technical solutions adopted by the present invention to solve the above technical problems are as follows: A spherical bearing for a tunnel boring machine comprises an inner ring for cooperating with a main support shaft of the tunnel boring machine and an outer ring sleeved on the outer side of the inner ring. The inner ring and the outer ring are connected by spherical contact, and a cavity is provided between the two. A gear pair is arranged in the cavity. The gear pair comprises a gear connected to the inner ring and a gear sleeve connected to the outer ring. The gear cooperates with the gear sleeve to transmit torque between the inner ring and the outer ring.

[0005] Further, along the axial direction, the gear and the gear sleeve are clearance-matched, or the matching parts of the gear and the gear sleeve at the upper and lower end surfaces are arc-shaped to adapt to the spherical surface of the outer ring.

[0006] Furthermore, the gears are drum-shaped gears.

[0007] Furthermore, the outer ring includes a first outer ring and a second outer ring with an L-shaped cross section. The first outer ring and the second outer ring are fixedly connected to form a cavity inside the second outer ring.

[0008] Furthermore, a first annular groove is provided on the ball contact surface of the outer ring located on the upper side of the cavity, a second annular groove is provided on the ball contact surface of the outer ring located on the lower side of the cavity, and a first lubricating oil channel communicating with the first annular groove and a second lubricating oil channel communicating with the second annular groove are also provided in the outer ring.

[0009] Furthermore, a third annular groove is formed between the upper outer wall of the gear sleeve and the upper inner wall of the cavity, and a fourth annular groove is formed between the lower outer wall of the gear sleeve and the lower inner wall of the cavity.

[0010] Furthermore, a third lubricating oil channel communicating with the third ring groove is provided in the outer ring.

[0011] Furthermore, the cross section of the inner hole on the inner ring for mounting the main support shaft is rectangular.

[0012] Furthermore, end face sealing assemblies are provided at the connection between the upper end face of the outer ring and the inner ring, as well as at the connection between the lower end face of the outer ring and the inner ring; the end face sealing assembly includes a compression ring, which is connected to the outer ring by a compression ring screw, and an annular groove is opened on the end face of the compression ring in contact with the inner ring, a double O-ring is provided at the bottom of the groove, and a second sealing ring is also provided between the double O-ring and the inner ring.

[0013] A tunnel boring machine comprises the above-mentioned spherical bearing for the tunnel boring machine, wherein the inner ring is slidably mounted on the main supporting shaft, and the outer ring is connected to a support shoe assembly for supporting on the inner wall of the well.

[0014] The beneficial effects of the present invention are: 1. The inner ring and outer ring of the spherical bearing are connected by a gear pair and inner and outer spherical contact. Compared with simple spherical contact, the method of transmitting torque by sliding friction can not only use spherical contact to achieve a certain angle of swing, but also better withstand higher torque through the gear pair.

[0015] 2. Further use of drum-shaped teeth and gear sleeves as gear pairs can reduce the side clearance between teeth and avoid high-intensity impact; annular grooves are arranged on the upper and lower sides of the gear pair to ensure that there will be no interference when the angle of the inner ring axis of the spherical bearing changes relative to the outer ring axis.

[0016] 3. The main support shaft of the tunnel boring machine transmits the torque to the support shoe assembly through the spherical bearing to offset the torque. The cutter head and main drive system of the tunnel boring machine can also make small angle turns driven by the spherical bearing. During operation, the strength of the entire system of the support shoe assembly and the spherical bearing can be guaranteed to avoid the breakage, relative rotation and wear of the spherical bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 The cross-sectional view of the spherical bearing for the tunnel boring machine of the present invention Figure 1 ; Figure 2 The cross-sectional view of the spherical bearing for the tunnel boring machine of the present invention Figure 2 ; Figure 3 The cross-sectional view of the spherical bearing for the tunnel boring machine of the present invention Figure 3 ; Figure 4 is a cross-sectional view of the end face sealing assembly of the present invention; Figure 5 This is a schematic diagram of the installation of the spherical bearing for the tunnel boring machine according to the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the installation of the spherical bearing for the tunnel boring machine according to the present invention. Figure 2 .

[0019] In the figure: 1. Cutter disc; 2. Main drive system; 3. Main support shaft; 4. Support shoe assembly; 5. Inner ring; 5.1. Gear; 6. Outer ring; 6.1. First outer ring; 6.11. First lubricating oil channel; 6.12. First ring groove; 6.2. Second outer ring; 6.21. Second lubricating oil channel; 6.22. Second ring groove; 6.23. Third lubricating oil channel; 6.24. Third ring groove; 6.25. Fourth ring groove; 6.26. Gear sleeve; 6.3. Connecting screw; 7. End face seal assembly; 7.1. Pressure ring; 7.2. Double O-ring; 7.3. Pressure ring screw; 7.4. First seal ring; 7.5. Second seal ring. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] The present invention provides the following specific embodiments: First, as Figure 1-4 As shown, the present invention provides a spherical bearing for a tunnel boring machine, comprising an inner ring 5 for matching a main support shaft 3 of the tunnel boring machine and an outer ring 6 sleeved on the outer side of the inner ring 5, the inner ring 5 and the outer ring 6 are connected by spherical contact to form a clearance fit, and a cavity is provided between the two, a gear pair is arranged in the cavity, the gear pair comprises a gear 5.1 and a gear sleeve 6.26 meshing with the gear 5.1, the gear 5.1 and the inner ring 5 are integrally formed, the gear sleeve 6.26 and the outer ring 6 are integrally formed, the gear 5.1 and the gear sleeve 6.26 are matched to transmit torque between the inner ring 5 and the outer ring 6; the inner ring 5 and the outer ring 6 are connected by two matching modes: the gear pair and the spherical clearance fit, which can achieve a certain angle of swing, and can also better withstand and transmit higher torque.

[0022] Furthermore, viewed in the axial direction, there is a clearance fit between the gear 5.1 and the gear sleeve 6.26, so that the axis of the inner ring 5 can be deflected relative to the axis of the outer ring 6; in addition, the upper end face of the gear 5.1 can also be fitted with the upper inner wall surface of the gear sleeve 6.26, and the lower end face of the gear 5.1 can be fitted with the lower inner wall surface of the gear sleeve 6.26. At this time, the upper and lower end faces of the gear 5.1 and the upper and lower inner wall surfaces of the gear sleeve 6.26 are set to be arcs concentric with the spherical surface of the outer ring 6 to allow the axis of the inner ring 5 to deflect relative to the axis of the outer ring 6.

[0023] Furthermore, the gear 5.1 is a drum-shaped tooth, which can reduce the backlash between teeth and avoid high-intensity impact.

[0024] Furthermore, the cavity is annular, and the outer ring 6 includes a first outer ring 6.1 and a second outer ring 6.2 with an L-shaped cross-section. The first outer ring 6.1 and the second outer ring 6.2 are fixedly connected by connecting screws 6.3. A third sealing ring and a fourth sealing ring coaxially arranged with the third sealing ring are also provided on the contact surfaces of the first outer ring 6.1 and the second outer ring 6.2. The connecting screws 6.3 are located between the third sealing ring and the fourth sealing ring. In addition, a plurality of positioning pins for splicing the first outer ring 6.1 and the second outer ring 6.2 are provided between the third sealing ring and the fourth sealing ring.

[0025] Furthermore, a first annular groove 6.12 is provided on the ball contact surface of the outer ring 6 located on the upper side of the cavity, and a second annular groove 6.22 is provided on the ball contact surface of the outer ring 6 located on the lower side of the cavity. A first lubricating oil channel 6.11 communicating with the first annular groove 6.12 and a second lubricating oil channel 6.21 communicating with the second annular groove 6.22 are also provided in the outer ring 6. The lubricating oil flows to the first annular groove 6.12 and the second annular groove 6.22. The first annular groove 6.12 and the second annular groove 6.22 can store oil to ensure that the spherical gap between the outer ring 6 and the inner ring 5 is fully lubricated.

[0026] Furthermore, a third annular groove 6.24 is formed between the upper outer wall of the gear sleeve 6.26 and the upper inner wall of the cavity, and a fourth annular groove 6.25 is formed between the lower outer wall of the gear sleeve 6.26 and the lower inner wall of the cavity. The third annular groove 6.24 and the fourth annular groove 6.25 can ensure that no interference occurs when the axis of the inner ring 5 changes angle relative to the axis of the outer ring 6.

[0027] Furthermore, a third lubricating oil passage 6.23 communicating with the third annular groove 6.24 is provided in the outer ring 6, and the lubricating oil enters the third annular groove 6.24 through the third lubricating oil passage 6.23 to ensure good lubrication of the gear pair. The first lubricating oil passage 6.11, the second lubricating oil passage 6.21 and the third lubricating oil passage 6.23 are connected, and lubricating oil can be injected into the first annular groove 6.12, the second annular groove 6.22 and the third annular groove 6.24 at the same time.

[0028] Furthermore, the cross section of the inner hole on the inner ring 5 for mounting the main support shaft 3 is rectangular, and correspondingly, the cross section of the main support shaft 3 is rectangular, so as to prevent the relative rotation between the hole and the shaft.

[0029] Furthermore, end face sealing assemblies 7 are provided at the connection between the upper end face of the outer ring 6 and the inner ring 5, as well as at the connection between the lower end face of the outer ring 6 and the inner ring 5; the end face sealing assembly 7 comprises a pressure ring 7.1, which is connected to the outer ring 6 by a pressure ring screw 7.3, and a first sealing ring 7.4 is provided between the pressure ring 7.1 and the outer ring 6, and the pressure ring screw 7.3 is located outside the first sealing ring 7.4, and an annular groove is provided on the end face of the pressure ring 7.1 in contact with the inner ring 5, and a double O-ring 7.2 is provided at the bottom of the annular groove, and a second sealing ring 7.5 is provided between the double O-ring 7.2 and the inner ring 5, which ensures the downward pressure of the second sealing ring 7.5 on the outer spherical surface of the inner ring 5 and facilitates the replacement of the seal.

[0030] Furthermore, the amount of oil injected into the spherical bearing cavity needs to reach a certain pressure, which can effectively prevent impurities from entering in the event of seal failure.

[0031] Second, as Figure 5-6 As shown, the present invention provides a roadheader, comprising the above-mentioned spherical bearing for roadheader, a cutterhead 1, a main drive system 2, a main support shaft 3 and a shoe assembly 4 for supporting the inner wall of the shaft, the cutterhead 1 is installed at the output end of the main drive system 2, the main drive system 2 is rigidly connected to the main support shaft 3, and the main drive system 2 uses the main support shaft 3 as a support to drive the cutterhead 1 to rotate and dig. When installing the spherical bearing, the inner ring 5 is slidably installed on the main support shaft 3 through the pulley and the track, and the outer ring 6 is fixedly connected to the shoe assembly 4 through 60 M30 mounting bolts.

[0032] The anti-torque force generated by the main drive system 2 is transmitted to the support shoe assembly 4 through the main support shaft 3 and the spherical bearing. The support shoe assembly 4 applies a radial load to the well wall through the hydraulic cylinder to offset the anti-torque force and ensure stable support.

[0033] The inner ring 5 and outer ring 6 of the spherical bearing are connected by a gear pair and inner and outer spherical contact. Compared with simple spherical contact, the torque is transmitted by sliding friction, which can not only achieve a certain angle of swing, but also better withstand higher torque and transmit torque at the same time; further use of drum teeth and gear sleeves as gear pairs can reduce the side clearance between teeth and avoid high-intensity impact; annular grooves are arranged on the upper and lower sides of the gear pair to ensure that there will be no interference when the axis of the inner ring 5 of the spherical bearing changes angle relative to the axis of the outer ring 6.

[0034] The main support shaft 3 of the tunnel boring machine transmits the torque to the support shoe assembly 4 through the spherical bearing to offset the torque. The tunnel boring machine cutter head 1 and the main drive system 2 can also make small angle turns driven by the spherical bearing. During operation, the strength of the entire system of the support shoe assembly 4 and the spherical bearing can be guaranteed to avoid the occurrence of spherical bearing breakage, relative rotation and wear.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A spherical bearing for a tunnel boring machine, characterized in that: The invention comprises an inner ring (5) for cooperating with a main support shaft (3) of a tunnel boring machine and an outer ring (6) sleeved on the outer side of the inner ring (5); the inner ring (5) and the outer ring (6) are connected by spherical contact, and a cavity is provided between the inner ring (5) and a gear pair is arranged in the cavity; the gear pair comprises a gear (5.1) connected to the inner ring (5) and a gear sleeve (6.26) connected to the outer ring (6); the gear (5.1) and the gear sleeve (6.26) cooperate to transmit torque between the inner ring (5) and the outer ring (6).

2. The spherical bearing for a tunnel boring machine according to claim 1, characterized in that: In the axial direction, the gear (5.1) and the gear sleeve (6.26) are clearance-fitted, or the matching parts of the gear (5.1) and the gear sleeve (6.26) on the upper and lower end surfaces are adapted to the arc shape of the spherical surface of the outer ring (6).

3. The spherical bearing for a tunnel boring machine according to claim 1, characterized in that: The gear (5.1) is a drum-shaped gear.

4. The spherical bearing for a tunnel boring machine according to claim 1, characterized in that: The outer ring (6) comprises a first outer ring (6.1) and a second outer ring (6.2) having an L-shaped cross section, the first outer ring (6.1) and the second outer ring (6.2) are fixedly connected, and the cavity is formed inside the second outer ring (6.2).

5. The spherical bearing for a tunnel boring machine according to claim 1, characterized in that: A first annular groove (6.12) is provided on the ball contact surface of the outer ring (6) located on the upper side of the cavity, a second annular groove (6.22) is provided on the ball contact surface of the outer ring (6) located on the lower side of the cavity, and a first lubricating oil passage (6.11) communicating with the first annular groove (6.12) and a second lubricating oil passage (6.21) communicating with the second annular groove (6.22) are also provided in the outer ring (6).

6. The spherical bearing for a tunnel boring machine according to claim 1, characterized in that: A third annular groove (6.24) is formed between the upper outer wall of the gear pair and the upper inner wall of the cavity, and a fourth annular groove (6.25) is formed between the lower outer wall of the gear pair and the lower inner wall of the cavity.

7. The spherical bearing for a tunnel boring machine according to claim 6, characterized in that: A third lubricating oil passage (6.23) communicating with the third annular groove (6.24) is also provided in the outer ring (6).

8. The spherical bearing for a tunnel boring machine according to claim 1, characterized in that: The cross section of the inner hole on the inner ring (5) for mounting the main support shaft (3) is rectangular.

9. The spherical bearing for a tunnel boring machine according to claim 1, characterized in that: An end face sealing assembly (7) is provided at the connection between the upper end face of the outer ring (6) and the inner ring (5) and at the connection between the lower end face of the outer ring (6) and the inner ring (5); the end face sealing assembly (7) comprises a pressure ring (7.1), the pressure ring (7.1) and the outer ring (6) are connected by a pressure ring screw (7.3), an annular groove is formed on the end face of the pressure ring (7.1) in contact with the inner ring (5), a double O-ring (7.2) is provided at the bottom of the annular groove, and a second sealing ring (7.5) is provided between the double O-ring (7.2) and the inner ring (5).

10. A roadheader, characterized in that: The invention comprises a spherical bearing for a tunnel boring machine as claimed in any one of claims 1 to 9, wherein during installation, the inner ring (5) is slidably mounted on the main support shaft (3), and the outer ring (6) is connected to a support shoe assembly (4) for supporting on the inner wall of the shaft.

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