Main bearing of heading machine and tunnel heading machine

Abstract

This invention provides a main bearing for a tunnel boring machine (TBM) and a TBM. The main bearing includes an inner ring, an outer ring, a cage, rollers, and a replacement part. The outer ring is fitted over the inner ring, and the cage is circumferentially positioned between the inner and outer rings. The rollers are mounted on the cage. An arc-shaped notch is formed circumferentially on the outer ring to expose the cage and rollers corresponding to the notch along the radial direction of the bearing. The replacement part is detachably filled into the notch, and an observation hole is formed radially on the replacement part. An image acquisition unit is installed in the observation hole, with its lens facing the cage and rollers corresponding to the notch. The image acquisition unit is used to acquire image data of the cage and rollers corresponding to the notch. This invention provides a main bearing for a TBM and a TBM, enabling accurate monitoring of the operating status of the main bearing.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machines, and more particularly to a main bearing for a tunnel boring machine and a tunnel boring machine. Background Technology

[0002] The main bearing of a tunneling machine is one of the core components of the machine, and its condition has a significant impact on the overall operation of the machine.

[0003] In existing technologies, the condition of the tunneling machine's main bearing is generally monitored indirectly by analyzing the oil in the bearing and observing the vibration of the bearing. Specifically, oil analysis can roughly determine the generation of particles and oil contamination in the lubricating oil inside the main bearing, thereby indirectly controlling the overall operation of the main bearing. Vibration analysis can indirectly determine whether any components have malfunctioned, thus roughly controlling the operating status of the various components inside the main bearing.

[0004] However, the accuracy of monitoring the operating condition of the main bearing of the tunneling machine using the above methods is relatively low. Summary of the Invention

[0005] To address at least one of the problems mentioned in the background art, the present invention provides a main bearing for a tunnel boring machine and a tunnel boring machine, which can achieve accurate monitoring of the operating status of the main bearing of the tunnel boring machine.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides a main bearing for a tunneling machine, comprising an inner ring, an outer ring, a cage, rollers, and alternative parts, wherein the outer ring is sleeved outside the inner ring, the cage is disposed circumferentially between the inner ring and the outer ring, and the rollers are installed inside the cage;

[0008] The outer ring has an arc-shaped notch along the circumference to show the cage and rollers corresponding to the notch along the radial direction of the bearing. The replacement part is removably filled into the notch, and the replacement part has an observation hole along the radial direction of the bearing.

[0009] An image acquisition unit is installed in the observation hole. The lens of the image acquisition unit is directed towards the cage and rollers corresponding to the notch. The image acquisition unit is used to acquire image data of the cage and rollers corresponding to the notch in order to determine the working status of the cage and rollers based on the image data.

[0010] As an alternative implementation, the alternative component also has an illumination hole along the radial direction of the bearing, and an illumination lamp is installed in the illumination hole. The illumination lamp is configured to illuminate the cage and rollers corresponding to the notch.

[0011] As an optional implementation, the outer ring includes a first outer ring and a second outer ring, which are spliced ​​together along the bearing axial direction to form the outer ring. A portion of the notch is located in the first outer ring, and the other portion of the notch is located in the second outer ring. The cage includes a main thrust cage, a radial cage, and an auxiliary thrust cage arranged sequentially and spaced apart along the bearing axial direction. The main thrust cage is located between the inner ring and the first outer ring, and the radial cage and the auxiliary thrust cage are located between the inner ring and the second outer ring.

[0012] As an optional implementation, the roller includes a main push roller, a radial roller, and an auxiliary push roller. The main push roller is mounted on a main push cage, the radial roller is mounted on a radial cage, and the auxiliary push roller is mounted on an auxiliary push cage. The axial directions of the main push roller and the auxiliary push roller are perpendicular to the axial direction of the bearing, and the axial direction of the radial roller is aligned with the axial direction of the bearing.

[0013] As an optional implementation, the illumination holes include a first illumination hole, a second illumination hole, and a third illumination hole spaced apart along the bearing axial direction, and the observation holes include a first observation hole, a second observation hole, and a third observation hole spaced apart along the bearing axial direction; along the bearing axial direction, the first illumination hole, the second illumination hole, and the third illumination hole correspond one-to-one with the positions of the main thrust retainer, the radial retainer, and the auxiliary thrust retainer, respectively, and the first observation hole, the second observation hole, and the third observation hole correspond one-to-one with the positions of the main thrust retainer, the radial retainer, and the auxiliary thrust retainer, respectively.

[0014] As an optional implementation, the main pusher cage, radial cage, and auxiliary pusher cage all include a multi-segment arc-shaped frame, with the arc of the notch not exceeding 180° and the arc of the notch being greater than or equal to the largest arc in the frame.

[0015] As an optional implementation, the system also includes a controller and an alarm. The lighting, the image acquisition unit, and the alarm are all electrically connected to the controller. The controller is configured to determine whether the cage and rollers have failed based on the image data acquired by the image acquisition unit, and to control the alarm to issue an alarm signal when the cage or rollers fail, so as to remind maintenance personnel to replace the cage and rollers through the notch.

[0016] As an alternative implementation, there is a gap between the replacement part and the roller.

[0017] As an alternative implementation, the substitute is a rubber product.

[0018] In a second aspect, the present invention also provides a tunnel boring machine, including any of the tunnel boring machine main bearings in the first aspect.

[0019] The main bearing for a tunneling machine provided by this invention includes an inner ring, an outer ring, a cage, rollers, and a replacement part. The outer ring is fitted outside the inner ring, the cage is circumferentially disposed between the inner and outer rings, and the rollers are installed inside the cage. The outer ring has an arc-shaped notch along its circumferential direction to expose the cage and rollers at the location corresponding to the notch along the radial direction of the bearing. The replacement part is detachably filled into the notch, and an observation hole is provided on the replacement part along the radial direction of the bearing. An image acquisition unit is provided in the observation hole, and the lens of the image acquisition unit is directed towards the cage and rollers at the location corresponding to the notch. The image acquisition unit is used to acquire image data of the cage and rollers at the location corresponding to the notch to determine the working state of the cage and rollers based on the image data.

[0020] The tunneling machine main bearing provided by this invention features a notch on its outer ring, a removable replacement part filled at the notch, and radial observation holes on the replacement part. An image acquisition unit is installed in the observation holes. The image acquisition unit can clearly capture image data of the rollers and cage exposed at the notch. By observing and analyzing the acquired image data, it is possible to determine whether the cage and rollers have malfunctioned and the specific location of the malfunction, thereby achieving precise monitoring of the tunneling machine main bearing's operating status. Furthermore, when a malfunction is detected in the rollers or cage, workers can quickly replace the cage and rollers through the notch by removing the replacement part. After repair, the replacement part can be refilled. The operation is very convenient and greatly improves the maintenance efficiency of the tunneling machine main bearing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a first structure of a tunneling machine main bearing provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a second structure of a tunneling machine main bearing provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of a replacement component in the main bearing of a tunneling machine, provided by an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the structure of a cage in the main bearing of a tunneling machine, provided as an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100 - Main bearing of tunneling machine;

[0028] 110 - Inner circle;

[0029] 120 - Outer ring;

[0030] 121 - First outer ring;

[0031] 122 - Second outer ring;

[0032] 130 - Cage;

[0033] 131 - Main support cage;

[0034] 132 - Radial cage;

[0035] 133-Auxiliary push cage;

[0036] 140-roller;

[0037] 141 - Main push roller;

[0038] 142 - Radial roller;

[0039] 143 - Auxiliary push roller;

[0040] 150 - Alternative Part;

[0041] 151-lighting hole;

[0042] 1511 - First illumination hole;

[0043] 1512 - Second illumination hole;

[0044] 1513 - Third illumination hole;

[0045] 152 - Observation Hole;

[0046] 1521 - First observation hole;

[0047] 1522 - Second observation hole;

[0048] 1523 - Third observation well. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or to be constructed and operated in a specific orientation.

[0051] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0052] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0053] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0054] In existing technologies, the condition of a tunneling machine's main bearing is generally monitored indirectly by analyzing the oil in the bearing and observing its vibration. Specifically, oil analysis can roughly determine the generation of particles and oil contamination in the lubricating oil inside the main bearing, thus indirectly controlling the overall operation of the bearing. Vibration analysis can indirectly reveal whether any components have malfunctioned, thus providing a general overview of the operating status of the internal parts of the main bearing. However, monitoring the operating condition of the main bearing using these methods has relatively low accuracy.

[0055] In view of this, the present invention provides a main bearing for a tunneling machine, comprising an inner ring, an outer ring, a cage, rollers, and a replacement part. The outer ring is fitted over the inner ring, the cage is circumferentially disposed between the inner and outer rings, and the rollers are mounted on the cage. An arc-shaped notch is formed circumferentially on the outer ring to expose the cage and rollers at the radial position corresponding to the notch. The replacement part is detachably filled into the notch, and an observation hole is formed radially on the replacement part. An image acquisition unit is installed in the observation hole. The main bearing for a tunneling machine provided by the present invention, by forming a notch on the outer ring, filling the notch with a detachable replacement part, and forming a radial observation hole on the replacement part, and installing an image acquisition unit in the observation hole, allows for clear acquisition of image data of the rollers and cage exposed at the notch. By observing and analyzing the acquired image data, it is possible to determine whether the cage and rollers have malfunctioned and the specific location of the malfunction, thereby achieving precise monitoring of the operating status of the main bearing for the tunneling machine.

[0056] Figure 1 This is a schematic diagram of a first structure of a tunneling machine main bearing provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a second structure of a tunneling machine main bearing provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a replacement component in the main bearing of a tunneling machine, provided by an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of a cage in the main bearing of a tunneling machine, provided as an embodiment of the present invention.

[0057] You can refer to this. Figures 1 to 4 This invention provides a main bearing 100 for a tunneling machine, including an inner ring 110, an outer ring 120, a cage 130, rollers 140, and a replacement part 150. The outer ring 120 is sleeved outside the inner ring 110. The cage 130 is circumferentially disposed between the inner ring 110 and the outer ring 120, and the rollers 140 are mounted on the cage 130. The outer ring 120 has an arc-shaped notch circumferentially to expose the cage 130 and rollers 140 at the radial position of the bearing corresponding to the notch. The replacement part 150 is detachably filled in the notch. An observation hole 152 is provided on the replacement part 150 along the radial position of the bearing. An image acquisition unit is provided in the observation hole 152. The lens of the image acquisition unit is directed towards the cage 130 and rollers 140 at the position corresponding to the notch. The image acquisition unit is used to acquire image data of the cage 130 and rollers 140 at the position corresponding to the notch, so as to determine the working state of the cage 130 and rollers 140 based on the image data.

[0058] The replacement part 150 may also have an illumination hole 151 along the radial direction of the bearing; an illumination lamp is installed in the illumination hole 151, and the illumination lamp is configured to illuminate the cage 130 and roller 140 corresponding to the notch, thereby improving the clarity of the image acquired by the image acquisition unit. The image acquisition unit may specifically be a camera.

[0059] A gap can be provided between the replacement part 150 and the roller 140 to avoid interference with the operation of the roller 140. The replacement part 150 can be made of rubber to facilitate the making of holes in the replacement part 150. Specifically, the replacement part 150 can be removably filled into the gap by means of snap-fit, adhesive, or threaded connection.

[0060] It should be noted that, as Figure 2 As shown, the width of the notch along the axial direction of the main bearing 100 of the tunneling machine is no greater than the width of the outer ring 120 along the axial direction of the main bearing 100 of the tunneling machine, and the notch is located at the middle position of the outer ring 120 along the axial direction of the main bearing 100 of the tunneling machine, so as to minimize the impact of the notch on the operation of the main bearing 100 of the tunneling machine.

[0061] Specifically, the outer ring 120 may include a first outer ring 121 and a second outer ring 122. The first outer ring 121 and the second outer ring 122 are spliced ​​together along the axial direction of the bearing to form the outer ring 120. A portion of the notch is located in the first outer ring 121, and the other portion of the notch is located in the second outer ring 122. The first outer ring 121 and the second outer ring 122 can be connected by bolts arranged radially, and, as... Figure 1 As shown, the first outer ring 121 and the second outer ring 122 can extend to opposite sides of the outer ring 120 along the axial direction to bear axial loads. The cage 130 may include a main thrust cage 131, a radial cage 132, and an auxiliary thrust cage 133 arranged sequentially at intervals along the bearing axial direction. The main thrust cage 131 is disposed between the inner ring 110 and the first outer ring 121, and the radial cage 132 and the auxiliary thrust cage 133 are disposed between the inner ring 110 and the second outer ring 122.

[0062] Furthermore, the roller 140 may include a main thrust roller 141, a radial roller 142, and an auxiliary thrust roller 143. The main thrust roller 141 is mounted on the main thrust cage 131, the radial roller 142 is mounted on the radial cage 132, and the auxiliary thrust roller 143 is mounted on the auxiliary thrust cage 133. The axial directions of the main thrust roller 141 and the auxiliary thrust roller 143 are perpendicular to the axial direction of the bearing, while the axial direction of the radial roller 142 is aligned with the axial direction of the bearing. The main thrust roller 141 and the auxiliary thrust roller 143 can withstand the axial load and overturning moment along the main bearing 100 of the tunneling machine. The radial roller 142 mainly bears the radial load from the main bearing 100 of the tunneling machine, and the auxiliary thrust roller mainly bears the overturning moment from the main bearing 100 of the tunneling machine.

[0063] The tunneling machine main bearing 100 provided in this embodiment of the invention has a notch in its outer ring 120, a removable replacement part 150 is filled in the notch, and a radial observation hole 152 is made in the replacement part 150. An image acquisition unit is installed in the observation hole 152. The image acquisition unit can clearly acquire image data of the roller 140 and cage 130 exposed at the notch. By observing and analyzing the acquired image data, it is possible to determine whether the cage 130 and roller 140 have failed and the specific location of the failure, thereby achieving accurate monitoring of the operating status of the tunneling machine main bearing 100. Furthermore, when a failure is detected in the roller 140 or cage 130, the operator can quickly replace the cage 130 and roller 140 through the notch by removing the replacement part 150. After replacement, the replacement part 150 can be refilled. The operation is very convenient and greatly improves the maintenance efficiency of the tunneling machine main bearing 100.

[0064] Specifically, analyzing the image data can include analyzing whether there are cracks, surface peeling, corrosion, dimensional changes, etc. on the roller 140 and the cage 130, so as to know the damage status of the roller 140 and the cage 130 and to repair the roller 140 and the cage 130 in a timely manner.

[0065] Specifically, for the main push roller 141 and the auxiliary push roller 143, their diameters can be compared and analyzed in real time. Let's assume the diameter of the main push roller 141 is d. zi (i = 1, 2, ..., n), where n is the number of main push rollers 141, d z Given the initial diameter of the main push roller 141 and Δd as the maximum allowable tolerance of the main push roller 141, then the diameter d of each main push roller 141 is... zi Condition |d must be met zi -d z |≤Δd z If |d zi -d z |>Δd z If the wear of the main thrust roller 141 is too high, it indicates that the wear has affected the normal operation of the main bearing 100 of the tunneling machine, and the main thrust roller 141 needs to be replaced. Similarly, the wear of the auxiliary thrust roller 143 can be analyzed in a similar way to that of the main thrust roller 141, which will not be elaborated here.

[0066] For the main pusher cage 131, auxiliary pusher cage 133, and radial cage 132, image recognition technology can be used to monitor the presence of cracks on their surfaces in real time. First, the image data acquired by the image acquisition unit can be preprocessed; specifically, image denoising technology can be used to eliminate the effects of oil stains, uneven lighting, and wear particles. Then, cracks are identified and extracted. Finally, parameters such as the crack width, length, and direction are calculated and analyzed, and image deformation correction and three-dimensional reconstruction techniques are used to restore the true shape of the crack. Let the crack width be x. To ensure the normal operation of the cage 130, the condition x ≤ X must be met, where X is the maximum allowable crack width. When x > X, the cage 130 needs to be replaced.

[0067] For radial roller 142, since it needs to withstand huge radial loads and rotation, in addition to analyzing its wear condition, it is generally necessary to focus on observing whether there are cracks, burns and indentations on its surface.

[0068] In the above embodiments, the illumination hole 151 may include a first illumination hole 1511, a second illumination hole 1512, and a third illumination hole 1513 spaced apart along the bearing axial direction, and the observation hole 152 includes a first observation hole 1521, a second observation hole 1522, and a third observation hole 1523 spaced apart along the bearing axial direction. Along the bearing axial direction, the first illumination hole 1511, the second illumination hole 1512, and the third illumination hole 1513 correspond one-to-one with the positions of the main thrust retainer 131, the radial retainer 132, and the auxiliary thrust retainer 133, respectively. Similarly, the first observation hole 1521, the second observation hole 1522, and the third observation hole 1523 correspond one-to-one with the positions of the main thrust retainer 131, the radial retainer 132, and the auxiliary thrust retainer 133, respectively. It can be understood that each illumination hole 151 and observation hole 152 is equipped with a corresponding illumination lamp and image acquisition unit. By setting up one-to-one corresponding illumination lamps and image acquisition units, the accuracy of monitoring can be further improved.

[0069] In the above embodiments, the main pusher retainer 131, the radial retainer 132, and the auxiliary pusher retainer 133 can all include multiple arc-shaped frame segments, with the curvature of the notch not exceeding 180° and the curvature of the notch being greater than or equal to the largest curvature among the frame segments. It can be understood that ensuring the curvature of the notch is no greater than 180° minimizes the impact of the notch on the operation of the outer ring 120, while ensuring the curvature of the notch is greater than the largest curvature among the frame segments ensures that the frame segments can be easily disassembled and installed through the notch.

[0070] In order to facilitate the quick location of the damaged position when replacing the roller 140 and the cage 130, each cage 150 can be marked with a serial number, so that the damaged position can be quickly found by serial number, thereby further improving the maintenance efficiency of the tunneling machine main bearing 100.

[0071] The above embodiments may further include a controller and an alarm. The lighting, image acquisition unit, and alarm are all electrically connected to the controller. The controller can determine whether the cage 130 and roller 140 have malfunctioned based on the image data acquired by the image acquisition unit, and control the alarm to issue an alarm signal when a malfunction occurs in the cage 130 or roller 140, to remind maintenance personnel to repair the cage 130 and roller 140 through the gap. The controller can also control the opening and closing of the lighting and image acquisition unit. The controller and alarm can be installed in the control room of the tunneling machine for convenient operation and monitoring by construction personnel. Furthermore, a display can be installed, electrically connected to the controller. The display can show images captured by the image acquisition unit and the analysis results of the controller in real time, allowing construction personnel to more intuitively understand the current working condition of the tunneling main bearing.

[0072] The main bearing 100 of a tunneling machine provided in this embodiment of the invention includes an inner ring 110, an outer ring 120, a cage 130, rollers 140, and a replacement part 150. The outer ring 120 is sleeved outside the inner ring 110. The cage 130 is circumferentially disposed between the inner ring 110 and the outer ring 120. The rollers 140 are mounted on the cage 130. The outer ring 120 has an arc-shaped notch circumferentially to expose the cage 130 and rollers 140 at the radial position of the bearing corresponding to the notch. The replacement part 150 is detachably filled in the notch. An observation hole 152 is provided on the replacement part 150 at the radial position of the bearing. An image acquisition unit is provided in the observation hole 152. The lens of the image acquisition unit is directed towards the cage 130 and rollers 140 at the position corresponding to the notch. The image acquisition unit is used to acquire image data of the cage 130 and rollers 140 at the position corresponding to the notch, so as to determine the working state of the cage 130 and rollers 140 based on the image data.

[0073] The tunneling machine main bearing 100 provided in this embodiment of the invention has a notch in its outer ring 120, a removable replacement part 150 is filled in the notch, and a radial observation hole 152 is made in the replacement part 150. An image acquisition unit is installed in the observation hole 152. The image acquisition unit can clearly acquire image data of the roller 140 and cage 130 exposed at the notch. By observing and analyzing the acquired image data, it is possible to determine whether the cage 130 and roller 140 have failed and the specific location of the failure, thereby achieving accurate monitoring of the operating status of the tunneling machine main bearing 100. Furthermore, when a failure is detected in the roller 140 or cage 130, the operator can quickly repair the cage 130 and roller 140 through the notch by removing the replacement part 150. After the repair is completed, the replacement part 150 can be refilled. The operation is very convenient and greatly improves the maintenance efficiency of the tunneling machine main bearing 100.

[0074] Furthermore, this invention also provides a tunnel boring machine, including any of the main bearings 100 described in the above embodiments. This tunnel boring machine can accurately monitor the operating status of the main bearing and facilitate repair when a fault occurs, thereby improving the reliability and service life of the tunnel boring machine.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A main bearing of a heading machine, characterized in that, It includes an inner ring, an outer ring, a cage, rollers, and replacement parts, wherein the outer ring is fitted over the inner ring, the cage is circumferentially disposed between the inner ring and the outer ring, and the rollers are installed inside the cage; The outer ring has an arc-shaped notch along the circumference to expose the cage and rollers corresponding to the notch along the radial direction of the bearing. The replacement part is removably filled into the notch and has an observation hole along the radial direction of the bearing. An image acquisition unit is provided in the observation hole. The lens of the image acquisition unit is directed towards the cage and roller at the location corresponding to the notch. The image acquisition unit is used to acquire image data of the cage and roller at the location corresponding to the notch, so as to determine the working state of the cage and roller based on the image data.

2. The main bearing of a heading machine according to claim 1, characterized in that The replacement part is further provided with an illumination hole along the radial direction of the bearing, and an illumination lamp is installed in the illumination hole. The illumination lamp is configured to illuminate the cage and rollers corresponding to the notch.

3. The main bearing of a heading machine according to claim 2, characterized in that The outer ring includes a first outer ring and a second outer ring, which are spliced ​​together along the axial direction of the bearing to form the outer ring. A portion of the notch is located in the first outer ring, and another portion of the notch is located in the second outer ring. The cage includes a main thrust cage, a radial cage, and an auxiliary thrust cage arranged sequentially at intervals along the axial direction of the bearing. The main thrust cage is located between the inner ring and the first outer ring, and the radial cage and the auxiliary thrust cage are located between the inner ring and the second outer ring.

4. The main bearing of a heading machine according to claim 3, characterized in that The rollers include a main push roller, a radial roller, and an auxiliary push roller. The main push roller is mounted on the main push cage, the radial roller is mounted on the radial cage, and the auxiliary push roller is mounted on the auxiliary push cage. The axial directions of the main push roller and the auxiliary push roller are perpendicular to the axial direction of the bearing, and the axial direction of the radial roller is aligned with the axial direction of the bearing.

5. The tunneling machine main bearing according to claim 4, characterized in that, The illumination holes include a first illumination hole, a second illumination hole, and a third illumination hole spaced apart along the bearing axial direction. The observation holes include a first observation hole, a second observation hole, and a third observation hole spaced apart along the bearing axial direction. Along the bearing axial direction, the first illumination hole, the second illumination hole, and the third illumination hole correspond one-to-one with the positions of the main thrust cage, the radial cage, and the auxiliary thrust cage, respectively. The first observation hole, the second observation hole, and the third observation hole correspond one-to-one with the positions of the main thrust cage, the radial cage, and the auxiliary thrust cage, respectively.

6. The main bearing of a heading machine according to claim 5, characterized in that The main pusher retainer, radial retainer, and auxiliary pusher retainer all include multiple arc-shaped frame segments. The arc of the notch is no greater than 180°, and the arc of the notch is greater than or equal to the largest arc of the frame segments.

7. The main bearing of a heading machine according to claim 6, characterized in that It also includes a controller and an alarm. The lighting, image acquisition unit and the alarm are all electrically connected to the controller. The controller is configured to determine whether the cage and rollers are faulty based on the image data acquired by the image acquisition unit, and to control the alarm to issue an alarm signal when the cage or rollers are faulty, so as to remind maintenance personnel to replace the cage and rollers through the notch.

8. A main bearing of a heading machine according to any one of claims 1 - 7, characterized in that, There is a gap between the replacement part and the roller.

9. A main bearing of a heading machine according to any one of claims 1 - 7, characterized in that The replacement part is a rubber product.

10. A tunnel boring machine characterized by, Includes the main bearing of the tunneling machine according to any one of claims 1-9.

Images