An internal spraying device and a transverse shaft type tunneling machine cutting mechanism

Abstract

The application discloses an internal spraying device and a horizontal shaft type tunneling machine cutting mechanism and relates to the technical field of coal mine underground roadway tunneling. The internal spraying device comprises a water passing shaft mechanism and a water distribution disc mechanism. The water distribution disc mechanism comprises a water distribution disc body and a rotating water sealing assembly. The water distribution disc body is detachably installed on a cutting head. An outer end surface of the water distribution disc body is provided with a water passing hole. A side surface of the water distribution disc body is provided with a side water passing channel. The water passing hole is in communication with the side water passing channel. The water passing shaft mechanism comprises a water passing shaft body, a water passing plate and an axial limiting assembly. The water passing shaft body is provided with a central water passing channel penetrating through the inner and outer ends. One end of the water passing shaft body is detachably installed on a water jacket of a speed reducer. One side of the water passing plate is provided with a water passing opening. The water passing opening is in communication with the water passing hole. The internal spraying device and the horizontal shaft type tunneling machine cutting mechanism realize the internal spraying function of a fixed area, avoid water flow from being sprayed towards the tunneling machine body and are convenient to disassemble and replace.

Description

Technical Field

[0001] This invention relates to the field of underground roadway excavation technology in coal mines, and in particular to an internal spraying device and a cutting mechanism for a horizontal axis tunneling machine. Background Technology

[0002] Tunnel boring machines (TBMs) are classified into longitudinal axis TBMs (where the centerline of the cutting head is parallel to the machine body) and transverse axis TBMs (where the centerline of the cutting head is perpendicular to the machine body) based on the direction of the cutting head's centerline relative to the machine body. The cutting mechanism of a longitudinal axis TBM consists of a motor, reducer, cantilever section, and cutting head. An internal spray system is located on the cutting head, and its internal channels typically connect to the water channels on the cantilever section's main shaft, leading the spray water into the internal spray water path on the cutting head. The cutting mechanism of a transverse axis TBM mainly consists of a motor, reducer, and cutting head, without a cantilever section. Due to the complex reducer structure of transverse axis TBMs, and the fact that arranging the internal spray system in the same way as a typical longitudinal axis TBM would cause the water to spray towards the machine body, and because the internal spray system is easily damaged and difficult to disassemble and replace, existing transverse axis TBMs generally do not have an internal spray system. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides an internal spraying device and a horizontal axis tunneling machine cutting mechanism, which realizes the internal spraying function in a fixed area, avoids water flow from spraying onto the tunneling machine body, and facilitates disassembly and replacement.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides an internal spraying device, including a water-passing shaft mechanism and a water distribution plate mechanism. The water distribution plate mechanism includes a water distribution plate body and a rotating water seal assembly. The water distribution plate body has mounting through holes extending through both its inner and outer ends. The water distribution plate body is detachably mounted on a cutting head. A water-passing hole is provided on the outer end face of the water distribution plate body, and a side water-passing channel is provided on the side of the water distribution plate body. The water-passing hole communicates with the side water-passing channel, and the side water-passing channel communicates with a water outlet channel on the cutting head. The water-passing shaft mechanism includes a water-passing shaft body, a water-passing plate, and an axial limiting assembly. The water-passing shaft body has a central water-passing channel extending through both its inner and outer ends. One end of the water-passing shaft is detachably mounted on the reducer water jacket. The central water passage is connected to the water inlet passage on the reducer water jacket. The other end of the water-passing shaft body extends through the mounting through hole to the outside of the water distribution plate body. The rotating water seal assembly is disposed between the water-passing shaft body and the water distribution plate body. The water-passing plate is slidably sleeved on the outer end of the water-passing shaft body, and the water-passing plate and the water-passing shaft body are relatively limited in the circumferential direction. The water-passing plate is located on the outside of the water distribution plate body. The axial limiting assembly is mounted on the water-passing shaft body and located on the outside of the water-passing plate. A water outlet is provided on one side of the water-passing plate, and the water outlet can be connected to the water-passing hole.

[0006] Preferably, the water distribution tray body includes a first tray, a second tray, and a third tray connected sequentially from the outside to the inside. The outer diameters of the first tray, the second tray, and the first tray decrease sequentially. The third tray is provided with an external thread and is used for threaded installation on the cutting head. The first tray is provided with a plurality of water passage holes, and the side of the second tray is provided with a plurality of side water passage channels. Each water passage hole is connected to one of the side water passage channels.

[0007] Preferably, the mounting through hole includes a first through hole, a second through hole, and a third through hole connected sequentially from the outside to the inside, with the inner diameters of the first through hole, the second through hole, and the third through hole decreasing sequentially. The rotating water seal assembly includes a first rotating water seal, a second rotating water seal, a water seal seat, a first sealing ring, and a first retaining ring. The first rotating water seal is interference-fitted with the third through hole. The first sealing ring, the water seal seat, and the first retaining ring are installed sequentially from the inside to the outside in the first through hole. The water seal seat is relatively limited relative to the water distribution plate body in the circumferential direction. The second rotating water seal is interference-fitted with the water seal seat. The water-passing shaft body extends to the outside by sequentially passing through the first rotating water seal and the second rotating water seal.

[0008] Preferably, the water-passing shaft body includes a stud, a square column, and a cylindrical column connected sequentially from the outside to the inside. An annular plate is fixedly sleeved on the cylindrical column. The annular plate is detachably installed on the reducer water jacket. A square hole is provided in the middle of the water-passing plate, and the water-passing plate is slidably sleeved on the outside of the square column. The axial limiting component is installed on the stud.

[0009] Preferably, the water-passing shaft mechanism further includes a second sealing ring, which is sleeved on the cylinder and located inside the annular plate.

[0010] Preferably, the water-passing shaft mechanism further includes a plurality of connecting screws, which are used to fix the annular plate to the reducer water jacket.

[0011] Preferably, the axial limiting assembly includes a nut and a disc spring, the disc spring being sleeved on the stud, the nut being threaded onto the stud, and the disc spring being located between the water-passing plate and the nut.

[0012] Preferably, the water-passing plate is a circular plate, and the water-passing outlet is a fan-shaped notch.

[0013] This invention also provides a horizontal shaft tunneling machine cutting mechanism, including an internal spray device, a cutting head, a cutting head end cover, a reducer water jacket, a reducer planetary carrier, a reducer power output spline, an output bearing, an outer end cover of the bearing, and an inner end cover of the bearing. The reducer water jacket is fixed to the middle of the front end of the reducer planetary carrier. A water inlet channel is provided in the reducer water jacket, and a water supply channel is provided in the reducer planetary carrier. The water supply channel is connected to the water inlet channel. The inner ring of the output bearing is fixedly sleeved on the reducer planetary carrier. The inner end cover of the bearing is fixed to the outer end face of the reducer planetary carrier and performs shafting on the inner ring of the output bearing. The reducer power output spline is fixedly sleeved on the outer ring of the output bearing. The bearing outer end cover is fixed on the outer end face of the reducer power output spline and circumferentially limits the outer ring of the output bearing. The reducer power output spline is provided with an external spline on the outside. The cutting head is provided with an internal spline that matches the structure of the external spline. The reducer power output spline can drive the cutting head and the water distribution plate body to rotate. The cutting head is provided with the water outlet channel. The cutting head end cover is fixed to the middle of the outer end of the cutting head. The cutting head end cover covers the outside of the water-passing shaft body and the water distribution plate body.

[0014] Preferably, the assembly further includes a skeleton oil seal, a third rotary water seal, and a second retaining ring. A central hole is provided in the middle of the bearing outer end cover. The reducer water jacket extends to the outside through the central hole. The central hole includes a first circular hole and a second circular hole connected sequentially from the outside to the inside. The inner diameter of the first circular hole is larger than the inner diameter of the second circular hole. The skeleton oil seal, the third rotary water seal, and the second retaining ring are installed sequentially from the inside to the outside in the first circular hole. Both the skeleton oil seal and the third rotary water seal are interference-fitted with the bearing outer end cover. Both the skeleton oil seal and the third rotary water seal are located between the bearing outer end cover and the reducer water jacket.

[0015] The present invention achieves the following technical effects compared to the prior art:

[0016] The internal spray device of the present invention includes a water-passing shaft mechanism and a water distribution plate mechanism. The water distribution plate mechanism includes a water distribution plate body and a rotating water seal assembly. The water-passing shaft mechanism includes a water-passing shaft body, a water-passing plate, and an axial limiting assembly. In the present invention, the water distribution plate body can be detachably installed on the cutting head. The cutting head is a rotating component that drives the water distribution plate body to rotate. The water-passing shaft body can be detachably installed on the reducer water jacket. The reducer water jacket is a fixed component, that is, the water-passing shaft body is also a fixed component. During operation, the water distribution plate body can rotate relative to the water-passing shaft body. Only when the water-passing hole on the outer end face of the water distribution plate body rotates to correspond to the water-passing port on the water-passing plate can water be sprayed out from the central water-passing channel through the water-passing port, the water-passing hole, the side water-passing channel, and the water outlet channel on the cutting head, thus realizing the internal spraying function of a fixed area. Specifically, when installing the water-passing plate, the water-passing port is located on the side away from the tunneling machine body, so that water is sprayed towards the side away from the tunneling machine body during operation, avoiding water flow towards the tunneling machine body. When the internal spraying device malfunctions, the entire device can be easily disassembled and replaced simply by removing the end cap of the cutting head, thus achieving a quick-installation function. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the horizontal axis tunneling machine cutting mechanism provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the internal spray device provided by the present invention;

[0020] Figure 3This is a schematic diagram of the water distribution plate mechanism in the internal spray device provided by the present invention;

[0021] Figure 4 This is a cross-sectional view of the water distribution plate mechanism in the internal spray device provided by the present invention;

[0022] Figure 5 This is a schematic diagram of the water-passing shaft mechanism in the internal spray device provided by the present invention;

[0023] Figure 6 This is a schematic diagram of the water-passing plate in the internal spray device provided by the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Water distribution plate body; 101. First plate body; 102. Second plate body; 103. Third plate body; 2. Water passage hole; 3. Side water passage channel; 4. First through hole; 5. Second through hole; 6. Third through hole; 7. First rotary water seal; 8. First sealing ring; 9. Water seal seat; 10. First retaining ring; 11. Second rotary water seal; 12. Water passage shaft body; 1201. Stud; 1202. Square column; 1203. Cylindrical column; 1204. Annular plate; 13. Central water passage channel; 14. Connecting screw; 15. 16. Water inlet plate; 17. Square hole; 18. Disc spring; 19. Nut; 20. Cutting head; 21. Water outlet channel; 22. Cutting head end cap; 23. Reducer water jacket; 24. Water inlet channel; 25. Reducer planetary carrier; 26. Reducer power output spline; 27. Output bearing; 28. Bearing outer end cap; 29. ​​Bearing inner end cap; 30. Bolt; 31. Water supply channel; 32. Third rotary water seal; 33. Second retaining ring; 34. Water passage cavity; 35. Second sealing ring; 36. Third sealing ring; 37. Skeleton oil seal. Detailed Implementation

[0025] 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.

[0026] The purpose of this invention is to provide an internal spraying device and a horizontal axis tunneling machine cutting mechanism, which realizes the internal spraying function in a fixed area, avoids water flow from spraying onto the tunneling machine body, and facilitates disassembly and replacement.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1-6As shown, this embodiment provides an internal spraying device, including a water-passing shaft mechanism and a water distribution plate mechanism. The water distribution plate mechanism includes a water distribution plate body 1 and a rotating water seal assembly. The water distribution plate body 1 is provided with mounting through holes penetrating both the inner and outer ends. The water distribution plate body 1 is used to detachably install on the cutting head 20. The outer end face of the water distribution plate body 1 is provided with water-passing holes 2. The axial direction of the water-passing holes 2 is consistent with the axial direction of the water distribution plate body 1. The side of the water distribution plate body 1 is provided with a side water-passing channel 3. The water-passing holes 2 are connected to the side water-passing channel 3, and the side water-passing channel 3 is used to connect with the water outlet channel 21 on the cutting head 20. The water-passing shaft mechanism includes a water-passing shaft body 12, a water-passing plate 15, and an axial limiting assembly. The water-passing shaft body 12 is provided with mounting through holes penetrating both the inner and outer ends. The water passage 13 is located at the center of the end. One end of the water passage shaft body 12 is detachably mounted on the reducer water jacket 23. The water passage 13 is connected to the water inlet channel 24 on the reducer water jacket 23. The other end of the water passage shaft body 12 extends through the mounting through hole to the outside of the water distribution plate body 1. The rotating water seal assembly is located between the water passage shaft body 12 and the water distribution plate body 1. The water passage plate 15 is slidably sleeved on the outer end of the water passage shaft body 12. The water passage plate 15 and the water passage shaft body 12 are relatively limited in the circumferential direction. The water passage plate 15 is located on the outside of the water distribution plate body 1. The axial limiting assembly is mounted on the water passage shaft body 12 and located on the outside of the water passage plate 15. A water outlet 16 is provided on one side of the water passage plate 15. The water outlet 16 can be connected to the water passage hole 2.

[0029] In this embodiment, the water distribution plate body 1 can be detachably installed on the cutting head 20. The cutting head 20 is a rotating component that drives the water distribution plate body 1 to rotate. The water conveying shaft body 12 can be detachably installed on the reducer water jacket 23. The reducer water jacket 23 is a fixed component, that is, the water conveying shaft body 12 is also a fixed component. During operation, the water distribution plate body 1 can rotate relative to the water conveying shaft body 12. Only when the water conveying hole 2 on the outer end face of the water distribution plate body 1 rotates to correspond with the water inlet 16 on the water conveying plate 15, can water be sprayed out from the central water conveying channel 13 through the water inlet 16, the water inlet 2, the side water conveying channel 3 and the water outlet channel 21 on the cutting head 20, realizing the internal spraying function of the fixed area. Specifically, when installing the water conveying plate 15, the water inlet 16 is located on the side away from the tunneling machine body, so that water is sprayed to the side away from the tunneling machine body during operation, avoiding water flow towards the tunneling machine body and optimizing the underground working environment. When the internal spray device malfunctions, the entire device can be easily disassembled and replaced simply by removing the end cover 22 of the cutting head. This achieves a quick-installation function and solves the problem of difficult troubleshooting caused by the complex disassembly and assembly of internal spray devices in coal mines. This facilitates the promotion and use of the internal spray device in horizontal shaft tunneling machines.

[0030] like Figure 3As shown, the water distribution plate body 1 includes a first plate 101, a second plate 102, and a third plate 103 connected sequentially from the outside to the inside. A water-passing plate 15 is located outside the first plate 101. The first plate 101, second plate 102, and third plate 103 are all discs, with their outer diameters decreasing sequentially. The third plate 103 has external threads and is used for threaded installation onto the cutting head 20. The first plate 101 has multiple water-passing holes 2, and the second plate 102 has multiple side water-passing channels 3 on its side. Each water-passing hole 2 is connected to a side water-passing channel 3. In this embodiment, the water distribution plate body 1 is threadedly connected to the cutting head 20, simplifying the connection structure design and facilitating installation and disassembly.

[0031] like Figure 4 As shown, the mounting through holes include a first through hole 4, a second through hole 5, and a third through hole 6 connected sequentially from the outside to the inside. The inner diameters of the first through hole 4, the second through hole 5, and the third through hole 6 decrease sequentially. The rotating water seal assembly includes a first rotating water seal 7, a second rotating water seal 11, a water seal seat 9, a first sealing ring 8, and a first retaining ring 10. The first rotating water seal 7 is interference-fitted with the third through hole 6. The first sealing ring 8, the water seal seat 9, and the first retaining ring 10 are installed sequentially from the inside to the outside in the first through hole 4. The water seal seat 9 is connected to the water distribution plate. The body 1 is relatively limited in the circumferential direction. Specifically, the water seal seat 9 and the water distribution plate body 1 are fitted with a flat key to achieve circumferential limitation. The inner end of the water seal seat 9 is limited by the step formed by the connection between the first through hole 4 and the second through hole 5, and the outer end of the water seal seat 9 is limited by the first retaining ring 10. The first retaining ring 10 is set in the first mounting groove on the inner wall of the water distribution plate body 1. The second rotary water seal 11 is interference-fitted with the water seal seat 9. The water-passing shaft body 12 passes through the first rotary water seal 7 and the second rotary water seal 11 in sequence and extends to the outside. The circumferential surfaces of the first rotary water seal 7 and the second rotary water seal 11 that contact the water-passing shaft are relative rotating surfaces and are small clearance fits. In this embodiment, two rotary water seals are designed inside the water distribution plate body 1 for graded protection.

[0032] like Figure 5 As shown, the water-passing shaft body 12 includes a stud 1201, a square column 1202, and a cylindrical column 1203 connected sequentially from the outside to the inside. An annular plate 1204 is fixedly sleeved on the cylindrical column 1203. The annular plate 1204 is used to be detachably installed on the reducer water jacket 23. A square hole 17 is provided in the middle of the water-passing plate 15, and the water-passing plate 15 is slidably sleeved on the outside of the square column 1202. The circumferential positioning of the water-passing plate 15 and the water-passing shaft body 12 is achieved by using the structure of the square hole 17 cooperating with the square column 1202. The axial positioning component is installed on the stud 1201.

[0033] like Figure 2As shown, the water-passing shaft mechanism also includes a second sealing ring 35, which is sleeved on the cylinder 1203 and located inside the annular plate 1204. After the water-passing shaft body 12 is installed on the reducer water jacket 23, the second sealing ring 35 is pressed between the annular plate 1204 and the reducer water jacket 23 to improve the sealing performance.

[0034] The water-passing shaft mechanism also includes multiple connecting screws 14, which are used to fix the annular plate 1204 to the reducer water jacket 23. In this embodiment, the water-passing shaft body 12 and the reducer water jacket 23 are connected by connecting screws 14, which facilitates installation and disassembly.

[0035] The axial limiting assembly includes a nut 19 and a disc spring 18. The disc spring 18 is sleeved on a stud 1201, and the nut 19 is threaded onto the stud 1201. The disc spring 18 is located between the water-passing plate 15 and the nut 19, with the disc spring 18 mounted on the outer side of the water-passing plate 15. Tightening the nut 19 applies a preload. By mounting the disc spring 18 between the water-passing plate 15 and the nut 19, pressure compensation is provided for the wear between the water-passing plate 15 and the first disc 101, ensuring the spraying effect and improving the service life of the internal spraying device.

[0036] like Figure 6 As shown, in this embodiment, the water-passing plate 15 is a circular plate, and the water-passing port 16 is a fan-shaped notch.

[0037] During installation, first remove the nut 19, disc spring 18, and water-passing plate 15 from the water-passing shaft mechanism. Then, put the second sealing ring 35 on the cylinder 1203 and press the second sealing ring 35 between the annular plate 1204 and the reducer water jacket 23. Secure the annular plate 1204 to the mounting hole of the reducer water jacket 23 with connecting screws 14. Tighten the water distribution plate body 1 to the threaded hole of the cutting head 20 through the external thread. Install the water-passing plate 15, position the water outlet 16 at the designed angle to the area where internal spray water is required, install the disc spring 18, and tighten it with the nut 19. During operation, the internal spray water enters the central water passage 13 of the water passage shaft body 12 through the water inlet channel 24 of the reducer water jacket 23. When the water passage hole 2 on the water distribution plate body 1 rotates to the water passage port 16 of the water passage plate 15, the internal spray water is sprayed out from the water passage hole 2, the side water passage 3 and the water outlet channel 21 of the cutting head 20, realizing the internal spray function of the fixed area.

[0038] like Figure 1As shown, this embodiment also provides a horizontal shaft tunneling machine cutting mechanism, including an internal spray device, a cutting head 20, a cutting head end cover 22, a reducer water jacket 23, a reducer planetary carrier 25, a reducer power output spline 26, an output bearing 27, a bearing outer end cover 28, and a bearing inner end cover 29. The reducer planetary carrier 25 is a fixed component, the reducer power output spline 26 is a rotating component, the reducer water jacket 23 is fixed to the middle of the front end of the reducer planetary carrier 25, the reducer water jacket 23 is provided with a water inlet channel 24, the reducer planetary carrier 25 is provided with a water supply channel 31, the water supply channel 31 is connected to the water inlet channel 24, the inner ring of the output bearing 27 is fixedly sleeved on the reducer planetary carrier 25, and the bearing inner end cover 29 is fixed to the outer end face of the reducer planetary carrier 25 and axially limits the inner ring of the output bearing 27; the reducer The power output spline 26 is fixedly sleeved on the outer ring of the output bearing 27. The bearing outer end cover 28 is fixed on the outer end face of the reducer power output spline 26 and circumferentially limits the outer ring of the output bearing 27. The reducer power output spline 26 is provided with an external spline. The cutting head 20 is provided with an internal spline that matches the external spline structure. The reducer power output spline 26 can drive the cutting head 20 and the water distribution plate body 1 to rotate. The cutting head 20 is provided with a water outlet channel 21. The water outlet channel 21 corresponds one-to-one with the side water passage channel 3. That is, each side water passage channel 3 is connected to a water outlet channel 21. The axial direction of the water outlet channel 21 is perpendicular to the axial direction of the water passage hole 2. The cutting head end cover 22 is fixed in the middle of the outer end of the cutting head 20. The cutting head end cover 22 covers the outside of the water passage shaft body 12 and the water distribution plate body 1.

[0039] Specifically, the cutting head 20 is provided with a first receiving hole, a second receiving hole, a third receiving hole and a threaded hole in sequence from the outside to the inside. The first receiving hole penetrates the outer end face of the cutting head 20, and the threaded hole penetrates the inner end face of the cutting head 20. The water outlet channel 21 is connected to the third receiving hole. The inner diameters of the first receiving hole, the second receiving hole, the third receiving hole and the threaded hole decrease in sequence. The third disc 103 is installed in the threaded hole. The second disc 102 is set in the third receiving hole, and the third receiving hole matches the structure of the second disc 102. The first disc 101 is set in the second receiving hole, and the inner diameter of the second receiving hole is larger than the outer diameter of the first disc 101. The cutting head end cap 22 is set in the first receiving hole and is fixed to the cutting head 20 by bolts 30. A third sealing ring 36 is provided between the cutting head end cap 22 and the cutting head 20. A water passage cavity 34 is formed between the inner side of the cutting head end cap 22 and the water passage plate 15.

[0040] Specifically, the front end of the reducer water jacket 23 is provided with a first circular receiving groove and a second circular receiving groove connected sequentially from the outside to the inside. The inner diameter of the first circular receiving groove is larger than the inner diameter of the second circular receiving groove. When the water shaft body 12 is installed, the inner end of the cylinder 1203 is located in the second circular receiving groove, the annular plate 1204 is located in the first circular receiving groove, the outer end of the second sealing ring 35 is in contact with the annular plate 1204, and the inner end is in contact with the first circular receiving groove.

[0041] This embodiment also includes a skeleton oil seal 37, a third rotary water seal 32, and a second retaining ring 33. A central hole is provided in the middle of the bearing outer end cover 28. The reducer water jacket 23 extends to the outside through the central hole. The central hole includes a first circular hole and a second circular hole connected sequentially from the outside to the inside. The inner diameter of the first circular hole is larger than the inner diameter of the second circular hole. The skeleton oil seal 37, the third rotary water seal 32, and the second retaining ring 33 are installed sequentially from the inside to the outside of the first circular hole. Both the skeleton oil seal 37 and the third rotary water seal 32 are press-fitted with the bearing outer end cover 28. The second retaining ring 33 is located in the second mounting groove on the inner wall of the bearing outer end cover 28. The inner end of the skeleton oil seal 37 is limited by the bearing outer end cover 28 itself, and the outer end of the third rotary water seal 32 is limited by the second retaining ring 33. Both the skeleton oil seal 37 and the third rotary water seal 32 are located between the bearing outer end cover 28 and the reducer water jacket 23. The skeleton oil seal 37 is used to seal the gear oil inside the reducer, and the circumferential surface of the third rotary water seal 32 that contacts the reducer water jacket 23 is a relative rotating surface, which is a small clearance fit. By arranging a water seal outside the reducer water jacket 23, the reducer is protected to prevent backflow of spray water into the reducer due to failure of the internal spray device, which could cause damage.

[0042] In this specific embodiment, the reducer water jacket 23 is fixed to the middle of the front end of the reducer planetary carrier 25 by bolts 30, the bearing inner end cover 29 is fixed to the outer end face of the reducer planetary carrier 25 by bolts 30, and the bearing outer end cover 28 is fixed to the outer end face of the reducer power output spline 26 by bolts 30.

[0043] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An internal spray device, characterized in that, The device includes a water-passing shaft mechanism and a water-distribution plate mechanism. The water-distribution plate mechanism includes a water-distribution plate body and a rotating water seal assembly. The water-distribution plate body has mounting through holes extending through both its inner and outer ends. The water-distribution plate body is detachably mounted on a cutting head. A water-passing hole is provided on the outer end face of the water-distribution plate body, and a side water-passing channel is provided on the side of the water-distribution plate body. The water-passing hole communicates with the side water-passing channel, which is used to communicate with the water outlet channel on the cutting head. The water-passing shaft mechanism includes a water-passing shaft body, a water-passing plate, and an axial limiting assembly. The water-passing shaft body has a central water-passing channel extending through both its inner and outer ends. The water-passing shaft body has one end detachably mounted on the reducer water jacket, and the central water-passing channel is connected to the water inlet channel on the reducer water jacket. The other end of the water-passing shaft body extends through the mounting through hole to the outside of the water distribution plate body. The rotating water seal assembly is disposed between the water-passing shaft body and the water distribution plate body. The water-passing plate is slidably sleeved on the outer end of the water-passing shaft body, and the water-passing plate and the water-passing shaft body are relatively limited in the circumferential direction. The water-passing plate is located outside the water distribution plate body. The axial limiting assembly is mounted on the water-passing shaft body and located outside the water-passing plate. A water inlet is provided on one side of the water-passing plate, and the water inlet can communicate with the water-passing hole; the water distribution plate body includes a first plate, a second plate, and a third plate connected sequentially from the outside to the inside, the outer diameters of the first plate, the second plate, and the first plate decrease sequentially, the third plate is provided with an external thread, and the third plate is used for threaded installation on the cutting head, the first plate is provided with a plurality of water-passing holes, and the side of the second plate is provided with a plurality of side water-passing channels, each water-passing hole communicating with a side water-passing channel; the mounting through hole includes a first through hole, a second through hole, and a third through hole connected sequentially from the outside to the inside. The rotating water seal assembly includes a first rotating water seal, a second rotating water seal, a water seal seat, a first sealing ring, and a first retaining ring. The first rotating water seal is interference-fitted with the third through hole. The first sealing ring, the water seal seat, and the first retaining ring are installed sequentially from the inside to the outside of the first through hole. The water seal seat is relatively limited relative to the water distribution plate body in the circumferential direction. The second rotating water seal is interference-fitted with the water seal seat. The water-passing shaft body extends to the outside by sequentially passing through the first rotating water seal and the second rotating water seal.

2. The internal spray device according to claim 1, characterized in that, The water-passing shaft body includes a stud, a square column, and a cylindrical column connected sequentially from the outside to the inside. An annular plate is fixedly sleeved on the cylindrical column. The annular plate is used to be detachably installed on the water jacket of the reducer. A square hole is provided in the middle of the water-passing plate, and the water-passing plate is slidably sleeved on the outside of the square column. The axial limiting component is installed on the stud.

3. The internal spray device according to claim 2, characterized in that, The water-passing shaft mechanism also includes a second sealing ring, which is sleeved on the cylinder and located inside the annular plate.

4. The internal spray device according to claim 2, characterized in that, The water-passing shaft mechanism also includes a plurality of connecting screws, which are used to fix the annular plate to the water jacket of the reducer.

5. The internal spray device according to claim 2, characterized in that, The axial limiting assembly includes a nut and a disc spring. The disc spring is sleeved on the stud, and the nut is threaded onto the stud. The disc spring is located between the water-passing plate and the nut.

6. The internal spray device according to claim 2, characterized in that, The water-passing plate is a circular plate, and the water-passing outlet is a fan-shaped notch.

7. A cutting mechanism for a horizontal axis tunneling machine, characterized in that, The device includes the internal spraying device as described in any one of claims 1-6, the cutting head, the cutting head end cap, the reducer water jacket, the reducer planetary carrier, the reducer power output spline, the output bearing, the bearing outer end cap, and the bearing inner end cap. The reducer water jacket is fixed to the middle of the front end of the reducer planetary carrier. The reducer water jacket has a water inlet channel, and the reducer planetary carrier has a water supply channel connected to the water inlet channel. The inner ring of the output bearing is fixedly sleeved on the reducer planetary carrier, and the bearing inner end cap is fixed to the outer end face of the reducer planetary carrier and axially restricts the inner ring of the output bearing. The reducer power output spline is fixedly sleeved on the outer ring of the output bearing. The bearing outer end cap is fixed on the outer end face of the reducer power output spline and circumferentially limits the outer ring of the output bearing. The reducer power output spline is provided with an external spline. The cutting head is provided with an internal spline that matches the structure of the external spline. The reducer power output spline can drive the cutting head and the water distribution plate body to rotate. The cutting head is provided with the water outlet channel. The cutting head end cap is fixed to the middle of the outer end of the cutting head. The cutting head end cap covers the outside of the water-passing shaft body and the water distribution plate body.

8. The cutting mechanism of the horizontal axis tunneling machine according to claim 7, characterized in that, It also includes a skeleton oil seal, a third rotary water seal, and a second retaining ring. The outer end cover of the bearing has a central hole in the middle. The reducer water jacket extends to the outside through the central hole. The central hole includes a first circular hole and a second circular hole connected sequentially from the outside to the inside. The inner diameter of the first circular hole is larger than the inner diameter of the second circular hole. The skeleton oil seal, the third rotary water seal, and the second retaining ring are installed sequentially from the inside to the outside in the first circular hole. The skeleton oil seal and the third rotary water seal are both interference-fitted with the outer end cover of the bearing. The skeleton oil seal and the third rotary water seal are both located between the outer end cover of the bearing and the reducer water jacket.

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