Non-retracting cutting section internal spraying and heading machine

Abstract

The utility model relates to the technical field of mining equipment, especially to a non-stretching type cutting part internal spraying and heading machine. The non-stretching type cutting part internal spraying comprises: the input shaft and output shaft of speed reducer mechanism have the speed difference; the water pump is installed on the cutting head shaft; the transmission shaft is connected with the power drive end on the water pump and the input shaft respectively, so that the input shaft drives the water pump to work; the sealing sleeve is fixedly matched with the cutting head shaft and is provided with the first water path of the communication inlet water channel; the bearing sleeve is rotationally matched with the sealing sleeve and is provided with the second water path of the communication first water path, so that the water pump is supplied with water. The utility model utilizes the speed difference of the input shaft and output shaft to drive the water pump, so that the hydraulic oil circuit for driving the water pump to work is not needed, the overall structure is simple and compact, the installation is convenient, the leakage risk and cost are reduced, the internal spraying structure standardization is beneficial, and the internal spraying can be realized under the condition that the heading machine does not have a standby control valve.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a non-telescopic cutting section internal spray and tunneling machine. Background Technology

[0002] A tunneling machine (TBM) is a combined unit capable of cutting, loading, transporting, self-propelled movement, and dust suppression via spraying. The cutting section of a TBM includes a cutting head shaft and a cutting head. The cutting head shaft drives the cutting head to rotate, thus breaking the rock. TBMs typically have an internal spray system for cooling and dust suppression. To supply high-pressure water to the cutting head, a water pump is installed within the cutting section. Current dedicated internal spray water pumps for TBMs are hydraulically driven, requiring inlet and outlet oil pipelines. This results in numerous leaks due to complex sealing structures, difficult and costly manufacturing of parts, and hinders widespread adoption. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a non-telescopic cutting section spray and tunneling machine to solve the problems of the existing non-telescopic cutting section spray water pumps used in tunneling machines being hydraulically driven, which are prone to increased leakage risk due to multiple sealing structures, and have complex pipelines, high manufacturing costs, and are not conducive to promotion.

[0004] The first aspect of this utility model provides a non-retractable internal spray for a cutting section, comprising: A speed reduction mechanism has an input shaft and an output shaft, wherein the input shaft and the output shaft have a speed difference; A cutting head shaft is disposed at the end of the output shaft away from the input shaft, and the output shaft drives the cutting head shaft to rotate; a receiving cavity is provided on the cutting head shaft; A water pump is installed in the receiving cavity. The water pump rotates together with the cutting head shaft. The water pump has a power drive end and a water pumping channel. The cutting head shaft has an inlet channel and an outlet channel that connect to the water pumping channel. A drive shaft is connected to the power drive end and the input shaft respectively, so that the input shaft drives the water pump to work; A sealing sleeve is fixedly fitted to the cutting head shaft and surrounds the radial outer side of the cutting head shaft. The sealing sleeve has a first water passage that connects to the water inlet channel. The bearing sleeve is rotatably fitted with the sealing sleeve and is arranged on the radial outer side of the sealing sleeve. The bearing sleeve has a second water channel that connects to the first water channel.

[0005] Preferably, the rotation axis of the water pump is parallel to or coincides with the axis of the cutting head shaft.

[0006] Preferably, a rotary sealing part is provided between the bearing sleeve and the sealing sleeve, and multiple rotary sealing parts are provided and arranged at intervals along the axial direction, and the connection between the first water passage and the second water passage is provided between two adjacent rotary sealing parts; A static sealing part is provided between the sealing sleeve and the cutting head shaft. Multiple static sealing parts are provided and arranged at intervals along the axial direction. The connection between the first water passage and the water inlet channel is provided between two adjacent static sealing parts.

[0007] Preferably, a first bearing is provided between the sealing sleeve and the bearing sleeve in the radial direction, and a plurality of first bearings are arranged in the axial direction, and the rotary seal is provided between two adjacent first bearings.

[0008] Preferably, it further includes: A cylindrical body is fixedly fitted to the bearing sleeve and sleeved on the radially outer side of the bearing sleeve, and a water inlet is provided on the cylindrical body; A water inlet pipe is installed inside the cylinder and connects the second water passage and the water inlet.

[0009] Preferably, it further includes: An eccentric positioning assembly includes a first eccentric positioning element and a second eccentric positioning element connected to each other; The cylinder body has a first positioning hole extending radially, and the outer wall of the bearing sleeve has a second positioning hole extending radially; the first eccentric positioning member is installed in the first positioning hole, and the second eccentric positioning member is installed in the second positioning hole.

[0010] Preferably, the two eccentric positioning components are arranged opposite each other on both sides of the bearing sleeve in the radial direction, one of the eccentric positioning components is equipped with an oil injection nozzle, and the other eccentric positioning component is equipped with an exhaust valve.

[0011] Preferably, it further includes: A pressure cap is disposed at the opening of the receiving cavity and is fixedly connected to the cutting head shaft. The pressure cap abuts against one end of the water pump shaft. A connector, which connects to the power drive end and the transmission shaft; The spline sleeve is connected to the output shaft and the cutting head shaft.

[0012] Preferably, the input shaft and the output shaft are spaced apart axially, and a connecting channel is provided inside the output shaft. The transmission shaft passes through the connecting channel and connects to the power drive end and the input shaft. A second bearing, an oil seal, and a bearing cover are installed in the connecting channel; the second bearing is radially disposed between the drive shaft and the output shaft; the bearing cover is fixedly connected to the output shaft, and one axial end of the bearing cover abuts against the end of the second bearing facing the water pump; the oil seal is radially disposed between the bearing cover and the drive shaft, and axially disposed on the side of the second bearing facing the water pump.

[0013] The second aspect of this utility model provides a tunneling machine, including the non-telescopic cutting section internal spray as described in any of the above technical solutions.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model's non-retractable cutting section internal spraying mechanism, the reduction mechanism has an input shaft and an output shaft with a speed difference between them; the cutting head shaft is located at the end of the output shaft away from the input shaft, and the output shaft drives the cutting head shaft to rotate; a receiving cavity is formed on the cutting head shaft; a water pump is installed in the receiving cavity, and the water pump rotates together with the cutting head shaft; the water pump has a power drive end and a water pumping channel; an inlet channel and an outlet channel connecting the water pumping channel are formed on the cutting head shaft; a transmission shaft is connected to the power drive end and the input shaft respectively, so that the input shaft drives the water pump to work; a sealing sleeve is fixedly fitted with the cutting head shaft and surrounds the cutting head shaft. On the radial outer side, the sealing sleeve has a first water passage that connects to the water inlet channel; the bearing sleeve rotates with the sealing sleeve and surrounds the radial outer side of the sealing sleeve, and the bearing sleeve has a second water passage that connects to the first water passage. This enables water supply to the water pump, and the water pump is driven by the speed difference between the input shaft and the output shaft. Therefore, there is no need to set up an additional hydraulic oil circuit to drive the water pump, making the overall structure simple and compact, easy to install, reducing leakage risk and cost, facilitating the standardization of the internal spray structure, improving the performance and service life of the tunneling machine, and also facilitating the implementation of internal spraying when the tunneling machine does not have a backup control valve.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of the non-telescopic cutting section spray provided for an embodiment of this utility model; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 A cross-sectional view of the structure of the non-telescopic cutting section spray provided for an embodiment of this utility model; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 A schematic diagram of the structure of the eccentric positioning component in the spray of the non-telescopic cutting section provided in an embodiment of this utility model; Figure 6 A schematic diagram of the eccentric positioning component in the spraying section of the non-telescopic cutting section provided in an embodiment of this utility model from another perspective; Figure 7 A schematic diagram of the structure of the first and second eccentric positioning members in the non-telescopic cutting section spray provided in the embodiment of this utility model, with an eccentricity of A. Figure 8 A schematic diagram of the structure of the first step and the second step of the second eccentric positioning member in the non-telescopic cutting section spray provided in the embodiment of this utility model, with an eccentricity of A.

[0018] Icons: 10-Reduction mechanism; 11-Input shaft; 12-Output shaft; 120-Connecting channel; 20-Cutting head shaft; 21-Water inlet channel; 22-Water outlet channel; 23-Cutting head; 30-Water pump; 31-Power drive end; 32-Transmission shaft; 40-Sealing sleeve; 41-First water passage; 50-Bearing sleeve; 51-Second water passage; 61-Rotary sealing part; 62-Static sealing part; 70-Cylinder body; 71- 72-Water inlet; 801-First positioning hole; 802-Second positioning hole; 81-First eccentric positioning component; 811-Mounting hole; 82-Second eccentric positioning component; 821-First step; 822-Second step; 83-Oil injector; 84-Exhaust valve; 91-First bearing; 92-Second bearing; 93-Oil seal; 94-Bearing cover; 95-Pressure cap; 96-Connector; 97-Spline sleeve. Detailed Implementation

[0019] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0020] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0021] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0022] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0023] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0024] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0025] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0027] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0028] According to a first aspect of the present invention, a non-retractable cutting section internal spray is provided, which includes a deceleration mechanism 10, a cutting head shaft 20, a water pump 30, a transmission shaft 32, and a sealing sleeve 40.

[0029] The specific structure of the spraying component inside the non-telescopic cutting section according to this embodiment will be described below.

[0030] In this embodiment, as Figure 1 and Figure 3As shown, the reduction mechanism 10 has an input shaft 11 and an output shaft 12. The kinetic energy output from the input shaft 11 is transmitted to the output shaft 12 via a planetary gear train or other reduction components, so that the input shaft 11 and the output shaft 12 have a speed difference. The reduction component can be a gear set. The cutting head shaft 20 is located at the end of the output shaft 12 away from the input shaft 11, and the output shaft 12 drives the cutting head shaft 20 to rotate.

[0031] like Figure 3 As shown, a cutting head 23 is mounted on the cutting head shaft 20, and a receiving cavity is provided on the cutting head shaft 20. The receiving cavity can be formed by the end of the cutting head shaft 20 facing the output shaft 12 being recessed inward. A water pump 30 is installed in the receiving cavity. The water pump 30 rotates together with the cutting head shaft 20, so that the output shaft 12 drives the water pump 30 to rotate as a whole. The water pump 30 has a power drive end 31 and a water pumping channel.

[0032] Specifically, the cutting head shaft 20 has an inlet channel 21 and an outlet channel 22 that connect to the pump water channel; the sealing sleeve 40 is formed as a sleeve structure and surrounds the radial outside of the cutting head shaft 20. The sealing sleeve 40 is fixedly engaged with the cutting head shaft 20, so that the sealing sleeve 40 and the cutting head shaft 20 can rotate together. The sealing sleeve 40 has a first water passage 41 that connects to the inlet channel 21; the bearing sleeve 50 is formed as a sleeve structure and surrounds the radial outside of the sealing sleeve 40. The bearing sleeve 50 is rotatably engaged with the sealing sleeve 40. The bearing sleeve 50 has a second water passage 51 that connects to the first water passage 41. In this way, water can sequentially enter the pump water channel through the second water passage 51, the first water passage 41 and the inlet channel 21. The pump works to pressurize the water, thereby outputting high-pressure water to the outlet channel 22.

[0033] It should be noted that a nozzle can be installed at the end of the water outlet channel 22 to convert high-pressure water into water mist and spray it out from the nozzle.

[0034] like Figure 3 As shown, the drive shaft 32 is connected to the power drive end 31 and the input shaft 11 respectively, so that the input shaft 11 drives the water pump 30 to work. In this way, the kinetic energy of the input shaft 11 is transferred to the power drive end 31 by the drive shaft 32, and the speed difference between the input shaft 11 and the output shaft 12 is used to provide driving force for the water pump 30. Thus, there is no need to set up an additional hydraulic oil circuit to drive the water pump 30. Only the water circuit needs to be laid in the cutting part, which makes the overall structure simple and compact, easy to install, reduces the risk of leakage and cost, helps to standardize the internal spray structure, and simplifies the processing of the cutting head shaft 20. Only the water inlet channel 21 needs to be added to improve the structural strength of the cutting head shaft 20 and improve the performance and service life of the internal spray of the telescopic cutting part.

[0035] It should be noted that in this application, the water pump 30 is arranged on the cutting head shaft 20. The advantage of this arrangement is that it requires less modification to the existing deceleration structure and can meet different modification needs.

[0036] In this embodiment, the power input end can be a shaft structure, such as a gear shaft or a shaft with a key structure on its axial outer wall.

[0037] In a preferred embodiment, such as Figure 3 As shown, the rotation axis of the water pump 30 is set parallel to or coincides with the axis of the cutting head shaft 20. This reduces the weakening of the structural strength of the cutting head shaft 20 by the opening of the receiving cavity, thereby improving the performance and service life of the cutting head shaft 20, and also improving its machinability and assembly processability.

[0038] In this embodiment, as Figure 3 As shown, a rotary sealing part 61 is provided between the bearing sleeve 50 and the sealing sleeve 40. Multiple rotary sealing parts 61 are provided and arranged at intervals along the axial direction. The connection between the first water passage 41 and the second water passage 51 is provided between two adjacent rotary sealing parts 61. In this way, the first water passage 41 on the sealing sleeve 40 and the second water passage 51 on the bearing sleeve 50 are sealed together, ensuring that all the water flowing out of the second water passage 51 can enter the first water passage 41.

[0039] Specifically, the rotary seal 61 can be formed by creating an annular groove on the inner wall of the bearing sleeve 50, in which a sealing ring capable of contacting the outer wall of the sealing sleeve 40 is embedded. However, the structure of the rotary seal 61 is not limited to this; an annular groove can also be created on the outer wall of the sealing sleeve 40, so that the sealing ring embedded in the annular groove contacts the inner wall of the bearing sleeve 50.

[0040] In a preferred embodiment, a rotary sealing part 61 is provided on both sides of the connection between the first water channel 41 and the second water channel 51 on the shaft. Since the rotary sealing part 61 has a clamping effect, this arrangement can reduce the starting torque while meeting the sealing requirements. The clamping force is small, which reduces heat generation.

[0041] like Figure 3 As shown, a static sealing part 62 is provided between the sealing sleeve 40 and the cutting head shaft 20. Multiple static sealing parts 62 are provided and arranged at intervals along the axial direction. The connection between the first water passage 41 and the water inlet channel 21 is provided between two adjacent static sealing parts 62. In this way, the first water passage 41 on the sealing sleeve 40 is sealed and connected to the water inlet channel 21 on the cutting head shaft 20, ensuring that all the water flowing out of the first water passage 41 can enter the water pump 30 through the water inlet channel 21.

[0042] Furthermore, in this embodiment, as Figure 3As shown, a first bearing 91 is provided between the sealing sleeve 40 and the bearing sleeve 50 in the radial direction. Multiple first bearings 91 are arranged axially. All rotating sealing parts 61 are provided between two adjacent first bearings 91 to support the relative rotation of the sealing sleeve 40 and the bearing sleeve 50.

[0043] In this embodiment, as Figures 1 to 3 As shown, the non-telescopic cutting section spray also includes a cylinder 70 and a water inlet pipe 72. The cylinder 70 is formed as a cylindrical structure sleeved on the radially outer side of the bearing sleeve 50. The cylinder 70 is fixedly fitted with the bearing sleeve 50 and a water inlet 71 is provided on the cylinder 70. The water inlet pipe 72 is located inside the cylinder 70 and connects the second water passage 51 and the water inlet 71, so that external water source is injected into the water inlet pipe 72 through the water inlet 71, and the water inlet pipe 72 transports water to the second water passage 51.

[0044] Preferably, the inlet pipe 72 is provided with connectors at both ends to facilitate the connection between the inlet pipe 72 and the cylinder 70 and the bearing sleeve 50.

[0045] Furthermore, in this embodiment, as Figure 1 and Figure 2 As shown, the non-telescopic cutting section spray also includes an eccentric positioning assembly, which includes a first eccentric positioning member 81 and a second eccentric positioning member 82 connected to each other; a first positioning hole 801 extending radially is provided on the cylinder 70, and a second positioning hole 802 extending radially is provided on the outer wall of the bearing sleeve 50; the first eccentric positioning member 81 is installed in the first positioning hole 801, and the second eccentric positioning member 82 is installed in the second positioning hole 802, so as to adjust the different axiality between the sealing sleeve 40 and the cylinder 70, thereby reducing the machining accuracy of the fixed shaft holes at both ends of the cylinder 70.

[0046] Specifically, such as Figures 5 to 8As shown, the portion of the first eccentric positioning member 81 that mates with the cylinder 70 is formed as a flange structure with multiple mounting holes 811. Fasteners such as screws pass through the mounting holes 811 and connect to the openings on the cylinder 70. The end of the first eccentric positioning member 81 facing the second eccentric positioning member 82 has a groove, and the circumferential outer wall of the second eccentric positioning member 82 has a boss, so that the end of the second eccentric positioning member 82 that connects with the groove on the first eccentric positioning member 81 forms a first stepped portion 821, and the end of the second eccentric positioning member 82 that connects with the bearing sleeve 50 forms a second stepped portion. 822, the axis of the first eccentric positioning member 81 is eccentrically set with respect to the axis of the first step portion 821, and the eccentricity between them is A, in mm; the axis of the first step portion 821 is eccentrically set with respect to the axis of the second step portion 822, and the eccentricity between them is A, in mm; before fixing the first eccentric positioning member 81 to the cylinder 70, rotate the flange structure as described above to adjust the eccentricity between the cylinder 70 and the second eccentric positioning member 82. After adjusting to the required position, select a suitable mounting hole 811 to fix the first eccentric positioning member 81 onto the cylinder 70. It should be noted that the adjustment range of the eccentricity is 0 to 2A.

[0047] like Figure 2 , Figures 5 to 8 Two eccentric positioning components are arranged opposite each other on both sides of the bearing sleeve 50 in the radial direction to restrict the rotation of the bearing sleeve 50.

[0048] In a preferred embodiment, the eccentric positioning assembly has a channel connecting the first bearing 91 between the bearing sleeve 50 and the sealing sleeve 40. One of the two eccentric positioning assemblies is equipped with an oil injection nozzle 83 to enable the connection of lubricating oil, allowing the lubricating oil to flow to the first bearing 91. The other eccentric positioning assembly is equipped with an exhaust valve 84 to allow gas to be discharged, thus meeting the requirements for smooth injection of lubricating oil.

[0049] It should be noted that lubrication channels can be opened on the bearing sleeve 50 or the sealing sleeve 40 to connect the first bearings 91 on both sides of the axial direction of the rotating seal 61, so as to meet the lubrication needs of all the first bearings 91.

[0050] In this embodiment, as Figure 4 As shown, the non-retractable cutting section internal spray also includes a pressure cap 95, a connector 96, and a spline sleeve 97. The pressure cap 95 is located at the opening of the receiving cavity and is fixedly connected to the cutting head shaft 20. The pressure cap 95 abuts against one axially upward end of the water pump 30 to fix the water pump 30 inside the receiving cavity of the cutting head shaft 20. The pressure cap 95 and the cutting head shaft 20 can be fixed by fasteners such as screws. The pressure cap 95 is formed into a ring structure to allow the power drive end 31 to extend.

[0051] like Figure 4As shown, the connector 96 is connected to the power drive end 31 and the transmission shaft 32. The connector 96 can be a cylindrical structure with a key structure on its inner wall, so that the power drive end 31 and the transmission shaft 32 can rotate synchronously.

[0052] like Figure 4 As shown, the spline sleeve 97 is connected to the output shaft 12 and the cutting head shaft 20 respectively. The spline sleeve 97 is formed as a cylindrical structure that fits on the circumferential outer wall of part of the output shaft 12 and part of the cutting head shaft 20, and its inner wall is provided with a protruding spline structure, thus restricting the circumferential displacement of the cutting head shaft 20 and the output shaft 12. A radially extending through hole can be opened on the spline sleeve 97, and fasteners such as screws pass through the through hole to connect to the output shaft 12 and / or the cutting head shaft 20 to achieve axial upward position fixation.

[0053] Preferably, such as Figure 3 As shown, the input shaft 11 and the output shaft 12 are spaced apart axially. The output shaft 12 has a connecting channel 120 inside, and the drive shaft 32 passes through the connecting channel 120 and connects to the power drive end 31 and the input shaft 11. Preferably, the drive shaft 32 is coaxially arranged with the output shaft 12 and the telescopic shaft.

[0054] like Figure 4 As shown, a second bearing 92, an oil seal 93, and a bearing cover 94 are installed in the connecting channel 120. The second bearing 92 is radially positioned between the drive shaft 32 and the output shaft 12, so that the second bearing 92 contacts the outer wall of the drive shaft 32 and the connecting channel 120 on the output shaft 12 to provide support. The bearing cover 94 and the output shaft 12 can be fixedly connected by fasteners such as screws. One axial end of the bearing cover 94 abuts against the end of the second bearing 92 facing the water pump 30, thereby limiting the axial movement of the bearing. The end of the second bearing 92 facing away from the water pump 30 can be axially limited by a boss on the connecting channel 120. The bearing cover 94 is formed into a cylindrical structure for the drive shaft 32 to pass through.

[0055] Preferably, the lubrication system on the reduction mechanism 10 provides lubricating oil to the second bearing 92, so that there is no need to set up an additional lubricating oil supply unit for the second bearing 92. In the radial direction, the oil seal 93 is disposed between the bearing cover 94 and the drive shaft 32, and in the axial direction, the oil seal 93 is disposed on the side of the second bearing 92 facing the water pump 30.

[0056] In a preferred embodiment, such as Figure 3 As shown, the rotation axis of the water pump 30, the rotation axis of the transmission shaft 32, the rotation axis of the input shaft 11, and the rotation axis of the output shaft 12 are arranged to coincide, which makes the overall structure more compact and reduces the volume.

[0057] The non-retractable internal spraying mechanism of this utility model has a reasonable structural layout, good manufacturability, and is conducive to production and widespread application. The reduction mechanism 10 has an input shaft 11 and an output shaft 12, with a speed difference between them. The cutting head shaft 20 is located at the end of the output shaft 12 away from the input shaft 11, and the output shaft 12 drives the cutting head shaft 20 to rotate. A receiving cavity is provided on the cutting head shaft 20. A water pump 30 is installed in the receiving cavity and rotates together with the cutting head shaft 20. The water pump 30 has a power drive end 31 and a water pumping channel. The cutting head shaft 20 has an inlet channel 21 and an outlet channel 22 connecting the water pumping channel. A transmission shaft 32 connects the power drive end 31 and the input shaft 11, enabling the input shaft 11 to drive the water pump. Pump 30 operates; sealing sleeve 40 is fixedly fitted with cutting head shaft 20 and surrounds the radial outer side of cutting head shaft 20. A first water passage 41 connecting to water inlet channel 21 is opened on sealing sleeve 40; bearing sleeve 50 is rotatably fitted with sealing sleeve 40 and surrounds the radial outer side of sealing sleeve 40. A second water passage 51 connecting the first water passage 41 is opened on bearing sleeve 50. In this way, water is supplied to pump 30. The speed difference between input shaft 11 and output shaft 12 is used to drive pump 30, so there is no need to set up an additional hydraulic oil circuit to drive pump 30. This makes the overall structure simple and compact, easy to install, reduces leakage risk and cost, facilitates the standardization of internal spray structure, and improves the performance and service life of internal spray in non-telescopic cutting section.

[0058] The second aspect of this utility model provides a tunneling machine that includes the non-telescopic cutting section internal spray as described above, thus having all the beneficial effects of the non-telescopic cutting section internal spray, which will not be repeated here.

[0059] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A non-retractable spray nozzle for use within a cutting section, characterized in that, include: A speed reduction mechanism has an input shaft and an output shaft, wherein the input shaft and the output shaft have a speed difference; A cutting head shaft is disposed at the end of the output shaft away from the input shaft, and the output shaft drives the cutting head shaft to rotate; a receiving cavity is provided on the cutting head shaft; A water pump is installed in the receiving cavity. The water pump rotates together with the cutting head shaft. The water pump has a power drive end and a water pumping channel. The cutting head shaft has an inlet channel and an outlet channel that connect to the water pumping channel. A drive shaft is connected to the power drive end and the input shaft respectively, so that the input shaft drives the water pump to work; A sealing sleeve is fixedly fitted to the cutting head shaft and surrounds the radial outer side of the cutting head shaft. The sealing sleeve has a first water passage that connects to the water inlet channel. The bearing sleeve is rotatably fitted with the sealing sleeve and is arranged on the radial outer side of the sealing sleeve. The bearing sleeve has a second water channel that connects to the first water channel.

2. The non-retractable cutting section internal spray according to claim 1, characterized in that, The rotation axis of the water pump is set parallel to or coincides with the axis of the cutting head shaft.

3. The non-retractable cutting section internal spray according to claim 1, characterized in that, A rotary sealing part is provided between the bearing sleeve and the sealing sleeve. Multiple rotary sealing parts are provided and arranged at intervals along the axial direction. The connection between the first water passage and the second water passage is provided between two adjacent rotary sealing parts. A static sealing part is provided between the sealing sleeve and the cutting head shaft. Multiple static sealing parts are provided and arranged at intervals along the axial direction. The connection between the first water passage and the water inlet channel is provided between two adjacent static sealing parts.

4. The non-retractable cutting section internal spray according to claim 3, characterized in that, A first bearing is provided between the sealing sleeve and the bearing sleeve in the radial direction, and a plurality of the first bearings are arranged in the axial direction. The rotary seal is provided between two adjacent first bearings.

5. The non-retractable cutting section internal spray according to claim 1, characterized in that, Also includes: A cylindrical body is fixedly fitted to the bearing sleeve and sleeved on the radially outer side of the bearing sleeve, and a water inlet is provided on the cylindrical body; A water inlet pipe is installed inside the cylinder and connects the second water passage and the water inlet.

6. The non-retractable cutting section internal spray according to claim 5, characterized in that, Also includes: An eccentric positioning assembly includes a first eccentric positioning element and a second eccentric positioning element connected to each other; The cylinder body has a first positioning hole extending radially, and the outer wall of the bearing sleeve has a second positioning hole extending radially; the first eccentric positioning member is installed in the first positioning hole, and the second eccentric positioning member is installed in the second positioning hole.

7. The non-retractable cutting section internal spray according to claim 6, characterized in that, The two eccentric positioning components are arranged opposite each other on both sides of the bearing sleeve in the radial direction, one of the eccentric positioning components is equipped with an oil injection nozzle, and the other eccentric positioning component is equipped with an exhaust valve.

8. The non-retractable cutting section internal spray according to claim 1, characterized in that, Also includes: A pressure cap is disposed at the opening of the receiving cavity and is fixedly connected to the cutting head shaft. The pressure cap abuts against one end of the water pump shaft. A connector, which connects to the power drive end and the transmission shaft; The spline sleeve is connected to the output shaft and the cutting head shaft.

9. The non-retractable cutting section internal spray according to claim 1, characterized in that, The input shaft and the output shaft are axially spaced apart. The output shaft has a connecting channel inside, and the transmission shaft passes through the connecting channel to connect with the power drive end and the input shaft. A second bearing, an oil seal, and a bearing cover are installed in the connecting channel; the second bearing is radially disposed between the drive shaft and the output shaft; the bearing cover is fixedly connected to the output shaft, and one axial end of the bearing cover abuts against the end of the second bearing facing the water pump; the oil seal is radially disposed between the bearing cover and the drive shaft, and axially disposed on the side of the second bearing facing the water pump.

10. A tunneling machine, characterized in that, Including the non-retractable cutting section spray as described in any one of claims 1 to 9.

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