High-bearing-capacity shaft type duplex hob with blades operating independently

Abstract

The invention discloses a high-bearing-capacity shaft type duplex hob with each blade operating independently, and belongs to the field of shaft type duplex hobs, the high-bearing-capacity shaft type duplex hob comprises a main shaft, a first auxiliary shaft and a second auxiliary shaft are arranged on the main shaft, a first hob is arranged on the first auxiliary shaft, a second hob is arranged on the second auxiliary shaft, and the first hob and the second hob are connected with the first auxiliary shaft and the second auxiliary shaft through independent operating mechanisms respectively. The respective independent operation mechanisms of the hob I and the hob II are symmetrically arranged relative to the middle of the main shaft; the two ends of the main shaft are provided with assembled shaft heads; the independent operation mechanism comprises symmetrically-arranged rotating structures, the first hob is connected with the first auxiliary shaft through the symmetrically-arranged rotating structures, and the second hob is connected with the second auxiliary shaft through the symmetrically-arranged rotating structures. By the adoption of the high-bearing-capacity shaft type duplex hob with the blades operating independently, the problems that an existing hob is weak in bearing capacity, cannot meet the high-strength tunneling requirement and is short in service life are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shaft type double cutter, in particular to a high bearing each blade independent operation shaft type double cutter. BACKGROUND

[0002] The shaft type double cutter is mainly used for tunneling in full section hard rock stratum or composite stratum. It is the main cutter of a tunnel boring machine (TBM) for breaking rock. As the first layer of cutter, it rolls and crushes the rock surface first during tunneling. When working, the rotating device drives the cutter to rotate around the central shaft, and through the extrusion and shearing action of the cutter on the rock mass, the rock mass is broken, thereby cutting a series of concentric circles on the rock surface. The shaft type double cutter is a high-performance cutter specially designed for hard rock tunneling.

[0003] The existing cutter adopts a tapered roller bearing. Due to insufficient internal space, the bearing has low bearing capacity, which results in weak load capacity and cannot meet the needs of high-strength tunneling, and is prone to damage, thereby reducing the service life. SUMMARY

[0004] The purpose of the present application is to provide a high bearing each blade independent operation shaft type double cutter to solve the problem of weak load capacity of the existing cutter, which cannot meet the needs of high-strength tunneling and has a low service life.

[0005] To achieve the above purpose, the present application provides a high bearing each blade independent operation shaft type double cutter, which comprises a main shaft, a first auxiliary shaft and a second auxiliary shaft arranged on the main shaft, a first cutter arranged on the first auxiliary shaft, and a second cutter arranged on the second auxiliary shaft. The first cutter and the second cutter are respectively connected to the first auxiliary shaft and the second auxiliary shaft through independent operation mechanisms. The independent operation mechanisms of the first cutter and the second cutter are symmetrically arranged about the middle of the main shaft. Both ends of the main shaft are provided with assembly type shaft heads. The independent operation mechanism comprises symmetrically arranged rotating structures. The first cutter is connected to the first auxiliary shaft through the symmetrically arranged rotating structures, and the second cutter is connected to the second auxiliary shaft through the symmetrically arranged rotating structures.

[0006] Preferably, the first auxiliary shaft and the second auxiliary shaft are each provided with a vertical oil channel one. The bottom end of the vertical oil channel one is in communication with the top end of a vertical oil channel two. The bottom end of the vertical oil channel two is in communication with one end of a horizontal oil channel. The horizontal oil channel is in communication with the outside. The vertical oil channel two and the horizontal oil channel are located in the main shaft.

[0007] Preferably, a piston is arranged in the horizontal oil channel. The piston is sealingly connected to the horizontal oil channel through double sealing rings. A plug one is arranged at the communication position of the horizontal oil channel with the outside. A B-shaped hole elastic retainer ring is arranged on the side of the plug one close to the outside. The piston is located on the side of the plug one away from the B-shaped hole elastic retainer ring.

[0008] Preferably, O-shaped rings one are arranged at the connection positions of the first auxiliary shaft, the second auxiliary shaft and the main shaft.

[0009] Preferably, the rotating structure comprises an outer steel bowl, the inner side of the outer steel bowl is rotatably connected with the first auxiliary shaft or the second auxiliary shaft through a plurality of rolling columns arranged in an annular array.

[0010] Preferably, one side of the outer steel bowl is rotatably connected with the first auxiliary shaft or the second auxiliary shaft through a flat roller thrust bearing, the other side of the outer steel bowl is provided with a floating seal, the flat roller thrust bearing comprises a bearing support frame, a plurality of rolling columns are arranged in an annular array on the bearing support frame.

[0011] Preferably, an end cover is arranged on the floating seal, the end cover is locked and connected with the first auxiliary shaft or the second auxiliary shaft through a screw, an O-ring No. 2 is arranged at the connection between the end cover and the first auxiliary shaft or the second auxiliary shaft, a locking ring is arranged on the end cover; an oil channel opening is arranged on the end cover, a plug No. 2 is arranged at the oil channel opening.

[0012] Preferably, the first rolling cutter comprises a cutter body No. 1, a cutter ring is arranged on the outer side of the cutter body No. 1, a stop ring for fixing the cutter ring is arranged on the cutter body No. 1, the inner side of the cutter body No. 1 is connected with the locking ring at both ends, the inner side of the cutter body No. 1 is connected with the outer steel bowl in the middle, and an O-ring No. 3 is arranged at the connection between the cutter body No. 1 and the outer steel bowl.

[0013] Preferably, the second rolling cutter comprises a cutter body No. 2, a cutter ring is arranged on the outer side of the cutter body No. 2, a stop ring for fixing the cutter ring is arranged on the cutter body No. 2, the inner side of the cutter body No. 2 is connected with the locking ring at both ends, the inner side of the cutter body No. 2 is connected with the outer steel bowl in the middle, and an O-ring No. 3 is arranged at the connection between the cutter body No. 2 and the outer steel bowl; a plurality of strong magnets are arranged in an annular array on the cutter body No. 1 and the cutter body No. 2.

[0014] Preferably, the inner side of the cutter ring is connected with the cutter body No. 1 or the cutter body No. 2, a plurality of alloy cutter heads are arranged in an annular array on the outer side of the cutter ring, and a wear-resistant ring layer is arranged on the outer side of the cutter ring.

[0015] Therefore, the high-load independent-running shaft type double rolling cutter with the above structure has the following beneficial effects:

[0016] 1. The high-load independent-running shaft type double rolling cutter has one main shaft connected with two groups of rolling cutters, the cutter body of each rolling cutter is rotatably connected with the rolling column and the flat roller thrust bearing, the rolling cutter is rotatably connected with the rolling column (radial force) and the flat roller thrust bearing (axial force) of the end surface, the rolling cutter is connected with the rolling column and the flat roller thrust bearing through the locking ring, and the load borne by the rolling cutter is transmitted to the rolling column and the flat roller thrust bearing, so that the load bearing capacity is greatly improved.

[0017] 2. The shaft head at both ends of the main shaft is in a split type, the size of the shaft head of the main shaft is not affected by the internal flat roller thrust bearing assembly, the interface size is met, the split type can improve the interchangeability of the cutter structure, the interface size of different cutters can be met by replacing the shaft head accessory, the design modification is simplified, and the universality is improved.

[0018] 3、The application adopts one main shaft connecting two groups of independent hobs, which can improve the load capacity, and the two groups of hobs are not connected internally, and the cutting edges have no influence on each other.

[0019] The technical solutions of the application are described in further detail below with reference to the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0021] Figure 2 It is a sectional view of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0022] Figure 3 It is a main shaft structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0023] Figure 4 It is a main shaft upper sub-shaft one structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0024] Figure 5 It is a main shaft upper sub-shaft one and sub-shaft two structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0025] Figure 6 It is an assembly type shaft head structure schematic diagram of the main shaft of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0026] Figure 7 It is a floating sealing structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0027] Figure 8 It is a main shaft upper end cover structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0028] Figure 9 It is a rolling column structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0029] Figure 10 It is a sub-shaft upper plane roller thrust bearing structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0030] Figure 11 It is a plane roller thrust bearing structure schematic diagram of the embodiment of the high-bearing independent-blade rotating shaft type double hobs of the application.

[0031] Figure 12Fig. 1 is a schematic diagram of the outer steel bowl structure on the rolling column of the high-bearing capacity each-blade independent operation shaft type double cutter embodiment of the present application;

[0032] Figure 13 Fig. 2 is a schematic diagram of the locking ring structure of the high-bearing capacity each-blade independent operation shaft type double cutter embodiment of the present application;

[0033] Figure 14 Fig. 3 is a schematic diagram of the cutter body structure of the high-bearing capacity each-blade independent operation shaft type double cutter embodiment of the present application;

[0034] Figure 15 Fig. 4 is a schematic diagram of the end cap upper plug two structure of the high-bearing capacity each-blade independent operation shaft type double cutter embodiment of the present application.

[0035] In the figure: 1, main shaft; 2, locking nut; 3, sub-shaft one; 4, sub-shaft two; 5, cutter one; 6, cutter two; 7, assembled shaft head; 8, vertical oil passage one; 9, vertical oil passage two; 10, horizontal oil passage; 11, piston; 12, double sealing ring; 13, plug one; 14, B-shaped hole elastic retainer ring; 15, O-ring one; 16, outer steel bowl; 17, rolling column; 18, flat roller thrust bearing; 19, bearing support frame; 20, roller; 21, floating seal; 22, O-ring two; 23, end cap; 24, screw; 25, locking ring; 26, oil passage opening; 27, plug two; 28, cutter body one; 29, cutter ring; 30, retainer ring; 31, strong magnet; 32, cutter body two; 33, alloy cutter head; 34, wear-resistant ring layer; 35, O-ring three. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments disclosed by the present application clearer, the embodiments of the present application are further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application. Examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout.

[0037] It should be noted that the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] Like numbers and labels refer to like items in all figures, so once an item is defined in one figure, it should not require further defining or explaining in subsequent figures.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , a high load each blade independent operation shaft type double cutter of the present application, comprising a main shaft 1, the main shaft 1 is provided with a sub shaft one 3 and a sub shaft two 4, the main shaft 1 is provided with a locking nut 2 to lock the sub shaft one 3 and the sub shaft two 4. The sub shaft one 3 and the sub shaft two 4 are provided with vertical oil channel one 8, the bottom end of the vertical oil channel one 8 is communicated with the top end of the vertical oil channel two 9. The bottom end of the vertical oil channel two 9 is communicated with one end of the horizontal oil channel 10, the horizontal oil channel 10 is communicated with the outside, the vertical oil channel two 9 and the horizontal oil channel 10 are located in the main shaft 1. The horizontal oil channel 10 is provided with a piston 11, the piston 11 is sealedly connected with the horizontal oil channel 10 through double sealing ring 12, the horizontal oil channel 10 is provided with a plug one 13 at the communicated part with the outside. The side of the plug one 13 close to the outside is provided with a B-shaped hole elastic baffle ring 14, the piston 11 is located at the side of the plug one 13 away from the B-shaped hole elastic baffle ring 14. The connection part of the sub shaft one 3 and the sub shaft two 4 with the main shaft 1 is provided with an O-shaped ring one 15. As shown in Figure 6 , both ends of the main shaft 1 are provided with assembly type shaft head 7. When the external pressure is large, the mud enters through the center hole of the plug one 13, pushes the piston 11 to move, and then pressurizes the internal lubricating oil, which is communicated with the inside of the cutter through the vertical oil channel two 9, so as to realize the transmission of pressure and maintain the balance of pressure.

[0042] The first sub-shaft 3 is provided with a hob 5, and the second sub-shaft 4 is provided with a hob 6. The hobs 5 and 6 are connected to the first sub-shaft 3 and the second sub-shaft 4 respectively through independent running mechanisms. The independent running mechanisms of the hobs 5 and 6 are symmetrically arranged about the middle of the main shaft 1. The independent running mechanisms include symmetrically arranged rotating structures. The hob 5 is connected to the first sub-shaft 3 through the symmetrically arranged rotating structures, and the hob 6 is connected to the second sub-shaft 4 through the symmetrically arranged rotating structures.

[0043] As shown in Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 The rotating structure includes an outer steel bowl 16. The inner side of the outer steel bowl 16 is rotatably connected to the first sub-shaft 3 or the second sub-shaft 4 through a plurality of rolling columns 17 arranged in an annular array. One side of the outer steel bowl 16 is rotatably connected to the first sub-shaft 3 or the second sub-shaft 4 through a planar roller thrust bearing 18, and the other side of the outer steel bowl 16 is provided with a floating seal 21. As shown in Figure 11 The planar roller thrust bearing 18 includes a bearing support frame 19, and a plurality of rollers 20 are arranged in an annular array on the bearing support frame 19. The floating seal 21 is provided with an end cover 23, and the end cover 23 is locked and connected to the first sub-shaft 3 or the second sub-shaft 4 through a screw 24. An O-ring 22 is arranged at the connection between the end cover 23 and the first sub-shaft 3 or the second sub-shaft 4 to prevent leakage along the mating surface. The end cover 23 is provided with a locking ring 25.

[0044] As shown in Figure 15 The end cover 23 is provided with an oil passage 26, and the oil passage 26 is provided with a plug 27. The oil passage 26 is an inlet for injecting lubricating oil. The lubricating oil enters the planar roller thrust bearing 18 and other components for lubrication through the oil passage 26, and then flows into the main shaft 1 through a vertical oil passage 8.

[0045] As shown in Figure 1 、 Figure 2 、 Figure 14As shown, the first cutter 5 includes a cutter body 28, the outer side of the cutter body 28 is provided with a cutter ring 29, and the cutter body 28 is provided with a stop ring 30 for fixing the cutter ring 29. The inner side of the cutter body 28 is connected with the locking ring 25 at both ends, and the inner side of the cutter body 28 is connected with the outer steel bowl 16 in the middle, and the connection between the cutter body 28 and the outer steel bowl 16 is provided with an O-ring 35. The second cutter 6 includes a cutter body 32, the outer side of the cutter body 32 is provided with a cutter ring 29, and the cutter body 32 is provided with a stop ring 30 for fixing the cutter ring 29. The inner side of the cutter body 32 is connected with the locking ring 25 at both ends, and the inner side of the cutter body 32 is connected with the outer steel bowl 16 in the middle, and the connection between the cutter body 32 and the outer steel bowl 16 is provided with an O-ring 35. The cutter body 28 and the cutter body 32 are both provided with a plurality of strong magnets 31 arranged in a ring shape. The strong magnets 31 are feedback signal sources for rotation detection, and the rotation state is reflected through the feedback magnetic signal.

[0046] The inner side of the cutter ring 29 is connected with the cutter body 28 or the cutter body 32, and the outer side of the cutter ring 29 is provided with a plurality of alloy cutter heads 33 arranged in a ring shape, and the outer side of the cutter ring 29 is provided with a wear-resistant ring layer 34.

[0047] When tunneling, the rock reaction force drives the cutter ring 29 to rotate, thereby driving the cutter body 28, the cutter body 32, the roller 20, and the floating seal 21 to rotate together, the cutter ring 29 breaks the rock, the cutter body 28 and the cutter body 32 are support members, and the roller 20 is a rotary support member. The main shaft 1 and the end cover 23 do not rotate, the main shaft 1 is a support and rotary shaft of the whole cutter, and the end cover 23 supports the floating seal 21.

[0048] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: it can still modify or equivalently replace the technical solutions of the present application, and these modifications or equivalent replacements also cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A high load capacity, independently operable, shaft mounted double gear hobbing cutter characterized by: The main shaft is provided with a secondary shaft I and a secondary shaft II, the secondary shaft I is provided with a hob I, the secondary shaft II is provided with a hob II, the hob I and the hob II are connected with the secondary shaft I and the secondary shaft II through independent running mechanisms respectively, the independent running mechanisms of the hob I and the hob II are symmetrically arranged about the middle of the main shaft, and both ends of the main shaft are provided with assembled shaft heads.

2. The high load capacity, independently operable, shafted, double gear wheel hob according to claim 1, characterized in that: The secondary shaft I and the secondary shaft II are both provided with a vertical oil channel I, the bottom end of the vertical oil channel I is communicated with the top end of a vertical oil channel II, the bottom end of the vertical oil channel II is communicated with one end of a horizontal oil channel, the horizontal oil channel is communicated with the outside, and the vertical oil channel II and the horizontal oil channel are both located in the main shaft.

3. The high load capacity, independently operable, shafted double gear hob according to claim 2, characterized in that: A piston is arranged in the horizontal oil channel and is in sealing connection with the horizontal oil channel through double sealing rings, a plug I is arranged at the communication position of the horizontal oil channel and the outside, a B-shaped hole elastic baffle is arranged on the side of the plug I close to the outside, and the piston is located on the side of the plug I away from the B-shaped hole elastic baffle.

4. The high load capacity, independently operable, shafted double gear hob according to claim 1, characterized in that: O-shaped rings I are arranged at the connection positions of the secondary shaft I, the secondary shaft II and the main shaft.

5. The high load capacity, positive angle, independent blade, dual shaft, gearless double gear hobbing cutter of claim 1 wherein: The rotating structure comprises an outer steel bowl, and the inner side of the outer steel bowl is in rotary connection with the secondary shaft I or the secondary shaft II through a plurality of rolling columns arranged in an annular array.

6. The high load capacity, positive angle, independent blade, dual shaft, double gear wheel type rotary cutter according to claim 5, characterized in that: One side of the outer steel bowl is in rotary connection with the secondary shaft I or the secondary shaft II through a plane roller thrust bearing, the other side of the outer steel bowl is provided with a floating seal, and the plane roller thrust bearing comprises a bearing support frame, and a plurality of rolling columns are arranged in an annular array on the bearing support frame.

7. The high load capacity, positive angle, independent blade, dual shaft, gearless double gear hobbing cutter of claim 6 wherein: An end cover is arranged on the floating seal and is in locking connection with the secondary shaft I or the secondary shaft II through screws, O-shaped rings II are arranged at the connection positions of the end cover and the secondary shaft I or the secondary shaft II, and locking rings are arranged on the end cover.

8. The high load capacity, positive angle, independent blade, dual shaft, gearless double gear hobbing cutter of claim 7 wherein: The hob I comprises a cutter body I, the outer side of the cutter body I is provided with a cutter ring, the cutter body I is provided with a baffle for fixing the cutter ring, the inner side of the cutter body I is connected with the locking ring at both ends, the inner side of the cutter body I is connected with the outer steel bowl in the middle, and O-shaped rings III are arranged at the connection positions of the cutter body I and the outer steel bowl.

9. The high load capacity, positive angle, independent blade, dual shaft, gearless double gear hobbing cutter of claim 8 wherein: The hob II comprises a cutter body II, the outer side of the cutter body II is provided with a cutter ring, the cutter body II is provided with a baffle for fixing the cutter ring, the inner side of the cutter body II is connected with the locking ring at both ends, the inner side of the cutter body II is connected with the outer steel bowl in the middle, and O-shaped rings III are arranged at the connection positions of the cutter body II and the outer steel bowl; a plurality of strong magnets are arranged in an annular array on the cutter body I and the cutter body II.

10. The high load capacity, positive angle, independent blade, dual shaft, double gear wheel type rotary cutter according to claim 9, characterized in that: The inner side of the cutter ring is connected with the cutter body I or the cutter body II, the outer side of the cutter ring is arranged with a plurality of alloy cutter heads in an annular array, and the outer side of the cutter ring is provided with a wear-resistant ring layer.

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