CN110529133A - A kind of TBM disk cutter of cutter ring excircle fluting - Google Patents

Abstract

The invention discloses a TBM disc-shaped hob with grooves on the outer circumference of the cutter ring, including a cutter ring, a cutter body, a retaining ring, a bearing, a rigid mandrel, a bearing end cover and a sealing ring, and the cutter ring is fixed on the cutter body through the retaining ring Above, the cutter is connected to the bearing, the bearing end cover and the sealing ring seal and fix the bearing on the rigid mandrel, a TBM disc-shaped hob with grooves on the outer circumference of the cutter ring, using a new structure of the rock-breaking hob cutter ring; The cutter body, the bearing and the bearing end cover are assembled on the shaft, and a sealing ring is used to seal the internal oil liquid between the cutter body and the bearing end cover. There is a step on the outer ring of the cutter for positioning the cutter ring; the invention can control the compact The shape of the core changes the stress distribution to form lateral cracks, which is beneficial to the generation and expansion of lateral cracks, reduces the energy consumption of rock breaking, effectively enhances the ability of rock breaking, and improves the efficiency of rock breaking.

Description

A TBM disc hob with grooves on the outer circumference of the cutter ring

technical field

The invention relates to the technical field of tunneling construction machinery, in particular to a TBM disc-shaped hob with grooves on the outer circumference of the cutter ring.

Background technique

The full name of the shield tunnel boring machine (TBM) is a professional construction machine for tunnel excavation. It has the characteristics of advanced, environmental protection, and high efficiency. Therefore, it is widely used in tunnel excavation construction of urban subways, railways, water conservancy and hydropower projects. in work.

In the tunneling process, its key role is the TBM disc hob. It is installed on the cutter head panel and arranged with different trajectory radii along the radial direction of the cutter head. The disc-shaped hob cutter ring is the key part and easy-to-wear part of the disc-shaped hob. During the operation, it directly contacts the rock, relying on the extrusion force generated when the cutter head rotates and advances, the disc-shaped hob cutter ring penetrates into the rock and make it broken.

Existing studies have shown that tensile stress plays a leading role in the rock breaking process; however, the existing hobs mainly produce compressive stress in rock, and the tensile stress produced is relatively small, so the efficiency of breaking hard rock is low. Therefore, it is necessary to design the cutter ring structure to increase the tensile stress in the rock in order to improve the rock breaking efficiency.

Contents of the invention

The object of the present invention is to provide a TBM disc-shaped hob with grooves on the outer circumference of the cutter ring, which can open grooves on the outer circumference of the hob cutter ring according to the rock-breaking mechanism and working condition characteristics of the TBM hob, and change the The distribution of the dense core and stress field inside the rock under the action of the knife increases the lateral tensile stress, which is conducive to the penetration of lateral cracks between multiple hobs and the peeling of rock slices, so as to replace the existing knife ring structure that produces insufficient tensile stress. This design structure is especially aimed at the situation of excavation in high-hard rock, which can improve the efficiency of rock breaking and excavation. The design is simple in structure and has little impact on tool cost.

Embodiments of the present invention are achieved like this:

A new type of structure of a rock-breaking hob cutter ring, which includes: a cutter ring, a cutter body, a retaining ring, a bearing, a rigid mandrel, a bearing end cover and a sealing ring; the outer circumference of the cutter ring is an uneven surface, and the A concave geometric structure is provided on the outer circumference to improve the rock-breaking efficiency of the hob. The concave geometric structure includes depressions, grooves or holes. The ring clamps the cutter ring on the outside of the cutter body and fixes it. The cutter body is connected to the bearing, and the bearing end cover and the sealing ring seal and fix the bearing on the rigid mandrel.

In a preferred embodiment of the present invention, the outer peripheral surface of the cutter ring is a regular surface, and the regular surface is a cylindrical surface or an arc surface.

In a preferred embodiment of the present invention, the number of grooves or holes on the outer circumference of the cutter ring is at least one.

In a preferred embodiment of the present invention, the above-mentioned rigid mandrel is provided with a shaft shoulder for positioning, and the shaft shoulder is formed by a side protrusion of the rigid mandrel, and the bearing end cover is interference fit with the rigid mandrel, and the shaft shoulder holds the bearing One end of the end cap snaps into place.

In a preferred embodiment of the present invention, there is a cavity space between the bearing end cover and the cutter body, and the bearing is placed in the cavity space.

In a preferred embodiment of the present invention, the above-mentioned bearing is a tapered roller bearing, the bearing includes a bearing outer ring, a bearing inner ring and tapered rollers, the bearing inner ring is placed outside the bearing end cover, and the bearing outer ring is fixed on the cutter body On the inner side, tapered rollers are placed between the bearing inner ring and the bearing outer ring.

In a preferred embodiment of the present invention, the inner side of the cutter body is provided with a groove for placing the outer ring of the bearing, and the outer ring of the bearing is snapped into the groove, and the outer side of the cutter body is provided with a slot for snapping in the retaining ring.

In a preferred embodiment of the present invention, the above-mentioned cutter ring is in interference fit with the cutter body, one side of the cutter ring is positioned by a step, and the other side of the cutter ring is locked by a retaining ring.

A TBM disc-shaped hob with grooves on the outer circumference of the cutter ring uses the structure of the above-mentioned novel rock-breaking hob cutter ring.

The beneficial effects of the present invention are:

The present invention controls the shape of the dense core through reasonable blade design, changes the stress distribution through the structure of the non-flat surface of the knife ring, and makes it easier to form lateral cracks, and at the same time reduces the volume of the dense core to reduce the energy consumption of rock breaking. Two close contact areas are produced, and the contact pressures in these two areas affect each other, not only forming the same dense core with a depression in the middle, but also increasing the tensile stress on both sides of the dense core, making the lateral cracks more Easy to expand; the invention can control the shape of the dense core, change the stress distribution, facilitate the generation and expansion of lateral cracks, reduce the energy consumption of rock breaking, effectively enhance the ability of rock breaking, and improve the rock breaking efficiency.

During the rock breaking process of TBM, the hob forms a dense core in the rock mass directly below it. On the one hand, dense cores have a significant impact on the distribution of internal stress in rocks, and then act on the initiation and propagation of cracks; on the other hand, the energy consumed by the formation of dense cores accounts for a high proportion of the total energy consumption of rock breaking by hobs. Therefore, the goal achieved by the present invention is to control the shape of the dense core through reasonable blade design, change the stress distribution to make it easier to form lateral cracks, and reduce the volume of the dense core to reduce the energy consumption of rock breaking.

Through the analysis, it is known that when the cutter ring with the center groove breaks the rock, since there is no contact with the grooved part in the middle of the cutter ring, there is no contact pressure, so the stress value directly below this part is small, and the dense core produced is in this part There is a concave shape, which reduces the volume of the dense core and reduces energy consumption. At the same time, the center-grooved cutter ring is different from the double-edged hob: the contact area between the two blades of the latter is far away and cannot affect each other, so each forms a dense core, which does not improve the rock-breaking efficiency; while for the former, The same blade produces two contact areas that are very close to each other. The contact pressure in these two areas affects each other, not only forming the same dense core with a depression in the middle part, but also increasing the tensile stress on both sides of the dense core, making the side Cracks are easier to propagate.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should be seen as limiting the scope.

Fig. 1 is the structural diagram of the TBM disc-shaped hob that the outer circumference of the novel cutter ring is grooved;

Fig. 2 is an enlarged view at A place in Fig. 1 of the present invention;

Fig. 3 is a three-dimensional view of the cutter ring according to the first embodiment of the present invention;

Fig. 4 is a sectional view of the cutter ring of the first embodiment of the present invention;

Fig. 5 is a sectional view of a cutter ring according to a second embodiment of the present invention;

Fig. 6 is a sectional view of a cutter ring according to a third embodiment of the present invention;

Fig. 7 is a sectional view of a cutter ring according to a fourth embodiment of the present invention;

Fig. 8 is a sectional view of a cutter ring according to a fifth embodiment of the present invention;

Fig. 9 is a sectional view of a cutter ring according to a sixth embodiment of the present invention;

Fig. 10 is a traditional cutter ring construction drawing;

Fig. 11 is the construction drawing of the cutter ring of the present invention;

Icons: 1-groove, 2-cutter ring, 3-retaining ring, 4-cutter body, 5-bearing end cover, 6-sealing ring, 7-tapered roller bearing, 71-bearing outer ring, 72-bearing inner Ring, 73-tapered roller, 8-rigid mandrel, A-the outer edge of the cutter ring.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

first embodiment

Please refer to Fig. 1. This embodiment provides a TBM disc hob with grooves on the outer circumference of the cutter ring, which uses a new structure of a rock-breaking hob cutter ring. The structure includes: a cutter ring 2, a cutter body 4, and a retaining ring 3. Bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6, wherein, cutter body 4, retaining ring 3, bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6 are standard parts; The ring 2 is fixed on the cutter body 4 through the retaining ring 3, the cutter body 4 is connected to the bearing 7, the bearing end cover 5 and the sealing ring 6 seal and fix the bearing 7 on the rigid mandrel 8; the cutter body 4 and the bearing 7, the bearing end cover 5 is assembled on the shaft, and a sealing ring 6 is used to seal the internal oil between the cutter body 4 and the bearing end cover 5. There is a step outside the cutter body 4 for positioning the cutter ring 2. Therefore, the outer side of the cutter body 4 The other side is provided with a card slot, which is used to place the retaining ring 3 to fix both sides of the cutter ring 2. The outer peripheral surface of the cutter ring 2 can be a cylindrical surface, an arc surface or other regular surfaces that meet the requirements. Its structure is adopted in the hob The groove 1 is opened on the outer circumference of the cutter ring 2 to improve the rock-breaking efficiency of the hob. The outer circumference of the cutter ring 2 is processed with a groove 1. The groove 1 can be any shape that meets the processing requirements and technical requirements, and the outer circumference of the cutter ring 2 There is at least one groove 1 on the circumference, which is especially suitable for hard rock strata to realize high-speed excavation. The function of the groove 1 is to make the cracks during rock breaking concentrate and expand to both sides, thereby improving the rock breaking efficiency.

Please refer to Fig. 2, Fig. 3 and Fig. 4, the cutter ring 2 is an annular structure as a whole, the inner side of the cutter ring 2 is a cylindrical annular inner wall, and the outer middle part of the cutter ring 2 protrudes outward, and the protrusion is used for breaking The position of the rock, the convex surface of the cutter ring 2 is its outer peripheral surface, and its surface is a cylindrical side, which is a straight edge in the axial direction of the rigid mandrel 8, and the outer circumference of the cutter ring 2 is an uneven surface, and the cutter ring 2 A groove 1 is provided on the outer circumference of the hob to improve the rock-breaking efficiency of the hob. In this embodiment, the outer circumference of the cutter ring 2 is concavely provided with a groove 1. The cross section of the groove 1 is rectangular, and it surrounds the cutter. The ring 2 is in the form of a ring. Compared with the ordinary ungrooved cutter ring 2, the center grooved cutter ring 2 concentrates the load on both sides, while the load of the ordinary ungrooved cutter ring 2 is concentrated in the center. Therefore, using When the hob assembled from the cutter ring 2 grooved on the outer circumference performs rock breaking operations, rock cracks are more likely to expand and extend to both sides. When the cracks formed by two adjacent hobs meet, the formed rock fragments fall off, which can Improve rock breaking efficiency.

The cutter body 4 is a ring structure as a whole, the inner side and the outer side of the cutter body 4 are respectively the inner side and the outer side of the ring structure, the outer side of the cutter body 4 is stepped and the inner peripheral surface of the cutter ring 2 is stuck at the step, and the retaining ring 3 Fix the cutter ring 2 on the outside of the cutter body 4. The retaining ring 3 is annular and its inner diameter is just locked to the outside of the cutter body 4. One end outside the cutter body 4 is provided with a slot for snapping into the retaining ring 3. It is annular along the circumference of the cutter body 4, and the other end of the outer side of the cutter body 4 is provided with a step. The cutter ring 2 and the cutter body 4 have an interference fit. One side of the cutter ring 2 is positioned by the step, and the other side of the cutter ring 2 is positioned by the retaining ring. 3 is stuck, one end of the inner circumference of the knife ring 2 is stuck at the step, the other end of the inner circumference of the knife ring 2 is located at the edge of the slot, and the retaining ring 3 is stuck in the slot to fix the knife ring 2 , the cutter body 4 is internally connected to the bearing 7, the inner side of the cutter body 4 is provided with a groove for placing the bearing outer ring 71, and the bearing outer ring 71 is snapped into the groove, and the inner side of the cutter body 4 is provided with two grooves, which are just in line with the bearing outer ring 71 are mutually matched and fastened.

There is a cavity space between the bearing end cover 5 and the cutter body 4, and the inner cavity space is oil-sealed with a sealing ring 6 between the cutter body 4 and the bearing end cover 5, and the bearing 7 is placed in the cavity space, and the bearing 7 It is a tapered roller bearing. The bearing 7 includes a bearing outer ring 71, a bearing inner ring 72 and a tapered roller 73. The bearing inner ring 72 is placed on the outer side of the bearing end cover 5, and the outer side of the bearing end cover 5 is provided with a groove and is aligned with the bearing. The inner rings 72 are matched with each other and locked, the bearing outer ring 71 is fixed on the inner side of the cutter body 4, the tapered rollers 73 are placed between the bearing inner ring 72 and the bearing outer ring 71, and the bearing outer ring 71 and the bearing inner ring 72 are respectively opposite to the cone The roller 73 is rotatable, and the bearing cover 5 and the seal ring 6 seal and fix the bearing outer ring 71, the bearing inner ring 72 and the tapered roller 73 on the rigid mandrel 8, and the rigid mandrel 8 is provided with a shaft shoulder for positioning, and the shaft The shoulder is formed by the protrusion on the side of the rigid mandrel 8, and one end of the bearing end cover 5 is stuck on the shaft shoulder, and the shaft shoulder clamps and fixes one end of the bearing end cover 5, and the bearing end cover 5 and the rigid mandrel 8 have an interference fit .

second embodiment

The difference between the second embodiment and the first embodiment lies in the arrangement of the outer peripheral surface of the cutter ring 2 .

Please refer to Fig. 5. This embodiment provides a TBM disc hob with grooves on the outer circumference of the cutter ring, which uses a new structure of a rock-breaking hob cutter ring. The structure includes: a cutter ring 2, a cutter body 4, and a retaining ring 3. Bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6, wherein, cutter body 4, retaining ring 3, bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6 are standard parts; The ring 2 is fixed on the cutter body 4 through the retaining ring 3, the cutter body 4 is connected to the bearing 7, the bearing end cover 5 and the sealing ring 6 seal and fix the bearing 7 on the rigid mandrel 8; the cutter body 4 and the bearing 7, the bearing end cover 5 is assembled on the shaft, and a sealing ring 6 is used to seal the internal oil between the cutter body 4 and the bearing end cover 5. There is a step outside the cutter body 4 for positioning the cutter ring 2. Therefore, the outer side of the cutter body 4 The other side is provided with a card slot, which is used to place the retaining ring 3 to fix both sides of the cutter ring 2. The outer peripheral surface of the cutter ring 2 can be a cylindrical surface, an arc surface or other regular surfaces that meet the requirements. Its structure is adopted in the hob The groove 1 is opened on the outer circumference of the cutter ring 2 to improve the rock-breaking efficiency of the hob. The outer circumference of the cutter ring 2 is processed with a groove 1. The groove 1 can be any shape that meets the processing requirements and technical requirements, and the outer circumference of the cutter ring 2 There is at least one groove 1 on the circumference, which is especially suitable for hard rock strata to realize high-speed excavation. The function of the groove 1 is to make the cracks during rock breaking concentrate and expand to both sides, thereby improving the rock breaking efficiency.

The cutter ring 2 has a ring-shaped structure as a whole. The inner side of the cutter ring 2 is a cylindrical ring-shaped inner wall. The outer middle part of the cutter ring 2 protrudes outwards. Its outer peripheral surface is a cylindrical surface, and it is a straight side in the axial direction of the rigid mandrel 8. The outer circumference of the cutter ring 2 is an uneven surface, and the outer peripheral surface of the cutter ring 2 is provided with a groove 1 structure inwardly. In order to improve the rock-breaking efficiency of the hob, a groove 1 is provided on the outer circumference of the cutter ring 2 in this embodiment. Compared with the cutter ring 2, the cutter ring 2 with the center groove concentrates the load on both sides, while the load of the ordinary non-grooved cutter ring 2 is concentrated at the center. Therefore, the cutter ring 2 with the grooved outer circumference is assembled When the hob performs rock-breaking operations, rock cracks are easier to extend to both sides. When the cracks formed by two adjacent hobs meet, the formed rock fragments will fall off, which can improve the rock-breaking efficiency.

third embodiment

The difference between the third embodiment and the first embodiment lies in the arrangement of the outer peripheral surface of the cutter ring 2 .

Please refer to Fig. 6. This embodiment provides a TBM disc hob with grooves on the outer circumference of the cutter ring, which uses a new structure of a rock-breaking hob cutter ring. The structure includes: a cutter ring 2, a cutter body 4, and a retaining ring 3. Bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6, wherein, cutter body 4, retaining ring 3, bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6 are standard parts; The ring 2 is fixed on the cutter body 4 through the retaining ring 3, the cutter body 4 is connected to the bearing 7, the bearing end cover 5 and the sealing ring 6 seal and fix the bearing 7 on the rigid mandrel 8; the cutter body 4 and the bearing 7, the bearing end cover 5 is assembled on the shaft, and a sealing ring 6 is used to seal the internal oil between the cutter body 4 and the bearing end cover 5. There is a step outside the cutter body 4 for positioning the cutter ring 2. Therefore, the outer side of the cutter body 4 The other side is provided with a card slot, which is used to place the retaining ring 3 to fix both sides of the cutter ring 2. The outer peripheral surface of the cutter ring 2 can be a cylindrical surface, an arc surface or other regular surfaces that meet the requirements. Its structure is adopted in the hob The groove 1 is opened on the outer circumference of the cutter ring 2 to improve the rock-breaking efficiency of the hob. The outer circumference of the cutter ring 2 is processed with a groove 1. The groove 1 can be any shape that meets the processing requirements and technical requirements, and the outer circumference of the cutter ring 2 There is at least one groove 1 on the circumference, which is especially suitable for hard rock strata to realize high-speed excavation. The function of the groove 1 is to make the cracks during rock breaking concentrate and expand to both sides, thereby improving the rock breaking efficiency.

The cutter ring 2 has a ring-shaped structure as a whole. The inner side of the cutter ring 2 is a cylindrical ring-shaped inner wall. The outer middle part of the cutter ring 2 protrudes outwards. Its outer peripheral surface is a cylindrical surface, and it is a straight edge in the axial direction of the rigid mandrel 8. The outer peripheral surface of the cutter ring 2 is an uneven surface, and the outer peripheral surface of the cutter ring 2 is provided with a groove 1 structure inwardly. In order to improve the rock-breaking efficiency of the hob, a groove 1 is provided on the outer circumference of the cutter ring 2 in this embodiment. Compared with the cutter ring 2, the cutter ring 2 with the center groove concentrates the load on both sides, while the load of the ordinary non-grooved cutter ring 2 is concentrated at the center. Therefore, the cutter ring 2 with the grooved outer circumference is assembled When the hob performs rock-breaking operations, rock cracks are easier to extend to both sides. When the cracks formed by two adjacent hobs meet, the formed rock fragments will fall off, which can improve the rock-breaking efficiency.

Fourth embodiment

The difference between the fourth embodiment and the first embodiment lies in the arrangement of the outer peripheral surface of the cutter ring 2 .

Please refer to Figure 7. This embodiment provides a TBM disc hob with grooves on the outer circumference of the cutter ring, which uses a new structure of a rock-breaking hob cutter ring. The structure includes: a cutter ring 2, a cutter body 4, and a retaining ring 3. Bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6, wherein, cutter body 4, retaining ring 3, bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6 are standard parts; The ring 2 is fixed on the cutter body 4 through the retaining ring 3, the cutter body 4 is connected to the bearing 7, the bearing end cover 5 and the sealing ring 6 seal and fix the bearing 7 on the rigid mandrel 8; the cutter body 4 and the bearing 7, the bearing end cover 5 is assembled on the shaft, and a sealing ring 6 is used to seal the internal oil between the cutter body 4 and the bearing end cover 5. There is a step outside the cutter body 4 for positioning the cutter ring 2. Therefore, the outer side of the cutter body 4 The other side is provided with a card slot, which is used to place the retaining ring 3 to fix both sides of the cutter ring 2. The outer peripheral surface of the cutter ring 2 can be a cylindrical surface, an arc surface or other regular surfaces that meet the requirements. Its structure is adopted in the hob The rock-breaking efficiency of the hob is improved by means of depressions on the outer circumference of the cutter ring 2. The outer circumference of the cutter ring 2 is processed with a double-arc concave groove. The concave groove can be any shape that meets the processing requirements and technical requirements, and the outer circumference of the cutter ring 2 There is at least one concave groove on the top, which is especially suitable for hard rock formations to achieve high-speed excavation. The function of the concave groove is to concentrate and expand the cracks during rock breaking to both sides, thereby improving the rock breaking efficiency.

The cutter ring 2 has a ring-shaped structure as a whole. The inner side of the cutter ring 2 is a cylindrical ring-shaped inner wall. The outer middle part of the cutter ring 2 protrudes outwards. Its outer peripheral surface is a double arc surface, which is arc-shaped in the axial direction of the rigid mandrel 8, and the outer circumference of the knife ring 2 is a non-flat surface, and its double-arc central concave geometric structure improves The rock-breaking efficiency of the hob, the double arc surface of the outer circumference of the cutter ring 2 of this embodiment forms a concave groove in the middle, and the concave groove is annular around the cutter ring 2; 2 Concentrate the load on both sides, while the load of ordinary ungrooved cutter ring 2 is concentrated in the center, so when the hob assembled with the outer circumference grooved cutter ring 2 is used for rock breaking operations, rock cracks are easier Extending to both sides, when the cracks formed by two adjacent hobs meet, the formed rock fragments will fall off, which can improve the rock breaking efficiency.

fifth embodiment

The difference between the fifth embodiment and the first embodiment lies in the arrangement of the outer peripheral surface of the cutter ring 2 .

Please refer to Fig. 8. This embodiment provides a TBM disc-shaped hob with grooves on the outer circumference of the cutter ring, which uses the structure of a new rock-breaking hob cutter ring. The structure includes: a cutter ring 2, a cutter body 4, and a retaining ring 3. Bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6, wherein, cutter body 4, retaining ring 3, bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6 are standard parts; The ring 2 is fixed on the cutter body 4 through the retaining ring 3, the cutter body 4 is connected to the bearing 7, the bearing end cover 5 and the sealing ring 6 seal and fix the bearing 7 on the rigid mandrel 8; the cutter body 4 and the bearing 7, the bearing end cover 5 is assembled on the shaft, and a sealing ring 6 is used to seal the internal oil between the cutter body 4 and the bearing end cover 5. There is a step outside the cutter body 4 for positioning the cutter ring 2. Therefore, the outer side of the cutter body 4 The other side is provided with a card slot, which is used to place the retaining ring 3 to fix both sides of the cutter ring 2. The outer peripheral surface of the cutter ring 2 can be a cylindrical surface, an arc surface or other regular surfaces that meet the requirements. Its structure is adopted in the hob The groove 1 is opened on the outer circumference of the cutter ring 2 to improve the rock-breaking efficiency of the hob. The outer circumference of the cutter ring 2 is processed with a groove 1. The groove 1 can be any shape that meets the processing requirements and technical requirements, and the outer circumference of the cutter ring 2 There is at least one groove 1 on the circumference, which is especially suitable for hard rock strata to realize high-speed excavation. The function of the groove 1 is to make the cracks during rock breaking concentrate and expand to both sides, thereby improving the rock breaking efficiency.

The cutter ring 2 has a ring-shaped structure as a whole. The inner side of the cutter ring 2 is a cylindrical ring-shaped inner wall. The outer middle part of the cutter ring 2 protrudes outwards. Its outer peripheral surface is arc-shaped in the axial direction of the rigid mandrel 8, the outer circumference of the cutter ring 2 is an uneven surface, and the outer peripheral surface of the cutter ring 2 is provided with a groove 1 structure inward to improve the rock-breaking performance of the hob. Efficiency, the middle part of the circular arc surface of the outer circumference of the knife ring 2 in this embodiment is provided with a groove 1 inwardly. Compared with ring 2, the center grooved cutter ring 2 can concentrate the load on both sides, while the load of ordinary non-grooved cutter ring 2 is concentrated in the center, therefore, the outer circumference grooved cutter ring 2 is used to assemble When the hob performs rock-breaking operations, rock cracks are easier to extend to both sides. When the cracks formed by two adjacent hobs meet, the formed rock fragments will fall off, which can improve the rock-breaking efficiency.

Sixth embodiment

The difference between the sixth embodiment and the first embodiment lies in the arrangement of the outer peripheral surface of the cutter ring 2 .

Please refer to Figure 9. This embodiment provides a TBM disc hob with grooves on the outer circumference of the cutter ring, which uses a new structure of a rock-breaking hob cutter ring. The structure includes: a cutter ring 2, a cutter body 4, and a retaining ring 3. Bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6, wherein, cutter body 4, retaining ring 3, bearing 7, rigid mandrel 8, bearing end cover 5 and sealing ring 6 are standard parts; The ring 2 is fixed on the cutter body 4 through the retaining ring 3, the cutter body 4 is connected to the bearing 7, the bearing end cover 5 and the sealing ring 6 seal and fix the bearing 7 on the rigid mandrel 8; the cutter body 4 and the bearing 7, the bearing end cover 5 is assembled on the shaft, and a sealing ring 6 is used to seal the internal oil between the cutter body 4 and the bearing end cover 5. There is a step outside the cutter body 4 for positioning the cutter ring 2. Therefore, the outer side of the cutter body 4 The other side is provided with a card slot, which is used to place the retaining ring 3 to fix both sides of the cutter ring 2. The outer peripheral surface of the cutter ring 2 can be a cylindrical surface, an arc surface or other regular surfaces that meet the requirements. Its structure is adopted in the hob The groove 1 is opened on the outer circumference of the cutter ring 2 to improve the rock-breaking efficiency of the hob. The outer circumference of the cutter ring 2 is processed with a groove 1. The groove 1 can be any shape that meets the processing requirements and technical requirements, and the outer circumference of the cutter ring 2 There is at least one groove 1 on the circumference, which is especially suitable for hard rock strata to realize high-speed excavation. The function of the groove 1 is to make the cracks during rock breaking concentrate and expand to both sides, thereby improving the rock breaking efficiency.

The cutter ring 2 has a ring-shaped structure as a whole. The inner side of the cutter ring 2 is a cylindrical ring-shaped inner wall. The outer middle part of the cutter ring 2 protrudes outwards. Its outer peripheral surface is a straight edge in the axial direction of the rigid mandrel 8, the outer circumference of the cutter ring 2 is an uneven surface, and the outer peripheral surface of the cutter ring 2 is provided with a groove 1 structure inward to improve the rock-breaking performance of the hob. Efficiency, the outer circumference of the cutter ring 2 in this embodiment is provided with a plurality of grooves 1 concave inwardly, the cross section of the grooves 1 is rectangular, and there are 5 rectangles spaced successively, which are circular around the cutter ring 2, Compared with ordinary ungrooved cutter ring 2, the center grooved cutter ring 2 can concentrate the load in multiple lateral directions, while the load of ordinary ungrooved cutter ring 2 is concentrated in the center, therefore, using the outer When the hob assembled by the circumferentially grooved cutter ring 2 performs rock breaking operations, rock cracks are more likely to extend to both sides. When the cracks formed by two adjacent hobs meet, the formed rock fragments fall off, which can Improve rock breaking efficiency.

Please refer to Fig. 10 and Fig. 11, which are schematic diagrams of working conditions when using a traditional ungrooved cutter ring 2 for rock breaking work, and which are schematic diagrams of working conditions when using a slotted flat cutter ring 2 for rock breaking work, here When the cracks are extended to both sides, when the cracks generated by adjacent hobs intersect, rock fragments are formed. It can be seen that the cracks formed in the middle of ordinary flat-headed knives tend to expand to the depth. Therefore, unlike ordinary flat-headed knives Compared with the operating conditions during operation, the hob with the groove 1 on the cutter ring 2 can make the cracks generated by adjacent hobs merge faster, so that rock fragments are formed and fall off.

In particular, the groove 1 on the hob cutter ring 2 is not limited to the shape mentioned above, the outer circumference of the cutter ring 2 is discontinuous, and there are grooves 1, holes, or other shapes of depressions along the outer circumference of the cutter ring 2 Formula geometry and any other cutter rings 2 that meet the above-mentioned technical requirements are within the protection scope of the present invention.

To sum up, the example of the present invention controls the shape of the dense core through reasonable blade design, changes the stress distribution through the structure of the non-flat surface of the cutter ring, and makes it easier to form lateral cracks, and at the same time reduces the volume of the dense core to reduce rock breaking. Energy consumption, two contact areas with close distances are generated by the cutter ring, and the contact pressure in these two areas affects each other, not only forming the same dense core with a depression in the middle part, but also increasing the tensile stress on both sides of the dense core , so that the lateral cracks are easier to expand; the invention can control the shape of the dense core, change the stress distribution to form lateral cracks, facilitate the generation and expansion of lateral cracks, effectively enhance the rock-breaking ability and improve the rock-breaking efficiency.

While this specification describes examples of embodiments of the invention, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Those skilled in the art will appreciate that the embodiments described here are to help readers understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical revelations disclosed in the present invention without departing from the essence of the present invention, and these modifications and combinations are still within the protection scope of the present invention.

Claims (9)

1. The structure of a novel rock-breaking hob cutter ring is characterized in that it comprises: a cutter ring, a cutter body, a retaining ring, a bearing, a rigid mandrel, a bearing end cap and a sealing ring; the outer circumference of the cutter ring is Non-flat surface, the outer circumferential surface of the cutter ring is provided with a concave geometric structure inward to improve the rock-breaking efficiency of the hob, the concave geometric structure includes depressions, grooves or holes, and the outside of the cutter body is stepped And the inner circumferential surface of the cutter ring is stuck at the step, the retaining ring fixes the cutter ring on the outside of the cutter body, the cutter is internally connected to the bearing, and the bearing end cover and the sealing ring seal and fix the bearing on the rigid mandrel. 2. The structure of a novel rock-breaking hob cutter ring according to claim 1, wherein the outer peripheral surface of the cutter ring is a regular surface, and the regular surface is a cylindrical surface or an arc surface. 3. The structure of a novel rock-breaking hob cutter ring according to claim 2, wherein the number of depressions, grooves or holes on the outer circumference of the cutter ring is at least one. 4. The structure of a novel rock-breaking hob cutter ring according to claim 3, wherein the rigid mandrel is provided with a shoulder for positioning, and the shoulder is a side protrusion of the rigid mandrel The arrangement is formed, the bearing end cover is in interference fit with the rigid mandrel, and the shaft shoulder clamps and fixes one end of the bearing end cover. 5. The structure of a novel rock-breaking hob cutter ring according to claim 3, characterized in that there is a cavity space between the bearing end cover and the cutter body, and the bearing is placed in the cavity space. 6. The structure of a novel rock-breaking hob cutter ring according to claim 3, wherein the bearing is a tapered roller bearing, and the bearing includes an outer ring of a bearing, an inner ring of a bearing and a tapered roller, The bearing inner ring is placed outside the bearing end cover, the bearing outer ring is fixed inside the cutter body, and the tapered rollers are placed between the bearing inner ring and the bearing outer ring. 7. The structure of a new type of rock-breaking hob cutter ring according to claim 3, characterized in that, the inside of the cutter body is provided with a groove for placing the outer ring of the bearing, and the outer ring of the bearing is snapped into the groove, so that The outside of the cutter body is provided with a slot for snapping into the retaining ring. 8. The structure of a novel rock-breaking hob cutter ring according to claim 3, wherein the cutter ring is in interference fit with the cutter body, one side of the cutter ring is positioned by a step, and the cutter ring The other side of the ring is snapped by the retaining ring. 9. A TBM disc-shaped hob with grooves on the outer circumference of the cutter ring, characterized in that the structure of the novel rock-breaking hob cutter ring according to any one of claims 1-8 is used.