CN211737140U - TBM hob ring for complete hard rock - Google Patents
TBM hob ring for complete hard rock Download PDFInfo
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- CN211737140U CN211737140U CN202020351423.9U CN202020351423U CN211737140U CN 211737140 U CN211737140 U CN 211737140U CN 202020351423 U CN202020351423 U CN 202020351423U CN 211737140 U CN211737140 U CN 211737140U
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- cutter ring
- hard rock
- narrow
- complete hard
- ring
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Abstract
The utility model discloses a TBM hobbing cutter ring for complete hard rock, including the cutter ring, the cutter ring is including ring form cutter ring supporting body (1) excircle is provided with standard sword wide part (2) excircle is provided with narrow cutting part (3). The utility model has the advantages of simple structure, use reliably, low cost, adopt it not only to improve broken rock degree of penetration by a wide margin, and same hobbing cutter ring is used for complete hard rock section tunnelling earlier moreover, and when wearing and tearing were great to the sword width, it got off to change and is used for tunnelling under the geological conditions usually again, when improving complete hard rock section TBM tunnelling speed, has reduced cutter consumption cost.
Description
Technical Field
The utility model relates to a TBM hobbing cutter, especially a TBM hobbing cutter ring for complete hard rock.
Background
At present, complete hard rock is often encountered in the construction process of a Tunnel Boring Machine (TBM), the penetration degree of a hob on a cutter head is very small and can only reach about 1mm/r, so that the tunneling efficiency is very low, the tunneling speed can even be reduced to 0.3-0.5 m/h and is far less than that under the normal condition, and the tunnel construction period and the cost are seriously influenced. In order to improve the penetration of the hob and improve the tunneling efficiency, the key of the existing improvement of the penetration of the hob lies in two aspects: firstly, the thrust is increased; however, because the bearing capacity of the hob is limited by the bearing, the hob with the corresponding diameter cannot improve the specification of the bearing, so that the increase of the thrust is limited; secondly, the width of the edge of the cutter ring is reduced; however, the too small blade width affects the bearing capacity of the cutter ring, and causes abnormal damage such as tipping of the cutter ring.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a TBM hobbing cutter ring that is used for complete hard rock of broken rock penetration can improve by a wide margin.
The utility model aims at realizing through such technical scheme, a TBM hobbing cutter ring for complete hard rock, including the cutter ring, the cutter ring is including the ring form cutter ring supporting body excircle is provided with standard sword wide part excircle is provided with narrow cutting part.
Wherein, in order to improve the bearing capacity, the initial edge width D of the wide part of the standard edge is larger than the initial edge width D of the narrow edge part.
Further, in order to avoid stress concentration, the front end of the cutter ring carrier is connected with the rear end of the standard blade wide portion and the front end of the standard blade wide portion is connected with the rear end of the narrow blade portion through concave arc lines.
In order to prevent the knife from collapsing, so that the narrow edge part has good bearing capacity and improves the penetration degree, the narrow edge part comprises a front end edge part and a rear end root, and the front end edge part is provided with an arc chamfer.
Further, the allowable wear height of the narrow edge portion is L1, and the allowable wear height of the standard edge wide portion is L2; the sum of the allowable wear height L1 of the narrow edge portion and the allowable wear height L2 of the standard edge wide portion is the cutter ring overall allowable wear height L, and the allowable wear height L1 of the narrow edge portion is slightly smaller than the allowable wear height L2 of the standard edge wide portion.
The narrow blade part is mainly used for tunneling complete hard rock, and is replaced when the allowable abrasion height L1 is reached, so that the TBM is ensured to break rock in the complete hard rock by the narrow blade part of the cutter ring, the penetration degree is improved, and the tunneling speed is improved; the rest standard edge wide part is continuously used for incomplete hard rock construction until the wear height L2 is allowed, and the cutter ring is scrapped; not only ensures the rock breaking efficiency of the complete hard rock section, but also can give full play to the service life of the cutter ring and save the comprehensive cost.
Since the technical scheme is used, the utility model has the advantages of simple structure, use reliably, low cost, adopt it not only to improve broken rock degree of penetration by a wide margin, and same hobbing cutter ring is used for complete hard rock section tunnelling earlier moreover, and when wearing and tearing were great to the sword width, it got off to change and is used for tunnelling under the geological conditions usually again, when improving complete hard rock section TBM tunnelling speed, has reduced cutter consumption cost.
Drawings
The drawings of the utility model are as follows:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of fig. 1.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments will still fall within the scope of the present invention as claimed in the appended claims.
Example 1: as shown in fig. 1 and 2, a TBM hob ring for complete hard rock, which comprises a cutter ring, wherein the cutter ring comprises a circular cutter ring carrier 1, a standard blade wide part 2 is arranged on the excircle of the cutter ring carrier 1, and a narrow blade part 3 is arranged on the excircle of the standard blade wide part 2.
Wherein, in order to improve the bearing capacity and increase the penetration, the initial edge width D of the standard blade wide portion 2 is larger than the initial edge width D of the narrow blade portion 3.
In order to further improve the penetration and prevent the occurrence of the chipping phenomenon, the narrow edge portion 3 includes a leading edge portion having a circular arc chamfer and a trailing root portion.
In the utility model, the cutter ring bearing body 1 with standard width and the standard blade wide part 2 can ensure the bearing capacity of the cutter ring; the narrow edge part 3 at the tip has small thickness, so the edge is not easy to break and the bearing capacity is good; the design of the small cutting angle of the cutting edge part effectively controls the dynamic cutting edge width of the cutter ring in the using process and improves the process penetration.
In order to avoid stress concentration, the front end of the cutter ring carrier 1 is connected with the rear end of the standard blade wide part 2, and the front end of the standard blade wide part 2 is connected with the rear end of the narrow blade part 3 through concave arc lines.
Further, in the present invention, the allowable wear height of the narrow blade portion 3 is L1, and the allowable wear height of the standard blade wide portion 2 is L2; the sum of the allowable wear height L1 of the narrow edge portion 3 and the allowable wear height L2 of the standard edge wide portion 2 is the cutter ring entire allowable wear height L, and the allowable wear height L1 of the narrow edge portion 3 is slightly smaller than the allowable wear height L2 of the standard edge wide portion 2. When the narrow blade part 3 is tunneled in the complete hard rock and the abrasion height reaches or is close to the allowable abrasion height, the cutter ring with the worn narrow blade part 3 is replaced and used for normal geological condition tunneling again until the overall abrasion height of the cutter ring reaches or is close to the allowable value.
Further, the narrow blade part 3 is mainly used for tunneling complete hard rock, and when the allowable abrasion height L1 is reached, the narrow blade part 3 is replaced to ensure that the TBM breaks rock in the complete hard rock by the cutter ring narrow blade part 3, so that the penetration degree is improved, and the tunneling speed is improved; the rest standard edge wide part 2 is continuously used for incomplete hard rock construction until the wear height L2 is allowed, and the cutter ring is scrapped; not only ensures the rock breaking efficiency of the complete hard rock section, but also can give full play to the service life of the cutter ring and save the comprehensive cost.
Claims (5)
1. The utility model provides a TBM hobbing cutter ring for complete hard rock, includes cutter ring, characterized by: the cutter ring comprises a circular cutter ring bearing body (1), wherein a standard blade wide part (2) is arranged on the excircle of the cutter ring bearing body (1), and a narrow edge part (3) is arranged on the excircle of the standard blade wide part (2).
2. The TBM hob ring for complete hard rock according to claim 1, characterized in that: the initial edge width D of the standard edge wide part (2) is larger than the initial edge width D of the narrow edge part (3).
3. The TBM hob ring for complete hard rock according to claim 2, characterized in that: the front end of the cutter ring bearing body (1) is connected with the rear end of the standard blade wide part (2) and the front end of the standard blade wide part (2) is connected with the rear end of the narrow blade part (3) through concave arc lines.
4. The TBM hob ring for complete hard rock according to claim 3, characterized in that: the narrow cutting part (3) comprises a front end cutting part and a rear end root, and the front end cutting part is provided with an arc chamfer.
5. The TBM hob ring for complete hard rock according to claim 4, characterized in that: the allowable wear height of the narrow blade part (3) is L1, and the allowable wear height of the standard blade wide part (2) is L2; the sum of the allowable wear height L1 of the narrow blade part (3) and the allowable wear height L2 of the standard blade wide part (2) is the cutter ring overall allowable wear height L, and the allowable wear height L1 of the narrow blade part (3) is slightly smaller than the allowable wear height L2 of the standard blade wide part (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020351423.9U CN211737140U (en) | 2020-03-19 | 2020-03-19 | TBM hob ring for complete hard rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020351423.9U CN211737140U (en) | 2020-03-19 | 2020-03-19 | TBM hob ring for complete hard rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211737140U true CN211737140U (en) | 2020-10-23 |
Family
ID=72853417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020351423.9U Active CN211737140U (en) | 2020-03-19 | 2020-03-19 | TBM hob ring for complete hard rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211737140U (en) |
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2020
- 2020-03-19 CN CN202020351423.9U patent/CN211737140U/en active Active
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