CN111550254A - Novel hobbing cutter structure suitable for high-temperature stratum - Google Patents
Novel hobbing cutter structure suitable for high-temperature stratum Download PDFInfo
- Publication number
- CN111550254A CN111550254A CN202010444544.2A CN202010444544A CN111550254A CN 111550254 A CN111550254 A CN 111550254A CN 202010444544 A CN202010444544 A CN 202010444544A CN 111550254 A CN111550254 A CN 111550254A
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- Prior art keywords
- hob
- hole
- end cover
- heat
- bearing
- Prior art date
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- Granted
Links
- 239000000463 material Substances 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 abstract description 18
- 239000003921 oil Substances 0.000 abstract description 15
- 125000006850 spacer group Chemical group 0.000 abstract description 12
- 238000007789 sealing Methods 0.000 abstract description 5
- 239000011435 rock Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of shield cutters applied to underground engineering, in particular to a novel hob structure suitable for high-temperature strata, which comprises a cutter shaft, bearings, a spacer ring and end covers arranged on two sides of each bearing, wherein the bearings and the spacer ring are assembled on the cutter shaft, the spacer ring is arranged between adjacent bearings, an axial hole is formed in the cutter shaft, a first radial hole is formed in the end cover at the joint of the end cover and the cutter shaft and communicated with an oil cavity at the outer end of each bearing, a second radial hole is formed in the spacer ring and communicated with the oil cavity at the inner end of each bearing, a third radial hole for communicating the first radial hole with the axial hole and a fourth radial hole for communicating the second radial hole with the axial hole are formed in the cutter shaft, and an opening at the end part of the axial hole is connected with. The invention can increase the volume of the inner cavity of the hob, increase the storage amount of lubricating oil, enhance the fluidity of oil in the hob, realize smooth flow of an oil path, quickly transfer high temperature to low temperature, reduce the internal temperature of the hob, prolong the service life of the lubricating oil, the bearing and the sealing element and enhance the performance of the hob.
Description
Technical Field
The invention relates to the technical field of shield cutters applied to underground engineering, in particular to a novel hob structure suitable for high-temperature strata.
Background
The hob is an excavating tool for crushing hard rocks, is arranged on an excavating cutterhead of large-scale trenchless construction equipment such as a shield, a TBM (tunnel boring machine), a jacking pipe and the like, and is used for rolling rock on a tunnel face and stripping the rock from the tunnel face.
The hobbing cutter can generate larger heat due to friction with rocks in the rock breaking process, the speed of the hobbing cutter in the edge area of the cutter head is increased along with the increase of the excavation diameter of a shield tunneling machine and a TBM (tunnel boring machine), and more heat is generated; lubricating oil, sealing and bearing overheating of the hob can be caused to fail in advance due to the fact that the high temperature is too long, the whole hob is scrapped, construction progress is influenced, and construction cost is increased.
Disclosure of Invention
The invention aims to solve the problems and the defects, and provides a novel hob structure suitable for high-temperature stratum.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a novel hobbing cutter structure that adapts to high temperature stratum, includes arbor, bearing, space ring and sets up the end cover in the bearing both sides, bearing and space ring assembly are on the arbor, the space ring is established between two adjacent bearings, be equipped with the axial hole in the arbor, be equipped with first radial hole on the end cover of end cover and arbor junction, the oil pocket intercommunication of first radial hole and bearing outer end, be equipped with the radial hole of second on the space ring, the radial hole of second and the inner oil pocket intercommunication of bearing, be equipped with the third radial hole of first radial hole of intercommunication and axial hole and the fourth radial hole of intercommunication second radial hole and axial hole on the arbor, the end opening part of axial hole is connected with the end cap.
Further, in the above-mentioned novel hobbing cutter structure who adapts to high temperature stratum, the axial hole runs through the both ends of arbor, and its both ends opening part all is connected with the end cap, the axle center position of axial hole is equipped with the heat pipe, the outer wall of heat pipe with be equipped with the clearance between the inner wall of axial hole, the both ends of heat pipe are connected with the end cap that corresponds respectively.
Further, in the above-mentioned novel hobbing cutter structure that adapts to high temperature stratum, the heat conduction pipe is hollow copper pipe, heat conduction copper pipe inside is equipped with high heat conduction material.
Further, in the above novel hob structure adapted to a high-temperature stratum, the high thermal conductive material is heat conductive graphite or a solid copper pipe.
Further, in the above-mentioned novel hobbing cutter structure that adapts to high temperature stratum, the end cap sets up to hollow end cap, the hole of hollow end cap with the hole of heat pipe communicates with each other, high heat conduction material sets up hollow end cap with in the hole of heat pipe, the hollow end cap outer end is connected with the stopper of shutoff high heat conduction material.
Furthermore, in the above-mentioned novel hobbing cutter structure that adapts to high temperature stratum, the heat pipe is the combination heat pipe, the combination heat pipe includes two heat pipes, and the evaporating ends of two heat pipes are even as an organic whole, and are located the middle part of axial hole, and the condensing end of two heat pipes is located the tip of axial hole just seals with the end cap.
Furthermore, in the above-mentioned novel hobbing cutter structure that adapts to high temperature stratum, the annular groove is still processed on the arbor of end cover and arbor junction.
Further, in the above-mentioned novel hobbing cutter structure that adapts to high temperature stratum, the outside of bearing is connected with the sword hub, the outside of sword hub is connected with cutter ring and retaining ring.
Further, in the above novel hob structure adapted to a high-temperature stratum, two bearings are symmetrically assembled on the hob shaft.
Further, in the above-mentioned novel hobbing cutter structure that adapts to high temperature stratum, the end cover includes upper end cover and lower end cover, the lower end cover passes through the shaft shoulder and fixes a position on the arbor, the upper end cover passes through lock nut and locks on the arbor.
The novel hob structure suitable for high-temperature strata has the beneficial effects that:
according to the invention, the holes are formed in the end cover, the cutter shaft and the spacer ring, so that the volume of the inner cavity of the hob can be increased, the storage amount of lubricating oil is increased, the temperature rise speed of the lubricating oil is reduced, the fluidity of oil in the hob can be enhanced, smooth oil circuit circulation is realized, the oil temperature can be quickly driven to the axis part of the cutter shaft and then is transmitted out through the end part of the cutter shaft.
According to the invention, the heat conduction pipe is arranged at the axial center of the axial hole, the heat conduction pipe is a copper pipe or a combined heat pipe, the heat conduction coefficient is large, lubricating oil in the hob brings heat to the axial center of the hob and then contacts with the heat conduction pipe, the heat conduction pipe can quickly conduct the heat to the end part of the hob shaft and then conduct the heat to the outside of the hob, the high temperature is quickly transferred to the low temperature, the internal temperature of the hob is reduced, the service lives of the lubricating oil, the bearing and the sealing element are prolonged, and.
According to the invention, the high heat conduction material is arranged in the heat conduction pipe, the high heat conduction material is arranged in the hob, so that the heat dissipation is convenient, the heat conductivity coefficient of the heat conduction pipe can be further increased, lubricating oil in the hob brings heat to the heat conduction pipe at the center of the hob shaft, the heat conduction pipe transmits the heat to the high heat conduction material, and the high heat conduction material can rapidly absorb the temperature in the hob and conduct the temperature to the outside of the hob.
The installation overall dimension of the hob of the invention is not changed, and the hob can be applied to all existing cutterheads.
Drawings
Fig. 1 is a schematic overall structure diagram of a novel hob structure adapted to a high-temperature stratum according to an embodiment of the present invention.
In the figure: the device comprises a plug 1, a plug 2, an O-shaped ring 3, a cutter shaft 4, an O-shaped ring 5, an end cover 6, a floating seal seat 7, an O-shaped ring 8, a cutter ring 9, a retainer ring 10, a cutter hub 11, an O-shaped ring 12, a locking nut 13, an O-shaped ring 14, a high-heat-conductivity material 15, a heat-conducting pipe 16, a bearing 17 and a spacer 18.
Detailed Description
The novel hob structure adapted to a high temperature formation according to the present invention is described in more detail by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the present embodiment discloses a novel hob structure adapted to high temperature strata, which includes a hob shaft 4 and a bearing 17, the cutter shaft comprises a spacer ring 18 and end covers 6 arranged on two sides of a bearing 17, the bearing 17 and the spacer ring 18 are assembled on a cutter shaft 4, the spacer ring 18 is arranged between every two adjacent bearings 17, an axial hole is formed in the axis position of the cutter shaft 4, a plurality of first radial holes are uniformly distributed in the end cover 6 at the joint of the end cover 6 and the cutter shaft 4 and communicated with an oil cavity at the outer end of the bearing 17, a plurality of second radial holes are uniformly distributed in the spacer ring 18 and communicated with the oil cavity at the inner end of the bearing 17, a third radial hole communicated with the first radial hole and the axial hole and a fourth radial hole communicated with the second radial hole and the axial hole are formed in the cutter shaft 4, a plug 2 is connected to an end opening of the axial hole, and an O-shaped ring 3 and an O-shaped ring 14 are arranged between the plug. The end cover 6, the cutter shaft 4 and the spacer ring 18 are provided with holes, the volume of an inner cavity of the hob can be increased, the storage amount of lubricating oil is increased, the heating speed of the lubricating oil is reduced, the lubricating oil at the positions of the end cover 6, the cutter shaft 4 and the spacer ring 18 can be kept communicated, the fluidity of the oil inside the hob is enhanced, smooth oil circuit circulation is realized, along with the revolution and the rotation of the hob, heat generated in the rotary rock breaking process of the hob can be quickly conducted to surrounding oil, then the lubricating oil circularly and continuously flows into the axial hole in the core part of the cutter shaft 4, the oil temperature can be quickly driven to the core part of the.
In this embodiment, preferably, the axial hole penetrates through two ends of the cutter shaft 4, openings at two ends of the axial hole are both connected with the plugs 2, a heat pipe 16 is disposed at an axial center position of the axial hole, a gap is disposed between an outer wall of the heat pipe 16 and an inner wall of the axial hole, and two ends of the heat pipe 16 are respectively connected with the corresponding plugs 2. The heat conduction performance of the heat conduction pipe 16 needs to be superior to that of the cutter shaft 4, lubricating oil in the hob brings heat to the core of the cutter shaft 4 and then contacts with the heat conduction pipe 16, the heat conduction pipe 16 can conduct the heat to the end of the cutter shaft 4 quickly and then conducts the heat to the outside of the hob, high temperature is quickly transmitted to low temperature, the internal temperature of the hob is reduced, the service lives of lubricating oil, a bearing 17 and a sealing piece are prolonged, and the performance of the hob is enhanced.
In this embodiment, preferably, heat pipe 16 is hollow copper pipe, and hollow copper pipe's coefficient of heat conductivity is high, can conduct heat to 4 tip of arbor and conduct the hobbing cutter outside again fast, and heat pipe is inside to be equipped with high heat conduction material 15, can further increase heat pipe 16's coefficient of heat conductivity, and the inside lubricating oil of hobbing cutter takes the heat to the heat pipe 16 department of 4 heart portions of arbor, and heat pipe 16 is with heat transfer to high heat conduction material 15, and high heat conduction material 15 can be siphoned away the inside temperature of hobbing cutter rapidly to conduct the hobbing cutter outside.
In this embodiment, specifically, the high thermal conductive material 15 is heat conductive graphite or a solid copper tube, and if the high thermal conductive material is a solid copper tube, the high thermal conductive material needs to be in close contact with an external hollow copper tube.
In this embodiment, preferably, the plug 2 is configured as a hollow plug 2, an inner hole of the hollow plug 2 is communicated with an inner hole of the heat conducting pipe 16, the high thermal conductivity material 15 is disposed in the inner holes of the hollow plug 2 and the heat conducting pipe 16, and the outer end of the hollow plug 2 is connected with a plug 1 for plugging the high thermal conductivity material 15. The high heat conduction material 15 can be closer to the end part of the cutter shaft 4, and the heat transfer efficiency can be further improved.
In this embodiment, preferably, the heat conducting pipe 16 is a combined heat pipe, the combined heat pipe includes two heat pipes, evaporation ends of the two heat pipes are connected into a whole and located in the middle of the axial hole, and condensation ends of the two heat pipes are located at ends of the axial hole and are closed by the plug 2. The heat transfer coefficient of heat pipe is high, can conduct heat to 4 tip of arbor and conduct the hobbing cutter outside again fast, realizes that high temperature is fast to the low temperature transmission, reduces the inside temperature of hobbing cutter, increases lubricating oil, bearing 17 and sealing member life, reinforcing hobbing cutter performance.
In this embodiment, preferably, a ring groove is further processed on the knife shaft 4 at the connection position of the end cover 6 and the knife shaft 4. The volume of the inner cavity of the hob can be further increased, and the first radial hole and the third radial hole are directly communicated with the annular groove, so that the circulation of lubricating oil in the outer end of the bearing 17 and the lubricating oil in the axial hole is better.
In this embodiment, specifically, the outer side of the bearing 17 is connected with the cutter hub 11, the inner side of the cutter hub 11 is connected with the floating seal seat 7, the O-ring 8 is arranged between the floating seal seat 7 and the cutter hub 11, and the outer side of the cutter hub 11 is connected with the cutter ring 9 and the retaining ring 10. Two bearings 17 are symmetrically assembled on the cutter shaft 4. The end cover 6 comprises an upper end cover 6 and a lower end cover 6, the lower end cover 6 is positioned on the cutter shaft 4 through a shaft shoulder, an O-shaped ring 5 is arranged between the lower end cover 6 and the cutter shaft 4, the upper end cover 6 is locked on the cutter shaft 4 through a locking nut 13, and an O-shaped ring 12 is arranged between the locking nut 13 and the upper end cover 6.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
Exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above, and various combinations of the technical features and structures proposed by the present invention may be made without departing from the concept of the present invention.
Claims (10)
1. The utility model provides a novel hobbing cutter structure that adapts to high temperature stratum, includes arbor, bearing, space ring and sets up the end cover in the bearing both sides, bearing and space ring assembly are on the arbor, the space ring is established between two adjacent bearings, its characterized in that, be equipped with the axial hole in the arbor, be equipped with first radial hole on the end cover of end cover and arbor junction, the oil pocket intercommunication of first radial hole and bearing outer end, be equipped with the radial hole of second on the space ring, the radial hole of second communicates with the inner oil pocket of bearing, be equipped with the third radial hole of the first radial hole of intercommunication and axial hole and the fourth radial hole of intercommunication second radial hole and axial hole on the arbor, the tip opening part of axial hole is connected with the end cap.
2. The novel hob structure suitable for high-temperature strata according to claim 1, wherein the axial hole penetrates through both ends of the hob shaft, openings at both ends of the axial hole are connected with plugs, a heat conduction pipe is arranged at the axial center of the axial hole, a gap is arranged between the outer wall of the heat conduction pipe and the inner wall of the axial hole, and both ends of the heat conduction pipe are respectively connected with the corresponding plugs.
3. The novel hob structure adapted to a high-temperature stratum according to claim 2, wherein the heat conduction pipe is a hollow copper pipe, and a high heat conduction material is arranged inside the heat conduction copper pipe.
4. The novel hob structure for adapting to high-temperature formations according to claim 3, wherein the high heat conduction material is heat conduction graphite or solid copper pipe.
5. The novel hob structure for adapting to high-temperature strata according to claim 3, wherein the plug is a hollow plug, the inner hole of the hollow plug is communicated with the inner hole of the heat conducting pipe, the high thermal conductivity material is arranged in the hollow plug and the inner hole of the heat conducting pipe, and the outer end of the hollow plug is connected with a plug for plugging the high thermal conductivity material.
6. The novel hob structure for adapting to a high-temperature stratum according to claim 2, wherein the heat conduction pipe is a combined heat pipe, the combined heat pipe comprises two heat pipes, evaporation ends of the two heat pipes are connected into a whole and located in the middle of the axial hole, and condensation ends of the two heat pipes are located at the end of the axial hole and are closed by plugs.
7. The novel hob structure suitable for high-temperature strata according to claim 1, wherein a ring groove is further processed on the cutter shaft at the joint of the end cover and the cutter shaft.
8. The novel hob structure suitable for high-temperature strata according to claim 1, wherein a hob hub is connected to the outer side of the bearing, and a hob ring and a retaining ring are connected to the outer side of the hob hub.
9. The novel hob structure adapted to a high-temperature stratum according to claim 1, wherein two bearings are symmetrically assembled on the arbor.
10. The novel hob structure adapted to a high-temperature stratum according to claim 1, wherein the end cover comprises an upper end cover and a lower end cover, the lower end cover is positioned on the arbor through a shoulder, and the upper end cover is locked on the arbor through a lock nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010444544.2A CN111550254B (en) | 2020-05-23 | 2020-05-23 | Novel hobbing cutter structure suitable for high-temperature stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010444544.2A CN111550254B (en) | 2020-05-23 | 2020-05-23 | Novel hobbing cutter structure suitable for high-temperature stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111550254A true CN111550254A (en) | 2020-08-18 |
| CN111550254B CN111550254B (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010444544.2A Active CN111550254B (en) | 2020-05-23 | 2020-05-23 | Novel hobbing cutter structure suitable for high-temperature stratum |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08291695A (en) * | 1995-02-23 | 1996-11-05 | Kawasaki Heavy Ind Ltd | Cutter ring of tunnel excavator and method for mounting the same |
| CN202381099U (en) * | 2011-12-28 | 2012-08-15 | 海瑞克(广州)隧道设备有限公司 | Reinforcing type hobbing cutter with air pressure balance function |
| CN207879341U (en) * | 2018-01-02 | 2018-09-18 | 成都锐钻钻头制造有限公司 | A kind of heat-resisting single-blade hob |
| CN208431013U (en) * | 2018-06-27 | 2019-01-25 | 中铁工程装备集团隧道设备制造有限公司 | Adapt to the shield hobboing cutter sealing structure and shield hobboing cutter of high hydraulic pressure environment |
| CN110017146A (en) * | 2019-04-03 | 2019-07-16 | 中铁工程装备集团隧道设备制造有限公司 | Outer circulation type is adaptively adjusted structure, cutterhead and hobboing cutter and method is adaptively adjusted |
| CN209892207U (en) * | 2019-04-03 | 2020-01-03 | 中铁工程装备集团隧道设备制造有限公司 | Heat balance structure, hobbing cutter and cutter head |
-
2020
- 2020-05-23 CN CN202010444544.2A patent/CN111550254B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08291695A (en) * | 1995-02-23 | 1996-11-05 | Kawasaki Heavy Ind Ltd | Cutter ring of tunnel excavator and method for mounting the same |
| CN202381099U (en) * | 2011-12-28 | 2012-08-15 | 海瑞克(广州)隧道设备有限公司 | Reinforcing type hobbing cutter with air pressure balance function |
| CN207879341U (en) * | 2018-01-02 | 2018-09-18 | 成都锐钻钻头制造有限公司 | A kind of heat-resisting single-blade hob |
| CN208431013U (en) * | 2018-06-27 | 2019-01-25 | 中铁工程装备集团隧道设备制造有限公司 | Adapt to the shield hobboing cutter sealing structure and shield hobboing cutter of high hydraulic pressure environment |
| CN110017146A (en) * | 2019-04-03 | 2019-07-16 | 中铁工程装备集团隧道设备制造有限公司 | Outer circulation type is adaptively adjusted structure, cutterhead and hobboing cutter and method is adaptively adjusted |
| CN209892207U (en) * | 2019-04-03 | 2020-01-03 | 中铁工程装备集团隧道设备制造有限公司 | Heat balance structure, hobbing cutter and cutter head |
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| Publication number | Publication date |
|---|---|
| CN111550254B (en) | 2021-10-01 |
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