CN203822319U - Novel rock breaking hob - Google Patents
Novel rock breaking hob Download PDFInfo
- Publication number
- CN203822319U CN203822319U CN201420249255.7U CN201420249255U CN203822319U CN 203822319 U CN203822319 U CN 203822319U CN 201420249255 U CN201420249255 U CN 201420249255U CN 203822319 U CN203822319 U CN 203822319U
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- Prior art keywords
- cutter
- ring
- hob
- rock
- hobboing
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- 239000011435 rock Substances 0.000 title claims abstract description 87
- 230000007704 transition Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000005641 tunneling Effects 0.000 abstract description 2
- 231100000241 scar Toxicity 0.000 description 16
- 230000007246 mechanism Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 102000016938 Catalase Human genes 0.000 description 3
- 108010053835 Catalase Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- -1 and on face Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relate to hobs used in tunneling, and discloses a novel rock breaking hob for solving the problems that an existing disk-shaped hob is abraded seriously and a cutter is short in service life. According to the novel rock breaking hob, a cutter ring with a large diameter is adopted, the cutter ring is installed on one side of a disk-shaped hob body, and when the novel rock breaking hob is used, an included angle is formed between the cutter ring of the novel rock breaking hob and the normal of the rock breaking face and is kept, pressure is exerted on the disk-shaped hob body, the cutter ring breaks the rock under the pressure, the hob cutter ring mainly overcomes the rock shearing strength and bears small force, the abrasion and action force to the cutter ring are small, and the service life of the hob is long. Due to the fact that the cutter ring is installed on one side of the whole hob, and only the cutter ring makes contact with the breaking rock face during the rock breaking process, the situation that the service life is shortened because other components of the hob and the breaking rock face collide is avoided.
Description
Technical field
The utility model relates to the hobboing cutter using in tunnel piercing, and specifically a kind of application sheet is cut brokenly the novel Hob for cutting rock that rock dust carries out tunnel piercing.
Background technology
The use that tunnel piercing is equipped in underground engineering constructions such as building subway, track traffic, coal mine roadway is more and more extensive.The disk cutter of installing on the cutterhead of tunnel piercing equipment is the important cutter of fractured rock in tunneling process, and at present, the structure of disk cutter mainly comprises hobboing cutter cutter ring, cutter hub, fastening cover, end cap, cutter shaft, bearing and sealing device.During the broken rock of disk cutter, bear huge load and impact, bear the violent friction of rock simultaneously, and produce a large amount of dregs and rubble.The piece surface that disk cutter respectively exposes is all worn, especially hobboing cutter cutter ring and cutter hub, and then cause each several part switching performance destroyed, the performance of lubrication oil and rubber seal reduces, and causes cutter to lose gradually rock breaking capacity, causes scrapping in advance of cutter.While especially running into the full section hard rock of 50～250MPa geology, the destruction of hobboing cutter is more aobvious outstanding, and the construction speed that this directly has influence on engineering, expends a large amount of human and material resources and financial resources.
The rock breaking mechanism of existing hobboing cutter is: the disk cutter being arranged on cutterhead is pressed on scar under the effect of shield structure jack, and the thrust of disk cutter is perpendicular to broken scar; Along with the rotation of cutterhead, disk cutter is on the one hand around the revolution of cutterhead central axis, on the other hand around self axis rotation.Disk cutter, under the thrust and torsional interaction of cutterhead, cuts out a series of concentric circles on face.When thrust surpasses the intensity of rock, the rock under disk cutter point of a knife is directly broken, point of a knife injection rock, and on face, rock is cracked and form multiple tracks concentric grooves by disk cutter extruding.Along with the increase of gash depth, rock mass face crack deepen to expand, and when hobboing cutter pressure surpasses the shearing of rock and hot strength, the rock avalanche in blocks between neighboring concentric circle groove, completes the rock break-off process of disk cutter.The rock break-off process of this rock breaking method is roughly divided into generation expansion and the chip rock failure four-stage of elastic deformation, placticity failure, crackle, and rock break load has certain periodicity and fluctuation, larger to the destructiveness of hobboing cutter.1, hobboing cutter uniaxial compressive strength is large, Hob ring blade quick abrasion, and the life-span is short.2, broken rock speed is slower, and drivage efficiency is low.3, the power that digging device consumes is larger.
And sheet to cut brokenly rock be to keep cutter ring to have certain angle of slope, and apply with pressure on disk cutter, make Rock laminate cut and under.Sheet is cut brokenly under rock mode, and the stressed and wearing and tearing of disk cutter are all less, so the long service life of hobboing cutter.Existing disk cutter is applied to sheet while cutting brokenly rock, and the non-broken petrosa part such as cutter shaft or hobboing cutter fastening cover can bump with broken scar and can not complete sheet and cut brokenly rock.
Utility model content
The purpose of this utility model is to provide a kind of novel Hob for cutting rock, and the mode of cutting brokenly rock with sheet is applied in the broken rock operation in tunnel, for solving existing disk cutter serious wear, the short problem of cutter life.
The technical scheme in the invention for solving the technical problem is: a kind of novel Hob for cutting rock, comprise cutter ring, hobboing cutter cutter hub, cutter bearing, hobboing cutter back-up ring and hobboing cutter fastening cover, one end at cutter shaft is installed with cutter bearing, in the outside of described cutter bearing, be nested with and be installed with hobboing cutter cutter hub, at described hobboing cutter cutter hub outer wall, cutter ring is installed, and the hobboing cutter back-up ring of restriction cutter ring axial displacement is installed on described hobboing cutter cutter hub, the other end at described cutter shaft is provided with hobboing cutter fastening cover, it is characterized in that, described cutter ring is fixedly mounted on a side of hobboing cutter cutter hub.
Further, described cutter ring is the metallic disc-shaped part that two ends differ in size, and at the large end of described cutter ring, is provided with blade.
Further, be provided with the projection of an annular on the outer wall of described hobboing cutter cutter hub one end, at the center of described cutter ring, be provided with a stepped hole, the macropore of described stepped hole contacts cooperation with described projection, and the aperture of described stepped hole contacts cooperation with described hobboing cutter cutter hub; On the hobboing cutter cutter hub of described projection one side, be provided with a cannelure, a hobboing cutter back-up ring is installed in described cannelure, an end face of described hobboing cutter back-up ring contacts cooperation with the small end face of described cutter ring.
Further, the diameter of the large end of described cutter ring is 480mm to 635mm.。
Further, the large end of described cutter ring and cutter ring small end pass through arc transition.
Further, the diameter of the large end of described cutter ring is 560mm.
The beneficial effects of the utility model are: the novel Hob for cutting rock that the utility model provides, adopt large diameter cutter ring, cutter ring is arranged on a side of disk cutter, during work, the cutter ring of novel Hob for cutting rock and the normal of broken scar is formed an angle, then keep this angle and exert pressure on disk cutter, under this pressure, cutter ring is catalase, and cutter ring mainly bears shearing, stressed less, all less to the wearing and tearing of cutter ring and active force, the long service life of hobboing cutter.Because cutter ring is arranged on a side of whole hobboing cutter, in rock break-off process, only have cutter ring to contact with broken scar, the lifetime of having avoided other parts of hobboing cutter and the collision of broken scar to cause.
Accompanying drawing explanation
Fig. 1 is extruding/crack initiation stage of malleation vertical cut rock breaking mechanism;
Fig. 2 is the catalase stage of malleation vertical cut rock breaking mechanism;
Fig. 3 is that sheet is cut rock breaking mechanism schematic diagram;
Fig. 4 is cross-sectional schematic of the present utility model;
Fig. 5 is the cross-sectional schematic of hobboing cutter cutter hub;
Fig. 6 is that the utility model is used view;
Fig. 7 is cutter ring cross-sectional schematic;
In figure: a disk cutter, b breaks scar, the broken piece of c, d compact core, unsettled of e, f fracture area, the g1 first floor plane of disruption, the g2 second layer plane of disruption, n normal, F pressure, β angle of slope, 1 cutter ring, 11 blades, 12 stepped holes, 13 circular arcs, 2 hobboing cutter back-up rings, 3 hobboing cutter cutter hubs, 31 projections, 32 cannelures, 4 cutter bearings, 5 hobboing cutter fastening covers.
The specific embodiment
As shown in Figure 1 and Figure 2, schematic diagram for existing malleation vertical cut rock breaking mechanism, the disk cutter a being arranged on cutterhead is pressed on brokenly on scar b under the effect of shield structure jack, rock generation strength failure under powerful pressure F below cutter ring is pulverized and is formed moulding compact core, compact core as liquid by the peripherad rock mass transmission of pressure; When pressure surpasses after rock mass bearing strength, the rock mass under cutter ring bursts apart according to certain angle (being called crushing angle).Between two disk cutters, there is certain interval, on the scar between two disk cutters, form broken piece c.Different catalase angles is different, but the crushing angle of any one rock does not change with the change of cutter ring cutting blade shape.This rock breaking mechanism is commonly called as " malleation vertical cut breaks rock dust ", is also " attrition crushing method ".The stress form of disk cutter is mainly resistance to compression, is secondly shearing resistance, mainly overcomes the uniaxial compressive strength of rock.
Under above-mentioned rock breaking mechanism, the wearing and tearing of hobboing cutter are comparatively serious, and hobboing cutter is perpendicular to broken scar, and broken rock speed is slower, and drivage efficiency is low.As shown in Figure 3, for sheet is cut the schematic diagram of rock breaking mechanism, between the normal n of disk cutter a and broken scar b, become the incision of β angle of slope, the span at β angle of slope be 10 degree to 20 degree, optimum value is 15 degree.It is unsettled e that rock stratum is exposed to an airborne side.Disk cutter blade sheet under the effect of pressure F cuts into broken scar, the degree of depth (being called pile penetration) that injection is certain, at this moment disk cutter blade front end forms a compact core d gradually, along with constantly growing up of compact core, add the effect of pressure F, compact core is constantly torn its rock around and has just been formed fracture area f again, along with the continuous expansion of fracture area just chips away unsettled dough sheet, and forms first floor plane of disruption g1.Now, the first floor plane of disruption becomes one new unsettled, disk cutter continuously carries out sheet according to above-mentioned broken rock mode to rock and cuts brokenly rock on cantilever type swing tunnel piercing equipment, forms second layer plane of disruption g2, the 3rd, the 4th ... the N layer plane of disruption.
Sheet is cut under rock breaking mechanism, and the stress form of disk cutter is mainly shearing resistance, is secondly resistance to compression, the shear strength that mainly overcomes rock, has reduced cutting force, has also reduced the reaction force to disk cutter, alleviate the destructive power to disk cutter assembly, extended the application life of hobboing cutter.Sheet is cut under rock breaking mechanism, stressed 6%～9% of the attrition crushing method that is about of disk cutter.Its advantage is: 1, hobboing cutter uniaxial compressive strength reduces greatly, and the wearing and tearing of Hob ring blade are slow, hobboing cutter long service life.2, broken rock speed is fast, and drivage efficiency is high, is specially adapted to the excavation driving of full section hard rock geology.3, the power that digging device consumes is less.
Existing disk cutter can not application sheet be cut brokenly rock dust rock is broken to rock operation, reason is that cutter ring is arranged on the center line of whole disk cutter, when cutter ring becomes angle of inclination beta with the normal of broken scar, there is collision in other parts on disk cutter and broken scar, therefore can not be used for carrying out sheet cuts brokenly rock.As shown in Figure 4, be the structural representation of novel Hob for cutting rock of the present utility model, mainly comprise cutter ring 1, hobboing cutter back-up ring 2, hobboing cutter cutter hub 3, cutter bearing 4 and hobboing cutter fastening cover 5.Only be with the difference of existing disk cutter, cutter ring diameter of the present utility model is larger, and cutter ring diameter is between 480mm to 635mm, and preferred size is 560mm.Cutter ring 1 is arranged on a side of hobboing cutter cutter hub 3, and the inwall of hobboing cutter cutter hub is fixedly connected with cutter bearing 4, and hobboing cutter cutter hub can be rotated.As shown in Figure 5, be provided with an annular projection 31 on the outer wall of hobboing cutter cutter hub, this projection can be integrally manufactured with hobboing cutter cutter hub.As shown in Figure 7, cutter ring is the metallic disc-shaped part that two ends differ in size, and at the large end of cutter ring, is provided with blade 11, and the large end of cutter ring and cutter ring small end are by circular arc 13 transition.At the center of cutter ring, be provided with stepped hole 12, the macropore of stepped hole contacts cooperation with projection, and the aperture of stepped hole contacts cooperation with the outer wall of hobboing cutter cutter hub.Arranging on the one hand for cutter ring is installed of projection, can limit cutter ring on the other hand along axially movement left of disk cutter.For restriction cutter ring is along the axial movement to the right of disk cutter, on the outer wall of hobboing cutter cutter hub, be also provided with a cannelure 32, one side of cannelure overlaps with the small end face of cutter ring, hobboing cutter back-up ring 2 is installed in cannelure, hobboing cutter back-up ring is the metalwork of annular, one side of hobboing cutter back-up ring contacts cooperation with the small end face of cutter ring, by being stuck in hobboing cutter back-up ring in cannelure, cutter ring is carried out axially to the right spacing.
During use, this Hob for cutting rock is arranged on tunnel piercing equipment, and the cutter ring angle of inclination beta of adjusting Hob for cutting rock is between 10 degree to 20 degree, as shown in Figure 6, then by tunnel piercing, equip and exert pressure F on Hob for cutting rock, Hob for cutting rock is delivered to brokenly scar by pressure F, and Hob for cutting rock blade sheet under the effect of pressure F cuts into broken scar, and the certain degree of depth of injection.Now, front end at blade forms a compact core gradually, and compact core constantly expands and rock around is constantly torn and formed fracture area, and fracture area constantly expands and just unsettled dough sheet chipped away, form the first floor plane of disruption, the first floor plane of disruption becomes new unsettled.Then to the side shifting hobboing cutter away from the first floor plane of disruption, and keep the angle of inclination beta of hobboing cutter cutter ring, repeat step above, the sheet completing is again cut operation.
Claims (6)
1. a novel Hob for cutting rock, comprise cutter ring, hobboing cutter cutter hub, cutter bearing, hobboing cutter back-up ring and hobboing cutter fastening cover, one end at cutter shaft is installed with cutter bearing, in the outside of described cutter bearing, be nested with and be installed with hobboing cutter cutter hub, at described hobboing cutter cutter hub outer wall, cutter ring is installed, and the hobboing cutter back-up ring of restriction cutter ring axial displacement is installed on described hobboing cutter cutter hub, the other end at described cutter shaft is provided with hobboing cutter fastening cover, it is characterized in that, described cutter ring is fixedly mounted on a side of hobboing cutter cutter hub.
2. a kind of novel Hob for cutting rock according to claim 1, is characterized in that, described cutter ring is the metallic disc-shaped part that two ends differ in size, and at the large end of described cutter ring, is provided with blade.
3. a kind of novel Hob for cutting rock according to claim 2, it is characterized in that, on the outer wall of described hobboing cutter cutter hub one end, be provided with the projection of an annular, at the center of described cutter ring, be provided with a stepped hole, the macropore of described stepped hole contacts cooperation with described projection, and the aperture of described stepped hole contacts cooperation with described hobboing cutter cutter hub; On the hobboing cutter cutter hub of described projection one side, be provided with a cannelure, a hobboing cutter back-up ring is installed in described cannelure, an end face of described hobboing cutter back-up ring contacts cooperation with the small end face of described cutter ring.
4. a kind of novel Hob for cutting rock according to claim 2, is characterized in that, the diameter of the large end of described cutter ring is 480mm to 635mm.
5. a kind of novel Hob for cutting rock according to claim 2, is characterized in that, the large end of described cutter ring and cutter ring small end pass through arc transition.
6. a kind of novel Hob for cutting rock according to claim 4, is characterized in that, the diameter of the large end of described cutter ring is 560mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249255.7U CN203822319U (en) | 2014-05-15 | 2014-05-15 | Novel rock breaking hob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249255.7U CN203822319U (en) | 2014-05-15 | 2014-05-15 | Novel rock breaking hob |
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| Publication Number | Publication Date |
|---|---|
| CN203822319U true CN203822319U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420249255.7U Expired - Lifetime CN203822319U (en) | 2014-05-15 | 2014-05-15 | Novel rock breaking hob |
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| Country | Link |
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| CN (1) | CN203822319U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953357A (en) * | 2014-05-15 | 2014-07-30 | 邵祥顺 | Novel rock breaking method and rock breaking hob |
-
2014
- 2014-05-15 CN CN201420249255.7U patent/CN203822319U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953357A (en) * | 2014-05-15 | 2014-07-30 | 邵祥顺 | Novel rock breaking method and rock breaking hob |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180724 Address after: 252000 7 Songhua River Road, Liaocheng economic and Technological Development Zone, Shandong Patentee after: SHANDONG RUIZUAN ENGINEERING EQUIPMENT CO.,LTD. Address before: 252000 room 504, unit 2, 6 building, 18 East Lane, Dongchangfu District, Liaocheng, Shandong. Patentee before: Shao Xiangshun |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |
|
| CX01 | Expiry of patent term |