CN110924966B - Novel shield spherical tooth hob for rock breaking test - Google Patents
Novel shield spherical tooth hob for rock breaking test Download PDFInfo
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- CN110924966B CN110924966B CN201911234779.2A CN201911234779A CN110924966B CN 110924966 B CN110924966 B CN 110924966B CN 201911234779 A CN201911234779 A CN 201911234779A CN 110924966 B CN110924966 B CN 110924966B
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- 239000011435 rock Substances 0.000 title claims abstract description 58
- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 25
- 125000006850 spacer group Chemical group 0.000 claims abstract description 7
- 238000005457 optimization Methods 0.000 abstract description 4
- 239000011295 pitch Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 230000005641 tunneling Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/58—Investigating machinability by cutting tools; Investigating the cutting ability of tools
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
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- Environmental & Geological Engineering (AREA)
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a novel shield spherical tooth hob for a rock breaking test. The novel shield spherical tooth hob for the rock breaking test is composed of a sensor, a connecting plate, a tool rest, a sleeve, a left tool ring, a hydraulic locking bolt, spherical teeth, a retaining ring, an interval spacer ring, a tool ring locking plate, a tool shaft locking screw, a wedge block, a tool shaft, a left bearing, a left end cover, a sliding key, a right end cover, a right bearing, a right tool ring, a spherical tooth base, a hydraulic oil cavity and an expansion film. The novel shield spherical tooth hob tooth diameter, the spherical tooth height, the spherical tooth interval and the multi-edge spherical tooth row for the rock breaking test can be continuously adjusted, single-edge and multi-edge spherical tooth hob rock breaking tests under different parameters can be effectively carried out, and basis can be provided for optimization and model selection of structural parameters of the spherical tooth hob under different stratums.
Description
Technical Field
The invention relates to the technical field of a shield machine spherical tooth hob cutting rock breaking test, in particular to a novel shield spherical tooth hob for a rock breaking test.
Background
With the rapid development of underground space in China, the shield tunneling machine is widely applied to tunnel excavation in China by virtue of the advantages of high construction efficiency, low construction cost, no pollution to the environment and the like. The shield machine mainly depends on a cutter disc to cut and strip rock soil, and further forward tunneling of the shield machine is achieved. Two types of cutters are generally distributed on a cutter head of the shield tunneling machine: a hob and a scraper. The hob is mainly suitable for rock strata, while the scraper is mainly suitable for soil strata. Generally, for rock-soil mixed complex strata, a hob and a scraper are required to be equipped at the same time. The matching of the cutters needs to be determined according to the specific geological conditions. Because our country has wide breadth and complicated and changeable stratum, in order to meet the cutting and rock breaking requirements of complicated and changeable stratum, a novel spherical tooth hob is gradually applied to the shield. The ball tooth hobbing cutter is on the basis of conventional hobbing cutter, inlays a round of ball tooth at conventional hobbing cutter ring surface, and the broken rock process of this kind of novel ball tooth hobbing cutter can be summarized as follows:
when the cutting depth of the spherical tooth hob is smaller, only spherical teeth participate in cutting rocks at the moment, the cutter ring does not directly interact with the rocks, and the cutter ring base materials can be well protected due to the fact that the spherical teeth have better abrasion resistance, so that the service life of the cutter ring is longer than that of a conventional hob; when the cutting depth of the spherical tooth hob is large, the spherical tooth hob is embedded into a rock body firstly in the rock breaking process, the rock is pre-broken, then the hob cutter ring cuts the rock, the rock breaking load of the cutter ring can be obviously reduced in the breaking process, the rock breaking efficiency of the cutter ring is improved, and further the integral cutting performance of the spherical tooth hob is superior to that of a conventional hob. Therefore, the spherical tooth hob has multiple advantages compared with a conventional hob, and the reasonable arrangement of the spherical tooth hob can obviously improve the shield tunneling efficiency and the tunneling reliability.
The key structural parameters of the novel spherical gear hob mainly relate to the diameter of the spherical gear, the height of the spherical gear, the distance between the spherical gears and the row pitch of the multi-edge spherical gears, and the key parameter of selecting the proper spherical gear is the key for determining the rock breaking performance of the spherical gear hob. At present, no clear conclusion is made on the aspect of selecting and matching key parameters of the spherical tooth hob, namely the spherical tooth hob with the key parameters for which stratum is selected is not made clear, so that the determination of the key structure parameters of the optimal spherical tooth hob under different stratums is very important. The method for determining key structural parameters of the spherical gear hob by adopting the spherical gear hob rock breaking test method is the most intuitive and reliable means, so that a shield spherical gear hob for the test is very necessary to be designed, and the spherical gear hob can adjust various key parameters, complete the cutting rock breaking test and provide guidance for selecting the optimal combination parameters.
Through research on relevant documents, relevant ball tooth hobs are designed by relevant units at present. Patent (application number: 201410339520.5) applied by Nanjing university of forestry and Central iron three offices group, Inc., with the name: a double-edged spherical tooth hob and an arrangement method thereof are designed, the arrangement method of the spherical tooth hob on a shield cutter head is provided, the parameters of the spherical tooth hob related to the patent are determined, the structure is not adjustable, and the rock breaking test use requirements of the spherical tooth hob cannot be met; the patent (application number: 201420362801.8) applied by Zhongyue Tunnel engineering office, Inc. is named as: the shield constructs with integral type twolip ball tooth hobbing cutter, has designed an integral type twolip ball tooth hobbing cutter structure, and this type ball tooth hobbing cutter also designs for engineering practicality, can't be applied to broken rock test.
In summary, although there are some related patents of the spherical-tooth hob at present, the spherical-tooth hob related to the existing patent is mainly biased to shield practical engineering application, and cannot be used for rock breaking tests of the spherical-tooth hob to realize optimization of different key structural parameters. Therefore, the invention designs the novel shield spherical tooth hob for the test with the adjustable multi-parameters of the diameter of the spherical teeth, the height of the spherical teeth, the distance between the spherical teeth and the multi-edge spherical tooth row spacing aiming at the actual research requirement of the design of the key structure parameters of the spherical tooth hob, and provides a research foundation for the optimization of the structure parameters of the spherical tooth hob.
Disclosure of Invention
The invention aims to provide a novel shield spherical tooth hob for rock breaking tests, which can realize effective adjustment of various key parameters such as different spherical tooth diameters, spherical tooth heights, spherical tooth intervals, multi-edge spherical tooth row distances and the like, is convenient for developing rock breaking test researches of spherical tooth hobs under different parameters, selects optimal key combination parameters under different stratums by acquiring the rock breaking load, the rock breaking energy consumption and other characteristics of the spherical tooth hobs under different structural parameters, and provides basis for design and model selection of the spherical tooth hobs under different stratums.
The invention is mainly realized by the following scheme that the invention mainly comprises a sensor, a connecting plate, a tool rest, a sleeve, a left tool ring, a hydraulic locking bolt, a spherical tooth, a baffle ring, an interval spacer ring, a tool ring locking plate, a tool shaft locking screw, a wedge block, a tool shaft, a left bearing, a left end cover, a sliding key, a right end cover, a right bearing, a right tool ring, a spherical tooth base, a hydraulic oil cavity and an expansion film.
The sensor with the connecting plate hookup, the connecting plate with the knife rest hookup, the arbor passes through the wedging piece hookup on the knife rest, there is the through-hole wedge inside, arbor locking screw passes the through-hole and screws to on the knife rest, realize locking the wedging piece with the arbor.
Two ends of the cutter shaft are connected to the tool rest, and the two sides of the tool rest are symmetrical; the left end cover, the left bearing, the right bearing and the right end cover are sequentially connected to the cutter shaft; the left end cover is positioned through the cutter shaft shoulder, the right side of the left end cover is in contact with the left bearing inner ring, and the left bearing inner ring and the left end cover inner ring are in interference fit with the cutter shaft respectively; the right bearing is distributed at the right end of the cutter shaft and is positioned by the right end cover, the inner ring of the right bearing is in interference fit with the cutter shaft, and the right end cover is in clearance fit with the cutter shaft; the left end cover, the left bearing, the right bearing and the right end cover outer ring are connected with the sleeve, the sleeve is in interference fit with the outer ring of the left bearing and the outer ring of the right bearing, the left end cover is in clearance fit with the sleeve, and the right end cover is connected with the sleeve through screws.
The sleeve is provided with a sliding key groove in the axial direction, the sliding key is matched in the sliding key groove, the sleeve is provided with the left cutter ring and the right cutter ring through the sliding key, meanwhile, the sleeve is provided with a plurality of spacing rings, the left cutter ring and the right cutter ring are positioned in the circumferential direction through the sliding key, the left cutter ring and the right cutter ring can slide in the sliding key groove through the sliding key to adjust the axial positions of the left cutter ring and the right cutter ring on the sleeve, and the left cutter ring and the right cutter ring are clamped by the plurality of spacing rings to determine the axial positions after the positions are adjusted, so that different multi-edge spherical tooth pitches are obtained; the space ring can be arranged on both sides of the left cutter ring or the right cutter ring; the spacing ring is composed of two semicircular rings with certain width through a hinge structure, and the other ends of the two semicircular rings can be connected through bolts and nuts after being sleeved on the sleeve to form a complete circular ring, so that the spacing ring is formed and sleeved on the sleeve; the left cutter ring, the spacing ring and the right cutter ring are tightly attached to each other along the axial direction to form a whole, the axial position of the whole is respectively determined by the blocking ring and the shaft shoulder of the sleeve in a clamping manner, the blocking ring is composed of an open ring piece, the blocking ring is welded at the opening of the blocking ring after being sleeved on the sleeve to form a closed blocking ring, and the axial positions of the left cutter ring, the spacing ring and the right cutter ring are limited; the fender ring can realize dismantling through relieving the welding position, then can dismantle left cutter ring or install more additional left cutter ring is through increasing or reducing the interval spacer ring is in order to realize the broken rock of multiple-edge ball tooth hobbing cutter.
The left cutter ring is provided with a convex hydraulic oil cavity and a dovetail groove cavity structure along the circumferential direction inside the cutter edge, the spherical tooth base is arranged in the dovetail groove cavity, and the spherical tooth base can slide along the dovetail groove in any one direction along the circumferential direction of the left cutter ring; the upper part of the spherical tooth base is connected with the spherical teeth through threads, and the depth of the threads is adjusted by screwing the spherical teeth to realize the height control of different spherical teeth; the spherical teeth can have spherical tooth shapes with different diameters so as to realize rock breaking tests of the spherical teeth with different diameters; the expansion film is distributed below the spherical tooth base and separates the hydraulic oil cavity from the dovetail groove cavity structure, the expansion film is tightly attached to the side surface of the hydraulic oil cavity, hydraulic oil is filled in the hydraulic oil cavity, three threaded holes are axially formed in one side surface of the left cutter ring of the hydraulic oil cavity, the hydraulic locking bolt is screwed in the threaded holes, and the expansion and the loosening of the expansion film are controlled by screwing the hydraulic locking bolt; when the expansion film is in a loosening stage, the ball tooth base is slid to meet different ball tooth spacing requirements according to the scale lines; the edge of the side face of the left cutter ring is provided with a small groove for placing or taking out the spherical tooth base, and after the spherical tooth base is placed or taken out, the small groove at the edge of the side face of the left cutter ring is blocked by the cutter ring locking plate and is screwed and fastened by two screws; the right cutter ring and the left cutter ring have the same structure.
Compared with the prior art, the rock breaking of the spherical tooth hob can be realized under the parameters of different spherical tooth diameters, spherical tooth heights, spherical tooth intervals and multi-edge spherical tooth row spacing, the spherical tooth hob can be single-edge or multi-edge, key parameters such as the spherical tooth diameters, the spherical tooth heights, the spherical tooth intervals and the multi-edge spherical tooth row spacing can be continuously adjusted, the problem that the structural parameters of the conventional spherical tooth hob are single is solved, the adjustment process of each parameter is simple and convenient, and the positioning and fastening are reliable. The spherical tooth hob related to the invention can be directly installed on a linear or rotary cutting test bed of the corresponding hob to break rock of the spherical tooth hob, and can provide a basis for optimization of structural parameters of the spherical tooth hob and matching of the spherical tooth hob under different stratums.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a cross-sectional view taken along plane A-A of FIG. 2;
FIG. 4 is a schematic front view of the left cutter ring;
FIG. 5 is a sectional view and a partially enlarged view taken along line B-B of FIG. 4;
FIG. 6 is a three-dimensional structure view of the tool holder;
FIG. 7 is a cross-sectional view of a spacing ring;
in the drawings: 1-sensor, 2-connecting plate, 3-tool rest, 4-sleeve, 5-left tool ring, 6-hydraulic locking bolt, 7-spherical tooth, 8-baffle ring, 9-spacing ring, 10-tool ring locking plate, 11-cutter shaft locking screw, 12-wedge block, 13-cutter shaft, 14-left bearing, 15-left end cover, 16-sliding key, 17-right end cover, 18-right bearing, 19-right tool ring, 20-spherical tooth base, 21-hydraulic oil cavity and 22-expansion film.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the novel shield spherical tooth hob for rock breaking test is composed of a sensor 1, a connecting plate 2, a hob head 3, a sleeve 4, a left cutter ring 5, a hydraulic locking bolt 6, spherical teeth 7, a baffle ring 8, an interval ring 9, a cutter ring locking plate 10, a cutter shaft locking screw 11, a wedge block 12, a cutter shaft 13, a left bearing 14, a left end cover 15, a sliding key 16, a right end cover 17, a right bearing 18, a right cutter ring 19, a spherical tooth base 20, a hydraulic oil cavity 21 and an expansion film 22.
As shown in fig. 1, 2, and 3, the sensor 1 is coupled to the coupling plate 2 by a bolt. The sensor 1 can measure three-way load and three-way vibration acceleration applied to the ball tooth hob in the rock breaking process, and transmits the three-way load and the three-way vibration acceleration to a corresponding working condition machine for collecting rock breaking load and vibration signals of the ball tooth hob; the connecting plate 2 is connected with the tool rest 3 through bolts, the number of the bolts is preferably even, and the bolts are symmetrically distributed around the tool rest 3, so that the stability of the whole tool rest after being loaded is ensured; the knife shaft 13 is connected to the knife rest 3 through the wedge block 12, a through hole is formed in the wedge block 12, and the knife shaft locking screw 11 penetrates through the through hole of the wedge block 12 and is screwed on the knife rest 3 to lock the wedge block 12 and the knife shaft 13, so that the knife loading process is realized.
Both ends of the cutter shaft 13 are connected on the cutter frame 3, and the cutter frame 3 is in a symmetrical structure as shown in figure 6; as shown in fig. 3, the cutter shaft is sequentially connected with a left end cover 15, a left bearing 14, a right bearing 18 and a right end cover 17; the left end cover 15 is positioned through the shaft shoulder of the cutter shaft 13, the right side of the left end cover 15 is contacted with the inner ring of the left bearing 14, and the inner ring of the left bearing 14 and the inner ring of the left end cover 15 are respectively in interference fit with the cutter shaft 13 to form a whole; the right bearing 18 is distributed at the right end of the cutter shaft 13 and is positioned by contacting the inner ring of the right bearing 18 with the right end cover 17, and the inner ring of the right bearing 18 is in interference fit with the cutter shaft 13 to form a whole; the right end cover 17 is in clearance fit with the cutter shaft 13, and a sealing ring is preferably arranged in the clearance to prevent impurities such as external dust from entering the right bearing 18; the outer rings of the left end cover 15, the left bearing 14, the right bearing 18 and the right end cover 17 are connected with the sleeve 4, the sleeve 4 is in interference fit with the outer rings of the left bearing 14 and the right bearing 18, the left end cover 15 and the sleeve 4 are in clearance fit, a sealing ring is preferably arranged in the clearance generally to prevent impurities such as outside dust from entering the left bearing 14, the right end cover 17 and the sleeve 4 are screwed down by screws along the axial direction of the cutter shaft 13 and connected, and therefore the sleeve 4, the outer ring of the left bearing 14, the outer ring of the right bearing 18 and the right end cover 17 are integrated.
As shown in fig. 3, the sleeve 4 is provided with a sliding key groove with a certain length in the axial direction, the length of the sliding key groove is determined according to the required maximum row pitch of the multi-edge spherical teeth, and a sliding key 16 is arranged in the sliding key groove; the sleeve 4 is provided with a left cutter ring 5 and a right cutter ring 19 through a sliding key 16; the sleeve 4 is provided with a plurality of spacing rings 9; the left cutter ring 5 and the right cutter ring 19 are positioned in the circumferential direction through the sliding key 16, so that the left cutter ring 5 and the right cutter ring 19 do not slide relative to the sleeve 4 in the circumferential direction; the left cutter ring 5 and the right cutter ring 19 can slide left and right in the sliding key groove through the sliding key 16 to adjust the axial positions of the cutter ring on the sleeve 4, after the axial positions of the left cutter ring 5 and the right cutter ring 19 are adjusted through the sliding key 16, the axial positions are determined by clamping the plurality of spacing rings 9, the spacing rings 9 can be distributed on the left side and the right side of the cutter ring, effective adjustment of different multi-edge spherical tooth pitches of the left cutter ring 5 and the right cutter ring 19 is achieved, only the spacing rings 9 are shown to be distributed between the left cutter ring 5 and the right cutter ring 19 in figure 3, and the multi-edge spherical tooth pitch is the largest at the moment.
As shown in fig. 7, the spacing spacer 9 is composed of two semicircular rings with a certain width, which are preferably two types, i.e. 5mm and 10mm, by a hinge structure, after the spacing spacer 9 is sleeved on the sleeve 4, the other ends of the two semicircular rings can be connected by bolts and nuts to form a complete circular ring, so that the complete spacing spacer 9 is formed and sleeved on the sleeve 4; as shown in fig. 3, the left cutter ring 5, the spacing ring 9 and the right cutter ring 19 are tightly attached to each other in the axial direction to form a whole, the axial position after the whole is respectively determined by the clamping of the retaining ring 8 and the shaft shoulder of the sleeve 4, the retaining ring 8 is formed by an open ring member, the opening of the retaining ring 8 is welded after the retaining ring 8 is sleeved on the sleeve 4 to form a closed retaining ring 8, the axial positions of the left cutter ring 5, the spacing ring 9 and the right cutter ring 19 are limited, fig. 3 illustrates that 10 spacing rings are additionally arranged between the left cutter ring 5 and the right cutter ring 19, if the width of the spacing ring 9 is 10mm, the multi-edge ball tooth row pitch of the two cutter rings is 100mm at the moment, the maximum multi-edge ball tooth row pitch is reached at the moment, and the actual size can be set according to the test requirements. When the row pitch of the multi-edge spherical teeth of the left cutter ring 5 and the right cutter ring 19 needs to be adjusted again, a part of the spacing ring 9 can be detached between the two cutter rings, then the row pitch of the multi-edge spherical teeth between the left cutter ring 5 and the right cutter ring 19 can be adjusted again, and after the adjustment is finished, the corresponding spacing ring 9 is additionally arranged on the left side of the left cutter ring 5 or the right side of the right cutter ring 19 respectively so as to obtain a new row pitch of the multi-edge spherical teeth between the left cutter ring 5 and the right cutter ring 19; the novel shield spherical tooth hob for the rock breaking test only presents a double-edge condition, as shown in fig. 3, but rock breaking of single-edge and three-edge or even more than three-edge spherical tooth hobs can be carried out, when the rock breaking test of the single-edge spherical tooth hob needs to be carried out, the baffle ring 8 can be removed, the left-side cutter ring 5 and the sliding key thereof are taken out, the vacated position of the left-side cutter ring is replaced by the interval ring, and then the rock breaking test of the single-edge spherical tooth hob can be carried out; when a rock breaking test of a three-edge or more than three-edge spherical tooth hob needs to be carried out, part of the spacing ring 9 can be removed, and the cutter ring and the sliding key 16 which have the same structure as the left cutter ring 5 are installed, so that the rock breaking test of the multi-edge spherical tooth hob can be realized, but the lengths of the sleeve 4 and the cutter shaft 13 need to be considered before the design, so that the row pitch of the multi-edge spherical teeth can be effectively adjusted.
As shown in fig. 5, the left cutter ring 5 is provided with a convex hydraulic oil chamber 21 and a dovetail groove cavity structure in the cutter edge along the circumferential direction, the button base 20 is installed in the dovetail groove cavity, and the button base 20 can slide along the dovetail groove in any one of the circumferential directions of the left cutter ring 5; the upper part of the button base 20 is connected with buttons 7 through threads, and the button 7 is screwed to adjust the thread depth, so that different button height requirements can be met; the buttons 7 with different diameters or different shapes can be connected to the button base 20 through threads so as to realize the rock breaking test of buttons with different diameters; an expansion film 22 is distributed below the button base 20, the expansion film 22 separates the hydraulic oil cavity 21 from the dovetail groove cavity structure, and the expansion film 22 is tightly attached to the upper side face of the hydraulic oil cavity 21. Preferably, a sealant is required to be added at the edge where the expansion film 22 is combined with the hydraulic oil chamber 21 to prevent leakage of hydraulic oil, and the material of the expansion film 22 is preferably a film material with good elasticity and strong leakage prevention capability; the hydraulic oil cavity 21 is filled with hydraulic oil, three threaded holes are axially formed in one side surface of the left cutter ring 5 of the hydraulic oil cavity 21, the hydraulic locking bolt 6 is screwed in the threaded holes, the expansion of the expansion film 22 is controlled by screwing the hydraulic locking bolt 6, and the ball tooth base 20 is propped against the inner wall of the dovetail groove to be attached to the inner wall of the dovetail groove, so that the ball tooth base 20 is fastened; when the hydraulic locking bolt 6 is unscrewed, the expansion film 22 recovers the original shape and has no extrusion effect on the button base 20, so that the button base 20 can slide along the dovetail groove in the circumferential direction; the other side surface of the left cutter ring 5 is provided with evenly distributed scale marks on the whole cutter ring surface, so that the position of the button base 20 can be conveniently determined; when the hydraulic locking bolt 6 is unscrewed, the button base 20 is slid according to the scale marks, the mutual positions between the buttons 7 are adjusted, and the requirements for different button intervals are met.
As shown in fig. 4, a small groove is formed at the edge of the side surface of the left cutter ring 5 for placing or taking out the button base 20, and after the button base 20 is placed or taken out, the small groove at the edge of the side surface of the left cutter ring 5 is blocked by the cutter ring locking plate 10 and is screwed tightly by two screws; the right cutter ring 19 and the left cutter ring 5 have the same structure.
The novel shield spherical tooth hob for the rock breaking test can be directly installed on a hob linear or rotary cutting test bed, single-edge and multi-edge spherical tooth hob rock breaking tests are developed by adjusting parameters such as the diameter of spherical teeth, the height of spherical teeth, the distance between spherical teeth and the row pitch of multi-edge spherical teeth, the change laws such as rock breaking load, rock breaking vibration and rock breaking energy consumption in the rock breaking process are obtained, and the basis is provided for structural design and model selection of the spherical tooth hob.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments. Modifications of other structural designs of the invention may be readily made by those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown herein, without departing from the general concept defined by the claims and their equivalents.
Claims (7)
1. The utility model provides a broken rock is experimental with shield structure ball tooth hobbing cutter which characterized in that: the device is composed of a sensor (1), a connecting plate (2), a tool rest (3), a sleeve (4), a left tool ring (5), a hydraulic locking bolt (6), spherical teeth (7), a baffle ring (8), an interval spacer ring (9), a tool ring locking plate (10), a cutter shaft locking screw (11), a wedge-caulking block (12), a cutter shaft (13), a left bearing (14), a left end cover (15), a sliding key (16), a right end cover (17), a right bearing (18), a right tool ring (19), a spherical tooth base (20), a hydraulic oil cavity (21) and an expansion film (22);
the sensor (1) is connected with the connecting plate (2), the connecting plate (2) is connected with the tool rest (3), the cutter shaft (13) is connected to the tool rest (3) through the wedge block (12), a through hole is formed in the wedge block (12), and the cutter shaft locking screw (11) penetrates through the through hole of the wedge block (12) and is connected to the tool rest (3);
both ends of the cutter shaft (13) are connected on the cutter rest (3), and the cutter rest (3) is in a symmetrical structure; the cutter shaft is connected with a left end cover (15), a left bearing (14), a right bearing (18), a right end cover (17) and a baffle ring (8); the left end cover (15) is positioned through the shaft shoulder of the cutter shaft (13), and the right side of the left end cover (15) is in contact with the inner ring of the left bearing (14); the right bearing (18) is distributed at the right end of the cutter shaft (13) and is positioned by a right end cover (17) contacting an inner ring of the right bearing (18); the outer rings of the left end cover (15), the left bearing (14), the right bearing (18) and the right end cover (17) are connected with a sleeve (4), and the right end cover (17) is connected with the sleeve (4) through screws;
the sleeve (4) is provided with a sliding key groove in the axial direction, and a sliding key (16) is arranged in the sliding key groove; the sleeve (4) is provided with a left cutter ring (5) and a right cutter ring (19) through a sliding key (16); a plurality of spacing rings (9) are arranged on the sleeve (4); the edge of the cutting edge of the left cutter ring (5) and the edge of the cutting edge of the right cutter ring (19) are provided with spherical tooth bases (20), and spherical teeth (7) are connected on the spherical tooth bases (20); the left cutter ring (5) is provided with a convex hydraulic oil cavity (21) and a dovetail groove cavity structure in the cutter edge along the circumferential direction, and the spherical tooth base (20) can slide along the dovetail groove in any one direction in the circumferential direction of the left cutter ring (5) to meet the requirements of different spherical tooth intervals; the hydraulic oil cavity (21) and the dovetail groove cavity structure are separated by an expansion film (22), and the expansion film (22) is tightly attached to the upper side surface of the hydraulic oil cavity (21); the hydraulic oil cavity (21) is filled with hydraulic oil, three threaded holes are axially formed in one side face of the left cutter ring (5) of the hydraulic oil cavity (21), the hydraulic locking bolt (6) is screwed in the threaded holes, the expansion and the loosening of the expansion film (22) are controlled by screwing the hydraulic locking bolt (6), the spherical tooth base (20) is fastened and loosened, and the other side face of the left cutter ring (5) is provided with uniformly distributed scale marks on the whole cutter ring face, so that the position of the spherical tooth base (20) can be conveniently adjusted.
2. The shield spherical tooth hob for the rock breaking test according to claim 1, characterized in that: the inner ring of the left bearing (14) and the inner ring of the left end cover (15) are respectively in interference fit with the cutter shaft (13); the inner ring of the right bearing (18) is in interference fit with the cutter shaft (13); the right end cover (17) is in clearance fit with the cutter shaft (13); the sleeve (4) is in interference fit with the outer rings of the left bearing (14) and the right bearing (18), and the left end cover (15) is in clearance fit with the sleeve (4).
3. The shield spherical tooth hob for the rock breaking test according to claim 1, characterized in that: the spherical teeth (7) are connected to the spherical tooth base (20) through threads, and the spherical teeth can be replaced by spherical teeth (7) with different diameters or different tooth shapes, so that the requirements of spherical teeth with different diameters or shapes are met; the screw thread depth is adjusted by screwing the spherical teeth (7), so that different spherical tooth height requirements are met.
4. The shield spherical tooth hob for the rock breaking test according to claim 1, characterized in that: the left cutter ring (5) and the right cutter ring (19) are positioned in the circumferential direction through a sliding key (16); the left cutter ring (5) and the right cutter ring (19) can slide left and right in the sliding key groove through the sliding key (16) to adjust the axial position on the sleeve (4), and are clamped by the plurality of spacing rings (9) and the retaining ring (8) to determine the axial position, the spacing rings (9) can be distributed on the left side and the right side of the left cutter ring (5) or the right cutter ring (19), and the requirements of adjusting different multi-edge spherical tooth row distances are met.
5. The shield spherical tooth hob for the rock breaking test according to claim 1, characterized in that: the spacing ring (9) is composed of two semicircular rings with certain width through a hinge structure, and after the spacing ring (9) is sleeved on the sleeve (4), the other ends of the two semicircular rings are connected by bolts and nuts to form the complete spacing ring (9).
6. The shield spherical tooth hob for the rock breaking test according to claim 1, characterized in that: the edge of the side surface of the left cutter ring (5) is provided with a small groove for placing or taking out the button base (20), and the small groove at the edge is blocked by a cutter ring locking plate (10) and is fastened by two screws.
7. The shield spherical tooth hob for the rock breaking test according to claim 1, characterized in that: the right cutter ring (19) and the left cutter ring (5) are identical in structure, the cutter ring can be detached or additionally installed, and a rock breaking test of a single-edge or multi-edge spherical tooth hob can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234779.2A CN110924966B (en) | 2019-12-05 | 2019-12-05 | Novel shield spherical tooth hob for rock breaking test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234779.2A CN110924966B (en) | 2019-12-05 | 2019-12-05 | Novel shield spherical tooth hob for rock breaking test |
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| Publication Number | Publication Date |
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| CN110924966A CN110924966A (en) | 2020-03-27 |
| CN110924966B true CN110924966B (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911234779.2A Active CN110924966B (en) | 2019-12-05 | 2019-12-05 | Novel shield spherical tooth hob for rock breaking test |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0748798Y2 (en) * | 1989-09-25 | 1995-11-08 | 株式会社小松製作所 | Disk cutter mounting device for tunnel machine |
| CN101446537B (en) * | 2008-11-10 | 2010-08-25 | 中南大学 | Adjustable multi-hob rock cutting fragmentation test means |
| CN101403308A (en) * | 2008-11-10 | 2009-04-08 | 中南大学 | Double-blade dish type hob cutter with adjustable tool space |
| JP2012207530A (en) * | 2012-08-01 | 2012-10-25 | Tokyu Construction Co Ltd | Structure of roller cutter |
| CN203905958U (en) * | 2014-07-02 | 2014-10-29 | 中交隧道工程局有限公司 | Integrated double-edged spherical tooth hob used for shield |
| CN105627900B (en) * | 2014-10-27 | 2018-08-14 | 湖南师范大学 | A kind of automatic calibration device measuring TBM hob abrasion amount current vortex sensor |
| CN108103399B (en) * | 2017-12-11 | 2019-07-19 | 中铁工程装备集团有限公司 | A kind of assembly technology of hobboing cutter spacer ring and spacer ring on disk cutter |
| CN209444335U (en) * | 2018-12-24 | 2019-09-27 | 江苏锐之锋工程刀具有限公司 | A kind of wear-resisting hobboing cutter of button |
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Effective date of registration: 20231218 Address after: Room 101, Office Building, No. 78, Jialong Road, Jiaming Development Zone, Dongchangfu District, Liaocheng City, Shandong Province, 252000 Patentee after: Shandong tuoda Engineering Equipment Co.,Ltd. Address before: 230000 b-1018, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Patentee before: HEFEI WISDOM DRAGON MACHINERY DESIGN Co.,Ltd. |