CN114576274B - Sliding bearing structure of rock-breaking hob for extremely hard rock - Google Patents
Sliding bearing structure of rock-breaking hob for extremely hard rock Download PDFInfo
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- CN114576274B CN114576274B CN202210149736.XA CN202210149736A CN114576274B CN 114576274 B CN114576274 B CN 114576274B CN 202210149736 A CN202210149736 A CN 202210149736A CN 114576274 B CN114576274 B CN 114576274B
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- main shaft
- bearing
- hob
- oil hole
- shell
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- 239000011435 rock Substances 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 60
- 239000012530 fluid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 239000003831 antifriction material Substances 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 8
- 238000005096 rolling process Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 46
- 239000010687 lubricating oil Substances 0.000 description 14
- 230000009471 action Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N37/00—Equipment for transferring lubricant from one container to another
- F16N37/003—Equipment for transferring lubricant from one container to another for filling bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a sliding bearing structure of a rock-breaking hob of extremely hard rock, which comprises a hob shell, a main shaft, a first end cover and a second end cover, wherein the hob shell is coaxially sleeved on the main shaft, the first end cover and the second end cover are respectively arranged at two ends of the hob shell and are respectively in sealing fit with two ends of the main shaft, bearing seats are respectively arranged in the two ends of the hob shell, bearing bushes are respectively sleeved at two ends of the surface of the main shaft, the bearing bushes are in rotary fit in the corresponding bearing seats, and the inner wall of each bearing bush is in rotary fit with the surface of the main shaft. According to the invention, by arranging the two bearing bushes and the bearing seat, the bearing is supported in a sliding support mode, and compared with the traditional rolling bearing, the running stability under high load accompanied by vibration impact is greatly improved, and the overall service life is prolonged; the length of the bearing bush at the large-diameter end of the cutter shell is longer than that of the bearing bush at the small-diameter end of the cutter shell, so that the bearing bush can stably bear the positive pressure of rock breaking of the hob and the thrust for driving the hob to rotate.
Description
Technical Field
The invention relates to the technical field of rock breaking hob. In particular to a sliding bearing structure of an extremely hard rock breaking hob.
Background
Rock breaking hob is a core component of mechanical rock breaking. A plurality of rock breaking hob are arranged on a reamer head of the inverted well drilling machine, under the combined action of the driving of a drill bit and the contact of bottom hole rock and hob cutter teeth, the hob rotates around a hob shaft, and the hob cutter teeth sequentially impact, squeeze and scrape the rock to break the rock, and chips are separated from a rock body to form an inverted well cylindrical space structure.
The existing hob shell and the hob shaft are connected by adopting a rolling bearing generally, and the hob is subjected to a larger load and is accompanied by impact and vibration in the drilling process of a hard rock stratum. Under the repeated action of contact stress, the surfaces of the rolling bearing ring and the rolling body are easy to generate failure modes such as pitting corrosion, fatigue peeling and the like, and the service life and the working progress of the hob are influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the sliding bearing structure of the extremely hard rock breaking hob, which has high bearing capacity and stable and reliable work.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an extremely hard rock broken rock hobbing cutter slide bearing structure, includes cutter shell, main shaft, first end cover and second end cover, the coaxial cover of cutter shell is in on the main shaft, first end cover and second end cover are installed respectively on the both ends of cutter shell and respectively with the both ends sealing fit of main shaft, all be provided with the bearing frame in the both ends of cutter shell, the cover has the axle bush on the surface both ends of main shaft, the axle bush normal running fit is in corresponding bearing frame, the inner wall of axle bush normal running fit with the surface of main shaft, the clearance between axle bush inner wall and the main shaft is less than the clearance between axle bush outer wall and the bearing frame, the surface of main shaft with the bearing bush contact load position department is provided with wear-resisting material; an axial oil hole is formed in the main shaft along the axial direction of the main shaft, the axial oil hole is in fluid conduction with a space between the cutter shell and the main shaft, a movable piston column is arranged in the axial oil hole, and the side wall of the piston column is in sliding sealing fit with the inner side wall of the axial oil hole.
According to the sliding bearing structure of the extremely hard rock breaking hob, the shape of the hob shell is frustum-shaped, and the length of the bearing bush positioned in the end with the larger outer diameter of the hob shell is larger than that of the bearing bush positioned in the end with the smaller outer diameter of the hob shell; the length of the bearing seat in the end with the larger outer diameter of the cutter shell is larger than that in the end with the smaller outer diameter of the cutter shell, the first end cover is installed on the end with the smaller outer diameter of the cutter shell, and the second end cover is installed on the end with the larger outer diameter of the cutter shell.
According to the sliding bearing structure of the extremely hard rock breaking hob, one end of the axial oil hole is internally provided with the threaded plug with the hole in a sealing manner, the other end of the axial oil hole is internally provided with the plunger in a sealing manner, one end of the plunger positioned in the axial oil hole is coaxially fixed with the shoulder tip cone, and the diameter of the shoulder tip cone is smaller than the inner diameter of the axial oil hole; the piston column is coaxially arranged in the axial oil hole, a sealing ring is sleeved on the piston column, the outer wall of the sealing ring is in sealing fit with the inner wall of the axial oil hole, and a threaded hole is formed in the end face, close to the first end cover, of the piston column; the main shaft is provided with a radial oil hole along the radial direction, the radial oil hole is close to the second end cover, the axis of the radial oil hole is opposite to the middle of the shoulder tip cone, one end of the radial oil hole is in fluid conduction with the axial oil hole, and the other end of the radial oil hole is in fluid conduction with a space between the cutter shell and the main shaft; an exhaust port is formed in the side wall of the first end cover, the exhaust port is communicated with the space between the cutter shell and the main shaft in a fluid mode, and a sealing plug is arranged in the exhaust port.
According to the sliding bearing structure of the extremely hard rock breaking hob, the gap between the inner wall of the bearing bush and the main shaft is smaller than the gap between the outer wall of the bearing bush and the bearing seat by 0.1-0.2mm.
According to the sliding bearing structure of the extremely hard rock breaking hob, the crescent groove is formed in the side wall surface of the main shaft, and the wear-resistant material is filled in the crescent groove.
According to the sliding bearing structure of the extremely hard rock breaking hob, the bearing shoulders are arranged in the middle of the main shaft, the thrust bearings are arranged on two sides of the main shaft, and the outer side wall surfaces of the two thrust bearings are respectively supported on one side wall surface, close to each other, of the two bearing seats.
According to the sliding bearing structure of the extremely hard rock breaking hob, the spherical teeth are distributed on the conical surface of the cutter shell, and the flat teeth are distributed on one end of the cutter shell with larger outer diameter.
According to the sliding bearing structure of the extremely hard rock breaking hob, the threaded sleeve is arranged in the end, with the larger outer diameter, of the hob shell, and the second end cover is arranged in the threaded sleeve; end face sealing rings are lapped on the end faces, away from each other, of the two bearing seats, a second sealing ring is in sealing fit between the first end cover and one end face sealing ring, and a second sealing ring is also in sealing fit between the second end cover and the other end face sealing ring; the two ends of the main shaft are respectively provided with a first sealing ring in a sealing fit mode, one first sealing ring is tightly pressed between the first end cover and the corresponding bearing bush, and the other first sealing ring is tightly pressed between the second end cover and the corresponding bearing bush.
The technical scheme of the invention has the following beneficial technical effects:
1. by arranging the two bearing bushes and the bearing seat, the bearing is supported in a sliding support mode, and compared with the traditional rolling bearing, the running stability of high load accompanied by vibration impact is greatly improved, and the overall service life is prolonged; the length of the bearing bush at the large-diameter end of the cutter shell is longer than that of the bearing bush at the small-diameter end of the cutter shell, so that the bearing bush can stably bear the positive pressure of rock breaking of the hob and the thrust for driving the hob to rotate.
2. The inner wall and the main shaft sliding fit of axle bush, the outer wall of axle bush and the inner wall sliding fit of bearing frame form two friction pairs, and conventional axle bush only has a friction surface, and the sword shell rotates one round, and the axle bush also can rotate one round, and the axle bush in this patent is owing to having two friction surfaces, and the sword shell rotates one round, and the axle bush only rotates half circle, greatly reduced the vice relative sliding speed of friction, the reduction wearing and tearing volume to very big improvement life.
3. The gap between the inner wall of the bearing bush and the main shaft is smaller than the gap between the outer wall of the bearing bush and the bearing seat, and the friction forces of the inner friction surface and the outer friction surface of the bearing bush can be balanced due to different moments, so that the service lives of the two surfaces of the bearing bush are close, and the situation of eccentric wear or excessive wear on one side is avoided.
4. The main shaft and the two sides of the cutter shell are sealed, lubricating oil is injected through the axial oil holes, gaps among the main shaft, the bearing bush and the bearing seat are sequentially lubricated, the friction force between friction surfaces is greatly reduced, and the service life is prolonged; when the lubricating oil expands with heat and contracts with cold, the pressure of the lubricating oil can be balanced by utilizing the displacement of the piston column, so that the leakage or insufficient lubrication of the lubricating oil is effectively prevented, and the service life is further prolonged.
5. And the surfacing wear-resistant material is carried out on the stress side of the main shaft, so that the wear resistance of the stress contact surface of the main shaft and the bearing bush is ensured when the hob works, and the service life of the main shaft is prolonged.
Drawings
FIG. 1 is a schematic elevational cross-sectional view of the present invention;
figure 2 is a schematic cross-sectional view of the present invention.
The reference numerals in the drawings are as follows: 1-a cutter shell; 2-flat teeth; 3-button teeth; 4-a main shaft; 5-bearing bushes; 6-bearing seats; 7-a first sealing ring; 8-a first end cap; 9-a second sealing ring; 10-end face seal ring; 11-a threaded plug with a hole; 12-piston column; 13-a plunger; 131-shoulder tip cone; 14-an axial oil hole; 15-thrust bearing; 16-a thread sleeve; 17-a second end cap; 18-a wear-resistant material; 19-an exhaust port; 20-radial oil holes.
Detailed Description
In the embodiment, as shown in fig. 1 and 2, the sliding bearing structure of the extremely hard rock-breaking hob comprises a hob shell 1, a main shaft 4, a first end cover 8 and a second end cover 17, wherein the hob shell 1 is coaxially sleeved on the main shaft 4, the first end cover 8 and the second end cover 17 are respectively arranged at two ends of the hob shell 1 and respectively matched with two ends of the main shaft 4 in a sealing manner, bearing seats 6 are respectively arranged in two ends of the hob shell 1, bearing bushes 5 are respectively sleeved at two ends of the surface of the main shaft 4, the bearing bushes 5 are in rotary fit in the corresponding bearing seats 6, and the inner wall of the bearing bushes 5 are in rotary fit with the surface of the main shaft 4; the length of the bearing bush at the large-diameter end of the cutter shell is longer than that of the bearing bush at the small-diameter end of the cutter shell, so that the bearing bush can stably bear the positive pressure of rock breaking of the hob and the thrust for driving the hob to rotate; the inner wall and the main shaft sliding fit of axle bush, the outer wall of axle bush and the inner wall sliding fit of bearing frame form two friction pairs, and conventional axle bush only has a friction surface, and the sword shell rotates one round, and the axle bush also can rotate one round, and the axle bush in this patent is owing to having two friction surfaces, and the sword shell rotates one round, and the axle bush only rotates half circle, greatly reduced the vice relative sliding speed of friction, the reduction wearing and tearing volume to very big improvement life.
The gap between the inner wall of the bearing bush 5 and the main shaft 4 is smaller than the gap between the outer wall of the bearing bush 5 and the bearing seat 6, the gap between the inner wall of the bearing bush 5 and the main shaft 4 is smaller than the gap between the outer wall of the bearing bush 5 and the bearing seat 6 by 0.1-0.2mm, the gap between the inner wall of the bearing bush and the main shaft is smaller than the gap between the outer wall of the bearing bush and the bearing seat, and because the moments born by the inner friction surface and the outer friction surface of the bearing bush are different, the friction forces of the inner friction surface and the outer friction surface of the bearing bush can be balanced, the service lives of the two surfaces of the bearing bush are close, and the situation of eccentric wear or excessive wear on one side is avoided; the bearing bush 5 is characterized in that a wear-resistant material 18 is arranged at a loaded position where the surface of the main shaft 4 is in contact with the bearing bush 5, a crescent groove is formed in the side wall surface of the main shaft 4, the wear-resistant material 18 is filled in the crescent groove, and the wear-resistant material is deposited on the stressed side of the main shaft, so that the wear resistance of the stressed contact surface of the main shaft and the bearing bush is ensured when the hob works, and the service life of the main shaft is prolonged; an axial oil hole 14 is formed in the main shaft 4 along the axial direction of the main shaft, the axial oil hole 14 is in fluid communication with a space between the cutter shell 1 and the main shaft 4, a piston column 12 is movably arranged in the axial oil hole 14, the side wall of the piston column 12 is in sliding sealing fit with the inner side wall of the axial oil hole 14, the two sides of the main shaft and the cutter shell are respectively in sealing arrangement, lubricating oil is injected through the axial oil hole, gaps among the main shaft, a bearing bush and a bearing seat are sequentially lubricated, friction force among friction surfaces is greatly reduced, and the service life is prolonged; when the lubricating oil expands with heat and contracts with cold, the pressure of the lubricating oil can be balanced by utilizing the displacement of the piston column, so that the leakage or insufficient lubrication of the lubricating oil is effectively prevented, and the service life is further prolonged.
A bearing shoulder is arranged in the middle of the main shaft 4, thrust bearings 15 are arranged on two sides of the main shaft 4 positioned on the bearing shoulder, and the outer side wall surfaces of the two thrust bearings 15 are respectively arranged on one side wall surface for supporting the two bearing seats 6 to be close to each other; the conical surface of the cutter shell 1 is provided with spherical teeth 3, and one end of the cutter shell 1 with a larger outer diameter is provided with flat teeth 2.
The cutter shell 1 is in a frustum shape, and the length of the bearing bush 5 positioned in the end with the larger outer diameter of the cutter shell 1 is longer than that of the bearing bush positioned in the end with the smaller outer diameter of the cutter shell 1; the length of the bearing seat 6 positioned in the end with the larger outer diameter of the cutter shell 1 is longer than that of the bearing seat 6 positioned in the end with the smaller outer diameter of the cutter shell 1, the first end cover 8 is installed on the end with the smaller outer diameter of the cutter shell 1, and the second end cover 17 is installed on the end with the larger outer diameter of the cutter shell 1; a threaded plug 11 with a hole is arranged in one end of the axial oil hole 14 in a sealing manner, a plunger 13 is arranged in the other end of the axial oil hole 14 in a sealing manner, a shoulder tip cone 131 is coaxially fixed on one end of the plunger 13 positioned in the axial oil hole 14, and the diameter of the shoulder tip cone 131 is smaller than the inner diameter of the axial oil hole 14; the piston column 12 is coaxially arranged in the axial oil hole 14, a sealing ring is sleeved on the piston column 12, the outer wall of the sealing ring is in sealing fit with the inner wall of the axial oil hole 14, and a threaded hole is formed in the end face, close to the first end cover 8, of the piston column 12; the spindle 4 is radially provided with a radial oil hole 20, the radial oil hole 20 is close to the second end cover 17, the axis of the radial oil hole 20 is opposite to the middle of the shoulder tip cone 131, one end of the radial oil hole 20 is in fluid communication with the axial oil hole 14, and the other end of the radial oil hole 20 is in fluid communication with a space between the cutter shell 1 and the spindle 4; an exhaust port 19 is formed in the side wall of the first end cover 8, the exhaust port 19 is in fluid communication with a space between the cutter shell 1 and the spindle 4, and a sealing plug is installed in the exhaust port 19.
A threaded sleeve 16 is arranged in one end of the cutter shell 1 with a larger outer diameter, and the second end cover 17 is arranged in the threaded sleeve 16; the end faces of the two bearing seats 6 far away from each other are respectively overlapped with an end face sealing ring 10, a second sealing ring 9 is in sealing fit between the first end cover 8 and one end face sealing ring 10, and a second sealing ring 9 is also in sealing fit between the second end cover 17 and the other end face sealing ring 10; first sealing rings 7 are hermetically matched with two ends of the main shaft 4, one first sealing ring 7 is pressed between the first end cover 8 and the corresponding bearing bush 5, and the other first sealing ring 7 is pressed between the second end cover 17 and the corresponding bearing bush 5.
Working principle: when oiling, firstly unscrewing the threaded plug 11 with holes, inserting a screw rod into the axial oil hole 14, screwing the end part of the screw rod into the threaded hole on the end surface of the piston column 12 to realize connection, pulling the screw rod to pull out the piston column 12, connecting an oil injection pipe of an oiling device with the axial oil hole 14, starting the oiling device, injecting lubricating oil into the axial oil hole 14, and flowing into a space between the cutter shell 1 and the main shaft 4 through the radial oil hole 20, and under the action of oil pressure, carrying out permeation and lubrication between the bearing bush 5 and the main shaft 4 and between the bearing bush 5 and the bearing seat 6, and when the exhaust port 19 continuously and uniformly flows out in the exhaust port 19, indicating that the lubricating oil is full, and stopping oiling;
after oiling is finished, removing an oiling pipe of oiling equipment, then loading the piston column 12 into the axial oil hole 14 through a screw rod, pushing the piston column 12 to a position close to the middle of the main shaft 4, then rotating the screw rod, taking down and extracting the screw rod, and reinstalling the threaded plug 11 with the hole on the axial oil hole 14; when the hob is in operation, the temperature of the lubricating oil is increased along with continuous friction, the volume is increased, the piston column 12 is pushed to move towards the first end cover 8 side, when the temperature is reduced, the volume of the lubricating oil is reduced, the piston column 12 is pulled to move towards the second end cover 17 side, along with continuous consumption of the lubricating oil, the piston column 12 is continuously close to the second end cover 17 until the piston column 12 is propped against the shoulder top cone 131, the shoulder top cone 131 can prevent the piston column 12 from crossing the radial oil hole 20, the limiting effect is achieved, reverse leakage of the lubricating oil through the radial oil hole 20 is prevented, and external dirt is prevented from entering a lubricating surface; during rotary operation of the hob, the pressure exerted by the housing 1 acts on the spindle 4, while the wear-resistant material 18 is in the friction position, thereby increasing the service life.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While the obvious variations or modifications which are extended therefrom remain within the scope of the claims of this patent application.
Claims (5)
1. The utility model provides a broken rock hobbing cutter slide bearing structure of extremely hard rock, its characterized in that, includes cutter shell (1), main shaft (4), first end cover (8) and second end cover (17), cutter shell (1) coaxial cover is in on main shaft (4), first end cover (8) and second end cover (17) are installed respectively on the both ends of cutter shell (1) and respectively with the both ends sealing fit of main shaft (4), all be provided with bearing frame (6) in the both ends of cutter shell (1), cover has axle bush (5) on the surface both ends of main shaft (4), axle bush (5) normal running fit is in corresponding in bearing frame (6), the inner wall of axle bush (5) with the surface normal running fit of main shaft (4), the clearance between axle bush (5) inner wall with main shaft (4) is less than the clearance between axle bush (5) outer wall and bearing frame (6), the surface of main shaft (4) and the bearing bush (5) contact the surface is provided with antifriction material (18) in the position of receiving that is provided with. An axial oil hole (14) is formed in the main shaft (4) along the axial direction of the main shaft, the axial oil hole (14) is in fluid communication with a space between the cutter shell (1) and the main shaft (4), a piston column (12) is movably arranged in the axial oil hole (14), and the side wall of the piston column (12) is in sliding sealing fit with the inner side wall of the axial oil hole (14);
the gap between the inner wall of the bearing bush (5) and the main shaft (4) is 0.1-0.2mm smaller than the gap between the outer wall of the bearing bush (5) and the bearing seat (6);
a crescent groove is formed in the side wall surface of the main shaft (4), and the wear-resistant material (18) is filled in the crescent groove;
the middle of the main shaft (4) is provided with a bearing shoulder, thrust bearings (15) are arranged on two sides of the main shaft (4) positioned on the bearing shoulder, and the outer side wall surfaces of the two thrust bearings (15) are respectively supported on one side wall surface of the two bearing seats (6) which are close to each other.
2. An extremely hard rock breaking hob sliding bearing structure according to claim 1, characterized in, that the shape of the hob shell (1) is frustum-shaped, the length of the bushing (5) in the end of the hob shell (1) with larger outer diameter is larger than the bushing length in the end of the hob shell (1) with smaller outer diameter; the length of the bearing seat (6) positioned in the end with the larger outer diameter of the cutter shell (1) is larger than the length of the bearing seat (6) positioned in the end with the smaller outer diameter of the cutter shell (1), the first end cover (8) is installed on the end with the smaller outer diameter of the cutter shell (1), and the second end cover (17) is installed on the end with the larger outer diameter of the cutter shell (1).
3. The sliding bearing structure of the extremely hard rock breaking hob according to claim 2, characterized in that a threaded plug (11) with a hole is installed in one end of the axial oil hole (14) in a sealing manner, a plunger (13) is installed in the other end of the axial oil hole (14) in a sealing manner, a shoulder tip cone (131) is coaxially fixed on one end of the plunger (13) located in the axial oil hole (14), and the diameter of the shoulder tip cone (131) is smaller than the inner diameter of the axial oil hole (14); the piston column (12) is coaxially arranged in the axial oil hole (14), a sealing ring is sleeved on the piston column (12), the outer wall of the sealing ring is in sealing fit with the inner wall of the axial oil hole (14), and a threaded hole is formed in the end face, close to the first end cover (8), of the piston column (12); a radial oil hole (20) is formed in the main shaft (4) along the radial direction of the main shaft, the radial oil hole (20) is close to the second end cover (17), the axis of the radial oil hole (20) is opposite to the middle of the shoulder tip cone (131), one end of the radial oil hole (20) is in fluid conduction with the axial oil hole (14), and the other end of the radial oil hole (20) is in fluid conduction with a space between the cutter shell (1) and the main shaft (4); an exhaust port (19) is formed in the side wall of the first end cover (8), the exhaust port (19) is in fluid communication with a space between the cutter shell (1) and the main shaft (4), and a sealing plug is arranged in the exhaust port (19).
4. The sliding bearing structure of the extremely hard rock breaking hob according to claim 2 is characterized in that spherical teeth (3) are distributed on the conical surface of the hob shell (1), and flat teeth (2) are distributed on one end of the hob shell (1) with larger outer diameter.
5. An extremely hard rock breaking hob sliding bearing structure according to claim 2, characterized in, that a threaded sleeve (16) is mounted in the end of the shell (1) with larger outer diameter, the second end cap (17) being mounted in the threaded sleeve (16); the end faces of the two bearing seats (6) far away from each other are respectively lapped with an end face sealing ring (10), a second sealing ring (9) is in sealing fit with one end face sealing ring (10) between the first end cover (8), and a second sealing ring (9) is also in sealing fit with the other end face sealing ring (10) between the second end cover (17); the two ends of the main shaft (4) are respectively provided with a first sealing ring (7) in a sealing fit mode, one first sealing ring (7) is tightly pressed between the first end cover (8) and the corresponding bearing bush (5), and the other first sealing ring (7) is tightly pressed between the second end cover (17) and the corresponding bearing bush (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149736.XA CN114576274B (en) | 2022-02-18 | 2022-02-18 | Sliding bearing structure of rock-breaking hob for extremely hard rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149736.XA CN114576274B (en) | 2022-02-18 | 2022-02-18 | Sliding bearing structure of rock-breaking hob for extremely hard rock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114576274A CN114576274A (en) | 2022-06-03 |
| CN114576274B true CN114576274B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210149736.XA Active CN114576274B (en) | 2022-02-18 | 2022-02-18 | Sliding bearing structure of rock-breaking hob for extremely hard rock |
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| CN (1) | CN114576274B (en) |
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| CN201884033U (en) * | 2010-11-02 | 2011-06-29 | 北京中煤矿山工程有限公司 | Constant-pressure compound sealing structure of mining deep well rock breaking hob cutter |
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| CN206220866U (en) * | 2016-11-30 | 2017-06-06 | 洛阳九久科技股份有限公司 | A kind of anti-well hob-cutter structure of 12 cun of heavily loaded double containment |
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| CN109488211A (en) * | 2018-10-25 | 2019-03-19 | 北京中煤矿山工程有限公司 | Anti- well drilling machine inserted tooth hob with hydraulic drilling |
| CN110331942A (en) * | 2019-07-23 | 2019-10-15 | 中交第三航务工程局有限公司 | A kind of hobboing cutter on clean-out machine for breaking extremely hard rock |
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2022
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| CN103352706A (en) * | 2013-05-30 | 2013-10-16 | 大连理工大学 | Method for designing center bigeminal hobs of heading machine |
| CN107076198A (en) * | 2014-10-24 | 2017-08-18 | 川崎重工业株式会社 | Floating bush bearing and ship exhaust steam turbine |
| CN206220866U (en) * | 2016-11-30 | 2017-06-06 | 洛阳九久科技股份有限公司 | A kind of anti-well hob-cutter structure of 12 cun of heavily loaded double containment |
| CN109281684A (en) * | 2018-10-25 | 2019-01-29 | 北京中煤矿山工程有限公司 | A kind of anti-well drilling machine inserted tooth hob of quick-detachable sliding bearing |
| CN109488211A (en) * | 2018-10-25 | 2019-03-19 | 北京中煤矿山工程有限公司 | Anti- well drilling machine inserted tooth hob with hydraulic drilling |
| CN110331942A (en) * | 2019-07-23 | 2019-10-15 | 中交第三航务工程局有限公司 | A kind of hobboing cutter on clean-out machine for breaking extremely hard rock |
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|---|---|
| CN114576274A (en) | 2022-06-03 |
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