CN219953242U - Double-composite sealing structure of roller bit bearing - Google Patents
Double-composite sealing structure of roller bit bearing Download PDFInfo
- Publication number
- CN219953242U CN219953242U CN202321515541.9U CN202321515541U CN219953242U CN 219953242 U CN219953242 U CN 219953242U CN 202321515541 U CN202321515541 U CN 202321515541U CN 219953242 U CN219953242 U CN 219953242U
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- outer channel
- bearing
- sealing
- channel sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 137
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 210000000078 claw Anatomy 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000002002 slurry Substances 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 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
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model relates to the technical field of drilling tools and provides a double-composite sealing structure of a roller bit bearing, which comprises an insert roller, wherein a claw shaft is sleeved inside one side of the insert roller, and a sealing mechanism for preventing mud from entering the bearing is arranged between the insert roller and the claw shaft. According to the utility model, the bearing sealing function of the roller bit is realized through the arrangement of the sealing mechanism, and the slurry generated during drilling is isolated outside the outer channel sealing groove under the action of the outer channel sealing ring I, the outer channel sealing ring II and the outer channel sealing groove, so that the rubber sealing ring can work in a clean space environment, the problem that the common rubber sealing is accelerated to be worn after being immersed by external slurry is solved, the service life of the roller bit is prolonged, and the manufacturing cost of the sealing ring is far lower than that of a metal sealing bearing although the manufacturing cost is slightly higher than that of the common rubber sealing ring through the high-quality and low-cost sealing ring material, so that the requirement of daily drilling work can be met.
Description
Technical Field
The utility model relates to the technical field of drilling tools, in particular to a double-composite sealing structure of a roller bit bearing.
Background
Along with the rapid development of modern petroleum natural gas drilling technology, the requirements on engineering construction quality and operation progress are continuously improved, and the requirements on the drilling of the roller bit are higher. The working life of the roller bit mainly depends on the stability and reliability of the bearing system operation of the bit bearing under the condition of bearing high bit pressure and high rotating speed, and the key of the operation of the bearing system is the stability, reliability and durability of the sealing device of the bearing. At present, the bearing seal of the roller bit is mainly metal seal and common rubber seal, and the roller bit with the metal seal bearing has high running stability and reliability, but has high manufacturing difficulty and high cost. The common rubber seal bearing is simple to manufacture, the cost is less than one twentieth of the cost of the metal seal bearing combined by the metal rings, the manufacturing cost is very low, but the service time is shorter than that of a roller bit of the metal seal bearing, and the common rubber seal bearing is inferior to the metal seal bearing in a severe working environment, so that the sealing structure with low manufacturing cost and long service time is lacking.
Disclosure of Invention
The utility model aims to solve the defects that the bearing sealing structure in the prior art is not easy to consider low in manufacturing cost and long in service time, and provides a double-composite sealing structure of a roller bit bearing.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the double composite sealing structure of the roller bit bearing comprises an insert roller and hard alloy cutting teeth arranged on the insert roller, wherein a tooth claw shaft is sleeved inside one side of the insert roller, one end of the tooth claw shaft is rotationally connected with a leg, and a sealing mechanism for preventing mud from entering the bearing is arranged between the insert roller and the tooth claw shaft;
the sealing mechanism comprises an outer channel sealing groove and an inner channel sealing groove which are arranged on the inner side of the insert cone, the outer channel sealing groove and the inner channel sealing groove are sequentially arranged in sequence from outside to inside, an outer channel sealing ring I is arranged in the outer channel sealing groove, an outer channel sealing ring II is sleeved between the outer channel sealing groove and the outer channel sealing ring I, and a rubber sealing ring is arranged in the inner channel sealing groove.
Preferably, the first outer channel sealing ring is made of polytetrafluoroethylene, and the second outer channel sealing ring and the rubber sealing ring are made of rubber materials.
Preferably, a cross section of the outer channel sealing ring is provided as a rectangular cross section.
Preferably, the second cross section of the outer channel sealing ring is an O-shaped cross section.
Preferably, the cross section of the rubber sealing ring is a special-shaped cross section, and the inner side of the special-shaped cross section is thicker than the outer side of the special-shaped cross section.
Preferably, a bearing ball channel is arranged at the connecting end of the claw shaft and the leg, and a steel ball is arranged in the bearing ball channel in a rolling way.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the bearing sealing function of the roller bit is realized through the arrangement of the sealing mechanism, and the slurry generated during drilling is isolated outside the outer channel sealing groove under the action of the outer channel sealing ring I, the outer channel sealing ring II and the outer channel sealing groove, so that the rubber sealing ring can work in a clean space environment, the problem that the common rubber sealing is accelerated to be worn after being immersed by external slurry is solved, the sealing performance is greatly improved, the service life of the roller bit is prolonged, and the manufacturing cost of the sealing ring is lower than that of the common rubber sealing ring although the sealing ring is slightly higher than that of a metal sealing bearing, so that the requirement of daily drilling work can be met.
2. According to the utility model, through the arrangement of the bearing ball channel and the steel ball, the sliding friction during the rotation of the gripper shaft can be changed into rolling friction, so that the friction force in the power transmission process is reduced in a rolling manner, the friction force is reduced, the transmission efficiency of mechanical power is improved, the friction loss of the gripper shaft is reduced, and the practicability of the device is improved.
Drawings
FIG. 1 is a schematic view of a dual composite seal structure of the present utility model;
FIG. 2 is an enlarged schematic view of the area A in FIG. 1;
FIG. 3 is a cross-sectional view of a cutting cone of the present utility model;
FIG. 4 is a cross-sectional view of an outer seal ring of the present utility model;
FIG. 5 is a second cross-sectional view of the outer seal ring of the present utility model;
fig. 6 is a cross-sectional view of a rubber seal ring of the present utility model.
In the figure: 1. insert cone; 11. cemented carbide cutting teeth; 2. a pawl shaft; 21. a bearing ball race; 22. a steel ball; 3. a sealing mechanism; 31. an outer channel seal groove; 32. an inner channel seal groove; 33. an outer channel sealing ring I; 331. rectangular cross section; 34. an outer channel sealing ring II; 341. an O-shaped cross section; 35. a rubber seal ring; 351. a special-shaped section.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1-6, a dual composite sealing structure of a roller bit bearing comprises an insert roller 1 and a hard alloy cutting tooth 11 arranged on the insert roller 1, wherein a claw shaft 2 is sleeved inside one side of the insert roller 1, one end of the claw shaft 2 is rotationally connected with a bit leg, a sealing mechanism 3 for preventing mud from entering the bearing is arranged between the insert roller 1 and the claw shaft 2, during assembly, the claw shaft 2 can be firstly arranged on the bit leg, then the insert roller 1 is sleeved outside the claw shaft 2, when rock is broken by drilling, the insert roller 1 can be driven to rotate by the claw shaft 2, corresponding holes can be drilled by utilizing the hard alloy cutting tooth 11 arranged outside the insert roller 1, and the sealing mechanism 3 arranged between the insert roller 1 and the claw shaft 2 can effectively prevent the mud generated in the drilling process from entering the connecting bearing between the claw shaft 2 and the bit leg, so that the loss of the bearing is reduced, and the service life of the roller bit is prolonged.
The sealing mechanism 3 comprises an outer channel sealing groove 31 and an inner channel sealing groove 32 which are arranged on the inner side of the insert cone 1, the outer channel sealing groove 31 and the inner channel sealing groove 32 are sequentially arranged in sequence from outside to inside, an outer channel sealing ring I33 is arranged in the outer channel sealing groove 31, an outer channel sealing ring II 34 is sleeved between the outer channel sealing groove 31 and the outer channel sealing ring I33, a rubber sealing ring 35 is arranged in the inner channel sealing groove 32, in the using process of the cone bit, the outer channel sealing ring I33 arranged in the outer channel sealing groove 31 can isolate mud generated in the drilling process from the outer channel sealing groove 31, so that the rubber sealing ring 35 arranged in the inner channel sealing groove 32 can work in a clean space environment, the problem that the common rubber sealing is accelerated to be worn after being immersed by the external mud is solved, meanwhile, the pressure difference effect of stabilizing the inner sealing surface is realized, the sealing surface is not easy to break, the sealing performance is greatly improved, the service life of the cone bit is prolonged, the comprehensive value of on site drilling construction is improved, meanwhile, the outer channel sealing ring II 34 sleeved outside the outer channel sealing ring 31 can be isolated from the outer channel sealing ring 31 through the inner wall of the outer channel sealing ring 31, the inner wall is mutually abutting against the outer channel 31, the moving distance of the outer channel sealing ring 33 is limited, and vibration is reduced, vibration is influenced by the vibration of the cone bit, and vibration is reduced.
The manufacturing materials of the first outer channel seal ring 33 are polytetrafluoroethylene, the manufacturing materials of the second outer channel seal ring 34 and the rubber seal ring 35 are rubber materials, the polytetrafluoroethylene is a polymer of tetrafluoroethylene monomers, the polytetrafluoroethylene has good chemical stability and thermal stability, almost all strong acid, strong alkali or strong oxidant, organic solvent and the like do not work on the polytetrafluoroethylene, therefore, the polytetrafluoroethylene and the rubber seal ring 33 are not easy to corrode when the cutter bit is drilled by acid, alkali or solution containing strong oxidant, in addition, according to the physical rule of friction heat generation, the outer temperature of the cutter bit can rise when the cutter bit is drilled at a high speed, the working temperature of the polytetrafluoroethylene is-200 ℃ +350 ℃, therefore, the first outer channel seal ring 33 manufactured by the polytetrafluoroethylene has good corrosion resistance, the service time of the polytetrafluoroethylene and the rubber seal ring in drilling work can be greatly prolonged, in addition, the manufacturing cost of the first outer channel seal ring 33, the second outer channel seal ring 34 and the rubber seal ring 35 is lower than that of the common rubber seal ring 35, although the cutter bit is slightly higher than that of the common rubber seal ring 35, the cutter bit can meet the requirements of daily popularization of metal seal bearings, and the cutter bearing can be facilitated.
The cross section of the first outer channel sealing ring 33 is set to be a rectangular cross section 331, and the sealing ring can be aged slowly under the pressure state, so that the elasticity is reduced, and the sealing performance is lost, so that the sealing ring with the rectangular cross section 331 has a certain service life, the aging speed of the sealing ring with the rectangular cross section 331 is relatively slower than that of other sealing rings due to smaller pre-compression amount after the sealing ring is installed, the sealing ring with the rectangular cross section 331 has longer service life, in addition, the sealing ring is not twisted after the sealing ring is installed according to the shape characteristics of the rectangular sealing ring, the deformation amount after the pre-compression is small, and the shape is smaller when the hydraulic pressure changes, so that the section stability of the sealing ring with the rectangular cross section 331 is better.
The cross section of the second external sealing ring 34 is set as an O-shaped cross section 341, the sealing ring with the O-shaped cross section 341 has excellent sealing performance, long service life, and the dynamic pressure sealing service life is 5-10 times higher than that of a conventional rubber sealing product, which can be tens of times as long as that of a sealing base body under certain conditions, so that slurry which is not isolated by the first external sealing ring 33 can be isolated from entering a bearing, the sealing performance of the sealing mechanism 3 is further improved, the sealing ring with the O-shaped cross section 341 has high wear resistance, the sealing surface has an automatic elasticity compensation function after being worn, and the sealing mechanism also has lubricating performance.
The cross section of the rubber sealing ring 35 is set to be a special-shaped cross section 351, the inner side of the special-shaped cross section 351 is thicker than the outer side, as shown in fig. 6, the inner side of the special-shaped cross section 351 is thicker than the outer side, and a bevel angle beta can be arranged from the inner diameter to the outer diameter of the rubber sealing ring 35, so that the elasticity of the edge of the rubber sealing ring 35 is larger, the rubber sealing ring 35 can be conveniently and directly pressed into the inner channel sealing groove 32 during rotation, and the inner side of the rubber sealing ring 35 is firmly fastened on the gripper shaft 2 under the elastic action of the edge of the rubber sealing ring 35, so that the function of stabilizing the inner sealing pressure difference is achieved.
Example two
Referring to fig. 1-6, the present embodiment is substantially the same as the first embodiment, and more preferably, the connecting end of the gripper shaft 2 and the leg is provided with a bearing ball channel 21, and a steel ball 22 is installed in the bearing ball channel 21 in a rolling manner, and the arrangement of the steel ball 22 in the bearing ball channel 21 can change sliding friction into rolling friction, so that the friction force in the power transmission process is reduced in a rolling manner, the friction force is reduced, the transmission efficiency of mechanical power is improved, and the friction loss of the gripper shaft 2 is reduced, thereby improving the practicability of the device.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a two composite seal structures of roller bit bearing, includes insert cone (1) to and install carbide cutting tooth (11) on insert cone (1), insert cone (1) one side inside cover is established and is installed tooth claw axle (2), and tooth claw axle (2) one end and leg rotation are connected, its characterized in that: a sealing mechanism (3) for preventing mud from entering the bearing is arranged between the insert cone (1) and the claw shaft (2);
the sealing mechanism (3) comprises an outer channel sealing groove (31) and an inner channel sealing groove (32) which are arranged on the inner side of the insert roller cone (1), the outer channel sealing groove (31) and the inner channel sealing groove (32) are sequentially arranged in sequence from outside to inside, an outer channel sealing ring I (33) is arranged in the outer channel sealing groove (31), an outer channel sealing ring II (34) is sleeved between the outer channel sealing groove (31) and the outer channel sealing ring I (33), and a rubber sealing ring (35) is arranged in the inner channel sealing groove (32).
2. The dual composite seal structure for a roller cone drill bit bearing of claim 1 wherein: the first outer channel sealing ring (33) is made of polytetrafluoroethylene, and the second outer channel sealing ring (34) and the rubber sealing ring (35) are made of rubber.
3. The dual composite seal structure for a roller cone drill bit bearing of claim 1 wherein: the cross section of the first outer channel sealing ring (33) is set to be a rectangular cross section (331).
4. The dual composite seal structure for a roller cone drill bit bearing of claim 1 wherein: the cross section of the second outer channel sealing ring (34) is set to be an O-shaped cross section (341).
5. The dual composite seal structure for a roller cone drill bit bearing of claim 1 wherein: the cross section of the rubber sealing ring (35) is a special-shaped cross section (351), and the inner side of the special-shaped cross section (351) is thicker than the outer side.
6. The dual composite seal structure for a roller cone drill bit bearing of claim 1 wherein: the connecting end of the claw shaft (2) and the leg is provided with a bearing ball channel (21), and a steel ball (22) is arranged in the bearing ball channel (21) in a rolling way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321515541.9U CN219953242U (en) | 2023-06-14 | 2023-06-14 | Double-composite sealing structure of roller bit bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321515541.9U CN219953242U (en) | 2023-06-14 | 2023-06-14 | Double-composite sealing structure of roller bit bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219953242U true CN219953242U (en) | 2023-11-03 |
Family
ID=88539628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321515541.9U Active CN219953242U (en) | 2023-06-14 | 2023-06-14 | Double-composite sealing structure of roller bit bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219953242U (en) |
-
2023
- 2023-06-14 CN CN202321515541.9U patent/CN219953242U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204571831U (en) | A kind of helicoid hydraulic motor seal transmission shaft | |
| CN101215954A (en) | High sealing property screw drill driving-shaft assembly | |
| CN200982159Y (en) | Roller bit single-metal floating seal assembly | |
| CN219953242U (en) | Double-composite sealing structure of roller bit bearing | |
| CN202152631U (en) | Oil seal screw drilling tool transmission shaft assembly with pressure compensation function | |
| US3047344A (en) | Drilling tools for turbine drills | |
| CN101892807A (en) | Cone bit for high-speed and high-temperature drilling | |
| CN205445459U (en) | Screw rod drilling tool wear -resistant coating transmission shaft | |
| CN206329272U (en) | A kind of screw drill transmission shaft assembly | |
| CN102747962A (en) | High-sealing roller bit | |
| CN204805329U (en) | Oil -well rig carousel bearing assembly | |
| CN201786263U (en) | Roller bit adapted to high-speed and high-temperature drilling | |
| CN102747961A (en) | Cone bit with high speed and high temperature resistances suitable for underground power drill tool | |
| CN210622806U (en) | Hob for shield machine | |
| CN202483445U (en) | Cone bit bearing sealing device | |
| CN206647050U (en) | A kind of geothermal exploration drilling well high speed tricone bit | |
| CN220434653U (en) | Hobbing cutter drill bit with metal sealing structure | |
| CN113107353B (en) | Heavy-load antifriction type sealing transmission shaft assembly | |
| CN220890200U (en) | Unbalanced high-pressure-resistant shaft hob | |
| CN115109362B (en) | Polytetrafluoroethylene rotary control head sealing element, preparation method thereof and sealing structure | |
| CN219528928U (en) | Rolling full-gauge PDC drill bit | |
| CN203879406U (en) | Screw drill lower centralizer bearing | |
| CN219974411U (en) | Reverse well hob with axial thrust | |
| CN220451770U (en) | Engineering drill bit not easy to turn around | |
| CN215861643U (en) | Heavy-duty industrial gear box speed reducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |