CN2809185Y - Sealing bearing structure of roller bit - Google Patents
Sealing bearing structure of roller bit Download PDFInfo
- Publication number
- CN2809185Y CN2809185Y CN 200520096830 CN200520096830U CN2809185Y CN 2809185 Y CN2809185 Y CN 2809185Y CN 200520096830 CN200520096830 CN 200520096830 CN 200520096830 U CN200520096830 U CN 200520096830U CN 2809185 Y CN2809185 Y CN 2809185Y
- Authority
- CN
- China
- Prior art keywords
- sealed bearing
- bearing structure
- bit
- sealing bearing
- rock bit
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a roller bit for the field of rock drilling and petroleum drilling, particularly a sealing bearing structure of a roller bit. The utility model comprises a roller cone and a cone leg, wherein the cone leg is matched with an inner hole of the roller cone by a shaft neck at the lower end to form a rubbing pair of a sealing bearing. The utility model is characterized in that granular light pits are arranged on the surface of the rubbing pair of the sealing bearing. The depth of the granular light pits is 0.02 to 0.3 mm. The surface of the rubbing pair is the surface of the shaft neck and/or the inner hole of the roller cone. The utility model has the advantage that as the granular light pits are arranged on the surface of the rubbing pair of the sealing bearing of the roller bit, when the roller bit works, lubricant from a lubricating compensation system of the roller bit is complemented endlessly to the granular light pits; the granular light pits can enhance the oil storage ability of the surface of the rubbing pair and enhance the generation conditions of oil films. Thus, the lubricated conditions of the rubbing pair are improved, abrasions are reduced, so the anti-biting performance of the sealing bearing structure of a roller bit is enhanced, and the useful service life of the sealing bearing structure of a roller bit is improved.
Description
Technical field
The utility model relates to a kind of rock bit that is used for rock drilling and field of oil drilling, is specifically related to the sealed bearing structure of rock bit.
Background technology
Widely used rock bit mainly is made up of bit leg and gear wheel in the oil and natural gas drilling well at present, offers endoporus usually on gear wheel, and the lower end on bit leg is provided with axle journal, and the part of both phase configuration is the cone bit bearing pair.Because the particularity that rock bit is used, cone bit bearing has non-exchange property.Rock bit in the course of the work, gear wheel rotates around bit leg journel.Pressing the supplementary form of sliding agent distinguishes, rock bit has two kinds of forms usually: a kind of is the rock bit with sliding agent bucking-out system, another kind is the rock bit that does not have the sliding agent bucking-out system, and its corresponding bearing is called sealed bearing and open-type bearing.The rock bit sealed bearing can be divided into three types again according to structure: a kind of is slide construction, and promptly the gear wheel endoporus directly contacts with bit leg journel or be provided with liner between both axial contact surfaces; Second kind is the rolling sliding bearing, promptly radially is provided with rolling element between gear wheel endoporus and the bit leg journel, both axial contact surfaces directly contact or between be provided with liner; The third is a bushing bearing, promptly gear wheel endoporus and bit leg journel radially between be provided with lining and/or between both axial contact surfaces, be provided with liner.Because rock bit is to work under the condition of top load, thump, and its cooling and poor lubrication and have non-exchange property, therefore, even adopt sealed bearing, usually all in 100 hours, the highest also is no more than 300 hours to the bearing life of rock bit.And improve its lubricating condition, the bite-resistant ability that reduces wear, improve the sealed bearing friction pair is one of key factor that improves the cone bit bearing life-span.
Summary of the invention
Technical problem to be solved in the utility model is the sealed bearing structure that a kind of improved rock bit is provided at the deficiency of above-mentioned prior art existence, it can improve bearing lubrication, reduce wear, improve its bite-resistant performance, thereby improve the Acceptable life of rock bit.
The utility model is that the technical scheme that technical problem adopted of the above-mentioned proposition of solution is: comprise gear wheel and bit leg, bit leg forms the sealed bearing friction pair by the axle journal and the gear wheel endoporus phase configuration of its lower end, and its difference is that the sealed bearing surface of friction pair is provided with granular shallow table pit.
Press such scheme, described shallow table pit depth is 0.02～0.3 millimeter; The shape of shallow table pit can be circle, ellipse, rectangle, polygon, triangle or irregular shape, the combination of above-mentioned one or more shapes; Described surface of friction pair is axle journal and/or gear wheel bore area.
Press such scheme, described shallow table pit can be laid in the part surface of sealed bearing friction pair, also can be laid in all surfaces of sealed bearing friction pair.The surface area of shallow table pit can be 5～50 square millimeters.
The beneficial effects of the utility model are to be provided with pit by the surface of friction pair at cone bit bearing, when rock bit is worked, lubricate the sliding agent of bucking-out system constantly to the agent of pit supplemental lubrication from rock bit, pit can strengthen the oil storage capacity of surface of friction pair and strengthen the formation condition of oil film, improve the lubricating condition of friction pair, reduce wear, the bite-resistant performance of rock bit bearing is enhanced, thereby improve the Acceptable life of journal bearing bit.
Description of drawings
Fig. 1 is gear wheel, the bit leg structure chart of an embodiment of the utility model.
Fig. 2 is gear wheel sectional view among embodiment of the utility model.
Fig. 3 is the expanded view of surface of friction pair among embodiment of the utility model.
Fig. 4 is the A-A sectional view of Fig. 3.
The expanded view of another kind of surface of friction pair among embodiment of Fig. 5 the utility model.
The expanded view of the third surface of friction pair among embodiment of Fig. 6 the utility model.
The expanded view of the 4th kind of surface of friction pair among embodiment of Fig. 7 the utility model.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing, include bit leg 1 and gear wheel 2, gear wheel is by the axle journal phase configuration of its endoporus and bit leg lower end, and by locking mechanism 5 lockings, be provided with sealing ring 6 and axle journal phase configuration in the rear end of gear wheel endoporus, constitute rock bit sealed bearing friction pair; One of surface of bearing friction pair gear wheel bore area is provided with circular granular shallow table pit 7, can use the mark machine, the electricity consumption caustic solution processes a plurality of shallow table pits on the endoporus of cone body, the diameter phi of circular shallow table pit is 3～5 millimeters, the degree of depth is 0.06 millimeter, the bearing friction secondary surface that is covered with the gear wheel endoporus, each row's (row) shallow table pit interleaved is laid.
The shape of above-mentioned shallow table pit also can be ellipse, or triangle, or ellipse and the staggered layout at interval of each row of triangle.Above-mentioned shallow table pit also can be arranged on the journal surface of bearing friction pair; Also can on the axial contact surface 3 of gear wheel endoporus and bit leg journel, shallow table pit 7 be set one or both sides.Can be provided with liner between this axial contact surface, can on the upper surface of liner and/or soffit, shallow table pit 7 be set.
Claims (8)
1, a kind of sealed bearing structure of rock bit comprises gear wheel and bit leg, and bit leg forms the sealed bearing friction pair by the axle journal and the gear wheel endoporus phase configuration of its lower end, it is characterized in that the sealed bearing surface of friction pair is provided with granular shallow table pit.
2, by the sealed bearing structure of the described rock bit of claim 1, it is characterized in that described shallow table pit depth is 0.02～0.3 millimeter.
3, by the sealed bearing structure of claim 1 or 2 described rock bit, it is characterized in that the shape of shallow table pit can be circle, ellipse, rectangle, polygon, triangle or irregular shape, the combination of above-mentioned one or more shapes.
4, by the sealed bearing structure of claim 1 or 2 described rock bit, it is characterized in that described surface of friction pair is axle journal and/or gear wheel bore area.
5, by the sealed bearing structure of claim 1 or 2 described rock bit, it is characterized in that described shallow table pit is laid in the part surface of sealed bearing friction pair.
6, by the sealed bearing structure of claim 1 or 2 described rock bit, it is characterized in that described shallow table pit is laid in all surfaces of sealed bearing friction pair.
7, by the sealed bearing structure of the described rock bit of claim 3, the diameter that it is characterized in that circular shallow table pit is 3～5 millimeters, and the degree of depth is 0.06 millimeter.
8, by the sealed bearing structure of claim 1 or 2 described rock bit, the surface area that it is characterized in that described shallow table pit is 5～50 square millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520096830 CN2809185Y (en) | 2005-06-21 | 2005-06-21 | Sealing bearing structure of roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520096830 CN2809185Y (en) | 2005-06-21 | 2005-06-21 | Sealing bearing structure of roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2809185Y true CN2809185Y (en) | 2006-08-23 |
Family
ID=36925369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520096830 Expired - Fee Related CN2809185Y (en) | 2005-06-21 | 2005-06-21 | Sealing bearing structure of roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2809185Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102037208A (en) * | 2008-03-14 | 2011-04-27 | 威瑞尔国际工业公司 | Texturing of the bearing surface for a roller cone rock bit |
| CN102806232A (en) * | 2012-08-18 | 2012-12-05 | 芜湖市思提克新材料有限公司 | Abrasion-proof low-frictional-resistance roll journal and production process thereof |
| CN105283622A (en) * | 2013-05-03 | 2016-01-27 | 贝克休斯公司 | Drill bit with a dynamic metal seal |
| CN110359850A (en) * | 2018-04-03 | 2019-10-22 | 西南石油大学 | Rock bit novel sealing structure |
-
2005
- 2005-06-21 CN CN 200520096830 patent/CN2809185Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102037208A (en) * | 2008-03-14 | 2011-04-27 | 威瑞尔国际工业公司 | Texturing of the bearing surface for a roller cone rock bit |
| CN102037208B (en) * | 2008-03-14 | 2014-07-30 | 威瑞尔国际工业公司 | Texturing of the bearing surface for a roller cone rock bit |
| CN102806232A (en) * | 2012-08-18 | 2012-12-05 | 芜湖市思提克新材料有限公司 | Abrasion-proof low-frictional-resistance roll journal and production process thereof |
| CN105283622A (en) * | 2013-05-03 | 2016-01-27 | 贝克休斯公司 | Drill bit with a dynamic metal seal |
| CN105283622B (en) * | 2013-05-03 | 2018-02-23 | 贝克休斯公司 | Drill bit with dynamic metal seal |
| CN110359850A (en) * | 2018-04-03 | 2019-10-22 | 西南石油大学 | Rock bit novel sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060823 Termination date: 20140621 |
|
| EXPY | Termination of patent right or utility model |