CN2514108Y - Rolling bearing rock roller bit - Google Patents
Rolling bearing rock roller bit Download PDFInfo
- Publication number
- CN2514108Y CN2514108Y CN 01252294 CN01252294U CN2514108Y CN 2514108 Y CN2514108 Y CN 2514108Y CN 01252294 CN01252294 CN 01252294 CN 01252294 U CN01252294 U CN 01252294U CN 2514108 Y CN2514108 Y CN 2514108Y
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- CN
- China
- Prior art keywords
- metal
- rolling bearing
- layer
- strengthening layer
- bit
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- Expired - Lifetime
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- Earth Drilling (AREA)
Abstract
The utility model relates to a rolling bearing roller cone bit used in the field of petroleum and geological drilling, in particular to a rolling bearing roller cone bit having a metal carbonide strengthening layer on the surface of a rolling body. The utility model includes a head section and a roller cone, the rolling body is arranged at the bearing position, at which the head section and the roller cone are jointed, the difference is that the metal carbonide strengthening layer is permeatively coated on the surface of the rolling body, and a metal sulfide layer or a composite layer of metal sulfide and metal oxide is permeatively coated on the metal carbonide strengthening layer. The utility model has the advantage of that the metal carbonide strengthening layer permeatively coated on the surface of the rolling body at the bearing position of the roller bit resists the fatigue abrasion generated by the surface and subsurface of the rolling body. The metal sulfide layer or the composite layer of metal sulfide and metal oxide formed on the surface of the metal carbonide strengthening layer ensures that the surface of the rolling body has better performances of seizure resistance and fatigue resistance, which notably increases the bearing capability of a rolling bearing.
Description
Technical field
The utility model relates to the rolling bearing rock bit of a kind of oil and the use of geological drilling field, relates to the rolling bearing rock bit that a kind of rolling element surface has the metal carbides strengthening layer particularly.
Background art
Rock bit mainly is made up of gear wheel and bit leg two large divisions, and gear wheel and bit leg engage by their bearing portion, and can be relative to rotating flexibly.Between the big axis hole of gear wheel and the big axle journal of bit leg, be provided with a belt raceway, in the raceway that goes in ring rolling element be set, promptly constitute rock bit rolling bearing part.Because the low friction performance of rolling bearing makes it have more potentiality than sliding bearing at a high speed and aspect the ultrahigh speed drilling technology in adaptation, yet, reach this point, strengthen the surface strength and the hardness of rolling element in the rolling bearing, improve its anti-fatigue performance and be even more important.Carbon bearing steel such as 55SiMoV during rolling element in the existing rolling bearing rock bit mostly adopts, through Quenching Treatment, hardness is HRC55-58, its anti-fatigue performance can only be suitable for high rotating speed but use in the long operating mode application life, and is difficult to satisfy the reinforcement technique requirement of the high rotating speed of modern drilling technology, high the pressure of the drill.Studies show that the fatigue wear of rolling element mainly occurs in top layer and subsurface stratum, therefore will help to improve the anti-fatigue performance of rock bit rolling bearing by the employing surface intensified technique that hardness is higher, the degree of depth is darker.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of rolling bearing rock bit that can adapt to high rotating speed, high the pressure of the drill technological requirement at the deficiency of above-mentioned prior art existence.
For solving the technical problem of above-mentioned proposition, the technical solution of the utility model is as follows: include bit leg 2, gear wheel 1, the bearing portion that engages with bit leg at gear wheel is provided with rolling element 3, and its difference is that described rolling element surface is oozed and is covered with the metal carbides strengthening layer.
Press such scheme, described rolling element can be roller; Described metal carbides strengthening layer is the carburizing and quenching layer, is obtained by carburization process, and carburizing depth is 0.5-3.5mm; For further improving the bite-resistant performance and the anti-fatigue performance on rolling element surface, on the metal carbides strengthening layer, also can ooze and cover metal sulfide layer (mainly being FeS), perhaps ooze and cover metal sulfide (mainly being FeS) and metal oxide (Fe
2O
3) composite bed, the thickness of above-mentioned metal sulfuric horizon, or the thickness of metal sulfide and metal oxide composite bed is 0.01-0.2mm.
The beneficial effects of the utility model are to cover the metal carbides strengthening layer by oozing on rolling element surface, cone bit bearing position, and reach certain thickness, resist the fatigue wear that rolling element top layer and subsurface stratum take place.Metal carbides strengthening layer surface is formed with metal sulfide layer or metal sulfide and metal oxide composite bed again makes the rolling element surface have better bite-resistant performance and fatigue performance, and they all have good binding intensity with matrix surface, the supporting capacity of rolling bearing is significantly improved, thereby can makes rock bit adapt to the demand of the modern drilling technology of higher rotating speed, higher the pressure of the drill.
Description of drawings
Fig. 1 is the sectional structure chart of an embodiment bearing portion of the utility model.
Fig. 2 is the surface layer structure schematic diagram of the utility model rolling element.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing, include gear wheel 1 and bit leg 2, gear wheel and bit leg engage by their bearing portion, between big axis hole of gear wheel and the big axle journal 7 of bit leg, be provided with the raceway 6 that goes in ring, be installed on roller in the belt raceway as rolling element 3, be impregnated with metal carbides strengthening layer 8 in roller surface, the degree of depth is 1.5-2.0mm, outside the metal carbides strengthening layer, also ooze and be covered with metal oxide and metal sulfide composite bed 9, thickness is 0.10mm, form metal carbides and metal oxide thus, the stable composite bed of the hard change of gradient of metal sulfide, roller surface hardness is HRC64, anti-fatigue performance excellence not only, and have favorable shock resistance.The rolling element surface treatment process of present embodiment is: carburizing and quenching tempering after the roughing, be refined to given size, carry out compound ion then and ooze oxygen, sulfurizing, the matrix material of rolling element adopts bearing steel, as middle carbon bearing steel 55SiMoV, 50CrNi, and carburizing bearing steel 20Cr2Ni4 (A), 20Cr2Mn2Mo (A) etc.The joint of gear wheel, bit leg is provided with sealing ring in the present embodiment, gear wheel, bit leg are axially locked by steel ball locking element 4, sliding bearing pair is adopted at pilot pin position 5, also can adopt the rolling bearing pair, and the roller in its rolling bearing pair also can adopt surface structure of the present utility model.
Claims (7)
1, a kind of rolling bearing rock bit includes bit leg (2), gear wheel (1), and the bearing portion that engages with bit leg at gear wheel is provided with rolling element (3), it is characterized in that described rolling element surface is oozed to be covered with the metal carbides strengthening layer.
2, by the described rolling bearing rock bit of claim 1, it is characterized in that described rolling element is a roller.
3, by claim 1 or 2 described rolling bearing rock bit, it is characterized in that described metal carbides strengthening layer is the carburizing and quenching layer, carburizing depth is 0.5-3.5mm.
4, by claim 1 or 2 described rolling bearing rock bit, it is characterized in that on metal carbides strengthening layer (8), also oozing and cover the metal sulfide layer, perhaps ooze and cover metal sulfide and metal oxide composite bed (9).
5, by the described rolling bearing rock bit of claim 4, it is characterized in that the thickness of metal sulfuric horizon or the thickness of metal sulfide and metal oxide composite bed are 0.01-0.2mm.
6, by the described rolling bearing rock bit of claim 4, it is characterized in that being impregnated with the metal carbides strengthening layer in roller surface, the degree of depth is 1.5-2.0mm, also oozes to be covered with metal oxide and metal sulfide composite bed outside the metal carbides strengthening layer, and thickness is 0.10mm.
7, by claim 1 or 2 described rolling bearing rock bit, the material that it is characterized in that described rolling element matrix is a bearing steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252294 CN2514108Y (en) | 2001-10-31 | 2001-10-31 | Rolling bearing rock roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252294 CN2514108Y (en) | 2001-10-31 | 2001-10-31 | Rolling bearing rock roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2514108Y true CN2514108Y (en) | 2002-10-02 |
Family
ID=33662042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01252294 Expired - Lifetime CN2514108Y (en) | 2001-10-31 | 2001-10-31 | Rolling bearing rock roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2514108Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103805940A (en) * | 2014-01-15 | 2014-05-21 | 常州大学 | Ion oxygen-permeation method for nanocrystallization of gear steel surface and increasing of surface free energy |
| CN109854178A (en) * | 2019-03-27 | 2019-06-07 | 山东易斯特工程工具有限公司 | A kind of rotary drilling rig rolling cutter |
| CN113217532A (en) * | 2021-05-31 | 2021-08-06 | 中石化江钻石油机械有限公司 | Bearing with high bearing and high wear resistance and machining method thereof |
-
2001
- 2001-10-31 CN CN 01252294 patent/CN2514108Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103805940A (en) * | 2014-01-15 | 2014-05-21 | 常州大学 | Ion oxygen-permeation method for nanocrystallization of gear steel surface and increasing of surface free energy |
| CN109854178A (en) * | 2019-03-27 | 2019-06-07 | 山东易斯特工程工具有限公司 | A kind of rotary drilling rig rolling cutter |
| CN109854178B (en) * | 2019-03-27 | 2020-12-22 | 山东易斯特工程工具有限公司 | Roller bit for rotary drilling rig |
| CN113217532A (en) * | 2021-05-31 | 2021-08-06 | 中石化江钻石油机械有限公司 | Bearing with high bearing and high wear resistance and machining method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111031 Granted publication date: 20021002 |