CN201110131Y - Bearing sealing structure for roller bit - Google Patents
Bearing sealing structure for roller bit Download PDFInfo
- Publication number
- CN201110131Y CN201110131Y CNU2007200890530U CN200720089053U CN201110131Y CN 201110131 Y CN201110131 Y CN 201110131Y CN U2007200890530 U CNU2007200890530 U CN U2007200890530U CN 200720089053 U CN200720089053 U CN 200720089053U CN 201110131 Y CN201110131 Y CN 201110131Y
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- sealing ring
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- metal spring
- sealing
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Abstract
The utility model relates to a bearing seal structure of a cone drill bit for oil and geology well drilling, which comprises a cone and a tooth palm, wherein the cone is sleeved with a shaft neck of the tooth palm through an inner hole to form a cone drill bit bearing, the root of the shaft neck of the tooth palm on the upper end of the bearing is provided with a metal end face sealing ring which is matched with the end face of the inner hole of the cone, the upper end of the metal end face sealing ring is allocated with a sealing ring. The utility model is characterized in that the sealing ring is a pawl-type cross-section metal spring sealing ring. The bearing seal structure adopts a metal spring and the sealing ring which is combined by heat-proof high polymer material, and temperature resistance of sealing is improved, and the drilling head can be used in deeper well and environment with higher temperature. The sealing capacity of the sealing ring is better controlled, the abrasion of sealing face is reduced, and reliability and service span are improved, metal spring dynamic property of the sealing ring has little variation as the changing of time, therefore, the bearing seal structure has longer shelf life, thereby improving the reliability of bearing seal. The structure of the shaft neck of the utility model is simplified, and the processing manufacturability is better.
Description
Technical field
The utility model relates to the bearing seal structure of a kind of oil, geological drilling usefulness rock bit, also can be used for the bearing seal of other similar component.
Background technology
For the sealing of its bearing of sealing performance of improving rock bit can be adopted shape metallic leak-proof structure, as U.S. Pat 4,753, the 304 a kind of monometallic hermetically-sealed constructions that propose, this hermetically-sealed construction includes metallic packing ring, gear wheel edge cover and O type rubber seal, and that the characteristics of this patent are that the metal end surface seal structure axially takes up room is little, reliability is high.U.S. Pat 6,026,917 have proposed a kind of monometallic hermetically-sealed construction with seal protection pad, and the seal protection pad can prevent that landwaste from entering seal area, and this patent is to US4, and 753,304 further improvement is perfect.Rock bit adopts above-mentioned this shape metallic leak-proof structure can adapt to high pressure and higher temperature environment, and O type rubber ring also provides axial elastic force that metal o-ring is carried out pretension except that playing the static seal effect in this structure.Yet rubber is high molecular polymer, and its mechanical property wants big many to the degree of dependence of temperature and time, changes the change that rubber has certain permanent deformation and mechanical property with temperature and time.As 150 ℃ of used elastomeric material heatproofs, although the temperature that the higher back of downhole temperature metallic seal friction pair can Nai Genggao, owing to provide the rubber of pretension energy storage and static seal to bear, Zheng Ti hermetically-sealed construction can't use under the higher temperature condition like this.Viscoplasticity is a key character of high polymer material mechanical property, and rubber stress-strain diagram in loading procedure and uninstall process does not overlap.Because these characteristics, seal reliable during for assurance gear wheel play in the uninstall process, designing this shape metallic leak-proof structure needs O type rubber seal that bigger elasticity pretension energy storage is provided, and the seal face specific pressure is big when normally creeping into like this, thereby the sealing friction pair wearing and tearing have influenced sealing life greatly.Simultaneously in this case, rock bit is stored also for a long time can influence the rubber parts performance, thus the reliability of influence sealing.
Summary of the invention
Technical problem to be solved in the utility model is the deficiency that exists at above-mentioned prior art and the bearing sealing structure for rotary drill bit that a kind of heat resistance is good, sealing reliability is high is provided.
The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: include gear wheel 3 and bit leg 1, gear wheel socket-connects by endoporus and bit leg journel 2, constitute cone bit bearing, root at the upper end of bearing bit leg journel is installed on hole end surface phase configuration in metal end face sealing ring 8 and the gear wheel, upper end at the metal end face sealing ring disposes sealing ring, and its difference is that described sealing ring is a pawl formula cross section metal spring sealing ring 9.
Press such scheme, described pawl formula cross section metal spring sealing ring 9 is made of the belt sealing ring 11 built-in belt metal springs 10 in the inside pawl formula cross section of opening.
Press such scheme, the cross section of the belt sealing ring 11 in described pawl formula cross section is a V-arrangement, and the cross section of the metal spring 10 that goes in ring also is a V-arrangement.
Press such scheme, the cross section of the belt sealing ring 11 in described pawl formula cross section is a U-shaped, and the cross section of the metal spring 10 that goes in ring is U-shaped or O shape.
Press such scheme, the belt sealing ring 11 in described pawl formula cross section is made by the heatproof high molecule material.
The utility model is compared with existing bearing sealing structure for rotary drill bit, has following beneficial effect:
1, adopt the sealing ring of metal spring and heatproof high molecule combination of materials, improved the temperature tolerance of sealing, drill bit can more use under deep-well and the higher temperature environment.
2, adopt the metal spring energy storage, mechanical property is better, sealing force can be controlled preferably, because power is fast with the change in displacement response speed in the play process, the end face seal power of design can be littler than the end face seal power of existing O shape rubber energy supply circle, reduce sealing surface wear, improve the reliability and the life-span of sealing.
3, the performance of rubber energy supply circle changes greatly in time, and that the metal spring mechanical property changes in time is little, thus longer storage period, arranged, thus improved the reliability of bearing seal.
4, axle journal has complicated groove in the existing relatively hermetically-sealed construction, and journal structure of the present utility model is simplified, and processing technology is better.
Description of drawings:
Fig. 1 is the rock bit part sectioned view of an embodiment of the utility model.
Fig. 2 is the local amplification profile in cone bit bearing sealing position among embodiment of the utility model.
Fig. 3 is the local amplification profile in cone bit bearing sealing position among second embodiment of the utility model.
Fig. 4 is the local amplification profile in cone bit bearing sealing position among the 3rd embodiment of the utility model.
Fig. 5 is the local amplification profile in cone bit bearing sealing position among the 4th embodiment of the utility model.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
First embodiment as shown in Figure 1, 2, include gear wheel 3 and bit leg 1, gear wheel socket-connects by endoporus and bit leg journel 2, constitute cone bit bearing, steel ball 4 after putting into bearing from the plug pin hole is fixed plug pin 6 welding, by steel ball 4 gear wheel 3 is remained on the bit leg journel 2, lubricating grease hole 5 provides lubricating grease to bit bearing.The gear wheel endoporus is equipped with edge cover 7, edge is applied mechanically high-abrasive material and is made, as stainless steel, carbide alloy etc., the edge cover adopts interference fit to be fixed in the endoporus of gear wheel 3, the endoporus and axle journal 2 phase configuration of edge cover 7 constitute sliding bearing, root at the upper end of bearing bit leg journel is installed on metal end face sealing ring 8 and gear wheel endoporus edge cover 7 end face phase configuration, form the movable sealing of metal end face, periphery upper end at the metal end face sealing ring has the outward flange that extends upward a segment distance, make the L-shaped or b shape in metal end face movable sealing cross section, dispose pawl formula cross section metal spring sealing ring 9 in the outward flange, the metal spring sealing ring is compressed between joint ring 8 and the bit leg journel 2 root end faces, described pawl formula cross section metal spring sealing ring 9 is made of the belt sealing ring 11 built-in belt metal springs 10 in the inside pawl formula cross section of opening, the cross section of the belt sealing ring 11 in pawl formula cross section is a V-arrangement, and the cross section of the metal spring 10 that goes in ring also is a V-arrangement.The belt sealing ring 11 in described pawl formula cross section is made by the heatproof high molecule material, fills PTFE and elastomeric materials such as fluorubber and silicon rubber as PTFE, modified ptfe, polymer; The metal spring 10 that goes in ring can be folded to form by metal tape, also can be whole V-ring band, for adjusting the mechanical characteristic of spring, can have the groove of different in width on the V-arrangement endless metal belt; The belt sealing ring in pawl formula cross section can combine with belt metal spring and be integral.Metal spring sealing ring pressurized is close to metal end face sealing ring 8 and bit leg journel forms static seal, and the end face movable sealing for the metal end face sealing ring simultaneously provides pretightning force, thereby guarantees sealing reliability and prolong sealing life.
Second embodiment of the utility model is that with the difference of a last embodiment the go in ring cross section of sealing ring 11, pawl formula cross section is a U-shaped as shown in Figure 3, and the cross section of the metal spring 10 that goes in ring also is a U-shaped.On the U-shaped endless metal belt, can have the groove of different in width.
The 3rd embodiment of the utility model as shown in Figure 4, be that with the difference of second embodiment belt metal spring 10 is made of spiral O shape metal spring, the spiral metal spring can be formed by circular metal silk helically coiling, also can be formed by the metal tape coiling.
The 4th embodiment of the utility model as shown in Figure 5, it is spiral O shape metal spring that the metal spring 10 that goes in ring adopts, and is that with the difference of the 3rd embodiment metal spring sealing ring compression direction is vertical with the seal face of metal end face sealing ring 8.
Claims (8)
1, a kind of bearing sealing structure for rotary drill bit, include gear wheel (3) and bit leg (1), gear wheel socket-connects by endoporus and bit leg journel (2), constitute cone bit bearing, root at the upper end of bearing bit leg journel is installed on hole end surface phase configuration in metal end face sealing ring (8) and the gear wheel, upper end at the metal end face sealing ring disposes sealing ring, it is characterized in that described sealing ring is a pawl formula cross section metal spring sealing ring (9).
2,, it is characterized in that described pawl formula cross section metal spring sealing ring (9) is made of the belt built-in belt metal spring of sealing ring (11) (10) in the inside pawl formula cross section of opening by the described bearing sealing structure for rotary drill bit of claim 1.
3, by the described bearing sealing structure for rotary drill bit of claim 2, it is characterized in that the cross section of the belt sealing ring (11) in described pawl formula cross section is a V-arrangement, the cross section of the metal spring (10) that goes in ring also is a V-arrangement.
4, by the described bearing sealing structure for rotary drill bit of claim 2, it is characterized in that the cross section of the belt sealing ring (11) in described pawl formula cross section is a U-shaped, the cross section of the metal spring (10) that goes in ring is U-shaped or O shape.
5,, it is characterized in that the described pawl formula cross section sealing ring (11) that goes in ring made by the heatproof high molecule material by the described bearing sealing structure for rotary drill bit of claim 2.
6, by claim 1 or 2 described bearing sealing structure for rotary drill bit, it is characterized in that having the outward flange that extends upward a segment distance in the periphery upper end of metal end face sealing ring (8), make the L-shaped or b shape in metal end face movable sealing cross section.
7,, it is characterized in that the pawl formula cross section sealing ring (11) that goes in ring combines with belt metal spring (10) and is integral by the described bearing sealing structure for rotary drill bit of claim 2.
8, by the described bearing sealing structure for rotary drill bit of claim 4, the metal spring (10) that it is characterized in that going in ring is made of spiral O shape metal spring, and the spiral metal spring is formed by circular metal silk helically coiling, or is formed by the metal tape coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200890530U CN201110131Y (en) | 2007-12-17 | 2007-12-17 | Bearing sealing structure for roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200890530U CN201110131Y (en) | 2007-12-17 | 2007-12-17 | Bearing sealing structure for roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201110131Y true CN201110131Y (en) | 2008-09-03 |
Family
ID=39894661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200890530U Expired - Lifetime CN201110131Y (en) | 2007-12-17 | 2007-12-17 | Bearing sealing structure for roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201110131Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182756B (en) * | 2007-12-17 | 2011-05-11 | 江汉石油钻头股份有限公司 | Bearing sealing structure for rotary drill bit |
| CN105121774A (en) * | 2013-02-13 | 2015-12-02 | 维拉国际工业有限公司 | Rock bit having a pressure balanced metal faced seal |
| CN108779665A (en) * | 2016-05-20 | 2018-11-09 | 哈利伯顿能源服务公司 | Sealing element for rock bit |
-
2007
- 2007-12-17 CN CNU2007200890530U patent/CN201110131Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182756B (en) * | 2007-12-17 | 2011-05-11 | 江汉石油钻头股份有限公司 | Bearing sealing structure for rotary drill bit |
| CN105121774A (en) * | 2013-02-13 | 2015-12-02 | 维拉国际工业有限公司 | Rock bit having a pressure balanced metal faced seal |
| CN108779665A (en) * | 2016-05-20 | 2018-11-09 | 哈利伯顿能源服务公司 | Sealing element for rock bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080903 Effective date of abandoning: 20071217 |