CN101956529B - Bearing seal of single-sealing ring cone bit - Google Patents
Bearing seal of single-sealing ring cone bit Download PDFInfo
- Publication number
- CN101956529B CN101956529B CN 201010293046 CN201010293046A CN101956529B CN 101956529 B CN101956529 B CN 101956529B CN 201010293046 CN201010293046 CN 201010293046 CN 201010293046 A CN201010293046 A CN 201010293046A CN 101956529 B CN101956529 B CN 101956529B
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- Prior art keywords
- ring
- sealing ring
- gear wheel
- cone
- tooth pawl
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Abstract
The invention discloses a bearing seal of a single-sealing ring cone bit, which comprises a cone (1), a jaw (2), an axial sealing ring (3) and a radial sealing ring (4), wherein the jaw (2) is provided with a jaw shaft (7), the cone is sleeved on the jaw shaft (7), an annular groove (8) is arranged at the root of the jaw shaft (7); an annular notch (9) is arranged at the bottom of a cone cavity (14), the sealing ring (5) is arranged in the annular notch (9), the axial sealing ring (3) and the radial sealing ring (4) are respectively arranged the upper end surface and the radial outer side of the sealing ring (5) and are in elastic contact with the annular notch (9), the sealing ring (5) rotates with the cone (1), and the lower end surface of the sealing ring (5) is in contact with and adaptive to the upper end surface of a static sealing body fixed on the annular groove. The bearing seal can improve the effective contact height and area between the cone cavity and the jaw shaft and has the advantages of little cone strength damage, low cone inner hole precision requirement, good sealing effect and simple structure.
Description
Technical field
The present invention relates to a kind of associated sealing arrangement for bearings, relate in particular to the cone bit bearing sealing device for heavy duty service.
Background technology
The roller bit sealing structure that is used at present heavy duty service mostly is the bimetallic (spring cone) seal ring structure, but bimetallic (spring cone) seal ring structure relative complex is had relatively high expectations to processing conditions.United States Patent (USP) SU4, 753, 304 and the name Chinese utility model patent CN2497035Y (patent No. ZL 01247040.6) that is called " cone bit bearing with comprehensive sealing ability " the monometallic hermetically-sealed construction is disclosed, thereby be characterized in removing a metallic packing ring and reduce the axial space that hermetically-sealed construction takies, increase the effective contact area of bearing, improve reliability, the gear wheel endoporus precision prescribed that yet the type structure is not all broken away from directly and joint ring is fitted is too high, unmanageable defective, and its static seal body basic structure is all a damascene ring that is embedded on the gear wheel inner chamber, very large to the gear wheel strength damage.As shown in Figures 1 to 4, the tooth pawl is provided with tooth pawl axle, gear wheel is sleeved on tooth pawl axle also suitable by the gear wheel inner chamber, the root of tooth pawl axle is provided with circular trough, the gear wheel intracavity bottom is provided with annular breach, at annular breach, the damascene ring is housed, the damascene ring is interference fit in annular breach, be fitted with metallic packing ring below the damascene ring, axial sealing ring is arranged in tooth pawl circular trough, axial sealing ring and metallic packing ring Elastic Contact, the radial outside of metallic packing ring is equipped with radial direction seal ring and Elastic Contact.the factors such as this body structure of gear wheel determine that it does not possess the built-up welding condition, the method that can only be equipped with the damascene ring in annular breach is improved and metallic packing ring interface strength problem, and the height of damascene ring can not be too little, otherwise have influence on stability maintenance and the result of use of damascene ring in annular breach, therefore, the use of damascene ring certainly will take height space, cause reducing effective contact height h1 of gear wheel inner chamber and tooth pawl axle, cause and the effective contact area of tooth pawl bearing occurs and dwindle, defective to gear wheel intensity injury, and above-mentioned monometallic seal ring structure relative complex, too high with the gear wheel endoporus precision prescribed that the damascene ring is fitted, processing difficulties.In addition, said structure only has the axial sealing ring primary seal, and sealing effectiveness is poor.
Summary of the invention:
The technical problem to be solved in the present invention is: for the deficiency of above-mentioned prior art existence, a kind of effective contact height and area that can improve gear wheel inner chamber and tooth pawl axle is provided, the gear wheel strength damage is little, gear wheel endoporus precision prescribed is low, good sealing effect, cone bit bearing sealing device simple in structure.
the technical scheme that the present invention will solve is: the bearing seal of single joint ring rock bit, comprise gear wheel, the tooth pawl, axial sealing ring and radial direction seal ring, the tooth pawl is provided with tooth pawl axle, gear wheel is sleeved on tooth pawl axle also suitable by the gear wheel inner chamber, the root of tooth pawl axle is provided with circular trough, the gear wheel intracavity bottom is provided with annular breach, be provided with the static seal body in circular trough, the annular breach is equipped with joint ring, axial sealing ring and radial direction seal ring lay respectively at upper surface and radial outer side and the Elastic Contact of joint ring, the lower surface of joint ring contacts with the upper surface of static seal body and is suitable.
As preferred version, described joint ring is metal ring or cermet ring.
Technique effect of the present invention is: static seal body of the present invention is positioned at tooth pawl axle root, the static seal body contacts with the joint ring of gear wheel inner chamber, such structure can improve effective contact height and the area of gear wheel inner chamber and tooth pawl axle, and the gear wheel strength damage is little, and reliability is high.Due to the upper surface of joint ring and radial outer side be equipped with respectively axial sealing ring and radial direction seal ring and with gear wheel annular breach Elastic Contact, like this gear wheel bearing is formed two-stage elastic packing, good sealing effect.Owing to only having axial sealing ring and radial direction seal ring and gear wheel annular breach Elastic Contact, and cancel the damascene ring, therefore that gear wheel of the present invention annular breach precision can require is lower, simple in structure and be conducive to reduce production costs.
Description of drawings:
In figure: 1, gear wheel, 2, the tooth pawl, 3, axial sealing ring, 4, radial direction seal ring, 5, joint ring, 6, the static seal body, 7, tooth pawl axle, 8, circular trough, 9, annular breach, 10, steel ball, 11, damascene ring, 12, tooth pawl axle slot rolling, 13, the gear wheel slot rolling, 14, gear wheel inner chamber, 15, metallic packing ring.
Fig. 1 is tooth pawl axle partial cutaway schematic diagram.
Fig. 2 is that gear wheel partly cuts open schematic diagram.
Fig. 3 is that prior art gear wheel and tooth pawl axle are in conjunction with sectional view.
Fig. 4 is A section amplification view in Fig. 3.
Fig. 5 is that gear wheel of the present invention and tooth pawl axle are in conjunction with sectional view.
Fig. 6 is B section amplification view in Fig. 5.
The specific embodiment:
Describe in detail below in conjunction with drawings and Examples:
As shown in Fig. 1,2,5 and 6, the bearing seal of the single joint ring rock bit of the present invention, comprise gear wheel 1, tooth pawl 2, axial sealing ring 3 and radial direction seal ring 4, tooth pawl 2 is provided with tooth pawl axle 7, gear wheel inner chamber 14 is sleeved on tooth pawl axle 7 also suitable, between gear wheel 1 and tooth pawl axle 7, steel ball 10 is housed, the periphery of gear wheel inner chamber 14, tooth pawl axle 7 outer circumference surfaces and steel ball 10 form the bearing combinations, and steel ball 10 gear wheel 1 under the restriction of tooth pawl axle slot rolling 12, gear wheel slot rolling 13 can rotate and keep gear wheel 1 relative tooth pawl axle 7 axial restraints around tooth pawl axle 7 simultaneously.The root car of tooth pawl axle 7 goes out circular trough 8, and gear wheel inner chamber 14 bottom cars go out annular breach 9, forms static seal body 6 by build-up welding alloy material in circular trough 8, and surfacing welding can adopt the Co119 welding rod, perhaps inlays independently static seal body 6 by interference fit.Annular breach 9 is equipped with joint ring 5, and axial sealing ring 3 and radial direction seal ring 4 lay respectively at upper surface and radial outer side and the Elastic Contact of joint ring 5, and axial sealing ring 3 and radial direction seal ring 4 adopt the nitrile rubber material.Axial sealing ring 3 and radial direction seal ring 4 require to guarantee to provide the sealing load of 10KG～15KG.The lower surface of joint ring 5 contacts with the upper surface of static seal body 6 and is suitable, and static seal body 6 grinds with the contact surface of joint ring 5, polishing, and the present embodiment fineness reaches HRA0.1.The cross section of joint ring 5 is trapezoidal, and the present embodiment axial sealing ring 3 cross sections are rectangle, and radial direction seal ring 4 is O-ring seals.Independently static seal body 6 and joint ring 5 are metal ring or cermet ring, and metal ring adopts the 9Cr18Mo material at present.It is high that the cermet ring has intensity, the characteristics that hardness is large, oxidation resistance is strong.The upper surface of static seal body 6 forms the static seal face, the lower surface of joint ring 5 forms movable sealing face, under the effect of axial sealing ring 3, radial direction seal ring 4 elasticity pretightning forces, make joint ring 5 and static seal body 6 form the end face movable sealing, in use namely, static seal body 6 and tooth pawl axle 7 fixed statics, axial sealing ring 3, radial direction seal ring 4 and joint ring 5 rotate jointly with gear wheel 1.Because the outer radius of joint ring 5 has appropriate inclined-plane, radial direction seal ring 4 is placed on the radial outer side of joint ring 5, in order to ensure the stable of joint ring 5 and to provide the part pretightning force for the end face movable sealing, radial direction seal ring 4 forms the effect of one-level static seal simultaneously, prevents that silt from entering the damage that bearing region causes bearing.Axial sealing ring 3 is placed on the upper surface of joint ring 5, relies on the pretightning force of axial sealing ring 3 to provide pretightning force for the end face movable sealing, forms the end face movable sealing, and axial sealing ring 3 forms the effect of secondary static seal simultaneously.Therefore, the present invention adopts the two-stage sealing, good airproof performance, and also the axial space that this hermetically-sealed construction takies is little, has increased the effective contact height h2 of bearing, has improved the security reliability of bearing and has obtained good processing technology.Repack with grease in the space of axial sealing ring 3, radial direction seal ring 4 and joint ring 5 is as molybdenum disulphide grease.
Those skilled in the art can obtain to inspire from the present embodiment and prior art, are out of shape to obtain other embodiment.Therefore, protection scope of the present invention should be determined according to the protection domain of claim.
Claims (1)
1. the bearing seal of single joint ring rock bit, comprise gear wheel (1), tooth pawl (2), axial sealing ring (3) and radial direction seal ring (4), tooth pawl (2) is provided with tooth pawl axle (7), it is upper and suitable that gear wheel (1) is sleeved on tooth pawl axle (7) by gear wheel inner chamber (14), the root of tooth pawl axle (7) is provided with circular trough (8), gear wheel inner chamber (14) bottom is provided with annular breach (9), it is characterized in that: joint ring (5) is contained in annular breach (9), axial sealing ring (3) and radial direction seal ring (4) lay respectively at the upper surface of joint ring (5) and radial outer side and with annular breach (9) Elastic Contact, joint ring (5) rotates with gear wheel (1), the lower surface of joint ring (5) contacts with the upper surface of static seal body (6) on being fixed on circular trough (8) and is suitable, joint ring (5) is metal ring or cermet ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010293046 CN101956529B (en) | 2010-09-17 | 2010-09-17 | Bearing seal of single-sealing ring cone bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010293046 CN101956529B (en) | 2010-09-17 | 2010-09-17 | Bearing seal of single-sealing ring cone bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101956529A CN101956529A (en) | 2011-01-26 |
| CN101956529B true CN101956529B (en) | 2013-06-05 |
Family
ID=43484096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010293046 Expired - Fee Related CN101956529B (en) | 2010-09-17 | 2010-09-17 | Bearing seal of single-sealing ring cone bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101956529B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704849A (en) * | 2012-01-17 | 2012-10-03 | 苏州新锐工程工具有限公司 | Double seal structure of mining drill bit |
| CN103556949B (en) * | 2013-10-31 | 2015-11-11 | 李生 | A kind of gear wheel bearing seal structure |
| CN110359848A (en) * | 2018-04-03 | 2019-10-22 | 西南石油大学 | Rock bit cone-shaped seal structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2497035Y (en) * | 2001-09-14 | 2002-06-26 | 曲在长 | Tri-cone rotary drill bit hearing with comprehensive sealing capacity |
| GB2422390A (en) * | 2004-08-16 | 2006-07-26 | Smith International | A drill bit, a seal assembly and a method of sealing |
| CN201297132Y (en) * | 2008-12-05 | 2009-08-26 | 西南石油大学 | A novel sealing system of high speed roller bit bearing |
| CN101663459A (en) * | 2007-04-17 | 2010-03-03 | 贝克休斯公司 | Elastomer material for high temperature roller cone bits |
| CN201428382Y (en) * | 2009-03-27 | 2010-03-24 | 江汉石油钻头股份有限公司 | Magnetic type metallic seal device for rock bit |
| EP2222933A2 (en) * | 2007-11-21 | 2010-09-01 | Baker Hughes Incorporated | Roller cone bit bearing with elastomeric seal having self break-in property |
| CN201771428U (en) * | 2010-09-17 | 2011-03-23 | 烟台瑞邦石油钻头有限公司 | Bearing sealing for roller bit with single-sealing ring |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060243494A1 (en) * | 2005-04-28 | 2006-11-02 | Baker Hughes Incorporated | Earth boring bit lubricant chamber barrier member with dispersed fibers |
| US7267186B2 (en) * | 2005-08-26 | 2007-09-11 | Baker Hughes Incorporated | Magnetic face seal for rock drill bit bearings |
-
2010
- 2010-09-17 CN CN 201010293046 patent/CN101956529B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2497035Y (en) * | 2001-09-14 | 2002-06-26 | 曲在长 | Tri-cone rotary drill bit hearing with comprehensive sealing capacity |
| GB2422390A (en) * | 2004-08-16 | 2006-07-26 | Smith International | A drill bit, a seal assembly and a method of sealing |
| CN101663459A (en) * | 2007-04-17 | 2010-03-03 | 贝克休斯公司 | Elastomer material for high temperature roller cone bits |
| EP2222933A2 (en) * | 2007-11-21 | 2010-09-01 | Baker Hughes Incorporated | Roller cone bit bearing with elastomeric seal having self break-in property |
| CN201297132Y (en) * | 2008-12-05 | 2009-08-26 | 西南石油大学 | A novel sealing system of high speed roller bit bearing |
| CN201428382Y (en) * | 2009-03-27 | 2010-03-24 | 江汉石油钻头股份有限公司 | Magnetic type metallic seal device for rock bit |
| CN201771428U (en) * | 2010-09-17 | 2011-03-23 | 烟台瑞邦石油钻头有限公司 | Bearing sealing for roller bit with single-sealing ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101956529A (en) | 2011-01-26 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Yulong Inventor after: Wei Xianping Inventor after: Xu Weijie Inventor before: Qu Zaichang Inventor before: Xu Weijie Inventor before: Liang Xiangyang Inventor before: Cao Chengbao |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20160917 |
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| CF01 | Termination of patent right due to non-payment of annual fee |