CN105545209B - A kind of double dovetail sealing structure of rock bit - Google Patents
A kind of double dovetail sealing structure of rock bit Download PDFInfo
- Publication number
- CN105545209B CN105545209B CN201610008635.5A CN201610008635A CN105545209B CN 105545209 B CN105545209 B CN 105545209B CN 201610008635 A CN201610008635 A CN 201610008635A CN 105545209 B CN105545209 B CN 105545209B
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- CN
- China
- Prior art keywords
- sealing ring
- double dovetail
- circular arc
- dovetail sealing
- double
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
- E21B10/25—Roller bits characterised by bearing, lubrication or sealing details characterised by sealing details
Abstract
A kind of double dovetail sealing structure of rock bit of the present invention, is made up of gear wheel, bearing, double dovetail sealing ring；The double dovetail sealing ring is that two dovetail sealing rings are combined into one structure, and bottom surface is large end face, and top surface is small end face, improves self sealss performance, prevents double dovetail sealing ring to be distorted, rotate, vibrate.Axially top surface and bottom surface are raised and arc groove the combining structure of circular arc, by multiple circular arc raised seals, effectively reduce sealing area, realize multi-stage sealed, and groove is easy to storing lubricating grease.It is the symmetrical structure that inclined-plane combine with circular arc along the both sides of radially double dovetail sealing ring, reduces stress concentration, realized by multiple projections multi-stage sealed, inclined-plane is with deforming automatic compensation function.The centre of double dovetail sealing ring is two mutually isostructural holes, is made up of circular arc with inclined-plane, the gradient on inclined-plane is identical with the slope in outside, top surface is circular arc, bottom surface is plane, reduces stress concentration.
Description
Technical field
The present invention relates to a kind of double dovetail sealing structure of rock bit suitable for oil drilling, geological prospecting, belong to
Cone bit bearing field of sealing technology.
Background technology
Rock bit is most important a kind of drilling tool in drilling prospection, and using quite varied, weight is occupied in drill bit market
The position wanted.Sealing is that the part of rock bit most critical is also consumable accessory, and sealing system performance directly determines rock bit
Service life, sealing life is shorter, and failure is serious, has had a strong impact on drilling engineering.The sealed subject matter of rock bit is：
One be sealing ring contact area it is larger, the high temperature in shaft bottom in addition so that frictional force and frictional heat will be sharply increased, and be accelerated
The senile abrasion of sealing ring.Two be that annular seal space is small, and difficult to realize multi-stage sealed, single-stage sealing reliability is poor.Three be that metal is floated
Automatic compensation function can not be realized after the metal sealing surface wear of dynamic sealing, it is impossible to ensure effectively sealing.
The content of the invention
The invention aims to solve the deficiency of existing roller bit sealing structure, it is double that spy provides a kind of rock bit
Arrange dovetail sealing structure.
The technical solution adopted for the present invention to solve the technical problems is：A kind of double dovetail sealing of rock bit of the present invention
Structure, is made up of gear wheel, bearing, double dovetail sealing ring；The double dovetail sealing ring is that two dovetail sealing rings are combined as
Integrative-structure, the bottom surface of double dovetail sealing ring is large end face, and the top surface of double dovetail sealing ring is small end face, is improved from close
Sealing property, adds sealed stability, prevents double dovetail sealing ring to be distorted, rotate, reduces vibration.Axially
The top surface of double dovetail sealing ring and bottom surface are raised and arc groove the combining structure of circular arc, close by multiple circular arc projections
Envelope, effectively reduces sealing area, realizes multi-stage sealed, and arc groove is easy to storing lubricating grease.Along radially double dovetail
The both sides of sealing ring are inclined-plane and the symmetrical structure of circular arc combination of protrusions, reduce stress concentration, reduce the destruction of sealing ring,
Realized by multiple circular arc projections it is multi-stage sealed, inclined-plane have deformation automatic compensation function.The centre of double dovetail sealing ring (6)
For two mutually isostructural holes, hole is made up of circular arc, prism and bottom surface, the gradient of the prism in hole and double dovetail sealing ring
(6) slope of both sides is identical, and the top surface in hole is circular arc, and the bottom surface in hole is plane, effectively reduces stress concentration.
It is an advantage of the invention that：1st, the bottom surface of the double dovetail sealing structure of rock bit is large end face, double dovetail sealing
The top surface of circle is small end face, adds sealed stability, prevents to rotate, distort, vibrate；2nd, double dovetail sealing ring is adopted
With inclined-plane and circular arc combination of protrusions, contact area is both reduced, frictional force and frictional heat is reduced, stress concentration is reduced again,
Improve sealing life；3rd, along radial and axial, by multiple circular arc raised seals of double dovetail sealing ring, realize many
Level sealing, improves sealed reliability；4th, arc groove can improve greasy property with storing lubricating grease；5th, double dovetail
Sealing ring cross-section is symmetrical structure, in the presence of pressure at both sides, is deformed more uniform；5th, the double dovetail sealing knot of rock bit
Structure has deformation automatic compensation function.
Brief description of the drawings
Fig. 1 is a kind of double dovetail sealing structure of rock bit of the invention.
Fig. 2 is the enlarged drawing of structure at Figure 1A.
In figure：1. tooth pawl, 2. gear wheels, 3. steel balls, 4. plug pins, 5. bearings, 6. double dovetail sealing rings.
Embodiment
The invention will be further described in conjunction with the accompanying drawings and embodiments in face.
As shown in Figure 1：Tooth pawl 1 and gear wheel 2 are socketed on bearing 5 by gear wheel endoporus respectively, and steel ball 3 is put into from plug pin hole
Plug pin 4 is welded and fixed after bearing, gear wheel 2 is maintained on bearing 5 by steel ball 3.It is equipped between the endoporus of gear wheel 2 and bearing 5
Double dovetail sealing ring 6.
As shown in Figure 1, 2, the double dovetail sealing structure of a kind of rock bit of the invention, by gear wheel 2, bearing 5, double dovetail
Sealing ring 6 is constituted；The double dovetail sealing ring 6 is that two dovetail sealing rings are combined into one structure, double dovetail sealing ring 6
Bottom surface be large end face, the top surface of double dovetail sealing ring 6 is small end face, improves self sealss performance, is added sealedly steady
It is qualitative, prevent double dovetail sealing ring 6 to be distorted, rotate, vibrate.The axially top surface of double dovetail sealing ring 6 and bottom
Face is raised and arc groove the combining structure of circular arc, by multiple circular arc raised seals, effectively reduces sealing area, real
Show multi-stage sealed, arc groove is easy to storing lubricating grease.It is inclined-plane and circular arc along the both sides of radially double dovetail sealing ring 6
The symmetrical structure of combination of protrusions, reduces stress concentration, reduces the destruction of sealing ring, is realized by multiple circular arcs projection multistage
Sealing, inclined-plane has deformation automatic compensation function.The centre of double dovetail sealing ring (6) is two mutually isostructural holes, Kong You
Circular arc, prism and bottom surface composition, the gradient of the prism in hole and the slope phase of the both sides of double dovetail sealing ring (6)
Together, the top surface in hole is circular arc, and the bottom surface in hole is plane, effectively reduces stress concentration.
Claims (1)
1. a kind of double dovetail sealing structure of rock bit, is made up of gear wheel (2), bearing (5), double dovetail sealing ring (6), double
Dovetail sealing ring (6) is arranged to be located in the annular seal space that gear wheel (2) is constituted with bearing (5), it is characterised in that：The double dovetail sealing
Circle (6) is that two dovetail sealing rings are combined into one structure, and the bottom surface of double dovetail sealing ring (6) is large end face, double dovetail
The top surface of sealing ring (6) is small end face, improves self sealss performance, prevent double dovetail sealing ring (6) be distorted, rotate,
Vibration；Axially the top surface of double dovetail sealing ring (6) and bottom surface are raised and arc groove the combining structure of circular arc, are led to
Multiple circular arc raised seals are crossed, sealing area is effectively reduced, realize multi-stage sealed, arc groove is easy to storing lubricating grease；
It is inclined-plane and the symmetrical structure of circular arc combination of protrusions along the both sides of radially double dovetail sealing ring (6), reduces stress concentration,
Reduce the destruction of sealing ring, realized by multiple circular arc projections it is multi-stage sealed, inclined-plane have deformation automatic compensation function；It is double
The centre of dovetail sealing ring (6) is two mutually isostructural holes, and hole is made up of circular arc, prism and bottom surface, the prism in hole
Gradient is identical with the slope of the both sides of double dovetail sealing ring (6), and the top surface in hole is circular arc, and the bottom surface in hole is plane, is had
Effect reduces stress concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008635.5A CN105545209B (en) | 2016-01-08 | 2016-01-08 | A kind of double dovetail sealing structure of rock bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008635.5A CN105545209B (en) | 2016-01-08 | 2016-01-08 | A kind of double dovetail sealing structure of rock bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105545209A CN105545209A (en) | 2016-05-04 |
| CN105545209B true CN105545209B (en) | 2017-09-12 |
Family
ID=55824714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610008635.5A Active CN105545209B (en) | 2016-01-08 | 2016-01-08 | A kind of double dovetail sealing structure of rock bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105545209B (en) |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3656764A (en) * | 1970-08-31 | 1972-04-18 | William P Robinson | Drill bit seal assembly |
| US3944306A (en) * | 1974-12-16 | 1976-03-16 | Smith International, Inc. | Rock bit bearing seal |
| US4176848A (en) * | 1978-06-30 | 1979-12-04 | Dresser Industries, Inc. | Rotary bearing seal for drill bits |
| US4294492A (en) * | 1979-11-19 | 1981-10-13 | Evans Robert F | Caliper seal assembly |
| US4344629A (en) * | 1980-10-14 | 1982-08-17 | Smith International, Inc. | Self-lapping high speed seal with wear-in lip |
| US4466621A (en) * | 1982-11-29 | 1984-08-21 | Rock Bit Industries U.S.A., Inc. | Rotary drill bit multiple seal assembly |
| US4776599A (en) * | 1987-10-19 | 1988-10-11 | Edward Vezirian | Dynamic packing ring seal system |
| US6536542B1 (en) * | 1999-10-28 | 2003-03-25 | Smith International, Inc. | Rock bit seal with multiple dynamic seal surface elements |
| US6837317B2 (en) * | 2001-11-16 | 2005-01-04 | Varel International, Ltd. | Bearing seal |
| US7036613B2 (en) * | 2003-09-12 | 2006-05-02 | Reedhycalog, L.P. | Lip seal for roller cone drill bit |
| US7347290B2 (en) * | 2004-06-15 | 2008-03-25 | Smith International, Inc. | Multi-part energizer for mechanical seal assembly |
| CN101501292A (en) * | 2006-08-14 | 2009-08-05 | 贝克休斯公司 | Stabilized seal for rock bits |
| CN201297132Y (en) * | 2008-12-05 | 2009-08-26 | 西南石油大学 | A novel sealing system of high speed roller bit bearing |
| US20100147595A1 (en) * | 2008-12-12 | 2010-06-17 | Baker Hughes Incorporated | Bearing seal with improved contact width |
| RU2452843C1 (en) * | 2010-12-29 | 2012-06-10 | Николай Митрофанович Панин | Support of rolling cutter drilling tool |
| CN102704850A (en) * | 2012-01-17 | 2012-10-03 | 苏州新锐工程工具有限公司 | Double-sealed structure for mining drill |
| CN102587835A (en) * | 2012-03-30 | 2012-07-18 | 幸发芬 | Double sealing system for roller bit bearings |
| WO2013149358A1 (en) * | 2012-04-01 | 2013-10-10 | Xing Fafen | Spring accumulator bearing twin sealing rings for roller cone bit |
| CN102797420A (en) * | 2012-08-29 | 2012-11-28 | 上海神开石油化工装备股份有限公司 | Bidirectional integrated spring energy storage sealed roller bit |
| CN104948114B (en) * | 2015-07-22 | 2018-01-02 | 江汉石油钻头股份有限公司 | A kind of sealing ring with lubrication channel |
| CN105134083B (en) * | 2015-09-24 | 2017-07-28 | 西南石油大学 | A kind of high speed rock bit bearing spiral combined sealing structure |
-
2016
- 2016-01-08 CN CN201610008635.5A patent/CN105545209B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105545209A (en) | 2016-05-04 |
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