CN105134083B - A kind of high speed rock bit bearing spiral combined sealing structure - Google Patents
A kind of high speed rock bit bearing spiral combined sealing structure Download PDFInfo
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- CN105134083B CN105134083B CN201510613467.8A CN201510613467A CN105134083B CN 105134083 B CN105134083 B CN 105134083B CN 201510613467 A CN201510613467 A CN 201510613467A CN 105134083 B CN105134083 B CN 105134083B
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Abstract
The present invention relates to a kind of high speed rock bit bearing spiral combined sealing structure, it is made up of gear wheel, bearing, spiral sealing ring, O-shaped rubber ring.The spiral sealing ring is arranged in the helicla flute of gear wheel endoporus, when drilling bit high-speed rotary, passes through the pump action of helicla flute, realize automatic sand draining function, O-shaped rubber ring outside pressure is added simultaneously, O-shaped rubber ring both sides pressure difference is reduced, improves the sealing effectiveness of O-shaped rubber ring；The O-shaped rubber ring is located above spiral sealing ring, is arranged on certain magnitude of interference in bearing groove, and auxiliary two-stage sealing is realized in drilling bit high-speed rotary, effective sealing function is may also function as when drill bit stops operating.The present invention has preferable sediment outflow performance, can effectively reduce bearing wear, can meet seal request during different operating modes, substantially increase sealed reliability and stability, improve sealing service life.The sealing need not increase other support components, be the space that rock bit saves preciousness.
Description
Technical field
The present invention relates to a kind of high speed rock bit bearing spiral combination sealing suitable for oil drilling, geological drilling,
Belong to cone bit bearing field of sealing technology.
Background technology
High speed is the new direction of rock bit development, and long-life high speed rock bit research has turned into world oil and bored
Well engineering important technical problem in the urgent need to address.Bearing seal is the key for determining the high speed rock bit life-span, is at a high speed
Rock bit most weak link.Failure analysis to rock bit shows, as long as a gear wheel bearing is in advance in rock bit
Damage, will be quickly invalidated whole drill bit.Field data statistical analysis shows, because bearing early damage causes the drill bit of failure
The 80% of failure drill bit sum is accounted for, and the life-span of bearing largely relies on the sealed life-span, because sealing is failed in advance
And the bearing of heavy wear accounts for the 30% of failing bearings sum.
Domestic and international Research on Seal is primarily directed to conventional roller cone drill bit, and research sealed to high speed rock bit is also seldom.
Hughes Electronics of the U.S. leads rock bit Sealing Technology always, and domestic research level obviously lags behind foreign countries.At present, it is existing
Sealing is the mode of passive seal mostly, without active sand discharge function, by passively preventing the entrance of mud abrasive particle from improving
Sealing property, once mud particle enters, infringement of the abrasion caused to sealing property can not just make up.This project will be passive close
Envelope mode is changed into active sediment outflow mode, and design helical structure can directly prevent the entrance of mud, be suitable for high speed rock bit,
Compared to passive seal mode, sealed reliability will be greatly improved.
" spiral combination sealing " is using spiral sealing ring and the new structure form of O-shaped rubber ring organic assembling.When drill bit is high
When speed is rotated, helixseal plays sediment outflow, primary seal, can significantly overcome the abrasion that solid particle is caused, and auxiliary rubber circle is real
Existing two-stage sealing, reliability is high.When rock bit stops operating, sealed using O-shaped rubber ring.Meanwhile, spiral combination sealing
With deformation automatic compensation function.
The content of the invention
The invention aims to solve sediment outflow poor performance, the mill that existing high speed rock bit bearing seal structure is present
The problem of serious, reliability is low is damaged, spy provides a kind of high speed rock bit bearing spiral combination sealing.
The technical solution adopted for the present invention to solve the technical problems is：A kind of high speed rock bit bearing spiral of the present invention
Combined sealing structure, is mainly made up of gear wheel, bearing, spiral sealing ring and O-shaped rubber ring, positioned at gear wheel and bearing constitute it is close
Seal intracavitary.The spiral sealing ring is installed in the helicla flute of gear wheel endoporus, when drilling bit high-speed rotary, passes through the pump of helicla flute
Effect is sent, automatic sand draining function is realized, effectively prevents mud particle from entering to cause abrasion in bearing, while adding O-shaped rubber
Outside pressure is enclosed, O-shaped rubber ring both sides pressure difference is reduced, improves the sealing effectiveness of O-shaped rubber ring；The O-shaped rubber ring position
Above spiral sealing ring, it is arranged on certain magnitude of interference in bearing groove, auxiliary is played in drilling bit high-speed rotary double
Level sealing function, can be using O-shaped rubber ring sealing when drill bit stops operating, and sealing during operating mode different suitable for rock bit will
Ask, improve sealed reliability.
Advantages of the present invention：1st, novel sealing has pumping sediment outflow feature, can significantly overcome the abrasion that mud particle is caused；2、
The outside pressure of O-shaped rubber ring is increased using helical structure, inside and outside differential pressure is reduced so that the decrement of O-shaped rubber ring subtracts
It is small, heated to reduce, improve its sealing property；3rd, spiral combination sealing can not only realize sealing when drilling bit high-speed is rotated,
Sealing problem when rock bit stops operating can also be solved, reliability is higher；4th, spiral combination sealing has deformation automatic
Compensation function, makes sealing surface remain good contact；5th, spiral combination sealing is placed in gear wheel groove and bearing helicla flute,
Other elements support need not be increased, occupied little space, be the space that rock bit saves preciousness.
Brief description of the drawings
Fig. 1 is a kind of high speed rock bit bearing spiral combined sealing structure figure of the invention.
Fig. 2 is the enlarged drawing of sealing structure at Figure 1A.
In figure：1. tooth pawl；2. gear wheel；3. steel ball；4. plug pin；5. bearing；6. spiral sealing ring；7.O type rubber rings
Embodiment：
The invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of high speed rock bit bearing spiral combined sealing structure, by gear wheel (2), bearing (5), spiral
Sealing ring (6) and O-shaped rubber ring (7) composition.Spiral combined sealing structure is arranged on the sealing between bearing (5) and gear wheel (2)
Intracavitary.
As shown in Fig. 2 gear wheel (2) endoporus is machined with helicla flute, for installing spiral sealing ring (6)；The O-shaped rubber
Cushion rubber (7) makes its lock ring on bearing, positioned at spiral sealing ring (6) by being interference fitted in the groove of bearing (5)
Above.
Coordinate reference picture 1, during this sealing field application, tooth pawl (1) and gear wheel (2) are socketed in axle by gear wheel endoporus respectively
Hold on (5), steel ball (3) is put into after bearing from plug pin hole and is welded and fixed plug pin (4), be maintained at gear wheel (2) by steel ball (3)
On bearing (5).Spiral combination sealing is installed between gear wheel (2) and bearing (5).Spiral sealing ring (6) is arranged on gear wheel (2)
It is interior, it can rotate, be acted on by spiral pump with drill bit during work, the mud particle of bit exterior is discharged outside annular seal space,
Prevent mud particle from entering the abrasion for causing bearing；O-shaped rubber ring (7) when drilling bit high-speed is rotated as auxiliary two-stage sealing,
Effective sealing function is may also function as when drill bit stops operating, after spiral sealing ring (6) fails, O-shaped rubber ring (7) can also be real
Existing wiping seal, moreover it is possible to effectively prevent lubricating grease in bearing bore from leaking, to ensure the good lubrication of bearing.
Structure of the present invention has preferable sediment outflow performance, can effectively reduce the abrasion of bearing, and the structure is not only applicable drill bit
At a high speed rotate when sealing, apply also for drill bit it is static when sealing, seal request during different operating modes can be met, greatly improved
Sealed reliability and stability, it is ensured that the service life of seal.Spiral combination sealing need not increase other supports
Element, occupies little space, and is the space that rock bit saves preciousness.
Claims (1)
1. a kind of high speed rock bit bearing spiral combined sealing structure, including gear wheel (2), bearing (5), spiral sealing ring (6)
With O-shaped rubber ring (7), the spiral combined sealing structure is located in the annular seal space that gear wheel (2) is constituted with bearing (5)；The spiral
Sealing ring (6) is installed in the helicla flute of gear wheel (2) endoporus, and when drilling bit high-speed rotary, the spiral sealing ring (6) can be with brill
First rotation, by the pump action of helicla flute, realizes automatic sand draining function, effectively prevents mud particle from entering to be made in bearing
Into abrasion, while adding O-shaped rubber ring (7) outside pressure, O-shaped rubber ring (7) both sides pressure difference is reduced, O-shaped rubber is improved
The sealing effectiveness of cushion rubber (7)；The O-shaped rubber ring (7) be located at spiral sealing ring (6) above, in drilling bit high-speed rotary from
To auxiliary two-stage sealing effect, sealed reliability can be improved using O-shaped rubber ring sealing (7) when drill bit stops operating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613467.8A CN105134083B (en) | 2015-09-24 | 2015-09-24 | A kind of high speed rock bit bearing spiral combined sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613467.8A CN105134083B (en) | 2015-09-24 | 2015-09-24 | A kind of high speed rock bit bearing spiral combined sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105134083A CN105134083A (en) | 2015-12-09 |
| CN105134083B true CN105134083B (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510613467.8A Active CN105134083B (en) | 2015-09-24 | 2015-09-24 | A kind of high speed rock bit bearing spiral combined sealing structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN105134083B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545209B (en) * | 2016-01-08 | 2017-09-12 | 西南石油大学 | A kind of double dovetail sealing structure of rock bit |
| CN106989915B (en) | 2017-05-31 | 2020-02-11 | 西南石油大学 | Vertical high-speed roller bit bearing spiral sealing test device |
| CN107091736A (en) * | 2017-05-31 | 2017-08-25 | 西南石油大学 | A kind of method of testing of rock bit helixseal sediment outflow performance |
| CN107036799A (en) * | 2017-05-31 | 2017-08-11 | 西南石油大学 | A kind of method of testing of rock bit helixseal sediment outflow performance |
| CN106989874B (en) * | 2017-05-31 | 2020-02-07 | 西南石油大学 | Horizontal high-speed roller bit bearing spiral seal test device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2259868Y (en) * | 1995-07-31 | 1997-08-20 | 江汉石油管理局钻头厂 | Teethed wheel type tooth drill bit |
| CN201080787Y (en) * | 2007-08-22 | 2008-07-02 | 四川石油管理局成都总机械厂 | Rolling sealing three teeth roller bit |
| CN102287139A (en) * | 2010-06-18 | 2011-12-21 | 北京石油化工学院 | Cone bit metal floating-sealing device |
| CN202745698U (en) * | 2012-03-30 | 2013-02-20 | 幸发芬 | Bearing dual-sealing system of roller bit |
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2015
- 2015-09-24 CN CN201510613467.8A patent/CN105134083B/en active Active
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| CN105134083A (en) | 2015-12-09 |
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