CN102628338A - Novel roller bit sealing ring - Google Patents
Novel roller bit sealing ring Download PDFInfo
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- CN102628338A CN102628338A CN2011101651097A CN201110165109A CN102628338A CN 102628338 A CN102628338 A CN 102628338A CN 2011101651097 A CN2011101651097 A CN 2011101651097A CN 201110165109 A CN201110165109 A CN 201110165109A CN 102628338 A CN102628338 A CN 102628338A
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Abstract
The invention discloses a novel roller bit sealing ring, which belongs to the field of bearing sealing. The novel roller bit sealing ring is disposed in a sealing groove between a bearing shaft hole and a tooth palm journal. Both ends of the sealing groove are respectively communicated with an inside lubricating oil channel and an outside drilling fluid channel. The novel roller bit sealing ring comprises a metal framework fixed in the sealing groove, the metal framework separates the sealing groove into a lubricating oil sealing groove communicated with the inside lubricating oil channel and a drilling fluid sealing groove communicated with the outside drilling fluid channel. A lubricating oil sealing part is disposed in the lubricating oil sealing groove and completely seals and separates the inside lubricating oil channel together with the metal framework. A drilling fluid sealing part is disposed in the drilling fluid sealing groove and completely seals and separates the outside drilling fluid channel together with the metal framework. The novel roller bit sealing ring is more suitable for severe environment of drilling work, and capable of more effectively and simultaneously separating lubricating oil and drilling fluid, rock debris and the like. Separation of lubricating oil and separation of drilling fluid do not affect each other, and service life of a sealing device is prolonged.
Description
Technical field
The invention belongs to the bearing seal field, relate in particular to and be used for oil or geological drilling seals with cone bit bearing.
Background technology
The life-span of rock bit depends primarily on the life-span of bit bearing, and the life-span of bearing relies on the life-span of sealing to a great extent, and U.S. Hughes Electronics predicts bit life according to sealing reliability exactly.The present development trend of rock bit is the rotating speed high speed, and work condition environment is also more and more abominable, particularly oil drilling, and along with drilling depth is more and more darker, the vulnerability of this link of plain bearing sealing ring is more and more outstanding.
The function of bit bearing sealing is to separate bearing and shaft bottom drilling fluid, does not allow shaft bottom drilling fluid, landwaste etc. to get into bearing, also wants the retainer shaft bearing lubrication oil not leak simultaneously, thereby guarantees the application life of drill bit.
The inefficacy of cone bit bearing sealing mainly is friction, the wearing and tearing of sealing contact surface; And now the cone bit bearing operating mode of rugged environment day by day of being born makes bearing seal more and more can't satisfy to isolate simultaneously the requirement of drilling fluid, landwaste etc. and lubrication oil: the pressure of bottom pressure and bearing lubricant is all very high; And both pressure also often is difficult to balance in the running; Make the contact condition and the contact position that are in seal between the two change easily, the influence sealing; The fluctuation that circulating fluid causes bottom pressure also makes the contact condition and the contact position generation respective change of seal; Contain tempering property media such as a large amount of solid particles in the drilling fluid, these materials get in the sealing ring easily, aggravate the wearing and tearing of seal greatly, and even directly cause seal failure.These factors all can be aggravated the wearing and tearing of seal, and quicken the degraded of rubber parts.
Rock bit seal form commonly used now; Its oil drilling is with O-ring seals material selection high performance hydrogenated nitrile-butadiene rubber; It has high temperature resistant (can use for a long time under 150 ℃ of conditions); Korrosionsmediums such as anti-hydrogen sulfide, steam, good compression set ability, advantages such as higher stretching and tearing strength.But the skin-friction coefficient of rubber is very big, and will play sealing function, must bigger interference be arranged with component, and therefore frictional resistance is big under bearing rotation condition at a high speed, and it is high to rise heat, and wearing and tearing and aging phenomenon are serious, can't guarantee the application life of bearing.Follow-on seal form has also occurred multiple in succession, and as in rubber, dosing PTFE and molybdenum bisuphide etc., though can suitably reduce the friction factor of rubber, it is very big that frictional resistance is appointed, and movable sealing property is also undesirable, still is difficult to satisfy the requirement of bearing life.Some other as increase metal movable sealing structure etc. also has various shortcomings, therefore is difficult to the requirement in application life that reaches desirable.
Summary of the invention
The technical problem that the present invention will solve is: to the problem of prior art existence; A kind of adverse circumstances that can be more suitable for drilling well work are proposed; Can be more effectively isolation lubricating oil and drilling fluid, landwaste etc. simultaneously; Both are independent of each other, and prolong the cone bit bearing sealing of seal life.
The object of the invention realizes through following technical proposals:
A kind of novel rock bit sealing ring; It is located in the seal groove between gear wheel axis hole and the bit leg journel; Said seal groove two ends are communicated with internal lubrication oil passage and outside drilling fluid passage respectively; Comprise the metallic framework that is fixed in the said seal groove; Said metallic framework is separated into seal oil groove that is communicated with internal lubrication oil passage and the drilling fluid seal groove that is communicated with outside drilling fluid passage with the sealing groove, is provided with the seal oil part in the said seal oil groove, and it is with the said internal lubrication oil of the complete seal of metallic framework passage; Be provided with the drilling fluid seal in the said drilling fluid seal groove, it is with the complete said outside drilling fluid passage of seal of metallic framework.
As optimal way, said seal oil part one side static seal gear wheel axis hole inner face, another side movable sealing bit leg journel axial plane.As optimal way, said seal oil part is made up of the elasticity static seal of static seal gear wheel axis hole inner face and the dynamic radial seal spare of movable sealing bit leg journel axial plane, and said dynamic radial seal spare is processed by filled polytetrafluoroethylene.
As optimal way, said seal oil part is formed by the dynamic radial seal spare of movable sealing bit leg journel axial plane with itself and the fixing fixture of metallic framework, and said dynamic radial seal spare is processed by filled polytetrafluoroethylene.
As optimal way, said seal oil part is the high pressure rubber oil sealing.
Further, the movable sealing contact surface of said seal is provided with first helicla flute, and the rotation direction of its rotation direction and bit leg journel is opposite.
As optimal way, said drilling fluid seal one side movable sealing bit leg journel end face.As optimal way, said drilling fluid seal is made up of the end face dynamic seal of movable sealing bit leg journel end face and the resilient infill of filling between end face dynamic seal and metallic framework, and said end face dynamic seal is processed by filled polytetrafluoroethylene.
Further, the movable sealing contact surface of said seal is provided with second helicla flute, and the rotation direction of its rotation direction and bit leg journel is opposite.As optimal way, the movable sealing contact surface of the said seal outside is the plane of smooth bit leg journel end face.
The course of work is: the gap between gear wheel axis hole and the bit leg journel forms grease channel and drilling fluid passage inevitably; Internal lubrication oil can get into seal groove through grease channel thus; Outside drilling fluid, landwaste can get into seal groove through the drilling fluid passage; And metallic framework is isolated seal oil part and drilling fluid seal; And constitute two independently to the shielding system of lubrication oil and drilling fluid, landwaste with both respectively simultaneously: skeleton has enough rigidity to bear the pressure that the inside and outside produces, can equilibrium pressure and keep the seal oil part of both sides and stablizing of drilling fluid seal; Lubrication oil is isolated by seal oil part, metallic framework fully, and has completely cut off the influence of lubricating oil pressure to the drilling fluid seal; Drilling fluid is isolated by drilling fluid seal, metallic framework fully, and has completely cut off the influence to the seal oil part of drilling liquid pressure, landwaste.
Beneficial effect of the present invention: the conventional seals mode mainly adopts single O shape to enclose and seals, and this O shape circle promptly wants the sealed bearing internal lubrication oily, sealed external drilling fluid and landwaste etc. again, and application life is very low.Substituted by some modifieds gradually now, comprising making static seal with O type circle, high-accuracy metallic seal is adopted in movable sealing; Its sealing load is from O shape circle, but there are pressure reduction in internal lubrication oil and outside drilling fluid, and constantly changes; Same O shape circle bears inside and outside differential pressure simultaneously, so the decrement of O shape circle etc. is had very accurate requirement, technical guarantee is difficult; And the pair of metal pair of friction components seal inside and outside medium simultaneously; Sealing is affected, and lubrication oil runs off easily, so the application life of bearing is still not very good.And advantage of the present invention is:
1, by two groups of sealings separately with inside and outside medium; Avoided influencing each other of external and internal pressure: can satisfy isolation fully simultaneously to lubrication oil and drilling fluid, landwaste; Avoid that external and internal pressure is poor, bottom hole pressure surge etc. is to the influence of sealing device; Reduce wear, be more suitable for harsh working environments such as drilling well; Cleverly radial seal and end face seal are combined, can reach the optimal seal effect.
2, elasticity static seal and resilient infill pass to the pressure that lubrication oil, drilling fluid increase on the adjacent dynamic seal through the self sealss principle; Make the sealing pressure of dynamic seal be higher than the pressure of external agency all the time; No matter how pressure medium changes; No matter be static state or dynamic, can both guarantee sealing.Simultaneously and since elasticity static seal and resilient infill not with bit leg journel generation dynamic friction, so do not have wearing and tearing, also meet the demands fully its application life.
3, the filled polytetrafluoroethylene heat-resisting quantity is much better than rubber, can long-term work under 270 ℃ condition, and anti-various corrosivity is all very good, and abrasion resistance is good, and its friction factor than much lower times of rubber, has self lubricity simultaneously, and is not easy to wear when movable sealing.Elasticity static seal/resilient infill combines with dynamic seal; The favorable elasticity of elastic component has guaranteed the lasting reliable sealing effect of filled polytetrafluoroethylene on the one hand; The superperformance of filled polytetrafluoroethylene has guaranteed to have guaranteed again sealing life the life-span of elastic component, and both perfect cooperations make sealing device reach best sealing effectiveness and the life-span.
4, the direction of rotation of its rotation direction of first helicla flute of seal oil part and bit leg journel is anti-, can play good pump and inhale effect, can be with the inside pump pressure of the lubrication oil that leaks in the rotary course, thus play the effect of sealing.Simultaneously; Because bit leg journel lubrication oil in rotary course forms the very thin oil film of one deck between bit leg journel and seal always, therefore big radian has reduced the friction factor between seal and the axle, makes frictional heat little; The wearing and tearing of seal are also very little, prolong its application life greatly.
5, second helicla flute of drilling fluid seal plays good pump suction effect equally; Helicla flute will enter into the outside pumping of drilling fluid of seal contact surface; And the outside is complete plane, fits with the bit leg journel end face all the time, has stoped solid particle entering sealing surfaces such as landwaste.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is the structural representation of dynamic radial seal spare in the embodiment of the invention 1;
Fig. 3 is the structural representation of end face dynamic seal in the embodiment of the invention 1;
Fig. 4 is the structural representation of the embodiment of the invention 2;
Fig. 5 is the structural representation of the embodiment of the invention 3.
The specific embodiment
Following non-limiting examples is used to explain the present invention:
Embodiment 1
Extremely shown in Figure 3 like Fig. 1; A kind of novel rock bit sealing ring; It is located at the seal groove interior 3 between gear wheel axis hole 1 and the bit leg journel 2; Said seal groove two ends are communicated with internal lubrication oil passage 4 and outside drilling fluid passage 5 respectively, comprise the metallic framework 6 that is fixed in the said seal groove 3, and said metallic framework 6 is separated into seal oil groove that is communicated with internal lubrication oil passage 4 and the drilling fluid seal groove that is communicated with outside drilling fluid passage 5 with sealing groove 3; Be provided with the seal oil part in the said seal oil groove; It is provided with the drilling fluid seal with the said internal lubrication oil of metallic framework 6 complete seal passage 4 in said drilling fluid seal groove, and it is with the said outside drilling fluid passage 5 of metallic framework 6 complete seal.Shown in present embodiment is preferred; Endless metal skeleton 6 cross sections are " Z " shape; Be fixed on the gear wheel axis hole 1, the big annulate shaft face of " Z " shape structure is close to gear wheel axis hole 1 inwall interference fit in the present embodiment, and fitting face can be coated with refractory seals glue; Can seal the inside and outside medium fully; " Z " shape metallic framework 6 is adjacent to bit leg journel 2 axial planes with the seal oil part on the one hand, and the seal oil part is close to " Z " shape metallic framework 6 big ring inner peripheral surfaces to realize the static seal to gear wheel axis hole 1 inner face simultaneously, on the other hand the drilling fluid seal is adjacent to bit leg journel 2 end faces.Said seal oil part one side static seal gear wheel axis hole 1 inner face, another side movable sealing bit leg journel 2 axial planes.Shown in present embodiment was preferred, said seal oil part was made up of the elasticity static seal 7 of static seal gear wheel axis hole 1 inner face and the dynamic radial seal spare 8 of movable sealing bit leg journel 2 axial planes, and elasticity static seal 7 adopts rubber rectangular ring; Its material selection hydrogenated nitrile-butadiene rubber, assembling radial compression amount generally selects 15～20% for use, and said dynamic radial seal spare 8 is an annular element; Its cross section is L-shaped; Sagittal plane is sandwiched between elasticity static seal 7 rubber rectangular rings and " Z " shape metallic framework 6 middle end faces, and axial vane surface is a sealing lip, is pressed under elasticity static seal 7 rubber rectangular rings; Dynamic radial seal spare 8 is processed by filled polytetrafluoroethylene; Preferred ultra-fine fibre glass can make polytetrafluoroethylene (PTFE) possess elasticity preferably, and dynamic radial seal spare 8 sealing lips is by elasticity static seal 7 rubber seal radial compactions as filler; The big radian of the following property of sealing lip is improved, about 0.5 the circular runout that can satisfy that the gear wheel bearing exists usually.The movable sealing contact surface of said dynamic radial seal spare 8 is provided with first helicla flute 9, and the rotation direction of its rotation direction and bit leg journel 2 is opposite.Said drilling fluid seal one side movable sealing bit leg journel 2 end faces.As optimal way; Said drilling fluid seal is by the end face dynamic seal 10 of movable sealing bit leg journel 2 end faces and fill end face dynamic seal 10 and the resilient infill 11 of 6 of metallic frameworks is formed; The annular ring that said end face dynamic seal 10 is processed by filled polytetrafluoroethylene is preferably dosed organosilicon and graphite etc., resilient infill 11 preferred square type hydrogenated nitrile-butadiene rubber sealing rings; Can know by rubber ring self sealss property; When extraneous drilling fluid pressure increased, the also corresponding increase of the axial pressure of sealing ring had guaranteed that the sealing load of end face dynamic seal 10 and rubber ring is higher than the pressure of sealing medium all the time.The movable sealing contact surface of said end face dynamic seal 10 is provided with second helicla flute 12, and the rotation direction of its rotation direction and bit leg journel 2 is opposite.The movable sealing contact surface outside 13 of said end face dynamic seal 10 is the plane of smooth bit leg journel 2 end faces.Present embodiment sealing device can not lose efficacy at the situation lower seal that whole gear wheel lost efficacy, thereby farthest guaranteed the application life of gear wheel, and the sealing device can satisfy the high speed gear wheel sealing that a fitting face rotational line speed reaches 5m/s.
Embodiment 2
As shown in Figure 4; In the present embodiment, under the working condition of lubricating oil pressure less than 1MPa, structure can suitably be adjusted; Said seal oil part is formed by the dynamic radial seal spare 14 of movable sealing bit leg journel 2 axial planes with itself and metallic framework 6 fixing fixtures; Fixture is made up of metal fixing 15 and rubber sheet gasket 16, makes metal fixing 15 compress dynamic radial seal spare 14 through metallic framework 6 crimpings, during metallic framework 6 crimpings through metal fixing 15 and dynamic radial seal spare 14 with strength transmission to rubber sheet gasket 16; Make it produce compression, salable lubrication oil from seepage between metal fixing 15 and the rubber sheet gasket 16.Said dynamic radial seal spare 14 is processed by filled polytetrafluoroethylene, and likewise, the movable sealing contact surface of said seal is respectively equipped with first and second helicla flute 9,12, and the rotation direction of its rotation direction and bit leg journel 2 is opposite, and other are also identical with embodiment 1.
As shown in Figure 5, in the present embodiment, under the working condition of lubricating oil pressure less than 1MPa, structure can suitably be adjusted, and said seal oil part is conventional high pressure rubber oil sealing 17, is processed by rubber, and other are identical with embodiment 1.High pressure rubber oil sealing 17 is a kind of high voltage bearing oil enveloping structures, and this class formation uses at other field in a large number.The purpose of here mentioning is to show and all adopts the hydrodynamic seal principle and all should receive patent protection with the similar combination sealing mode of the present invention inside and outside every.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. novel rock bit sealing ring; It is located in the seal groove between gear wheel axis hole and the bit leg journel; Said seal groove two ends are communicated with internal lubrication oil passage and outside drilling fluid passage respectively; It is characterized in that: comprise the metallic framework that is fixed in the said seal groove; Said metallic framework is separated into seal oil groove that is communicated with internal lubrication oil passage and the drilling fluid seal groove that is communicated with outside drilling fluid passage with the sealing groove, is provided with the seal oil part in the said seal oil groove, and it is with the said internal lubrication oil of the complete seal of metallic framework passage; Be provided with the drilling fluid seal in the said drilling fluid seal groove, it is with the complete said outside drilling fluid passage of seal of metallic framework.
2. a kind of novel rock bit sealing ring as claimed in claim 1 is characterized in that: said seal oil part one side static seal gear wheel axis hole inner face, another side movable sealing bit leg journel axial plane.
3. a kind of novel rock bit sealing ring as claimed in claim 2; It is characterized in that: said seal oil part is made up of the elasticity static seal of static seal gear wheel axis hole inner face and the dynamic radial seal spare of movable sealing bit leg journel axial plane, and said dynamic radial seal spare is processed by filled polytetrafluoroethylene.
4. a kind of novel rock bit sealing ring as claimed in claim 1; It is characterized in that: said seal oil part is formed by the dynamic radial seal spare of movable sealing bit leg journel axial plane with itself and the fixing fixture of metallic framework, and said dynamic radial seal spare is processed by filled polytetrafluoroethylene.
5. a kind of novel rock bit sealing ring as claimed in claim 1, it is characterized in that: said seal oil part is the high pressure rubber oil sealing.
6. like claim 2,3 or 4 described a kind of novel rock bit sealing rings, it is characterized in that: the movable sealing contact surface of said seal is provided with first helicla flute, and the rotation direction of its rotation direction and bit leg journel is opposite.
7. a kind of novel rock bit sealing ring as claimed in claim 1 is characterized in that: said drilling fluid seal one side movable sealing bit leg journel end face.
8. a kind of novel rock bit sealing ring as claimed in claim 7; It is characterized in that: said drilling fluid seal is made up of the end face dynamic seal of movable sealing bit leg journel end face and the resilient infill of filling between end face dynamic seal and metallic framework, and said end face dynamic seal is processed by filled polytetrafluoroethylene.
9. like claim 7 or 8 described a kind of novel rock bit sealing rings, it is characterized in that: the movable sealing contact surface of said seal is provided with second helicla flute, and the rotation direction of its rotation direction and bit leg journel is opposite.
10. a kind of novel rock bit sealing ring as claimed in claim 9 is characterized in that: the movable sealing contact surface outside of said seal is the plane of smooth bit leg journel end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110165109.7A CN102628338B (en) | 2011-06-20 | 2011-06-20 | Novel roller bit sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110165109.7A CN102628338B (en) | 2011-06-20 | 2011-06-20 | Novel roller bit sealing ring |
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| Publication Number | Publication Date |
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| CN102628338A true CN102628338A (en) | 2012-08-08 |
| CN102628338B CN102628338B (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110165109.7A Active CN102628338B (en) | 2011-06-20 | 2011-06-20 | Novel roller bit sealing ring |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104145144A (en) * | 2012-03-08 | 2014-11-12 | 恩德莱斯和豪瑟尔两合公司 | Sealing ring and pressure transducer having at least one such sealing ring |
| CN105452590A (en) * | 2013-09-10 | 2016-03-30 | 哈利伯顿能源服务公司 | Sacrificial spacer for well tool inner seal |
| CN107228195A (en) * | 2016-03-25 | 2017-10-03 | 哈尔滨飞机工业集团有限责任公司 | A kind of combination sealing method on undercarriage |
| CN108360979A (en) * | 2018-05-22 | 2018-08-03 | 西南石油大学 | Split type single-cone rotary drill bit |
| CN108442879A (en) * | 2018-05-22 | 2018-08-24 | 西南石油大学 | Split type drill with axial impact function |
| CN108487863A (en) * | 2018-05-22 | 2018-09-04 | 西南石油大学 | Drill bit with torsional pulse function |
| CN108533178A (en) * | 2018-04-03 | 2018-09-14 | 西南石油大学 | Rock bit tooth form sealing structure |
| CN108571290A (en) * | 2018-05-22 | 2018-09-25 | 西南石油大学 | Split type drill with torsional pulse function |
| CN112797079A (en) * | 2021-01-29 | 2021-05-14 | 长沙鑫航机轮刹车有限公司 | Oil deflector ring in airplane wheel and oil deflector ring assembly thereof |
| CN113819048A (en) * | 2021-10-22 | 2021-12-21 | 江西立新机液化设备制造有限公司 | Structure suitable for automatic compensation seal abrasion clearance of high pressure water plunger pump |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104145144A (en) * | 2012-03-08 | 2014-11-12 | 恩德莱斯和豪瑟尔两合公司 | Sealing ring and pressure transducer having at least one such sealing ring |
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| CN105452590A (en) * | 2013-09-10 | 2016-03-30 | 哈利伯顿能源服务公司 | Sacrificial spacer for well tool inner seal |
| CN107228195A (en) * | 2016-03-25 | 2017-10-03 | 哈尔滨飞机工业集团有限责任公司 | A kind of combination sealing method on undercarriage |
| CN108533178A (en) * | 2018-04-03 | 2018-09-14 | 西南石油大学 | Rock bit tooth form sealing structure |
| CN108360979A (en) * | 2018-05-22 | 2018-08-03 | 西南石油大学 | Split type single-cone rotary drill bit |
| CN108442879A (en) * | 2018-05-22 | 2018-08-24 | 西南石油大学 | Split type drill with axial impact function |
| CN108487863A (en) * | 2018-05-22 | 2018-09-04 | 西南石油大学 | Drill bit with torsional pulse function |
| CN108571290A (en) * | 2018-05-22 | 2018-09-25 | 西南石油大学 | Split type drill with torsional pulse function |
| CN112797079A (en) * | 2021-01-29 | 2021-05-14 | 长沙鑫航机轮刹车有限公司 | Oil deflector ring in airplane wheel and oil deflector ring assembly thereof |
| CN112797079B (en) * | 2021-01-29 | 2022-06-07 | 长沙鑫航机轮刹车有限公司 | Oil deflector ring in airplane wheel and oil deflector ring assembly thereof |
| CN113819048A (en) * | 2021-10-22 | 2021-12-21 | 江西立新机液化设备制造有限公司 | Structure suitable for automatic compensation seal abrasion clearance of high pressure water plunger pump |
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| CN102628338B (en) | 2014-06-11 |
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