CN105003654B - A kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows - Google Patents
A kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows Download PDFInfo
- Publication number
- CN105003654B CN105003654B CN201510260213.2A CN201510260213A CN105003654B CN 105003654 B CN105003654 B CN 105003654B CN 201510260213 A CN201510260213 A CN 201510260213A CN 105003654 B CN105003654 B CN 105003654B
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- China
- Prior art keywords
- drilling rod
- bellows
- magnetic fluid
- sealing structure
- steel ring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/50—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall
- F16J15/52—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall by means of sealing bellows or diaphragms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Earth Drilling (AREA)
Abstract
The present invention discloses the high-speed rotation drilling rod sealing structure of a kind of use magnetic fluid and bellows, including the overall static seal structure of drilling rod and magnetic fluid seal driving device；Wherein, ripple tube top end is fixed by bellows top connection and drilling rod in the overall static seal structure of drilling rod；Bellows bottom is connected with bellows lower end joint；Bellows lower end structure is arranged in drilling rod magnetic fluid seal driving devices by sliding bearing, and magnetic fluid sealing structure outer sleeve is on bellows lower end joint, and upper and lower ends are connected by rolling bearing with drilling rod sleeve respectively；Magnetic fluid sealing structure is also filled between magnetic fluid sealing structure outer barrel and drilling rod；It is fixed between magnetic fluid sealing structure outer barrel and body of heater end face.The Kinematic Decomposition of drilling rod is two parts by the present invention, and bellows is moved with drilling rod, uses static seal；Device for sealing magnetic fluid is static, realizes dynamic sealing, simplifies sealed structure and improves sealing property.
Description
Technical field
The invention belongs to space resources detection technology field, the high-speed rotation for being related to a kind of use magnetic fluid and bellows is bored
Rod seal structure.
Background technology
Since the sixties in last century, the former Soviet Union began attempt to survey of deep space, outer celestial body detecting ability has become one
National strength and the important embodiment of scientific and technological level.The U.S. and the former Soviet Union successfully realize the moon early in the seventies of last century six
Soil sampling is simultaneously returned, nowadays, " traveller " No. 1 40,000 ground moon distances that flown out in the U.S., reaches the solar system
Edge；Meanwhile, Japanese " falcon bird " number detector successfully up-samples in asteroid and returns to the earth.The survey of deep space of China
" Chang'e's project " is just at the early-stage, according to the lunar exploration plan of China, and moon exploration project is divided into " around ", " falling ", " returning " three wars
The stage of omiting, second developing stage of current forward direction is strided forward, and the lunar exploration second phase will realize that soft lunar landing and lunar rover are examined on the spot, and is visited
Three phases of the moon will realize automatic data collection and the return to moon sample.
Tellurian resource is limited, if the resource of outer celestial body can be developed, it will as earth resource weight
The deposit wanted and support, therefore externally celestial body is sampled and analyzes its composition, the sustainable development to the human society energy has
It is of great importance.The formula sampler of drilling through is the sampler form most often selected during survey of deep space is sampled, and drills through the sample mode of formula
Both loose top layer sample can have been gathered, sampling deep layer can also be carried out, hard rock can also be carried out by special design
The sampling of stone so that the sample type that can be gathered is more.During sampling is drilled through, drilling rod needs high-speed rotation.
In order to study thermal characteristics of the drilling rod in drilling process, it is necessary to carry out advance experiment on the ground.In order on ground
The high vacuum environment of outer celestial body is simulated on ball, it is necessary to which whole experimental facilities is sealed.The drive device of rig is located at vacuum
Outside tank, and need to carry out drilling test in thermal vacuum environment, drilling rod will be rotated and be moved back and forth, therefore in drilling rod and very
Need to use dynamic sealing mode between slack tank upper end cover.Therefore a kind of sealing structure that disclosure satisfy that requirement of experiment is needed.
The content of the invention
In view of the above-mentioned problems, the present invention proposes the high-speed rotation drilling rod sealing structure of a kind of use magnetic fluid and bellows,
Including the overall static seal structure of drilling rod and magnetic fluid seal driving device；Wherein, the overall static seal structure of drilling rod includes bellows
Upper end connector, bellows and bellows lower end joint；Magnetic fluid seal driving device include upper rolling bearing, lower rolling bearing,
Magnetic fluid sealing structure outer barrel and magnetic fluid sealing structure.
It is fixed between bellows top connection and drilling rod in the overall static seal structure of the drilling rod；Bellows-sheathed is on drilling rod, top
End with corrugated pipe connector lower surface with fixing；Bellows bottom is connected with bellows lower end joint.
The bellows lower end joint includes end cap, drilling rod sleeve and upper sliding bearing and properties of journal bearing lubricated；End cap set
On drilling rod, top surface is fixed with bellows bottom；Drill rod sleeve jacket casing is fixed between top and end cap on drilling rod；On drilling rod sleeve
Lower two ends are connected by upper sliding bearing with properties of journal bearing lubricated with drilling rod respectively.
In magnetic fluid seal driving device, magnetic fluid sealing structure outer sleeve is on drilling rod sleeve, and upper and lower ends are led to respectively
Rolling bearing is crossed with lower rolling bearing with being connected between drilling rod sleeve；Magnetic is also filled between magnetic fluid sealing structure outer barrel and drilling rod
Fluid seal structure, positioned at upper rolling bearing and lower roller bearing shop；It is fixed between magnetic fluid sealing structure outer barrel and body of heater end face.
The advantage of the invention is that：
1st, it is two parts by the Kinematic Decomposition of drilling rod in sealing structure of the present invention, bellows is moved with drilling rod, used
Static seal；Device for sealing magnetic fluid is static, realizes dynamic sealing；
2nd, in sealing structure of the present invention, drilling rod can make bellows occur compression and stretch, still during vertical motion
The position movement of the vertical direction of bellows bottom head covers and sleeve will not be caused, so sealed effect can be made more preferable；
3rd, in sealing structure of the present invention, guider screw and the supporting structure of guide groove have been used, can both make the perpendicular of drilling rod
Straight motion can further constrain the rotary motion of sleeve and drilling rod again along track progress is determined, be allowed to keep synchronous；
4th, sealing structure of the present invention is for other sealing means, and structure is more succinct, and effect is also more outstanding.
Brief description of the drawings
Fig. 1 is high-speed rotation drilling rod sealed structural representation of the present invention.
In figure：
1- drilling rods entirety static seal structure 2- magnetic fluid seal driving device 3- drilling rods
End connector 102- bellowss on 4- body of heater end face 101- bellowss
Rolling bearing under rolling bearing 202- on 103- bellows lower end joints 201-
203- bearing (ball) cover 204- magnetic fluid sealing structure outer barrel 205- magnetic fluid sealing structures
The left half of right half of steel rings of steel ring 101c- of 101a- corrugated pipe connectors 101b-
101d- elastic washer 103a- end cap 103b- drilling rod sleeves
The upper sliding bearing 103d- properties of journal bearing lubricated 103e- guider screws of 103c-
103f- guide grooves
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Sealing structure of the present invention, including the overall static seal structure of drilling rod and magnetic fluid seal driving device, including drilling rod are whole
Body static seal structure 1 and magnetic fluid seal driving device 2, as shown in Figure 1.Wherein, the overall static seal structure 1 of drilling rod is used for realizing
The vertically movable sealing of drilling rod 3, including end connector 101, bellows 102 and bellows lower end joint 103 on bellows.Magnetic current
Body sealed gearing device 2 is used for realizing the sealing of the rotary motion of drilling rod 3, including upper rolling bearing 201, lower rolling bearing 202, axle
Socket end lid 203, magnetic fluid sealing structure outer barrel 204 and magnetic fluid sealing structure 205.
The overall static seal structure 1 of the drilling rod in practical work process all as drilling rod 3 is moved, it is used close
Envelope mode is the mode of static seal.In drilling rod entirety static seal structure 1, end connector 101 includes corrugated pipe connector on bellows
101a, left half of steel ring 101b, right half of steel ring 101c and elastic washer 101d.Wherein, corrugated pipe connector 101a is enclosed on drilling rod 3
On, by being tightly fixed between the outer wall of drilling rod 3.Rubber seal is provided between corrugated pipe connector 101a and the outer wall of drilling rod 3, it is real
Now sealing between the two.Integral ring-shaped steel ring is constituted between left semi-ring steel ring 101b and right semi-ring steel ring 101c, is enclosed on drilling rod 3,
And be stuck in the annular groove A designed in the outer wall circumference of drilling rod 3, the positioning of steel ring lower surface is realized by annular groove A.The upper end of steel ring
Face is realized by elastic collar 101d and positioned, and is specially：By determining that steel ring is arranged at that corrugated pipe connector 101a top surfaces circumferentially open up
In the groove of position, and fitted with detent bottom surface；Elastic collar 101d is enclosed on drilling rod 3, and is arranged in detent, bottom surface
Fit, match somebody with somebody in circumference with the annular groove B that is opened up in detent inwall circumference with left semi-ring steel ring 101b with right semi-ring steel ring 101c
Close insertion；The positioning of steel ring is realized from there through elastic collar 101d and annular groove A, the axial float of steel ring is prevented.Above-mentioned steel ring
To be tightly fixed between corrugated pipe connector 101a, while making between steel ring and drilling rod 3 for interference fit fixation.In order to preferably real
Existing fiting effect between steel ring and corrugated pipe connector 101a, can use industrial glue that steel ring and corrugated pipe connector 101a are entered into one
Step is fixed, so when drilling rod 3 rotates, it is ensured that end connector 101a can be with the synchronous rotary of drilling rod 3 on bellows.
The bellows 102 is enclosed on drilling rod 3, circumferentially has gap between the inwall of bellows 102 and the outer wall of drilling rod 3.Ripple
The top of pipe 102 is welded and fixed with corrugated pipe connector 101a lower surfaces；The bottom of bellows 102 is connected with bellows lower end joint.It is real
Among border, because the length of drilling rod 3 is longer, therefore bellows 102 can be formed using multistage coaxial welding, so make bellows upper end
The cost reduction of joint 101.
The bellows lower end joint 103 include end cap 103a, drilling rod sleeve 103b and upper sliding bearing 103c and under
Sliding bearing 103d.Wherein, end cap 103a is enclosed on drilling rod 3 has gap between drilling rod 3；End cap 103a top surfaces and bellows
102 bottoms are welded and fixed.Drilling rod sleeve 103b is enclosed on drilling rod 3, is fixed between top and end cap 103a by trip bolt, and logical
Cross and set rubber seal to realize the sealing between drilling rod sleeve 103b and end cap 103a.In order to prevent trip bolt from loosening, tight
Gu it is provided with elastic washer between screw and end cap 103a.Drilling rod sleeve 103b upper and lower ends respectively by upper sliding bearing 103c with
Properties of journal bearing lubricated 103d is connected with drilling rod 3, by two sliding bearings, reduces in drilling rod 3 during vertical motion, drilling rod 3
The frictional force produced between drilling rod sleeve 103b, improves mechanical efficiency.It is installed with and leads on the wall of drilling rod sleeve 103b bottoms
To screw 103e, while relevant position axially mills out a guide groove 103f along drilling rod 3 on the wall of drilling rod 3, make guider screw
103e is located in guide groove 103f, can be moved along guide groove 103f；From there through between guider screw 103e and guide groove 103f
Coordinate, the vertically movable along track progress is determined of drilling rod 3 can be made, drilling rod sleeve 103b and drilling rod 3 can be further constrained again
Between rotary motion, make between drilling rod sleeve 103b and drilling rod 3 keep it is synchronous.
In magnetic fluid seal driving device 2, magnetic fluid sealing structure outer barrel 204 is enclosed on drilling rod sleeve 103b, and up and down two
End passes through upper rolling bearing 201 respectively by being connected between upper rolling bearing 201 and lower rolling bearing 202 and drilling rod sleeve 103b
With lower rolling bearing 202, reduce in the drilling process of drilling rod 3, deposited between magnetic fluid seal driving device 2 and drilling rod sleeve 103b
The frictional force produced in the relative rotation of high speed.Magnet fluid sealing is also filled between magnetic fluid sealing structure outer barrel 204 and drilling rod 3
Structure 205, between upper rolling bearing 201 and lower rolling bearing 202.Magnetic fluid sealing structure 205 is outstanding for small magnetic-particle
Float over and ferrofluid is formed in the carrying objects such as glycerine, be magnetic material, magnetic fluid in drilling rod 3 and drilling rod sleeve 103b thus
When sealing structure outer barrel 204 is nonmagnetic substance, drilling rod 3 and drilling rod sleeve 103b are rotated together, and pole tip magnetic flux density is big,
Magnetic field intensity is high, constitutes magnetic circuit with drilling rod 3 and drilling rod sleeve 103b, ferrofluid is concentrated and is formed magnetic fluid circular rings, real
Existing magnetic fluid seal driving device 2 and the at a high speed sealing between the drilling rod sleeve 103b of rotation；Magnet fluid sealing can reach No leakage,
Without abrasion, axle need not be high-precision, is not required to outer lubricating system, it is adaptable to high vacuum, the occasion of high speed.Pass through magnet fluid sealing
Structure 205 also realizes the fixation of relative position between rolling bearing 201 and lower rolling bearing 202.Also covered on drilling rod sleeve 103b
There is bearing (ball) cover 203, coordinated between bearing (ball) cover 203 and the top of magnetic fluid sealing structure outer barrel 204 by shoulder and positioned and fixed,
The positioning of rolling bearing 201 in realization.Lower rolling bearing 202 is located through in the bottom of magnetic fluid sealing structure outer barrel 204
The annular boss designed in wall circumference is realized.It is solid by trip bolt between magnetic fluid sealing structure outer barrel 204 and body of heater end face 4
It is fixed；For the purposes of preventing trip bolt from loosening, cushion is provided between trip bolt and magnetic fluid sealing structure outer barrel 204
Circle.Due to belonging to static seal between body of heater end face 4 and magnetic fluid sealing structure outer barrel 204, therefore in magnetic fluid sealing structure outer barrel
Sealing can be achieved by installing rubber seal between 204 and body of heater end face 4.
In the drilling process of drilling rod 3, the motion of drilling rod 3 is made up of high-speed rotation and vertically movable two parts.Thus, pass through
In the sealed structure of high-speed rotation drilling rod of the present invention, in the drilling process of drilling rod 3, end connector 101 and drilling rod 3 on whole bellows
Between geo-stationary, with the together high-speed rotation of drilling rod 3, by bellows 102 bellows lower end joint 103 can be ensured with drilling rod 3
Together high-speed rotation, and keep constant with 3 vertical positions of drilling rod.Body of heater end cap 4 is in the drilling process of drilling rod 3, remains stationary,
By magnetic fluid seal driving device 2, the dynamic sealing between drilling rod sleeve 103b and body of heater end face 4 is realized, and does not influence drilling rod
Between sleeve 103b and body of heater end face 4 relatively rotate, and drilling rod sleeve 103b vertical motion.
Claims (6)
1. the high-speed rotation drilling rod sealing structure of a kind of use magnetic fluid and bellows, it is characterised in that：It is integrally quiet including drilling rod
Sealing structure and magnetic fluid seal driving device；Wherein, the overall static seal structure of drilling rod includes end connector, bellows on bellows
With bellows lower end joint；Magnetic fluid seal driving device includes upper rolling bearing, lower rolling bearing, outside magnetic fluid sealing structure
Cylinder and magnetic fluid sealing structure；
In the overall static seal structure of the drilling rod, end connector includes corrugated pipe connector, left semi-ring steel ring, right half on the bellows
Ring steel ring and elastic collar；Wherein, corrugated pipe connector fixed cover is on drilling rod；Constituted between left semi-ring steel ring and right semi-ring steel ring whole
Body annular steel ring, is enclosed on drilling rod, and be stuck in the annular groove A designed in drilling-rod external wall circumference；The upper surface of steel ring passes through bullet
Property collar realize positioning, be specially：Steel ring is arranged in the detent that corrugated pipe connector top surface is circumferentially opened up, and with positioning
Groove floor is fitted；Elastic collar is enclosed on drilling rod, and is arranged in detent, bottom surface and left semi-ring steel ring and right semi-ring steel
Annular groove B cooperation insertions in circle laminating, circumference with being opened up in detent inwall circumference；
It is fixed between end connector and drilling rod on bellows；Bellows-sheathed circumferentially has on drilling rod between ripple inside pipe wall and drilling-rod external wall
There is gap；The top of bellows is fixed with corrugated pipe connector lower surface；Bellows is formed using multistage coaxial welding, bellows bottom
End is connected with bellows lower end joint；
The bellows lower end joint includes end cap, drilling rod sleeve and upper sliding bearing and properties of journal bearing lubricated；End cap is enclosed on brill
On bar, top surface is fixed with bellows bottom；Drill rod sleeve jacket casing is fixed between top and end cap on drilling rod, and by setting rubber
Sealing ring realizes sealing；Drilling rod sleeve upper and lower ends are connected by upper sliding bearing with properties of journal bearing lubricated with drilling rod respectively；
In magnetic fluid seal driving device, magnetic fluid sealing structure outer sleeve is on drilling rod sleeve, and upper and lower ends are respectively by upper
Rolling bearing is with lower rolling bearing with being connected between drilling rod sleeve；Magnetic fluid is also filled between magnetic fluid sealing structure outer barrel and drilling rod
Sealing structure, positioned at upper rolling bearing and lower roller bearing shop；It is fixed between magnetic fluid sealing structure outer barrel and body of heater end face, pass through
Rubber seal is set to realize sealing.
2. a kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows as claimed in claim 1, it is characterised in that：
It is to be tightly fixed between the corrugated pipe connector and drilling rod；It is to be tightly fixed between steel ring and corrugated pipe connector；Steel ring and drilling rod
Between for interference fit fix.
3. a kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows as claimed in claim 1, it is characterised in that：
Further fixed by industrial glue between steel ring and corrugated pipe connector.
4. a kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows as claimed in claim 1, it is characterised in that：
Guider screw is installed with the drilling rod sleeve base end wall face, while relevant position is axially set along drilling rod on drilling rod wall
In respect of guide groove, guider screw is set to be located in guide groove.
5. a kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows as claimed in claim 1, it is characterised in that：
The magnetic fluid sealing structure is that small magnetic-particle is suspended in the ferrofluid formed in carrying object.
6. a kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows as claimed in claim 1, it is characterised in that：
The drilling rod is magnetic material with drilling rod sleeve, and magnetic fluid sealing structure outer barrel is nonmagnetic substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260213.2A CN105003654B (en) | 2015-05-20 | 2015-05-20 | A kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260213.2A CN105003654B (en) | 2015-05-20 | 2015-05-20 | A kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows |
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| Publication Number | Publication Date |
|---|---|
| CN105003654A CN105003654A (en) | 2015-10-28 |
| CN105003654B true CN105003654B (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510260213.2A Active CN105003654B (en) | 2015-05-20 | 2015-05-20 | A kind of high-speed rotation drilling rod sealing structure of use magnetic fluid and bellows |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106898455B (en) * | 2017-03-06 | 2018-08-14 | 中国科学院合肥物质科学研究院 | A kind of motion seal structure in high magnetic flux toroidal magnet high vacuum environment |
| CN110553816B (en) * | 2019-10-22 | 2022-04-15 | 中国计量大学 | Fluctuating wall resistance testing device based on fish swimming posture |
| CN111412288B (en) * | 2019-12-11 | 2022-03-25 | 杭州大和热磁电子有限公司 | Integrated multi-shaft magnetic fluid sealing device |
| CN111964949B (en) * | 2020-07-03 | 2024-02-09 | 北京卫星制造厂有限公司 | Intensive lunar surface water resource extraction and sealing integrated device |
| CN113028060B (en) * | 2021-04-22 | 2022-07-26 | 吕远 | Cylindrical pipe rolling contact sealing device |
| CN114076197A (en) * | 2022-01-19 | 2022-02-22 | 江苏邑文微电子科技有限公司 | Vacuum sealing rotary lifting system and semiconductor equipment |
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|---|---|---|---|---|
| JPH01224572A (en) * | 1988-03-04 | 1989-09-07 | Nec Yamaguchi Ltd | Rotary rectilinear movement introducing machine |
| JPH08121609A (en) * | 1994-10-24 | 1996-05-17 | Nok Corp | Magnetic fluid seal unit for reciprocation and rotation |
| KR100906072B1 (en) * | 2008-06-11 | 2009-07-03 | 박광준 | Magnetic fluid sealing member and vacuum sealing device including the same |
| CN102720501A (en) * | 2012-06-18 | 2012-10-10 | 哈尔滨工业大学 | Coring mechanism capable of maintaining original geological bedding information |
| CN203187784U (en) * | 2013-03-22 | 2013-09-11 | 山东紫晶光电新材料有限公司 | Sealing device of seeding shaft of gemstone furnace |
-
2015
- 2015-05-20 CN CN201510260213.2A patent/CN105003654B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01224572A (en) * | 1988-03-04 | 1989-09-07 | Nec Yamaguchi Ltd | Rotary rectilinear movement introducing machine |
| JPH08121609A (en) * | 1994-10-24 | 1996-05-17 | Nok Corp | Magnetic fluid seal unit for reciprocation and rotation |
| KR100906072B1 (en) * | 2008-06-11 | 2009-07-03 | 박광준 | Magnetic fluid sealing member and vacuum sealing device including the same |
| CN102720501A (en) * | 2012-06-18 | 2012-10-10 | 哈尔滨工业大学 | Coring mechanism capable of maintaining original geological bedding information |
| CN203187784U (en) * | 2013-03-22 | 2013-09-11 | 山东紫晶光电新材料有限公司 | Sealing device of seeding shaft of gemstone furnace |
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| CN105003654A (en) | 2015-10-28 |
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