CN201826754U - Roller bit metal floating sealing device - Google Patents
Roller bit metal floating sealing device Download PDFInfo
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- CN201826754U CN201826754U CN2010202361590U CN201020236159U CN201826754U CN 201826754 U CN201826754 U CN 201826754U CN 2010202361590 U CN2010202361590 U CN 2010202361590U CN 201020236159 U CN201020236159 U CN 201020236159U CN 201826754 U CN201826754 U CN 201826754U
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Abstract
Provided is a roller bit metal floating sealing device comprising a moving sealing ring (1), a static sealing ring (2) and a heterotype rubber sealing ring (3), wherein, the external end part of the bore of the gear wheel (4) where the moving sealing ring (1) is is formed into a sealing cavity (6) with the root part of a leg journal (5), the metal sealing device combined by the moving sealing ring (1), the static sealing ring (2) and the heterotype rubber sealing ring (3) is arranged in the sealing cavity (6) , an interference fit is provided between the moving sealing ring (1) and the gear wheel (4), the other end of the moving sealing ring (1) is contacted with the bore shoulder of the gear wheel (4), the end faces of the moving sealing ring (1) and the static sealing ring (2) are formed into a sealing surface, the heterotype rubber sealing ring (3) is compressed in a root circular groove (51) by the static sealing ring (2). The device in the utility model modifies the structure of the gear wheel (4), simplifies the sealing structure and facilitates in processing, furthermore, the device reduces manufacture cost and wearing as well as improves the reliability of sealing, wear resistance performance and service lifetime.
Description
Technical field
The utility model relates to a kind of rock bit metal sealing device, the rock bit metal floating seal that the cone bit bearing position of using in particular for oil, natural gas, mine, well and geological drilling seals.
Background technology
The metal floating seal is a kind of hermetically-sealed construction with good high temperature resistant, anti-wear performance, be widely used in oil, mine, etc. the bad working environments occasion in field, its effect is the oil leak that prevents in the annular seal space, stop the intrusion of foreign matter, guarantee that sealed parts (as bearing etc.) work under good ambient conditions, to prolong life cycle.The early stage floating seal that uses is two O type rubber ring structures, promptly adopt two very high metal end face sealing ring and two O type rubber seal of hardness to constitute sealing device, symmetrical configuration, one of rotation of two joint rings is static, axial compression by contact surface compresses the formation end face seal, and the sealing structure is called the bimetallic floating seal.Because rock bit is when underground work, rotating speed is had relatively high expectations, bit bearing sealing system space is little, also to bear heavy duty and vibration, a rubber ring in the bimetallic (spring cone) seal structure also will rotate at a high speed, just make the fretting wear aggravation of bearing and potted component, reduced working life, so there are hermetically-sealed construction deficiencies such as complexity, hermetically-sealed construction axial dimension are big, the easy intrusion of mud causes that sealing ring is corroded in bimetallic (spring cone) seal.In order to overcome the shortcoming of bimetallic (spring cone) seal, the monometallic hermetically-sealed construction occurred, this hermetically-sealed construction has reduced by a rubber ring that needs rotation, helps to improve the reliability of sealing performance and drill bit use, reduced axial dimension simultaneously, made the sliding bearing of rock bit that bigger loaded area be arranged.
In Chinese patent CN1069557A, proposed the monometallic hermetically-sealed construction, but its O RunddichtringO still is subject to mud-corrosion, causes the O RunddichtringO can not keep enough elastic forces for a long time.In addition, it is big that the gear wheel endoporus circular bead surface of fitting with joint ring will become high-precision sealing surface difficulty of processing, and abrasion resistance is also bad.Another part Chinese patent CN2099225U has done improvement to above-mentioned patent structure, on the endoporus shoulder, adorned the sealing mat of a full contact, but need on the endoporus circular bead surface, process the groove of placing sealing mat, though saved the hermetically-sealed construction axial dimension, same difficulty of processing is big, can not satisfy high-precision cooperation requirement.Technology in Chinese patent CN200982158 proposition, though be pressed into ring by increasing auxiliary seal pad and gear wheel endoporus, the processing and the wear-resisting problem of gear wheel endoporus circular bead surface have been solved, improved the reliability of sealing, but still need to process the inclined-plane that holds the O RunddichtringO on the bit leg journel, the shortcoming that difficulty of processing is big, assembly precision is high still exists, and the coupling of auxiliary seal pad and O type circle also is a problem.U.S. Pat 7, the technology that proposes in 413,037 is only optimized the structure that auxiliary seal pad gear wheel endoporus is pressed into ring, the bit leg journel difficulty of processing is big, O type rubber ring weares and teares the problem of the difficult coupling of auxiliary seal pad and O type circle easily but still exist.
Summary of the invention
According to background technology, the purpose of this utility model is the deficiency that exists at above-mentioned existing metal floating seal, adopt a special-shaped rubber seal to replace the mode of rubber o-ring and support rubber circle, designed a kind of rock bit metal floating seal.
To achieve these goals, the utility model is achieved through the following technical solutions:
A kind of rock bit metal floating seal, mainly by rotary packing ring (1), stationary seal ring (2) and special-shaped rubber seal (3) are formed, wherein: the position, outer end of the residing gear wheel of rotary packing ring (1) (4) endoporus and bit leg journel (5) root constitute annular seal space (6), by rotary packing ring (1), the metal floating seal that stationary seal ring (2) and special-shaped rubber seal (3) are formed is installed in the annular seal space (6), endoporus (11) interference fit of rotary packing ring (1) and gear wheel (4), the other end of rotary packing ring (1) contacts with gear wheel (4) endoporus shoulder, rotary packing ring (1) rotates with gear wheel (4), rotary packing ring (1), the end face of stationary seal ring (2) matches, constitute sealing surface in relative rotation, special-shaped rubber seal (3) is compressed on the bit leg journel (5) by stationary seal ring (2).
Special-shaped rubber seal (3) is housed between the inner conical surface of described bit leg journel (5) and stationary seal ring (2), the sealing surface of special-shaped rubber seal (3) comprises end face (31), the conical surface (32) and periphery (33), annular projection (34) is arranged on the conical surface (32), form the static seal face between special-shaped rubber seal (3) and the stationary seal ring (2).
The conical surface (32) of described special-shaped rubber seal (3), the angle that its shaft section tilts is less than the inner conical surface angle of inclination of stationary seal ring (2).
Described bit leg journel (5) is cylindrical, and the bit leg root has annular groove (51), and special-shaped rubber seal (3) is embedded in the annular groove (51) of bit leg journel (5) root and tightly is enclosed within on the bit leg journel (5).
The periphery of described stationary seal ring (2) is stepped, and the end face external diameter that stationary seal ring (2) contacts with rotary packing ring (1) is greater than the external diameter of another end face of stationary seal ring (2).
Described rotary packing ring (1) is made by materials such as stainless steel, carbide alloy, high-speed steel with stationary seal ring (2), on the end face of rotary packing ring (1) and stationary seal ring (2) hard ceramic materials or diamond class superhard material coating is arranged.
Described special-shaped rubber seal (3) is made by the rubber elastomeric material.
The utility model comprises rotary packing ring, stationary seal ring and special-shaped rubber seal.Rotary packing ring and gear wheel endoporus are interference fit, and the other end of rotary packing ring contacts with gear wheel endoporus shoulder, and rotary packing ring rotates with gear wheel.The end face of rotary packing ring, stationary seal ring matches, and constitutes sealing surface in relative rotation.Special-shaped rubber seal is enclosed within on the bit leg journel, the bottom is embedded in the root notches of bit leg journel, in the drill bit course of work, special-shaped rubber seal snare does not move on bit leg journel, and the frictional force between while and the stationary seal ring has also stoped rotatablely moving of stationary seal ring.Special-shaped rubber seal is housed between bit leg journel and stationary seal ring, the end face of special-shaped rubber seal and the conical surface and stationary seal ring constitute static seal, stop mud and landwaste to invade annular seal space, simultaneously stationary seal ring is applied axial force, make rotary packing ring, stationary seal ring closely contact the formation sealing surface, prevent the intrusion and the lubricating grease leakage of outside mud.
Owing to adopted technique scheme, the utlity model has following advantage and effect:
1, the utility model adopts a rubber o-ring and a support rubber circle in the special-shaped rubber seal replacement metallic seal, has simplified hermetically-sealed construction;
2, the utility model bit leg journel is by the original complex-curved face of cylinder that is reduced to, and processes more conveniently, reduced manufacturing cost;
3, the end face of special-shaped rubber ring sealing ring of the present utility model and the conical surface and stationary seal ring fit tightly and form the static seal face.Annular projection is arranged on the conical surface, can play the effect of rubber o-ring sealing.Because the supporting role of conical surface rubber, make projection that bigger axis sealing can be provided with less distortion.Sealing between end face and the stationary seal ring can stop mud to enter the sealing surface of forming between the conical surface and projection and the stationary seal ring, has increased the reliability of sealing;
4, the special-shaped rubber seal of the utility model is enclosed within on the bit leg journel, and tightly is pressed in by stationary seal ring in the annular groove of bit leg root, and running does not move on axle journal, has reduced the wearing and tearing between itself and the bit leg journel, has improved application life.
5, the utility model has increased the contact length between stationary seal ring and the rotary packing ring end face, has reduced specific contact pressure, has reduced wearing and tearing.
6, the utility model stationary seal ring and rotary packing ring end face adopt hard ceramic materials or diamond class superhard material coating, have improved anti-wear performance.
Description of drawings
Fig. 1 is the tricone bit schematic appearance
Fig. 2 is a rock bit shaft section schematic diagram
Fig. 3 is a structural representation of the present utility model
Fig. 4 is the utility model structure partial structure enlarged drawing
Fig. 5 is the special-shaped rubber seal section of structure of the utility model
The specific embodiment
Further specify structure of the present utility model below in conjunction with accompanying drawing.
By Fig. 1 to Fig. 5 illustrate, a kind of rock bit metal floating seal, mainly by rotary packing ring 1, stationary seal ring 2 and special-shaped rubber seal 3 are formed, wherein: the position, outer end of rotary packing ring 1 residing gear wheel 4 endoporus and bit leg journel 5 roots constitute annular seal space 6, by rotary packing ring 1, the metal floating seal that stationary seal ring 2 and special-shaped rubber seal 3 are formed is installed in the annular seal space 6, endoporus 11 interference fit of rotary packing ring 1 and gear wheel 4, the other end of rotary packing ring 1 contacts with gear wheel 4 endoporus shoulders, rotary packing ring 1 rotates with gear wheel 4, rotary packing ring 1, the end face of stationary seal ring 2 matches, constitute sealing surface in relative rotation, special-shaped rubber seal 3 is compressed on the bit leg journel 5 by stationary seal ring 2.
Be illustrated in figure 1 as the applied tricone bit of the utility model, three gear wheels are symmetrically distributed.Fig. 2 is the schematic diagram in single roller axle cross section, and the designed hermetically-sealed construction of the utility model is between the root of gear wheel 4 and bit leg journel 5 as can be seen.
As shown in Figure 3, the utility model comprises rotary packing ring 1, stationary seal ring 2, special-shaped rubber seal 3, and matching with the lower surface of stationary seal ring 2 in the upper surface of rotary packing ring 1, constitutes seal face in relative rotation.Rotary packing ring 1 is an interference fit with gear wheel 4 endoporus, can rotate together along with gear wheel 4, and the lower surface of rotary packing ring 1 contacts with gear wheel 4 endoporus circular bead surfaces.Between the conical surface 21 of the axle journal of the annular groove 51 of bit leg journel 5 roots, bit leg journel 5 and stationary seal ring 2, special-shaped rubber seal 3 is housed.
As shown in Figure 4, earlier rotary packing ring 1 is pressed into the endoporus 11 of gear wheel 4 during installation, guarantee interference fit, on the axle journal of bit leg journel 5, put special-shaped rubber seal 3, stationary seal ring 2 then successively, have the gear wheel 4 of rotary packing ring 1 that the locking ball 12 of packing into is promptly finished installation.When the conical surface of the special-shaped rubber seal 3 of stationary seal ring 2 extruding and above circular protrusion 34 time, special-shaped rubber seal 3 can apply an axial force to stationary seal ring 2, stationary seal ring 2 is closely contacted with rotary packing ring 1 end face that rotates, form movable sealing, prevent the lubricating grease leakage.Because conical surface circular protrusion 34 is subjected to the support of special-shaped rubber seal 3 bottom rubber, can not move vertically, not only can produce bigger axial force, and not easy to wear.Stationary seal ring 2 contacts with the end face of special-shaped rubber seal 3, and formed sealing surface can further stop mud and landwaste to invade annular seal space, also can apply an auxiliary axial force to stationary seal ring 2 simultaneously, makes sealing more reliable.The contact seal face of rotary packing ring 1 and stationary seal ring 2 is the plane, and the inboard of stationary seal ring end face 3 is the inclined-plane, can make lubricating grease enter this contact seal face.Rotary packing ring 1 and stationary seal ring 2 all are by Hardmetal materials, stainless steel, and perhaps other metal material are made, and there are hard ceramic materials or diamond class superhard material coating in the surface, has the better wear resistance energy.The periphery of stationary seal ring 2 is stepped, and rotary packing ring 1 contacts the width of the width of end face greater than stationary seal ring 2 another end faces with stationary seal ring 2, by increasing contact width, can reduce the specific contact pressure between rotary packing ring 1 and the stationary seal ring 2, reduces wearing and tearing.Bit leg journel 5 is the face of cylinder, has reduced difficulty of processing.Rotary packing ring 1, stationary seal ring 2 corresponding bit leg journel surfaces should guarantee higher finish by grinding, the journal surface that special-shaped rubber seal is installed then need not grinding, and comparatively coarse surface helps increasing the frictional force with special-shaped rubber ring 3.
As shown in Figure 5, special-shaped rubber seal 3 is made by the rubber elastomeric material, and the sealing surface of special-shaped rubber seal 3 mainly is made up of end face 31, the conical surface 32 and periphery 33.The conical surface 32 of special-shaped rubber seal 3, the angle of its inclination is less than inner conical surface 21 angles of inclination of stationary seal ring 2.Annular projection 34 is arranged on the conical surface, and the shaft section of projection 34 is circular arc, seamlessly transits with conical surface joint.End face 31, the conical surface 32 and periphery 33 form the static seal face respectively and between the end face of stationary seal ring 2, the conical surface and the recess edge.The frictional force of 3 pairs of stationary seal rings 2 of special-shaped rubber seal can effectively stop stationary seal ring 2 the rotatablely moving of Follow-up seal ring 1 in the gear wheel 4 drill bit courses of work.
Claims (7)
1. rock bit metal floating seal, mainly by rotary packing ring (1), stationary seal ring (2) and special-shaped rubber seal (3) are formed, it is characterized in that: the position, outer end of the residing gear wheel of rotary packing ring (1) (4) endoporus and bit leg journel (5) root constitute annular seal space (6), by rotary packing ring (1), the metal floating seal that stationary seal ring (2) and special-shaped rubber seal (3) are formed is installed in the annular seal space (6), endoporus (11) interference fit of rotary packing ring (1) and gear wheel (4), the other end of rotary packing ring (1) contacts with gear wheel (4) endoporus shoulder, rotary packing ring (1) rotates with gear wheel (4), rotary packing ring (1), the end face of stationary seal ring (2) matches, constitute sealing surface in relative rotation, special-shaped rubber seal (3) is compressed on the bit leg journel (5) by stationary seal ring (2).
2. rock bit metal floating seal according to claim 1, it is characterized in that: between the inner conical surface of described bit leg journel (5) and stationary seal ring (2) special-shaped rubber seal (3) is housed, the sealing surface of special-shaped rubber seal (3) comprises end face (31), the conical surface (32) and periphery (33), annular projection (34) is arranged on the conical surface (32), form the static seal face between special-shaped rubber seal (3) and the stationary seal ring (2).
3. rock bit metal floating seal according to claim 2 is characterized in that: the conical surface (32) of described special-shaped rubber seal (3), the angle that its shaft section tilts is less than the inner conical surface angle of inclination of stationary seal ring (2).
4. rock bit metal floating seal according to claim 1, it is characterized in that: described bit leg journel (5) is for cylindrical, the bit leg root has annular groove (51), and special-shaped rubber seal (3) is embedded in the annular groove (51) of bit leg journel (5) root and tightly is enclosed within on the bit leg journel (5).
5. rock bit metal floating seal according to claim 1, it is characterized in that: the periphery of described stationary seal ring (2) is stepped, and the end face external diameter that stationary seal ring (2) contacts with rotary packing ring (1) is greater than the external diameter of another end face of stationary seal ring (2).
6. rock bit metal floating seal according to claim 1, it is characterized in that: described rotary packing ring (1) is made by stainless steel, carbide alloy, high speed steel material with stationary seal ring (2), on the end face of rotary packing ring (1) and stationary seal ring (2) hard ceramic materials or diamond class superhard material coating is arranged.
7. rock bit metal floating seal according to claim 1 is characterized in that: described special-shaped rubber seal (3) is made by rubber elastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202361590U CN201826754U (en) | 2010-06-18 | 2010-06-18 | Roller bit metal floating sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202361590U CN201826754U (en) | 2010-06-18 | 2010-06-18 | Roller bit metal floating sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201826754U true CN201826754U (en) | 2011-05-11 |
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ID=43965298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202361590U Expired - Fee Related CN201826754U (en) | 2010-06-18 | 2010-06-18 | Roller bit metal floating sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201826754U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287139A (en) * | 2010-06-18 | 2011-12-21 | 北京石油化工学院 | Cone bit metal floating-sealing device |
| CN102661123A (en) * | 2012-05-03 | 2012-09-12 | 西南石油大学 | High-temperature resistant floating sealing device for cone bit |
| CN107237608A (en) * | 2017-06-08 | 2017-10-10 | 广汉川亿石油科技有限公司 | Can anticreep the three ratchet wheel drill bits that drive a well |
| CN108533179A (en) * | 2018-04-03 | 2018-09-14 | 西南石油大学 | Rock bit dumbbell type sealing structure |
| CN111456635A (en) * | 2020-03-31 | 2020-07-28 | 浙江工业大学 | double-W-shaped combined metal sealing structure for roller bit |
-
2010
- 2010-06-18 CN CN2010202361590U patent/CN201826754U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287139A (en) * | 2010-06-18 | 2011-12-21 | 北京石油化工学院 | Cone bit metal floating-sealing device |
| CN102661123A (en) * | 2012-05-03 | 2012-09-12 | 西南石油大学 | High-temperature resistant floating sealing device for cone bit |
| CN107237608A (en) * | 2017-06-08 | 2017-10-10 | 广汉川亿石油科技有限公司 | Can anticreep the three ratchet wheel drill bits that drive a well |
| CN108533179A (en) * | 2018-04-03 | 2018-09-14 | 西南石油大学 | Rock bit dumbbell type sealing structure |
| CN108533179B (en) * | 2018-04-03 | 2019-07-09 | 西南石油大学 | Rock bit dumbbell type sealing structure |
| CN111456635A (en) * | 2020-03-31 | 2020-07-28 | 浙江工业大学 | double-W-shaped combined metal sealing structure for roller bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20140618 |
|
| EXPY | Termination of patent right or utility model |