CN201786262U - Two-stage radial rubber seal roller bit - Google Patents
Two-stage radial rubber seal roller bit Download PDFInfo
- Publication number
- CN201786262U CN201786262U CN2010202532838U CN201020253283U CN201786262U CN 201786262 U CN201786262 U CN 201786262U CN 2010202532838 U CN2010202532838 U CN 2010202532838U CN 201020253283 U CN201020253283 U CN 201020253283U CN 201786262 U CN201786262 U CN 201786262U
- Authority
- CN
- China
- Prior art keywords
- cavity
- bit
- rubber ring
- grease
- rubber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 239000004519 grease Substances 0.000 claims abstract description 31
- 239000011435 rock Substances 0.000 claims description 15
- 230000001050 lubricating effect Effects 0.000 claims description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 6
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model discloses a two-stage radial rubber seal roller bit, which comprises a roller cone and a bit leg, wherein the bit leg and the roller cone are rotationally matched with each other through a bit leg shaft neck and a roller cone shaft hole; a sealing groove is formed at the opening of the roller cone shaft hole; a seal rubber ring is arranged in the sealing groove; a cavity used for accommodating grease is formed in the seal rubber ring; the cavity for accommodating grease is provided with a cavity opening formed on one side of the seal rubber ring in contact with the bit leg shaft neck; the cavity for accommodating grease adopts an annular cavity; and the cavity opening adopts an annular opening. The roller bit has the advantages that the sealing effect of a bearing system of the roller bit is improved, and the reduction of the production cost is facilitated.
Description
Technical field
The utility model relates to geological prospecting and drilling tool technical field, especially relates to radially rubber seal rock bit of a kind of secondary.
Background technology
Rock bit is to be widely used in oil drilling, the drilling tool in geological prospecting and engineering field.The applied environment of rock bit is quite complicated, and sliding bearing and rolling bearing all require the sealing system of suitable complex environment, because sealing system is to do relative motion, under the environment for use of mutual friction, so its application life is very short.At present, domestic and international widely used rock bit is divided into rubber seal and metallic seal dual mode, because drilling well need be at high rotating speed, and high the pressure of the drill, the operation down of HI high impact environment, so the sealing of bearing arrangement is very crucial.Now both at home and abroad in the drill bit that each big drilling tool manufacturing company produces, rubber seal is not suitable for high rotating speed drilling well, very fast inefficacy under high rotating speed, metallic seal is fit to high rotating speed but complex manufacturing, the manufacturing cost height, therefore, design and produce sealing effectiveness better and the hermetically-sealed construction of the lower rock bit of cost of manufacture be the emphasis that the technician pays close attention to always.
The utility model content
In view of this, the purpose of this utility model is to provide radially rubber seal rock bit of a kind of secondary, improves the effect of cone bit bearing system sealing, and helps reducing the rock bit cost of manufacture.
For achieving the above object, the utility model is by the following technical solutions: radially rubber seal rock bit of secondary of the present utility model, comprise gear wheel and bit leg, bit leg, gear wheel rotatably cooperatively interact by bit leg journel and gear wheel axis hole, gear wheel axis hole opening part is provided with seal groove, one sealing rubber ring is set in the seal groove, is provided for holding the cavity of grease in this rubber ring; The described cavity that is used to hold grease is provided with the cavity opening at rubber ring and the contacted side of bit leg journel; The described cavity that is used to hold grease is a ring cavity, and described cavity opening is a circular opening.
Further, rubber ring is crooked in the described cavity that is used to hold grease near the rubber bodies of gear wheel bearing lubricating cavity one side.
Further, a side rubber surface that contacts with bit leg journel at described rubber ring is provided with polytetrafluoroethylene floor.
Further, be used to hold in the cavity of grease and also be provided with metallic framework.
Further, described metallic framework cross section is semicircle.
The beneficial effects of the utility model are: compared with prior art, the sealing rubber ring inboard has increased the cavity that is used to hold grease, lubricating grease in the cavity is not only to the lubricate of rubber ring own, increased rubber ring application life, and cavity formed the pressure buffer area again; Under the working environment at coal mines of complexity, there is pressure difference in the sealing rubber ring both sides, and pressure difference constantly changes, be that gear wheel bearing lubricating cavity is compared the pressure difference that has continuous variation with extraneous mud zone, the pressure difference of this continuous variation can quicken the damage of sealing rubber ring, in the utility model, is provided with cavity in the sealing rubber ring, accommodate lubricant grease in the cavity, so just reduced the pressure difference of sealing rubber ring both sides; Secondly the lubricating grease in the cavity still can play sealing and lubrication after sealing rubber ring lost efficacy; The cavity opening of rubber ring makes the sliding friction surface of rubber ring be divided into two parts, this paper claims that part of sliding friction surface near gear wheel bearing lubricating cavity is a secondary sealing area, claim that part of sliding friction surface near external environment is a primary sealing area, primary sealing area and secondary sealing area just constitute the two-stage sealing, wherein, secondary sealing area is because lubricating condition and flexible improvement, its application life is longer, secondary sealing area still can play sealing effectiveness after primary sealing area loses efficacy, thereby improved the rubber ring whole service life; Further, rubber ring is crooked in the described cavity that is used to hold grease near the rubber bodies of gear wheel bearing lubricating cavity one side, when gear wheel bearing grease zone pressure is big, the contact pressure of secondary sealing area and bit leg journel diminishes, gear wheel bearing grease separate lubrication fat outflows on a small quantity, plays the effect of lubrication and seal rubber ring; When outside lubricating grease zone pressure was big, it is big that the contact pressure of secondary sealing area and bit leg journel becomes, and then outside lubricating grease or mud can not enter inside, play the better seal effect; The rubber ring sliding friction surface is provided with the anti-wear performance that polytetrafluoroethylene floor has increased rubber ring; Be used to hold add in the cavity of lubricant grease metallic framework can avoid rubber ring compressive strain the time cavity distortion dwindle.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by specifically noted structure in following manual and the accompanying drawing.
Description of drawings
Fig. 1 is a structural representation of the present utility model; Fig. 2 is the partial enlarged drawing of sealing rubber ring of the present utility model position among Fig. 1.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
In conjunction with illustrated in figures 1 and 2, radially rubber seal rock bit of secondary of the present utility model comprises gear wheel 6 and bit leg 7, bit leg 7, gear wheel 6 rotatably cooperatively interact by bit leg journel and gear wheel axis hole, gear wheel axis hole opening part is provided with seal groove, one sealing rubber ring 5 is set in the seal groove, is provided for holding the cavity 3 of grease in this rubber ring 5; The described cavity 3 that is used to hold grease is provided with the cavity opening in rubber ring 5 and the contacted side of bit leg journel; The described cavity that is used to hold grease is a ring cavity, and described cavity opening is a circular opening.Bit leg journel and rubber ring 5 contact surfaces are sliding friction surface, owing to be provided with the cavity opening, so sliding friction surface can be divided into two sealing surfaces in these cavity opening both sides, one is near the primary sealing area 4 of external environment one side and the secondary sealing area 2 of close gear wheel bearing lubricating cavity, rubber ring is crooked in the described cavity that is used to hold grease near the rubber bodies of gear wheel bearing lubricating cavity one side, the rubber that also promptly forms that part of rubber ring 5 of secondary sealing area becomes curved shape and bending in the cavity 3 of rubber ring 5, be used to hold in the cavity 3 of grease and also be provided with metallic framework, metallic framework cross section in the present embodiment is semicircle, can adopt resilient iron wire, brandreth etc., described cavity 3 does not dwindle in the time of can preventing that rubber ring 5 is oppressed; The side rubber surface that described rubber ring 5 contacts with bit leg journel during enforcement is provided with polytetrafluoroethylene floor, also is the less poly tetrafluoroethylene of surface coating one deck friction factor that rubber ring 5 is positioned at sliding friction surface one side, increases the anti-wear performance of rubber ring.Generally, because the contact gap of bit leg journel and gear wheel is very little, the quantity of lubricating grease is also considerably less in its space, when outside mud has when entering sealing system on a small quantity, just direct engaging friction zone sealing was lost efficacy at once, and rubber ring 5 adds after the cavity 3 that holds grease in the utility model, mud can promote the lubricating grease engaging friction zone in the cavity 3, has delayed the out-of-service time of sealing.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, other modifications that those of ordinary skills make the technical solution of the utility model or be equal to replacement, only otherwise break away from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of the claim scope of the present utility model.
Claims (5)
1. radially rubber seal rock bit of a secondary, comprise gear wheel and bit leg, bit leg, gear wheel rotatably cooperatively interact by bit leg journel and gear wheel axis hole, gear wheel axis hole opening part is provided with seal groove, one sealing rubber ring is set in the seal groove, it is characterized in that: the cavity that is provided for holding grease in this rubber ring; The described cavity that is used to hold grease is provided with the cavity opening at rubber ring and the contacted side of bit leg journel; The described cavity that is used to hold grease is a ring cavity, and described cavity opening is a circular opening.
2. radially rubber seal rock bit of secondary according to claim 1 is characterized in that: rubber ring is crooked in the described cavity that is used to hold grease near the rubber bodies of gear wheel bearing lubricating cavity one side.
3. radially rubber seal rock bit of secondary according to claim 1 and 2 is characterized in that: a side rubber surface that contacts with bit leg journel at described rubber ring is provided with polytetrafluoroethylene floor.
4. radially rubber seal rock bit of secondary according to claim 3 is characterized in that: be used to hold in the cavity of grease and also be provided with metallic framework.
5. radially rubber seal rock bit of secondary according to claim 4 is characterized in that: described metallic framework cross section is for semicircle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202532838U CN201786262U (en) | 2010-07-09 | 2010-07-09 | Two-stage radial rubber seal roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202532838U CN201786262U (en) | 2010-07-09 | 2010-07-09 | Two-stage radial rubber seal roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201786262U true CN201786262U (en) | 2011-04-06 |
Family
ID=43818229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202532838U Expired - Fee Related CN201786262U (en) | 2010-07-09 | 2010-07-09 | Two-stage radial rubber seal roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201786262U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587835A (en) * | 2012-03-30 | 2012-07-18 | 幸发芬 | Double sealing system for roller bit bearings |
| CN102606075A (en) * | 2012-03-30 | 2012-07-25 | 幸发芬 | Energy-storage bearing seal ring for cone bit |
| CN109113581A (en) * | 2018-09-12 | 2019-01-01 | 江西飞龙钻头制造有限公司 | A kind of drill head lubricating device |
| US11174943B2 (en) | 2017-05-11 | 2021-11-16 | Valqua, Ltd. | Seal structure |
-
2010
- 2010-07-09 CN CN2010202532838U patent/CN201786262U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587835A (en) * | 2012-03-30 | 2012-07-18 | 幸发芬 | Double sealing system for roller bit bearings |
| CN102606075A (en) * | 2012-03-30 | 2012-07-25 | 幸发芬 | Energy-storage bearing seal ring for cone bit |
| US11174943B2 (en) | 2017-05-11 | 2021-11-16 | Valqua, Ltd. | Seal structure |
| CN109113581A (en) * | 2018-09-12 | 2019-01-01 | 江西飞龙钻头制造有限公司 | A kind of drill head lubricating device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20180709 |