CN202451049U - Seal device of transmission shaft of PDM (positive displacement motor) drill - Google Patents
Seal device of transmission shaft of PDM (positive displacement motor) drill Download PDFInfo
- Publication number
- CN202451049U CN202451049U CN2012200382708U CN201220038270U CN202451049U CN 202451049 U CN202451049 U CN 202451049U CN 2012200382708 U CN2012200382708 U CN 2012200382708U CN 201220038270 U CN201220038270 U CN 201220038270U CN 202451049 U CN202451049 U CN 202451049U
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- Prior art keywords
- transmission shaft
- bearing
- ing
- bush
- lock sleeve
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- Expired - Fee Related
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Abstract
The utility model relates to a seal device of a transmission shaft of a PDM (positive displacement motor) drill. The seal device comprises the transmission shaft. The seal device is characterized in that a transmission shaft shell is sleeved on the outer side of the transmission shaft, an axial rolling thrust bearing block, a lock sleeve and a connection sleeve are arranged between the transmission shaft and the transmission shaft shell; the lock sleeve is arranged under the axial rolling thrust bearing block and the connection sleeve is arranged on the axial rolling thrust bearing block; a lower radial sliding bearing is arranged between the lock sleeve and the transmission shaft, and an upper radial sliding bearing is arranged between the connection sleeve and the transmission shaft shell; and the upper part of the upper radial sliding bearing is sealed by an upper seal element, and the lower part of the lower radial sliding bearing is sealed by the lower seal element. The seal device disclosed by the utility model has the advantages of simple structure and good sealing performance, the transmission shaft has long service life, a problem that an opening bearing structure is seriously abraded and has short service life can be well solved and also the work efficiency of construction is largely improved.
Description
Technical field
The utility model belongs to the drilling tool in the drilling machinery class, particularly a kind of screw drill transmission shaft sealing device.
Background technology
Power transmission shaft is important composition parts of helicoid hydraulic motor, and it passes to drill bit with the torque and the rotating speed of motor output, bears the axial and radial load in the drilling process simultaneously.The lubricating system of bearing directly affects the application life of structure, performance and the power transmission shaft of journal bearing and thrust bearing, influences the supporting capacity of power transmission shaft and the maximum (top) speed of helicoid hydraulic motor simultaneously.All adopt open bearing arrangement at present, bearing is lubricated by drilling mud.Owing to contain solid particle in the drilling mud, also make in the time of by its lubricating bearings the bearing wear aggravation to cause the power transmission shaft parts of existing helicoid hydraulic motor shorter application life.
Summary of the invention
The utility model purpose: the utility model provides a kind of screw drill transmission shaft sealing device, its objective is solution open bearing arrangement in the past short problem in the existing application life that causes because of serious wear.
Technical scheme:
The screw drill transmission shaft sealing device comprises power transmission shaft, it is characterized in that: be with transmission shaft shell in the power transmission shaft outside, between power transmission shaft and transmission shaft shell, also be provided with axial rolling thrust bearings, lock sleeve and branch sleeve; Lock sleeve is arranged on the below of axial rolling thrust bearings, and branch sleeve is arranged on the top of axial rolling thrust bearings; Be provided with down bush(ing) bearing between lock sleeve and the power transmission shaft, be provided with bush(ing) bearing between branch sleeve and the transmission shaft shell; Last bush(ing) bearing top is sealed by last potted component, and following bush(ing) bearing bottom is sealed by the lower seal element.
Last potted component and lower seal element can be made up of one or more groups respectively, and they are that last bush(ing) bearing, following bush(ing) bearing and the thrust bearings of axially rolling form the seal lubrication space.
Power transmission shaft is provided with the shaft shoulder, and the thrust bearings of axially rolling is arranged on the shaft shoulder.
Be provided with step at the transmission shaft shell inwall, this step leans against the upper end of axial rolling thrust bearings.
Between lock sleeve and the transmission shaft shell by being threaded.
Lock sleeve is all or part of to be enclosed within the transmission shaft shell.
Advantageous effect: the utility model provides a kind of screw drill transmission shaft sealing device, comprises power transmission shaft, is with transmission shaft shell in the power transmission shaft outside, on power transmission shaft, also is provided with axial rolling thrust bearings, lock sleeve and branch sleeve; Lock sleeve is arranged on the below of axial rolling thrust bearings, and branch sleeve is arranged on the top of axial rolling thrust bearings; Be provided with down bush(ing) bearing between lock sleeve and the power transmission shaft, be provided with bush(ing) bearing between branch sleeve and the transmission shaft shell; Last bush(ing) bearing top is sealed by last potted component, and following bush(ing) bearing bottom is sealed by the lower seal element.
The beneficial effect of the utility model is: form airtight lubricated space between the last potted component of screw drill transmission shaft sealing device and the lower seal element; The lubrication oil of inside is kept apart with outside drilling mud; Reached the purpose of using the oil lubrication bearing; Bearing is worked under desirable lubricating condition, reduced the wearing and tearing of bearing, prolonged the application life of power transmission shaft parts.
Description of drawings:
Fig. 1 is the structural representation of the utility model.Among the figure, the 1-power transmission shaft; The 2-lock sleeve; 3-lower seal element; Bush(ing) bearing under the 4-; The 5-transmission shaft shell; The 6-thrust bearings of axially rolling; The last bush(ing) bearing of 7-; The last potted component of 8-; The 9-branch sleeve.
The specific embodiment:
As shown in Figure 1: the utility model provides a kind of screw drill transmission shaft sealing device; Comprise power transmission shaft 1; Be with transmission shaft shell 5 in power transmission shaft 1 outside, between power transmission shaft 1 and transmission shaft shell 5, be provided with axial rolling thrust bearings 6, lock sleeve 2 and branch sleeve 9; Lock sleeve 2 is arranged on the below of axial rolling thrust bearings 6, and branch sleeve 9 is arranged on the top of axial rolling thrust bearings 6; Be provided with down bush(ing) bearing 4 between lock sleeve 2 and the power transmission shaft 1; Between branch sleeve 9 and transmission shaft shell 5, be provided with bush(ing) bearing 7; Last bush(ing) bearing 7 tops are by last potted component 8 sealings, and following bush(ing) bearing 4 bottoms are by 3 sealings of lower seal element.
Power transmission shaft 1 is provided with the shaft shoulder, and the thrust bearings of axially rolling 6 is arranged on the shaft shoulder.
Be provided with step at transmission shaft shell 5 inwalls, this step leans against the upper end of axial rolling thrust bearings 6.Between lock sleeve 2 and the transmission shaft shell 5 by being threaded.
Lock sleeve 2 all or part of being enclosed within the transmission shaft shell 5.
Last potted component 8 can adopt rubber, macromolecular material or carbide alloy to process with lower seal element 3; Go up potted component 8 during use and can be respectively one or more groups with lower seal element 3; They are for last bush(ing) bearing 7, bush(ing) bearing 4 and the thrust bearings 6 of axially rolling form the seal lubrication spaces down; Avoid outside drilling mud and inner lubricating oil blending, reach the purpose of using the oil lubrication bearing.
The utility model is simple in structure, good seal performance, power transmission shaft longer service life, has well solved short problem of existing serious wear of open bearing arrangement and application life, the operating efficiency when also having improved simultaneously construction greatly.
Claims (6)
1. screw drill transmission shaft sealing device; Comprise power transmission shaft (1); It is characterized in that: be with transmission shaft shell (5) in power transmission shaft (1) outside, between power transmission shaft (1) and transmission shaft shell (5), also be provided with axial rolling thrust bearings (6), lock sleeve (2) and branch sleeve (9); Lock sleeve (2) is arranged on the below of axial rolling thrust bearings (6), and branch sleeve (9) is arranged on the top of axial rolling thrust bearings (6); Be provided with down bush(ing) bearing (4) between lock sleeve (2) and the power transmission shaft (1), between branch sleeve (9) and transmission shaft shell (5), be provided with bush(ing) bearing (7); Last bush(ing) bearing (7) top is by last potted component (8) sealing, and following bush(ing) bearing (4) bottom is sealed by lower seal element (3).
2. screw drill transmission shaft sealing device according to claim 1; It is characterized in that: going up potted component (8) and lower seal element (3) can be made up of one or more groups respectively, and they are that last bush(ing) bearing (7), following bush(ing) bearing (4) and axial rolling thrust bearings (6) form the seal lubrication space.
3. screw drill transmission shaft sealing device according to claim 1 is characterized in that: power transmission shaft (1) is provided with the shaft shoulder, and the thrust bearings of axially rolling (6) is arranged on the shaft shoulder.
4. according to claim 1,2 or 3 described screw drill transmission shaft sealing devices, it is characterized in that: be provided with step at transmission shaft shell (5) inwall, this step leans against the upper end of axial rolling thrust bearings (6).
5. screw drill transmission shaft sealing device according to claim 4 is characterized in that: between lock sleeve (2) and the transmission shaft shell (5) by being threaded.
6. screw drill transmission shaft sealing device according to claim 1 is characterized in that: lock sleeve (2) is all or part of to be enclosed within the transmission shaft shell (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200382708U CN202451049U (en) | 2012-02-07 | 2012-02-07 | Seal device of transmission shaft of PDM (positive displacement motor) drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200382708U CN202451049U (en) | 2012-02-07 | 2012-02-07 | Seal device of transmission shaft of PDM (positive displacement motor) drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202451049U true CN202451049U (en) | 2012-09-26 |
Family
ID=46866919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200382708U Expired - Fee Related CN202451049U (en) | 2012-02-07 | 2012-02-07 | Seal device of transmission shaft of PDM (positive displacement motor) drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202451049U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196440A (en) * | 2014-07-11 | 2014-12-10 | 江汉石油钻头股份有限公司 | Sealing-type screw drill transmission shaft assembly |
| CN104295231A (en) * | 2014-09-16 | 2015-01-21 | 西南石油大学 | Low-friction-drag variable-diameter hydraulic thruster |
| CN106351948A (en) * | 2016-08-29 | 2017-01-25 | 中石化石油机械股份有限公司江钻分公司 | A undermine sealing and righting thrust bearing system |
-
2012
- 2012-02-07 CN CN2012200382708U patent/CN202451049U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196440A (en) * | 2014-07-11 | 2014-12-10 | 江汉石油钻头股份有限公司 | Sealing-type screw drill transmission shaft assembly |
| CN104295231A (en) * | 2014-09-16 | 2015-01-21 | 西南石油大学 | Low-friction-drag variable-diameter hydraulic thruster |
| CN104295231B (en) * | 2014-09-16 | 2016-08-24 | 西南石油大学 | A kind of low frictional resistance reducing hydrodynamic thrust device |
| CN106351948A (en) * | 2016-08-29 | 2017-01-25 | 中石化石油机械股份有限公司江钻分公司 | A undermine sealing and righting thrust bearing system |
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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: 20120926 Termination date: 20180207 |