CN109882089B - Oiling-free rotary connector - Google Patents
Oiling-free rotary connector Download PDFInfo
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- CN109882089B CN109882089B CN201910285488.XA CN201910285488A CN109882089B CN 109882089 B CN109882089 B CN 109882089B CN 201910285488 A CN201910285488 A CN 201910285488A CN 109882089 B CN109882089 B CN 109882089B
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- connecting part
- oil seal
- central shaft
- storage chamber
- oil storage
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- 238000009434 installation Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims 3
- 241000309551 Arthraxon hispidus Species 0.000 claims 1
- 239000004519 grease Substances 0.000 abstract description 27
- 230000001050 lubricating effect Effects 0.000 abstract description 18
- 238000005461 lubrication Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 230000005484 gravity Effects 0.000 description 5
- 239000013049 sediment Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Rolling Contact Bearings (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
The invention provides a oiling-free rotary connector which comprises an upper connecting part, a middle connecting part and a lower connecting part, wherein a lifting cavity is arranged in the middle connecting part, the lower connecting part is connected with the middle connecting part, the upper connecting part comprises a connecting base and a central shaft, the central shaft is positioned in the lifting cavity, a bearing group is sleeved on the central shaft, an inner framework oil seal is arranged between the inner wall of the upper end of the middle connecting part and the middle shaft, an outer framework oil seal is arranged between the outer wall of the upper end of the middle connecting part and the connecting base, and an upper oil storage chamber is arranged at the position of the connecting base corresponding to the top end of the middle connecting part. Two oil storage chambers are designed, and the lower oil storage chamber ensures lubrication of the bearing group and can reserve an expansion space of lubricating grease with increased temperature during working; the lubricating grease in the upper oil storage chamber lubricates the outer framework oil seal, so that leakage is reduced, the inner framework oil seal is lubricated, the phenomenon that the lower oil storage chamber is low in oil level and cannot lubricate the inner framework oil seal is avoided, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of rotary connectors for rotary drilling rigs, in particular to a oiling-free rotary connector.
Background
The rotary connector for the rotary drilling rig is one of widely used working devices in the field of the rotary drilling rig, and belongs to a special component with higher safety and reliability requirements in the use process of the rotary drilling rig. There are two types of swivel connectors that are currently common in the market.
First, as shown in fig. 1, the first type of the device comprises an upper connecting part 11, an intermediate part 15 and a lower connecting part 17, wherein a lifting cavity is formed in the intermediate part 15, the intermediate part 15 is in threaded connection with the upper connecting part 11, the lower connecting part 17 comprises a base and a central shaft which are integrally connected, the central shaft is located in the lifting cavity, a nut 13 is installed at one end of the central shaft located in the lifting cavity, a plurality of angular contact ball bearings 14 are sleeved at positions between the nut 13 and the base on the central shaft, an inner skeleton oil seal 16 is arranged between the lower end of the intermediate part 15 and the intermediate shaft, and an oil storage cavity 12 communicated with the lifting cavity is formed in the upper connecting part 11. This structure has the following disadvantages: 1. the plurality of angular contact ball bearings are adopted to be used in series, the single load is too small when the tension is superimposed, the whole device cannot be used normally due to one damage, and the service life is difficult to ensure; 2. too many bearing strings and too small oil storage space are unfavorable for bearing lubrication, and grease needs to be frequently added; 3. the bearing can only select grease with low viscosity, the grease becomes thinner when the temperature is increased during working, the grease is easy to leak from the inner framework oil seal below, and lubricating grease must be frequently added.
The second is shown in fig. 2, which is an improvement on the first, and is formed by integrally forming a central shaft with an upper connecting part 21, a lower connecting part 27 is in threaded connection with a middle connecting part 25, the central shaft is positioned in a lifting cavity, a nut 26 is arranged at one end of the central shaft positioned in the lifting cavity, a plurality of angular contact ball bearings 24 are sleeved at positions, positioned between the nut 26 and a base of the upper connecting part, on the central shaft, an inner framework oil seal 22 is arranged between the upper end of the middle connecting part 25 and the middle shaft, and an oil storage cavity 23 communicated with the lifting cavity is arranged in the lower connecting part 27. Compared with the first structure, the structure has the advantages that the position of the inner framework oil seal 22 is adjusted to the upper end, so that the condition of grease leakage is improved, the number of times of adding lubricating grease is relatively reduced, but the lubricating grease still needs to be added frequently, and the structure has the following defects: 1. the plurality of angular contact ball bearings are adopted to be used in series, the single load is too small when the tension is superimposed, the whole device cannot be used normally due to one damage, and the service life is difficult to ensure; 2. too many bearing strings and too small oil storage space are unfavorable for bearing lubrication, and grease needs to be frequently added; 3. the addition amount of the grease needs to be accurately controlled, the temperature is increased during working, the expansion of the grease needs to have enough space, the inner framework oil seal is arranged at the upper part, the sufficient lubrication cannot be ensured, and the service life is influenced; 4. sediment is adsorbed between the inner framework oil seal and the central shaft under the action of gravity when the inner framework oil seal works upwards, so that the shaft and the sealing ring are not durable, and the service life is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a oiling-free rotary connector to solve the problem that lubricating grease needs to be frequently added in the prior art.
The invention provides a oiling-free rotary connector which comprises an upper connecting part, a middle connecting part and a lower connecting part, wherein a lifting cavity is arranged in the middle connecting part, the lower connecting part is connected with the middle connecting part, the upper connecting part comprises a connecting base and a central shaft, the central shaft is positioned in the lifting cavity, a bearing group is sleeved on the central shaft, an inner framework oil seal is arranged between the inner wall of the upper end of the middle connecting part and the middle shaft, an outer framework oil seal is arranged between the outer wall of the upper end of the middle connecting part and the connecting base, and an upper oil storage chamber is arranged at the position of the connecting base corresponding to the top end of the middle connecting part.
Further, a nut is arranged at one end of the central shaft, which is positioned in the lifting cavity, and the bearing group is sleeved at the position between the nut on the central shaft and the inner framework oil seal.
Further, the bearing group comprises a thrust self-aligning roller bearing and a plurality of deep groove ball bearings which are sequentially arranged from bottom to top.
Further, the number of the deep groove ball bearings is 1-4.
Furthermore, angular contact ball bearings are further arranged above the deep groove ball bearings.
Further, the bearing group comprises a plurality of angular contact ball bearings which are sequentially arranged from bottom to top.
Further, a positioning hole is formed in the nut, and a screw penetrates through the positioning hole to fix the nut on the central shaft.
Further, a lower oil storage chamber is arranged in the upper end of the lower connecting part, and the lower oil storage chamber is communicated with the lifting cavity.
Further, the position of the installation gap between the upper connecting part and the middle connecting part is lower than the position of the outer framework oil seal.
Furthermore, the upper connecting part and the middle connecting part are arranged in a gap in a step mode.
Compared with the prior art, the invention has the following beneficial effects:
1. two oil storage chambers are designed, the lower oil storage chamber ensures lubrication of the bearing set, an expansion space of lubricating grease with increased temperature during working can be reserved, and low-viscosity lubricating grease can be filled to reduce the resistance of the bearing set during working; the upper oil storage chamber is filled with lubricating grease with relatively high viscosity, so that the service life is prolonged, leakage is reduced, the inner framework oil seal is lubricated, the phenomenon that the lower oil storage chamber cannot lubricate the inner framework oil seal due to low oil level is avoided, and the service life is prolonged;
2. the outer skeleton oil seal is installed downwards, the installation gap position between the upper connecting part and the middle connecting part is lower than the position of the outer skeleton oil seal, so that friction generated by the fact that sediment is adsorbed on the outer skeleton oil seal due to the action of gravity is overcome, the service life of the outer skeleton oil seal is longer, the lubricating grease position in the oil storage chamber is higher than that of the outer skeleton oil seal, the outer skeleton oil seal is fully lubricated by means of the action of gravity, dirt such as sediment inside and outside the outer skeleton oil seal is cleaned to a certain extent, and the service life of the outer skeleton oil seal is guaranteed;
3. only one thrust self-aligning roller bearing is used for bearing the tensile force, so that the structure is optimized, the superposition of forces is avoided, and the service life is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a prior art solution;
FIG. 2 is a schematic structural diagram of another prior art solution;
fig. 3 is a schematic structural view of a rotary joint provided by the invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1, the invention discloses a fuel-filling-free rotary connector, which comprises an upper connecting part 31, a middle connecting part 37 and a lower connecting part 311, wherein a lifting cavity is arranged in the middle connecting part 37, the lower connecting part 311 is connected with the middle connecting part 37, and in specific implementation, the upper connecting part 31 comprises a connecting base 314 and a central shaft 313, the central shaft 313 is positioned in the lifting cavity, a bearing group is sleeved on the central shaft 313, an inner framework oil seal 33 is arranged between the inner wall of the upper end of the middle connecting part 37 and the middle shaft 313, an outer framework oil seal 34 is arranged between the outer wall of the upper end of the middle connecting part 37 and the connecting base 314, and an upper oil storage chamber 32 is arranged at the position of the connecting base 314 corresponding to the top end of the middle connecting part 37.
Specifically, the nut 310 is installed at one end of the central shaft 313 located in the lifting cavity, and the bearing set is sleeved at a position between the nut and the inner framework oil seal 33 on the central shaft 313. In this embodiment, the nut 310 is provided with a positioning hole, and a screw passes through the positioning hole to fix the nut 310 on the central shaft 313, so as to prevent the nut 310 from reversing during operation.
In this embodiment, the bearing set includes a thrust self-aligning roller bearing 38 and a plurality of deep groove ball bearings 36 sequentially arranged from bottom to top. The number of the deep groove ball bearings 36 may be 1-4, in this embodiment, the number of the deep groove ball bearings 36 is preferably two, and a certain distance is formed between the two deep groove ball bearings 36, so as to enhance stability. The thrust self-aligning roller bearing 38 receives all the tensile force, and the deep groove ball bearing 36 is used for stabilizing the thrust self-aligning roller bearing 38 and preventing the thrust self-aligning roller bearing 38 from swinging.
Preferably, angular contact ball bearings 35 are further arranged above the deep groove ball bearings 36, and the angular contact ball bearings 35 play a role in positioning.
Of course, in other embodiments, the bearing set may alternatively include a plurality of angular contact ball bearings sequentially disposed from bottom to top.
In this embodiment, a lower oil storage chamber 39 is disposed in the upper end of the lower connecting portion 311, and the lower oil storage chamber 39 is communicated with the lifting cavity. Two oil storage chambers are designed, the lower oil storage chamber 39 ensures lubrication of the bearing set, can reserve an expansion space of lubricating grease with increased temperature during operation, and can be filled with the lubricating grease with low viscosity to reduce the resistance of the bearing set during operation; the upper oil storage chamber 32 is filled with lubricating grease with relatively large viscosity, the lubricating grease of the upper oil storage chamber 32 is higher than the positions of the outer skeleton oil seal 34 and the inner skeleton oil seal 33 in operation, the pressure difference is formed by the dead weight of the grease to fully lubricate the outer skeleton oil seal 34 and lubricate the outer skeleton oil seal 34, the service life is prolonged, the leakage is reduced, the inner skeleton oil seal 33 is lubricated, the phenomenon that the lower oil storage chamber 39 is low in oil level and cannot lubricate the inner skeleton oil seal 33 is avoided, and the service life is prolonged. Because the upper oil reservoir 34 has a certain capacity, the upper oil reservoir is filled with the required lubricating grease when leaving the factory, and the lubricating grease does not need to be filled in a certain working period, so that the function and effect of filling-free lubricating grease are achieved. In particular, the oil filling hole communicating with the upper oil storage chamber may be disposed in the connection base, and the oil filling hole communicating with the lower oil storage chamber may be disposed in the lower connection portion.
In this embodiment, the mounting gap 312 between the upper connecting portion 31 and the intermediate portion 37 is lower than the outer frame oil seal 34. The friction generated by the fact that sediment is adsorbed on the outer framework oil seal 34 under the action of gravity is overcome, the service life of the device is longer, the lubricating grease in the oil storage chamber 32 is higher than that of the outer framework oil seal 34, the outer framework oil seal 34 is fully lubricated under the action of gravity, dirt such as sediment inside and outside the outer framework oil seal 34 is cleaned to a certain extent, and the service life of the device is guaranteed. Further, the mounting gap 312 between the upper connecting portion 31 and the middle portion 37 is stepped, so as to prevent dirt such as silt from entering the outer frame oil seal 34.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (6)
1. The utility model provides a exempt from to refuel swivelling joint head, includes connecting portion, middle portion, lower connecting portion, middle portion is interior to have carries and draws the chamber, lower connecting portion with middle portion connects, it includes connection base and center pin to go up connecting portion, the center pin is located carry and draw the intracavity, the epaxial cover of center is equipped with bearing group, its characterized in that: an inner framework oil seal is arranged between the inner wall of the upper end of the middle joint part and the central shaft, an outer framework oil seal is arranged between the outer wall of the upper end of the middle joint part and the connecting base, and an upper oil storage chamber is arranged at the position of the connecting base corresponding to the top end of the middle joint part;
one end of the central shaft, which is positioned in the lifting cavity, is provided with a nut, and the bearing group is sleeved at the position between the nut on the central shaft and the inner framework oil seal;
the bearing group comprises a thrust self-aligning roller bearing and a plurality of deep groove ball bearings which are sequentially arranged from bottom to top;
a lower oil storage chamber is arranged in the upper end of the lower connecting part, and the lower oil storage chamber is communicated with the lifting cavity;
the position of the installation gap between the upper connecting part and the middle connecting part is lower than the position of the outer framework oil seal.
2. The refuelling-free swivel connector of claim 1, wherein: the number of the deep groove ball bearings is 1-4.
3. The refuelling-free swivel connector of claim 1, wherein: and angular contact ball bearings are further arranged above the deep groove ball bearings.
4. The refuelling-free swivel connector of claim 1, wherein: the bearing group comprises a plurality of angular contact ball bearings which are sequentially arranged from bottom to top.
5. The refuelling-free swivel connector of claim 1, wherein: the nut is provided with a positioning hole, and a screw penetrates through the positioning hole to fix the nut on the central shaft.
6. The refuelling-free swivel connector of claim 1, wherein: the upper connecting part and the middle connecting part are provided with a mounting gap in a step shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910285488.XA CN109882089B (en) | 2019-04-10 | 2019-04-10 | Oiling-free rotary connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910285488.XA CN109882089B (en) | 2019-04-10 | 2019-04-10 | Oiling-free rotary connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109882089A CN109882089A (en) | 2019-06-14 |
| CN109882089B true CN109882089B (en) | 2024-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910285488.XA Active CN109882089B (en) | 2019-04-10 | 2019-04-10 | Oiling-free rotary connector |
Country Status (1)
| Country | Link |
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| CN (1) | CN109882089B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282668A (en) * | 2020-12-03 | 2021-01-29 | 潘茂森 | Rotary joint |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5607257A (en) * | 1994-01-11 | 1997-03-04 | Brewis; Roderick C. | Drilling apparatus |
| JP2002021461A (en) * | 2000-07-12 | 2002-01-23 | Nittoc Constr Co Ltd | Swivel for double-pipe excavator |
| CN201292781Y (en) * | 2008-11-20 | 2009-08-19 | 常琦 | Pressure equilibrium elevator for rotary dugging drill |
| CN201924844U (en) * | 2010-12-13 | 2011-08-10 | 福田雷沃国际重工股份有限公司 | Drill rod elevator of rotary drilling rig |
| CN202578571U (en) * | 2012-05-24 | 2012-12-05 | 福田雷沃国际重工股份有限公司 | Drill stem elevator for anti-slurry rotary drilling rig |
| CN209875075U (en) * | 2019-04-10 | 2019-12-31 | 聂伟荣 | Oiling-free rotary connector |
-
2019
- 2019-04-10 CN CN201910285488.XA patent/CN109882089B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5607257A (en) * | 1994-01-11 | 1997-03-04 | Brewis; Roderick C. | Drilling apparatus |
| JP2002021461A (en) * | 2000-07-12 | 2002-01-23 | Nittoc Constr Co Ltd | Swivel for double-pipe excavator |
| CN201292781Y (en) * | 2008-11-20 | 2009-08-19 | 常琦 | Pressure equilibrium elevator for rotary dugging drill |
| CN201924844U (en) * | 2010-12-13 | 2011-08-10 | 福田雷沃国际重工股份有限公司 | Drill rod elevator of rotary drilling rig |
| CN202578571U (en) * | 2012-05-24 | 2012-12-05 | 福田雷沃国际重工股份有限公司 | Drill stem elevator for anti-slurry rotary drilling rig |
| CN209875075U (en) * | 2019-04-10 | 2019-12-31 | 聂伟荣 | Oiling-free rotary connector |
Non-Patent Citations (1)
| Title |
|---|
| 旋挖钻机主卷扬卷筒的排绳布局;湛良传;刘文彬;饶治国;;工程机械与维修(03);80-82 * |
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| CN109882089A (en) | 2019-06-14 |
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Effective date of registration: 20210331 Address after: Room 311, complex building 8, Changsha blue Real Estate Co., Ltd., No.18, south section of East 11th Road, Changsha area, China (Hunan) pilot Free Trade Zone, Changsha City, Hunan Province, 410100 Applicant after: Hunan Shengshitong Technology Co.,Ltd. Address before: 410100 Xingsha Dongsan road Xingfu Lirun City, Changsha City, Hunan Province Applicant before: Nie Weirong |
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