CN101429974A - Flexible universal shaft - Google Patents
Flexible universal shaft Download PDFInfo
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- CN101429974A CN101429974A CNA2008101579389A CN200810157938A CN101429974A CN 101429974 A CN101429974 A CN 101429974A CN A2008101579389 A CNA2008101579389 A CN A2008101579389A CN 200810157938 A CN200810157938 A CN 200810157938A CN 101429974 A CN101429974 A CN 101429974A
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Abstract
The invention discloses a flexible universal shaft. The external structure of a universal joint of the universal shaft is a petal type connecting body replaced by an elastic sleeve which is woven by elastic steel wires or steel bars, and flexible soft links are replaced by rigid hard links. Torque moment of the universal shaft is mainly born by the external structure of the universal joint, thus the universal shaft rotates flexibly and conveniently, and has extremely high wearing resistance. In normal operation, the torque moment transmits mainly through the steel wires or the steel bars. When the torque moment bears a torque force or other forces, because of flexibility of the torque moment, the impact of forces is slowed down, and the torque moment is transformed to a pulling force, the universal shaft is not easy to crack, and has longer service life. Detachable joint components are installed in an inner cavity of the elastic sleeve. Gaps between detachable joints are utilized to form rotation planes with different angles, and the adjustment of the detachable joints can be finished according to practical requirements, so that the realization of application angles in the industrial and mining and requirements of customers can be met.
Description
Technical field
The present invention relates to a kind of cardan shaft of free camber, particularly be fit to the cardan shaft that different cambers change the helicoid hydraulic motor use that requires.
Background technique
Helicoid hydraulic motor is widely used in a plurality of fields, as geologic prospecting, drilling well, well workover, the exploitation of coal gas layer, the crossing construction of various pipelines and defence engineering aspect creep into operation.And in recent years in the drilling well of oil gas field, helicoid hydraulic motor is used to special well, and at this moment requires helicoid hydraulic motor must be adapted to the conversion of various angles.As bore directional well, high angle hole, horizontal well, extended reach well, multilateral well, cluster well etc. and also can use its drilling straight-hole simultaneously.
Helicoid hydraulic motor is made up of by-pass valve assembly, motor assembly, cardan shaft assembly, this four major part of driving-shaft assembly.
Cardan shaft assembly in the present helicoid hydraulic motor (in curved housing), its camber connecting shaft body all adopts the fixedly connecting shaft body of camber scope, when drillng operation, a kind of angle of every change must be changed the curved housing of respective angles and connect the variation that axis body could be realized angle.This is because at present the coupling shaft that uses is thick walled tube radially to be cut into intermeshing two branches and the petal body that do not disconnect, the line of cut of sealing constitutes certain interval, the size in gap depends on the size of camber scope, because two lobe intracoelomic cavities are by ball seat and spheroid or scratch lever arrangement and bear pressure, the moment of torsion transmission that while lobe body bears drilling tool, wearing and tearing gradually in use, the gap of lobe seam is strengthened gradually, and ball seat and spheroid or the wearing and tearing of scratching bar also diminish gradually or shorten, axial clearance is increased gradually, so the lobe body bears certain axial pressure at work, its gathering throat also just diminishes gradually, make two lobe bodies more and more dumb, and strengthened transmitting torque, more increased the increasing of lobe body cutting gap.When the gap increases to certain limit, under drilling tool moment of torsion and pulling force, two lobe bodies are very easily thrown off, will inevitably cause drilling failure like this, so the cardan shaft that uses creeps into because of raising (referring to special well, high angle hole, horizontal well, extended reach well, multilateral well, cluster well, straight well, well logging) little drilling tool that just can not adapt to heavy camber of angle as cardan shaft in drilling process that drilling well requires at present, must change cardan shaft, the petal partial aperture is diminished bear excessive torque and camber is excessive, accelerated the speed of wearing and tearing and drilling tool was lost efficacy in advance.Particularly lobe formula cardan shaft comes transmitting torque by the friction of face and face, and not only operating life is shorter relatively for he, and has also consumed a large amount of mechanical energy at work, has reduced the output torque of drilling tool, has reduced the efficient of motor.The present structure of the cardan shaft demand of the various drillng operations of incompatibility thus.
The design will adapt to various angles variations and bring bigger convenience and benefit to the user with the succinct and durable structure of a kind of novelty.
Summary of the invention
Technical problem to be solved by this invention provides the flexible universal shaft that a kind of simple in structure, long service life, the various angles of adaptation change.
For solving the problems of the technologies described above, technological scheme of the present invention is: flexible universal shaft, comprise first joint of importing power and second joint of outputting power, and be provided with universal joint between described first joint and described second joint, described universal joint comprises:
The resilient sleeve of elastic wire or steel bar braiding, two ends are fixedly mounted on described first joint and second joint, are used for transmitting torque and adapt to power input shaft and the change in location of pto.
Active joint assembly, be installed in described resilient sleeve inside, degrees of freedom with any bending, be used to prevent moving axially between described first joint and second joint, and stop the elastic wire of described resilient sleeve or steel bar destructive crooked to the resilient sleeve inner chamber, the active joint in the two ends of described active joint assembly is connected to described first joint and second joint respectively, and perhaps the active joint in two ends is respectively as the part of described first joint and second joint.
As a kind of preferred scheme, described elastic wire or steel bar are left-handed on described sleeve to be arranged alternately with dextrorotation.
As a kind of preferred scheme, described active joint assembly comprises at least three active joints, has between the described adjacent two active joint end faces to be respectively equipped with the spherical shape pit on certain interval and the end face, in the described pit steel ball is installed.
As to improvement of the technical scheme, be provided with the lubrication channel that is communicated with spherical shape pit and described active joint outer surface in the described active joint.
As a kind of preferred scheme, described active joint assembly comprises at least three active joints, an active joint end face between the described adjacent two active joints is provided with the semi-cylindrical projection, another active joint end face between the described adjacent two active joints is provided with the semi-cylindrical groove that matches with the semi-cylindrical projection, and the semi-cylindrical projection on end face of the active joint in described centre or the axis of semi-cylindrical projection on semi-cylindrical groove and another end face or semi-cylindrical groove differ 90 °.
As to improvement of the technical scheme, an end face of the active joint in described centre is provided with the semi-cylindrical projection, and another end face is provided with the semi-cylindrical groove.
Owing to adopted technique scheme, the external structure of the universal joint of cardan shaft has been replaced the connecting body of petal type by the resilient sleeve of elastic wire or steel bar braiding, hard connection by firm formula becomes flexible being flexible coupling, mainly bear the moment of torsion of cardan shaft by it, mainly do not bearing under the situation of pressure, rotate flexiblely, high wear resistance is arranged.During normal use, moment of torsion mainly by steel wire or steel bar transmission, when bearing torsion or other power, because it is flexible, has slowed down the impact of power, and torque axis has been become pulling force, so be not easy fracture, the life-span is longer.The elastic wire that moves axially, can stop again described resilient sleeve that can prevent between described first joint and second joint or steel bar have been installed to the destructive crooked active joint assembly of inner chamber at the inner chamber of resilient sleeve, utilize the slit between the active joint, can form the rotation surface of various different amount, its adjusting can be finished according to actual needs, therefore can satisfy the realization of various application point in the industrial and mineral, satisfy requirement of client.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the structural representation of the embodiment of the invention two.
Embodiment
Embodiment one:
As shown in Figure 1, flexible universal shaft comprises first joint 1 of importing power and second joint 2 of outputting power, is provided with universal joint between described first joint 1 and described second joint 2, and described universal joint comprises:
The resilient sleeve 3 of elastic wire or steel bar braiding, two ends are fixedly mounted on described first joint 1 and second joint 2, are used for transmitting torque and adapt to power input shaft and the change in location of pto; Described resilient sleeve 3 is the two-layer at least sleeve of elastic wire or steel bar braiding.Described elastic wire or steel bar are left hand screw on described sleeve and right-hand screw is arranged alternately, and the two ends of every steel wire or steel bar all are fixed on described first joint 1 and second joint 2.
Described active joint assembly 4 comprises at least three active joints, and present embodiment shows the situation of four active joints, has between the described adjacent two active joint end faces to be respectively equipped with the spherical shape pit on certain interval and the end face, and steel ball 44 is installed in the described pit.
Be provided with the lubrication channel 45 that is communicated with spherical shape pit and described active joint outer surface in the described active joint 41,42,43, lubrication channel 45 can guarantee that mud enters in the spherical shape pit by the slit of resilient sleeve 3, play the effect of lubricated steel ball 44, guarantee that active joint work is flexible.
Present embodiment satisfies the demand of industrial and mineral operation in the existing scope by the following aspects:
1. the external structure of universal joint is worked out by steel wire or steel bar, and the adjustment of camber is more prone to; 2. lubricate each inner parts to reduce friction through the steel wire filtered liquid, prolonged working life; 3. because it is flexible bearing the resilient sleeve of moment of torsion, can slow down various drags largely, the difficult fracture, the life-span is longer; 4. because its frictional force is very little, can greatly reduce the loss during transmitting torque, thus the efficient of raising motor, energy saving.
Embodiment two:
Present embodiment and embodiment's one structure is basic identical, and difference is that described active joint assembly distinguishes to some extent.
In the present embodiment, described active joint assembly 4 comprises at least three active joints, present embodiment shows the situation of six active joints, an active joint end face between the described adjacent two active joints is provided with semi-cylindrical projection 51, another active joint end face between the described adjacent two active joints is provided with the semi-cylindrical groove that matches with the semi-cylindrical projection, and the semi-cylindrical projection on end face of the active joint in described centre or the axis of semi-cylindrical projection on semi-cylindrical groove and another end face or semi-cylindrical groove differ 90 °.
In the present embodiment, an end face of the active joint in described centre is provided with the semi-cylindrical projection, and another end face is provided with the semi-cylindrical groove.Active joint was identical in the middle of this structure made, thereby can select any joint number combination, reduced production costs, and was convenient to maintain and replace.
The described active joint assembly of present embodiment also has the effect of transmitting torque, thereby has shared the moment of torsion transmission of resilient sleeve except the effect of the described active joint assembly that occupy embodiment one, has prolonged working life.
Above embodiment only is the distance of best mode for carrying out the invention, rather than limiting the scope of the invention.As the common engineers and technicians of related domain, any equivalence techniques conversion of making based on invention spirit of the present invention is all within protection scope of the present invention.
Claims (6)
1. flexible universal shaft comprises first joint of importing power and second joint of outputting power, is provided with universal joint between described first joint and described second joint, and it is characterized in that: described universal joint comprises
The resilient sleeve of elastic wire or steel bar braiding, two ends are fixedly mounted on described first joint and second joint, are used for transmitting torque and adapt to power input shaft and the change in location of pto;
Active joint assembly, be installed in described resilient sleeve inside, degrees of freedom with any bending, be used to prevent moving axially between described first joint and second joint, and stop the elastic wire of described resilient sleeve or steel bar destructive crooked to the resilient sleeve inner chamber, the active joint in the two ends of described active joint assembly is connected to described first joint and second joint respectively, and perhaps the active joint in two ends is respectively as the part of described first joint and second joint.
2. flexible universal shaft as claimed in claim 1 is characterized in that: described elastic wire or steel bar are left-handed on described sleeve to be arranged alternately with dextrorotation.
3. flexible universal shaft as claimed in claim 1 or 2, it is characterized in that: described active joint assembly comprises at least three active joints, have between the described adjacent two active joint end faces and be respectively equipped with the spherical shape pit on certain interval and the end face, in the described pit steel ball is installed.
4. flexible universal shaft as claimed in claim 3 is characterized in that: be provided with the lubrication channel that is communicated with spherical shape pit and described active joint outer surface in the described active joint.
5. flexible universal shaft as claimed in claim 1 or 2, it is characterized in that: described active joint assembly comprises at least three active joints, an active joint end face between the described adjacent two active joints is provided with the semi-cylindrical projection, another active joint end face between the described adjacent two active joints is provided with the semi-cylindrical groove that matches with the semi-cylindrical projection, and the semi-cylindrical projection on end face of the active joint in described centre or the axis of semi-cylindrical projection on semi-cylindrical groove and another end face or semi-cylindrical groove differ 90 °.
6. flexible universal shaft as claimed in claim 5 is characterized in that: an end face of the active joint in described centre is provided with the semi-cylindrical projection, and another end face is provided with the semi-cylindrical groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101579389A CN101429974B (en) | 2008-10-16 | 2008-10-16 | Flexible universal shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101579389A CN101429974B (en) | 2008-10-16 | 2008-10-16 | Flexible universal shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101429974A true CN101429974A (en) | 2009-05-13 |
| CN101429974B CN101429974B (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101579389A Expired - Fee Related CN101429974B (en) | 2008-10-16 | 2008-10-16 | Flexible universal shaft |
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| Country | Link |
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| CN (1) | CN101429974B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107948A1 (en) * | 2016-12-12 | 2018-06-21 | 吴谞冠 | Flexible transmission device |
| CN108861269A (en) * | 2018-06-15 | 2018-11-23 | 湖南志合众信科技有限公司 | A kind of access goods flexible connecting device |
| CN109899000A (en) * | 2017-12-08 | 2019-06-18 | 中国石油化工股份有限公司 | A kind of casing nipple |
| CN112576182A (en) * | 2020-11-30 | 2021-03-30 | 中国石油天然气集团有限公司 | Wire passing motor drilling tool |
| CN115306322A (en) * | 2021-05-06 | 2022-11-08 | 中国石油化工股份有限公司 | Flexible power nipple joint for ultra-short radius drilling and use method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201377522Y (en) * | 2008-10-16 | 2010-01-06 | 潍坊盛德石油机械制造有限公司 | Flexible cardan shaft |
-
2008
- 2008-10-16 CN CN2008101579389A patent/CN101429974B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107948A1 (en) * | 2016-12-12 | 2018-06-21 | 吴谞冠 | Flexible transmission device |
| CN110268176A (en) * | 2016-12-12 | 2019-09-20 | 吴谞冠 | Flexible gearing |
| CN110268176B (en) * | 2016-12-12 | 2021-06-08 | 吴谞冠 | Flexible transmission device |
| CN109899000A (en) * | 2017-12-08 | 2019-06-18 | 中国石油化工股份有限公司 | A kind of casing nipple |
| CN108861269A (en) * | 2018-06-15 | 2018-11-23 | 湖南志合众信科技有限公司 | A kind of access goods flexible connecting device |
| CN112576182A (en) * | 2020-11-30 | 2021-03-30 | 中国石油天然气集团有限公司 | Wire passing motor drilling tool |
| CN112576182B (en) * | 2020-11-30 | 2022-04-12 | 中国石油天然气集团有限公司 | Wire passing motor drilling tool |
| CN115306322A (en) * | 2021-05-06 | 2022-11-08 | 中国石油化工股份有限公司 | Flexible power nipple joint for ultra-short radius drilling and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101429974B (en) | 2012-03-28 |
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Denomination of invention: Flexible universal joint shaft Effective date of registration: 20230921 Granted publication date: 20120328 Pledgee: Postal Savings Bank of China Limited by Share Ltd. Weifang branch Pledgor: WEIFANG SHENGDE PETROLEUM MACHINERY MANUFACTURING CO.,LTD. Registration number: Y2023980057909 |
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| 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: 20120328 |