CN201763265U - Underground motor cardan shaft - Google Patents
Underground motor cardan shaft Download PDFInfo
- Publication number
- CN201763265U CN201763265U CN2010202528851U CN201020252885U CN201763265U CN 201763265 U CN201763265 U CN 201763265U CN 2010202528851 U CN2010202528851 U CN 2010202528851U CN 201020252885 U CN201020252885 U CN 201020252885U CN 201763265 U CN201763265 U CN 201763265U
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- cardan
- mandrel
- shaft
- spherical
- feather key
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Abstract
The utility model discloses an underground motor cardan shaft, which comprises an upper cardan joint, a core shaft and a lower cardan joint, and the upper cardan joint, the core shaft and the lower cardan joint are arranged in a shell body of the cardan shaft. The upper cardan shaft and the lower cardan shaft are respectively arranged on two ends of the core shaft; the upper cardan shaft and the lower cardan shaft are respectively contacted with the core shaft by a spherical top block; semi-circle stop keys are respectively arranged on the upper and the lower ends of the core shaft; a spherical sheath is arranged on the semi-circle stop key; a waviness oil seal is arranged at the periphery of the core shaft and connected with the upper cardan joint and the lower cardan joint; the spherical surface of the waviness oil seal is contacted with a spherical surface of the spherical sheath; a spherical top cylindrical surface sliding key is arranged on the core shaft; and the spherical top cylindrical surface sliding key is matched with the core shaft, the upper cardan joint and the lower cardan joint by sliding key. The cardan shaft has simple and compact structure, flexible and reliable utilization, complete function, long service life, large transmission torque and wide serviceable range and is suitable for an underground motor with large torque and low revolving speed required by a well drilling at present.
Description
Technical field
The utility model relates to a kind of oil gas field drilling equipment, relates in particular to a kind of universal shaft of underground motor.
Background technology
In the oil gas field drilling process, need to use a kind of power drive drill bit to rotate broken formation, realize drilling well; Down-hole motor be exactly this be power with the drilling fluid, can transfer fluid pressure to the positive displacement mud motor of mechanical energy.The slurry flows that pumps when slush pump enters motor through bypass valve, forms certain pressure differential at the import and export of motor, promotes the axis rotation of rotor around stator, and rotating speed and moment of torsion are passed to drill bit by universal drive shaft and power transmission shaft, thereby realizes drillng operation.
Because the rotor of motor is eccentric, rotor produces the rotation around self center line when rotating in stator, can rotating speed be refused to be delivered to drill bit with turning round around the revolution of stator center line under the effect of eccentric throw again; In transmittance process, jiggly eccentric rotary of rotor need be delivered to the concentric smooth rotation of power transmission shaft, this process is just realized by universal drive shaft.
What at present, the motor universal drive shaft of domestic use adopted is petal type and ball-joint formula; Petal type processing technology complexity, rubbing surface are unlubricated, so application life is short, can't satisfy rising turn round the requirement of refusing slow-speed of revolution down-hole motor greatly; Though ball-joint formula universal drive shaft has oil lubrication, transmit and to turn round the contact surface of refusing and belong to the line contact, same application life is short, can't satisfy rising turn round the requirement of refusing slow-speed of revolution down-hole motor greatly.
The utility model content
Goal of the invention: at the deficiencies in the prior art, the purpose of this utility model provides a kind of universal shaft of underground motor, with satisfy turn round greatly refuse, slow-revving user demand.
Technical scheme: in order to realize the foregoing invention purpose, the technical solution adopted in the utility model is:
A kind of universal shaft of underground motor, comprise the upper cardan, mandrel and the lower cardan that are arranged in the universal drive shaft housing, described upper cardan and lower cardan are separately positioned on the two ends of mandrel, described upper cardan contacts with mandrel by spherical jacking block respectively with lower cardan, be equipped with the semicircle block key in two ends up and down at mandrel, on the semicircle block key, be provided with spherical cover; Periphery at mandrel is provided with corrugated oil sealing, and corrugated oil sealing is connected with lower cardan with upper cardan, and the spherical of corrugated oil sealing contacts with the sphere of spherical cover; Mandrel is provided with ball fore-set face feather key, and described ball fore-set face feather key forms feather key with mandrel, upper cardan and lower cardan and cooperates.
Described ball fore-set face feather key comprises cylinder, the cylinder side of being provided with plate, and the top of described side's plate is a sphere.
Described feather key cooperates: the cylinder of ball fore-set face feather key is arranged in the cylindrical hole corresponding on the mandrel, can rotate in the cylindrical hole of mandrel correspondence; The square plate of ball fore-set face feather key is arranged on the keyway of upper cardan or lower cardan correspondence, the keyway root cylindrical surface that the sphere of ball fore-set face feather key is corresponding with upper cardan or lower cardan matches, and the face of cylinder of the keyway root of upper cardan or lower cardan correspondence can be rotated on the sphere of ball fore-set face feather key top with the same center of circle along ball fore-set face feather key top sphere.
Be provided with 4 to 8 groups of ball fore-set face feather keys at the two ends of described mandrel.
Be equipped with floating plug on described upper cardan and lower cardan, be provided with O-ring seals between corrugated oil sealing and mandrel, described floating plug and O-ring seals are used the back and form universal drive shaft 2 annular seal spaces up and down, are provided with lubricating grease in the sealing chamber.
On described upper cardan and lower cardan, be equipped with the mobile cavity of floating plug.
Described corrugated oil sealing is 2, and an end of described corrugated oil sealing is a fixed end, and the other end is a free end, and described fixed end is connected with upper cardan or lower cardan by screw thread; Described free end moves up and down on mandrel.
Described corrugated oil sealing comprises seal nipple, O type circle, pressure ring, packing element and lower seal joint; Last seal nipple top is spherical, matches with the spherical of sphere cover, is provided with screw thread and matches with the internal thread of upper cardan or lower cardan on last seal nipple; Described O type circle seals up corrugated oil sealing and upper cardan or lower cardan; To go up the two ends that seal nipple and lower seal joint are fixedly installed on packing element by pressure ring.
Universal drive shaft is with the rotation of the off-centre of motor rotor, is delivered to the steadily rotation with one heart of power transmission shaft, is transmitting huge turning round simultaneously and is refusing drill bit and come fractured rock; Off-centre is being transformed in this process of steady rotation, universal drive shaft two universal joints is up and down finished this work, whole operating principle is: upper cardan is delivered to lower cardan with the rotation of the off-centre of rotor by the universal drive shaft mandrel, after be delivered to power transmission shaft again and produce steadily rotation; Up and down two universal joints transmission turn round refuse and rotating speed in, outside rotating with mandrel, also on mandrel, bob and weave, eliminated the eccentric influence that brings, realized universal function; Universal drive shaft of the present utility model has oil lubrication when two universal joints are bobbed and woven up and down on mandrel, make that the interior movement parts of universal drive shaft is flexible, reliable, has significantly reduced wearing and tearing, has prolonged application life.
Beneficial effect: universal shaft of underground motor of the present utility model, in whole down-hole motor, play a part to form a connecting link, its flexibility and project organization directly affect whole down-hole motor transmission and turn round and refuse and the size of rotating speed, and the intensity of motor rotor and power transmission shaft, be related to application life of whole down-hole motor.The universal shaft of underground motor of this utility model, simple in structure, compact, use flexible, reliable, multiple functional, long service life, transmission to turn round and refuse advantages such as big, it is the substitute of petal type universal drive shaft, have than ball-joint formula universal drive shaft intensity height, transmit to turn round and refuse big, structure than characteristic of simple, be suitable for current drilling well required turn round greatly refuse, slow-speed of revolution down-hole motor.
Use down-hole motor and can realize the drilling well of diameter, inclined shaft, extended reach well, horizontal well, Multilateral Wells, fishbone well, improve in the volume increase of oily company and store up; Reduce land occupation, help protecting environment, shorten and see the well cycle, stop or the generation of minimizing accident; Help few input, fecund goes out, and has reduced development cost greatly.It is supporting that universal drive shaft of the present utility model is suitable for the down-hole motor of 100,165,172,197,244 outside dimensions, and the down-hole motor of above-mentioned outside dimension has been included the required scope of application of drilling well substantially.
Description of drawings
Fig. 1 is the structural representation of down-hole motor.
Fig. 2 is the structural representation of universal shaft of underground motor.
Fig. 3 is the structural representation of corrugated oil sealing.
The structural representation of Fig. 4 ball fore-set face feather key.
Fig. 5 is that the B-B of Fig. 4 is to sectional view.
Fig. 6 is that the A of Fig. 4 is to view.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further explained.
As shown in Figure 1, be the down-hole motor structure.Down-hole motor comprises motor part 1, universal drive shaft part 4 and power transmission shaft part 5.Motor part 1 comprises motor stator 2 and the motor rotor 3 that is arranged in the motor stator 2.Power transmission shaft part 5 comprises power transmission shaft 6 and the power transmission shaft shell 7 that is arranged on outside the power transmission shaft 6.Universal drive shaft shell upper end links to each other with motor case, and universal drive shaft shell lower end links to each other with power transmission shaft shell 7; The universal drive shaft upper end links to each other with motor rotor 3, and the universal drive shaft lower end links to each other with power transmission shaft 6.
As shown in Figure 2, be the structure of universal drive shaft.Universal drive shaft comprises floating plug 8, spherical jacking block 9, upper cardan 10, ball fore-set face feather key 11, semicircle block key 12, spherical cover 13, corrugated oil sealing 14, mandrel 15, lower cardan 16 and shell 17.
Existing universal drive shaft adopts 4 to 6 steel balls to transmit rotating speed and turn round and refuses between universal joint and mandrel; Half is sitting in steel ball in the mandrel, and second half contacts to transmit to turn round with the universal joint half slot and refuses, because steel ball is that line contacts with the universal joint half slot, so quick abrasion, application life are lacked, can't be born to turn round greatly and refuse.
Universal shaft of underground motor of the present utility model, upper cardan 10, lower cardan 16 contacts with mandrel 15 by spherical jacking block 9 respectively, semicircle block key 12 is set in mandrel respectively, and about in the of 15 two ends, withstand on the semicircle block key 12 by sphere cover 13, spherical by corrugated oil sealing 14 contacts with the sphere of spherical cover 13 again, corrugated oil sealing 14 screw threads and upper cardan 10, lower cardan 16 is threaded, mandrel 15 is provided with ball fore-set face feather key 11, ball fore-set face feather key 11 and mandrel 15, upper cardan 10 and lower cardan 16 form feather key together and cooperate, and just form whole universal drive shaft part 4.
As Fig. 4, Fig. 5 and shown in Figure 6, be the structure of ball fore-set face feather key 11.Ball fore-set face feather key 11 lower cylindrical bodies 24 on the universal shaft of underground motor of the present utility model inject in the cylindrical hole of mandrel 15 correspondences, and the interior feather key that forms of keyway that ball fore-set face feather key 11 top feather keys dull and stereotyped 25 inject upper cardan 10 or lower cardan 16 correspondences cooperates; The keyway root cylindrical surface that the sphere 26 at ball fore-set face feather key 11 tops and upper cardan 10 or lower cardan 16 are corresponding is corresponding.This feather key cooperates: the cylinder 25 of ball fore-set face feather key 11 bottoms is inserted in the cylindrical hole of mandrel 15 correspondences, and can rotate in the cylindrical hole of mandrel 15 correspondences, stirs mandrel 15 and rotates to transmit to turn round and refuse and rotating speed, plays the part effect of universal rotation; Play to transmit to turn round in the keyway of dull and stereotyped 25 reeve upper cardans 10 of ball fore-set face feather key 11 top feather keys or lower cardan 16 correspondences and refuse and rotating speed, the face of cylinder of the keyway root of its upper cardan 10 or lower cardan 16 correspondences can be rotated on ball fore-set face feather key 11 top spheres 26 with the same center of circle along ball fore-set face feather key 11 top spheres 26, realizes the universal rotary action of another part; Above-mentioned two parts rotary action just forms whole universal drive shaft effect.The overall work principle is: upper cardan 10, lower cardan 16 be together with ball fore-set face feather key 11, can be on mandrel 15 left-right rotation; Upper cardan 10 and lower cardan 16 can rotate up and down on ball fore-set face feather key 11 and mandrel 15.Two ends up and down on the universal shaft of underground motor, every end are equipped with 4 to 8 groups of ball fore-set face feather keys 11.
As shown in Figure 3, be the structure of corrugated oil sealing.Corrugated oil sealing 14 mainly comprises seal nipple 18, O type circle 19, pressure ring 20, packing element 21 and lower seal joint 22 compositions; Last seal nipple 18 tops are spherical, match with the spherical of sphere cover 13, can rotate up and down with the same center of circle on sphere is overlapped 13 spherical; The internal thread of the screw thread of last seal nipple 18 and upper cardan 10 or lower cardan 16 matches, and the O type circle 19 on it seals up corrugated oil sealing 14 and upper cardan 10 or lower cardan 16; After inside and outside corrugated rubber cover and the bonding extruding of wavy metal enhancement layer, be sulfided into corrugated packing element 21; Packing element 21 and last seal nipple 18, pressure ring 20, the 22 inside and outside bonding extruding of lower seal joint, after packing element and last seal nipple 18, pressure ring 20, lower seal joint 22 are linked together firmly, form corrugated oil sealing 14.
Corrugated oil sealing 14 of universal shaft of underground motor of the present utility model and floating plug 8 have formed the movable sealing to all movable parts in the universal drive shaft, and some O-ring seals form the static seal to all movable parts in the universal drive shaft; The corrugated oil sealing 14 of universal drive shaft, floating plug 8 have formed universal drive shaft two annular seal spaces up and down with some O type circles, fill with resistant to elevated temperatures lubricating grease in the annular seal space; The annular seal space internal pressure that resistant to elevated temperatures lubricating grease is filled with on ground is very little, work as G.I.H, thousands of meters wellbore pressures form huge pressure reduction to annular seal space, at this moment, just by the moving of floating plug 8, corrugated oil sealing 14, the high temperature resistant lubricating grease the compression seal chamber in has carried out the interior pressure compensation of annular seal space, dwindled the pressure reduction between annular seal space internal pressure and the outer surface pressure greatly, and made that the lubricating grease of pressure chamber internal loss is replenished.
Corrugated oil sealing 14, one ends of universal shaft of underground motor of the present utility model are connected with universal joint and upper cardan 10, lower cardan 16 are fused with mandrel 15, have one O type circle that annular seal space is sealed between the two; Corrugated oil sealing 14 other ends are free ends, are enclosed within on the mandrel 15, and can move up and down on mandrel 15, and corrugated oil sealing 14 has O-ring seals between mandrel 15, annular seal space is sealed; The free end of corrugated oil sealing 14 moves under the effect of external pressure inwards, high temperature resistant lubricating grease in the compressible seal chamber, make pressure and the outer pressure maintenance balance of annular seal space in the annular seal space, thereby protected the seal sealing effectiveness, prolonged application life of seal; In addition, the free end of corrugated oil sealing 14 moves under the effect of external pressure inwards, has remedied because the lubricating grease that the motion of each movable part loses in the annular seal space;
The floating plug 8 at universal shaft of underground motor of the present utility model two ends, one section mobile cavity is arranged in upper cardan 10, lower cardan 16, floating plug 8 moves under external pressure inwards, lubricating grease in the compression seal chamber, make pressure and the pressure outside the annular seal space in the annular seal space keep balance, remedied simultaneously because the lubricating grease that the motion of each movable part loses in the annular seal space.
Universal shaft of underground motor plays a part to form a connecting link in whole down-hole motor, its flexibility and project organization directly affect whole down-hole motor transmission and turn round and refuse and the size of rotating speed, and the intensity of motor rotor and power transmission shaft, be related to application life of whole down-hole motor.The universal shaft of underground motor of this utility model, simple in structure, compact, use flexible, reliable, multiple functional, long service life, transmission to turn round and refuse advantages such as big, it is the substitute of petal type universal drive shaft, have than ball-joint formula universal drive shaft intensity height, transmit to turn round and refuse big, structure than characteristic of simple, be suitable for current drilling well required turn round greatly refuse, the rotating speed down-hole motor.
Use down-hole motor and can realize the drilling well of diameter, inclined shaft, extended reach well, horizontal well, Multilateral Wells, fishbone well, improve in the volume increase of oily company and store up; Reduce land occupation, help protecting environment, shorten and see the well cycle, stop or the generation of minimizing accident; Help few input, fecund goes out, and has reduced development cost greatly.It is supporting that universal drive shaft of the present utility model is suitable for the down-hole motor of 100,165,172,197,244 outside dimensions, and the down-hole motor of above-mentioned outside dimension has been included the required scope of application of drilling well substantially.
Claims (8)
1. universal shaft of underground motor, comprise the upper cardan (10), mandrel (15) and the lower cardan (16) that are arranged in the universal drive shaft housing (17), described upper cardan (10) and lower cardan (16) are separately positioned on the two ends of mandrel (15), it is characterized in that: described upper cardan (10) contacts with mandrel (15) by spherical jacking block (9) respectively with lower cardan (16), be equipped with semicircle block key (12) in two ends up and down at mandrel (15), on semicircle block key (12), be provided with spherical cover (13); Periphery at mandrel (15) is provided with corrugated oil sealing (14), and corrugated oil sealing (14) is connected with lower cardan (16) with upper cardan (10), and the spherical of corrugated oil sealing (14) contacts with the sphere of spherical cover (13); Mandrel (15) is provided with ball fore-set face feather key (11), and described ball fore-set face feather key (11) forms feather key with mandrel (15), upper cardan (10) and lower cardan (16) and cooperates.
2. universal shaft of underground motor according to claim 1 is characterized in that: described ball fore-set face feather key (11) comprises cylinder (24), cylinder (24) side's of being provided with plate (25), and the top of described side's plate (25) is sphere (26).
3. universal shaft of underground motor according to claim 1 is characterized in that: described feather key cooperation is: the cylinder (24) of ball fore-set face feather key (11) is arranged on mandrel (15) and goes up in the corresponding cylindrical hole, rotates in the corresponding cylindrical hole of mandrel (15); The square plate (25) of ball fore-set face feather key (11) is arranged on upper cardan (10) or the corresponding keyway of lower cardan (16), the keyway root cylindrical surface that the sphere (26) of ball fore-set face feather key (11) is corresponding with upper cardan (10) or lower cardan (16) matches, and rotate on the sphere of ball fore-set face feather key (11) top with the same center of circle along ball fore-set face feather key (11) top sphere on the face of cylinder of the keyway root that upper cardan (10) or lower cardan (16) are corresponding.
4. according to claim 1 or 3 described universal shaft of underground motor, it is characterized in that: be provided with 4 to 8 groups of ball fore-set face feather keys (11) at the two ends of described mandrel (15).
5. universal shaft of underground motor according to claim 1, it is characterized in that: on described upper cardan (10) and lower cardan (16), be equipped with floating plug (8), between corrugated oil sealing (14) and mandrel (15), be provided with O-ring seals, described floating plug (8) is used the back with O-ring seals and forms universal drive shaft 2 annular seal spaces up and down, is provided with lubricating grease in the sealing chamber.
6. universal shaft of underground motor according to claim 5 is characterized in that: the mobile cavity that is equipped with floating plug (8) on described upper cardan (10) and lower cardan (16).
7. universal shaft of underground motor according to claim 5, it is characterized in that: described corrugated oil sealing (14) is 2, one end of described corrugated oil sealing (14) is a fixed end, the other end is a free end, and described fixed end is connected with upper cardan (10) or lower cardan (16) by screw thread; Described free end moves up and down on mandrel (15).
8. universal shaft of underground motor according to claim 1 or 5, it is characterized in that: described corrugated oil sealing (14) comprises seal nipple (18), O type circle (19), pressure ring (20), packing element (21) and lower seal joint (22); Last seal nipple (18) top is spherical, matches with the spherical of sphere cover (13), is provided with screw thread and matches with the internal thread of upper cardan (10) or lower cardan (16) on last seal nipple (18); Described O type circle (19) seals up corrugated oil sealing (14) and upper cardan (10) or lower cardan (16); To go up the two ends that seal nipple (18) and lower seal joint (22) are fixedly installed on packing element (21) by pressure ring (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202528851U CN201763265U (en) | 2010-07-08 | 2010-07-08 | Underground motor cardan shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202528851U CN201763265U (en) | 2010-07-08 | 2010-07-08 | Underground motor cardan shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201763265U true CN201763265U (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202528851U Expired - Fee Related CN201763265U (en) | 2010-07-08 | 2010-07-08 | Underground motor cardan shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201763265U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906935A (en) * | 2010-07-08 | 2010-12-08 | 扬州天业石油机械有限公司 | Universal shaft of underground motor |
| CN103410444A (en) * | 2013-07-19 | 2013-11-27 | 扬州天业石油机械有限公司 | Waterpower oscillator |
| CN113700758A (en) * | 2020-05-07 | 2021-11-26 | 中国石油天然气集团有限公司 | Universal joint |
| WO2023206943A1 (en) * | 2022-04-28 | 2023-11-02 | 北京金风科创风电设备有限公司 | Floating gear set, speed change device and wind generating set |
-
2010
- 2010-07-08 CN CN2010202528851U patent/CN201763265U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906935A (en) * | 2010-07-08 | 2010-12-08 | 扬州天业石油机械有限公司 | Universal shaft of underground motor |
| CN101906935B (en) * | 2010-07-08 | 2013-03-20 | 扬州天业石油机械有限公司 | Universal shaft of underground motor |
| CN103410444A (en) * | 2013-07-19 | 2013-11-27 | 扬州天业石油机械有限公司 | Waterpower oscillator |
| CN103410444B (en) * | 2013-07-19 | 2015-06-17 | 扬州天业石油机械有限公司 | Waterpower oscillator |
| CN113700758A (en) * | 2020-05-07 | 2021-11-26 | 中国石油天然气集团有限公司 | Universal joint |
| WO2023206943A1 (en) * | 2022-04-28 | 2023-11-02 | 北京金风科创风电设备有限公司 | Floating gear set, speed change device and wind generating set |
| CN117005996A (en) * | 2022-04-28 | 2023-11-07 | 北京金风科创风电设备有限公司 | Floating wheel set, speed change device and wind generating set |
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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: 20110316 Termination date: 20160708 |
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| CF01 | Termination of patent right due to non-payment of annual fee |