CN204663417U - A kind of mud motor sour jujube formula universal drive shaft - Google Patents
A kind of mud motor sour jujube formula universal drive shaft Download PDFInfo
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- CN204663417U CN204663417U CN201520365603.1U CN201520365603U CN204663417U CN 204663417 U CN204663417 U CN 204663417U CN 201520365603 U CN201520365603 U CN 201520365603U CN 204663417 U CN204663417 U CN 204663417U
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- 240000008866 Ziziphus nummularia Species 0.000 title abstract 2
- 238000007789 sealing Methods 0.000 claims description 42
- 238000010276 construction Methods 0.000 claims description 22
- 241001247821 Ziziphus Species 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating Effects 0.000 description 2
- 210000001503 Joints Anatomy 0.000 description 1
- 210000001138 Tears Anatomy 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
A kind of mud motor sour jujube formula universal drive shaft, comprises rotor connection, shaft adapter, connecting axle; It is characterized in that: connecting axle is connected by two groups of driving keys with between rotor connection, shaft adapter; Connecting axle upper end is provided with multiple upper ends keyway, and its trailing flank is circular arc concave surface, bottom surface is plane, and the end face of the projection between adjacent two upper end keyways is the arc surface with connecting axle coaxial line; Rotor connection inner surface is provided with the teeth groove coordinated with upper end keyway; To be the arc surface that protrudes with upper end keyway trailing flank coordinate forms cambered surface and contact for the leading flank of each key block of first group of driving key; Key block bottom surface is plane and forms plane contact with keyway bottom surface, upper end; Key block trailing flank comprises tapered plane and coordinates with rotor connection teeth groove trailing flank and form contact of incline plane; The top width of key block is less than bottom width.Second group of driving key is only that direction is contrary with the set-up mode between connecting axle, shaft adapter.This universal shaft structure is simple, the life-span is long, easy to maintenance.
Description
Technical field
The utility model relates to drilling tool technical field, specifically a kind of mud motor universal drive shaft.
Background technology
Helicoid hydraulic motor is widely used a kind of mud motor in current drilling engineering, be widely used in straight well, directional well, horizontal well, from drillng operations such as the crossing constructions of formula well, well workover, various pipeline.Helicoid hydraulic motor is made up of by-pass valve assembly, motor assembly, universal drive shaft assembly, driving-shaft assembly four major part.
Because motor rotor does planetary motion in the stator, need the fixed-axis rotation by universal drive shaft, planetary motion being converted into power transmission shaft; When helicoid hydraulic motor is applied in directional well, due to the needs of deflecting, articulated joint for screw drilling rod shell has the bent angle of different angles, so universal drive shaft also needs to compensate the bent angle between motor and power transmission shaft.The simultaneously universal drive shaft power transmission that also motor will be produced on power transmission shaft, to drive drill bit rotational and to produce moment of torsion.
The circular cone of the similar handstand of movement locus of universal drive shaft, the power be subject to comprises moment of torsion, axial force and lateral force.Universal drive shaft becomes the part the most easily destroyed in helicoid hydraulic motor.Now general universal drive shaft is petal universal shaft.Petal universal shaft thick-walled pipe is radially cut into intermeshing two points and the petal body do not disconnected, the line of cut closed forms certain interval, the size in gap depends on the size of camber scope, because two lobe intracoelomic cavities bear pressure by ball seat and spheroid, lobe body structure bears the moment of torsion of drilling tool simultaneously.Due to its open architecture, in use the wearing and tearing of lobe seam are very fast, and when gap increases to certain limit, under the effect of drilling tool moment of torsion and pulling force, two lobe bodies are very easily thrown off, and will inevitably cause drilling failure like this.Petal universal shaft is operationally also subject to washing away of high-pressure slurry, and the life-span is very short.Petal universal shaft has been not suitable with the needs of current drilling well at present thus.
Utility model content
In order to overcome the shortcoming that above-mentioned prior art exists, the purpose of this utility model is to provide a kind of mud motor sour jujube formula universal drive shaft, this universal shaft structure is simple, the life-span long, easy to maintenance, various≤4 ° angle can be adapted to change.
In order to solve the problem, the utility model by the following technical solutions: a kind of mud motor sour jujube formula universal drive shaft, comprises rotor connection and the shaft adapter of outputting power of power input; Connecting axle is provided with between rotor connection and shaft adapter; It is characterized in that:
Be connected by first group of driving key between the lower end of described rotor connection and the upper end of connecting axle;
The upper end of described connecting axle around axis uniform be provided with multiple upper ends keyway, the trailing flank of upper end keyway is circular arc concave surface, and the bottom surface of upper end keyway is plane, this bottom surface extend forward and front another upper end keyway trailing flank between form projection; The end face of the projection formed between any two upper end keyways is the arc surface with connecting axle coaxial line;
The inner surface of described rotor connection is provided with multiple teeth groove; The leading flank of teeth groove is tapered plane, parallel with the bottom surface of upper end keyway; The groove end face of teeth groove is arc surface, coordinates with the end face of the projection between adjacent two upper end keyways; The trailing flank of teeth groove is a plane;
Described first group of driving key comprises multiple key block, and the leading flank of each key block is the arc surface protruded, and leading flank and the trailing flank of described upper end keyway of the key block cambered surface forming transmitting torque that matches contacts; The bottom surface of key block is plane and forms plane contact with the bottom surface of upper end keyway; The trailing flank of key block comprises a tapered plane, and this tapered plane coordinates with the trailing flank of the teeth groove of rotor connection and forms contact of incline plane; The top width of key block is less than bottom width;
Be connected by second group of driving key between the lower end of described connecting axle and the upper end of described shaft adapter;
The lower end of described connecting axle around axis uniform be provided with multiple lower ends keyway, the setting direction of lower end keyway is contrary with the setting direction of upper end keyway; The leading flank of lower end keyway is arc surface, and the bottom surface of lower end keyway is plane, forms projection between the leading flank of the lower end keyway that bottom surface extends back and rear side is adjacent; The end face of the projection formed between any two lower end keyways is and connecting axle coaxial line arc surface;
The inner surface of described shaft adapter is provided with multiple teeth groove, the trailing flank of teeth groove is tapered plane, parallel with the bottom surface of lower end keyway, and the groove end face of teeth groove is arc surface, coordinate with the end face of the projection between adjacent two lower end keyways, the leading flank of teeth groove is a plane;
Described second group of driving key comprises multiple key block, and the trailing flank of each key block is the arc surface protruded, and trailing flank and the leading flank of described lower end keyway of the key block cambered surface forming transmitting torque that matches contacts; The bottom surface of key block is plane and the formation plane contact that matches with the bottom surface of lower end keyway; The leading flank of key block comprises a tapered plane, and this tapered plane coordinates with the leading flank of the teeth groove of shaft adapter and forms contact of incline plane; The top width of key block is less than bottom width.
As further technical scheme of the present utility model: at this mud motor sour jujube formula universal drive shaft, on described connecting axle, upper end keyway, lower end keyway quantity are equal, and the key number of blocks of two groups of driving keys is also equal.
Further: the key number of blocks of two groups of described driving keys is 6 pieces.
Further: the vertical distance between the leading flank of the bottom surface of described upper end keyway and the teeth groove of rotor connection is 1-3mm; Vertical distance between the trailing flank of the bottom surface of described lower end keyway and the teeth groove of shaft adapter is 1-3mm.
Further: the upper surface of described connecting axle, lower surface are respectively equipped with a bulb, the centre of sphere of two bulbs is all positioned on the axis of connecting axle; In rotor connection, be provided with concave spherical surface, this concave spherical surface coordinates with the bulb of connecting axle upper end, and this concave spherical surface is concentric with the bulb of connecting axle upper end; In shaft adapter, be also provided with concave spherical surface, this concave spherical surface coordinates with the bulb of connecting axle lower end, and this concave spherical surface is concentric with the bulb of connecting axle lower end.
Further: also to comprise hermetically-sealed construction, hermetically-sealed construction is provided with two groups, and first group of hermetically-sealed construction is arranged on the upper end of connecting axle, for being tightly connected between connecting axle upper end and rotor connection; Second group of hermetically-sealed construction is arranged on the lower end of connecting axle, for being tightly connected between connecting axle lower end and shaft adapter;
Often organize hermetically-sealed construction and include sealing shroud, briquetting, compacting ring, clip; Described sealing shroud is the tubular that flexible material is made; Described briquetting is tubular, comprises cylindrical shell and flanging, described flanging looping draw-in groove in one end of cylindrical shell and between flanging and the external surface of cylindrical shell; Described compacting ring is also tubular, and one end of compacting ring is provided with external screw thread;
The sealing shroud of first group of hermetically-sealed construction, briquetting, compacting ring, clip are designated as the first sealing shroud, the first briquetting, the first compacting ring, the first clip respectively; First briquetting is nested with in connecting axle upper end and is positioned at rotor connection, the upper end of the first sealing shroud snaps in the annular slot of the first briquetting, the threaded upper ends of the first compacting ring is connected to the lower end of rotor connection and the flanging of the first briquetting is pressed in rotor connection by the upper end of the first compacting ring, and the internal diameter of the first briquetting is less than the external diameter of the part connecting axle be positioned at above the first briquetting; The upper end of the first compacting ring and the first briquetting are fixed the upper end of the first sealing shroud jointly; The lower end of the first sealing shroud is fixed on connecting axle by the first clip;
The sealing shroud of second group of hermetically-sealed construction, briquetting, compacting ring, clip are designated as the second sealing shroud, the second briquetting, the second compacting ring, the second clip respectively;
Second briquetting is nested with in connecting axle lower end and is positioned at shaft adapter, the lower end of the second sealing shroud snaps in the annular slot of the second briquetting, the lower end of the second compacting ring is threaded in the upper end of shaft adapter and the flanging of the second briquetting is pressed on shaft adapter by the lower end of the second compacting ring, and the internal diameter of the second briquetting is less than the external diameter of the part connecting axle be positioned at below the second briquetting; And the lower end of the second compacting ring and the second briquetting are fixed the lower end of the second sealing shroud jointly; The upper end of the second sealing shroud is fixed on connecting axle by the second clip.
Further: sealing shroud is made up of oil resistant rubber.
Further: described rotor connection and shaft adapter have oil filler point.
The beneficial effects of the utility model are:
1, transmitting torque is large.Drive disk assembly of the present utility model is all face contact, and under the prerequisite that rotor connection, shaft adapter external diameter remain unchanged, it is larger that connecting axle external diameter can do, can transmitting large torque.
2, long working life.The utility model is hermetically-sealed construction, and each drive disk assembly works under the environment being full of lubricating grease; Each contact surface, all through Surface hardening treatment, weares and teares little under identical applying working condition.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described further:
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the A-A cross-sectional schematic of Fig. 1;
Fig. 3 is the B-B cross-sectional schematic of Fig. 1;
Fig. 4 is the syndeton schematic perspective view (partial cutaway) in Fig. 1 between connecting axle upper end and rotor connection;
Fig. 5 is the annexation schematic diagram in Fig. 1 between connecting axle upper end and rotor connection;
Fig. 6 is the sectional perspective structural representation of connecting axle upper end in Fig. 5;
Fig. 7 is the sectional perspective structural representation of connecting axle upper end in Fig. 5;
Fig. 8 is the perspective view of the key block of first group of driving key in Fig. 4;
Fig. 9 is the perspective view of the key block of first group of driving key in Fig. 4;
Figure 10 is the front view of the key block of first group of driving key in Fig. 4;
Figure 11 is the top view of Figure 10;
Figure 12 is the left view of Figure 10;
Figure 13 is the upward view of Figure 10;
Figure 14 is the right view of Figure 10;
In figure:
1 rotor connection, 11 teeth groove, 111 leading flanks, 112 groove end faces, 113 trailing flanks, 114 concave spherical surfaces, 115 oil filler points,
2 plug wires,
3 first groups of driving keys, 31 key blocks, 311 leading flanks, 312 bottom surfaces, 313 trailing flanks,
4 first briquettings, 5 first compacting rings, 6 first sealing shrouds,
7 connecting axles, 71 upper end keyways, 711 trailing flanks, 712 bottom surfaces, 713 end faces, 72 lower end keyways, 721 leading flanks, 722 bottom surfaces, 723 end faces, bulb on 73,74 times bulbs,
8 second clips,
9 lower ball bases,
10 shaft adapters.101 teeth groove, 1011 trailing flanks, 1012 groove end faces, 1013 leading flanks, 102 concave spherical surfaces, 103 oil filler points,
12 second groups of driving keys, 121 key blocks, 1211 trailing flanks, 1212 bottom surfaces, 1213 leading flanks,
13 second sealing shrouds, 14 second briquettings, 15 second compacting rings, 16 first clips, 17 upper ball bases.
Detailed description of the invention
As shown in Figure 1, this mud motor sour jujube formula universal drive shaft, comprises the rotor connection 1 of power input and the shaft adapter 10 of outputting power; Connecting axle 7 is provided with between two joints.
Be connected by first group of driving key 3 between the lower end of described rotor connection 1 and the upper end of connecting axle 7.
The upper end of described connecting axle 7 around axis uniform be provided with multiple upper ends keyway 71.The trailing flank 711 of upper end keyway 71 is circular arc concave surface.The bottom surface 712 of upper end keyway 71 is plane, this bottom surface 712 extend forward and front another upper end keyway trailing flank between form projection.The end face 713 of the projection formed between any two upper end keyways is the arc surface with connecting axle 7 coaxial line, this arc surface and rotor connection 1 inner hole, and connecting axle 7 can be made to swing along its bulb centre of sphere all the time.
The inner surface of described rotor connection 1 is provided with multiple teeth groove 11; The leading flank 111 of teeth groove is tapered plane, parallel with the bottom surface 712 of upper end keyway 71; The groove end face 112 of teeth groove 11 is arc surface, coordinates with the end face 713 of the projection between adjacent two upper end keyways; The trailing flank 113 of teeth groove 11 is a plane.
As shown in Fig. 2,4,5, described first group of driving key 3 comprises multiple key block 31.As seen in figures 8-14, the leading flank 311 of each key block 31 is the arc surface protruded, and the leading flank 311 of key block 31 and the trailing flank 711 of upper end keyway 71 cambered surface forming transmitting torque that matches contacts.The bottom surface 312 of key block 31 is plane and forms plane contact with the bottom surface 712 of upper end keyway 71.The trailing flank 313 of key block 31 comprises a tapered plane, and this tapered plane coordinates with the trailing flank 113 of the teeth groove 11 of rotor connection and forms contact of incline plane.The top width of key block 31 is less than bottom width."front", "rear" wherein, " on ", D score, " top ", " end " be all relative position relations adopted for convenience of description, do not represent absolute position, do not form the restriction to protection domain.
Be connected by second group of driving key 12 between the lower end of described connecting axle 7 and the upper end of shaft adapter 10.
As shown in Figure 3, the lower end of described connecting axle 7 around axis uniform be provided with multiple lower ends keyway 72, the setting direction of lower end keyway 72 is contrary with the setting direction of upper end keyway 71; The leading flank 721 of lower end keyway 72 is arc surface, and the bottom surface 722 of lower end keyway 72 is plane, forms projection between the leading flank of the lower end keyway that bottom surface 722 extends back and rear side is adjacent; The end face 723 of the projection formed between any two lower end keyways 72 is the arc surface with connecting axle 7 coaxial line.
The inner surface of described shaft adapter 10 is provided with multiple teeth groove 101, the trailing flank 1011 of teeth groove 101 is tapered plane, parallel with the bottom surface 722 of lower end keyway 72, the groove end face 1012 of teeth groove 101 is arc surface, coordinate with the end face 723 of the projection between adjacent two lower end keyways, the leading flank 1013 of teeth groove 101 is a plane.
Described second group of driving key 12 comprises multiple key block 121, and the trailing flank 1211 of each key block 121 is the arc surface protruded, and the trailing flank 1211 of key block 121 and the leading flank 721 of lower end keyway 72 cambered surface forming transmitting torque that matches contacts.The bottom surface 1212 of key block 121 is plane and the formation plane contact that matches with the bottom surface 722 of lower end keyway 72.The leading flank 1213 of key block 121 comprises a tapered plane, and this tapered plane coordinates with the leading flank 1013 of the teeth groove 101 of shaft adapter and forms contact of incline plane; The top width of key block 121 is less than bottom width.
In this embodiment, on described connecting axle 7, upper end keyway 71, lower end keyway 72 quantity are equal, and the key number of blocks of first group of driving key, 3, second group of driving key 12 is also equal.In this embodiment, the key number of blocks of two groups of described driving keys is 6 pieces.
In this embodiment, the vertical distance between the leading flank 111 of the bottom surface 712 of described upper end keyway 71 and the teeth groove 11 of rotor connection 1 is 1-3mm; Vertical distance between the trailing flank 1011 of the bottom surface 722 of described lower end keyway 72 and the teeth groove 101 of shaft adapter 10 is 1-3mm.
In this embodiment, upper surface, the lower surface of described connecting axle 7 are respectively equipped with a bulb, can be designated as bulb 73, lower bulb 74 respectively, as shown in Figure 1; The centre of sphere of two bulbs is all positioned on the axis of connecting axle 7, can ensure that connecting axle and driving key centrally swing, and ensures accuracy, the stable drive of engagement.。In rotor connection 1, be provided with concave spherical surface 114, in this embodiment, concave spherical surface 114 is arranged on upper ball base 17, and upper ball base 17 is fixed in rotor connection 1.The centre of sphere of this concave spherical surface 114 is positioned on the axis of rotor connection 1, and this concave spherical surface 114 coordinates with the upper bulb 73 of connecting axle; In shaft adapter 10, be also provided with concave spherical surface 102, in this embodiment, concave spherical surface 102 is arranged on lower ball base 9, and lower ball base 9 is fixed on shaft adapter 10.The centre of sphere of this concave spherical surface 102 is positioned on the axis of shaft adapter 10, and this concave spherical surface 102 coordinates with the lower bulb 74 of connecting axle 7.Connecting axle and bulb are one, can improve machining accuracy, improve the accuracy of rotating.
Inner in order to prevent drilling fluid from entering spline universal drive shaft, this sour jujube formula universal drive shaft also comprises hermetically-sealed construction, and described hermetically-sealed construction is provided with two groups, and first group of hermetically-sealed construction is arranged on the upper end of connecting axle 7, for being tightly connected between connecting axle 7 upper end and rotor connection 1; Second group of hermetically-sealed construction is arranged on the lower end of connecting axle 7, for being tightly connected between connecting axle 7 lower end and shaft adapter 10.
Often organize hermetically-sealed construction and include sealing shroud, briquetting, compacting ring, clip.Wherein sealing shroud is the tubular that flexible material is made; Described briquetting is tubular, comprises cylindrical shell and flanging, described flanging looping draw-in groove in one end of cylindrical shell and between flanging and the external surface of cylindrical shell; Described compacting ring is also tubular, and one end of compacting ring is provided with external screw thread.
The sealing shroud of first group of hermetically-sealed construction, briquetting, compacting ring, clip are designated as the first sealing shroud 6, first briquetting 4, first compacting ring 5, first clip 16 respectively.
First briquetting 4 is nested with in connecting axle upper end and is positioned at rotor connection 1, the upper end of the first sealing shroud 6 snaps in the annular slot of the first briquetting 4, the threaded upper ends of the first compacting ring 5 is connected to the lower end of rotor connection 1 and the flanging of the first briquetting 4 is pressed in rotor connection 1 by the upper end of the first compacting ring 5, the internal diameter of the first briquetting 4 is less than the external diameter of the part connecting axle 7 be positioned at above the first briquetting, can limit the axial displacement of connecting axle 7.The upper end of the first compacting ring 5 and the first briquetting 4 are fixed the upper end of the first sealing shroud 6 jointly; The lower end of the first sealing shroud 6 is fixed on connecting axle 7 by the first clip 16.
The sealing shroud of second group of hermetically-sealed construction, briquetting, compacting ring, clip are designated as the second sealing shroud 13, second briquetting 14, second compacting ring 15, second clip 8 respectively.
Second briquetting 14 is nested with in connecting axle 7 lower end and is positioned at shaft adapter 10, the lower end of the second sealing shroud 13 snaps in the annular slot of the second briquetting 14, the lower end of the second compacting ring 15 is threaded in the upper end of shaft adapter 10 and the flanging of the second briquetting 14 is pressed on shaft adapter 10 by the lower end of the second compacting ring 15, the internal diameter of the second briquetting 14 is less than the external diameter of the part connecting axle 7 be positioned at below the second briquetting, can limit the axial displacement of connecting axle; And the lower end of the second compacting ring 15 and the second briquetting 14 are fixed the lower end of the second sealing shroud 13 jointly; The upper end of the second sealing shroud 13 is fixed on connecting axle 7 by the second clip 8.
In this embodiment, the first sealing shroud 6, second sealing shroud 13 is made by oil resistant rubber.
In this embodiment, described rotor connection 1 is provided with oil filler point 115, shaft adapter 10 also has oil filler point 103.In oil filler point 103,115, lubricating grease is injected, between the teeth groove of guarantee driving key and rotor connection, the teeth groove of shaft adapter after drill set dress; Always work between bulb and ball seat in lubrication environment.
Oil filler point 115,103 is provided with plug wire 2.
During work, the power that motor produces is delivered in rotor connection 1 by motor rotor, and rotor connection 1 passes through first group of driving key 3 by power transmission to connecting axle 7, and connecting axle 7 passes to shaft adapter 10 by second group of driving key 12 again.Being contact of incline plane between rotor connection 1, shaft adapter 10 with the key block coordinated separately, is that plane contacts with the cambered surface of radius such as grade between connecting axle 7 with key block.
Operationally first group of driving key, second group of driving key rotate along cambered surface contact position, not only can compensate the eccentric motion of helicoid hydraulic motor rotor and the bent angle of universal drive shaft, can also ensure rotor connection (shaft adapter) with driving key, remain between connecting axle with driving key that face contacts, this just greatly improves moment of torsion that universal drive shaft can bear, significantly extends its application life.
In addition to such a technique, after the rotor connection in this embodiment, shaft adapter, ball seat, bulb adopt carburizing or Nitrizing Treatment, not only more wear-resisting, more high pulling torque can also be transmitted.
Above an embodiment of the present utility model has been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to utility model application scope change and improve, and all should belong within the protection domain contained of the present utility model.
Claims (8)
1. a mud motor sour jujube formula universal drive shaft, comprises the rotor connection of power input and the shaft adapter of outputting power; Connecting axle is provided with between rotor connection and shaft adapter; It is characterized in that:
Be connected by first group of driving key between the lower end of described rotor connection and the upper end of connecting axle;
The upper end of described connecting axle around axis uniform be provided with multiple upper ends keyway, the trailing flank of upper end keyway is circular arc concave surface, and the bottom surface of upper end keyway is plane, this bottom surface extend forward and front another upper end keyway trailing flank between form projection; The end face of the projection formed between any two upper end keyways is the arc surface with connecting axle coaxial line;
The inner surface of described rotor connection is provided with multiple teeth groove; The leading flank of teeth groove is tapered plane, parallel with the bottom surface of upper end keyway; The groove end face of teeth groove is arc surface, coordinates with the end face of the projection between adjacent two upper end keyways; The trailing flank of teeth groove is a plane;
Described first group of driving key comprises multiple key block, and the leading flank of each key block is the arc surface protruded, and leading flank and the trailing flank of described upper end keyway of the key block cambered surface forming transmitting torque that matches contacts; The bottom surface of key block is plane and forms plane contact with the bottom surface of upper end keyway; The trailing flank of key block comprises a tapered plane, and this tapered plane coordinates with the trailing flank of the teeth groove of rotor connection and forms contact of incline plane; The top width of key block is less than bottom width;
Be connected by second group of driving key between the lower end of described connecting axle and the upper end of described shaft adapter;
The lower end of described connecting axle around axis uniform be provided with multiple lower ends keyway, the setting direction of lower end keyway is contrary with the setting direction of upper end keyway; The leading flank of lower end keyway is arc surface, and the bottom surface of lower end keyway is plane, forms projection between the leading flank of the lower end keyway that bottom surface extends back and rear side is adjacent; The end face of the projection formed between any two lower end keyways is and connecting axle coaxial line arc surface;
The inner surface of described shaft adapter is provided with multiple teeth groove, the trailing flank of teeth groove is tapered plane, parallel with the bottom surface of lower end keyway, and the groove end face of teeth groove is arc surface, coordinate with the end face of the projection between adjacent two lower end keyways, the leading flank of teeth groove is a plane;
Described second group of driving key comprises multiple key block, and the trailing flank of each key block is the arc surface protruded, and trailing flank and the leading flank of described lower end keyway of the key block cambered surface forming transmitting torque that matches contacts; The bottom surface of key block is plane and the formation plane contact that matches with the bottom surface of lower end keyway; The leading flank of key block comprises a tapered plane, and this tapered plane coordinates with the leading flank of the teeth groove of shaft adapter and forms contact of incline plane; The top width of key block is less than bottom width.
2. a kind of mud motor according to claim 1 sour jujube formula universal drive shaft, is characterized in that: on described connecting axle, and upper end keyway, lower end keyway quantity are equal, and the key number of blocks of two groups of driving keys is also equal.
3. a kind of mud motor according to claim 1 sour jujube formula universal drive shaft, is characterized in that: the key number of blocks of two groups of described driving keys is 6 pieces.
4. a kind of mud motor according to claim 1 sour jujube formula universal drive shaft, is characterized in that: the vertical distance between the leading flank of the bottom surface of described upper end keyway and the teeth groove of rotor connection is 1-3mm; Vertical distance between the trailing flank of the bottom surface of described lower end keyway and the teeth groove of shaft adapter is 1-3mm.
5., according to the arbitrary described a kind of mud motor sour jujube formula universal drive shaft of claim 1-4, it is characterized in that: the upper surface of described connecting axle, lower surface are respectively equipped with a bulb, the centre of sphere of two bulbs is all positioned on the axis of connecting axle; In rotor connection, be provided with concave spherical surface, this concave spherical surface coordinates with the bulb of connecting axle upper end, and this concave spherical surface is concentric with the bulb of connecting axle upper end; In shaft adapter, be also provided with concave spherical surface, this concave spherical surface coordinates with the bulb of connecting axle lower end, and this concave spherical surface is concentric with the bulb of connecting axle lower end.
6. a kind of mud motor according to claim 5 sour jujube formula universal drive shaft, it is characterized in that: also comprise hermetically-sealed construction, hermetically-sealed construction is provided with two groups, and first group of hermetically-sealed construction is arranged on the upper end of connecting axle, for being tightly connected between connecting axle upper end and rotor connection; Second group of hermetically-sealed construction is arranged on the lower end of connecting axle, for being tightly connected between connecting axle lower end and shaft adapter;
Often organize hermetically-sealed construction and include sealing shroud, briquetting, compacting ring, clip; Described sealing shroud is the tubular that flexible material is made; Described briquetting is tubular, comprises cylindrical shell and flanging, described flanging looping draw-in groove in one end of cylindrical shell and between flanging and the external surface of cylindrical shell; Described compacting ring is also tubular, and one end of compacting ring is provided with external screw thread;
The sealing shroud of first group of hermetically-sealed construction, briquetting, compacting ring, clip are designated as the first sealing shroud, the first briquetting, the first compacting ring, the first clip respectively; First briquetting is nested with in connecting axle upper end and is positioned at rotor connection, the upper end of the first sealing shroud snaps in the annular slot of the first briquetting, the threaded upper ends of the first compacting ring is connected to the lower end of rotor connection and the flanging of the first briquetting is pressed in rotor connection by the upper end of the first compacting ring, and the internal diameter of the first briquetting is less than the external diameter of the part connecting axle be positioned at above the first briquetting; The upper end of the first compacting ring and the first briquetting are fixed the upper end of the first sealing shroud jointly; The lower end of the first sealing shroud is fixed on connecting axle by the first clip;
The sealing shroud of second group of hermetically-sealed construction, briquetting, compacting ring, clip are designated as the second sealing shroud, the second briquetting, the second compacting ring, the second clip respectively;
Second briquetting is nested with in connecting axle lower end and is positioned at shaft adapter, the lower end of the second sealing shroud snaps in the annular slot of the second briquetting, the lower end of the second compacting ring is threaded in the upper end of shaft adapter and the flanging of the second briquetting is pressed on shaft adapter by the lower end of the second compacting ring, and the internal diameter of the second briquetting is less than the external diameter of the part connecting axle be positioned at below the second briquetting; And the lower end of the second compacting ring and the second briquetting are fixed the lower end of the second sealing shroud jointly; The upper end of the second sealing shroud is fixed on connecting axle by the second clip.
7. a kind of mud motor according to claim 6 sour jujube formula universal drive shaft, is characterized in that: sealing shroud is made up of oil resistant rubber.
8. the sour jujube formula universal drive shaft of a kind of mud motor according to claim 6 or 7, is characterized in that: described rotor connection and shaft adapter have oil filler point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520365603.1U CN204663417U (en) | 2015-06-01 | 2015-06-01 | A kind of mud motor sour jujube formula universal drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520365603.1U CN204663417U (en) | 2015-06-01 | 2015-06-01 | A kind of mud motor sour jujube formula universal drive shaft |
Publications (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863523A (en) * | 2015-06-01 | 2015-08-26 | 德州联合石油机械有限公司 | Ratchet type universal shaft for downhole power drill tool |
| CN110945205A (en) * | 2017-07-27 | 2020-03-31 | 涡轮钻具工业公司 | Articulated universal joint with backlash reduction |
-
2015
- 2015-06-01 CN CN201520365603.1U patent/CN204663417U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863523A (en) * | 2015-06-01 | 2015-08-26 | 德州联合石油机械有限公司 | Ratchet type universal shaft for downhole power drill tool |
| CN110945205A (en) * | 2017-07-27 | 2020-03-31 | 涡轮钻具工业公司 | Articulated universal joint with backlash reduction |
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