CN118346164B - Drill rod power head - Google Patents
Drill rod power head Download PDFInfo
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- CN118346164B CN118346164B CN202410535230.1A CN202410535230A CN118346164B CN 118346164 B CN118346164 B CN 118346164B CN 202410535230 A CN202410535230 A CN 202410535230A CN 118346164 B CN118346164 B CN 118346164B
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- sleeve
- output shaft
- cover
- gear
- power head
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- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 230000009467 reduction Effects 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 2
- 210000000078 claw Anatomy 0.000 abstract 3
- 238000005553 drilling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
本公开提供一种钻杆动力头，包括驱动机构、减速机构、输出轴机构和夹紧机构，夹紧机构包括伸缩部、压力缸和夹爪，芯盖设置在外罩内，并且可沿轴向相对于输出轴自由移动，芯盖一端与底盖之间设置有弹簧，另一端与顶盖、活塞抵紧，在夹紧状态下，弹簧的弹性力克服压力流体的压力将芯盖压紧在第一位置，从而使芯盖推动夹爪夹紧钻杆，在松脱状态下，压力流体的压力克服弹簧的弹性力将芯盖压紧在第二位置，从而使芯盖释放夹爪松脱钻杆。根据本公开，简化了动力头的结构尺寸，提高动力头转动稳定性，保证钻杆夹紧操作安全性。
The present disclosure provides a drill pipe power head, including a driving mechanism, a speed reduction mechanism, an output shaft mechanism and a clamping mechanism, wherein the clamping mechanism includes a telescopic part, a pressure cylinder and a clamping claw, a core cover is arranged in an outer cover and can freely move relative to the output shaft in the axial direction, a spring is arranged between one end of the core cover and the bottom cover, and the other end is pressed against the top cover and the piston, in the clamping state, the elastic force of the spring overcomes the pressure of the pressure fluid to press the core cover in the first position, so that the core cover pushes the clamping claw to clamp the drill pipe, and in the loosening state, the pressure of the pressure fluid overcomes the elastic force of the spring to press the core cover in the second position, so that the core cover releases the clamping claw to loosen the drill pipe. According to the present disclosure, the structural size of the power head is simplified, the rotation stability of the power head is improved, and the safety of the drill pipe clamping operation is ensured.
Description
Technical Field
The disclosure relates to the field of engineering drilling, in particular to a drill rod power head.
Background
The drill rod power head is used for a working and exploration drilling machine and an underground drilling machine, and the drill rod power head is used for clamping and driving the drill rod to rotate for drilling. When a drill bit is pulled out from a drilled hole after the traditional drill rod power head is finished, the clamping function of the power head is lost due to an engine or other faults, so that the drill rod slides down in a well, and a waste hole phenomenon occurs. In order to solve the problem, the prior art adopts a technical scheme of spring clamping and hydraulic driving loosening, for example, patent (CN202123059544. X) discloses a hydraulic clamp holder for a drill rod, and the elastic pressure of a nitrogen spring is used as the clamping force for clamping the drill rod, so that the elastic pressure can avoid the drill rod from loosening even if an engine or a hydraulic system fails. However, the distributed arrangement of the hydraulic cylinders causes the increase of the size and the complex structure of the power head, and the actions of the hydraulic cylinders are easy to be inconsistent, which is not beneficial to the use of engineering drilling construction.
On the other hand, the speed reduction structure of the drill rod power head is also an important technology of the industry, and the traditional drill rod power head adopts the speed reduction structure in which the hydraulic motor and the drill rod are coaxially arranged, such as a planetary gear speed reduction structure, so that the length of the power head is unnecessarily increased, and the construction and the use are not facilitated. In order to solve the problem, the prior art adopts a gear reduction structure in which a motor and a drill rod are arranged side by side. However, in practical use, the rotation center line of the drill rod is often deviated, so that the phenomena of overlarge vibration and drill rod clamping in the construction process are caused.
Disclosure of Invention
The present disclosure provides a drill pipe power head.
Specifically, the present disclosure is implemented by the following technical scheme:
The embodiment of the disclosure provides a drill pipe power head, comprising:
A driving mechanism;
The speed reducing mechanism is provided with a first gear, and the first gear is in transmission connection with the driving mechanism;
The output shaft mechanism is provided with an output shaft and a second gear, the output shaft and the second gear integrally rotate, and the second gear is meshed with the first gear so as to be suitable for the driving mechanism to be in transmission connection with the output shaft through the first gear and the second gear;
the clamping mechanism is arranged at the periphery of the output shaft mechanism and integrally rotates with the output shaft mechanism, and the clamping mechanism comprises:
A jaw disposed at an outer periphery of the output shaft and freely movable in a radial direction with respect to the output shaft;
The telescopic part is arranged at the periphery of the clamping jaw, at least one movable body capable of freely moving along the axial direction is arranged in the telescopic part, and a spring used for compressing the movable body is arranged in the telescopic part;
The pressure cylinder is arranged on the periphery of the output shaft and is provided with a cylinder body and a piston, the piston is sleeved on the periphery of the output shaft in a cylindrical shape, and two ends of the piston are respectively contacted with pressure fluid and a movable body of the telescopic part;
The inner peripheral side of the movable body of the telescopic part and/or the outer peripheral side of the clamping jaw form a wedge surface, so that in a clamping state, the elastic force of the spring overcomes the pressure of the pressure fluid to press the movable body to a first position, so that the movable body pushes the clamping jaw to clamp a drill rod, and in a loosening state, the pressure of the pressure fluid overcomes the elastic force of the spring to press the movable body to a second position, so that the movable body releases the clamping jaw to loosen the drill rod.
In some embodiments, the telescopic part further comprises a bottom cover, the bottom cover is arranged at the bottom end of the output shaft, and the movable body is provided with an integrally moving outer cover and a top cover.
In some embodiments, the top cover is formed with an upwardly extending neck, the neck is sleeved on the periphery of the output shaft, the piston is sleeved on the periphery of the neck, wherein a protruding portion is further formed on the top of the top cover, when the moving body is at least in the first position, the protruding portion is limited on the inner side of the cylinder body, and the top end of the top cover is limited on the bottom end of the cylinder body.
In some embodiments, the output shaft mechanism further comprises a shaft sleeve and a spacer, the pressure cylinder further comprises a cylinder cover, the output shaft mechanism further comprises a shaft sleeve, the shaft sleeve is provided with a bearing, the top end of the cylinder cover is abutted against the bottom end of the shaft sleeve, and a sealing ring is arranged on the inner periphery of the cylinder cover.
In some embodiments, the output shaft mechanism further includes a shaft sleeve, the shaft sleeve is provided with a first bearing set and a second bearing set in sequence from top to bottom, the second gear is located between the first bearing set and the second bearing set, the first bearing set is a pair of single-row centripetal opposite conical roller bearings, and the second bearing set is a cylindrical roller bearing.
In some embodiments, a first distance is formed between the first bearing set and the second bearing set, a second distance is formed between the second bearing set and the clamping jaw, and the ratio of the first distance to the second distance is 2:3.
In some embodiments, the speed reducing mechanism further includes a speed reducing sleeve, an axle, and a pair of ball bearings disposed on the axle, the pair of ball bearings being supported at both ends of the first gear, respectively, the pair of ball bearings being at least partially overlapped with the first bearing set and the second bearing set, respectively, in an axial direction.
In some embodiments, the shaft sleeve comprises a first shaft sleeve and a second shaft sleeve, the first shaft sleeve and the second shaft sleeve are respectively provided with a first bearing group and a second bearing group, the speed reduction sleeve comprises a first speed reduction sleeve and a second speed reduction sleeve, the first speed reduction sleeve and the second speed reduction sleeve are respectively provided with a pair of ball bearings, the first shaft sleeve and the first speed reduction sleeve are integrally formed, and the second shaft sleeve and the second speed reduction sleeve are integrally formed.
In some embodiments, the speed reducing mechanism further comprises a driving sleeve, the bottom end of the driving sleeve is connected with the first speed reducing sleeve, the bottom end of the driving sleeve abuts against the ball bearing, and a coupling structure between the driving device and the wheel shaft is arranged in the driving sleeve.
In some embodiments, the movable body of the telescopic part further comprises a core cover, the core cover is arranged at the bottom of the top cover, and the spring is arranged between the core cover and the bottom cover.
According to the embodiment of the disclosure, the piston of the pressure cylinder for introducing pressure fluid is arranged to be sleeved on the periphery of the output shaft in a cylindrical manner, two ends of the piston are respectively contacted with the pressure fluid and the movable body of the telescopic part, and the inner periphery of the piston can be integrally and uniformly guided and supported in the axial movement process of the piston, so that the piston is stably moved under the action of the pressure difference of the spring and the pressure fluid, the movable body of the telescopic part is ensured to stably and synchronously move by pushing the clamping jaw through the wedge surface, the structure of the clamping mechanism is simplified, and the installation and maintenance are convenient.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic illustration of a drill pipe power head in an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of a drill pipe power head in an embodiment of the present disclosure;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a partial enlarged view at B in FIG. 2;
FIG. 5 is an enlarged view of a portion of FIG. 2 at C;
fig. 6 is a partial enlarged view at D in fig. 2.
Reference numerals:
100, a driving mechanism;
200 parts of a speed reducing mechanism, 210 parts of a first gear, 220 parts of a wheel shaft, 230 parts of a ball bearing, 241 parts of a first speed reducing sleeve, 242 parts of a second speed reducing sleeve and 250 parts of a driving sleeve;
300 parts of output shaft mechanism, 310 parts of output shaft, 320 parts of second gear, 330 parts of first shaft sleeve, 331 parts of first bearing set, 340 parts of second shaft sleeve, 341 parts of second bearing set, 350 parts of end sleeve, 360 parts of end cover, 370 parts of nut and 380 parts of sealing sleeve;
400 clamping mechanism, 410 clamping jaw, 420 telescopic part, 421 outer cover, 422 bottom cover, 423 top cover, 4231 neck, 4232 protruding part, 424 core cover, 430 pressure cylinder, 431 cylinder, 432 piston, 433 cylinder cover, 440 spring;
500 parts of drill rod.
Detailed Description
The present disclosure will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only in order to enable a person of ordinary skill in the art to better understand and thus practice the present disclosure, and are not meant to imply any limitation on the scope of the present disclosure.
As used herein, the terms "comprises," comprising, "and variants thereof are to be construed as meaning" including but not limited to "open-ended terms," the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment," the term "another embodiment" is to be interpreted as "at least one other embodiment," the terms "first," "second," etc. may refer to different or the same objects, and the term "set up" is not limited to direct or indirect connections nor to a particular manner of connection. Other explicit and implicit definitions are also possible below.
Some specific values or ranges of values may be referred to in the following description. It should be understood that these numerical values and numerical ranges are merely exemplary, which may be advantageous to put the concepts of the present disclosure into practice. However, the description of these examples is not intended to limit the scope of the present disclosure in any way. These values or ranges of values may be set otherwise, depending on the particular application and requirements.
As described above, the clamping mechanism 400 of the power head of the drill pipe 500 in the prior art has a complex structure and oversized power head, and the arrangement of the speed reducing structure causes excessive vibration and easy well blockage during the construction process of the drill pipe 500. The drill pipe 500 powerhead presented by embodiments of the present disclosure at least partially addresses the above-described problems. The structure and operation of the drill pipe 500 power head according to an example embodiment of the present disclosure will be described below with reference to fig. 1 to 6. As shown in fig. 1-2, the drill rod 500 power head of the embodiment of the present disclosure generally includes a driving mechanism 100, a speed reducing mechanism 200, an output shaft mechanism 300, a clamping mechanism 400, and a drill rod 500, wherein the driving mechanism 100 is used for providing rotational torque, the speed reducing mechanism 200 is used for reducing the rotational torque and transmitting the rotational torque to the output shaft 310, the output shaft mechanism 300 is used for driving the drill rod 500 to output rotation, and the clamping mechanism 400 is used for clamping and releasing the drill rod 500.
The driving mechanism 100 may be a motor, a hydraulic motor or a pneumatic motor, and the rotational torque is coaxially transmitted to the wheel shaft 220 of the reduction mechanism 200 through a coupling, and the two are coaxially arranged, so that the radial size of the power head can be ensured, and the eccentric vibration of the driving device and the reduction mechanism 200 caused by the rotation of the drill pipe 500 can be reduced.
The speed reducing mechanism 200 includes an axle 220, a first gear 210, a speed reducing sleeve, and a pair of ball bearings 230, wherein the first gear 210 is disposed on the axle 220, the axle 220 is coaxially connected with an output shaft 310 of the driving mechanism 100 through a coupling, the pair of ball bearings 230 are disposed on the axle 220 and located at two ends of the first gear 210, and the speed reducing sleeve is used for supporting the axle 220 through the pair of ball bearings 230 to drive the first gear 210 to rotate.
The output shaft mechanism 300 mainly includes an output shaft 310, a second gear 320, and a sleeve, where the second gear 320 and the sleeve are both sleeved on the outer periphery of the output shaft and rotate integrally with the output shaft 310. Wherein the second gear 320 is adapted to mesh with the first gear 210, thereby transmitting the rotation of the axle 220 to the output shaft.
The second gear 320 is located axially of the output shaft in the top half of the length of the output shaft and near the midpoint of the length of the output shaft. So set up, because clamping mechanism 400 is located the bottom half section of output shaft, make second gear 320 be close to clamping mechanism 400 as far as possible, the atress direction of work progress output shaft in second gear 320 department is opposite with clamping mechanism 400 department to reduce the torsion that the output shaft bore between two places, avoid the output shaft to take place torsional deformation. In one embodiment, the axial length of the output shaft is L, and the second gear 320 is located at 0.4L from the top end of the output shaft, while the arrangement space of the first bearing group 331 and the second bearing group 341 can be satisfied.
The clamping mechanism 400 is integrally sleeved on the periphery of the output shaft, so that the structure is compact and the clamping action is stable. Specifically, the clamping mechanism 400 includes a clamping jaw 410, a telescopic portion 420 and a pressure cylinder 430, wherein the clamping jaw 410 is disposed at the periphery of the output shaft, and an opening is formed in the output shaft 310 at the mounting position of the clamping jaw 410, so as to allow the clamping jaw 410 to extend into the output shaft 310 in a radial direction through the opening to clamp the drill rod 500.
The expansion part 420 can be extended or shortened along the axial dimension, and during the extension or shortening process, the wedge surface structure contacted between the movable body of the expansion part 420 and the clamping jaw 410 is utilized to realize radial movement of the clamping jaw 410, so as to clamp and release the drill rod 500. The telescopic part 420 is disposed at the outer periphery of the clamping jaw 410, and in order to achieve the above function, in one embodiment, the telescopic part 420 is at least provided with a movable body capable of freely moving along the axial direction, and the spring 440 is disposed between the movable body and the stationary structure of the telescopic part 420. In another embodiment, the telescopic parts 420 at both ends of the spring 440 may be movable.
In one embodiment, the telescopic part 420 includes a top cover 423, a cover 421 and a bottom cover 422, the cover 421 is integrally formed in a sleeve shape, the bottom cover 422 and the top cover 423 are respectively arranged at two ends of the sleeve, so that the telescopic part 420 and the output shaft together form a chamber, the chamber accommodates the clamping jaw 410 and the core cover 424 of the telescopic part 420, and the cover 421, the cover 423, the bottom cover 422, the core cover 424 and the clamping jaw 410 integrally rotate along with the output shaft 310.
In one embodiment, the telescopic part 420 may not be provided with the core cover 424, only the part formed by the top cover 423 and the outer cover 421 moves integrally, the bottom cover 422 is fixed on the output shaft 310 through the connecting piece, the spring 440 is disposed between the top cover 423 and the bottom cover 422, the top cover 423 is formed with a structure extending downwards, and the wedge surface on the structure is used to cooperate with the clamping jaw 410.
In another embodiment, the telescoping portion 420 is provided with a core cap 424, with springs 440 disposed between the bottom caps 422 of the core caps 424, the core cap 424 extending downwardly in a cylindrical configuration within a peripherally disposed spring 440, the cylindrical configuration having a wedge-shaped inner periphery. The wedge surface may be a continuous ramp or a segmented ramp as shown. By providing the core cap 424, the core cap 424 is more stable in contact with the spring 440, the spring 440 can also be laterally supported by the downwardly extending barrel structure, and the wedge structure is integrally formed with the moving core cap 424, improving the stability of the transfer between axial movement and radial movement of the jaws 410.
The springs 440 are uniformly distributed around the output shaft in the circumferential direction, so that a uniform elastic force is provided for the core cover 424 in the circumferential direction, the core cover 424 is always pressed upwards by the elastic force of the springs 440 in a normal state, the core cover 424 (or the top cover 423) is in the first position, and since the periphery of the clamping jaw 410 is formed with an inclined plane, an elastic component (or no elastic component) for providing a radial outward elastic force is also arranged between the clamping jaw 410 and the output shaft (or no elastic component is provided, and the inclined plane of the clamping jaw 410 can be always pressed on the inner peripheral structure of the core cover 424 by manual operation of an operator). In a conventional state, the core cap 424 pushes the grip jaw 410 to grip the drill rod 500 by the inclined surface, so that there is no fear of loosening the drill rod 500 due to malfunction of the engine or the like. Because the core cover 424 is directly arranged on the outer cover 421, namely the outer cover 421 is directly sleeved on the periphery of the output shaft, the structure is simple, the components are few, excessive vibration and eccentricity can be avoided in the rotation process of the output shaft, the maintenance and the disassembly of the power head are convenient, and the maintenance or the disassembly of the components such as the core cover 424, the spring 440, the clamping jaw 410 and the like can be carried out only by disassembling the main cylinder sleeve.
In another embodiment, the outer circumference of the clamping jaw 410 may also be planar, while the inner circumference of the core cap 424 is beveled, so long as the axial movement of the core cap 424 is translated into radial movement of the clamping jaw 410.
The top end of the top cover 423 is abutted with the bottom end of the piston 432, the top end of the piston 432 is provided with a chamber communicated with oil, and the piston 432 is pushed by the oil pressure so as to push the top cover 423 and the core cover 424 to move. So that when the drill rod 500 needs to be released, external oil flows into the enclosed space through the opening, the cylinder core is pushed by the hydraulic pressure to move downwards to the second position against the elastic force in the enclosed space, the inclined surface between the core cover 424 and the clamping jaw 410 is released, and the clamping jaw 410 is pushed by the elastic component to move outwards in the radial direction, so that the drill rod 500 is released.
In one embodiment, the pressure cylinder 430 is provided with a cylinder body 431, a piston 432 and a cylinder cover 433, the piston 432 is cylindrically sleeved on the periphery of the output shaft, and two ends of the piston 432 are respectively used for contacting oil and the top cover 423. The inner circumference side of the top cover 423 is provided with the neck 4231 extending upwards, the neck 4231 is wrapped on the outer circumference of the output shaft, and the guiding supporting effect between the top cover 423 and the output shaft is increased through the cooperation of the neck 4231 and the outer circumference of the output shaft, so that the moving stability of the top cover 423 is improved. On the other hand, the piston 432 is sleeved on the outer periphery of the neck 4231, so that radial support between the piston 432 and the neck 4231 of the top cover 423 is improved, and overall strength and stability are improved.
In one embodiment, the top of the top cover 423 is further formed with a protruding portion 4232, where the protruding portion 4232 is used to cooperate with the inner side of the cylinder 431 near the first position, so as to improve the moving stability of the top cover 423, and when in the first position, the bottom end of the cylinder 431 just can abut against the top end of the top cover 423, so that the cylinder 431 and the top cover 423 have a supporting relationship in the axial direction and the radial direction.
In one embodiment, the output shaft mechanism 300 further comprises a shaft sleeve for mounting a bearing, the cylinder cover 433 is arranged between the shaft sleeve and the cylinder body 431 at intervals and is respectively abutted against the shaft sleeve and the cylinder body 431, on one hand, manufacturing and mounting errors of the shaft sleeve and the cylinder body 431 are eliminated through the cylinder cover 433, and on the other hand, a sealing ring at the inner periphery of the cylinder cover 433 prevents oil from leaking between the shaft sleeve and the pressure cylinder 430.
The output shaft mechanism 300 further includes a sleeve, which in one embodiment is made separately from the first sleeve 330 and the second sleeve 340, the first sleeve 330 having the first bearing set 331 mounted therein, the second sleeve 340 having the second bearing set 341 mounted therein, and the first sleeve 330 and/or the second sleeve 340 providing a mounting space for the second gear 320 therein. In another embodiment, the sleeve may also be integrally formed.
In one embodiment, the first bearing set 331 is a pair of single-row centripetally opposite conical roller bearings, the second bearing set 341 is a cylindrical roller bearing, the drill pipe 500 mainly bears bending force and bidirectional axial force from the bottom end of the drill pipe 500 in the construction process, the conical roller bearings can provide bidirectional axial bearing, radial load generated by the bending force can be borne to a certain extent, and the cylindrical roller bearings are arranged to mainly bear radial load borne by the output shaft.
In one embodiment, the second bearing set 341 is disposed at a midpoint area of the length of the output shaft, and the present disclosure finds that the midpoint area is subjected to the greatest radial load according to the conventional clearance between the drill pipe 500 and the output shaft, and the second bearing set 341 is disposed to efficiently solve the radial load bearing problem.
In one embodiment, the position of the first bearing set 331 and the position of the clamping mechanism 400 are adjusted about the midpoint of the second bearing set 341, respectively, so that the output shaft has a stable balanced operating condition in the axial direction. Specifically, the distance between the second bearing group 341 and the first bearing group 331, and the distance between the first bearing group 331 and the clamping mechanism 400 are set to be 2:3. It should be noted that the position of the bearing set is defined by the midpoint of the axial dimension of the bearing set, and the position of the clamping mechanism 400 is defined by the midpoint of the axial dimension of the clamping jaw 410 in clamping contact with the drill rod 500.
In one embodiment, each ball bearing 230 of the reduction mechanism 200 at least partially overlaps the first bearing set 331 or the second bearing set 341 in the axial direction of the output shaft, and since the reduction sleeve and the sleeve are tightly fitted or integrally formed with each other, the overlapping arrangement between the bearings can make the reduction sleeve and the sleeve mutually offset a part of the load bearing load on the bearings, i.e., increase the defects caused by arranging the reduction structures side by side.
Specifically, since the first gear 210 is meshed with the second gear 320, compared to the coaxial reduction mode, the torque borne by the output shaft is increased, and accordingly, the bending force borne by the output shaft is also increased, and the radial offset is generated during the rotation of the output shaft and thus the wheel axle 220 due to the bending force, which has proved difficult to solve in the existing bearing system. According to the embodiment of the disclosure, the bearings have overlapping areas in the axial direction, and the problem can be solved under the conditions that the number of the bearings is not increased and the strength of the shaft sleeve and the speed reducing sleeve is not changed, so that a new design idea is provided.
It should be noted that, the bearing overlapping design manner of the embodiment of the present disclosure is matched with the arrangement positions of the first bearing set 331, the second bearing set 341, the second gear 320 and the clamping mechanism 400 of the output shaft, so as to provide a stable supporting system.
In one embodiment, the shaft sleeve includes a first shaft sleeve 330 and a second shaft sleeve 340, the first shaft sleeve 330 and the second shaft sleeve 340 are respectively provided with a first bearing group 331 and a second bearing group 341, the speed reduction sleeve includes a first speed reduction sleeve 421 and a second speed reduction sleeve 422, the first speed reduction sleeve 421 and the second speed reduction sleeve 422 are respectively provided with a pair of ball bearings 230, the first shaft sleeve 330 and the first speed reduction sleeve 421 are integrally formed, and the second shaft sleeve 340 and the second speed reduction sleeve 422 are integrally formed.
In one embodiment, the speed reducing mechanism 200 further includes a driving sleeve 250, the bottom end of the driving sleeve 250 is connected with the first speed reducing sleeve 421, the bottom end of the driving sleeve 250 abuts against the ball bearing 230, and a coupling structure between the driving device and the wheel axle 220 is disposed in the driving sleeve 250.
In one embodiment, the output shaft mechanism 300 further includes an end sleeve 350, an end cover 360, a nut 370 and a sealing sleeve 380, the bottom end of the end sleeve 350 abuts against the shaft sleeve, the nut 370 is screwed on the periphery of the output shaft and abuts against the first bearing group 331, the sealing sleeve 380 is sleeved on the periphery of the step at the top end of the output shaft, a sealing ring is disposed between the end sleeve 350 and the sealing sleeve 380, and the end cover 360 covers the top end of the end sleeve 350.
According to the drill pipe 500 power head of the embodiment of the present disclosure, in a conventional state, the elastic force of the spring 440 presses the core cap 424 (first position), the grip jaw 410 is pushed to clamp the drill pipe 500 by the core cap 424, when drilling is completed and the drill pipe 500 is pulled out of the well, oil is only supplied to the pressure cylinder 430, the piston 432 pushes the cap 423, the core cap 424 to move (second position) against the elastic force by the pressure of the oil, thereby releasing the grip jaw 410 from the drill pipe 500, and during pulling out of the drill pipe 500, even if a hydraulic system, an engine, etc. malfunctions, the drill pipe 500 is not dropped into the well.
It should be noted that other pressurized fluids, such as air, may be used in addition to oil.
Any references to directions and orientations in the description of the embodiments herein are for convenience only and should not be construed as limiting the scope of the invention in any way. The description of the preferred embodiments will refer to combinations of features, which may be present alone or in combination, and the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. A drill pipe power head, comprising:
a drive mechanism (100);
The speed reducing mechanism (200) is provided with a first gear, and the first gear is in transmission connection with the driving mechanism (100);
The output shaft mechanism (300) is provided with an output shaft (310) and a second gear, the output shaft (310) and the second gear rotate integrally, the second gear is meshed with the first gear so as to be suitable for the driving mechanism (100) to be in transmission connection with the output shaft (310) through the first gear and the second gear, the axial length of the output shaft is L, and the second gear is positioned at the position of 0.4L from the top end of the output shaft;
A clamping mechanism (400) disposed on the outer periphery of the output shaft mechanism (300) and integrally rotated with the output shaft mechanism (300), the clamping mechanism (400) being located at a bottom half section of the output shaft (310), the clamping mechanism (400) comprising:
-a jaw (410) arranged at the periphery of the output shaft (310) and freely movable in a radial direction with respect to the output shaft (310);
The telescopic part (420) is arranged on the periphery of the clamping jaw (410), the telescopic part (420) is provided with at least one movable body capable of freely moving along the axial direction, and a spring (440) for compressing the movable body is arranged in the telescopic part (420);
A pressure cylinder (430) disposed on the outer periphery of the output shaft (310), wherein the pressure cylinder (430) is provided with a cylinder body (431) and a piston (432), the piston (432) is cylindrically sleeved on the outer periphery of the output shaft (310), and both ends of the piston (432) are respectively contacted with pressure fluid and a movable body of the telescopic part (420);
Wherein an inner peripheral side of the movable body of the telescopic part (420) and/or an outer peripheral side of the clamping jaw (410) form a wedge surface, so that in a clamping state, the elastic force of the spring (440) overcomes the pressure of the pressure fluid to press the movable body to a first position, thereby enabling the movable body to push the clamping jaw (410) to clamp a drill rod (500), and in a releasing state, the pressure of the pressure fluid overcomes the elastic force of the spring (440) to press the movable body to a second position, thereby enabling the movable body to release the clamping jaw (410) to release the drill rod (500);
The telescopic part (420) further comprises a bottom cover (422), the bottom cover (422) is arranged at the bottom end of the output shaft (310), and the movable body is provided with an outer cover (421) and a top cover (423) which move integrally;
the top cover (423) is provided with a neck (4231) extending upwards, the neck (4231) is sleeved on the periphery of the output shaft (310), the piston (432) is sleeved on the periphery of the neck (4231), the top of the top cover (423) is further provided with a protruding portion (4232), when the movable body is at least at the first position, the protruding portion (4232) is limited on the inner side of the cylinder body (431), and the top end of the top cover (423) is limited on the bottom end of the cylinder body (431).
2. The drill pipe power head according to claim 1, characterized in that the pressure cylinder (430) further comprises a cylinder cover (433), the output shaft mechanism (300) further comprises a shaft sleeve, the shaft sleeve is provided with a bearing, the top end of the cylinder cover (433) is abutted against the bottom end of the shaft sleeve, and a sealing ring is arranged on the inner periphery of the cylinder cover (433).
3. The drill rod power head according to claim 1, wherein the output shaft mechanism (300) further comprises a shaft sleeve, a first bearing group (331) and a second bearing group (341) are sequentially arranged on the shaft sleeve from top to bottom, the second gear is located between the first bearing group (331) and the second bearing group (341), the first bearing group (331) is a pair of single-row centripetal opposite conical roller bearings, and the second bearing group (341) is a cylindrical roller bearing.
4. A drill rod power head according to claim 3, characterized in that a first distance is formed between the first bearing set (331) and the second bearing set (341), a second distance is formed between the second bearing set (341) and the clamping jaw (410), and the ratio of the first distance to the second distance is 2:3.
5. A drill rod power head according to claim 3, characterized in that the reduction mechanism (200) further comprises a reduction sleeve, an axle (220) and a pair of ball bearings (230), the first gear being arranged on the axle (220), the pair of ball bearings (230) being supported at both ends of the first gear, respectively, the pair of ball bearings (230) overlapping at least partly the first bearing set (331) and the second bearing set (341), respectively, in the axial direction.
6. The drill rod power head according to claim 5, wherein the shaft sleeve comprises a first shaft sleeve (330) and a second shaft sleeve (340), the first shaft sleeve (330) and the second shaft sleeve (340) are respectively provided with a first bearing group (331) and a second bearing group (341), the reduction sleeve comprises a first reduction sleeve (241) and a second reduction sleeve (242), the first reduction sleeve (241) and the second reduction sleeve (242) are respectively provided with a pair of ball bearings (230), the first shaft sleeve (330) and the first reduction sleeve (241) are integrally formed, and the second shaft sleeve (340) and the second reduction sleeve (242) are integrally formed.
7. The drill rod power head according to claim 6, wherein the speed reducing mechanism (200) further comprises a driving sleeve (250), the bottom end of the driving sleeve (250) is connected with the first speed reducing sleeve (241), the bottom end of the driving sleeve (250) abuts against the ball bearing (230), and a coupling structure between a driving device and the wheel shaft (220) is arranged in the driving sleeve (250).
8. The drill rod power head according to claim 1, characterized in that the movable body of the telescopic part (420) further comprises a core cover (424), the core cover (424) is arranged at the bottom of the top cover (423), and the spring (440) is arranged between the core cover (424) and the bottom cover (422).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410535230.1A CN118346164B (en) | 2024-04-30 | 2024-04-30 | Drill rod power head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410535230.1A CN118346164B (en) | 2024-04-30 | 2024-04-30 | Drill rod power head |
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| Publication Number | Publication Date |
|---|---|
| CN118346164A CN118346164A (en) | 2024-07-16 |
| CN118346164B true CN118346164B (en) | 2025-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410535230.1A Active CN118346164B (en) | 2024-04-30 | 2024-04-30 | Drill rod power head |
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| Country | Link |
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| CN (1) | CN118346164B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204646085U (en) * | 2015-04-24 | 2015-09-16 | 西安科技大学 | Light hydraulic drilling rig for coal mine |
| CN207436902U (en) * | 2017-01-12 | 2018-06-01 | 西安科技大学 | A kind of gas extraction, drainage and discharge driller power head |
| CN116591605A (en) * | 2023-06-30 | 2023-08-15 | 徐州徐工基础工程机械有限公司 | Directional drilling machine power head and drilling machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070051508A1 (en) * | 2003-04-15 | 2007-03-08 | Mariano Pecorari | Pump drive head with integrated stuffing box and clamp |
| CN209040751U (en) * | 2018-09-07 | 2019-06-28 | 北京新能正源智能装备有限公司 | Power head |
| CN212359606U (en) * | 2020-05-28 | 2021-01-15 | 上海久卓机电设备有限公司 | Power head |
-
2024
- 2024-04-30 CN CN202410535230.1A patent/CN118346164B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204646085U (en) * | 2015-04-24 | 2015-09-16 | 西安科技大学 | Light hydraulic drilling rig for coal mine |
| CN207436902U (en) * | 2017-01-12 | 2018-06-01 | 西安科技大学 | A kind of gas extraction, drainage and discharge driller power head |
| CN116591605A (en) * | 2023-06-30 | 2023-08-15 | 徐州徐工基础工程机械有限公司 | Directional drilling machine power head and drilling machine |
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| CN118346164A (en) | 2024-07-16 |
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