Thrust bearing pack structure of long-life screw drill for well drilling

Abstract

The invention provides a thrust bearing pack structure of a long-life screw drill for well drilling, and relates to the technical field of well drilling bearings, the thrust bearing pack structure comprises an end face static ring, a bearing mechanism facilitating powerful well drilling is arranged in the end face static ring, an oil box mechanism facilitating sealing is arranged in the end face static ring, and the bearing mechanism comprises an inner moving ring; the oil box mechanism comprises an L-shaped surrounding ring and an oil storage box, the inner moving ring is located on the inner side wall of the end face static ring, and the L-shaped surrounding ring is fixedly installed at the upper end of the end face static ring. According to the device, the oil storage box is arranged, lubricating oil is stored in the oil storage box, when the inner moving ring drives the oil storage box to rotate through the supporting ring, the lubricating oil enters a gap between the end face static ring and the steel ball, the gap can be filled with a continuous oil film formed by the lubricating oil, and dust, water and other impurities are prevented from entering the bearing; the cleanliness of the bearing can be kept, abrasion and corrosion can be reduced, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of drilling bearings, and more specifically, particularly relates to a thrust bearing group structure of a long-life screw drill tool for drilling. Background Art

[0002] When drilling, users generally use drilling tools. In screw drilling tools, bearings mainly play the role of supporting and reducing friction. They bear the axial force, radial force and torque from the working of the drilling tools to ensure that the screw drilling tools can operate stably.

[0003] The Chinese patent publication number is: CN107724951A, a hollow rolling-sliding composite thrust bearing for screw drilling tools. The invention consists of an outer spacer, a bearing outer ring, a bearing inner ring, an inner spacer, a hollow slider, an end raceway, and a hollow conical or hollow cylindrical roller; the outer ring of the bearing and the inner ring of the bearing are arranged crosswise to form a "maze-like" flow channel, which can give full play to the lubrication and cooling functions of the drilling fluid; hollow rollers are used as rolling bodies and hollow sliders are used as sliding bodies, which can give full play to the heat dissipation capacity, vibration absorption and vibration reduction functions of the hollow structure; the rolling body and the sliding body act simultaneously to improve its load-bearing capacity and maintain a high speed.

[0004] Existing drilling bearing groups have the following disadvantages:

[0005] 1. Most existing bearing sets are divided into separate parts. The connection and fit between the separate parts may not be tight and stable enough. When subjected to large loads and complex working conditions, they are prone to loosening and dislocation, affecting the stability and reliability of the bearings. The manufacturing and assembly accuracy of the separate parts is difficult to control, which may affect the running accuracy and working performance of the bearings.

[0006] 2. Existing bearing groups reserve gaps between the inner and outer rings and the steel balls to ensure that there is a certain amount of reserved space when the inner and outer rings and rolling elements expand thermally to avoid jamming. However, these gaps may allow dust and other impurities to enter due to the working environment during actual operation, and may cause friction with the steel column, inner ring and outer ring during the operation of the bearing, resulting in increased surface wear and possible overheating, which will affect the service life of the bearing.

[0007] Therefore, in view of this, the existing structure and defects are studied and improved, and a thrust bearing group structure of a long-life screw drill bit for drilling is provided, in order to achieve a more practical purpose. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a thrust bearing group structure of a long-life screw drill tool for drilling to solve the above problems.

[0009] A thrust bearing group structure of a long-life screw drill for drilling, comprising an end static ring, a bearing mechanism for strong drilling is arranged inside the end static ring, an oil box mechanism for sealing is arranged inside the end static ring, the bearing mechanism comprises an inner moving ring, the oil box mechanism comprises an L-shaped surrounding ring and an oil storage box, the inner moving ring is located on the inner side wall of the end static ring, the L-shaped surrounding ring is fixedly mounted on the upper end of the end static ring, the oil storage box is rotatably located on the upper end of the L-shaped surrounding ring, the inner side wall of the end static ring is provided with multiple groups of second grooves, the outer side wall of the inner moving ring is provided with multiple groups of first grooves, the position of each second groove corresponds to the position of the first groove, and multiple steel balls are arranged between each second groove and the first groove , each of the steel balls is arranged equidistantly in an array, each of the steel balls is movably located between each first groove and the second groove, a support ring is fixedly installed on the upper end of the inner moving ring, the oil storage box is fixedly installed on the upper end of the support ring, a snap-on cover is provided on the upper end of the snap-on cover, a one-way oil inlet valve is fixedly installed on the upper end of the snap-on cover, a sealing gasket is fixedly installed on the lower end of the snap-on cover, the sealing gasket is located on the inner side wall of the oil storage box, a plurality of oil outlet grooves are penetrated through the lower end of the oil storage box, each of the oil outlet grooves is equidistantly arranged in an array, and the angles between each of the oil outlet grooves are sixty degrees, and a sealing retaining ring is fixedly installed on the upper end of the L-shaped surrounding ring, and the sealing retaining ring is located on the outside of the oil storage box.

[0010] Preferably, a plurality of inclined guide grooves are formed through the upper end portion of the L-shaped encircling ring, and each of the inclined guide grooves is distributed in an equidistant array.

[0011] Preferably, the end of each of the inclined guide grooves corresponds to the oil outlet groove, and an inclined guide tube is fixedly mounted on the inner side wall of each of the inclined guide grooves.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, the inner dynamic ring is located on the inner side wall of the end static ring, so that the device is of an integrated design. The integrated design reduces the number of components and makes the overall structure more compact. A plurality of steel balls are arranged between each second groove and the first groove, which can withstand a large axial load and ensure the stability and reliability of the device during operation. Since the various parts of the integrated inner ring structure are closely connected and have strong integrity, they can better resist various external forces and vibrations during operation and reduce performance degradation caused by loose or worn parts.

[0014] In the present invention, by selecting materials, such as using materials with high surface hardness, high wear resistance, high strength, high rigidity, good toughness, as well as high temperature resistance and corrosion resistance, the wear resistance of the friction pair can be improved, wear can be reduced, and the service life of the bearing can be extended. The integrated structure of the inner ring can improve the load-bearing capacity, and has good stability under large loads and complex working conditions in deep wells, thereby improving the service life of the bearing as a whole. At the same time, the optimized structure and good load-bearing performance can improve the working efficiency of the screw drill and increase the service life of the screw drill.

[0015] In the present invention, an oil storage box is provided, in which lubricating oil is stored. When the inner moving ring drives the oil storage box to rotate through the supporting ring, the lubricating oil can enter the gap between the end surface static ring and the steel ball. The continuous oil film formed by the lubricating oil can fill the gap, prevent dust, moisture and other impurities from entering the interior of the bearing, maintain the cleanliness of the bearing, reduce wear and corrosion, and extend the service life of the bearing.

[0016] In the present invention, when the end surface static ring, the inner dynamic ring and the steel ball are running at high speed, a lubricating oil that can follow the movement of the inner dynamic ring and be injected into the gap is arranged. While playing a sealing role, the oil film plays a lubricating role between the moving parts, converting the sliding friction into liquid friction, greatly reducing the friction coefficient. This makes the bearing run more smoothly, reduces energy loss and heat, and reduces the surface wear between the end surface static ring, the inner dynamic ring and the steel ball.

[0017] In the present invention, by providing a sealing baffle ring on the L-shaped surrounding ring, it is possible to achieve effective sealing and blocking of the lubricating oil, prevent excessive loss of the lubricating oil, ensure that the bearing and related moving parts are always in a good lubricated state, ensure that the lubricating oil enters between the end face static ring and the inner moving ring, and avoid the lubricating oil from leaking into other working environments during use, and avoid oil leakage from polluting the drilling environment.

[0018] In the present invention, corresponding oil outlet grooves, inclined guide grooves and inclined guide tubes are arranged to cooperate with each other, that is, in actual use, the lubricating oil will enter the inclined guide tube only when the oil outlet groove on the oil storage box is rotated and overlaps with the inclined guide groove on the L-shaped surrounding ring, so that the lubricating oil can enter the gap between the end static ring and the inner dynamic ring in small amounts and multiple times during use. Supplying the lubricating oil in small amounts and multiple times can ensure that a fresh lubricating oil film is always maintained in the gap during the operation of the bearing. Supplying a small amount of lubricating oil each time can avoid local overheating caused by a large amount of lubricating oil entering at the same time. Supplying oil in small amounts and multiple times can avoid waste caused by supplying too much lubricating oil, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the end surface static ring structure of the present invention;

[0020] Figure 2It is a schematic diagram of the L-shaped ring structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the inner moving ring of the present invention;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the end surface static ring of the present invention;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the oil storage box of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the card-joined cover of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the oil storage box of the present invention;

[0026] Figure 8 It is a schematic diagram of the oblique guide groove structure of the present invention.

[0027] In the figure, the correspondence between the component names and the figure numbers is: 1. end face static ring; 11. inner dynamic ring; 12. steel ball; 13. first groove; 14. second groove; 2. L-shaped surrounding ring; 21. sealing retaining ring; 22. inclined guide groove; 23. inclined guide tube; 3. oil storage box; 31. snap-on cover; 32. one-way oil inlet valve; 33. oil outlet groove; 34. sealing gasket; 4. support ring. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0029] See also Figure 1 - Figure 8 The present invention provides a thrust bearing group structure of a long-life screw drill for drilling, including an end static ring 1, a bearing mechanism for strong drilling is arranged in the end static ring 1, an oil box mechanism for sealing is arranged in the end static ring 1, the bearing mechanism includes an inner moving ring 11, the oil box mechanism includes an L-shaped surrounding ring 2 and an oil storage box 3, the inner moving ring 11 is located on the inner side wall of the end static ring 1, in the device, the inner moving ring 11 is located on the inner side wall of the end static ring 1, so that the device is an integrated design, the integrated design reduces the number of parts and components, and makes the overall structure more compact, a plurality of steel balls 12 are arranged between each second slot 14 and the first slot 13, which can withstand a large axial load and ensure the stability and reliability of the device during operation, because the various parts of the integrated inner ring structure are closely connected and have strong integrity, so that various external forces and vibrations can be better resisted during operation, and the performance degradation caused by loosening or wear of parts can be reduced, and the device has the characteristics of anti-fragmentation, anti-wear and impact resistance, and its structural form remains intact, the pressure-bearing life is long, and the applicability is strong;

[0030] The L-shaped surrounding ring 2 is fixedly installed on the upper end of the end surface static ring 1, and the oil storage box 3 is rotated and located at the upper end of the L-shaped surrounding ring 2. In actual use, the inner moving ring 11 will rotate with the rotating shaft. When the inner moving ring 11 rotates, it will drive the support ring 4 to rotate. The rotation of the support ring 4 will drive the oil storage box 3 above the support ring 4 to rotate. The rotation of the oil storage box 3 will drive the multiple oil outlet grooves 33 on the oil storage box 3 to rotate. Lubricating oil is stored in the oil storage box 3. When the oil storage box 3 rotates, the oil outlet grooves 33 and the L-shaped surrounding ring are driven When the inclined guide grooves 22 on the end face overlap, the lubricating oil in the oil storage box 3 will be thrown into the inclined guide groove 22 by inertia. An inclined conduit 23 is provided in the inclined guide groove 22. The lubricating oil will enter the inclined conduit 23. The end of the inclined conduit 23 is located at the gap between the end face static ring 1 and the inner dynamic ring 11. Then, the lubricating oil will enter the gap between the end face static ring 1 and the inner dynamic ring 11. The formed oil film can block the gap between the end face static ring 1 and the inner dynamic ring 11 to prevent dust from entering.

[0031] The inner side wall of the end surface static ring 1 is provided with a plurality of groups of second grooves 14, and the outer side wall of the inner dynamic ring 11 is provided with a plurality of groups of first grooves 13, and the positions of each second groove 14 and the first groove 13 correspond to each other, and a plurality of steel balls 12 are arranged between each second groove 14 and the first groove 13, and each steel ball 12 is arranged in an array with equal distance, and each steel ball 12 is movably located between each first groove 13 and the second groove 14, and a support ring 4 is fixedly installed on the upper end of the inner dynamic ring 11, and an oil storage box 3 is fixedly installed on the upper end of the support ring 4, and a snap-on cover 31 is provided on the upper end of the oil storage box 3, and a one-way oil inlet valve 32 is fixedly installed on the upper end of the snap-on cover 31, and a sealing gasket 34 is fixedly installed on the lower end of the snap-on cover 31, and the sealing gasket 34 is located on the inner side wall of the oil storage box 3, and a plurality of oil outlet grooves 33 are penetrated through the lower end of the oil storage box 3, and each oil outlet groove 33 They are all arranged equidistantly in an array, and the angles between each oil outlet groove 33 are all sixty degrees. A sealing baffle ring 21 is fixedly installed on the upper end of the L-shaped surrounding ring 2, and the sealing baffle ring 21 is located on the outside of the oil storage box 3. A sealing baffle ring 21 is set at the upper end of the L-shaped surrounding ring 2, and the sealing baffle ring 21 is located at the outer end of the snap-on cover 31, which can form a baffle for the oil outlet groove 33 below the oil storage box 3, so that the oil storage box 3 forms a sealing barrier when the oil is discharged to avoid splashing of lubricating oil. By setting a sealing baffle ring 21 on the L-shaped surrounding ring 2, it is possible to achieve effective sealing and blocking of the lubricating oil, prevent excessive loss of lubricating oil, ensure that the bearing and related moving parts are always in a good lubrication state, ensure that the lubricating oil enters between the end surface static ring 1 and the inner dynamic ring 11, and prevent the lubricating oil from leaking into other working environments during use, and prevent oil leakage from polluting the drilling environment;

[0032] The upper end of the L-shaped ring 2 is penetrated by a plurality of inclined guide grooves 22, each of which is arranged in an equidistant array, and the end of each inclined guide groove 22 corresponds to the oil outlet groove 33, and the inner wall of each inclined guide groove 22 is fixedly installed with an inclined conduit 23. The present device cooperates with the inclined guide groove 22 and the inclined conduit 23 by setting corresponding oil outlet grooves 33, that is, in actual use, the lubricating oil will enter the inclined conduit 23 only when the oil outlet groove 33 on the oil storage box 3 is rotated and coincides with the inclined guide groove 22 on the L-shaped ring 2, so that the lubricating oil can enter the gap between the end static ring 1 and the inner dynamic ring 11 in small amounts and multiple times during use. Supplying lubricating oil in small amounts and multiple times can ensure that a fresh lubricating oil film is always maintained in the gap during the operation of the bearing, supplying a small amount of lubricating oil each time can avoid local overheating caused by a large amount of lubricating oil entering at the same time, and supplying oil in small amounts and multiple times can avoid waste caused by supplying too much lubricating oil, thereby saving costs.

[0033] Working principle:

[0034] The first step is that users generally use drilling tools when drilling. In screw drilling tools, bearings mainly play the role of supporting and reducing friction. They bear the axial force, radial force and torque from the working of the drilling tools, ensure that the screw drilling tools can operate stably, and transmit the torque generated by the motor to the drill bit to achieve drilling operations;

[0035] The second step is that in this device, the inner moving ring 11 is located on the inner side wall of the end surface static ring 1, so that the device is an integrated design. The integrated design reduces the number of parts and makes the overall structure more compact. A plurality of steel balls 12 are arranged between each second slot 14 and the first slot 13, which can withstand a large axial load and ensure the stability and reliability of the device during operation. Since the various parts of the integrated inner ring structure are closely connected and have strong integrity, they can better resist various external forces and vibrations during operation, reduce the performance degradation caused by loose or wear of parts, and have the characteristics of anti-fragmentation, anti-wear and impact resistance. The structural form remains intact, the pressure-bearing life is long, and the applicability is strong.

[0036] The third step is that in actual use, the inner moving ring 11 will rotate with the rotating shaft, and when the inner moving ring 11 rotates, it will drive the support ring 4 to rotate. The rotation of the support ring 4 will drive the oil storage box 3 above the support ring 4 to rotate. The rotation of the oil storage box 3 will drive the multiple oil outlet grooves 33 on the oil storage box 3 to rotate. Lubricating oil is stored in the oil storage box 3. When the oil storage box 3 rotates and drives the oil outlet groove 33 to coincide with the inclined guide groove 22 on the L-shaped surrounding ring 2, the lubricating oil in the oil storage box 3 will be inertially thrown into the inclined guide groove 22. The inclined guide groove 22 is provided with an inclined conduit 23. The lubricating oil will enter the inclined conduit 23. The end of the inclined conduit 23 is located in the gap between the end surface static ring 1 and the inner moving ring 11, and then the lubricating oil will enter the gap between the end surface static ring 1 and the inner moving ring 11. The formed oil film can block the gap between the end surface static ring 1 and the inner moving ring 11 to prevent dust from entering.

[0037] The device is provided with an oil storage box 3, in which lubricating oil is stored. When the inner moving ring 11 drives the oil storage box 3 to rotate through the supporting ring 4, the lubricating oil enters the gap between the end surface static ring 1 and the steel ball 12. The continuous oil film formed by the lubricating oil can fill the gap, prevent dust, moisture and other impurities from entering the interior of the bearing, maintain the cleanliness of the bearing, reduce wear and corrosion, and extend the service life of the bearing.

[0038] The device is provided with lubricating oil that can follow the movement of the inner moving ring 11 and be injected into the gap when the end surface static ring 1, the inner moving ring 11 and the steel ball 12 are running at high speed. While playing a sealing role, the oil film plays a lubricating role between the moving parts, converting the sliding friction into liquid friction, greatly reducing the friction coefficient, which makes the bearing run more smoothly, reduces energy loss and heat, and reduces the surface wear between the end surface static ring 1, the inner moving ring 11 and the steel ball 12;

[0039] In the fourth step, a sealing ring 21 is provided at the upper end of the L-shaped surrounding ring 2. The sealing ring 21 is located at the outer end of the snap-on cover 31, and can form a barrier for the oil outlet groove 33 below the oil storage box 3, so that the oil storage box 3 forms a sealing barrier when discharging oil to prevent the lubricating oil from splashing;

[0040] The device is provided with a sealing ring 21 on the L-shaped surrounding ring 2, which can effectively seal and block the lubricating oil, prevent excessive loss of lubricating oil, ensure that the bearing and related moving parts are always in a good lubricating state, ensure that the lubricating oil enters between the end surface static ring 1 and the inner dynamic ring 11, and prevent the lubricating oil from leaking into other working environments during use, and prevent the oil leakage from polluting the drilling environment;

[0041] The device is equipped with corresponding oil outlet grooves 33, inclined guide grooves 22 and inclined guide tubes 23, that is, in actual use, the lubricating oil will enter the inclined guide tubes 23 only when the oil outlet grooves 33 on the oil storage box 3 are rotated and overlap with the inclined guide grooves 22 on the L-shaped surrounding ring 2, so that the lubricating oil can enter the gap between the end surface static ring 1 and the inner dynamic ring 11 in small amounts and multiple times during use. Supplying lubricating oil in small amounts and multiple times can ensure that a fresh lubricating oil film is always maintained in the gap during the operation of the bearing. Supplying a small amount of lubricating oil each time can avoid local overheating caused by a large amount of lubricating oil entering at the same time. Supplying oil in small amounts and multiple times can avoid waste caused by excessive supply of lubricating oil, thereby saving costs.

[0042] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A thrust bearing group structure of a long-life screw drill for drilling, comprising an end surface static ring (1), characterized in that: The end surface static ring (1) is provided with a bearing mechanism for facilitating strong drilling, and the end surface static ring (1) is provided with an oil box mechanism for facilitating sealing; The bearing mechanism comprises an inner moving ring (11), and the oil box mechanism comprises an L-shaped surrounding ring (2) and an oil storage box (3); the inner moving ring (11) is located on the inner side wall of the end surface static ring (1); the L-shaped surrounding ring (2) is fixedly mounted on the upper end of the end surface static ring (1); and the oil storage box (3) is rotatably located on the upper end of the L-shaped surrounding ring (2).

2. A thrust bearing group structure of a long-life screw drill for drilling as claimed in claim 1, characterized in that: The inner side wall of the end surface static ring (1) is provided with a plurality of groups of second grooves (14), and the outer side wall of the inner dynamic ring (11) is provided with a plurality of groups of first grooves (13); Wherein, the positions of each of the second grooves (14) and the first grooves (13) correspond to each other.

3. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 2, characterized in that: A plurality of steel balls (12) are provided between each of the second grooves (14) and the first grooves (13), and each of the steel balls (12) is arranged in an array with equal distances; Each of the steel balls (12) is movably located between each of the first grooves (13) and the second grooves (14).

4. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 3, characterized in that: A support ring (4) is fixedly mounted on the upper end of the inner moving ring (11), and the oil storage box (3) is fixedly mounted on the upper end of the support ring (4).

5. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 4, characterized in that: The upper end of the oil storage box (3) is provided with a snap-on cover (31), and the upper end of the snap-on cover (31) is fixedly mounted with a one-way oil inlet valve (32).

6. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 5, characterized in that: A sealing gasket (34) is fixedly mounted on the lower end of the snap-on cover (31), and the sealing gasket (34) is located on the inner side wall of the oil storage box (3).

7. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 6, characterized in that: A plurality of oil outlet grooves (33) are formed through the lower end of the oil storage box (3), and each of the oil outlet grooves (33) is arranged in an array at equal distances; Wherein, the included angle between each of the oil outlet grooves (33) is sixty degrees.

8. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 7, characterized in that: A sealing baffle ring (21) is fixedly mounted on the upper end of the L-shaped surrounding ring (2), and the sealing baffle ring (21) is located outside the oil storage box (3).

9. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 8, characterized in that: A plurality of inclined guide grooves (22) are formed through the upper end of the L-shaped encircling ring (2), and each of the inclined guide grooves (22) is distributed in an equidistant array.

10. A thrust bearing assembly structure for a long-life screw drill for drilling as claimed in claim 9, characterized in that: The end of each inclined guide groove (22) corresponds to the oil outlet groove (33), and an inclined guide tube (23) is fixedly mounted on the inner side wall of each inclined guide groove (22).

Images