Polycrystalline diamond spherical sliding bearing and drilling tool
By adding a rotating ring and slide in the spherical sliding bearing, combining the polycrystalline diamond layer and oil guide groove, the problem of insufficient bearing capacity of spherical sliding bearings under radial and axial loads in the prior art is solved, and a higher Rotating flexibility and radial load-bearing capacity improve the service life and working efficiency of the drill bit.
Patent Information
- Application Number
- CN202411510883.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-01-10
AI Technical Summary
When existing spherical sliding bearings are loaded radially and axially, it is difficult to meet the needs of rotational flexibility and long-term use stability. Especially under harsh conditions such as oil drilling, traditional structures have insufficient load-bearing capacity.
By adding a rotating ring and slide, combining a polycrystalline diamond layer, an oil guide groove and a sealing ring are installed, and the friction is reduced by using steel balls to ensure that the lubricating oil is effectively introduced into the friction surface, and the axial angle flexibility and radial load-bearing capacity are improved.
It realizes efficient lubrication and stability of spherical sliding bearings, enhances flexibility and radial load-bearing capacity for axial angle changes, extends the service life of the drill bit and reduces mining costs.
Smart Images
Figure CN119288978A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of sliding bearings, and in particular to a polycrystalline diamond spherical sliding bearing and a drilling tool. Background Art
[0002] With the development of materials science, the preparation technology of polycrystalline diamond has been continuously improved, and polycrystalline diamond materials with higher quality and more stable performance can be produced, which provides a basis for the manufacture of polycrystalline diamond spherical sliding bearings. Traditional plane sliding bearings or rolling bearings may not meet these requirements in some cases. Spherical sliding bearings can adapt to the deflection and swing of the shaft, provide better stability and load-bearing capacity. In some specific industries and fields, such as oil and gas extraction, geological drilling, mining machinery, aerospace, etc., the demand for high-performance bearings is very urgent. The successful application of polycrystalline diamond spherical sliding bearings in these fields has further promoted the development and improvement of its technology. For example, in the process of oil drilling, the drill bit needs to withstand huge axial and radial forces, and at the same time work under harsh geological conditions. Polycrystalline diamond spherical sliding bearings can meet these requirements, improve the service life and work efficiency of the drill bit, and reduce mining costs.
[0003] The spherical bearings currently in use usually have an inner ring installed in an outer ring, and the two are in contact with each other to form a spherical friction pair, thereby achieving simultaneous adaptation to rotation and axial deflection. However, when this structure is subjected to a certain load in the radial and axial directions at the same time, it still has certain deficiencies in terms of flexibility in rotation and deflection and stability for long-term use. Therefore, this scheme proposes a polycrystalline diamond spherical sliding bearing to meet the use of sliding bearings on drilling tools. Summary of the invention
[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a polycrystalline diamond spherical sliding bearing and a drilling tool. The spherical sliding bearing has a strong load-bearing capacity by adding a rotating ring, and its rotating ring can also realize concentric rotation in the fixed ring, which effectively improves the flexibility of the axial angle change of the spherical sliding bearing and makes its radial load-bearing more superior. By setting two slideways 1 and 2 respectively between the fixed ring and the rotating ring, and orderly arranging steel balls inside them, friction is reduced and the handling performance is improved. The oil guide groove is set up so that the injected lubricating oil is effectively introduced into each friction surface inside it, ensuring a good lubrication effect of each friction surface.
[0005] The present invention also provides the above-mentioned polycrystalline diamond spherical sliding bearing and drilling tool, including: a fixed ring, the outer surface of the fixed ring is provided with a central groove, the interior of the central groove is provided with an oil filling hole, the internal thread of the oil filling hole is connected with a closing bolt, the inner wall of the fixed ring is provided with a second slideway, and the left and right sides of the inner wall of the fixed ring are provided with a second annular slideway; a rotating ring, the outer surface of the rotating ring is provided with an oil guide groove in the middle, the outer surface of the rotating ring is provided with a slideway 1, the slideway 1 and the slideway 2 are on the same longitudinal section, and a steel ball is movably connected between the slideway 1 and the slideway 2. The inner wall of the fixed ring is provided with a second annular groove on both sides, the left and right end faces of the rotating ring are provided with a first annular groove, and the inner wall of the rotating ring is slidably connected with a movable ring; a sealing ring, the sealing ring is provided with two groups, the two groups of sealing rings are respectively located on the left and right sides of the rotating ring, the outer surfaces of the two groups of sealing rings can be fixedly connected with a retaining ring 1, the outer surfaces of the two groups of sealing rings are fixedly connected with a retaining ring 2, the retaining ring 1 is slidably connected to the second annular groove, the retaining ring 2 is slidably connected to the first annular groove, and the outer surfaces of the two groups of sealing rings are fixedly connected with scrapers.
[0006] According to the polycrystalline diamond spherical sliding bearing provided by the present invention, the outer surface of the movable ring contacts and cooperates with the inner surface of the rotating ring to form a spherical friction pair, and the contact surfaces of the movable ring and the rotating ring are both provided with a polycrystalline diamond layer. While increasing the contact surface, it is possible to effectively and flexibly adjust the axial angle, and the load capacity of the sliding bearing is effectively improved by the polycrystalline diamond layer.
[0007] According to the polycrystalline diamond spherical sliding bearing provided by the present invention, the outer surface of the rotating ring contacts and cooperates with the inner surface of the fixed ring to form a spherical friction pair, and the contact surfaces of the rotating ring and the fixed ring are both provided with a polycrystalline diamond layer. The contact surface is enlarged to make it stable in rotation, and the polycrystalline diamond layer is provided to effectively improve its load capacity.
[0008] According to a polycrystalline diamond spherical sliding bearing provided by the present invention, the central groove and the oil guide groove are on the same longitudinal section, the oil injection hole is connected to the oil guide groove, the oil guide hole is provided inside the oil guide groove, and the oil guide hole is connected to the outer surface of the movable ring. The oil guide groove is connected through the oil injection hole, and the oil is guided by the oil guide hole, so that the lubricating oil is effectively introduced to lubricate the internal parts.
[0009] According to the polycrystalline diamond spherical sliding bearing provided by the present invention, the two sets of sealing rings are distributed in left and right mirror images, and the two sets of scrapers are slidably connected to the left and right outer surfaces of the movable ring respectively. The sealing rings make the sliding bearing waterproof and dustproof.
[0010] According to a polycrystalline diamond spherical sliding bearing provided by the present invention, two slideways 1 are provided, and the two slideways 1 are equidistantly distributed on the left and right sides of the oil guide groove, and two slideways 2 are provided, and the two slideways 2 are respectively aligned with the two slideways 1, so that the two groups of balls set up inside can play a role of stable support, reduce the internal friction, and improve the flexibility of the sliding bearing.
[0011] According to a polycrystalline diamond spherical sliding bearing provided by the present invention, the steel balls are provided in two groups of sixty balls each, and the two groups of steel balls are respectively located between the two slideways one and two.
[0012] A drilling tool provided according to the present invention comprises the polycrystalline diamond spherical sliding bearing according to any one of claims 1 to 7. The sliding bearing is suitable for various drilling tools.
[0013] Compared with the prior art, the polycrystalline diamond spherical sliding bearing and drill tool of the present invention have a stronger load-bearing capacity by adding a rotating ring, and the rotating ring can also rotate concentrically within the fixed ring, which effectively improves the flexibility of the axial angle change of the spherical sliding bearing and makes its radial load-bearing more superior.
[0014] Compared with the prior art, the polycrystalline diamond spherical sliding bearing and drill tool of the present invention respectively set two slideways one and two between the fixed ring and the rotating ring, and orderly arrange steel balls inside them to reduce friction and improve the handling performance, and the established oil guide groove allows the injected lubricating oil to be effectively introduced into the various friction surfaces inside, ensuring a good lubrication effect on each friction surface. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments;
[0016] Figure 1 This is an overall structural diagram of a polycrystalline diamond spherical sliding bearing of the present invention;
[0017] Figure 2 This is a schematic diagram of the internal structure of a polycrystalline diamond spherical sliding bearing of the present invention;
[0018] Figure 3 A polycrystalline diamond spherical sliding bearing according to the present invention Figure 2 Enlarged view of point A in the middle;
[0019] Figure 4 This is a schematic structural diagram of a polycrystalline diamond spherical sliding bearing fixing ring of the present invention;
[0020] Figure 5 This is a schematic diagram of the structure of a rotating ring of a polycrystalline diamond spherical sliding bearing of the present invention;
[0021] Figure 6 This is a schematic diagram of the structure of a polycrystalline diamond spherical sliding bearing seal ring of the present invention;
[0022] Figure 7 This is a schematic diagram of the structure of a movable ring of a polycrystalline diamond spherical sliding bearing of the present invention;
[0023] Figure 8 The present invention is a cross-sectional view of a polycrystalline diamond spherical sliding bearing seal ring.
[0024] Legend:
[0025] 1. Fixed ring; 2. Center groove; 3. Oil filling hole; 4. Closing bolt; 5. Movable ring; 6. Rotating ring; 7. First annular slide groove; 8. Second annular slide groove; 9. Sealing ring; 10. Retaining ring 1; 11. Retaining ring 2; 12. Scraper; 13. Oil guide groove; 14. Slideway 1; 15. Steel ball; 16. Slideway 2; 17. Oil guide hole. DETAILED DESCRIPTION
[0026] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.
[0027] Reference Figure 1-8 The embodiment of the present invention is a polycrystalline diamond spherical sliding bearing and a drilling tool, which include: a fixing ring 1, an outer ring of the bearing, the outer surface of the fixing ring 1 is provided with a center groove 2 for positioning, which is convenient for the installation of the bearing, the center groove 2 is provided with an oil filling hole 3 inside, which is used for filling lubricating oil, and the internal thread of the oil filling hole 3 is connected with a closing bolt 4, which is used to block the oil filling hole 3 to prevent the lubricating oil from overflowing when in use. The inner wall of the fixed ring 1 is provided with a second slideway 16, and the left and right sides of the inner wall of the fixed ring 1 are provided with a second annular slideway 8; the rotating ring 6 is the middle layer of the bearing, which is used to assist the axial rotation of the sliding bearing. An oil guide groove 13 is provided in the middle of the outer surface of the rotating ring 6 for guiding and storing oil. The outer surface of the rotating ring 6 is provided with a slideway 14, and the slideway 14 and the slideway 2 16 are on the same longitudinal section. A steel ball 15 is movably connected between the slideway 14 and the slideway 2 16. Second annular slideways 8 are provided on both sides of the inner wall of the fixed ring 1, and first annular slideways 7 are provided on the left and right end faces of the rotating ring 6. The inner wall of the rotating ring 6 is slidably connected with a movable ring 5. The inner ring of the bearing is used to connect the movable parts of the drilling tool to enable it to move at multiple angles. The outer surface of the movable ring 5 is in contact with the inner surface of the rotating ring 6 to form a spherical friction pair, and the contact surfaces of the movable ring 5 and the rotating ring 6 are provided with a polycrystalline diamond layer.
[0028] The sealing ring 9 is used to prevent the lubricating oil from overflowing and the dirt from penetrating. There are two groups of sealing rings 9, which are respectively located on the left and right sides of the rotating ring 6. The outer surfaces of the two groups of sealing rings 9 can be fixedly connected with a retaining ring 10, which is in the form of a rubber-coated steel ring, used to flexibly connect one side of the sealing ring 9 with the side of the fixed ring 1. When in use, it is not subject to radial and axial loads. The outer surfaces of the two groups of sealing rings 9 are fixedly connected with a retaining ring 2 11, which is in the form of a rubber-coated steel ring, used to flexibly connect one side of the sealing ring 9 with the inner surface of the rotating ring 6. When in use, it is not subject to radial and axial loads. The retaining ring 10 is slidably connected to the second annular groove 8, and the retaining ring 2 11 is slidably connected to the first annular groove 7. The outer surfaces of the two groups of sealing rings 9 are fixedly connected with scrapers 12, which are used to scrape off dirt invading from the outside and play a sealing role. The outer surface of the rotating ring 6 and the inner surface of the fixed ring 1 are in contact with each other to form a spherical friction pair, and the contact surfaces of the rotating ring 6 and the fixed ring 1 are provided with a polycrystalline diamond layer. The center groove 2 and the oil guide groove 13 are on the same longitudinal section, the oil filling hole 3 is connected to the oil guide groove 13, and the oil guide hole 17 is provided inside the oil guide groove 13, and the oil guide hole 17 is connected to the outer surface of the movable ring 5. The two sets of sealing rings 9 are distributed in left and right mirror images, and the two sets of scrapers 12 are slidably connected to the left and right outer surfaces of the movable ring 5 respectively.
[0029] There are two slideways 14, which are equidistantly distributed on the left and right sides of the oil guide groove 13. There are two slideways 16, which are aligned with the two slideways 14. There are two groups of sixty steel balls 15, which are located between the two slideways 14 and the slideway 2 16.
[0030] The drilling tool comprises the polycrystalline diamond spherical sliding bearing according to any one of claims 1 to 7.
[0031] Working principle: When in use, the sliding bearing is installed on the rotating shaft of the drill bit, and the movable ring 5 is inserted into the rotating shaft for assembly, and the fixed ring 1 is installed inside the shaft seat. Before use, the lubricating oil is injected into the oil filling hole 3 by opening the closing bolt 4. At this time, the lubricating oil enters the oil guide hole 17 through the oil guide groove 13, so that the lubricating oil reaches the contact surface between the movable ring 5 and the rotating ring 6. At the same time, when the lubricating oil is added, it enters the slideway 1 14 and the slideway 2 16 on both sides through the gap between the fixed ring 1 and the rotating ring 6, and overflows into the sealing rings 9 on both sides, so that the first annular slide groove 7 and the second annular slide groove 8 are lubricated.
[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.
Claims
1. A polycrystalline diamond spherical sliding bearing, characterized in that: include: A fixing ring (1), wherein the outer surface of the fixing ring (1) is provided with a central groove (2), the interior of the central groove (2) is provided with an oil injection hole (3), the interior of the oil injection hole (3) is threadedly connected with a closing bolt (4), the inner wall of the fixing ring (1) is provided with a second slideway (16), and the inner wall of the fixing ring (1) is provided with a second annular slideway (8) on both sides; A rotating ring (6), wherein an oil guide groove (13) is provided at the center of the outer surface of the rotating ring (6), a slideway 1 (14) is provided on the outer surface of the rotating ring (6), the slideway 1 (14) and the slideway 2 (16) are on the same longitudinal section, a steel ball (15) is movably connected between the slideway 1 (14) and the slideway 2 (16), second annular slide grooves (8) are provided on both sides of the inner wall of the fixed ring (1), and first annular slide grooves (7) are provided on the left and right end surfaces of the rotating ring (6), and a movable ring (5) is slidably connected to the inner wall of the rotating ring (6); A sealing ring (9), wherein the sealing ring (9) is provided with two groups, and the two groups of sealing rings (9) are respectively located on the left and right sides of the rotating ring (6), and the outer surfaces of the two groups of sealing rings (9) can be fixedly connected with a retaining ring 1 (10), and the outer surfaces of the two groups of sealing rings (9) are fixedly connected with a retaining ring 2 (11), the retaining ring 1 (10) is slidably connected to the second annular groove (8), and the retaining ring 2 (11) is slidably connected to the first annular groove (7), and the outer surfaces of the two groups of sealing rings (9) are fixedly connected with a scraper (12).
2. The polycrystalline diamond spherical sliding bearing according to claim 1, characterized in that: The outer surface of the movable ring (5) and the inner surface of the rotating ring (6) are in contact and cooperate with each other to form a spherical friction pair, and the contact surfaces of the movable ring (5) and the rotating ring (6) are both provided with a polycrystalline diamond layer.
3. A polycrystalline diamond spherical sliding bearing and drilling tool according to claim 1, characterized in that: The outer surface of the rotating ring (6) contacts and cooperates with the inner surface of the fixed ring (1) to form a spherical friction pair, and the contact surfaces of the rotating ring (6) and the fixed ring (1) are both provided with a polycrystalline diamond layer.
4. A polycrystalline diamond spherical sliding bearing and drilling tool according to claim 1, characterized in that: The central groove (2) and the oil guide groove (13) are on the same longitudinal section, the oil filling hole (3) is connected to the oil guide groove (13), an oil guide hole (17) is provided inside the oil guide groove (13), and the oil guide hole (17) is connected to the outer surface of the movable ring (5).
5. The polycrystalline diamond spherical sliding bearing and drilling tool according to claim 1, characterized in that: The two groups of sealing rings (9) are distributed in a left and right mirror image manner, and the two groups of scrapers (12) are respectively slidably connected to the left and right outer surfaces of the movable ring (5).
6. A polycrystalline diamond spherical sliding bearing and drilling tool according to claim 1, characterized in that: There are two slideways one (14), and the two slideways one (14) are equidistantly distributed on the left and right sides of the oil guide groove (13); there are two slideways two (16), and the two slideways two (16) are respectively aligned with the two slideways one (14).
7. A polycrystalline diamond spherical sliding bearing and drilling tool according to claim 1, characterized in that: The steel balls (15) are provided in two groups, each group having sixty balls, and the two groups of steel balls (15) are respectively located between the two slideways 1 (14) and 2 (16).
8. A drilling tool, characterized in that: It comprises the polycrystalline diamond spherical sliding bearing as claimed in any one of claims 1 to 7.