CN217977061U - Diamond compact, bearing outer ring, bearing inner ring and PDC bearing - Google Patents
Diamond compact, bearing outer ring, bearing inner ring and PDC bearing Download PDFInfo
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- CN217977061U CN217977061U CN202222395452.7U CN202222395452U CN217977061U CN 217977061 U CN217977061 U CN 217977061U CN 202222395452 U CN202222395452 U CN 202222395452U CN 217977061 U CN217977061 U CN 217977061U
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- cambered surface
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Abstract
The utility model provides a diamond compact piece, bearing outer ring, bearing inner ring and PDC bearing. The diamond compact comprises a hard alloy substrate and a polycrystalline diamond layer which are sequentially arranged along the thickness direction of the diamond compact, and the working surface of the polycrystalline diamond layer is a first cambered surface; the joint surface of the hard alloy matrix and the polycrystalline diamond layer comprises a second cambered surface; the first cambered surface and the second cambered surface are both concave cambered surfaces and the concave directions of the first cambered surface and the second cambered surface are the same, or the first cambered surface and the second cambered surface are both convex cambered surfaces and the convex directions of the first cambered surface and the second cambered surface are the same; the center line of the first cambered surface is parallel to the center line of the second cambered surface; the periphery of the diamond compact is provided with a first identification feature. The bearing outer ring includes a first support ring and a first diamond compact. The bearing inner ring comprises a second support ring and a second diamond compact. The PDC bearing includes a bearing outer ring and a bearing inner ring. The utility model discloses make PDC bearing life extension, and change in the installation.
Description
Technical Field
The utility model relates to a bearing technical field, concretely relates to PDC bearing, its diamond compact piece, its bearing outer ring and bearing inner ring that have improved mechanical properties and more do benefit to the assembly.
Background
The existing PDC bearing comprises a bearing outer ring and a bearing inner ring, wherein the bearing outer ring and the bearing inner ring respectively comprise corresponding support rings and a plurality of diamond compacts. Diamond compact is wholly cylindrical, and diamond compact includes carbide base member and polycrystalline diamond layer, and polycrystalline diamond layer is equipped with back to back the working surface of carbide base member, according to the difference of bearing outer ring and bearing inner ring, working surface can be processed into indent cambered surface or evagination cambered surface correspondingly, and diamond compact's evagination cambered surface is gone up to bearing outer ring's indent cambered surface and bearing inner ring on diamond compact's the bearing outer ring.
The conventional PDC bearing has the problems that the working surface of the diamond compact is a convex surface or a concave surface, but the joint surface of the hard alloy matrix and the polycrystalline diamond layer is a plane, so that the thickness of the polycrystalline diamond layer is uneven, and the polycrystalline diamond layer is easily damaged due to uneven stress during working; in addition, as the key fitting piece of bearing, for guaranteeing that evagination cambered surface and indent cambered surface cooperation are errorless, the installation angle requirement of the diamond compact piece is higher, and because current diamond compact piece is cylindrically, be difficult to during the installation make quick and accurate judgement to its mounted position accurately, influence production efficiency and production quality then.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a guarantee polycrystalline diamond layer thickness evenly and have certain position recognition's diamond compact, but its inside atress condition is improved increase of service life, easily installation simultaneously.
A second object of the present invention is to provide a bearing outer ring of a PDC bearing which is durable and easy to install.
A third object of the present invention is to provide a bearing inner ring of a durable and easy-to-install PDC bearing.
A fourth object of the present invention is to provide a PDC bearing which is durable and easy to assemble.
The utility model discloses the diamond composite sheet that the first purpose provided includes along the carbide base member and the polycrystalline diamond layer that self thickness direction set gradually, the polycrystalline diamond layer is equipped with the working surface back to the carbide base member, the working surface is the first cambered surface; the joint surface of the hard alloy matrix and the polycrystalline diamond layer comprises a second cambered surface; the first cambered surface and the second cambered surface are both inwards concave cambered surfaces and the concave directions of the first cambered surface and the second cambered surface are the same, or the first cambered surface and the second cambered surface are outwards convex cambered surfaces and the convex directions of the first cambered surface and the second cambered surface are the same; the center line of the first cambered surface is parallel to the center line of the second cambered surface; the outer periphery of the diamond compact is provided with a first identifying feature comprising a first pattern feature and/or a first profile feature.
According to the scheme, firstly, the joint surface of the hard alloy matrix and the polycrystalline diamond layer is set to be the concave surface or the convex surface corresponding to the working surface, the thickness of each part of the polycrystalline diamond layer can be closer by the arrangement, the strength of each part of the polycrystalline diamond layer is uniform, the internal stress is more uniform, and the stress concentration is avoided; then, in order to do benefit to install diamond compact piece on the support ring of bearing faster and accurately, the utility model discloses set up first discernment characteristic at diamond compact piece, the discernment characteristic can be the pattern feature that does benefit to the quick discernment of vision, also can do benefit to the quick discernment of sense of touch and can be used for location fit's profile feature. Therefore, the utility model discloses an inside atress condition of diamond compact is improved and can increase of service life, easily installation simultaneously.
The further scheme is that the diameter of the second cambered surface is equal to that of the first cambered surface, or the center line of the first cambered surface is superposed with that of the second cambered surface.
Therefore, the thicknesses of all parts of the polycrystalline diamond layer can be further equal in the two arrangement modes, and the internal stress condition of the polycrystalline diamond layer is further improved.
The other one of the hard alloy matrix and the polycrystalline diamond layer is provided with a concave position, and the protrusion is matched with the concave position; the connection part of the convex part and the concave part is exposed out of the periphery of the diamond compact to form a first pattern characteristic.
From top to bottom, under this setting, need not to increase pattern spraying or sculpture technology, do not increase the manufacturing degree of difficulty and slow down the production beat under the prerequisite can form the first pattern characteristic that has the visual identification effect in diamond compact's periphery, and protruding and concave position's cooperation can also promote the bonding strength between carbide base member and the polycrystalline diamond layer.
Still further, the protrusions and depressions extend radially of the diamond compact between opposite sides of the outer periphery of the diamond compact.
It is thus clear that this sets up the first discernment characteristic in periphery formation two places of diamond compact down, and the combination of the first discernment characteristic in two places can further do benefit to and make more accurate judgement to the mounted position, and this sets up processing or the shaping that does benefit to protruding and concave position, also avoids forming stress concentration in protruding and concave position department.
The periphery of the diamond compact is provided with an edge, and the edge is arranged on the hard alloy matrix and/or the polycrystalline diamond layer; a first profile feature is formed at the edge arrangement.
Therefore, under the arrangement, when the diamond compact is arranged on the support ring, the edge can be matched with the other edge in the mounting position on the support ring, the mounting angle of the diamond compact is unique, and the good fool-proof effect is achieved.
The utility model provides a bearing outer ring which comprises a first supporting ring and a plurality of first diamond composite sheets fixed on the first supporting ring; the first diamond composite sheet is the diamond composite sheet, and the first cambered surface is an inwards concave cambered surface; the first support ring is provided with a first preset position, and the first identification characteristic corresponds to the first preset position.
A second identification feature is arranged on the first preset position, and the second identification feature comprises a second pattern feature and/or a second outline feature; the first identification feature is coordinated with the second identification feature.
According to the scheme, the diamond composite sheet of the utility model is adopted to make the bearing outer ring more durable; and be equipped with on first support ring and be used for with first identification feature complex second identification feature, install the diamond compact piece back in the installation position, can adjust the diamond compact piece rapidly, first identification feature aims at the second identification feature promptly and installs the angle accuracy, and this setting makes the installation of diamond compact piece easier and guarantees the installation accuracy.
The third purpose of the utility model is to provide a bearing inner ring, which comprises a second support ring and a plurality of second diamond compacts fixed on the second support ring; the second diamond composite sheet adopts the diamond composite sheet, and the first cambered surface is an outward-convex cambered surface; and a second preset position is arranged on the second support ring, and the first identification characteristic corresponds to the second preset position.
A third identification feature is arranged on a second preset position, and the third identification feature comprises a third pattern feature and/or a third outline feature; the first identification feature is coordinated with the third identification feature.
According to the scheme, the diamond composite sheet of the utility model is adopted to make the bearing outer ring more durable; and the second support ring is provided with a third identification feature matched with the first identification feature, after the diamond composite sheet is installed at the installation position, the diamond composite sheet can be rapidly adjusted, the first identification feature is aligned with the third identification feature, namely, the installation angle is accurate, and the arrangement ensures that the diamond composite sheet is installed more easily and the installation accuracy is ensured.
The fourth object of the present invention is to provide a PDC bearing, which comprises a bearing outer ring and a bearing inner ring, wherein the bearing inner ring is located at the inner periphery of the bearing outer ring; the bearing outer ring adopts the bearing outer ring; the bearing inner ring adopts the bearing inner ring.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the PDC bearing of the present invention.
Fig. 2 is a structural diagram of a first diamond compact in the first embodiment of the PDC bearing.
Fig. 3 is an exploded view of the first diamond compact in the first embodiment of the PDC bearing of the present invention.
Fig. 4 is a structural diagram of a second diamond compact in the first embodiment of the PDC bearing of the present invention.
Fig. 5 is an exploded view of a second diamond compact according to the first embodiment of the PDC bearing of the present invention.
Fig. 6 is a cross-sectional view of the cemented carbide substrate of the diamond compact according to the second embodiment of the PDC bearing of the present invention.
Detailed Description
First embodiment of PDC bearing
Referring to fig. 1, the PDC bearing of the present embodiment includes a bearing outer ring 1001 and a bearing inner ring 1002, and the bearing inner ring 1002 is located on the inner periphery of the bearing outer ring 1001. The bearing outer ring 1001 includes a first support ring 1 and a plurality of first diamond compacts 2 fixedly welded on the first support ring 1, and the bearing inner ring 1002 includes a second support ring 3 and a plurality of second diamond compacts 4 fixedly welded on the second support ring 3. In order to avoid the occurrence of the seizure due to the simultaneous alignment of the plurality of first diamond compacts 2 and the plurality of second diamond compacts 4, the number of the first diamond compacts 2 should be different from the number of the second diamond compacts 4, and in this embodiment, the number of the second diamond compacts 4 is one less than that of the first diamond compacts 2. Wherein, first diamond compact piece 2 and second diamond compact piece 4 all adopt the utility model discloses a diamond compact piece.
Referring to fig. 2 and 3, the z-axis direction shown in fig. 2 is the thickness direction of the first diamond compact 2, the first diamond compact 2 includes a first cemented carbide substrate 22 and a first polycrystalline diamond layer 21 which are sequentially arranged along the z-axis forward direction, and the first cemented carbide substrate 22 and the first polycrystalline diamond layer 21 are bonded to a first bonding surface 200.
The outer peripheral surface of the first cemented carbide substrate 22 is a first cylindrical surface 2202, and in the z-axis direction, the end surface of the first cemented carbide substrate 22 is an inward concave arc surface 2203 located on the first joint surface 200. Indent cambered surface 2203 is along the z axle negative direction and is sunken back to first polycrystalline diamond layer 21, and is provided with on the first carbide base member 22 along the z axle negative direction sunken in the first recess 221 of indent cambered surface 2203, first recess 221 does the utility model discloses a concave position, two first recesses 221 set up the both sides at first carbide base member 22 symmetrically, and first recess 221 is along the radial extension 1 millimeter of first carbide base member 22 and run through to the periphery of first carbide base member 22, along the extending direction of first recess 221, and the cross-section of first recess 221 is semi-circular.
The outer periphery of the first polycrystalline diamond layer 21 is a second cylindrical surface 2102, and the second cylindrical surface 2102 and the first cylindrical surface 2202 form a cylindrical outer periphery of the first diamond compact 2. In the z-axis direction, opposite ends of the first polycrystalline diamond layer 21 are a first bottom surface 2103 and a first working surface 2101, the first bottom surface 2103 is located at the first joint surface 200, and the first bottom surface 2103 is an arc surface protruding in the negative direction along the z-axis. First polycrystalline diamond layer 21 still includes along the protruding first arch 211 in first bottom surface 2103 of z axle negative going, and first arch 211 is the utility model discloses a protruding, two first archs 211 set up the both sides in first polycrystalline diamond layer 21 symmetrically, and first arch 211 is along the periphery of radial extension 1 millimeter of first polycrystalline diamond layer 21 and run through to first polycrystalline diamond layer 21, along the extending direction of first arch 211, and the cross-section of first arch 211 is semi-circular. First working surface 2101 does the utility model discloses a first cambered surface, first working surface 2101 are the indent cambered surface, and first working surface 2101 is along the negative-going sunken of z axle.
Referring to fig. 2, the first bottom surface 2103 and the concave arc surface 2203 are joined at the first joining surface 200, and the first bottom surface 2103 and the concave arc surface 2203 are joined to form a second arc surface of the present invention. The direction of the depression of the first working surface 2101 and the direction of the depression of the second arc surface formed by joining the first bottom surface 2103 and the concave arc surface 2203 are both negative z-axis directions, and the centerline of the first working surface 2101 and the centerline of the second arc surface are parallel to each other. Further, it is preferable that the diameter of the second arc surface is equal to the diameter of the first working surface 2101, or that the center line of the second arc surface coincides with the center line of the first working surface 2101. The center line of the first working surface 2101 refers to the center line of the cylindrical surface where the first working surface 2101 is located, and the center line of the second cambered surface refers to the center line of the cylindrical surface where the second cambered surface is located.
In addition, referring to fig. 2, the first protrusion 211 is connected to the first groove 221, and since the first protrusion 211 and the first groove 221 both extend to the outer periphery of the first diamond compact 2, a first pattern feature 201 with a semicircular line is formed at the connection position of the first protrusion 211 and the first groove 221, and is exposed on the outer periphery of the first diamond compact 2.
Referring to fig. 2, 4 and 5, the second diamond compact 4 is similar to the first diamond compact 2, and the second diamond compact 4 comprises a second hard alloy substrate 42 and a second polycrystalline diamond layer 41 which are arranged in sequence along the thickness direction of the second diamond compact, and the second hard alloy substrate 42 and the second polycrystalline diamond layer 41 are jointed to a second jointing surface 400.
The outer peripheral surface of the second cemented carbide substrate 42 is a third cylindrical surface 4202, and the end surface of the second cemented carbide substrate 42 in the thickness direction of the second diamond compact 4 is an outwardly convex curved surface 4203 located on the second joint surface 400. The evagination cambered surface 4203 is protruding towards second polycrystalline diamond layer 41 along thickness direction, and is provided with on the second carbide base member 42 along thickness direction and the second recess 421 that the second polycrystalline diamond layer 41 caves in evagination cambered surface 4203 dorsad, and second recess 421 is the utility model discloses a concave position, two second recesses 421 symmetrically set up the both sides at second carbide base member 42, and second recess 421 is along the radial extension 1 millimeter of second carbide base member 42 and run through to the periphery of second carbide base member 42, and along the extending direction of second recess 421, the cross-section of second recess 421 is semi-circular.
The outer peripheral surface of the second polycrystalline diamond layer 41 is a fourth cylindrical surface 4102, and the fourth cylindrical surface 4102 and the third cylindrical surface 4202 constitute the cylindrical outer peripheral outline of the second diamond compact 4. In the thickness direction of the second diamond compact 4, the two opposite ends of the second polycrystalline diamond layer 41 are a second bottom surface 4103 and a second working surface 4101, the second bottom surface 4103 is located at the second joint surface 400, and the second bottom surface 4103 is an arc surface recessed along the thickness direction and facing away from the second cemented carbide substrate 42. The second polycrystalline diamond layer 41 still includes along thickness direction and towards the protruding second arch 411 in second bottom surface 4103 of second carbide base member 42, the protruding second 411 does the utility model discloses a protruding, two protruding second 411 sets up the both sides at second polycrystalline diamond layer 41 symmetrically, the protruding second 411 radially extends 1 millimeter and runs through to the periphery of second polycrystalline diamond layer 41 along second polycrystalline diamond layer 41, along the protruding extending direction of second 411, the cross-section of the protruding second 411 is semi-circular. Second working surface 4101 is the first cambered surface of the present invention, second working surface 4101 is an outer convex cambered surface, and second working surface 4101 is convex along the thickness direction and back to second cemented carbide substrate 42.
The second bottom surface 4103 and the convex arc surface 4203 are joined to the second joint surface 400, and the second bottom surface 4103 and the convex arc surface 4203 are joined to form a second arc surface of the present invention. The outward protruding direction of the second working surface 4101 is the same as the outward protruding direction of the second arc surface formed by the junction of the second bottom surface 4103 and the outward protruding arc surface 4203, and the center line of the second working surface 4101 is parallel to the center line of the second arc surface. Further, it is preferable that the diameter of the second arc is equal to the diameter of the second working surface 4101, or the centerline of the second arc coincides with the centerline of the second working surface 4101. The center line of the second working surface 4101 refers to the center line of the cylindrical surface where the second working surface 4101 is located, and the center line of the second arc surface refers to the center line of the cylindrical surface where the second arc surface is located. In addition, the joint of the second protrusion 411 and the second groove 421 forms a second pattern feature 401 with a semicircular line exposed on the outer circumferential surface of the second diamond compact 4.
Referring to fig. 2 and 4, the utility model discloses a diamond composite sheet, corresponding to its working surface's evagination or indent, the composition surface between its two material layers also sets up to evagination or indent unanimous with the working surface equally, first working surface 2101 and first composition surface 200 of first diamond composite sheet 2 are the indent cambered surface of equidirectional depression, second working surface 4101 and second composition surface 400 of second diamond composite sheet 4 are the evagination cambered surface of equidirectional evagination, this setting enables polycrystalline diamond layer thickness everywhere and is closer, polycrystalline diamond layer intensity everywhere is even, inside atress is more even and avoid stress concentration to produce.
Referring to fig. 1, since the first pattern feature 201 and the second picture recognition feature 401 are respectively disposed on the first diamond compact 2 and the second diamond compact 4, when the first diamond compact 2 and the second diamond compact 4 are respectively mounted on the corresponding first support ring 1 and the second support ring 3, a visual system of a worker or an automated robot can rapidly align the first pattern feature 201 with a first preset position on the first support ring 1, and similarly, can rapidly align the second pattern feature 401 with a second preset position on the second support ring 3, thereby ensuring accuracy of mounting the first preset position on the first preset position first support ring 1 on the first diamond compact 2 and the first diamond compact 4, and ensuring product production quality.
Preferably, the first preset position on the first support ring 1 is provided with a second pattern feature, and the second preset position on the second support ring 3 is provided with a third pattern feature, so that the arrangement can further easily align the installation position of the diamond compact.
Second embodiment of PDC bearing
Referring to fig. 6, in the present embodiment, the outer periphery of the cemented carbide substrate 52 of the diamond compact 5 is provided with a cut-out portion 501, and a plane and two edges located at two side edges of the plane are formed at the cut-out portion 501 at the outer periphery of the cemented carbide substrate 52. The cut-out portion 501 is a contour recognition feature in the present embodiment. The hard alloy substrate 52 is provided with the D-shaped outline, the D-shaped outline is arranged on the inner outline of the mounting position on the support ring of the PDC bearing, the mounting angle of the diamond composite sheet 5 is unique when the diamond composite sheet 5 is mounted, the mounting accuracy of the diamond composite sheet 5 can be guaranteed through the arrangement, and the production quality of products is guaranteed.
Further, preferably, the cut-out 501 is provided only in the cemented carbide substrate 52, while the polycrystalline diamond layer of the diamond compact 5 maintains a circular outer peripheral profile, thereby ensuring its operational performance integrity and effectiveness. Preferably, the cutout portion 501 is provided only in the lower portion of the cemented carbide substrate 52 in the thickness direction of the diamond compact 5, while the upper portion of the cemented carbide substrate 52 maintains the original circular outer peripheral profile, thereby securing the bonding strength between the cemented carbide substrate 52 and the polycrystalline diamond layer.
In other embodiments, only one protrusion and depression is provided on the outer periphery of the diamond compact.
Finally, it should be emphasized that the above-described embodiments are merely preferred examples of the present invention, and are not intended to limit the invention, as those skilled in the art will appreciate that various changes and modifications may be made, and any and all modifications, equivalents, and improvements made, while remaining within the spirit and principles of the present invention, are intended to be included within the scope of the present invention.
Claims (10)
1. The diamond compact comprises a hard alloy matrix and a polycrystalline diamond layer which are sequentially arranged along the thickness direction of the diamond compact, wherein the polycrystalline diamond layer is provided with a working surface back to the hard alloy matrix, and the working surface is a first cambered surface;
the method is characterized in that:
the joint surface of the hard alloy matrix and the polycrystalline diamond layer comprises a second cambered surface;
the first cambered surface and the second cambered surface are both concave cambered surfaces and the concave directions of the first cambered surface and the second cambered surface are the same, or the first cambered surface and the second cambered surface are both convex cambered surfaces and the convex directions of the first cambered surface and the second cambered surface are the same;
the center line of the first cambered surface is parallel to the center line of the second cambered surface; the periphery of the diamond compact is provided with a first identifying feature, the first identifying feature comprising a first pattern feature and/or a first profile feature.
2. The diamond compact of claim 1, wherein:
the diameter of the second cambered surface is equal to that of the first cambered surface, or the center line of the first cambered surface is superposed with that of the second cambered surface.
3. The diamond compact of claim 1 or 2, wherein:
at the joint surface, a bump is arranged on one of the hard alloy matrix and the polycrystalline diamond layer, a concave position is arranged on the other of the hard alloy matrix and the polycrystalline diamond layer, and the bump is matched with the concave position;
the joint of the protrusion and the concave position is exposed out of the periphery of the diamond compact to form the first pattern feature.
4. The diamond compact of claim 3, wherein:
the arch with concave position is followed diamond compact's radial extension in between the relative both sides of diamond compact's periphery.
5. The diamond compact of claim 1 or 2, wherein:
the periphery of the diamond compact is provided with an edge, and the edge is arranged on the hard alloy matrix and/or the polycrystalline diamond layer;
the first profile feature is formed at the edge arrangement.
6. The bearing outer ring comprises a first support ring and a plurality of first diamond compacts fixed on the first support ring;
the method is characterized in that:
the first diamond compact is the diamond compact of any one of the claims 1 to 5, and the first cambered surface is a concave cambered surface;
the first support ring is provided with a first preset position, and the first identification feature corresponds to the first preset position.
7. The bearing outer ring of claim 6, wherein:
a second identification feature is arranged on the first preset position, and the second identification feature comprises a second pattern feature and/or a second outline feature;
the first identification feature cooperates with the second identification feature.
8. The bearing inner ring comprises a second support ring and a plurality of second diamond compacts fixed on the second support ring;
the method is characterized in that:
the second diamond compact is the diamond compact of any one of the claims 1 to 5, and the first cambered surface is an outward cambered surface;
and a second preset position is arranged on the second support ring, and the first identification characteristic corresponds to the second preset position.
9. The bearing inner ring of claim 8, wherein:
a third identification feature is arranged on the second preset position, and the third identification feature comprises a third pattern feature and/or a third outline feature;
the first identification feature is mated with the third identification feature.
A PDC bearing including a bearing outer ring and a bearing inner ring, the bearing inner ring being located at an inner circumference of the bearing outer ring;
the method is characterized in that:
the bearing outer ring adopts the bearing outer ring of the claim 6 or 7;
the bearing inner ring is the bearing inner ring of the above claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222395452.7U CN217977061U (en) | 2022-09-08 | 2022-09-08 | Diamond compact, bearing outer ring, bearing inner ring and PDC bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222395452.7U CN217977061U (en) | 2022-09-08 | 2022-09-08 | Diamond compact, bearing outer ring, bearing inner ring and PDC bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217977061U true CN217977061U (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222395452.7U Active CN217977061U (en) | 2022-09-08 | 2022-09-08 | Diamond compact, bearing outer ring, bearing inner ring and PDC bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217977061U (en) |
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2022
- 2022-09-08 CN CN202222395452.7U patent/CN217977061U/en active Active
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