CN212360505U - PDC bearing outer ring assembly, PDC bearing inner ring assembly and PDC bearing - Google Patents
PDC bearing outer ring assembly, PDC bearing inner ring assembly and PDC bearing Download PDFInfo
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- CN212360505U CN212360505U CN202021554827.4U CN202021554827U CN212360505U CN 212360505 U CN212360505 U CN 212360505U CN 202021554827 U CN202021554827 U CN 202021554827U CN 212360505 U CN212360505 U CN 212360505U
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Abstract
The utility model provides a PDC bearing outer ring subassembly, PDC bearing inner ring subassembly and PDC bearing, PDC bearing outer ring subassembly and PDC bearing inner ring subassembly all include the support ring and install a plurality of polycrystalline diamond compact on the installation through-hole of support ring, and the installation through-hole is the shoulder hole, and polycrystalline diamond compact is for having two sections structures that the external diameter is poor. The PDC bearing includes a PDC bearing outer ring assembly and a PDC bearing inner ring assembly. The utility model provides a PDC bearing effectively reduces the location degree of difficulty and the welding degree of difficulty, improves production efficiency.
Description
Technical Field
The utility model relates to a bearing technical field, concretely relates to PDC bearing outer ring subassembly, PDC bearing inner ring subassembly and PDC bearing.
Background
The existing PDC bearing comprises a PDC bearing outer ring assembly and a PDC bearing inner ring assembly, wherein the PDC bearing outer ring assembly and the PDC bearing inner ring assembly respectively comprise a support ring and a plurality of polycrystalline diamond compacts. The polycrystalline diamond compact is cylindrical and comprises a hard alloy matrix layer and a polycrystalline diamond layer. Taking the PDC bearing outer ring assembly as an example, a plurality of circular blind holes are arranged on the inner peripheral surface of the support ring, and the blind holes are used for embedding and welding the polycrystalline diamond compact.
The installation of support ring and polycrystalline diamond compact and the difficult problem of welding have the location when welding to this kind of present PDC bearing, take PDC bearing outer ring subassembly as an example, polycrystalline diamond compact inserts the blind hole of support ring from the interior week of support ring after, need follow the interior week of support ring to polycrystalline diamond compact location, and need weld support ring and polycrystalline diamond compact from the interior week of support ring simultaneously, this sets up and makes location operation and welding operation produce the interact, increase location and the welding degree of difficulty, and polycrystalline diamond compact can only insert one by one and weld.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide an effectively reduce PDC bearing outer ring subassembly of the welding degree of difficulty.
A second object of the utility model is to provide an effectively reduce PDC bearing inner ring subassembly of the welding degree of difficulty.
A third object of the present invention is to provide a PDC bearing with reduced welding difficulty.
The utility model discloses a first purpose provides a PDC bearing outer ring component which comprises a first support ring and a plurality of first polycrystalline diamond compact sheets fixed on the first support ring; the first support ring is provided with a plurality of first mounting through holes which penetrate through the first support ring along the radial direction of the first support ring, the first mounting through holes are provided with a first hole section and a second hole section which are sequentially communicated in the penetrating direction of the first mounting through holes, the first inner diameter of the first hole section is larger than the second inner diameter of the second hole section, and the first hole section is close to the axis of the first support ring relative to the second hole section; the first polycrystalline diamond compact comprises a first hard alloy matrix layer and a first polycrystalline diamond layer; in the axial direction of the first polycrystalline diamond compact, the first hard alloy substrate layer comprises a first extension section and a second extension section which are sequentially connected, the outer diameter of the first extension section is larger than that of the second extension section, the first extension section is provided with a first extension end part far away from the second extension section, the second extension section is provided with a second extension end part far away from the first extension section, the first polycrystalline diamond layer is positioned on the first extension end part, and a first working surface back to the first extension section is arranged on the first polycrystalline diamond layer; the first extension section is inserted in the first hole section, the second extension section is inserted in the second hole section, the first working surface protrudes from the inner periphery of the first support ring, and the second extension end is welded with the first support ring.
According to the scheme, the first installation through hole formed in the first support ring is a stepped hole and comprises a first hole section and a second hole section with inner diameter difference, the first hole section with the larger inner diameter is close to the inner periphery of the first support ring, correspondingly, the outline of the first polycrystalline diamond compact is stepped, after the first polycrystalline diamond compact is installed on the first installation through hole, the first polycrystalline diamond compact is matched with the stepped hole, the degree of freedom of the first polycrystalline diamond compact moving back to the axis in the radial direction is limited, and after the first polycrystalline diamond compact is located by the aid of the locating tool from the inner periphery, the first polycrystalline diamond compacts are effectively located simultaneously. And because the welding point between first polycrystalline diamond compact and the first support ring changes the periphery of first support ring into, go on in the periphery of first support ring when welding, so can not influence each other between welding tool and the positioning tool, and can accomplish after a location the welding of a plurality of first polycrystalline diamond compacts, consequently effectively reduce the welding degree of difficulty, improve production efficiency.
In a further aspect, the first support ring forms a first step surface between the first bore section and the second bore section, the first cemented carbide substrate layer forms a second step surface between the first extension section and the second extension section, and the first step surface and the second step surface abut against each other in a radial direction of the first support ring.
It is thus clear that after adopting positioning tool to fix a position first polycrystalline diamond compact from interior week, first step face and positioning tool then carry on spacingly from radial relative both sides to first polycrystalline diamond compact to improve the stability of location.
The further scheme is that the first working surfaces are concave arc surfaces, and the first working surfaces on the first polycrystalline diamond compacts are located on the same circumferential surface.
The utility model discloses a PDC bearing inner ring subassembly that the second purpose provided includes the second support ring and fixes a plurality of second polycrystal diamond compact pieces on the second support ring; the second support ring is provided with a plurality of second mounting through holes which penetrate through the second support ring along the radial direction of the second support ring, the second mounting through holes are provided with a third hole section and a fourth hole section which are sequentially communicated in the penetrating direction of the second mounting through holes, the third inner diameter of the third hole section is larger than the fourth inner diameter of the fourth hole section, and the third hole section is far away from the axis of the second support ring relative to the fourth hole section; the second polycrystalline diamond compact comprises a second hard alloy substrate layer and a second polycrystalline diamond layer; in the axial direction of the second polycrystalline diamond compact, the second hard alloy base layer comprises a third extending section and a fourth extending section which are sequentially connected, the outer diameter of the third extending section is larger than that of the fourth extending section, the third extending section is provided with a third extending end part far away from the fourth extending section, the fourth extending section is provided with a fourth extending end part far away from the third extending section, the second polycrystalline diamond layer is positioned on the third extending end part, and a second working surface facing away from the third extending section is arranged on the second polycrystalline diamond layer; the third extension section is inserted in the third hole section, the fourth extension section is inserted in the fourth hole section, the second working surface protrudes out of the periphery of the second support ring, and the fourth extension end is welded with the second support ring.
According to the scheme, the second mounting through hole formed in the second support ring is a stepped hole and comprises a third hole section and a fourth hole section with inner diameter difference, the third hole section with the larger inner diameter is close to the periphery of the second support ring, correspondingly, the outline of the second polycrystalline diamond compact is stepped, after the second polycrystalline diamond compact is mounted on the second mounting through hole, the second polycrystalline diamond compact is matched with the stepped hole, the degree of freedom of the second polycrystalline diamond compact moving towards the axis in the radial direction is limited, and after the second polycrystalline diamond compact is positioned by the positioning tool from the periphery, the second polycrystalline diamond compacts are effectively positioned simultaneously. And because the welding point between second polycrystalline diamond compact and the second support ring changes the interior circumference of second support ring into, go on at the interior circumference of second support ring when welding, so can not influence each other between welding tool and the positioning tool, and can accomplish after once fixing a position the welding of a plurality of second polycrystalline diamond compacts, consequently effectively reduce the welding degree of difficulty, improve production efficiency.
In a further scheme, a third step surface is formed between the third hole section and the fourth hole section by the second support ring, a fourth step surface is formed between the third extending section and the fourth extending section by the second hard alloy matrix layer, and the third step surface and the fourth step surface are mutually abutted in the radial direction of the second support ring.
It is thus clear that, after adopting positioning tool to fix a position second poly crystal diamond compact piece from the periphery, third step face and positioning tool then carry out spacingly from radial relative both sides to second poly crystal diamond compact piece to improve the stability of location.
The second working surface is an outer convex cambered surface, and the second working surfaces on the second polycrystalline diamond compacts are located on the same circumferential surface.
The third purpose of the utility model is to provide a PDC bearing, which comprises a PDC bearing outer ring component and a PDC bearing inner ring component, wherein the PDC bearing inner ring component is positioned on the inner periphery of the PDC bearing outer ring component; the PDC bearing outer ring component adopts the PDC bearing outer ring component; the PDC bearing inner ring component adopts the PDC bearing inner ring component; the first working surface cooperates with the second working surface.
By the scheme, no matter the outer ring assembly of the PDC bearing and the inner ring assembly of the PDC bearing, when the polycrystalline diamond compact is welded with the support ring, the stepped through holes are formed in the support ring, so that the positioning tool and the welding tool are respectively located on the inner side and the outer side of the support ring, mutual influence between the welding tool and the positioning tool cannot occur, welding of a plurality of second polycrystalline diamond compacts can be completed after one positioning, welding difficulty is effectively reduced, and production efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the PDC bearing of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the PDC bearing outer ring assembly of the present invention.
Fig. 3 is a schematic structural diagram of an embodiment of the inner ring assembly of the PDC bearing of the present invention.
Fig. 4 is a schematic structural diagram of the first embodiment of the PDC bearing welding positioning tool of the present invention.
Fig. 5 is a schematic diagram of the PDC bearing outer ring assembly according to the first embodiment of the PDC bearing welding and positioning tool of the present invention.
Fig. 6 is a schematic structural diagram of a second embodiment of the PDC bearing welding positioning tool of the present invention.
Fig. 7 is a schematic diagram of the PDC bearing inner ring assembly according to the second embodiment of the PDC bearing welding and positioning tool of the present invention.
Detailed Description
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an embodiment of the PDC bearing of the present invention. Fig. 2 is the structural schematic diagram of the outer ring assembly of the PDC bearing according to the present invention, and fig. 3 is the structural schematic diagram of the inner ring assembly of the PDC bearing according to the present invention.
The PDC bearing includes a PDC bearing outer ring assembly 1001 and a PDC bearing inner ring assembly 1002, with the PDC bearing inner ring assembly 1002 located at an inner periphery of the PDC bearing outer ring assembly 1001. The PDC bearing outer ring assembly 1001 includes a first support ring 1 and a plurality of first polycrystalline diamond compacts 2 fixed on the first support ring 1, and the PDC bearing inner ring assembly 1002 includes a second support ring 3 and a plurality of second polycrystalline diamond compacts 4 fixed on the second support ring 3. In order to avoid the multiple first polycrystalline diamond compacts 2 and the multiple second polycrystalline diamond compacts 4 from being aligned to each other at the same time to generate the stuck state, the number of the first polycrystalline diamond compacts 2 should be different from the number of the second polycrystalline diamond compacts 4, and in this embodiment, the number of the second polycrystalline diamond compacts 4 is one less than that of the first polycrystalline diamond compacts 2.
The first polycrystalline diamond compact 2 has a first working surface 203 protruding from the inner periphery of the first support ring 1, the first working surface 203 is the surface of the first polycrystalline diamond layer 202, the first working surface 203 is an inward concave arc surface, and the plurality of first working surfaces 203 on the plurality of first polycrystalline diamond compacts 2 are located on the same circumferential surface. The second polycrystalline diamond compact 4 has a second working surface 403 protruding from the outer periphery of the second support ring 3, the second working surface 403 is the surface of the second polycrystalline diamond layer 402, the second working surface 403 is an outward convex arc surface, and the plurality of second working surfaces 403 on the plurality of second polycrystalline diamond compacts 4 are located on the same circumferential surface. The first working surface 203 cooperates with the second working surface 403.
Referring to FIG. 2, the structure of the PDC bearing outer ring assembly 1001 will first be described. The first support ring 1 is provided with a plurality of first mounting through holes 11 which penetrate through the first support ring 1 along the radial direction of the first support ring 1. In the penetrating direction of the first mounting through hole 11, the first mounting through hole 11 has a first hole section 111 and a second hole section 112 which are sequentially communicated, and the first hole section 111 is close to the axis of the first support ring 1 relative to the second hole section 112.
The first bore section 111 has a first inner diameter larger than a second inner diameter of the second bore section 112, and the first support ring 1 forms a first step surface 113 on the inner wall surface of the first mounting through hole 11 between the first and second bore sections 111 and 112 and facing the first bore section 111 in the radial direction due to the difference in inner diameters between the first and second bore sections 111 and 112. The first mounting through hole 11 arranged in a stepped manner is used for mounting the first polycrystalline diamond compact 2.
The first polycrystalline diamond compact 2 comprises a first hard alloy matrix layer 201 and a first polycrystalline diamond layer 202, and the first polycrystalline diamond compact 2 is formed by sintering diamond micro powder and a hard alloy substrate under the condition of ultrahigh pressure and high temperature. In the axial direction of the first polycrystalline diamond compact 2, the first cemented carbide substrate layer 201 comprises a first extension section 211 and a second extension section 212 which are connected in sequence, the outer diameter of the first extension section 211 is larger than that of the second extension section 212, in the axial direction of the first polycrystalline diamond compact 2, the first extension section 211 is provided with a first extension end part far away from the second extension section 212, the first polycrystalline diamond layer 202 is positioned on the first extension end part, and the first working surface 203, which faces away from the first extension section 211, is arranged on the first polycrystalline diamond layer 202. The second extension 212 has a second extension end 204 remote from the first extension 211, the second extension end 204 being intended to be welded with the first support ring 1.
In addition, since the first extension 211 and the second extension 212 have an outer diameter difference, the first extension 211 and the second extension 212 are connected in a stepped manner, and the first extension 211 having a larger outer diameter forms a second step surface 213 facing in the axial direction of the first cemented carbide base layer 201.
The inlet of the first mounting through hole 11 is located on the inner circumferential surface 101 of the first support ring 1, the first cemented carbide substrate layer 201 is inserted into the first mounting through hole 11 along the radial direction of the first support ring 1 away from the axis of the first support ring 1, the first extension section 211 is inserted into the first hole section 111, the second extension section 212 is inserted into the second hole section 112, the first step surface 213 and the second step surface 113 are in limit fit with each other in the radial direction of the first support ring 1, and the first working surface 203 protrudes out of the inner circumferential surface 101 of the first support ring 1. The second extending end portion 204 reaches the outer peripheral surface 102 of the first support ring 1, and the welding device welds the first support ring 1 and the second extending end portion 204 from the outer periphery of the first support ring 1.
Referring to FIG. 3, the structure of the PDC bearing inner ring assembly 1002 is described below. The second support ring 3 is provided with a plurality of second mounting through holes 31 penetrating through the second support ring 3 along the radial direction of the second support ring 3, in the penetrating direction of the second mounting through holes 31, the second mounting through holes 31 are provided with a third hole section 311 and a fourth hole section 312 which are sequentially communicated, and the third hole section 311 is far away from the axis of the second support ring 3 relative to the fourth hole section 312.
The third bore section 311 has a third inner diameter larger than a fourth inner diameter of the fourth bore section 312, and the second support ring 3 forms a third step surface 313 on the inner wall surface of the second mounting through hole 31 between the third bore section 311 and the fourth bore section 312 and facing the third bore section 311 in the radial direction due to the inner diameter difference between the third bore section 311 and the fourth bore section 312. The second mounting through hole 31 is provided in a stepped shape for mounting the second polycrystalline diamond compact 4.
The second polycrystalline diamond compact 4 comprises a second hard alloy matrix layer 401 and a second polycrystalline diamond layer 402, and the second polycrystalline diamond compact 4 is formed by sintering diamond micro powder and a hard alloy substrate under the condition of ultrahigh pressure and high temperature. In the axial direction of the second polycrystalline diamond compact 4, the second cemented carbide base layer 401 includes a third extension 411 and a fourth extension 412 which are connected in series, the outer diameter of the third extension 411 is larger than that of the fourth extension 412, the third extension 411 has a third extension end portion which is far from the fourth extension 412, the second polycrystalline diamond layer 402 is located on the third extension end portion, and the second polycrystalline diamond layer 402 has the above-mentioned second working surface 403 which faces away from the third extension 411. The fourth extension section 412 has a fourth extension end 404 remote from the third extension section 411, the fourth extension end 404 being intended to be welded with the second support ring 3.
In addition, since the third extension 411 and the fourth extension 412 have an outer diameter difference, the third extension 411 and the fourth extension 412 are connected in a stepped manner, and a fourth step surface 413 facing in the axial direction of the second cemented carbide base layer 401 is formed on the third extension 411 having a larger outer diameter.
The inlet of the second mounting through hole 31 is located on the outer circumferential surface 302 of the second support ring 3. The second polycrystalline diamond compact is inserted into the second mounting through hole 31 from the outer periphery of the second support ring 3 along the radial direction of the second support ring 3, the third extension segment 411 is inserted into the third hole segment 311, the fourth extension segment 412 is inserted into the fourth hole segment 312, the third step surface 313 and the fourth step surface 413 are in limit fit with each other in the radial direction of the second support ring 3, the second working surface 403 protrudes out of the outer peripheral surface 302 of the second support ring 3, the fourth extension end 404 reaches the inner peripheral surface 301 of the second support ring 3, and the welding device welds the second support ring 3 and the fourth extension end 404 from the inner periphery of the second support ring 3 in the radial direction.
Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a first embodiment of the PDC bearing welding positioning tool of the present invention. Fig. 5 is a schematic diagram of the PDC bearing outer ring assembly according to the first embodiment of the PDC bearing welding and positioning tool of the present invention. The utility model discloses still provide the manufacturing approach of PDC bearing, manufacturing approach includes the manufacturing approach of PDC bearing outer ring subassembly 1001, and the manufacturing approach of PDC bearing outer ring subassembly 1001 includes: first, all the first polycrystalline diamond compacts 2 are mounted in the first mounting through holes 11 from the inner periphery of the first support ring 1, then the PDC bearing outer ring assembly 1001 is positioned by using a positioning tool, and finally the first support ring 1 and the second extension end portion 204 are welded from the outer periphery of the first support ring 1.
The positioning tool is the PDC bearing welding positioning tool 5 (shown in fig. 4) provided by the present invention, and the PDC bearing welding positioning tool is explained below. The PDC bearing welding positioning tool is annular, the PDC bearing welding positioning tool 5 includes a first positioning portion 51, a second positioning portion 52, and a third positioning portion 53, which are sequentially arranged along an axial direction and are connected in a step shape, an outer diameter of the first outer circumferential positioning surface 501 is smaller than an outer diameter of the second outer circumferential positioning surface 502, and an outer diameter of the second outer circumferential positioning surface 502 is smaller than an outer diameter of an outer circumferential surface of the third positioning portion 53.
The outer peripheral surface of the first positioning portion 51 is a first outer peripheral positioning surface 501, the first outer peripheral positioning surface 501 is a complete circumferential surface, the outer peripheral surface of the second positioning portion 52 is a second outer peripheral positioning surface 502, the second outer peripheral positioning surface 502 is a complete circumferential surface, the third positioning portion 53 is formed with a first axial positioning surface 503, and the first axial positioning surface 503 faces the outer periphery of the second positioning portion 52. The first positioning portion 51 is provided with a first guiding inclined surface 591 at an axial end far from the second positioning portion 52, and the second positioning portion 52 is provided with a second guiding inclined surface 592 at an axial end far from the third positioning portion 53.
In the manufacturing method of the PDC bearing outer ring assembly 1001, when the PDC bearing outer ring assembly 1001 is positioned by using the PDC bearing welding and positioning tool 5, after a plurality of first polycrystalline diamond compact pieces 2 are inserted into the mounting holes in the inner periphery of the first support ring 1, the PDC bearing welding and positioning tool is placed in the inner periphery of the PDC bearing outer ring assembly 1001 and reaches an accurate position, the first outer peripheral positioning surface 501 is in contact fit with the first working surface 203 of the first polycrystalline diamond compact piece 2, the second outer peripheral positioning surface 502 is in contact fit with the inner peripheral surface 101 of the first support ring 1, and the first axial positioning surface 503 is used for being in contact fit with the axial end surface 103 of the first support ring 1, so that effective positioning of all the first polycrystalline diamond compact pieces 2 on the first support ring 1 and the first support ring 1 is realized.
Because the welding point between first polycrystalline diamond compact 2 and the first support ring 1 changes the periphery of first support ring 1 into, goes on in the periphery of first support ring 1 when welding, so can not influence each other between welding tool and the positioning tool, and can accomplish after a plurality of first polycrystalline diamond compact 2's welding once fixes a position, consequently effectively reduces the welding degree of difficulty, improves production efficiency.
Referring to fig. 6 and 7, fig. 6 is a schematic structural diagram of a second embodiment of the PDC bearing welding and positioning tool of the present invention, and fig. 7 is a schematic matching diagram of a second embodiment of the PDC bearing inner ring assembly of the present invention and the PDC bearing welding and positioning tool of the present invention. The method of manufacturing the PDC bearing also includes a method of manufacturing the PDC bearing inner ring assembly 1002, the method of manufacturing the PDC bearing inner ring assembly 1002 being similar to the method of manufacturing the PDC bearing outer ring assembly 1001 (shown in fig. 5). The method of manufacturing the PDC bearing inner ring assembly 1002 includes: firstly, mounting a second polycrystalline diamond compact 4 in the second mounting through hole 31; then, the second support ring 3 and all the second polycrystalline diamond compacts 4 on the second support ring 3 are positioned from the outer periphery of the second support ring 3 by using the PDC bearing welding positioning tool 6 (shown in fig. 6), and then the second support ring 3 and the fourth extended end portions 404 of the second polycrystalline diamond compacts 4 are welded from the inner periphery of the second support ring 3 by using the welding device.
The PDC bearing welding positioning tool 6 is annular, the PDC bearing welding positioning tool 6 includes a fourth positioning portion 61, a fifth positioning portion 62, and a sixth positioning portion 63 which are sequentially arranged along the axial direction and sequentially connected in a step shape, the inner diameter of the first inner peripheral positioning surface 601 is larger than the inner diameter of the second inner peripheral positioning surface 602, and the inner diameter of the second inner peripheral positioning surface 602 is larger than the inner diameter of the inner peripheral surface of the sixth positioning portion 63.
The inner peripheral surface of the fourth positioning portion 61 is a first inner peripheral positioning surface 601, the inner peripheral surface of the fifth positioning portion 62 is a second inner peripheral positioning surface 602, and the first inner peripheral positioning surface 601 and the second inner peripheral positioning surface 602 are complete circumferential surfaces; the sixth positioning portion 63 has a second axial positioning surface 603 formed thereon, the second axial positioning surface 603 facing the inner periphery of the fifth positioning portion 62. In the axial direction, a third guide inclined surface 691 is provided on an axial end of the fourth positioning portion 61, which is far from the fifth positioning portion 62, and a fourth guide inclined surface 692 is provided on an axial end of the fifth positioning portion 62, which is far from the sixth positioning portion 63.
In the manufacturing method of the PDC bearing inner ring assembly 1002, when the PDC bearing welding and positioning tool 6 is used to position the PDC bearing inner ring assembly 1002, after a plurality of second polycrystalline diamond compacts 4 are inserted into mounting holes on the outer periphery of the second support ring 3, the PDC bearing welding and positioning tool 6 is sleeved on the outer periphery of the PDC bearing inner ring assembly 1002 and reaches an accurate position, the first inner peripheral positioning surface 601 is in contact fit with the second working surface 403 of the second polycrystalline diamond compact 4, the second inner peripheral positioning surface 602 is in contact fit with the outer peripheral surface 302 of the second support ring 3, and the second axial positioning surface 603 is in contact fit with the axial end surface 203 of the second support ring 3, so that all the second polycrystalline diamond compacts 4 on the second support ring 3 and the second support ring 3 are effectively positioned.
Because the welding point between the second poly-crystal diamond composite sheet 4 and the second support ring 3 is changed into the periphery of the second support ring 3, the welding is carried out at the inner periphery of the second support ring 3 during welding, so that the welding tool and the positioning tool cannot be influenced mutually, and the welding of a plurality of second poly-crystal diamond composite sheets 4 can be completed after one-time positioning, thereby effectively reducing the welding difficulty, improving the production efficiency and improving the product quality.
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 (7)
- The PDC bearing outer ring assembly comprises a first support ring and a plurality of first polycrystalline diamond compacts fixed on the first support ring, wherein each first polycrystalline diamond compact comprises a first hard alloy matrix layer and a first polycrystalline diamond layer;the method is characterized in that:the first support ring is provided with a plurality of first mounting through holes which penetrate through the first support ring along the radial direction of the first support ring, the first mounting through holes are provided with a first hole section and a second hole section which are sequentially communicated in the penetrating direction of the first mounting through holes, the first inner diameter of the first hole section is larger than the second inner diameter of the second hole section, and the first hole section is close to the axis of the first support ring relative to the second hole section;in the axial direction of the first polycrystalline diamond compact, the first hard alloy substrate layer comprises a first extension section and a second extension section which are connected in sequence, the outer diameter of the first extension section is larger than that of the second extension section, the first extension section is provided with a first extension end part far away from the second extension section, the second extension section is provided with a second extension end part far away from the first extension section, the first polycrystalline diamond layer is positioned on the first extension end part, and a first working surface facing away from the first extension section is arranged on the first polycrystalline diamond layer;the first extension section is inserted into the first hole section, the second extension section is inserted into the second hole section, the first working surface protrudes from the inner periphery of the first support ring, and the second extension end is welded with the first support ring.
- 2. The PDC bearing outer ring assembly of claim 1, wherein:the first supporting ring forms a first step surface between the first hole section and the second hole section, the first hard alloy base body layer forms a second step surface between the first extending section and the second extending section, and the first step surface and the second step surface are mutually abutted in the radial direction of the first supporting ring.
- 3. The PDC bearing outer ring assembly of claim 1 or 2, wherein:the first working surface is an inward concave arc surface, and the first working surfaces on the first polycrystalline diamond compacts are located on the same circumferential surface.
- The PDC bearing inner ring assembly comprises a second support ring and a plurality of second polycrystalline diamond compacts fixed on the second support ring, wherein the second polycrystalline diamond compacts comprise a second hard alloy matrix layer and a second polycrystalline diamond layer;the method is characterized in that:the second support ring is provided with a plurality of second mounting through holes which penetrate through the second support ring along the radial direction of the second support ring, in the penetrating direction of the second mounting through holes, the second mounting through holes are provided with a third hole section and a fourth hole section which are sequentially communicated, the third inner diameter of the third hole section is larger than the fourth inner diameter of the fourth hole section, and the third hole section is far away from the axis of the second support ring relative to the fourth hole section;in the axial direction of the second polycrystalline diamond compact, the second hard alloy base layer comprises a third extension section and a fourth extension section which are connected in sequence, the outer diameter of the third extension section is larger than that of the fourth extension section, the third extension section is provided with a third extension end far away from the fourth extension section, the fourth extension section is provided with a fourth extension end far away from the third extension section, the second polycrystalline diamond layer is positioned on the third extension end, and a second working surface facing away from the third extension section is arranged on the second polycrystalline diamond layer;the third extending section is inserted into the third hole section, the fourth extending section is inserted into the fourth hole section, the second working surface is protruded out of the periphery of the second support ring, and the fourth extending end is welded with the second support ring.
- 5. The PDC bearing inner ring assembly of claim 4, wherein:the second support ring forms a third step surface between the third hole section and the fourth hole section, the second cemented carbide base layer forms a fourth step surface between the third extending section and the fourth extending section, and the third step surface and the fourth step surface are mutually abutted in the radial direction of the second support ring.
- 6. The PDC bearing inner ring assembly of claim 4 or 5, wherein:the second working surface is an outer convex cambered surface, and the plurality of second working surfaces on the second polycrystalline diamond compact are positioned on the same circumferential surface.
- The PDC bearing comprises a PDC bearing outer ring assembly and a PDC bearing inner ring assembly, and the PDC bearing inner ring assembly is positioned on the inner periphery of the PDC bearing outer ring assembly;the method is characterized in that:the PDC bearing outer ring assembly is the PDC bearing outer ring assembly of any one of the preceding claims 1 to 3;the PDC bearing inner ring assembly is the PDC bearing inner ring assembly of any one of the preceding claims 4 to 6;the first working surface cooperates with the second working surface.
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| CN202021554827.4U CN212360505U (en) | 2020-07-30 | 2020-07-30 | PDC bearing outer ring assembly, PDC bearing inner ring assembly and PDC bearing |
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| CN202021554827.4U CN212360505U (en) | 2020-07-30 | 2020-07-30 | PDC bearing outer ring assembly, PDC bearing inner ring assembly and PDC bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894984A (en) * | 2020-07-30 | 2020-11-06 | 广东钜鑫新材料科技股份有限公司 | PDC bearing outer ring assembly and manufacturing method thereof, PDC bearing inner ring assembly and manufacturing method thereof and PDC bearing |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111894984A (en) * | 2020-07-30 | 2020-11-06 | 广东钜鑫新材料科技股份有限公司 | PDC bearing outer ring assembly and manufacturing method thereof, PDC bearing inner ring assembly and manufacturing method thereof and PDC bearing |
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