Anti-cracking wear-resistant radial TC bearing and preparation method thereof

Abstract

The invention relates to the technical field of bearings, in particular to an anti-cracking wear-resistant radial TC bearing which comprises a bearing static ring rotationally arranged outside a bearing moving ring in a sleeving mode, a moving ring buffer layer is arranged on the outer wall of the bearing moving ring in a surrounding mode, and a moving ring wear-resistant alloy layer is arranged on the outer wall of the moving ring buffer layer in a surrounding mode. The moving ring wear-resistant alloy layer comprises a plurality of wear-resistant alloy blocks which are arranged at intervals; a static ring buffer layer is arranged on the inner wall of the bearing static ring in a surrounding mode, a static ring abrasion-resistant alloy layer is arranged on the inner wall of the static ring buffer layer in a surrounding mode, and the static ring abrasion-resistant alloy layer comprises a plurality of abrasion-resistant alloy blocks arranged at intervals. The movable ring buffer layer is additionally arranged on the outer wall of the bearing movable ring, the static ring buffer layer is additionally arranged on the inner wall of the bearing static ring, and when the bearing base body is stressed and deformed in use, the deformation is eliminated by the movable ring buffer layer and the static ring buffer layer, so that the wear-resistant alloy block is not influenced by the deformation of the base body, the cracking and falling phenomena of the alloy block are avoided, and the service life of the wear-resistant alloy block is prolonged. And the service life of the product is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to a crack-proof and wear-resistant radial TC bearing and a preparation method thereof. Background Art

[0002] At present, screw drill tools have become the most widely used downhole power tools and have been widely used in oil drilling and well repair. Radial TC bearings are used at the upper and lower ends of the screw drill tool transmission shaft assembly. There are two sets of radial TC bearings, one set of upper radial TC bearings at the upper end and one set of lower radial TC bearings at the lower end. The following radial TC bearing is used as an example. The lower radial TC bearing includes a bearing static ring and a bearing dynamic ring. The bearing dynamic ring is fixed at the lower end of the transmission shaft in the transmission shaft assembly and rotates with the transmission shaft and the connected drill bit. The bearing static ring of the lower radial TC bearing is fixed at the lower end of the transmission shaft housing in the transmission shaft assembly. During directional drilling, the transmission shaft housing and the bearing static ring of the lower radial TC bearing do not rotate. During operation, the screw drill tool motor drives the universal shaft, transmission shaft, bearing dynamic ring of the lower radial TC bearing, drill bit and other components to rotate together. At the same time, the drill bit is affected by the drilling pressure, and the drill bit will drill through the rock at high speed. During drilling, the drill bit will be subjected to the rebound force of broken rocks and the irregularity of rock formations. The drill bit, drive shaft, and the moving ring of the lower radial TC bearing will produce chaotic movements at different angles. This force is controlled by the stationary ring of the radial TC bearing fixed on the lower drive shaft housing. Therefore, the moving ring of the lower radial TC bearing and the stationary ring of the lower radial TC bearing are not only subject to the friction of high-speed operation, but also to the radial force controlling the drilling direction, and also to the high-temperature friction and straightening pressure generated by the friction surface. The two friction surfaces of the moving ring of the lower radial TC bearing and the stationary ring of the lower radial TC bearing are affected by different forces, and the bodies of the two lower radial TC bearings will deform in different directions. The body is made of 42CrMo alloy steel, and high-hardness wear-resistant alloy blocks are welded on the two wear-resistant surfaces. The mechanical properties of 42CrMo alloy steel and high-hardness alloy blocks, especially plasticity, elongation and shrinkage, are very different. Therefore, when the body is subjected to deformation, the alloy block is prone to cracks (regular cracks). Once the alloy block on the wear-resistant surface cracks and falls off, it is easy to cause TC sudden death screw damage or TC wear acceleration, which seriously affects the service life of the drilling tool. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a crack-resistant and wear-resistant radial TC bearing which can effectively resist the deformation of the bearing moving ring and the bearing stationary ring, and in which the wear-resistant alloy block is firmly combined with the bearing moving ring or the bearing stationary ring, and a preparation method thereof.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a crack-proof and wear-resistant radial TC bearing, including a bearing stationary ring rotatably mounted on the outside of the bearing moving ring, characterized in that: a moving ring buffer layer is arranged around the outer wall of the bearing moving ring, and a moving ring wear-resistant alloy layer is arranged around the outer wall of the moving ring buffer layer, and the moving ring wear-resistant alloy layer includes a plurality of wear-resistant alloy blocks arranged at intervals; a stationary ring buffer layer is arranged around the inner wall of the bearing stationary ring, and a stationary ring wear-resistant alloy layer is arranged around the inner wall of the stationary ring buffer layer, and the stationary ring wear-resistant alloy layer includes a plurality of wear-resistant alloy blocks arranged at intervals.

[0005] As a preferred technical solution, the dynamic coil buffer layer and the static coil buffer layer are both connection bases formed by sintering a mixture of tungsten carbide powder and solder.

[0006] As a preferred technical solution, the wear-resistant alloy blocks in the stationary ring wear-resistant alloy layer and the dynamic ring wear-resistant alloy layer are also fixed to each other through the connecting matrix.

[0007] As a preferred technical solution, the thickness of the dynamic coil buffer layer and the static coil buffer layer is 0.5 to 1.5 times the thickness of the wear-resistant alloy block.

[0008] As a preferred technical solution, the wear-resistant alloy blocks are rectangular, have equal length and width, are evenly spaced along the axis of the TC bearing, and two adjacent rows are staggered.

[0009] As a preferred technical solution, the wear-resistant alloy block is a tungsten-cobalt alloy block.

[0010] Also provided is a method for preparing the anti-cracking and wear-resistant radial TC bearing, comprising the following steps: The production of the bearing moving ring comprises the following steps: firstly, the moving ring bushing is produced, a section of seamless steel pipe is cut, and the wear-resistant alloy blocks arranged at regular intervals are pasted on the inner circumference of the seamless steel pipe; the moving ring bushing with the wear-resistant alloy blocks pasted thereon is sleeved on the outside of the original bearing moving ring, one end is closed and aligned, and the other end is open, the outer diameter of the original bearing moving ring is smaller than the inner diameter of the moving ring bushing with the wear-resistant alloy blocks pasted thereon, so that a filling layer gap of a certain thickness is left between the two, tungsten carbide powder and a solder mixture are filled from the open end into the filling layer gap and the filling block gap between the wear-resistant alloy blocks, and then the moving ring bushing and the original bearing moving ring that are sleeved together are put into a sintering furnace to be sintered into one, and then the moving ring bushing is ground off from the outside of the original bearing moving ring by processing to expose the wear-resistant alloy blocks, and then the excess length of the ends is cut off together, and the processing of the bearing moving ring is completed; The production of the bearing stationary ring comprises the following steps: firstly producing a stationary ring bushing, cutting a section of seamless steel pipe, and pasting the wear-resistant alloy blocks arranged at regular intervals on the outer circumferential surface of the seamless steel pipe; putting the stationary ring bushing with the wear-resistant alloy blocks pasted thereon inside the original bearing stationary ring, with one end being closed and aligned, and the other end being open; the inner diameter of the original bearing stationary ring is larger than the outer diameter of the stationary ring bushing with the wear-resistant alloy blocks pasted thereon, so that a filling layer gap of a certain thickness is left between the two; a mixture of tungsten carbide powder and solder is filled from the open end into the filling layer gap and the filling block gap between the wear-resistant alloy blocks; then the stationary ring bushing and the original bearing stationary ring that are put together are put into a sintering furnace and sintered into one; then the stationary ring bushing is ground off from the inside of the original bearing stationary ring through processing to expose the wear-resistant alloy blocks; then the excess length of the ends is cut off together, and the processing of the bearing stationary ring is completed.

[0011] As a preferred technical solution, a stepped moving ring limit retaining ring is provided on the outer wall of the moving ring of the original bearing, and a stepped moving ring limit retaining ring is also provided on the end of the corresponding moving ring bushing for use therewith. When the moving ring limit retaining ring abuts against the moving ring limit retaining ring, the two are closed and aligned at one end; a stepped stationary ring limit retaining ring is provided on the inner wall of the stationary ring of the original bearing, and a stepped stationary ring limit retaining ring is also provided on the end of the corresponding stationary ring bushing for use therewith. When the stationary ring limit retaining ring abuts against the stationary ring limit retaining ring, the two are closed and aligned at one end.

[0012] Due to the adoption of the above technical scheme, the crack-proof and wear-resistant radial TC bearing comprises a bearing stationary ring rotatably sleeved on the outside of the bearing moving ring, a moving ring buffer layer is arranged around the outer wall of the bearing moving ring, a moving ring wear-resistant alloy layer is arranged around the outer wall of the moving ring buffer layer, and the moving ring wear-resistant alloy layer comprises a plurality of wear-resistant alloy blocks arranged at intervals; a stationary ring buffer layer is arranged around the inner wall of the bearing stationary ring, a stationary ring wear-resistant alloy layer is arranged around the inner wall of the stationary ring buffer layer, and the stationary ring wear-resistant alloy layer comprises a plurality of wear-resistant alloy blocks arranged at intervals; the beneficial effects of the present invention are: while the moving ring wear-resistant alloy layer is sintered on the outer wall of the bearing moving ring, the moving ring and the The moving circle buffer layer is sintered between the moving circle wear-resistant alloy layers. Similarly, the static circle wear-resistant alloy layer is sintered on the inner wall of the bearing static ring and the static circle wear-resistant alloy layer is sintered between the bearing static ring and the static ring. The moving circle buffer layer and the static circle buffer layer are both made of wear-resistant tungsten carbide powder and solder mixed and sintered at high temperature, and then finely processed to form the lower radial TC bearing static ring and the bearing moving ring. When the bearing matrix is ​​deformed by force during use, there is a layer of granular cushion between the matrix and the wear-resistant alloy block to eliminate the deformation, so the wear-resistant alloy block will not be affected by the deformation of the matrix, and the alloy block will not crack or fall off, which greatly improves the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention. Figure 1 is a cross-sectional view of the anti-crack and wear-resistant radial TC bearing of the present invention; Figure 2 yes Figure 1 A partial enlarged view of point I in the middle; Figure 3 It is a schematic diagram of the manufacturing process of the bearing moving ring of the anti-crack and wear-resistant radial TC bearing of the present invention; Figure 4 yes Figure 3 A partial enlarged view of the middle II; Figure 5 yes Figure 3 A partial enlarged view of the middle part III; Figure 6 It is a schematic diagram of the manufacturing process of the bearing stationary ring of the anti-crack and wear-resistant radial TC bearing of the present invention; Figure 7 yes Figure 6 A partial enlarged view of the middle IV; Figure 8 yes Figure 6 A partial enlarged view of point V in the middle; Fig. 9 This is an installation effect diagram of the anti-crack and wear-resistant radial TC bearing of the present invention; Fig.10 It is a schematic diagram of the arrangement of the wear-resistant alloy blocks of the crack-proof and wear-resistant radial TC bearing of the present invention.

[0014] In the figure: 1-bearing moving ring; 11-moving ring buffer layer; 12-moving ring wear-resistant alloy layer; 13-moving ring bushing; 14-original bearing moving ring; 15-moving ring limit retaining ring; 16-moving ring limit abutting ring; 2-bearing stationary ring; 21-stationary ring buffer layer; 22-stationary ring wear-resistant alloy layer; 23-stationary ring bushing; 24-original bearing stationary ring; 25-stationary ring limit retaining ring; 26-stationary ring limit abutting ring; 3-wear-resistant alloy block; 4-filling layer gap; 5-transmission shaft; 6-transmission shaft housing; 7-filling block gap. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0016] like Figure 1 and Figure 2As shown in common, the anti-cracking and wear-resistant radial TC bearing comprises a bearing stationary ring 2 which is rotatably mounted on the outside of the bearing moving ring 1. A moving ring buffer layer 11 is arranged around the outer wall of the bearing moving ring 1, and a moving ring wear-resistant alloy layer 12 is arranged around the outer wall of the moving ring buffer layer 11. The moving ring wear-resistant alloy layer 12 comprises a plurality of wear-resistant alloy blocks 3 arranged at intervals; a stationary ring buffer layer 21 is arranged around the inner wall of the bearing stationary ring 2, and a stationary ring wear-resistant alloy layer 22 is arranged around the inner wall of the stationary ring buffer layer 21, and the stationary ring wear-resistant alloy layer 22 comprises a plurality of wear-resistant alloy blocks 3 arranged at intervals; in this embodiment, the lower radial TC bearing is taken as an example, and is used at the lower end of the screw drill transmission shaft 5 assembly. The preparation method and structure of the upper radial TC bearing are the same as those of the lower radial TC bearing, and will not be repeated. The bearing moving ring 1 is fixed at the lower end of the transmission shaft 5 in the transmission shaft 5 assembly, and rotates with the transmission shaft 5 and the connecting drill bit. The bearing static ring 2 is fixed at the lower end of the transmission shaft housing 6 in the transmission shaft 5 assembly. During directional drilling, the transmission shaft housing 6 and the bearing static ring 2 do not rotate. While the dynamic ring wear-resistant alloy layer 12 is sintered on the outer wall of the bearing dynamic ring 1, the upper dynamic ring buffer layer 11 is sintered between the bearing dynamic ring 1 and the dynamic ring wear-resistant alloy layer 12. Similarly, while the static ring wear-resistant alloy layer 22 is sintered on the inner wall of the bearing static ring 2, the upper static ring buffer layer 21 is sintered between the bearing static ring 2 and the static ring wear-resistant alloy layer 22. The dynamic ring buffer layer 11 and the static ring buffer layer 21 are both made of wear-resistant tungsten carbide powder and solder mixed and sintered at high temperature, and then finely processed to form the lower radial TC bearing static ring 2 and the bearing dynamic ring 1. When the bearing base is deformed under force during use, there is a layer of particle cushion between the base and the wear-resistant alloy block 3 to eliminate the deformation, so the wear-resistant alloy block 3 will not be affected by the deformation of the base, and the alloy block will not crack or fall off, which greatly improves the service life of the product.

[0017] The dynamic coil buffer layer 11 and the static coil buffer layer 21 are both connection bases formed by sintering a mixture of tungsten carbide powder and solder. Tungsten carbide powder (WC) is the main raw material for producing cemented carbide. Tungsten carbide powder is a black hexagonal crystal with a metallic luster and a hardness similar to that of diamond. The chemical properties of tungsten carbide are stable. The solder is a solder with a special ratio of copper, nickel and zinc; the tungsten carbide powder and solder are mixed and used as a filler, and solidified after sintering to form a connection base.

[0018] The wear-resistant alloy blocks 3 in the stationary ring wear-resistant alloy layer 22 and the dynamic ring wear-resistant alloy layer 12 are also fixed to each other through the connecting matrix. Since the wear-resistant alloy blocks 3 are arranged at intervals from each other, there are filling block gaps 7 between them, and the filling block gaps 7 and the filling layer gaps 4 are filled with fillers. They are solidified together during sintering.

[0019] The thickness of the dynamic coil buffer layer 11 and the static coil buffer layer 21 is 0.5 to 1.5 times the thickness of the wear-resistant alloy block 3. Preferably, the thickness of the dynamic coil buffer layer 11 and the static coil buffer layer 21 is the same as the thickness of the wear-resistant alloy block 3. At this time, the filling material just plays a buffering role and does not affect the adhesion strength.

[0020] like Fig.10 As shown, the wear-resistant alloy block 3 is rectangular, the length and width of the wear-resistant alloy block 3 are equal, the wear-resistant alloy block 3 is evenly spaced along the axial direction of the TC bearing, and two adjacent rows are staggered. The wear-resistant alloy block 3 is preferably rectangular, but other shapes are also possible. The consistent shape of the wear-resistant alloy block 3 is convenient for processing, and the staggered arrangement can enhance the stability of the work.

[0021] The wear-resistant alloy block 3 is a tungsten-cobalt alloy block. It can also be a tungsten-titanium alloy. It only needs to be hard enough.

[0022] The present invention also provides a method for preparing the anti-cracking and wear-resistant radial TC bearing, comprising the following steps: The production of the bearing moving ring 1 includes first producing a moving ring bushing 13, cutting a section of seamless steel pipe, and pasting wear-resistant alloy blocks 3 arranged at regular intervals on the inner circumference of the seamless steel pipe; sleeve the moving ring bushing 13 pasted with the wear-resistant alloy blocks 3 on the outside of the original bearing moving ring 14, with one end closed and aligned, and the other end open, the outer diameter of the original bearing moving ring 14 is smaller than the inner diameter of the moving ring bushing 13 pasted with the wear-resistant alloy block 3, so that a certain thickness of the filling layer gap 4 is left between the two, and the filling layer gap 4 is 0.5 to 1.5 times the thickness of the wear-resistant alloy block 3, and tungsten carbide powder and solder mixture are filled from the open end into the filling layer gap 4 and the filling block gap 7 between the wear-resistant alloy blocks 3, and then the moving ring bushing 13 and the original bearing moving ring 14 that are sleeved together are put into a sintering furnace to sinter into one, and then the moving ring bushing 13 is ground off from the outside of the original bearing moving ring 14 through processing to expose the wear-resistant alloy block 3, and then the excess length of the end is cut off together, and the bearing moving ring 1 is processed; The production of the bearing stationary ring 2 is as follows: first, a stationary ring bushing 23 is produced, a section of seamless steel pipe is cut, and wear-resistant alloy blocks 3 arranged at regular intervals are pasted on the outer circumference of the seamless steel pipe; the stationary ring bushing 23 with the wear-resistant alloy blocks 3 pasted is sleeved inside the original bearing stationary ring 24, one end is closed and aligned, and the other end is open, the inner diameter of the original bearing stationary ring 24 is larger than the outer diameter of the stationary ring bushing 23 with the wear-resistant alloy block 3 pasted, so a filling layer gap 4 of a certain thickness is left between the two, and the filling layer gap 4 is 0.5 to 1.5 times the thickness of the wear-resistant alloy block 3, and a mixture of tungsten carbide powder and solder is filled from the open end into the filling layer gap 4 and the filling block gap 7 between the wear-resistant alloy blocks 3, and then the stationary ring bushing 23 and the original bearing stationary ring 24 that are sleeved together are put into a sintering furnace to sinter into one, and then the stationary ring bushing 23 is ground off from the inside of the original bearing stationary ring 24 through processing to expose the wear-resistant alloy block 3, and then the excess length of the end is cut off together, and the bearing stationary ring 2 is processed.

[0023] The outer wall of the original bearing moving ring 14 is provided with a stepped moving ring limit retaining ring 15, and the end of the corresponding moving ring bushing 13 is also provided with a stepped moving ring limit retaining ring 16 used in conjunction with it. When the moving ring limit retaining ring 16 abuts against the moving ring limit retaining ring 15, the two are closed and aligned at one end, and at this time, a mixture of tungsten carbide powder and solder is filled in from the open end, and then sintered at high temperature. The inner wall of the original bearing stationary ring 24 is provided with a stepped stationary ring limit retaining ring 25, and the end of the corresponding stationary ring bushing 23 is also provided with a stepped stationary ring limit retaining ring 26 used in conjunction with it. When the stationary ring limit retaining ring 26 abuts against the stationary ring limit retaining ring 25, the two are closed and aligned at one end, and at this time, a mixture of tungsten carbide powder and solder is filled in from the open end, and then sintered at high temperature.

[0024] After the bearing moving ring 1 and the bearing stationary ring 2 are sintered, they are processed, and the excess parts are ground and cut off to form Figure 1 The finished product, sintering temperature and specific cutting dimensions shown are all prior art and will not be described in detail.

[0025] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A crack-proof and wear-resistant radial TC bearing, comprising a bearing stationary ring (2) rotatably mounted outside a bearing moving ring (1), characterized in that: A dynamic ring buffer layer (11) is disposed on the outer wall of the bearing dynamic ring (1), a dynamic ring wear-resistant alloy layer (12) is disposed on the outer wall of the dynamic ring buffer layer (11), and the dynamic ring wear-resistant alloy layer (12) includes a plurality of wear-resistant alloy blocks (3) arranged at intervals; a static ring buffer layer (21) is disposed on the inner wall of the bearing static ring (2), a static ring wear-resistant alloy layer (22) is disposed on the inner wall of the static ring buffer layer (21), and the static ring wear-resistant alloy layer (22) includes a plurality of wear-resistant alloy blocks (3) arranged at intervals.

2. The anti-crack and wear-resistant radial TC bearing according to claim 1, characterized in that: The dynamic coil buffer layer (11) and the static coil buffer layer (21) are both connection bases formed by mixing and sintering tungsten carbide powder and solder.

3. The anti-crack and wear-resistant radial TC bearing according to claim 2, characterized in that: The wear-resistant alloy blocks (3) in the stationary ring wear-resistant alloy layer (22) and the movable ring wear-resistant alloy layer (12) are also fixed to each other via the connection matrix.

4. The anti-crack and wear-resistant radial TC bearing according to claim 1, characterized in that: The thickness of the dynamic coil buffer layer (11) and the static coil buffer layer (21) is 0.5 to 1.5 times the thickness of the wear-resistant alloy block (3).

5. The anti-crack and wear-resistant radial TC bearing according to claim 1, characterized in that: The wear-resistant alloy blocks (3) are rectangular, the length and width of the wear-resistant alloy blocks (3) are equal, the wear-resistant alloy blocks (3) are evenly spaced along the axial direction of the TC bearing, and two adjacent rows are staggered.

6. The anti-crack and wear-resistant radial TC bearing according to claim 1, characterized in that: The wear-resistant alloy block (3) is a tungsten-cobalt alloy block.

7. The method for preparing the crack-resistant and wear-resistant radial TC bearing according to any one of claims 1 to 6, characterized in that: The following steps are included: The bearing moving ring (1) is manufactured by first manufacturing a moving ring bushing (13), cutting a section of seamless steel pipe, and pasting the wear-resistant alloy blocks (3) arranged at regular intervals on the inner circumference of the seamless steel pipe; the moving ring bushing (13) pasted with the wear-resistant alloy blocks (3) is sleeved on the outside of the original bearing moving ring (14), with one end closed and aligned and the other end open, the outer diameter of the original bearing moving ring (14) is smaller than the inner diameter of the moving ring bushing (13) pasted with the wear-resistant alloy blocks (3), so that a filling layer of a certain thickness is left between the two. The gap (4) is filled with a mixture of tungsten carbide powder and solder from the open end into the gap (4) of the filling layer and the gap (7) of the filling blocks between the wear-resistant alloy blocks (3), and then the movable ring bushing (13) and the original bearing movable ring (14) are put into a sintering furnace and sintered into one piece, and then the movable ring bushing (13) is ground off from the outside of the original bearing movable ring (14) through processing to expose the wear-resistant alloy block (3), and then the excess length of the end is cut off together, and the processing of the bearing movable ring (1) is completed; The manufacturing of the bearing stationary ring (2) comprises first manufacturing a stationary ring bushing (23), cutting a section of seamless steel pipe, and pasting the wear-resistant alloy blocks (3) arranged at regular intervals on the outer circumference of the seamless steel pipe; the stationary ring bushing (23) pasted with the wear-resistant alloy blocks (3) is sleeved inside the original bearing stationary ring (24), one end is closed and aligned, and the other end is open, the inner diameter of the original bearing stationary ring (24) is larger than the outer diameter of the stationary ring bushing (23) pasted with the wear-resistant alloy blocks (3), so that a filling layer of a certain thickness is left between the two. The gap (4) is filled with a mixture of tungsten carbide powder and solder from the open end into the filling layer gap (4) and the filling block gap (7) between the wear-resistant alloy blocks (3), and then the static ring bushing (23) and the original bearing static ring (24) that are put together are placed in a sintering furnace and sintered into one piece, and then the static ring bushing (23) is ground off from the inside of the original bearing static ring (24) through processing to expose the wear-resistant alloy block (3), and then the excess length of the end is cut off together, and the processing of the bearing static ring (2) is completed.

8. The method for preparing the crack-resistant and wear-resistant radial TC bearing according to claim 7, characterized in that: A stepped moving coil limit retaining ring (15) is provided on the outer wall of the original bearing moving coil (14), and a stepped moving coil limit abutting ring (16) is provided at the end of the corresponding moving coil bushing (13) for use therewith. When the moving coil limit abutting ring (16) abuts against the moving coil limit retaining ring (15), the two are closed and aligned at one end. A stepped stationary ring limit retaining ring (25) is provided on the inner wall of the original bearing stationary ring (24), and a stepped stationary ring limit abutting ring (26) is also provided at the end of the corresponding stationary ring bushing (23) for use therewith. When the stationary ring limit abutting ring (26) abuts against the stationary ring limit retaining ring (25), the two are closed and aligned at one end.

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