CN216298228U - Manufacturing die for radial sliding bearing static ring - Google Patents

Abstract

The utility model discloses a manufacturing die for a radial sliding bearing static ring, which relates to the technical field of metal processing and manufacturing of downhole tools for drilling, and comprises the following steps: the radius of a first outer cylindrical surface of the pipe body is equal to the first radius, the radius of a second outer cylindrical surface of the pipe body is equal to the second radius, an annular convex part is arranged on the first outer cylindrical surface of the pipe body, and the radius of the outer cylindrical surface of the convex part is equal to the third radius; the lower end part of the second outer cylindrical surface of the pipe body is provided with an annular shoulder; the pipe physical stamina stretches into quiet ring body centre bore, and the annular circular bead can support quiet ring body fourth terminal surface, and annular bellying can support the antifriction piece in the quiet ring body mounting hole. The precision of friction-resistant spare installation to the quiet ring body can be improved to this application, makes the brazing between friction-resistant spare and the quiet ring body become easier.

Description

Dies for making radial plain bearing static rings

technical field

The utility model relates to the technical field of metal processing and manufacturing of downhole tools for drilling, in particular to a manufacturing die for a radial sliding bearing static ring.

Background technique

Oil and gas drilling downhole tools, especially turbo drilling tools, rotary steering, vertical drilling systems and other downhole equipment, the radial sliding bearings usually use drilling fluid as a cooling and lubricating medium, due to the high ambient temperature and pressure, the tiny cuttings in the drilling fluid After particles (such as quartz sand, etc.) enter the bearing, it is easy to cause rapid wear of the bearing and lead to premature failure. Because the bearing is an important part in the downhole tool, and it is also a vulnerable part, one of the main tasks of the maintenance work of the downhole tool is to replace the bearing. For example, the Chinese patent with the application number CN202020509786.0 provides a PDC radial centralizing sliding bearing, and a plurality of PDC composite sheets are arranged on the inner cylindrical surface of the integral static ring base, and the PDC composite sheets are assembled in the integral static ring base. in the cylindrical blind hole. We know that it is very difficult to drill or mill high-precision blind holes on the inner cylindrical surface of the static ring, especially when the diameter of the inner cylindrical surface of the static ring is small to a certain size (for example, the diameter is less than 50mm), the diameter of the inner cylindrical surface is processed. The difficulty and cost of blind holes with extremely high tolerances and depth tolerances are very high, which are unbearable for ordinary enterprises.

Utility model content

The inventor in this application has developed a radial sliding bearing static ring to replace the existing PDC radial sliding bearing static ring. The radial sliding bearing static ring developed by the inventor needs to fix the friction-resistant parts by brazing In the installation hole of the static ring body, but without other auxiliary tools or molds, the friction-resistant member is not easy to be installed into the installation hole of the static ring body with high precision and fixed with the static ring body by welding.

In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiment of the present invention is to provide a manufacturing mold for a radial sliding bearing static ring, which is used for manufacturing a radial sliding bearing static ring, and can improve the resistance to The precision with which the friction element is mounted to the stationary ring body makes brazing of the friction element to the stationary ring body easier.

The specific technical scheme of the embodiment of the present utility model is:

A manufacturing die for a radial sliding bearing static ring, the radial sliding bearing static ring comprises: a tubular static ring body, the first inner cylindrical surface radius of the static ring body is a first radius, and the static ring body The radius of the second inner cylindrical surface is the second radius, and a plurality of installation holes vertically penetrating the side wall of the stationary ring body are opened on the second inner cylindrical surface of the stationary ring body. Evenly distributed in the circumferential direction; friction-resistant parts arranged in the installation holes and matched with the installation holes; the friction-resistant parts and the static ring body are connected together by brazing through welding joints; the friction-resistant parts The first end surface is higher than the second inner cylindrical surface of the static ring body, and the distance from the first end surface of the friction-resistant member to the axis line of the static ring body is a third radius, and the second radius is greater than the third radius. Three radii, the third radius is greater than the first radius;

The manufacturing mold for radial sliding bearing static ring includes:

The tube body, the radius of the first outer cylindrical surface of the tube body is equal to the first radius, the radius of the second outer cylindrical surface of the tube body is equal to the second radius, and the first outer cylindrical surface of the tube body has an annular convex surface The radius of the outer cylindrical surface of the raised portion is equal to the third radius, and the end of the second outer cylindrical surface of the pipe body has an annular shoulder; the pipe body can extend into the central hole of the static ring body, so The shoulder can abut against the fourth end face of the static ring body, and the protruding portion can abut against the friction-resistant member in the installation hole of the static ring body.

Preferably, the end of the first outer cylindrical surface of the pipe body has an external thread; the manufacturing mold for the radial sliding bearing static ring further comprises: a locking nut, the inner thread of which is connected to the first outer cylindrical surface of the pipe body. The external thread at the end of the upper surface is screwed and connected, and can abut against the third end surface of the static ring body.

Preferably, when the shoulder of the tube body abuts against the fourth end face of the stationary ring body, the position of the protruding portion corresponds to the anti-friction member in the mounting hole of the stationary ring body.

Preferably, there is transition fit between the first outer cylindrical surface of the pipe body and the first inner cylindrical surface of the static ring body.

Preferably, there is transition fit between the second outer cylindrical surface of the pipe body and the second inner cylindrical surface of the static ring body.

Preferably, the mounting hole is a cylindrical hole, the friction-resistant member is a cylinder, the diameter D of the mounting hole is larger than the diameter d of the friction-resistant member, and D-d=0.1mm˜0.3mm.

Preferably, the friction-resistant member and the static ring body are welded together by brazing material and flux by flame brazing or induction brazing.

Preferably, the solder is silver-based brazing solder.

Preferably, there is an annular gap between the first outer cylindrical surface of the pipe body and the second inner cylindrical surface of the static ring body.

Preferably, the distance from the position where the shoulder of the pipe body presses against the fourth end surface of the stationary ring body to the lower end of the external thread on the upper end of the first outer cylindrical surface of the pipe body is less than or equal to the axial length of the stationary ring body.

The technical scheme of the present utility model has the following significant beneficial effects:

Using the manufacturing mold for the radial sliding bearing static ring in the present application can realize the manufacturing and processing of the radial sliding bearing static ring, which can effectively reduce the processing difficulty and manufacturing cost. Since the radius of the first outer cylindrical surface of the tube body is equal to the first radius, and the radius of the second outer cylindrical surface of the tube body is equal to the second radius, the static ring body can be sleeved on the outside of the tube body, and when the two are assembled together, the The coaxiality between the first outer cylindrical surface, the second outer cylindrical surface of the pipe body, the first inner cylindrical surface of the static ring body and the second inner cylindrical surface of the static ring body is completely guaranteed; when the friction-resistant part is installed in the installation hole , and when the first end surface of the anti-friction part abuts against the outer cylindrical surface of the convex part, the distance (third radius) from the first end surface of the anti-friction part to the axis line of the static ring body is equal to the radius of the outer cylindrical surface of the convex part , the coaxiality between the first end surface (part of the cylindrical surface) of the friction-resistant part and the second inner cylindrical surface of the static ring body is also fully guaranteed, which reduces the amount of reshaping and processing of the friction-resistant parts in the later period and greatly reduces the processing cost. , which is more conducive to the popularization and application of the radial sliding bearing static ring in this application, and better meets the use requirements of drilling downhole tools.

With reference to the following description and drawings, specific embodiments of the invention are disclosed in detail, indicating the manner in which the principles of the invention may be employed. It should be understood that embodiments of the present invention are not thereby limited in scope. Features described and/or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or instead of features in other embodiments .

Description of drawings

The drawings described herein are for explanatory purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportions of the components in the figures are only schematic and are used to help the understanding of the present invention, and do not specifically limit the shapes and proportions of the components of the present invention. Under the teaching of the present invention, those skilled in the art can select various possible shapes and proportions according to specific conditions to implement the present invention.

Fig. 1 is the sectional view of the radial sliding bearing static ring in the utility model under the first embodiment;

Fig. 2A is a schematic cross-sectional view without weld when the manufacturing die used for the radial sliding bearing static ring in the utility model and the radial sliding bearing static ring in Fig. 1 are assembled together;

FIG. 2B is a schematic cross-sectional view of a welding joint when the manufacturing die for the radial sliding bearing static ring in the utility model is assembled with the radial sliding bearing static ring in FIG. 1;

2C is a cross-sectional view of the radial plain bearing static ring in FIG. 2B;

FIG. 2D is a schematic longitudinal cross-sectional view of the static ring body of the radial sliding bearing static ring in FIG. 2A;

FIG. 2E is a schematic longitudinal cross-sectional view of a mold for making a radial sliding bearing static ring in FIG. 2A;

Fig. 2F is the longitudinal sectional schematic diagram of the lock nut in Fig. 2A;

3 is a cross-sectional view of the radial sliding bearing static ring of the present utility model under the second embodiment;

FIG. 4A is a schematic cross-sectional view of the non-welded joint when the manufacturing mold used for the radial sliding bearing static ring in the utility model is assembled with the radial sliding bearing static ring in FIG. 3;

4B is a schematic cross-sectional view of a welding joint when the manufacturing mold used for the radial sliding bearing static ring in the utility model is assembled with the radial sliding bearing static ring in FIG. 3;

4C is a cross-sectional view of the radial plain bearing static ring in FIG. 4B;

4D is a schematic longitudinal cross-sectional view of the stationary ring body of the radial sliding bearing stationary ring in FIG. 4A;

4E is a schematic longitudinal cross-sectional view of a mold for making a radial sliding bearing static ring in FIG. 4A;

5A is a schematic cross-sectional view of the utility model when the manufacturing mold for the radial sliding bearing static ring and the radial sliding bearing static ring are assembled together in the third embodiment;

5B is a schematic cross-sectional view of a welding joint when a manufacturing mold for a radial sliding bearing static ring and a radial sliding bearing static ring are assembled together in the third embodiment of the present invention;

FIG. 5C is a schematic longitudinal cross-sectional structural diagram of a mold for making a radial sliding bearing static ring in FIG. 5A;

6A is a schematic cross-sectional view of the utility model without welds when a manufacturing mold for a radial sliding bearing static ring and a radial sliding bearing static ring are assembled together in the fourth embodiment;

6B is a schematic cross-sectional view of a welding port when a manufacturing mold for a radial sliding bearing static ring and a radial sliding bearing static ring are assembled together in the fourth embodiment of the present invention;

FIG. 6C is a schematic view of the longitudinal cross-sectional structure of the manufacturing mold for the radial sliding bearing static ring in FIG. 6A;

7 is a schematic structural diagram of the friction-resistant member under the first embodiment;

8 is a schematic structural diagram of the friction-resistant member under the second embodiment;

FIG. 9 is a schematic structural diagram of the friction-resistant member under the third embodiment.

FIG. 10 is a schematic flowchart of a manufacturing process for a radial sliding bearing static ring provided in the present invention.

Reference numerals for the above drawings:

1. Static ring body; 11. The first inner cylindrical surface; 12. The second inner cylindrical surface; 13. Mounting hole; 14. The third end surface; 15. The fourth end surface; 16. The outer cylindrical surface of the static ring body; 2. Anti-friction parts; 21, the first layer; 22, the first end face; 23, the second layer; 24, the second end face; 3, the weld; 4, the pipe body; 41, the first outer cylindrical surface; 42, the second Outer cylindrical surface; 43, raised part; 44, shoulder; 45, external thread; 5, lock nut; 6, annular gap; 100, static ring of radial sliding bearing.

Detailed ways

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible deformations based on the present invention, and these should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication between two components, it can be directly connected, or it can be indirectly connected through an intermediate medium, For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the present application are for the purpose of describing particular embodiments only, and are not intended to limit the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, a radial sliding bearing static ring 100 is proposed. As shown in FIGS. 1 , 2C, 2D, 3, 4C, 4D, and 7 to 9, the radial sliding bearing static ring 100 It can include: a tubular static ring body 1, the radius of the first inner cylindrical surface 11 of the static ring body is the first radius, the radius of the second inner cylindrical surface 12 of the static ring body is the second radius, and the second inner cylindrical surface of the static ring body is the second radius. The surface 12 is provided with a plurality of installation holes 13 penetrating the side walls, and the plurality of installation holes 13 are evenly distributed along the circumferential direction of the static ring body 1; 2; The friction-resistant part 2 and the static ring body 1 are connected together by a brazing welding process through the welding joint 3; the first end face 22 of the friction-resistant part is higher than the first inner cylindrical surface 11 of the static ring body, and the self-friction part is The distance from the end surface 22 to the axis line of the stationary ring body 1 is the third radius, the second radius is greater than the third radius, and the third radius is greater than the first radius.

The static ring body 1 is in the shape of a circular tube with a certain wall thickness. The side wall of the stationary ring body 1 is provided with a plurality of installation holes 13 penetrating the side wall, and the plurality of installation holes 13 are evenly distributed along the circumferential direction of the stationary ring body 1 . As shown in FIG. 1 , FIG. 2C , and FIG. 2D , the mounting holes 13 may be one circle; as shown in FIG. 3 , FIG. 4C , and FIG. 4D , the mounting holes 13 may also be multiple circles, which are arranged along the axial direction of the stationary ring body 1 . As feasible, the static ring body 1 is made of high-hardness stainless steel or alloy steel, for example, alloy steel containing manganese, and the mass percentage of manganese may be between 0.65% and 2.0%. Specifically, it can be 0Cr17Ni4Cu4Nb stainless steel or SUS304 stainless steel or 40CrMnMo alloy steel or 40CrMnMoA alloy steel. After research, it is found that 0Cr17Ni4Cu4Nb stainless steel has excellent compressive strength, corrosion resistance, machinability and high elastic modulus. Or 40CrMnMoA alloy steel has good mechanical properties after air cooling, especially the hardness, which can reach HRC32~HRC36, which avoids using the traditional heat treatment process of high temperature quenching and low temperature tempering to improve the hardness, thus effectively simplifying the manufacturing process and reducing the manufacturing cost. drastically reduced. In order to improve the strength and wear resistance of the static ring body 1, the Brinell hardness of the static ring body 1 after quenching and tempering heat treatment needs to reach HB277-HB375.

As shown in FIG. 1 , FIG. 2C , FIG. 2D , FIG. 3 , FIG. 4C , FIG. 4D , and FIGS. 7 to 9 , the anti-friction member 2 is disposed in and matched with the mounting hole 13 . The mounting hole 13 is cylindrical, the friction-resistant member 2 is a cylinder, the diameter D of the mounting hole is larger than the diameter d of the friction-resistant member, and D-d=0.1mm-0.3mm (welding gap). In this way, the positional accuracy and welding strength of the friction-resistant member 2 after being installed in the installation hole 13 can be ensured.

As shown in FIG. 1 , FIG. 2C , FIG. 3 , FIG. 4C , FIG. 7 to FIG. 9 , from the first end surface 22 to the second end surface 24 of the anti-friction member at least a first layer 21 and/or a second layer 23 is provided. The layer 21 is polycrystalline diamond and the second layer 23 is cemented carbide. When the first layer 21 is polycrystalline diamond and the second layer 23 is cemented carbide, the friction-resistant member 2 is made of polycrystalline diamond and hard alloy sintered and compounded by diamond micropowder and cemented carbide substrate under ultra-high pressure and high temperature conditions. Alloy composite material, which not only has the high hardness, high wear resistance and good thermal conductivity of diamond, but also has the high strength, high impact toughness and high weldability of cemented carbide. Ideal material for other wear-resistant tools. As shown in FIG. 5A , FIG. 5B and FIG. 9 , the friction-resistant member 2 is an integral thermally stable polycrystalline diamond (Thermally Stable Poly-crystalline Diamond, TSP for short), and its heat-resistant temperature reaches 1150°. In other embodiments, the anti-friction member 2 can also be a solid carbide.

When the above-mentioned materials are selected for the friction-resistant member 2, the working life of the friction-resistant member 2 can be greatly extended. Since the working life of the radial sliding bearing mainly depends on the wear speed of the anti-friction member 2, when the working life of the anti-friction member 2 is prolonged, it is beneficial to ensure that the downhole tool has a long service life. In the past, how to fix the above-mentioned wear-resistant material with extremely high hardness, strength and wear resistance on the static ring body 1 efficiently, reliably and at low cost was a technical difficulty in the art.

When the anti-friction member 2 is arranged in the mounting hole 13, in order to achieve reliable fixation between the anti-friction member 2 and the static ring body 1, the anti-friction member 2 and the static ring body 1 are connected together by brazing through the welding port 3. . Specifically, the second end surface 24 of the friction-resistant member is lower than the outer cylindrical surface 16 of the static ring body to form a depression, and the welding port 3 formed by brazing is in the depression; Thereby, the anti-friction member 2 can be held against and connected.

As feasible, as shown in FIG. 1 , FIG. 2C , FIG. 3 and FIG. 4C , the first end surface 22 of the anti-friction member may be higher than the second inner cylindrical surface 12 of the static ring body, so that the frictional heat of the anti-friction member 2 can be sufficiently absorbed The coolant is taken away in time. As shown in FIGS. 7 to 9 , as feasible, the circumferential edges of the inner sidewall of the polycrystalline diamond of the first layer 21 of the friction-resistant member are all chamfered, so as to reduce stress concentration and the occurrence of sliding bearing movement during the working process of the bearing. The possibility of the ring colliding with the anti-friction element 2 . The chamfer height is c, the chamfer angle is a, and the thickness of the first layer 21 of polycrystalline diamond is h. As feasible, the inner side wall of the polycrystalline diamond of the first layer 21 of the friction-resistant member is a concave arc surface in the radial cross-section of the static ring body 1, and the arc surface radius is R1, which is convex with the radial sliding bearing moving ring. Cylindrical surface matching (radial sliding shaft concave-convex pair matching or male and female pair matching), large contact area, so small contact stress and long working life. As shown in Fig. 9, as feasible, the composite surface of the first layer 21 of polycrystalline diamond of the friction-resistant part and the second layer 23 of cemented carbide is a partial cylindrical surface, and the radius of the cylindrical surface is R2; Layer 21 of polycrystalline diamond is substantially equal in thickness, greatly increasing its strength.

The manufacturing process of the radial sliding bearing static ring 100 in the present application is as follows: firstly, on the outer cylindrical surface 16 of the static ring body, the mounting hole 13 vertically penetrating the side wall of the static ring body is milled from the outside to the inside, and then the friction-resistant parts 2 Installed into the mounting hole 13 from the outside to the inside, and then the friction-resistant member 2 is welded and fixed in the mounting hole 13 on the outer side wall of the static ring body 1 through a brazing process, and the welded joint 3 is located in the second friction-resistant member. The outer side of the end face 24 can abut against and fix the anti-friction member 2 to a greater extent. The first layer 21 of the friction-resistant member is polycrystalline diamond, which has the highest hardness and can greatly increase the wear resistance of the bearing static ring. Since the present application directly processes the mounting holes 13 penetrating the side walls on the outer side wall of the static ring body 1 from the outside to the inside, and brazes and welds the outer cylindrical surface 16 of the static ring body from the outside to the inside, therefore, the machining of the mounting holes 13 The difficulty and cost are greatly reduced, and at the same time, the machining accuracy of the mounting hole 13 can be completely guaranteed.

In order to facilitate the manufacture of the radial sliding bearing static ring 100, improve the accuracy of the friction-resistant member 2 on the static ring body 1, and make the brazing of the friction-resistant member 2 and the static ring body 1 easier, it is proposed in the application A manufacturing mold for the above-mentioned radial sliding bearing static ring 100, as shown in Figure 2A, Figure 2B, Figure 2E, Figure 2F, Figure 4A, Figure 4B, Figure 4E, Figure 5A, Figure 5B, Figure 5C, Figure 6A 6B and 6C, the production mold for the radial sliding bearing static ring 100 may include: a tube body 4, the radius of the first outer cylindrical surface 41 of the tube body is equal to the first radius, and the second outer cylindrical surface of the tube body The radius of 42 is equal to the second radius, the first outer cylindrical surface 41 of the pipe body has an annular convex portion 43, the radius of the outer cylindrical surface of the convex portion 43 is equal to the third radius, and the lower end of the second outer cylindrical surface 42 of the pipe body has an annular convex portion 43. The raised annular shoulder 44, the pipe body 4 can extend into the static ring body 1, the shoulder 44 can resist the fourth end face 15 of the static ring body, and the raised part 43 can resist the friction resistance in the mounting hole 13 of the static ring body Piece 2. Preferably, the upper end of the first outer cylindrical surface 41 of the pipe body has an external thread; the manufacturing mold for the radial sliding bearing static ring 100 may also include: a locking nut 5, the inner thread of which is connected to the first outer cylindrical surface of the pipe body. The external thread 45 on the upper end of 41 is screwed and connected, and can abut against the third end face 14 of the static ring body.

Specifically, as shown in FIG. 2E , FIG. 4E , FIG. 5C and FIG. 6C , the tube body 4 extends along the axial direction, and the tube body 4 is provided with a first outer cylindrical surface 41 , a second outer cylindrical surface 42 , and a raised portion 43 , shoulder 44 and external thread 45, the external thread 45 is located at the top of the pipe body 4, and the shoulder 44 is located at the bottom of the pipe body 4. The radius of the first outer cylindrical surface 41 of the pipe body is equal to the radius (first radius) of the first inner cylindrical surface 11 of the stationary ring body, and the transition between the first outer cylindrical surface 41 of the pipe body and the first inner cylindrical surface 11 of the stationary ring body is Cooperate. The radius of the second outer cylindrical surface 42 of the pipe body is equal to the radius (second radius) of the second inner cylindrical surface 12 of the stationary ring body, and the transition between the second outer cylindrical surface 42 of the pipe body and the second inner cylindrical surface 12 of the stationary ring body is Cooperate. Through the above method, when the pipe body 4 extends into the static ring body 1, the pipe body 4 and the static ring body 1 can be completely fixed and limited, and there will not be any shaking between them. Generally speaking, the material of the pipe body 4 can be selected from 15# or 20# steel, so as to have sufficient hardness and strength.

The first outer cylindrical surface 41 of the pipe body has an annular raised portion 43, and the raised portion 43 can be one or more, and the specific number is the same as the installation on the second inner cylindrical surface 12 of the static ring body. The number of turns of the hole 13 corresponds. As shown in FIGS. 2A, 2B, 2E, 5A, 5B, and 5C, the number of turns of the mounting holes 13 opened on the second inner cylindrical surface 12 of the stationary ring body is one, so the raised portion 43 is one . As shown in FIGS. 3 , 4A to 4E and 6A to 6C , the number of turns of the mounting holes 13 opened on the second inner cylindrical surface 12 of the stationary ring body is two, so there are two raised portions 43 . The radius of the outer cylindrical surface of the raised portion 43 is equal to the distance (third radius) from the first end surface 22 of the anti-friction member to the axis line of the stationary ring body 1 . In this way, when the pipe body 4 extends into the central hole of the stationary ring body 1, the position of the raised portion 43 corresponds to the friction-resistant member 2 in the mounting hole 13 of the stationary ring body 1, and the raised portion 43 can abut against the stationary ring. The anti-friction member 2 in the mounting hole 13 of the body can be positioned and limited, thereby improving the accuracy of the anti-friction member 2 installed on the static ring body 1, so that the anti-friction member 2 and the static ring body The brazing welding process between 1 becomes easier. The lower end of the second outer cylindrical surface 42 of the tube body has a raised annular shoulder 44, that is, the end of the lower end of the tube body 4 has a raised annular shoulder 44. When the tube body 4 extends into the static ring body 1, The shoulder 44 can abut against the fourth end face 15 of the stationary ring body. When the pipe body 4 extends into the stationary ring body 1 , there is an annular gap 6 between the first outer cylindrical surface 41 of the pipe body and the second inner cylindrical surface 12 of the stationary ring body.

1, 2A, 2B, 2E, 2F, 3, 4A, 4B and 4E, the upper end of the first outer cylindrical surface 41 of the pipe body has an external thread 45, that is, the upper end of the pipe body 4 The portion has external threads 45 . The locking nut 5 has an inner thread, and the inner thread of the locking nut 5 is connected with the outer thread 45 on the upper end of the first outer cylindrical surface 41 of the pipe body. The distance from the position where the shoulder 44 of the tube body touches the fourth end face 15 of the stationary ring body to the lower end of the outer thread on the upper end of the first outer cylindrical surface 41 of the tube body is less than or equal to the axial length of the stationary ring body, thereby ensuring the tightening process of the locking nut 5 can abut against the third end face 14 of the static ring body. Through the above method, the static ring body 1 and the pipe body 4 are completely fixed in the axial direction, and the friction-resistant member 2 can be positioned and limited in the axial direction, thereby improving the installation of the friction-resistant member 2 on the static ring body 1 axial accuracy.

When the pipe body 4 extends into the stationary ring body 1 and the shoulder 44 abuts against the fourth end face 15 of the stationary ring body, if the upper end of the pipe body 4 has an outer thread 45, the inner thread of the locking nut 5 is connected with the outer thread 45 of the pipe together, and abut against the third end face 14 of the stationary ring body; if there is no external thread 45 on the upper end of the pipe body 4, the upper end face of the first outer cylindrical surface 41 of the pipe body is flush with the third end face 14 of the stationary ring body, and can be A weight is pressed on the upper end surface so that the static ring body 1 and the pipe body 4 are completely fixed in the vertical direction. Afterwards, the raised portion 43 abuts the friction-resistant member 2 placed in the mounting hole 13 of the stationary ring body to position and limit the friction-resistant member 2 in the horizontal direction, and the friction-resistant member 2 and the static ring body 1 pass through Solder and flux are welded together by flame brazing or induction brazing. Wherein, the solder may be silver-based brazing solder. When the welding process is completed, when there is a lock nut 5, unscrew the lock nut 5, and then take out the pipe body 4 from the static ring body 1 to obtain the radial sliding bearing static ring 100 blank, as shown in Figure 2A, Figure 2 2B, 2C, 5A and 5B, a blank 100 of a radial sliding bearing static ring with a single-ring friction-resistant member 2 can be manufactured; as shown in FIGS. 4A, 4B, 4C, 6A and As shown in 6B, a blank of a radial sliding bearing static ring 100 with a double-ring friction-resistant member 2 can be manufactured. After the blank is cooled to room temperature, subsequent processing can be performed until the radial sliding bearing static ring 100 fully meets the size requirements.

FIG. 10 is a schematic flowchart of a manufacturing process for a radial sliding bearing static ring 100 provided in the present invention. As shown in FIG. 10 , the manufacturing process for the radial sliding bearing static ring 100 in the present application may be as follows:

S101: Prepare raw materials, the raw materials may include: a static ring body 1 having a mounting hole 13, a friction-resistant member 2, a pipe body 4, a locking nut 5, solder and flux.

S102: Clean the second inner cylindrical surface 12 and the mounting hole 13 of the static ring body, the friction-resistant member 2, and the first outer cylindrical surface 41, the second outer cylindrical surface 42 and the raised portion 43 of the pipe body, so as to ensure cleanliness. It is beneficial to improve the precision of the anti-friction element 2 being installed on the static ring body 1 .

S103: Assemble and make a mold. The static ring body 1 can be heated to 100°C to 150°C and then sleeved on the pipe body 4, so that the shoulder 44 is pressed against the fourth end face 15 of the static ring body, and the position of the raised portion 43 is the same as that of the static ring body. The anti-friction member 2 in the installation hole 13 corresponds to, and/or the inner thread of the lock nut 5 and the outer thread 45 of the pipe are screwed tightly against the third end face 14 of the stationary ring body.

S104: Install the friction-resistant member 2 and perform welding. Put the friction-resistant parts 2 into the mounting holes 13 one by one, and the protrusions 43 abut against the friction-resistant parts 2 in the mounting holes 13 of the stationary ring body. Afterwards, the friction-resistant parts 2 can be welded to the stationary ring body one by one by brazing. in hole 13. During welding, care should be taken to always ensure that the first end surface 22 of the anti-friction member abuts against the protruding portion 43 of the pipe body.

S105: Disassemble the manufacturing mold for the radial sliding bearing static ring 100. After the welding is completed, the lock nut 5 is unscrewed and removed, and the pipe body 4 is taken out from the stationary ring body 1 to obtain the radial sliding bearing stationary ring 100 blank.

S106: Grinding and turning the blank of radial sliding bearing static ring 100. After the blank of the radial sliding bearing static ring 100 is air-cooled to room temperature, grinding and turning are performed to make the size of the radial sliding bearing static ring 100 meet the technical requirements.

Using the manufacturing mold for the radial sliding bearing static ring 100 in the present application can realize the manufacturing and processing of the radial sliding bearing static ring 100, which can effectively reduce the processing difficulty and manufacturing cost. Since the radius of the first outer cylindrical surface 41 of the tube body is equal to the first radius, and the radius of the second outer cylindrical surface 42 of the tube body is equal to the second radius, the static ring body 1 can be sleeved on the outside of the tube body 4, and the two are assembled on the outside of the tube body 4. At the same time, the coaxiality between the first outer cylindrical surface 41 of the pipe body, the second outer cylindrical surface 42 of the pipe body, the first inner cylindrical surface 11 of the stationary ring body and the second inner cylindrical surface 12 of the stationary ring body is completely guaranteed. ; When the anti-friction member 2 is installed in the mounting hole 13, and the first end face 22 of the anti-friction member abuts against the outer cylindrical surface of the raised portion 43, the distance from the first end face 22 of the anti-friction member to the axis of the static ring body 1 The distance (third radius) is equal to the radius of the outer cylindrical surface of the raised portion 43, and the coaxiality between the first end surface 22 (partial cylindrical surface) of the friction-resistant member and the second inner cylindrical surface 12 of the static ring body is also fully guaranteed, This reduces the amount of reshaping and processing of the friction-resistant parts 2 in the later stage, and greatly reduces the processing cost, which is more conducive to the popularization of the radial sliding bearing static ring 100 in the present application, and better meets the use requirements of drilling downhole tools.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of" describing a combination shall include the identified element, ingredient, component or step as well as other elements, components, components or steps that do not materially affect the essential novel characteristics of the combination. Use of the terms "comprising" or "comprising" to describe combinations of elements, ingredients, components or steps herein also contemplates embodiments consisting essentially of those elements, ingredients, components or steps. By use of the term "may" herein, it is intended to indicate that "may" include any described attributes that are optional.

A plurality of elements, components, components or steps can be provided by a single integrated element, component, component or step. Alternatively, a single integrated element, component, component or step may be divided into separate multiple elements, components, components or steps. The disclosure of "a" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

The above descriptions are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the above-mentioned contents are only the embodiments adopted to facilitate the understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art to which the present utility model belongs, without departing from the spirit and scope disclosed by the present utility model, can make any modifications and changes in the form and details of the embodiments, but the patent of the present utility model The scope of protection is still subject to the scope defined by the appended claims.

Claims (10)

1. A preparation mould for radial sliding bearing stationary ring, characterized in that radial sliding bearing stationary ring includes: the radius of a first inner cylindrical surface of the static ring body is a first radius, the radius of a second inner cylindrical surface of the static ring body is a second radius, a plurality of mounting holes which vertically penetrate through the side wall of the static ring body are formed in the second inner cylindrical surface of the static ring body, and the mounting holes are uniformly distributed along the circumferential direction of the static ring body; the friction-resistant piece is arranged in the mounting hole and matched with the mounting hole; the friction-resistant piece and the static ring body are connected together through a weld opening by brazing; the first end surface of the friction-resistant piece is higher than the second inner cylindrical surface of the static ring body, the distance from the first end surface of the friction-resistant piece to the axial lead of the static ring body is a third radius, the second radius is larger than the third radius, and the third radius is larger than the first radius;

the manufacturing mold for the static ring of the radial sliding bearing comprises:

a tube having a first outer cylindrical surface radius equal to the first radius and a second outer cylindrical surface radius equal to the second radius, the first outer cylindrical surface having an annular protrusion thereon, the protrusion having an outer cylindrical surface radius equal to the third radius, the lower end of the second outer cylindrical surface having an annular shoulder; the pipe body can stretch into the center hole of the static ring body, the shoulder can abut against the fourth end face of the static ring body, and the protruding part can abut against the friction-resistant part in the mounting hole of the static ring body.

2. The mold for manufacturing a static ring of a radial sliding bearing according to claim 1, wherein the upper end portion of the first outer cylindrical surface of the pipe body is provided with an external thread; the manufacturing mold for the static ring of the radial sliding bearing further comprises: and the inner thread of the locking nut is tightly screwed and connected with the outer thread at the upper end part of the first outer cylindrical surface of the pipe body and can abut against the third end surface of the static ring body.

3. The mold for manufacturing a static ring of a radial sliding bearing according to claim 1, wherein the raised portion is located corresponding to the friction-resistant member in the installation hole of the static ring body when the shoulder of the pipe body abuts against the fourth end surface of the static ring body.

4. The mold for manufacturing a stationary ring for a radial sliding bearing according to claim 1, wherein said first outer cylindrical surface of said tubular body and said first inner cylindrical surface of said stationary ring body are in transition fit.

5. The mold for manufacturing a static ring of a radial sliding bearing according to claim 1, wherein the second outer cylindrical surface of the tubular body and the second inner cylindrical surface of the static ring body are in transition fit.

6. The mold for manufacturing a static ring of a radial sliding bearing according to claim 1, wherein the mounting hole is a cylindrical hole, the friction-resistant member is a cylinder, the diameter D of the mounting hole is larger than the diameter D of the friction-resistant member, and D-D is 0.1mm to 0.3 mm.

7. The manufacturing mold for a static ring of a radial sliding bearing according to claim 1, wherein the friction-resistant member and the static ring body are welded together by flame brazing or induction brazing using a solder and a flux.

8. The manufacturing mold for a static ring of a radial sliding bearing according to claim 7, wherein said solder is a silver-based brazing solder.

9. A manufacturing mold for a static ring of a radial sliding bearing according to claim 1, wherein an annular gap is provided between the first outer cylindrical surface of the tube body and the second inner cylindrical surface of the static ring body.

10. The mold for manufacturing a static ring of a radial sliding bearing according to claim 2, wherein a distance from a position where the shoulder of the pipe body abuts against the fourth end surface of the static ring body to a lower end of the external thread on the upper end portion of the first external cylindrical surface of the pipe body is less than or equal to an axial length of the static ring body.

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