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

Manufacturing die for radial sliding bearing static ring

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

In oil and gas well drilling downhole tools, especially downhole equipment such as turbine drilling tools, rotary steering and vertical drilling systems, the radial sliding bearing usually adopts drilling fluid as a cooling and lubricating medium, and due to high ambient temperature and pressure, tiny debris particles (such as quartz sand and the like) in the drilling fluid can easily cause rapid wear of the bearing after entering the bearing, thereby causing premature failure. Because bearings are important components in downhole tools, and are also wearing parts, one of the main tasks in downhole tool repair work is to replace the bearings. For example, chinese patent application No. CN202020509786.0 provides a PDC radial-righting sliding bearing, in which a plurality of PDC composite sheets are disposed on the inner cylindrical surface of the integral stationary ring substrate, and the PDC composite sheets are assembled in the blind holes on the inner cylindrical surface of the integral stationary ring substrate. It is known that it is very difficult to drill or mill a high-precision blind hole in the inner cylindrical surface of the stationary ring, and especially when the diameter of the inner cylindrical surface of the stationary ring is as small as a certain size (e.g. the diameter is less than 50mm), the difficulty and cost of machining a blind hole with extremely high requirements on diameter tolerance and depth tolerance in the inner cylindrical surface of the stationary ring are very high, and the blind hole cannot be tolerated by general enterprises.

SUMMERY OF THE UTILITY MODEL

The inventor in this application has developed a radial sliding bearing stationary ring to replace the existing PDC radial sliding bearing stationary ring, and the radial sliding bearing stationary ring that the inventor developed needs to fix the friction-resistant piece in the stationary ring body mounting hole by means of brazing, but without other auxiliary tools or dies, the friction-resistant piece is not easy to be installed in the stationary ring body mounting hole with high precision and is welded and fixed with the stationary ring body.

In order to overcome the above defects of the prior art, an embodiment of the present invention provides a manufacturing mold for a stationary ring of a radial sliding bearing, which is used for manufacturing the stationary ring of the radial sliding bearing, and can improve the accuracy of installing a friction-resistant member on a stationary ring body, so that the brazing of the friction-resistant member and the stationary ring body becomes easier.

The specific technical scheme of the embodiment of the utility model is as follows:

a manufacturing mold for a stationary ring of a radial sliding bearing, the stationary ring of the radial sliding bearing comprising: 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 tube having an annular protrusion on the first outer cylindrical surface, the protrusion having an outer cylindrical surface radius equal to the third radius, the tube having an annular shoulder at the end of the second outer cylindrical surface; 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.

Preferably, the upper end 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 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.

Preferably, when the pipe body shoulder abuts against the fourth end face of the static ring body, the position of the bulge corresponds to the position of the friction-resistant piece in the installation hole of the static ring body.

Preferably, the first outer cylindrical surface of the pipe body and the first inner cylindrical surface of the stationary ring body are in transition fit.

Preferably, the second outer cylindrical surface of the pipe body and the second inner cylindrical surface of the stationary ring body are in transition fit.

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 is 0.1mm to 0.3 mm.

Preferably, the friction-resisting member and the stationary ring body are welded together by flame brazing or induction brazing through a welding material and a welding flux.

Preferably, the solder is a silver-based brazing solder.

Preferably, an annular gap is formed 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 pipe body shoulder abuts against the fourth end face of the static ring body to the lower end of the external thread at the upper end part of the first outer cylindrical surface of the pipe body is less than or equal to the axial length of the static ring body.

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

the manufacturing die for the static ring of the radial sliding bearing can be used for manufacturing and processing the static ring of the radial sliding bearing, and the processing difficulty and the manufacturing cost can be effectively reduced. Because the radius of the first outer cylindrical surface of the pipe body is equal to the first radius, and the radius of the second outer cylindrical surface of the pipe body is equal to the second radius, the static ring body can be sleeved outside the pipe body, and when the first outer cylindrical surface of the pipe body, 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 are assembled together, the coaxiality between the first outer cylindrical surface of the pipe body, 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 ensured; when the antifriction spare is installed in the mounting hole, and when antifriction spare first terminal surface leaned on with the bellying outer cylinder face, from antifriction spare first terminal surface to the distance (third radius) of quiet ring body axial lead equals bellying outer cylinder face radius, the axiality between antifriction spare first terminal surface (partial face of cylinder) and the quiet ring body second inner cylinder face has also obtained the complete assurance, make later stage antifriction spare's plastic processing volume reduce, the processing cost reduces by a wide margin, be favorable to the popularization and application of radial slide bearing quiet ring in this application more, satisfy the user demand of drilling downhole tool better.

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

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case.

FIG. 1 is a cross-sectional view of a stationary ring of a radial sliding bearing according to a first embodiment of the present invention;

FIG. 2A is a schematic cross-sectional view of a manufacturing mold for a stationary ring of a radial sliding bearing according to the present invention, assembled with the stationary ring of the radial sliding bearing in FIG. 1, without a weld joint;

FIG. 2B is a schematic sectional view of a manufacturing mold for a stationary ring of a radial sliding bearing according to the present invention, with a weld formed thereon, assembled with the stationary ring of the radial sliding bearing of FIG. 1;

FIG. 2C is a cross-sectional view of the stationary ring of the radial slide bearing of FIG. 2B;

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

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

FIG. 2F is a schematic longitudinal cross-sectional view of the locking nut of FIG. 2A;

FIG. 3 is a cross-sectional view of a stationary ring of a radial sliding bearing according to a second embodiment of the present invention;

FIG. 4A is a schematic cross-sectional view of a manufacturing mold for a stationary ring of a radial sliding bearing according to the present invention, assembled with the stationary ring of the radial sliding bearing in FIG. 3, without a weld bead;

FIG. 4B is a sectional view of a manufacturing mold for a stationary ring of a radial sliding bearing according to the present invention, with a weld formed thereon, assembled with the stationary ring of the radial sliding bearing of FIG. 3;

FIG. 4C is a cross-sectional view of the stationary ring of the radial slide bearing of FIG. 4B;

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

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

FIG. 5A is a schematic cross-sectional view showing no weld joint when a manufacturing mold for a stationary ring of a radial sliding bearing according to a third embodiment of the present invention is assembled with the stationary ring of the radial sliding bearing;

FIG. 5B is a sectional view showing a weld formed when the manufacturing mold for the stationary ring of the radial sliding bearing according to the third embodiment of the present invention is assembled with the stationary ring of the radial sliding bearing;

FIG. 5C is a schematic longitudinal sectional view of the mold for manufacturing the stationary ring of the radial sliding bearing in FIG. 5A;

FIG. 6A is a schematic cross-sectional view showing no weld joint when a manufacturing mold for a stationary ring of a radial sliding bearing according to a fourth embodiment of the present invention is assembled with the stationary ring of the radial sliding bearing;

FIG. 6B is a schematic sectional view showing a weld formed when a manufacturing mold for a stationary ring of a radial sliding bearing according to a fourth embodiment of the present invention is assembled with the stationary ring of the radial sliding bearing;

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

FIG. 7 is a schematic view of a friction-resistant member according to a first embodiment;

FIG. 8 is a schematic view of a friction-resistant member according to a second embodiment;

fig. 9 is a schematic structural view of a friction-resistant member in a third embodiment.

Fig. 10 is a schematic flow chart of a manufacturing process for a stationary ring of a radial sliding bearing provided in the present invention.

Reference numerals of the above figures:

1. a stationary ring body; 11. a first inner cylindrical surface; 12. a second inner cylindrical surface; 13. mounting holes; 14. a third end face; 15. a fourth end face; 16. the outer cylindrical surface of the static ring body; 2. a friction resistant member; 21. a first layer; 22. a first end face; 23. a second layer; 24. a second end face; 3. welding a welding opening; 4. a pipe body; 41. a first outer cylindrical surface; 42. a second outer cylindrical surface; 43. a boss portion; 44. a shoulder; 45. an external thread; 5. locking the nut; 6. an annular gap; 100. radial sliding bearing stationary ring.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the utility model in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood 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 "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

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

In the present application, a radial sliding bearing stationary ring 100 is proposed, and as shown in fig. 1, 2C, 2D, 3, 4C, 4D, 7 to 9, the radial sliding bearing stationary ring 100 may include: the static ring comprises a tubular static ring body 1, wherein the radius of a first inner cylindrical surface 11 of the static ring body is a first radius, the radius of a second inner cylindrical surface 12 of the static ring body is a second radius, a plurality of mounting holes 13 penetrating through the side wall are formed in the second inner cylindrical surface 12 of the static ring body, and the mounting holes 13 are uniformly distributed along the circumferential direction of the static ring body 1; the friction-resistant piece 2 is arranged in the static ring body mounting hole 13 and matched with the mounting hole 13; the friction-resistant piece 2 and the static ring body 1 are connected together through a weld crater 3 by adopting a brazing welding process; the first end surface 22 of the friction-resistant member is higher than the first inner cylindrical surface 11 of the stationary ring body, the distance from the first end surface 22 of the friction-resistant member to the axial lead of the stationary ring body 1 is a third radius, the second radius is larger than the third radius, and the third radius is larger than the first radius.

The stationary ring body 1 is in a circular tube shape and has a certain wall thickness. Set up a plurality of mounting holes 13 that run through the lateral wall on the lateral wall of quiet ring body 1, a plurality of mounting holes 13 are along 1 circumference evenly distributed of quiet ring body. As shown in fig. 1, 2C, 2D, the mounting hole 13 may be a circle; as shown in fig. 3, 4C, and 4D, the mounting hole 13 may be formed in a plurality of turns and arranged in the axial direction of the stationary ring body 1. The stationary ring body 1 may be made of stainless steel or alloy steel with high hardness, such as alloy steel containing manganese, and the mass percentage of manganese may be between 0.65% and 2.0%. Specifically, it may be 0Cr17Ni4Cu4Nb stainless steel or SUS304 stainless steel or 40CrMnMo alloy steel or 40CrMnMoA alloy steel. The research shows that the 0Cr17Ni4Cu4Nb stainless steel has excellent compression strength, corrosion resistance, machinability and high elastic modulus, the compression strength can reach 1100 MPa-1300 MPa, and the corrosion resistance is the same as that of SUS304 stainless steel and SUS430 stainless steel; the 40CrMnMo alloy steel or the 40CrMnMoA alloy steel has good mechanical properties, particularly hardness after air cooling, can reach HRC 32-HRC 36, and avoids using the traditional heat treatment process of high-temperature quenching and low-temperature tempering to improve the hardness, thereby effectively simplifying the manufacturing process and greatly reducing the manufacturing cost. In order to improve the strength and wear resistance of the stationary ring body 1, the brinell hardness of the stationary ring body 1 after the quenching and tempering heat treatment needs to reach HB277 to HB 375.

As shown in fig. 1, 2C, 2D, 3, 4C, 4D, 7 to 9, the friction-resistant member 2 is disposed in the mounting hole 13 and is fitted to the mounting hole 13. The mounting hole 13 is cylindrical, the friction-resistant member 2 is cylindrical, 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 0.3mm (welding gap). This ensures the positional accuracy and welding strength of the friction-resistant member 2 after it is mounted in the mounting hole 13.

As shown in fig. 1, 2C, 3, 4C, and 7 to 9, at least a first layer 21 and/or a second layer 23 are provided from the first end surface 22 to the second end surface 24 of the friction-resistant member, the first 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 hard alloy, the friction-resistant piece 2 is a polycrystalline diamond and hard alloy composite material formed by sintering and compounding diamond micropowder and a hard alloy substrate under the condition of ultrahigh pressure and high temperature, has the high hardness, high wear resistance and good thermal conductivity of diamond and the high strength, high impact toughness and high weldability of hard alloy, and is an ideal material for manufacturing cutting tools, drill bits, bearings and other wear-resistant tools. As shown in fig. 5A, 5B and 9, the anti-friction member 2 is a Thermally Stable polycrystalline Diamond (TSP) having a heat resistance temperature of 1150 °. In other embodiments, the friction resistant member 2 may be a unitary piece of cemented carbide.

After the friction-resistant piece 2 is made of the materials, the service life of the friction-resistant piece 2 can be greatly prolonged. Since the service life of the radial sliding bearing mainly depends on the wear rate of the friction-resistant member 2, it is advantageous to ensure a longer service life of the downhole tool after the service life of the friction-resistant member 2 is extended. In the past, how to fix the wear-resistant material with extremely high hardness, strength and wear resistance on the stationary ring body 1 with high efficiency, reliability and low cost is a technical difficulty in the field.

When the friction-resistant member 2 is disposed in the mounting hole 13, in order to achieve reliable fixation between the friction-resistant member 2 and the stationary ring body 1, the friction-resistant member 2 and the stationary ring body 1 are joined together by brazing through the weld crater 3. Specifically, the second end surface 24 of the friction-resistant member is lower than the outer cylindrical surface 16 of the stationary ring body to form a recess in which the weld crater 3 formed by brazing is located; the weld crater 3 is fused with the outer side wall of the stationary ring body 1 so as to be able to abut and connect the friction-resistant member 2.

As a practical matter, as shown in fig. 1, 2C, 3 and 4C, the first end surface 22 of the friction-resistant member may be higher than the second inner cylindrical surface 12 of the stationary ring body, so that the frictional heat energy of the friction-resistant member 2 is carried away by a sufficient amount of the coolant in time. As shown in fig. 7 to 9, it is possible that the circumferential edges of the inner side walls of the first layer 21 of polycrystalline diamond of the friction-resistant member are chamfered, so as to reduce the possibility of stress concentration and collision of the moving ring of the sliding bearing with the friction-resistant member 2 during the operation of the bearing. The chamfer height is c, the chamfer angle is a, and the thickness of the first layer 21 of polycrystalline diamond is h. As a feasible possibility, the inner side wall of the first layer 21 of the polycrystalline diamond of the friction-resistant piece is a concave arc surface in the radial cross section of the static ring body 1, the radius of the arc surface is R1, and the inner side wall is matched with the convex cylindrical surface of the movable ring of the radial sliding bearing (the convex and concave surfaces of the radial sliding shaft are matched in pairs or the male and female sliding shafts are matched in pairs), so that the contact area is large, the contact stress is small, and the service life is long. As shown in fig. 9, the composite surface of the polycrystalline diamond of the first layer 21 and the cemented carbide of the second layer 23 of the friction-resistant piece is a partial cylindrical surface, and the radius of the cylindrical surface is R2; thus, the thickness of the polycrystalline diamond of the first layer 21 of the friction-resistant piece is basically equal, and the strength of the friction-resistant piece is greatly improved.

The manufacturing process of the radial sliding bearing static ring 100 in the application is as follows: firstly, a mounting hole 13 which vertically penetrates through the side wall of the static ring body is milled from outside to inside on an outer cylindrical surface 16 of the static ring body, then the friction-resistant piece 2 is mounted into the mounting hole 13 from outside to inside, then the friction-resistant piece 2 is welded and fixed in the mounting hole 13 on the outer side wall of the static ring body 1 through a brazing welding process, and a welded opening 3 formed by welding is positioned on the outer side of a second end surface 24 of the friction-resistant piece to support and fix the friction-resistant piece 2 to a greater extent. The first layer 21 of the friction-resistant member is polycrystalline diamond, and the polycrystalline diamond has the highest hardness, so that the abrasion resistance of the bearing static ring can be greatly improved. Because this application is direct to be processed out the mounting hole 13 that runs through the lateral wall at 1 lateral wall outside-in of quiet ring body, carries out the brazing welding again on the outer face of cylinder 16 outside-in of quiet ring body, consequently, the processing degree of difficulty and the cost of mounting hole 13 all obtain reducing by a wide margin, also can guarantee the machining precision of mounting hole 13 completely simultaneously.

In order to facilitate the manufacture of the radial sliding bearing stationary ring 100, to improve the accuracy of the attachment of the friction-resistant member 2 to the stationary ring body 1, so that brazing of the friction-resistant member 2 to the stationary ring body 1 becomes easier, a manufacturing mold for the above-described radial sliding bearing stationary ring 100 is proposed in the application, as shown in fig. 2A, 2B, 2E, 2F, 4A, 4B, 4E, 5A, 5B, 5C, 6A, 6B, and 6C, and the manufacturing mold for the radial sliding bearing stationary ring 100 may include: the radius of body 4, the first outer cylinder face 41 of body equals first radius, the radius of body second outer cylinder face 42 equals the second radius, have annular bellying 43 on the first outer cylinder face 41 of body, the outer cylinder face radius of bellying 43 equals the third radius, the tip has bellied annular circular shoulder 44 under the body second outer cylinder face 42, body 4 can stretch into quiet ring body 1, shoulder 44 can support quiet ring body fourth terminal surface 15, bellying 43 can support the antifriction piece 2 in quiet ring body mounting hole 13. Preferably, the upper end of the first outer cylindrical surface 41 of the tubular body has an external thread; the manufacturing mold for the stationary ring 100 of the radial sliding bearing may further include: and the locking nut 5 is tightly connected with the external thread 45 at the upper end part of the first outer cylindrical surface 41 of the pipe body through internal threads and can abut against the third end surface 14 of the static ring body.

Specifically, as shown in fig. 2E, 4E, 5C, and 6C, the pipe body 4 extends in the axial direction, the pipe body 4 is provided with a first outer cylindrical surface 41, a second outer cylindrical surface 42, a boss 43, a shoulder 44, and an external thread 45, the external thread 45 is located uppermost of the pipe body 4, and the shoulder 44 is located lowermost 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 first outer cylindrical surface 41 of the pipe body and the first inner cylindrical surface 11 of the stationary ring body are in transition fit. 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 second outer cylindrical surface 42 of the pipe body and the second inner cylindrical surface 12 of the stationary ring body are in transition fit. Can make when body 4 stretches into quiet ring body 1 through above-mentioned mode, body 4 realizes fixed spacing completely with quiet ring body 1, can not have any between the two and rock. Generally, 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 is provided with an annular convex part 43, and the number of the convex parts 43 can be one or more, and the specific number of the convex parts 43 corresponds to the number of the circles of the mounting holes 13 arranged on the second inner cylindrical surface 12 of the stationary ring body. As shown in fig. 2A, 2B, 2E, 5A, 5B, and 5C, the number of the mounting holes 13 formed in the second inner cylindrical surface 12 of the stationary ring body is one, and therefore, the number of the protrusions 43 is one. As shown in fig. 3, 4A to 4E, and 6A to 6C, the number of the turns of the mounting hole 13 formed in the second inner cylindrical surface 12 of the stationary ring body is two, and therefore, the number of the protrusions 43 is two. The outer cylindrical surface radius of the convex portion 43 is equal to the distance (third radius) of the friction-resistant member first end surface 22 from the axis of the stationary ring body 1. So, when body 4 stretched into quiet ring body 1 centre bore, the position that bellying 43 was located was corresponding with antifriction spare 2 in the quiet ring body 1 mounting hole 13, and bellying 43 can support antifriction spare 2 in the quiet ring body mounting hole 13 to can fix a position and spacing antifriction spare 2, and then improve the precision of antifriction spare 2 installation to on the quiet ring body 1, make the brazing welding process between antifriction spare 2 and the quiet ring body 1 become easier. The lower end of the second outer cylindrical surface 42 of the tubular body has a raised annular shoulder 44, i.e. the end of the lower end of the tubular body 4 has a raised annular shoulder 44, the shoulder 44 being able to abut against the fourth end surface 15 of the static ring body when the tubular body 4 is inserted into the static ring body 1. When the tubular body 4 is inserted into the stationary ring body 1, an annular gap 6 is provided between the first outer cylindrical surface 41 of the tubular body and the second inner cylindrical surface 12 of the stationary ring body.

As shown in fig. 1, 2A, 2B, 2E, 2F, 3, 4A, 4B and 4E, the upper end of the first outer cylindrical surface 41 of the tube body has an external thread 45, i.e., the upper end of the tube body 4 has an external thread 45. The lock nut 5 has an internal thread, and the internal thread of the lock nut 5 is connected to the external thread 45 of the upper end portion of the first outer cylindrical surface 41 of the pipe body. The distance from the position where the pipe body shoulder 44 abuts against the fourth end face 15 of the static ring body to the lower end of the external thread at the upper end part of the first outer cylindrical surface 41 of the pipe body is less than or equal to the axial length of the static ring body, so that the third end face 14 of the static ring body can be abutted in the tightening process of the locking nut 5. In this way, the static ring body 1 and the pipe body 4 are completely fixed in the axial direction, the friction-resistant piece 2 can be positioned and limited in the axial direction, and the axial precision of the friction-resistant piece 2 mounted on the static ring body 1 is improved.

When the pipe body 4 extends into the static ring body 1 and the shoulder 44 abuts against the fourth end surface 15 of the static ring body, if the upper end part of the pipe body 4 is provided with the external thread 45, the internal thread of the locking nut 5 is connected with the external thread 45 of the pipe body and abuts against the third end surface 14 of the static ring body; if the upper end of the pipe body 4 has no external thread 45, the upper end surface of the first outer cylindrical surface 41 of the pipe body is flush with the third end surface 14 of the stationary ring body, and a weight can be pressed on the upper end surface, so that the stationary ring body 1 and the pipe body 4 are completely fixed in the vertical direction. Then, the protruding portion 43 abuts against the friction-resistant member 2 placed in the mounting hole 13 of the stationary ring body, the friction-resistant member 2 is positioned and limited in the horizontal direction, and the friction-resistant member 2 and the stationary ring body 1 are welded together by using flame brazing or induction brazing through solder and flux. Wherein the solder may be a silver-based brazing solder. When the welding process is finished and the lock nut 5 exists, the lock nut 5 is unscrewed, and then the pipe body 4 is taken out of the static ring body 1, so that a blank of the static ring 100 of the radial sliding bearing is obtained, as shown in fig. 2A, fig. 2B, fig. 2C, fig. 5A and fig. 5B, the blank of the static ring 100 of the radial sliding bearing with a single circle of friction-resistant piece 2 can be manufactured; as shown in fig. 4A, 4B, 4C, 6A and 6B, a blank for a static ring 100 of a radial sliding bearing having a double-ring friction-resistant member 2 can be manufactured. And after the blank is cooled to room temperature in the air, performing subsequent processing until the blank completely meets the size requirement of the radial sliding bearing static ring 100.

Fig. 10 is a schematic flow chart of a manufacturing process for a stationary ring 100 of a radial sliding bearing provided in the present invention. As shown in fig. 10, the manufacturing process for the stationary ring 100 of the radial sliding bearing in the present application may be as follows:

s101: preparing raw materials, which may include: the static ring comprises a static ring body 1 with a mounting hole 13, a friction-resistant piece 2, a pipe body 4, a lock nut 5, solder and welding flux.

S102: wash quiet ring body second inner cylindrical surface 12 and mounting hole 13, antifriction spare 2 and the first outer cylindrical surface 41 of body, the second outer cylindrical surface 42 and bellying 43 to ensure clean, also be favorable to improving the precision that antifriction spare 2 installed to quiet ring body 1 in the later stage.

S103: and assembling and manufacturing the die. The stationary ring body 1 can be heated to 100-150 ℃ and then sleeved on the pipe body 4, the shoulder 44 is abutted against the fourth end face 15 of the stationary ring body, the position of the protruding portion 43 corresponds to the friction-resistant piece 2 in the mounting hole 13 of the stationary ring body, and/or the internal thread of the lock nut 5 is screwed with the external thread 45 of the pipe body and abutted against the third end face 14 of the stationary ring body.

S104: the friction-resistant member 2 was attached and welded. The friction-resistant pieces 2 are placed into the mounting holes 13 one by one, the protruding portions 43 abut against the friction-resistant pieces 2 in the static ring body mounting holes 13, and then the friction-resistant pieces 2 can be welded into the static ring body mounting holes 13 one by adopting a brazing process. During welding, care must be taken to ensure that the first end surface 22 of the friction-resistant member always abuts against the tube boss 43.

S105: the manufacturing mold for the stationary ring 100 of the radial sliding bearing is disassembled. After the welding is finished, the locking nut 5 is unscrewed and taken down, and the pipe body 4 is taken out from the static ring body 1 to obtain the blank of the static ring 100 of the radial sliding bearing.

S106: and grinding and turning the blank of the radial sliding bearing static ring 100. And after the blank of the static ring 100 of the radial sliding bearing is cooled to room temperature in an air mode, grinding and turning are carried out, so that the size of the static ring 100 of the radial sliding bearing meets the technical requirement.

The manufacturing die for the static ring 100 of the radial sliding bearing in the application can be used for manufacturing and processing the static ring 100 of the radial sliding bearing, and the processing difficulty and the manufacturing cost can be effectively reduced. Because the radius of the first outer cylindrical surface 41 of the pipe body is equal to the first radius, and the radius of the second outer cylindrical surface 42 of the pipe body is equal to the second radius, the static ring body 1 can be sleeved outside the pipe body 4, and when 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 static ring body and the second inner cylindrical surface 12 of the static ring body are assembled together, the coaxiality among 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 static ring body and the second inner cylindrical surface 12 of the static ring body is completely ensured; install in mounting hole 13 when antifriction spare 2, and antifriction spare first end face 22 supports with bellying 43 outer cylindrical surface and leans on when, the distance (third radius) from antifriction spare first end face 22 to the axial lead of quiet ring body 1 equals bellying 43 outer cylindrical surface radius, the axiality between antifriction spare first end face 22 (partial cylinder face) and quiet ring body second inner cylindrical surface 12 has also obtained the complete assurance, make later stage antifriction spare 2's plastic processing volume reduce, the processing cost is low by a wide margin, more be favorable to radial slide bearing quiet ring 100's in this application popularization, satisfy the user demand of drilling downhole tool better.

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, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

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

The above description is only a few embodiments of the present invention, and although the embodiments of the present invention are described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as 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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