Integral graphite lubrication retainer

Abstract

The utility model provides an integral graphite lubrication retainer. Pockets for installing steel balls are formed in the retainer, bosses which are the same as the pockets in number and are arranged alternately are distributed on the inner circumferential face and the outer circumferential face of the retainer, and the bosses comprise outer diameter bosses and inner diameter bosses so that the structural strength can be enhanced and the self-lubricating function can be provided. In addition, pockets of the retainer are designed to be square pockets, conic curve pockets or square arc pockets, so that the friction transfer lubricating effect is optimized, abrasion is reduced, and the inclination resistance and the high-speed stability are improved. According to the design, the lubrication condition of the bearing is improved, the service life is prolonged, the machining process is simplified, and the assembly efficiency is improved. The utility model is suitable for working environments requiring high temperature resistance, corrosion resistance, wear resistance, radiation resistance and self-lubricating performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field, concretely relates to a whole graphite lubrication retainer. BACKGROUND

[0002] Most of the nuclear reactor drive mechanisms use rolling bearings to achieve the required action function. The bearings are in a high-temperature water medium environment with radiation for a long time, and cannot be lubricated with grease. They have requirements for high-temperature resistance, corrosion resistance, wear resistance, radiation resistance, and self-lubrication. The use of ordinary bearing materials and lubrication cannot meet the special working condition requirements.

[0003] The prior art mostly uses metal retainers or full-ball bearing structures without retainers. The lack of effective lubrication limits the service life of the bearings, the bearing parts wear seriously, the friction noise is large during operation, and even jamming occurs. Common solid lubricants include graphite, molybdenum disulfide, polytetrafluoroethylene, and metal oxides. Due to the neutron and gamma radiation of the nuclear reactor, the performance of polytetrafluoroethylene engineering plastics changes after irradiation. The oxides of lead and metal sulfides (molybdenum disulfide) decompose Pb or S ions in high-temperature water media, which may cause local corrosion of other structural materials.

[0004] Graphite has good self-lubrication and radiation resistance in water medium environments, especially excellent anti-stick-slip performance, making it suitable for forward and reverse rotation and frequent start-stop conditions. However, the corrosion of binders and fillers needs to be considered for pure graphite, and the strength, toughness, and wear resistance of graphite itself do not meet the requirements of the whole retainer. Graphite isolation blocks or rings can isolate steel balls and transfer lubrication, but when subjected to combined radial and axial loads, the ball's running track is not in the same plane, and periodic axial displacement occurs during operation. Isolation blocks or rings cannot effectively guide them, and their high-speed stability and anti-overturning torque are inferior to the whole retainer.

[0005] There is an urgent need in the market to develop a high-performance graphite retainer, and the bearing needs to have good mechanical properties and effective lubrication for the whole retainer. INVENTION CONTENTS

[0006] To solve the above technical problems, the utility model provides a whole graphite lubrication retainer, and in addition, the utility model further provides a rolling bearing using the above retainer. The design of the retainer allows it to work in a high-temperature water medium environment with radiation and provides effective self-lubrication.

[0007] The utility model discloses a technical scheme is: a kind of integral graphite lubrication retainer, the retainer is made of metal base graphite lubricating material or carbon fiber graphite lubricating material, the retainer is equipped with pocket hole for installing steel ball, the inner and outer circumferential surface of the retainer is equipped with several evenly distributed boss along circumferential direction respectively, the boss includes outer diameter boss and inner diameter boss and the number is same with the pocket hole, the boss and pocket hole position are alternately distributed.

[0008] As preferred scheme, the cross section of the boss is trapezoidal, the boss is arranged in the middle of the retainer radial surface, and the inclined edge of the boss is parallel to the retainer.

[0009] As preferred scheme, the difference between the outer diameter of the boss and the diameter of the outer ring stop edge of the retainer is not less than 0.03 times the diameter of the steel ball arranged in the pocket hole, the width of the outer diameter boss and the width of the inner diameter boss are 0.2-0.5 times the diameter of the steel ball arranged in the pocket hole, and the angle between the inclined surface of the boss and the plane of the retainer is between 30° and 60°.

[0010] As preferred scheme, the pocket hole of the retainer includes square pocket hole and conic curve pocket hole, the square pocket hole and the conic curve pocket hole are alternately distributed, and the conic curve pocket hole is circular or elliptical.

[0011] As preferred scheme, the pocket hole is square-arc pocket hole, the axial width of the square-arc pocket hole is equal to the circumferential width of the two straight sides, and the radius of the arc surface of the square-arc pocket hole is greater than 0.5 times the axial width.

[0012] As preferred scheme, the cross section of the boss is semicircular structure, and the arc surface of the boss is parallel to the circumferential edge of the retainer.

[0013] The utility model also provides a rolling bearing, which comprises an inner ring, an outer ring, a rolling body and the above-mentioned graphite lubrication retainer.

[0014] The utility model has the advantages that:

[0015] Based on the deficiencies of the prior art, the utility model provides an integral graphite lubrication retainer, which has the following technical effects by optimizing the material and design.

[0016] One, the whole graphite lubrication retainer is made of metal-based graphite lubrication material or carbon fiber graphite lubrication material, the metal-based self-lubricating material takes nickel / copper as the reinforced matrix and graphite as the solid lubricant, the carbon fiber self-lubricating material takes carbon fiber as the reinforced framework and pyrolytic carbon as the matrix and lubricant, the graphite lubricant is uniformly dispersed in the retainer material, the self-lubricating effect is provided when the steel ball and the retainer are in friction, graphite powder continuously generated is stirred in high-temperature water to play a role of supplementing lubrication, a continuous lubricating film is formed, and the bearing is not blocked due to the falling of the block, the bearing lubrication effect is improved, and the service life of the bearing is prolonged.

[0017] Secondly, the reinforcing boss is arranged in the middle of the inner and outer diameters of the retainer, the overall structural strength of the retainer and the overall content of graphite are further improved, the width and height of the boss are controlled, and the friction and wear between the boss and the groove of the retainer are reduced.

[0018] Thirdly, the pocket hole can be a square-arc pocket hole, the square-arc pocket hole has small contact area with the steel ball on the axial two sides, the anti-inclination ability of the retainer is improved, and the axial wear is reduced, the axial two sides have large contact area with the steel ball, the friction and transfer lubrication effect is improved, the radius of the arc is adjusted, and the beam width and strength are effectively improved.

[0019] Fourthly, the whole graphite retainer has simple structure, does not need riveting reinforcement and graphite inlaying treatment, the machining process is simplified, and the efficiency and precision are high, the height of the reinforcing boss does not interfere with the inner and outer retainer, and the bearing assembly is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is a structural schematic view of the present application;

[0022] Figure 2 It is a sectional view of the present application;

[0023] Figure 3 It is a structural schematic view of using the square-arc pocket hole;

[0024] Figure 4 It is a sectional view of using the square-arc pocket hole;

[0025] Figure 5 It is a specific structural schematic view of the square-arc pocket hole;

[0026] Figure 6 Structure diagram of using arc convex platform;

[0027] Figure 7 Sectional view of arc convex platform retainer;

[0028] Figure 8 Structure diagram of using square arc hole and arc convex platform;

[0029] Figure 9 Sectional view of square arc hole and arc convex platform retainer;

[0030] Figure 10 Structure diagram of square arc hole;

[0031] In the figure: 1, retainer; 2, outer diameter convex platform; 3, inner diameter convex platform; 4, conic curve hole; 5, square hole; 6, square arc hole;

[0032] B1, outer diameter convex platform width; B2, inner diameter convex platform width; ɑ1, angle between both sides of outer convex platform and radial plane; ɑ2, angle between both sides of inner convex platform and radial plane; dc1, inner convex platform diameter; Dc1, outer convex platform diameter; L1, axial width of conic curve hole; L2, axial width of square hole; L3, axial width of square arc hole; L4, circumferential width of straight surface on both sides of square arc hole; R1, radius of arc surface of square arc hole; R2, radius of outer diameter convex platform; R3, radius of inner diameter convex platform. DETAILED DESCRIPTION

[0033] Hereinafter, the present application will be described in detail through exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment can be beneficially incorporated into other embodiments without further recitation.

[0034] It should be noted that, unless otherwise defined, technical terms or scientific terms used in the present application should be understood as the common meaning understood by those skilled in the art to which the present application belongs. The "one", "a" or "the" and similar words used in the present application patent application specification and claims do not represent quantity limitation, but indicate that there is at least one; "including" or "containing" and similar words indicate that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, but do not exclude other elements or objects with the same function.

[0035] In order to more clearly describe the specific structural composition of the integral graphite lubricating retainer, the accompanying drawings are combined Figure 1 - the accompanying drawings Figure 10 The following embodiments are described.

[0036] Embodiment one,

[0037] The embodiment provides a whole graphite lubrication retainer, which comprises a retainer 1, the retainer 1 is provided with pockets for mounting rolling elements, and the inner and outer circumferential surfaces of the retainer 1 are respectively provided with a plurality of outer diameter bosses 2 and inner diameter bosses 3 which are uniformly distributed along the circumferential direction, the bosses and the pockets are in an alternating distribution.

[0038] The retainer 1 is made of a nickel-based graphite lubrication material, the apparent hardness is 55HBW, the transverse breaking strength is 226MPa, and the impact toughness is 7.1J / cm 2 The strength and impact resistance of the graphite lubrication retainer are improved, the bearing lubrication effect is improved, the service life of the bearing is improved, and the lubrication problem of the bearing under special working conditions is solved.

[0039] The bosses are uniformly distributed along the circumferential direction of the retainer 1, the bosses are located in the middle of the retainer 1, the number of the bosses is the same as that of the pockets, the difference between the outer diameter Dc1 of the boss and the diameter of the outer ring rib is not less than 0.03Dw (Dw is the diameter of the steel ball), the difference between the inner diameter dc1 of the boss and the diameter of the inner ring rib is not less than 0.03Dw, the width B1 of the outer diameter boss and the width B2 of the inner diameter boss are (0.2-0.5)Dw, and the angles ɑ1 and ɑ2 between the two sides of the inner and outer diameter bosses and the radial plane are 30°-60°, so that the structural strength and the wear life of the retainer 1 are further improved.

[0040] The conical curve pockets 4 and the square pockets 5 on the retainer 1 are in an alternating distribution, the axial width L2 of the square pocket 5 is equal to the axial width L1 of the conical curve pocket 4, the adaptability of the retainer 1 to working conditions such as forward and reverse rotation, frequent start and stop and overturning torque is enhanced, the excessive wear of the pockets of the retainer is reduced, and the friction transfer lubrication performance and the overall wear life of the retainer 1 are improved.

[0041] In the embodiment, the conical curve pockets 4 can be circular or elliptical.

[0042] The embodiment further comprises a bearing using the above retainer 1, the bearing comprises an inner ring and an outer ring, and further comprises steel balls and the retainer 1 between the inner ring and the outer ring, and the bearing comprises angular contact ball bearings, three-point contact ball bearings, four-point contact ball bearings and the like. The rings and the steel balls are made of nickel-based alloy, cobalt-based alloy and stainless steel material, the room temperature hardness of the nickel-based alloy is greater than or equal to 57HRC, the room temperature hardness of the cobalt-based alloy is greater than or equal to 52HRC, and the room temperature hardness of the stainless steel is greater than or equal to 58HRC. The rings and the steel balls are coated with TiN, CrN or carbon-based coating, so that the wear life of the bearing is further improved.

[0043] In the working process, when the outer diameter boss 2 and the inner diameter boss 3 on the retainer 1 are in contact with the steel ball or the ring respectively, the graphite lubricant contained in the retainer 1 is gradually released due to friction; these graphite particles can form a lubricating film on the contact surface. Since the graphite lubricant is uniformly dispersed in the material of the retainer 1, it has self-lubricating effect during operation, and the continuously generated graphite powder is stirred in the high-temperature water, which not only helps to supplement the lubricant lost due to operation, but also further enhances the lubricating effect of the fine graphite particle suspension, thereby improving the overall lubricating condition of the bearing. At the same time, the inner diameter boss 2 and the outer diameter boss 3 arranged effectively improve the structural strength of the retainer 1, prolonging the service life of the bearing.

[0044] Example two,

[0045] The embodiment provides a whole graphite lubricating retainer, which comprises a retainer 1, the retainer 1 is provided with a rolling groove for installing a rolling element, and a plurality of outer diameter bosses 2 and inner diameter bosses 3 are uniformly distributed on the inner and outer circumferential surfaces of the retainer 1 in the circumferential direction, the number of the bosses is the same as that of the grooves, and the bosses and the grooves are alternately distributed.

[0046] The embodiment is different from the embodiment 1 in that the retainer conical curve grooves 4 and the square grooves 5 in the embodiment 1 are alternately distributed. In the embodiment, a square-arc groove 6 is adopted, the axial width L3 of the square-arc groove is equal to the circumferential width L4 of the two straight surfaces, the radius R1 of the arc surface is greater than L3 / 2, which further reduces the abnormal wear of the retainer 1, improves the transfer lubricating effect of the retainer 1, and reduces the influence of the circular groove on the structural strength of the retainer 1, which is beneficial to ensuring the strength of the retainer 1.

[0047] The embodiment further comprises a bearing using the retainer 1, the bearing comprises an inner ring and an outer ring, and further comprises a steel ball and the retainer 1 between the inner ring and the outer ring, and the bearing comprises an angular contact ball bearing, a three-point contact ball bearing, a four-point contact ball bearing and the like. The ring and the steel ball are made of a nickel-based alloy, a cobalt-based alloy or stainless steel, the hardness of the nickel-based alloy at room temperature is greater than or equal to 57HRC, the hardness of the cobalt-based alloy at room temperature is greater than or equal to 52HRC, and the hardness of the stainless steel at room temperature is greater than or equal to 58HRC. The groove of the ring and the surface of the steel ball are coated with TiN, CrN or carbon-based coating, which further improves the wear life of the bearing.

[0048] Example three,

[0049] The embodiment provides a whole graphite lubricating retainer, which comprises a retainer 1, wherein the retainer 1 is provided with roller pockets for mounting rollers, and a plurality of outer diameter bosses 2 and inner diameter bosses 3 are uniformly distributed along the circumferential direction on the inner and outer circumferential surfaces of the retainer 1, the bosses and the pockets are in an alternating distribution and have the same number.

[0050] The embodiment is different from the embodiment 1 in that the retainer in the embodiment 1 is made of a nickel-based graphite lubricating material, and the embodiment is different from the embodiment 1 in that a carbon fiber self-lubricating material is used, the apparent hardness is 80HS, the transverse breaking strength is 230MPa, the impact toughness is 5.2J / cm 2 , the graphitization degree is 60%, the wear resistance of the retainer is further improved, the friction coefficient is reduced, and the wear life is more than doubled.

[0051] The embodiment further comprises a bearing using the retainer 1, the bearing comprises an inner ring and an outer ring, further comprises steel balls and the retainer 1 between the inner ring and the outer ring, and the bearing comprises angular contact ball bearings, three-point contact ball bearings, four-point contact ball bearings and the like. The retainer 1 is made of a nickel-based alloy, a cobalt-based alloy or stainless steel material, the nickel-based alloy has a hardness of greater than or equal to 57HRC at room temperature, the cobalt-based alloy has a hardness of greater than or equal to 52HRC at room temperature, and the stainless steel has a hardness of greater than or equal to 58HRC at room temperature. The raceway of the retainer and the surface of the steel ball are plated with TiN, CrN or carbon-based coating, so that the wear life of the bearing is further improved.

[0052] Embodiment four,

[0053] The embodiment provides a whole graphite lubricating retainer, which comprises a retainer 1, wherein the retainer 1 is provided with roller pockets for mounting rollers, and a plurality of outer diameter bosses 2 and inner diameter bosses 3 are uniformly distributed along the circumferential direction on the inner and outer circumferential surfaces of the retainer 1, the bosses and the pockets are in an alternating distribution and have the same number.

[0054] The embodiment is different from the embodiment 1 in that the retainer in the embodiment 1 is made of a nickel-based graphite lubricating material, and the embodiment is different from the embodiment 1 in that a carbon fiber self-lubricating material and a square-arc pocket 6 are used, so that the friction and wear of the retainer are further reduced, the transfer lubrication effect and the wear life of the retainer 1 are improved.

[0055] The embodiment also includes a bearing using the cage 1, which comprises an inner ring and an outer ring, and also comprises steel balls and the cage 1 between the inner ring and the outer ring, including angular contact ball bearings, three-point contact ball bearings, four-point contact ball bearings and the like structural types. The rings and the steel balls are made of nickel-based alloy, cobalt-based alloy, stainless steel material, the nickel-based alloy has a hardness of greater than or equal to 57 HRC at room temperature, the cobalt-based alloy has a hardness of greater than or equal to 52 HRC at room temperature, and the stainless steel has a hardness of greater than or equal to 58 HRC at room temperature. The rings and the steel balls are plated with TiN, CrN or carbon-based coating on the surface of the rings and the steel balls, so as to further improve the wear life of the bearing.

[0056] Embodiment five,

[0057] The embodiment provides a whole graphite lubricating cage, which comprises a cage 1, the cage 1 is provided with a plurality of roller pockets for mounting rollers, a plurality of outer diameter bosses 2 and inner diameter bosses 3 are uniformly distributed in the circumferential direction on the inner and outer circumferential surfaces of the cage 1, the number of the bosses is the same as that of the pockets, and the bosses and the pockets are alternately distributed.

[0058] Different from the above embodiment, the inner diameter boss 2 and the outer diameter boss 3 in the embodiment adopt a circular arc shape, the circular arc radius is 0.25Dw≤R2≤0.5Dw, 0.25Dw≤R3≤0.5Dw, 0.25Dw≤R3≤0.5Dw, 0.25Dw≤R4≤0.5Dw (Dw is the diameter of the steel ball), and the graphite generated by the friction and wear between the cage circular boss and the ring channel can further improve the cage transfer lubrication effect, provide better continuous lubrication for the rolling body and the raceway, reduce the friction and wear between the rolling body and the raceway, and improve the wear life of the bearing.

[0059] The embodiment also includes a bearing using the cage 1, which comprises an inner ring and an outer ring, and also comprises steel balls and the cage 1 between the inner ring and the outer ring, including angular contact ball bearings, three-point contact ball bearings, four-point contact ball bearings and the like structural types. The rings and the steel balls are made of nickel-based alloy, cobalt-based alloy, stainless steel material, the nickel-based alloy has a hardness of greater than or equal to 57 HRC at room temperature, the cobalt-based alloy has a hardness of greater than or equal to 52 HRC at room temperature, and the stainless steel has a hardness of greater than or equal to 58 HRC at room temperature. The rings and the steel balls are plated with TiN, CrN or carbon-based coating on the surface of the rings and the steel balls, so as to further improve the wear life of the bearing.

[0060] It should be noted that although the utility model has been described through the above embodiments, the utility model can also have other various embodiments. Those skilled in the art can obviously make various corresponding changes and modifications to the utility model without departing from the spirit and scope of the utility model, but these changes and modifications should all belong to the scope protected by the claims and equivalents of the utility model.

Claims

1. An integral graphite lubricated retainer, comprising a retainer (1), characterized in that, The retainer (1) is made of metal-based graphite lubricating material or carbon fiber graphite lubricating material. The retainer (1) is provided with pockets for installing steel balls. The inner and outer circumferential surfaces of the retainer (1) are provided with a number of bosses evenly distributed along the circumferential direction. The bosses include outer diameter bosses (2) and inner diameter bosses (3) and the number is the same as the pockets. The positions of the bosses and pockets are alternately distributed.

2. The integral graphite lubrication retainer according to claim 1, characterized in that, The boss has a trapezoidal cross section and is located in the middle of the radial surface of the retainer (1), with the hypotenuse of the boss parallel to the retainer (1).

3. The integral graphite lubrication retainer according to claim 2, characterized in that, The difference between the outer diameter (Dc1) of the boss and the outer ring flange diameter of the cage (1) is not less than 0.03 times the diameter of the steel ball located in the pocket.

4. The integral graphite lubrication retainer according to claim 3, characterized in that, The width of the outer diameter boss (B1) and the width of the inner diameter boss (B2) are both 0.2 to 0.5 times the diameter of the steel ball located in the pocket.

5. The integral graphite lubrication retainer according to claim 4, characterized in that, The angle between the inclined surfaces of the boss and the plane of the retainer (1) is between 30° and 60°.

6. The integral graphite lubrication retainer according to claim 1, characterized in that, The retainer (1) has pockets including square pockets (5) and conical pockets (4), which are alternately distributed.

7. The integral graphite lubrication retainer according to claim 1, characterized in that, The pocket is a square-rounded arc pocket (6), the axial width (L3) of the square-rounded arc pocket (6) is equal to the circumferential width (L4) of the straight surfaces on both sides, and the radius of the arc surface of the square-rounded arc pocket (6) is greater than 0.5 times the axial width (L3).

8. The integral graphite lubrication retainer according to claim 1, characterized in that, The protrusion has a semi-circular cross-section, and the arc surface of the protrusion is parallel to the circumferential edge of the cage (1).

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