MSR ball bearing capable of moving in plane and verification method of MSR ball bearing

Abstract

The invention relates to the technical field of bearings, in particular to an MSR ball bearing capable of moving in a plane. The MSR ball bearing capable of moving in the plane specifically comprises a retainer, an upper thrust disc, a lower thrust disc, a plurality of balls, an upper seat mechanism and a base mechanism, the retainer and the balls are located between the upper thrust disc and the lower thrust disc, the end face of the upper thrust disc and the end face of the lower thrust disc abut against the surfaces of the balls, the retainer is provided with a rolling cavity for containing the balls, and the upper thrust disc and the lower thrust disc are located between the upper seat mechanism and the base mechanism. The retainer comprises an upper frame piece, a lower frame piece, an outer support and an inner support, the outer support and the inner support are located between the upper frame piece and the lower frame piece, and the inner support is located in the outer support. The invention has the advantages that the friction coefficient is small, displacement is avoided, and larger load can be borne.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly to an MSR ball bearing and method for planar movement. Background Art

[0002] A steam separator reheater (hereinafter referred to as "MSR") is one of the key equipment in a nuclear power plant steam turbine system, and is a large heat exchanger with the combined functions of steam separation and two-stage steam reheating. The MSR plays a crucial role in the long-term safe operation and improvement of the operation efficiency of the steam turbine system. In some scenarios of large pressure vessel equipment, bridges and buildings, a device is needed to support an object and compensate for the relative displacement changes caused by factors such as thermal expansion differences and earthquakes between two objects. For example, between the support of a large high-temperature horizontal pressure vessel equipment and the installation foundation, a sliding support is required, and the following methods are adopted in the prior art:

[0003] Prior Art 1: Spherical sliding support, as Figure 1 shown, the concave plate 1 is connected to the equipment support 3, the convex plate 2 is connected to the installation foundation 4, and the concave plate 1 and the convex plate 2 are in spherical contact and can slide relative to each other. Limitations of Prior Art 1: Adopting sliding friction, with a large friction coefficient. When the weight of the supported equipment is heavy, a large frictional force needs to be overcome, and the displacement compensation response is slow; a certain rotation angle will be generated when the equipment slides.

[0004] Prior Art 2: Hanger support structure, as Figure 2 shown, using a high-tension spring plus hanger support, the equipment can swing relatively slightly. Limitations of Prior Art 2: The load-bearing capacity of the high-tension spring is limited and not suitable for large equipment; a certain rotation angle will be generated when the equipment swings; a steel platform needs to be set up additionally, increasing the floor area.

[0005] Therefore, in view of the deficiencies of the prior art, an MSR ball bearing for planar movement is provided. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, the present invention provides an MSR ball bearing for planar movement, aiming to solve the problems of large friction coefficient, easy displacement, and inability to bear large loads.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] An MSR ball bearing for planar movement includes: a cage, an upper thrust plate, a lower thrust plate, a plurality of spheres, an upper seat mechanism, and a base mechanism;

[0009] The cage and the spheres are located between the upper thrust plate and the lower thrust plate. The end faces of the upper thrust plate and the lower thrust plate are in contact with the surfaces of the spheres. The cage is provided with rolling cavities for placing a plurality of the spheres. The upper thrust plate and the lower thrust plate are located between the upper seat mechanism and the base mechanism;

[0010] The cage includes an upper shelf plate, a lower shelf plate, an outer support, and an inner support. The outer support and the inner support are located between the upper shelf plate and the lower shelf plate, and the inner support is located inside the outer support.

[0011] As a further improvement of the technical solution of the present invention, the upper shelf plate is provided with a plurality of first round holes, the lower shelf plate is provided with a plurality of second round holes, and the diameters of the first round holes and the second round holes are smaller than the diameter of the spheres.

[0012] As a further improvement of the technical solution of the present invention, the upper shelf plate and the lower shelf plate are further provided with a plurality of first connection holes and second connection holes. A plurality of the first connection holes are located at the periphery of the upper shelf plate and the lower shelf plate, and the second connection holes are located in the middle of the upper shelf plate and the lower shelf plate. The first connection holes are fixedly connected to the outer support, and the second connection holes are fixedly connected to the inner support.

[0013] As a further improvement of the technical solution of the present invention, the outer support is provided with a spacer ring. The spacer ring is located between the upper shelf plate and the lower shelf plate, and the spacer ring is provided with through holes adapted to the first connection holes.

[0014] As a further improvement of the technical solution of the present invention, the outer support and the inner support have the same height.

[0015] As a further improvement of the technical solution of the present invention, the upper seat mechanism includes a positioning column, a transition plate, an upper seat body, and an upper seat connecting plate. The upper thrust plate is limit-connected to the transition plate through the positioning column, the transition plate is fixedly connected to the upper seat body, and the upper seat body is fixedly connected to the upper seat connecting plate.

[0016] As a further improvement of the technical solution of the present invention, the base mechanism includes a base body, an ear plate, an oil baffle ring, and an adjusting assembly. The lower thrust plate is fixedly connected to the base body, the oil baffle ring is fixedly connected to the base body, the base body is fixedly connected to the ear plate, and the adjusting assembly is connected to the base body;

[0017] The adjusting assembly includes a first adjusting member and a second adjusting member. The first adjusting member is in top contact connection with the outer wall of the upper thrust plate, and the second adjusting member is in top contact connection with the outer wall of the cage.

[0018] As a further improvement of the technical solution of the present invention, the upper seat mechanism further includes a protective cover, and the protective cover is fixedly connected to the transition disc.

[0019] A verification method for an MSR ball bearing that makes planar movement, applicable to the above-mentioned MSR ball bearing that makes planar movement, includes the following steps:

[0020] S1: Calculate the bearing capacity of the bearing, the sum of the plastic deformations of the spheres and the raceways:

[0021]

[0022] S2: Calculate the fatigue life of the bearing;

[0023] S3: Calculate the horizontal displacement of (X, Y):

[0024] S4: Calculate the friction coefficient:

[0025] As a further improvement of the technical solution of the present invention, in step S2, it includes the following steps:

[0026] A1: First, divide the MSR ball bearing into columns, and calculate the rated rolling element load of each column of bearing rings:

[0027]

[0028] A2: Calculate the rated dynamic load of the upper thrust plate and the lower thrust plate:

[0029] A3: Calculate the rated dynamic load of the overall bearing:

[0030] A4: Calculate the bearing fatigue life:

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] In the MSR ball bearing that makes planar movement provided by the present invention, the surface of the sphere abuts against the upper thrust plate and the lower thrust plate, and the contact surface uses rolling friction, with a small friction coefficient; when displacement occurs, the upper clip and the lower clip remain parallel through the outer support and the inner support, avoiding displacement; multiple spheres are used to ensure that the MSR ball bearing can bear a large load; through analysis and calculation, the fatigue life cycle and high bearing capacity are ensured. The MSR ball bearing that makes planar movement of the present invention has the characteristics of small friction coefficient, avoiding displacement, and being able to bear a large load. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following further details the technology of the present invention in conjunction with the drawings and specific embodiments:

[0034] Figure 1 is a schematic structural view of the prior art 1;

[0035] Figure 2 is a schematic structural view of the prior art 1;

[0036] Figure 3 is a schematic structural view of the MSR ball bearing for planar movement of the present invention;

[0037] Figure 4 is a cross-sectional view of the cage in the MSR ball bearing for planar movement of the present invention;

[0038] Figure 5 is a top view of the cage in the MSR ball bearing for planar movement of the present invention;

[0039] Figure 6 is a schematic view of the weld in the MSR ball bearing for planar movement of the present invention.

[0040] In the figure:

[0041] 1. Cage; 11. Upper frame piece; 12. Lower frame piece; 13. Outer support; 14. Inner support;

[0042] 2. Upper thrust plate; 3. Lower thrust plate; 4. Sphere;

[0043] 5. Upper seat mechanism; 51. Positioning column; 52. Transition plate; 53. Upper seat body; 54. Upper seat connecting plate; 55. Protective cover;

[0044] 6. Base mechanism; 61. Base body; 62. Ear plate; 63. Oil baffle ring; 64. First adjusting part; 65. Second adjusting part. Detailed implementation manners

[0045] The following will clearly and completely describe the concept, specific structure and technical effects generated by the present invention in combination with the embodiments and the drawings, so as to fully understand the purpose, scheme and effects of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The same reference numerals used in the drawings indicate the same or similar parts everywhere.

[0046] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in the present invention are only relative to the mutual positional relationship of the components of the present invention in the drawings.

[0047] Refer to Figures 1 to 6, An MSR ball bearing for planar movement, comprising a cage 1, an upper thrust plate 2, a lower thrust plate 3, a plurality of balls 4, an upper seat mechanism 5 and a base mechanism 6;

[0048] In one embodiment, the cage 1 and the balls 4 are located between the upper thrust plate 2 and the lower thrust plate 3. The end faces of the upper thrust plate 2 and the lower thrust plate 3 are in contact with the surfaces of the balls 4. The cage 1 is provided with a rolling cavity for placing a plurality of balls 4. The upper thrust plate 2 and the lower thrust plate 3 are located between the upper seat mechanism 5 and the base mechanism 6. The cage 1 includes an upper shelf 11, a lower shelf 12, an outer support 13 and an inner support 14. The outer support 13 and the inner support 14 are located between the upper shelf 11 and the lower shelf 12, and the inner support 14 is located inside the outer support 13. Preferably, the cage 1 and the balls 4 are combined into one body, which solves the problems of inconvenient bearing assembly and installation. At the same time, it avoids the friction between the end face of the cage 1 and the bearing raceway, increases the number of balls loaded, improves the bearing capacity of the bearing, and facilitates the assembly and installation of the bearing. The balls 4 rotate flexibly in the rolling cavity and will not fall out of the rolling cavity, and the cage 1 will not generate sliding friction with the bearing raceway.

[0049] Wherein, the surfaces of the balls 4 are in contact with the upper thrust plate 2 and the lower thrust plate 3, and the contact surfaces use rolling friction with a small friction coefficient. When displacement occurs, the upper clip and the lower clip remain parallel through the outer support 13 and the inner support 14 to avoid displacement. Multiple balls 4 are used to ensure that the MSR ball bearing can withstand a large load. Through analysis and calculation, the fatigue life cycle and high bearing capacity are ensured. The MSR ball bearing for planar movement of the present invention has the characteristics of small friction coefficient, avoiding displacement, and being able to withstand a large load.

[0050] In one embodiment, the upper shelf 11 is provided with a plurality of first round holes, and the lower shelf 12 is provided with a plurality of second round holes. The diameters of the first round holes and the second round holes are smaller than the diameter of the balls 4. For the cage 1 with the same outer diameter size, more round holes can be distributed, increasing the number of balls loaded in the bearing and improving the bearing capacity of the bearing. The upper shelf 11 and the lower shelf 12 are also provided with a plurality of first connection holes and second connection holes. A plurality of first connection holes are located at the periphery of the upper shelf 11 and the lower shelf 12, and the second connection holes are located in the middle of the upper shelf 11 and the lower shelf 12. The first connection holes are fixedly connected to the outer support 13, and the second connection holes are fixedly connected to the inner support 14. The upper shelf 11 and the lower shelf 12 are fixedly connected to the outer support 13 and the inner support 14 through fasteners. The fasteners are rivets or other suitable fasteners for firmly connecting the upper shelf 11, the lower shelf 12, the outer support 13 and the inner support 14 together.

[0051] In one embodiment, the outer support 13 is provided with a spacer ring. The spacer ring is located between the upper shelf 11 and the lower shelf 12, and the spacer ring is provided with through holes adapted to the first connection holes. The outer support 13 and the inner support 14 have the same height.

[0052] In one embodiment, the upper seat mechanism 5 includes a positioning post 51, a transition disk 52, an upper seat body 53, an upper seat connecting plate 54,

[0053] The upper thrust disk 2 is limitedly connected to the transition disk 52 through the positioning post 51. The transition disk 52 is fixedly connected to the upper seat body 53, and the upper seat body 53 is fixedly connected to the upper seat connecting plate 54.

[0054] In one embodiment, the base mechanism 6 includes a base body 61, an ear plate 62, an oil baffle ring 63 and an adjusting assembly. The lower thrust disk 3 is fixedly connected to the base body 61, the oil baffle ring 63 is fixedly connected to the base body 61, the base body 61 is fixedly connected to the ear plate 62, and the adjusting assembly is connected to the base body 61; the adjusting assembly includes a first adjusting member 64 and a second adjusting member 65. The first adjusting member 64 is in abutting connection with the outer wall of the upper thrust disk 2, and the second adjusting member 65 is in abutting connection with the outer wall of the cage 1. Preferably, one is welded in each circumferentially symmetric direction of the base body 61. The ear plate 62 is slightly higher than the bottom surface of the base body 61, so as to avoid the ear plate 62 bearing the gravity load after the bearing is installed. Each ear plate 62 is provided with 2 connecting holes for connecting to the steel platform. The oil baffle ring 63 is a metal ring with a certain thickness and strength, and is welded to the base body 61 along the circumferential direction of the base body 61. On the one hand, after the oil baffle ring 63 is welded to the base body 61, it can store lubricating grease to protect the inside of the bearing from dust and other foreign objects. On the other hand, when the horizontal displacement of the steel ball cage assembly is too large, it can block its movement. Four threaded holes are provided in the circumferential direction of the oil baffle ring 63. During transportation, screws can be installed through these threaded holes to fix the bearing and prevent the upper and lower components of the bearing from moving during transportation. When the bearing is installed, the steel ball cage 1 and the upper thrust disk 2 can be adjusted to be at the center of the bearing raceway by adjusting the screws. After the adjustment is completed, the threaded holes are blocked with plugs to prevent grease leakage.

[0055] In one embodiment, the upper seat mechanism 5 further includes a protective cover 55. The protective cover 55 is fixedly connected to the transition disk 52. When the bearing makes a planar movement, the transition disk 52 and the protective cover 55 move together with the upper thrust disk 2.

[0056] In one embodiment, the materials of key components such as the upper thrust plate, lower thrust plate, and sphere are selected to ensure that the load and fatigue life can meet the target requirements. The performance and reliability of the bearing largely depend on the materials used to manufacture the bearing parts. The contact part between the raceway of the bearing ring and the rolling element repeatedly bears a large contact stress. During long-term operation, fatigue spalling of the material is likely to occur, leading to bearing damage. Therefore, the materials of the rolling bearing rings and rolling elements must have the advantages of high hardness, strong anti-fatigue property, wear resistance, and good dimensional stability. High-carbon chromium bearing steel has good hardenability. After heat treatment, it is easy to obtain a uniform and stable microstructure, high and uniform hardness, high contact fatigue strength, and good wear resistance. GCr15 is generally used for bearing rings and rolling elements. For bearing rings with a larger cross-section and rolling elements with a larger diameter, GCr15SiMn with good hardenability is used. Considering the operating conditions of the MSR ball bearing, the bearing bears a static load for a long time. The raceway surfaces of the upper and lower thrust plates of the bearing and the sphere must have the performance characteristics of high hardness, strong anti-fatigue property, and good dimensional stability. Therefore, the upper and lower thrust plates of the bearing are made of GCr15SiMn, a special bearing steel, which complies with the provisions of GB / T18254. The heat treatment adopts a high-temperature tempering at 200 °C, which complies with the provisions of GB / T34891. The sphere is made of GCr15, which complies with the provisions of GB / T18254. The heat treatment adopts a high-temperature tempering at 200 °C, which complies with the provisions of GB / T34891.

[0057] In one embodiment, the main parameters of the bearing are designed, including the ball diameter and the number of balls. The load-carrying capacity of the bearing mainly depends on the ball diameter and the number of balls. Increasing both the ball diameter and the number of balls can improve the load-carrying capacity of the bearing. Due to the limitation of the bearing diameter direction size and the bearing horizontal displacement amount, when the ball diameter is increased, the number of balls will decrease. By selecting different ball diameters and numbers of balls, the rated load of the bearing is calculated. When the ball diameter is 22.225 mm and the number of balls is 244, the rated load of the bearing is 1700 kN; when the ball diameter is 20 mm and the number of balls is 348, the rated load of the bearing is 2000 kN; when the ball diameter is 18.575 mm and the number of balls is 378, the rated load of the bearing is 1800 kN. It can be seen from the calculation results that by selecting appropriate ball diameters and numbers of balls, the rated load of the bearing can be significantly improved. Therefore, after the optimization of the main parameters of the bearing, the number of balls is determined to be 348 and the ball diameter is 20 mm.

[0058] In one embodiment, the precision of the designed bearing is such that the bearing moves in a way that the balls move back and forth in one direction or any direction within a certain range in a plane along the bearing raceway. Therefore, the bearing precision and friction coefficient are mainly ensured by the precision of the parts of the upper and lower thrust plates and the precision of the steel balls. At present, there is no such bearing standard in China. To meet the requirements of high precision and low friction coefficient of the bearing, based on the design and manufacturing experience of the parts of the disc-shaped bearing, the flatness of the bearing thrust plate raceway is ≤0.03 mm, the surface roughness Ra of the raceway is ≤0.2 μm, the precision grade of the steel balls should be better than or equal to G20, and the total weight of the bearing is 362.8 Kg.

[0059] In one embodiment, calculate the weld seams and fillet welds. There are 4 welds on the MSR ball bearing. The transition plate and the protective cover, the upper seat body and the upper seat connecting plate, the base body and the base body ear plate, and the base body and the retaining ring are all connected by welding. Among them, when the MSR ball bearing is working, the retaining ring may be subjected to a horizontal force of 200 KN. The other 3 welds are hardly affected after the bearing is installed. Therefore, only calculate the weld strength after welding the retaining ring. According to the characteristics of the MSR ball bearing parts, all welds use 45° fillet welds. The weld between the retaining ring and the base body uses double-sided fillet welds. To ensure the welding quality and the strength of the weld seam, the fillet weld size should be adjusted according to the different thicknesses of the base metal. When the thickness of the base metal is between 6 mm and 20 mm, the fillet weld size should be about 1 / 4 to 1 / 3 of the thickness of the base metal. When the thickness of the base metal is greater than 20 mm, the fillet weld size should be increased accordingly, generally about 1 / 3 of the thickness of the base metal. The thickness of the retaining ring is 16 mm, and the fillet weld size is selected as 5 mm. The thickness of the upper seat connecting plate is 24.5 mm, and the fillet weld size is selected as 8 mm. The thickness of the base body ear plate is 30.5 mm, and the fillet weld size is selected as 10 mm.

[0060] A verification method for an MSR ball bearing that makes planar movement, applicable to the above-mentioned MSR ball bearing that makes planar movement, includes the following steps:

[0061] S1: Calculate the bearing capacity of the bearing. The basic static load rating of the bearing refers to the load when the sum of the plastic deformations of the rolling elements and the raceways that bear the maximum contact stress is 1 / 10000 of the rolling element diameter. The sum of the plastic deformations of the sphere and the raceway:

[0062] S2: Calculate the fatigue life of the bearing;

[0063] S3: When the MSR ball bearing is working, the upper thrust plate and the components above it must be able to horizontally displace back and forth within a range of ±80 mm. The horizontal displacement amount is determined by the bearing structure size. Calculate the horizontal displacement amounts of (X, Y):

[0064] S4: Calculate the friction coefficient:

[0065] In step S2, the following steps are included:

[0066] A1: First, divide the MSR ball bearings into columns and calculate the rated rolling element load of each column of bearing rings:

[0067]

[0068] A2: Calculate the rated dynamic load of the upper thrust plate and the lower thrust plate:

[0069] A3: Calculate the rated dynamic load of the overall bearing:

[0070] A4: Calculate the bearing fatigue life:

[0071] In step S1, in the formula, δ s Total plastic deformation of the steel ball in contact with one raceway, in mm, Q is the rolling element contact load in N, D w Steel ball diameter, ρ 1Ι 、 The first and second principal curvatures of the contact object 1, in mm -1 , ρ 2Ι 、 The first and second principal curvatures of the contact object 2, in mm -1 , the bearing rated static load Coa = Q × Z, Z is the number of steel balls. After calculation, Coa = 2000 KN, meeting the design requirements.

[0072] In step A1, in the formula, Q c Bearing rated rolling element load in N, for bearing steel A = 98.1, R is the rolling element bus curvature radius, r is the groove curvature radius, D w Rolling element diameter,

[0073]

[0074] Z is the number of rolling elements in each column, d m Rolling element pitch diameter, where the symbols above apply to the upper thrust plate and the symbols below apply to the lower thrust plate.

[0075] In step A2, in the formula, C i Rated dynamic load of the upper thrust plate of the bearing in N, Q cij Rated rolling element load of the upper thrust plate of each column of bearings in N, Z j The number of rolling elements in each column n is the number of columns. C e Rated dynamic load of the lower thrust plate of the bearing in N, Q cej Rated rolling element load of the lower thrust plate of each column of bearings in N, Z jThe number of rolling elements per row, and n is the number of rows.

[0076] In step A3, in the formula, w is 10 / 3, C is the rated dynamic load of the whole set of bearings, in N.

[0077] In step A4, in the formula, L 10 The basic rated life of the bearing with a reliability of 90%, in revolutions, C is the rated dynamic load of the bearing in N, and P is the equivalent dynamic load of the bearing in N.

[0078] The equivalent dynamic load of the bearing is the self-weight of the equipment borne by the bearing, 1400 KN. After calculation, the basic rated life of the bearing L 10 = 1.23×10^6 times, meeting the requirement of a fatigue life greater than 6000 times.

[0079] In step S3, in the formula, d is the inner diameter dimension of the retaining ring in mm, and D is the outer diameter dimension of the upper thrust plate in mm. The inner diameter dimension of the retaining ring is 578 mm, and the outer diameter dimension of the upper thrust plate is 415 mm. After calculation, the (X, Y) horizontal displacement is 81.5 mm > ±80 mm, meeting the design requirements.

[0080] In step S4, in the formula: n is the number of rows of balls; mu is the weight of the upper thrust plate of the ball cage assembly in kg; g is the acceleration due to gravity in units of 10 m / s²; fk is the rolling friction coefficient, for the ball linear guide fk = 0.001 (cm); r is the radius of the rolling element in cm; P1 is the normal load on one guide in N. After calculation, the equivalent friction coefficient is 0.0023, and the actual rolling friction coefficient is subject to the measured data.

[0081] It also includes step S5, calculating the weld strength. For a fillet weld, the fracture usually occurs along the 45° section of the weld, as Figure 6 shown, the weld strength of the T-joint weld,

[0082] In the formula,

[0083] M is the bending moment borne by the retaining ring, l is the circumference of the retaining ring, a is the size of the weld throat, δ is the thickness of the base metal, τ p ′ is the allowable shear stress of the weld. Assuming the distance from the load position to the weld is L2, then the bending moment borne by the weld is:

[0084] M = F × L2.

[0085] Substitute the force F on the retaining ring, the outer circumference l of the retaining ring, and the size a of the weld throat into the calculation. The bending stress τ borne by the weld = 148 MPa;

[0086] According to the allowable stress of 42CrMo steel material After calculation, it is 691 MPa;

[0087] The allowable shear stress of the weld is It is 489 MPa after calculation;

[0088] After the retaining ring is welded, the strength of the weld seam is less than the allowable shear stress of the weld seam, and the weld seam strength is sufficient.

[0089] For other contents of the MSR spherical bearing that makes planar movement described in the present invention, reference may be made to the prior art and will not be elaborated herein.

[0090] The above are only preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

[0091] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0092] In the present invention, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An MSR spherical bearing for planar movement, characterized in that, Comprising: A cage, an upper thrust plate, a lower thrust plate, a plurality of spheres, an upper seat mechanism and a base mechanism; The cage and the spheres are located between the upper thrust plate and the lower thrust plate. The end faces of the upper thrust plate and the lower thrust plate are in contact with the surfaces of the spheres. The cage is provided with a rolling cavity for placing a plurality of the spheres. The upper thrust plate and the lower thrust plate are located between the upper seat mechanism and the base mechanism; The cage includes an upper frame piece, a lower frame piece, an outer support and an inner support. The outer support and the inner support are located between the upper frame piece and the lower frame piece, and the inner support is located inside the outer support.

2. The MSR ball bearing for planar movement according to claim 1, characterized in that, The upper frame piece is provided with a plurality of first round holes, and the lower frame piece is provided with a plurality of second round holes. The diameters of the first round holes and the second round holes are smaller than the diameter of the spheres.

3. The MSR ball bearing for planar movement according to claim 2, characterized in that, The upper frame piece and the lower frame piece are further provided with a plurality of first connection holes and second connection holes. A plurality of the first connection holes are located at the periphery of the upper frame piece and the lower frame piece, and the second connection holes are located in the middle of the upper frame piece and the lower frame piece. The first connection holes are fixedly connected to the outer support, and the second connection holes are fixedly connected to the inner support.

4. The MSR ball bearing for planar movement according to claim 3, characterized in that, The outer support is provided with a spacer ring. The spacer ring is located between the upper frame piece and the lower frame piece, and the spacer ring is provided with through holes adapted to the first connection holes.

5. A kind of MSR ball bearing for planar movement according to claim 1, characterized in that, The outer support and the inner support have the same height.

6. The MSR ball bearing for planar movement according to claim 1, wherein The upper seat mechanism includes a positioning post, a transition plate, an upper seat body and an upper seat connecting plate. The upper thrust plate is limitedly connected to the transition plate through the positioning post. The transition plate is fixedly connected to the upper seat body, and the upper seat body is fixedly connected to the upper seat connecting plate.

7. A planar moving MSR ball bearing according to claim 6, characterized in that, The base mechanism includes a base body, an ear plate, an oil baffle ring and an adjusting assembly. The lower thrust plate is fixedly connected to the base body, the oil baffle ring is fixedly connected to the base body, the base body is fixedly connected to the ear plate, and the adjusting assembly is connected to the base body; The adjusting assembly includes a first adjusting member and a second adjusting member. The first adjusting member is in abutting connection with the outer wall of the upper thrust plate, and the second adjusting member is in abutting connection with the outer wall of the cage.

8. A planar moving MSR ball bearing according to claim 6, characterized in that, The upper seat mechanism further includes a protective cover, and the protective cover is fixedly connected to the transition plate.

9. A verification method for an MSR ball bearing performing planar movement, applicable to the MSR ball bearing performing planar movement described in any one of claims 1-8, characterized in that, Including the following steps: S1: Calculate the bearing capacity of the bearing, the sum of the plastic deformations of the spheres and the raceways: S2: Calculate the fatigue life of the bearing; S3: Calculate the horizontal displacement of (X, Y): S4: Calculate the coefficient of friction:

10. The MSR ball bearing for planar movement according to claim 9, characterized in that In step S2, it includes the following steps: A1: First, divide the MSR ball bearing into columns, and calculate the rated rolling element load of each column of bearing rings: A2: Calculate the rated dynamic load of the upper thrust disc and the lower thrust disc: A3: Calculate the rated dynamic load of the overall bearing: A4: Calculate the bearing fatigue life:

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