A large segmented thrust bearing

Abstract

The utility model relates to bearing technical field, concretely is a kind of large sectional thrust bearing, upper ball sleeve ring subassembly includes four circular arc upper ball sleeve ring sections of butt joint, the circular arc upper ball sleeve ring section is provided with upper raceway groove, at least one the circular arc upper ball sleeve ring section is provided with ball replacement groove;Lower ball sleeve ring subassembly includes three circular arc lower ball sleeve ring sections of butt joint, the circular arc lower ball sleeve ring section is provided with lower raceway groove;Rolling element and spacer block are mutually inserted and loaded between the upper raceway groove and the lower raceway groove;Ball replacement window blocking plate is at least partially placed in the ball replacement groove, the ball replacement window blocking plate is equipped with raceway camber, and gap is equipped between the raceway camber and the rolling element.The utility model is composed of multiple independent bearing sections, sets up ball replacement groove while setting up ball replacement window blocking plate, and it is convenient to install, maintain and replace.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically a large segmented thrust bearing. Background Technology

[0002] Thrust bearings are mechanical components specifically designed to withstand axial loads and are widely used in rotating equipment such as stacker-reclaimers, turbines, generators, and marine propulsion systems. Currently, most thrust bearings on the market are integral structures, with segmented thrust bearings being relatively less common. Utility Model Content

[0003] In view of the deficiencies of the prior art, this utility model provides a large segmented thrust bearing and its installation method, which is composed of multiple independent bearing segments, and is provided with ball changing grooves and ball changing window blocking plates to facilitate installation, maintenance and replacement.

[0004] To achieve the above objectives, the present invention provides a large segmented thrust bearing, comprising an upper ball bearing assembly, a lower ball bearing assembly, rolling elements, a spacer block, and a ball-changing window blocking plate. The upper ball bearing assembly includes four arc-shaped upper ball bearing segments connected end-to-end, each arc-shaped upper ball bearing segment having an upper raceway groove, and at least one of the arc-shaped upper ball bearing segments having a ball-changing groove. The lower ball bearing assembly includes three arc-shaped lower ball bearing segments connected end-to-end, each arc-shaped lower ball bearing segment having a lower raceway groove. The rolling elements and spacer block are interlocked between the upper raceway groove and the lower raceway groove. The ball-changing window blocking plate is at least partially placed inside the ball-changing groove, and the ball-changing window blocking plate has a raceway arc surface, with a gap between the raceway arc surface and the rolling elements.

[0005] Furthermore, two of the four arc-shaped upper ball ring segments are provided with ball-changing grooves.

[0006] Furthermore, the two ball-changing grooves are spaced 180 degrees apart along the circumferential direction.

[0007] Furthermore, the distance between the sidewall of the ball-changing window blocking plate and the sidewall of the ball-changing groove it faces is 0.3mm-0.5mm.

[0008] Furthermore, the gap is 0.5mm-1mm.

[0009] Furthermore, the ball-changing window blocking plate is provided with an oil injection hole, the inlet end of which is located on the end face of the ball-changing window blocking plate that is radially away from the rolling element, and the outlet end of which is located on the raceway arc surface.

[0010] Furthermore, the oil injection hole includes a straight segment arranged radially and an oblique segment that slopes from the straight segment toward the raceway arc surface.

[0011] Furthermore, both ends of the upper and lower spherical ring segments of the arc are provided with bevels.

[0012] Furthermore, the large segmented thrust bearing also includes a lower support plate and an upper pressure plate. The upper end face of the lower support plate has two lower annular stops. One lower annular stop is used to press against the inner diameter of the lower arc ball bearing segment, and the other lower annular stop is used to press against the outer diameter of the lower arc ball bearing segment. The lower end face of the upper pressure plate has two upper annular stops. One upper annular stop is used to press against the inner diameter of the upper arc ball bearing segment, and the other upper annular stop is used to press against the outer diameter of the upper arc ball bearing segment.

[0013] A method for installing a large segmented thrust bearing, characterized by the following specific steps: S100. The lower arc ball collar segment is transported to the lower support plate, and the inner diameter and outer diameter of the lower arc ball collar segment are respectively close to the two lower annular stops. S200. Apply grease to the lower raceway groove of the lower arc ball ring section, and place the isolation block and rolling element. S300, transport the arc-shaped upper ball ring segment to the upper part of the isolation block and the rolling element; S400. Place the upper pressure plate on the upper part of the arc-shaped upper ball collar section, with the inner diameter and outer diameter of the arc-shaped upper ball collar section respectively close to the two upper annular stops, adjust the position of the upper ball collar assembly, and fix it by the upper pressure plate. S500, Place the ball-changing window blocking plate inside the ball-changing groove.

[0014] The beneficial effects of this utility model are: it consists of multiple independent bearing sections, and is equipped with a ball-changing groove and a ball-changing window blocking plate, which facilitates installation, maintenance and replacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a large segmented thrust bearing in one embodiment of the present invention; Figure 2 This is a schematic diagram of the upper ball collar assembly in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the lower ball collar assembly in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the ball-changing window blocking plate in one embodiment of the present invention; Figure 5 This is a top view of the ball-changing window blocking plate in one embodiment of the present invention; Figure 6 for Figure 2 Cross-sectional view of AA in the middle; Figure 7 This is a schematic diagram of the structure of a large segmented thrust bearing in another embodiment of the present invention; Figure 8 A schematic diagram of the structure in which the isolation block and the rolling element are interwoven; In the picture: 100. Upper ball bearing assembly; 110. Arc-shaped upper ball bearing section; 111. Upper raceway groove; 112. Ball changing groove; 1121. Side wall; 120. Upper pressure plate; 121, 122. Upper annular stop. 200. Lower ball bearing assembly; 210. Arc-shaped lower ball bearing section; 211. Lower raceway groove; 220. Lower support plate; 221, 222. Lower annular stop. 300, isolation block, 400. Rolling element, 500. Ball changing window blocking plate; 510. First end face; 520. Oil injection hole; 521. Inlet end; 522. Outlet end; 523. Straight section; 524. Angled section; 530. Second end face; 540. Raceway arc surface; 550. Mounting hole. 600, gap, 700. Distance between the sidewall of the ball-changing window blocking plate and the sidewall of the ball-changing groove it faces. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] See Figures 1-3 A schematic diagram of a large segmented thrust bearing is shown, which is suitable for large segmented thrust bearings with a rotation center diameter of 2000mm-12000mm. In this embodiment, the rotation center diameter of the large segmented thrust bearing is 3100mm, and it includes an upper ball bearing assembly 100, a lower ball bearing assembly 200, a spacer block 300, rolling elements 400, and a ball changing window blocking plate 500. In this embodiment, the upper ball bearing assembly 100, the lower ball bearing assembly 200, and the ball changing window blocking plate 500 are made of spring steel 51CrV4.

[0018] See Figure 1 and Figure 2The upper ball bearing assembly 100 includes four arc-shaped upper ball bearing segments 110 connected end to end. Each arc-shaped upper ball bearing segment 110 has an upper raceway groove 111, and at least one arc-shaped upper ball bearing segment 110 has a ball-changing groove 112. In one embodiment, two of the four arc-shaped upper ball bearing segments 110 have ball-changing grooves 112.

[0019] See Figure 1 and Figure 3 The lower ball bearing assembly 200 includes three arc-shaped lower ball bearing segments 210 connected end-to-end, each arc-shaped lower ball bearing segment 210 having a lower raceway groove 211; a spacer block 300 is disposed between the upper ball bearing assembly 100 and the lower ball bearing assembly 200. (See also...) Figure 6 and Figure 8 The rolling element 400 and the spacer block 300 are interlocked and inserted between the upper raceway groove 111 and the lower raceway groove 211. Specifically, interlocking means that... Figure 8 The spacing shown is consistent with the arrangement shown in the figure. Figure 1 and Figure 8 As shown, at least part of the ball-changing window blocking plate 500 is placed inside the ball-changing groove 112. The ball-changing window blocking plate 500 is provided with a raceway arc surface 540, and a gap 600 is provided between the raceway arc surface 540 and the rolling element 400.

[0020] The aforementioned large segmented thrust bearing includes an upper ball bearing assembly 100 and a lower ball bearing assembly 200. The upper ball bearing assembly 100 includes four arc-shaped upper ball bearing segments 110, and the lower ball bearing assembly 200 includes three arc-shaped lower ball bearing segments 210. This design facilitates transportation and storage for bearings with large rotational center diameters. The independent arc-shaped upper ball bearing segments 110 are of consistent size and shape and can be installed in a fixed sequence, making installation more convenient. The same applies to the arc-shaped lower ball bearing segments 210. Furthermore, appropriate isolation blocks 300 and rolling elements 400 are provided to ensure bearing operational accuracy while improving bearing load-bearing capacity and operational stability. Additionally, a ball-changing groove 112 and a ball-changing window blocking plate 500 are provided for easy installation, maintenance, and replacement.

[0021] like Figure 2 As shown, in one embodiment, the two ball-changing grooves 112 are arranged 180 degrees apart along the circumferential direction. It should be noted that the number of ball-changing grooves 112 can be adaptively set according to the diameter of the bearing.

[0022] See Figure 8In one embodiment, the distance 700 between the sidewall of the ball-changing window blocking plate 500 and the sidewall 1121 of the ball-changing groove 112 it faces is 0.3mm-0.5mm. The ball-changing window blocking plate 500 is used to observe the internal operating status of the bearing and to replace the isolation block 300, rolling elements 400, and grease. This arrangement facilitates the removal or insertion of the ball-changing window blocking plate 500 from the ball-changing groove 112. Considering the on-site construction environment and conditions, easy installation and disassembly are essential. A clearance of 0.3mm-0.5mm is suitable for use. Too large a clearance may cause rolling abnormalities, foreign objects to enter, or large radial oscillations; too small a clearance will result in a low fault tolerance rate and installation difficulties.

[0023] Specifically, see comparison. Figure 1 and Figure 8 In one embodiment, the gap 600 is 0.5mm-1mm. A gap 600, limited to 0.5mm-1mm, is provided between the raceway arc surface 540 and the rolling element 400. This gap can, to some extent, prevent abnormalities during the movement of the rolling element 400. The ball-changing window blocking plate 500 has gaps in both the radial and axial directions. It is not a separate component from the upper ball ring assembly 100, and its position is manually adjusted during installation. Therefore, it cannot precisely guarantee that the raceway positions of the upper ball ring assembly 100 and the ball-changing window blocking plate 500 are aligned. Abnormalities are likely to occur when the rolling element 400 moves from the raceway below the upper ball ring assembly 100 to the raceway below the ball-changing window blocking plate 500. Therefore, unloading is necessary. This gap prevents direct contact between the raceway arc surface 540 and the rolling element 400. The raceway arc surface 540 of the ball-changing window blocking plate 500 serves a guiding function and is not entirely used as a raceway, thus preventing it from being crushed.

[0024] like Figure 1 , Figure 4 and Figure 5 As shown, in one embodiment, the ball changing window blocking plate 500 is provided with an oil injection hole 520. The inlet end 521 of the oil injection hole 520 is located on the second end face 530 of the ball changing window blocking plate 500 that is radially away from the rolling element 400, and the outlet end 522 of the oil injection hole 520 is located on the raceway arc surface 510.

[0025] In one embodiment, the oil injection hole 520 includes a straight segment 523 arranged radially and an inclined segment 524 that is inclined from the straight segment 523 toward the raceway arc surface 510.

[0026] An oil injection hole 520 is provided on the ball changing window blocking plate 500 of the above-mentioned large segmented thrust bearing so that lubricating oil can be injected into the bearing through the oil injection hole 520 during bearing operation. The oil injection position is set at the ball changing window to ensure that the rolling elements 400 installed in the raceway are fully lubricated.

[0027] In one embodiment, both ends of the upper spherical collar section 110 and the lower spherical collar section 210 are provided with bevels. Specifically, in one embodiment, the bevel depth is 3mm.

[0028] Further, see Figure 7 The large segmented thrust bearing also includes a lower support plate 220 and an upper pressure plate 120. The upper end face of the lower support plate 220 has two lower annular stops 221 and 222. One lower annular stop 221 is used to press against the inner diameter of the arc-shaped lower ball bearing segment 210, and the other lower annular stop 222 is used to press against the outer diameter of the arc-shaped lower ball bearing segment 210. The two lower annular stops 221 and 222 are fitted with the inner and outer diameters of the lower ball bearing assembly 200 to restrict the bearing from moving in the axial direction and to tighten the bearing. The lower end face of the upper pressure plate 120 has two upper annular stops 121 and 122. One upper annular stop 121 is used for the inner diameter of the arc-shaped upper ball bearing segment 110, and the other upper annular stop 122 is used to press against the outer diameter of the arc-shaped upper ball bearing segment 110. The two upper annular stops 121 and 122 fit with the inner and outer diameters of the upper ball bearing assembly 100, restricting the axial movement of the bearing and tightening the bearing. The above-mentioned large segmented thrust bearing restricts the axial movement of the upper ball bearing assembly 100 and the lower ball bearing assembly 200 through the upper pressure plate 120 and the lower support plate 220, respectively, and tightens the bearing to improve the stability of bearing operation.

[0029] See also Figure 7 The installation method for large segmented thrust bearings includes the following specific steps: Step S100: Transport the lower arc ball bearing segment 210 to the lower support plate 220. The inner diameter and outer diameter of the lower arc ball bearing segment 210 are respectively close to the two lower annular stops 221 and 222. The two lower annular stops 221 and 222 are in fit with the inner and outer diameters of the lower ball bearing assembly 200, restricting the bearing from moving in the axial direction and tightening the bearing.

[0030] Step S200: Apply grease to the lower raceway groove 211 of the lower arc ball ring section 210, and place the isolation block 300 and the rolling element 400. Step S300: Transport the arc-shaped upper ball ring segment 110 to the upper part of the isolation block 300 and the rolling element 400; Step S400: Place the upper pressure plate 120 on the upper part of the arc-shaped upper ball bearing section 110. The inner diameter and outer diameter of the arc-shaped upper ball bearing section 110 are respectively close to the two upper annular stops 121 and 122. The two upper annular stops 121 and 122 are in fit with the inner and outer diameters of the upper ball bearing assembly 100, restricting the bearing from moving in the axial direction and tightening the bearing. Adjust the position of the upper ball bearing assembly and fix it by the upper pressure plate 120.

[0031] Step S500: Place the ball-changing window blocking plate 500 inside the ball-changing groove 112, with the raceway facing downwards and the oil injection hole 520 facing outwards. Further, step S500 may also include detachably connecting the ball-changing window blocking plate 500 to the upper pressure plate 120 with bolts. The specific connection method is a conventional setup in the art. In this embodiment, an installation hole 550 is provided on the ball-changing window blocking plate 500.

[0032] It should be noted that the specific structure of the upper pressure plate 120 and the lower support plate 220 can be reasonably set according to needs. Only two upper annular stops 121 and 122 and two lower annular stops 221 and 222 are required to meet the requirements. The upper pressure plate 120 and the lower support plate 220 are prepared at the bearing installation site and do not require long-distance transportation. Bearing components such as the upper ball bearing assembly 100 and the lower ball bearing assembly 200 are prepared and transported to the site for on-site assembly with the upper pressure plate 120 and the lower support plate 220.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A large segmented thrust bearing, characterized in that: include The upper ball ring assembly includes four arc-shaped upper ball ring segments connected end to end, each arc-shaped upper ball ring segment having an upper raceway groove, and at least one of the arc-shaped upper ball ring segments having a ball-changing groove. The lower ball bearing assembly includes three arc-shaped lower ball bearing segments connected end to end, and each arc-shaped lower ball bearing segment has a lower raceway groove. The rolling elements and the spacer blocks are interlocked and inserted between the upper raceway groove and the lower raceway groove; The ball-changing window blocking plate is at least partially placed inside the ball-changing groove. The ball-changing window blocking plate has a raceway arc surface, and there is a gap between the raceway arc surface and the rolling element.

2. A large segmented thrust bearing according to claim 1, characterized in that: Two of the four arc-shaped upper ball loop segments have ball-changing grooves.

3. A large segmented thrust bearing according to claim 1, characterized in that: The distance between the sidewall of the ball-changing window blocking plate and the sidewall of the ball-changing groove it faces is 0.3mm-0.5mm.

4. A large segmented thrust bearing according to claim 1, characterized in that: The gap is 0.5mm-1mm.

5. A large segmented thrust bearing according to claim 1, characterized in that: The ball-changing window blocking plate is provided with an oil injection hole. The inlet end of the oil injection hole is located on the end face of the ball-changing window blocking plate that is radially away from the rolling element, and the outlet end of the oil injection hole is located on the raceway arc surface.

6. A large segmented thrust bearing according to claim 5, characterized in that: The oil injection hole includes a straight section arranged radially and an oblique section that slopes from the straight section toward the raceway arc surface.

7. A large segmented thrust bearing according to claim 1, characterized in that: Both ends of the upper and lower circular arc ball-ring sections are provided with bevels.

8. A large segmented thrust bearing according to any one of claims 1-7, characterized in that: The large segmented thrust bearing also includes a lower support plate and an upper pressure plate. The upper end face of the lower support plate has two lower annular stops. One lower annular stop is used to press against the inner diameter of the lower arc ball bearing segment, and the other lower annular stop is used to press against the outer diameter of the lower arc ball bearing segment. The lower end face of the upper pressure plate has two upper annular stops. One upper annular stop is used to press against the inner diameter of the upper arc ball bearing segment, and the other upper annular stop is used to press against the outer diameter of the upper arc ball bearing segment.

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