A self-aligning plain bearing

Abstract

The utility model discloses a self -aligning sliding bearing, including bearing seat, tile, adjusting seat, the inner wall of bearing seat is installed with fixed base, and adjusting seat inserts fixed base, and adjusting seat can rotate along the inner wall surface of fixed base, and tile is located the radial inboard of bearing seat, and tile is equipped with flat wall surface, and adjusting seat is equipped with outer wall surface no.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing technology, and more specifically, to a self-aligning sliding bearing. Background Technology

[0002] In conventional tilting pad bearing structures, although the pads can swing independently, they are mounted as a whole within a rigid bearing housing. This makes them sensitive to installation and alignment errors. During spindle operation, the pads are prone to misalignment, leading to uneven load distribution, stress concentration, increased vibration, and accelerated wear. Furthermore, because the distance between the spindle and the pads changes during spindle operation, the pads have weak adjustment capabilities and cannot promptly achieve concentricity with the spindle. This results in the oil film between the spindle and the pads not reaching an optimal wedge state, indicating a deficiency in the design. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-aligning sliding bearing to improve the spindle's operating performance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a self-aligning sliding bearing, comprising a bearing housing, a bearing pad, and an adjusting seat. A fixed seat is installed on the inner wall of the bearing housing, and the adjusting seat is inserted into the fixed seat. The adjusting seat can rotate along the inner wall surface of the fixed seat. The bearing pad is located on the radial inner side of the bearing housing and has a flat wall surface. The adjusting seat has an outer wall surface II. Both the flat wall surface and the outer wall surface II are planar and fit together.

[0005] The present invention is further configured such that a fixing component is installed on the bearing seat, the fixing component includes a limiting component, the bearing block has a channel, the limiting component is inserted into the channel, and the outer diameter of the limiting component is smaller than the inner diameter of the channel.

[0006] The present invention is further configured such that the bearing housing includes protrusions located at both ends in the axial direction, the bearing pad is located between the two protrusions, the protrusions are provided with extensions, the bearing pad is provided with grooves, and the extensions are inserted into the grooves.

[0007] The present invention is further configured such that, along the radial direction of the bearing housing, the length of the extension body is less than the length of the groove body.

[0008] The present invention is further configured such that the adjusting seat includes an outer wall surface, the outer wall surface being spherical, and the fixing seat having a groove, the outer wall surface being fitted to the wall surface of the groove.

[0009] The present invention is further configured such that the fixing seat has a second hole, and a fastener is installed on the fixing seat. The fastener is threadedly inserted into the second hole. The fastener includes a first rod portion that passes through the adjusting seat. The outer diameter of the first rod portion is smaller than the inner hole diameter of the adjusting seat through which the first rod portion passes.

[0010] The present invention is further configured such that the fastener includes a second rod portion, the adjusting seat is provided with a second countersunk hole, the second rod portion is located in the second countersunk hole, and the outer diameter of the second rod portion is larger than the inner hole diameter of the adjusting seat through which the first rod portion passes.

[0011] In summary, this utility model has the following beneficial effects:

[0012] The adjusting seat and the fixed seat have a self-aligning function. Since the adjusting seat is not fixed to the bearing, the two steps of tilting adjustment of the bearing and self-aligning of the adjusting seat are separated. The spherical pair between the adjusting seat and the fixed seat can compensate for the alignment deviation between the entire bearing and the spindle. The bearing automatically responds and adjusts quickly under the influence of the spindle and oil pressure to adjust the concentric position relationship between the bearing 3 and the spindle, so that the oil film forms the optimal oil wedge. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of an embodiment;

[0014] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 for Figure 1 A cross-sectional view along the MM direction;

[0016] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0017] Reference numerals: bearing housing 1, first bearing housing 11, second bearing housing 12, protrusion 13, extension 131, oil inlet 14, fixing part 2, limiting part 21, tile 3, channel one 31, flat wall surface 32, groove 33, fixing seat 4, groove 41, boss 42, channel two 421, adjusting seat 5, countersunk hole two 51, outer wall surface one 52, outer wall surface two 53, fastener 6, threaded part 61, first rod part 62, second rod part 63, through hole 64. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1-4As shown, this embodiment discloses a self-aligning sliding bearing, including a bearing housing 1, bearing blocks 3, and an adjusting seat 5. As shown, a fixing seat 4 is installed on the inner wall of the bearing housing 1. The inner wall of the bearing housing 1 has a countersunk hole that extends radially outward along the inner wall surface of the bearing housing 1. The bearing housing 1 has an oil inlet hole 14 that penetrates the outer wall of the bearing housing 1 and communicates with the countersunk hole. The fixing seat 4 is inserted into and fixed in the countersunk hole of the bearing housing 1. The fixing seat 4 includes a boss 42 that is inserted into the oil inlet hole 14. The boss 42 has a channel 421 that communicates with the oil inlet hole 14. The boss 42 also has a groove 41 that communicates with the channel 421. The groove 41 is located on the side of the fixing seat 4 near the center of the bearing housing 1, and the wall surface of the groove 41 is spherical.

[0020] The fixed seat 4 is equipped with an adjusting seat 5, which is inserted into the fixed seat 4 and can rotate along the inner wall surface of the fixed seat 4. Specifically, the adjusting seat 5 includes an outer wall surface 52 and an outer wall surface 53. The outer wall surface 52 is spherical and fits against the wall surface of the groove 41, allowing the adjusting seat 5 to rotate along the wall surface of the groove 41. The outer wall surface 53 is flat and is located on the side of the adjusting seat 5 closest to the center of the bearing seat 1. The fixed seat 4 is equipped with a fastener 6, which includes a threaded portion 61. The fastener 6 passes through the adjusting seat 5 and is inserted into the second hole 421, with the threaded portion 61 threadedly connected to the second hole 421. The fastener 6 also includes a first rod portion 62, which is located on the side of the threaded portion 61 near the center of the bearing housing 1. The first rod portion 62 passes through the adjusting seat 5, and its outer diameter is smaller than the inner diameter of the adjusting seat 5 through which the first rod portion 62 passes, so that the adjusting seat 5 can rotate slightly for automatic spindle self-alignment. The fastener 6 also includes a second rod portion 63, in which the adjusting seat 5 has a countersunk hole 51. The second rod portion 63 is located within the countersunk hole 51, and its outer diameter is larger than the inner diameter of the adjusting seat 5 through which the first rod portion 62 passes, to prevent the adjusting seat 5 from dislodging.

[0021] Fastener 6 is provided with an axially penetrating through hole 64, which connects the oil inlet hole 14 and the countersunk hole 51, so that the top shaft oil can enter the bearing housing 1 to perform positioning and lubrication functions. When the spindle starts, the top shaft oil will push the spindle upward to reduce friction during startup.

[0022] Combination Figure 1 , Figure 3 , Figure 4 The bearing pad 3 is located radially inside the bearing housing 1. Multiple bearing pads 3 are evenly distributed along the inner circumferential wall of the bearing housing 1. Each bearing pad 3 has a flat wall surface 32, which is planar and fits against the outer wall surface 53. For example... Figure 3 , Figure 4As shown, the bearing housing 1 includes protrusions 13 located at both axial ends, with bearing pads 3 positioned between the two protrusions 13. Each protrusion 13 has an extension 131, and each bearing pad 3 has a corresponding groove 33. The extension 131 is inserted into the groove 33, thus limiting the movement of the groove 33. Along the radial direction of the bearing housing 1, the length of the extension 131 is less than the length of the groove 33, allowing the bearing pads 3 to move for self-alignment. The inner sides of the multiple bearing pads 3 are used to mount the spindle. During spindle operation, an oil film layer formed between the bearing pads 3 and the spindle reduces friction. Automatic displacement adjustment of the bearing pads 3 prevents direct contact between the bearing pads 3 and the spindle, thus preventing increased resistance and vibration.

[0023] The flat wall surface 32 and the outer wall surface 53 are in planar contact, allowing the bearing pad 3 to be freely adjusted. The adjusting seat 5 and the fixed seat 4 have a self-aligning function. The adjusting seat 5 is not fixed to the bearing pad 3, thus separating the tilting adjustment of the bearing pad 3 from the self-aligning steps of the adjusting seat 5. The spherical pair between the adjusting seat 5 and the fixed seat 4 compensates for the alignment deviation between the entire bearing and the spindle, such as installation errors, shaft bending, and foundation deformation. This is a holistic, relatively slow, and wide-range adjustment. The bearing pad 3, under the influence of the spindle and hydraulic pressure, automatically responds and adjusts quickly to adjust the concentric position relationship between the bearing pad 3 and the spindle, so that the oil film forms the optimal oil wedge. If the bearing pad 3 is fixed to the adjusting seat 5, the adjustment of the bearing pad 3 will be sluggish, causing greater resistance to the spindle and even causing jamming and self-locking, which will increase wear.

[0024] like Figure 1 As shown, the bearing housing 1 includes a first bearing housing 11 and a second bearing housing 12. Both the first bearing housing 11 and the second bearing housing 12 are semi-circular. The first bearing housing 11 and the second bearing housing 12 are fixedly connected and spliced ​​to form the bearing housing 1. The splicing arrangement of the first bearing housing 11 and the second bearing housing 12 facilitates the installation of the tile 3.

[0025] like Figure 1 , Figure 2 As shown, a fixing member 2 is fixedly installed on the bearing housing 1. The fixing member 2 includes a limiting member 21. The bearing 3 is provided with a channel 31. The limiting member 21 is inserted into the channel 31. The outer diameter of the limiting member 21 is smaller than the inner diameter of the channel 31. While the limiting member 21 limits the bearing 3, the bearing 3 can move slightly to automatically adjust itself.

[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A self-aligning sliding bearing, characterized in that, The bearing includes a bearing housing (1), a bearing block (3), and an adjusting seat (5). A fixed seat (4) is installed on the inner wall of the bearing housing (1). The adjusting seat (5) is inserted into the fixed seat (4) and can rotate along the inner wall surface of the fixed seat (4). The bearing block (3) is located on the radial inner side of the bearing housing (1). The bearing block (3) has a flat wall surface (32). The adjusting seat (5) has an outer wall surface (53). Both the flat wall surface (32) and the outer wall surface (53) are planes. The flat wall surface (32) and the outer wall surface (53) are in contact.

2. The self-aligning sliding bearing according to claim 1, characterized in that, The bearing seat (1) is equipped with a fixing member (2), the fixing member (2) includes a limiting member (21), the tile (3) is provided with a channel (31), the limiting member (21) is inserted into the channel (31), and the outer diameter of the limiting member (21) is smaller than the inner diameter of the channel (31).

3. A self-aligning sliding bearing according to claim 1, characterized in that, The bearing housing (1) includes protrusions (13) located at both ends of the axial direction. The bearing block (3) is located between the two protrusions (13). The protrusions (13) are provided with extensions (131). The bearing block (3) is provided with grooves (33). The extensions (131) are inserted into the grooves (33).

4. A self-aligning sliding bearing according to claim 3, characterized in that, Along the radial direction of the bearing housing (1), the length of the extension (131) is less than the length of the groove (33).

5. A self-aligning sliding bearing according to claim 1, characterized in that, The adjusting seat (5) includes an outer wall surface (52), which is spherical. The fixing seat (4) is provided with a groove (41), and the outer wall surface (52) fits against the wall surface of the groove (41).

6. A self-aligning sliding bearing according to claim 1, characterized in that, The fixing seat (4) is provided with a second channel (421). The fixing seat (4) is equipped with a fastener (6). The fastener (6) is threadedly inserted into the second channel (421). The fastener (6) includes a first rod (62). The first rod (62) passes through the adjusting seat (5). The outer diameter of the first rod (62) is smaller than the inner diameter of the adjusting seat (5) through which the first rod (62) passes.

7. A self-aligning sliding bearing according to claim 6, characterized in that, The fastener (6) includes a second rod (63), the adjusting seat (5) is provided with a countersunk hole (51), the second rod (63) is located in the countersunk hole (51), and the outer diameter of the second rod (63) is larger than the inner diameter of the adjusting seat (5) through which the first rod (62) passes.

8. A self-aligning sliding bearing according to claim 7, characterized in that, The bearing housing (1) is provided with an oil inlet hole (14), which is connected to the countersunk hole (51).

9. A self-aligning sliding bearing according to claim 1, characterized in that, The bearing housing (1) includes a first bearing housing (11) and a second bearing housing (12), and the first bearing housing (11) and the second bearing housing (12) are fixedly connected.

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