Hybrid structure bearing

Abstract

The utility model discloses a mixed structure bearing, including bearing main part, bearing main part includes bearing body no.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and more specifically, to a hybrid structure bearing. Background Technology

[0002] During the operation of steam turbines or gas turbines, factors such as steam force, thermal expansion, and misalignment can cause dynamic load changes and vibrations. Current bearings generally employ a "single" structure. This "single" structure cannot meet the requirements of large units, which demand both high-strength rigidity support and resistance to oil film whirl and oscillation. A "single" structure refers to using only a rigid bearing or only a tilting bearing. While a rigid bearing provides high-strength rigidity support, its resistance to oil film whirl and oscillation is poor. A tilting bearing provides stronger resistance to oil film whirl and oscillation but has lower rigidity and requires improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hybrid structure bearing that has rigidity while also being able to resist oil film whirl and oil film oscillation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a hybrid structure bearing, comprising a bearing body, the bearing body comprising a bearing housing one, the inner wall of the bearing housing one being coated with a coating one in the shape of an arc; a bearing housing two is mounted on the bearing housing one, the bearing housing two being mounted with a spherical pin, the spherical pin being inserted into the inner wall of the bearing housing two, the side of the spherical pin inserted into the bearing housing two being spherical, the spherical pin being rotatable, a bearing pad being fixedly mounted on the spherical pin, the bearing pad being coated with a coating two in the shape of an arc, the coating two being concentric with the coating.

[0005] The present invention is further configured such that the coating is semi-circular, and two tiles are symmetrically arranged and distributed circumferentially along the inner wall of the bearing body.

[0006] The present invention is further configured such that a spherical pin is fixedly installed with a bearing support, the bearing support is fixedly installed with a bearing, and the bearing support extends circumferentially along the inner wall of the bearing body in the length direction; a limit block is installed on the bearing body, the limit block is located at both ends of the bearing support in the length direction, so that the limit block can limit the rotation range of the bearing support.

[0007] The present invention is further configured such that a heat dissipation groove is provided on the side of the bearing block away from the center of the bearing body, and the heat dissipation groove is connected to the inner cavity of the bearing body.

[0008] The present invention is further configured such that the coating is provided with a perforated groove, which is arc-shaped and located between the two ends of the arc shape of the coating.

[0009] The present invention is further configured such that the coating one is also provided with a perforated groove two, the perforated groove two being arc-shaped, and the radius of the perforated groove two being smaller than the radius of the perforated groove one.

[0010] The present invention is further configured such that the coating one is provided with a perforated groove three, the perforated groove three being arc-shaped, and the radius of the perforated groove three being larger than the radius of the perforated groove two.

[0011] The present invention is further configured such that the coating has a wall surface, the wall surface is an arc surface, and the wall surface is located at the minimum inner diameter of the coating.

[0012] The present invention is further configured such that a flow channel hole is provided on the bearing body, one end of the flow channel hole is connected to the through groove, and a hole plug is installed on the other end of the flow channel hole.

[0013] In summary, this utility model has the following beneficial effects:

[0014] By configuring bearing housing one and bearing housing two, bearing housing one possesses the characteristics of a rigid bearing and is equipped with a perforated groove to form an oil wedge. Oil is drawn into the wedge-shaped gap, and as the gap gradually decreases along the rotation direction, the oil is compressed to form a pressure oil film, thereby balancing external loads, reducing friction, and improving the bearing's load-bearing capacity. Bearing housing two is equipped with a tilting pad structure, which achieves dynamic balance during shaft operation by shifting the position of the pads, providing strong resistance to oil film whirl and oil film oscillation. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of an embodiment;

[0016] Reference numerals in the attached drawings: bearing body 1, bearing body one 11, coating one 111, through groove one 1111, through groove two 1112, through groove three 1113, wall surface 1114, flow channel hole 112, bearing body two 12, hole plug 2, spherical pin 3, gasket 31, bearing support 4, bearing 5, heat dissipation groove 51, coating two 52, limiting block 6, flow channel 7, oil injection port 71, oil inlet 72, oil discharge groove 8. Detailed Implementation

[0017] 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.

[0018] like Figure 1As shown, this embodiment discloses a hybrid structure bearing, including a bearing body 1, which includes a bearing body 11 and a bearing body 2 12 mounted on the bearing body 11. The bearing body 11 and the bearing body 2 12 are spliced ​​together to form a ring structure for mounting a shaft, which passes through the bearing body 1.

[0019] The inner wall of the bearing body 11 is provided with a coating 111, which is a Babbitt alloy layer. The coating 111 is arc-shaped. More precisely, the coating 111 is semi-circular. The coating 111 has a through groove 1111, which is also arc-shaped and located between the two ends of the arc shape of the coating 111. The coating 111 has a wall surface 1114, which is an arc surface. The wall surface 1114 is located at the minimum inner diameter of the coating 111 and is located at the left end of the arc shape of the coating 111. The inner diameter of the wall surface 1114 matches the inner diameter of the bearing body. By setting the through groove 1111, an oil wedge is formed between the shaft and the coating 111 when the shaft rotates. (An oil wedge is a key structure of sliding bearings in mechanical engineering. It refers to the wedge-shaped space formed between the bearing and the journal. The dynamic flow of lubricating oil generates oil film pressure, which supports and lubricates the journal. Its core principle is based on the hydrodynamic effect: when the journal rotates, the oil is carried into the wedge-shaped gap. As the gap gradually decreases along the direction of rotation, the oil is squeezed to form a pressure oil film, thereby balancing the external load and reducing friction.) The oil wedge is also the gap between the shaft and the coating 111. When the gap becomes smaller, the oil pressure increases, thereby balancing the external load and reducing friction.

[0020] Coating 111 also includes two through grooves, 1112 and 1113. Through groove 1112 is arc-shaped, with a radius smaller than that of through groove 1111. Through groove 1113 is also arc-shaped, with a radius larger than that of through groove 1112. Through grooves 1111, 1112, and 1113 are continuously arranged circumferentially along the inner wall of coating 111, and are interconnected by arc transitions, creating wedge-shaped gaps of varying sizes between the inner wall of coating 111 and the shaft in the circumferential direction.

[0021] like Figure 1 As shown, the bearing body 11 is provided with a flow channel hole 112. One end of the flow channel hole 112 is connected to the through groove 1111, and the other end of the flow channel hole 112 is equipped with a hole plug 2. Opening the hole plug 2 can release the oil pressure and at the same time discharge the gas, thus playing the role of exhaust.

[0022] like Figure 1As shown, a spherical pin 3 is installed on the bearing body 2 12. The spherical pin 3 is inserted into the inner wall of the bearing body 2 12. The side of the spherical pin 3 inserted into the bearing body 2 12 is spherical so that the spherical pin 3 can rotate. There are two spherical pins 3 symmetrically arranged and distributed circumferentially along the inner wall of the bearing body 2 12.

[0023] A spherical pin 3 is fixedly mounted with a bearing support 4, and a gasket 31 is installed between the spherical pin 3 and the bearing support 4. Bearing blocks 5 are fixedly mounted on the bearing support 4, and the bearing support 4 extends circumferentially along the inner wall of the bearing body 12 in the length direction. Limiting blocks 6 are installed on the bearing body 1, located at both ends of the bearing support 4 in the length direction, so that the limiting blocks 6 can restrict the rotation range of the bearing support 4.

[0024] The bearing pad 5 and the spherical pin 3 are set in a one-to-one correspondence. The bearing pad 5 has a second coating 52 on the side facing the center of the bearing body 1. The second coating 52 is arc-shaped and concentric with the first coating 111. The shaft passes through the channel formed by the first coating 111 and the second coating 52.

[0025] The bearing pad 5 is provided with a heat dissipation groove 51 on the side away from the center of the bearing body 1. The heat dissipation groove 51 is connected to the inner cavity of the bearing body 12. Cooling oil flows into the heat dissipation groove 51 to quickly dissipate heat from the bearing pad 5, thereby improving the cooling capacity and overall operating performance.

[0026] The bearing body 1 includes a flow channel 7, which includes an oil injection port 71 and an oil inlet 72. The oil injection port 71 is connected to a permeable groove 1113, so that the flow channel 7 is connected to the inner cavity of the bearing body 1. The oil inlet 72 is an external oil inlet pipe. The bearing body 1 also includes an oil drain groove 8, which is connected to the inner cavity of the bearing body 1, so that the cooling oil in the inner cavity of the bearing body 1 can flow out from the oil drain groove 8.

[0027] 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 hybrid structure bearing, characterized in that, It includes a bearing body (1), the bearing body (1) includes a bearing body one (11), the inner wall of the bearing body one (11) is provided with a coating one (111), the coating one (111) is arc-shaped; The bearing body one (11) is equipped with a bearing body two (12), and the bearing body two (12) is equipped with a spherical pin (3). The spherical pin (3) is inserted into the inner wall of the bearing body two (12). The side of the spherical pin (3) inserted into the bearing body two (12) is spherical. The spherical pin (3) can rotate. The spherical pin (3) is fixedly installed with a tile (5). The tile (5) is provided with a coating two (52) on the side facing the center of the bearing body (1). The coating two (52) is arc-shaped and concentric with the coating one (111).

2. The hybrid structure bearing according to claim 1, characterized in that, The coating one (111) is semi-circular, and two tiles (5) are symmetrically arranged and distributed circumferentially along the inner wall of the bearing body two (12).

3. A hybrid structure bearing according to claim 1, characterized in that, The spherical pin (3) is fixedly installed with a tile support (4), the tile support (4) is fixedly installed with the tile (5), and the tile support (4) extends circumferentially along the inner wall of the bearing body (12) in the length direction; The bearing body (1) is equipped with a limiting block (6), which is located at both ends of the bearing support (4) along its length, so that the limiting block (6) can limit the rotation range of the bearing support (4).

4. A hybrid structure bearing according to claim 1, characterized in that, The tile (5) has a heat dissipation groove (51) on the side away from the center of the bearing body (1), and the heat dissipation groove (51) is connected to the inner cavity of the bearing body (12).

5. A hybrid structure bearing according to claim 1, characterized in that, The coating (111) is provided with a perforated groove (1111), which is arc-shaped and located between the two ends of the arc of the coating (111).

6. A hybrid structure bearing according to claim 5, characterized in that, The coating one (111) is also provided with a perforated groove two (1112), the perforated groove two (1112) is arc-shaped, and the radius of the perforated groove two (1112) is smaller than the radius of the perforated groove one (1111).

7. A hybrid structure bearing according to claim 6, characterized in that, The coating one (111) is also provided with a perforated groove three (1113), the perforated groove three (1113) is arc-shaped, and the radius of the perforated groove three (1113) is larger than the radius of the perforated groove two (1112).

8. A hybrid structure bearing according to claim 1, characterized in that, The coating one (111) has a wall surface (1114), which is an arc surface and is located at the minimum inner diameter of the coating one (111).

9. A hybrid structure bearing according to claim 5, characterized in that, The bearing body (11) is provided with a flow channel hole (112), one end of the flow channel hole (112) is connected to the through groove (1111), and a hole plug (2) is installed at the other end of the flow channel hole (112).

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