Wear-resistant graphite bearing

Abstract

The wear-resistant graphite bearing comprises a multi-petal bearing bush, a graphite bushing and a bearing seat, the graphite bushing is arranged in the multi-petal bearing bush, a middle wear-resistant part of an arc-shaped structure is arranged in the middle of the graphite bushing, an embedding groove is formed in the inner side wall of the multi-petal bearing bush and corresponds to the graphite bushing, and the bearing seat is arranged in the middle wear-resistant part of the arc-shaped structure. An inserting groove is formed in the middle of the embedding groove and corresponds to the middle wear-resistant part; the middle wear-resistant part comprises graphite convex rings and a silicon carbide arc-shaped bulge, a plurality of graphite convex rings with the diameters gradually reduced are sequentially arranged on the two sides of the silicon carbide arc-shaped bulge from inside to outside respectively, the adjacent graphite convex rings are arranged at intervals, and the graphite convex rings and the silicon carbide arc-shaped bulge are arranged at intervals respectively, so that heat dissipation channels are formed; and the silicon carbide arc-shaped bulge is elastically connected with the middle part of the graphite bushing. According to the utility model, the contact between the bearing bush and the shaft neck and the wear resistance of the bearing seat are improved through the graphite bushing, the connection reliability of the graphite bushing and the multi-petal bearing bush is improved, the fault tolerance of the structure is improved through the arrangement of the layered middle wear-resistant part, and the bearing seat has better practicability.

Description

Technical Field

[0001] This utility model belongs to the technical field of sliding bearings, and specifically relates to a wear-resistant graphite bearing. Background Technology

[0002] Graphite bearings are sliding bearings made of graphite material. Sliding bearings are further divided into radial bearings and thrust bearings. Graphite sliding bearings are used in high and low temperature, high and low speed sliding conditions, and are resistant to corrosion from highly corrosive gases and liquids. The high performance of graphite bearings makes them widely used. Some graphite bearings need to be used in high-temperature environments, requiring not only wear resistance but also heat dissipation.

[0003] Silicon carbide is a ceramic material with high hardness, high wear resistance, high temperature resistance, and corrosion resistance, making it an important material for manufacturing high-tech products such as high-speed train power units and ion implantation equipment. Silicon carbide has a higher hardness and better wear resistance than graphite. It exhibits better durability under complex environments such as high temperature, high pressure, strong chemical corrosion, and friction. Graphite, on the other hand, is a layered material with carbon atoms arranged in a planar hexagonal pattern. The layers are only interacted by weak van der Waals forces, resulting in better self-lubricating properties.

[0004] Existing technologies disclose the use of silicon carbide and graphite materials in synergy to improve wear resistance. For example, patent CN202579282U discloses a magnetic pump spindle sliding bearing, which is mounted on the pump cover sliding bearing seat and consists of a graphite sliding bearing and a silicon carbide sliding bearing arranged side by side to form a composite sliding bearing. This utilizes the impact resistance of graphite and the wear resistance of silicon carbide, thereby improving the impact resistance and service life of the entire sliding bearing, and particularly enhancing its safety and reliability. However, the graphite and silicon carbide sliding bearings are independently installed, making it difficult to achieve optimal synergy. A failure in either bearing will render the entire bearing unusable.

[0005] Existing patent CN219570617U discloses a graphite bearing in which a silicon carbide ring is disposed between a graphite bushing and a bearing housing. The silicon carbide ring 4 is composed of several arc-shaped silicon carbide plates spliced ​​together. Each silicon carbide plate is provided with an elastic element between it and the graphite bushing or bearing shell, which improves the defects in CN202579282U. However, the graphite bushing and bearing shell are bonded with a high-temperature resistant adhesive, which is easy to be damaged. Moreover, the block structure of the silicon carbide plate and the graphite bushing is not easy to dissipate heat, and once broken, it needs to be replaced immediately as a whole, resulting in poor fault tolerance. Utility Model Content

[0006] The purpose of this invention is to provide a wear-resistant graphite bearing, which aims to solve the problem of poor structural reliability between graphite bushings and bearing shells in the prior art.

[0007] This invention improves the wear resistance of the bearing bush and journal contact or bearing housing by using a graphite bushing, as well as the connection reliability between the graphite bushing and the multi-lobed bearing bush. The graphite convex ring and silicon carbide arc-shaped protrusion enhance the wear resistance of the bearing itself, and the formed heat dissipation channel strengthens the high-temperature stability of the bearing, making it highly practical. Furthermore, the layered central wear-resistant section improves the structural resolution and fault tolerance.

[0008] The materials used to prepare the various components in this invention are the same as those in existing technologies, such as CN202579282U, and therefore will not be described again. The graphite material involved in this invention is not limited to graphite itself, but is a composite material. For example, commercially available composites are made by embedding graphite material into a metal matrix, and commercially available composites are made by mixing graphite material with metal powder, such as existing commercially available copper-graphite bearings.

[0009] This utility model is mainly achieved through the following technical solutions:

[0010] A wear-resistant graphite bearing includes a multi-lobed bearing shell, a graphite bushing, and a bearing housing, with a gap between the bearing housing and the multi-lobed bearing shell. The graphite bushing is disposed inside the multi-lobed bearing shell, and the middle of the graphite bushing has an arc-shaped wear-resistant portion that passes through the multi-lobed bearing shell and contacts the bearing housing. The inner side of the bearing housing has an arc-shaped groove along its circumference corresponding to the central wear-resistant portion. The inner sidewall of the multi-lobed bearing shell has an embedding groove corresponding to the graphite bushing, and the middle of the embedding groove has an insertion groove corresponding to the central wear-resistant portion.

[0011] The wear-resistant central section includes graphite raised rings and silicon carbide arc-shaped protrusions. Several graphite raised rings with gradually decreasing diameters are arranged sequentially from the inside to the outside on both sides of the silicon carbide arc-shaped protrusions. Adjacent graphite raised rings and graphite raised rings and silicon carbide arc-shaped protrusions are spaced apart to form heat dissipation channels. The silicon carbide arc-shaped protrusions are elastically connected to the central part of the graphite bushing.

[0012] To better realize this utility model, further, a number of silicon carbide arc-shaped protrusions are elastically provided along the circumference of the middle part of the outer side of the graphite bushing.

[0013] To better realize this utility model, further, a plurality of mounting grooves are provided along the circumference of the middle part of the outer side of the graphite bushing, one end of the silicon carbide arc-shaped protrusion is slidably connected to the mounting groove, and a plurality of springs are provided between the silicon carbide arc-shaped protrusion and the mounting groove.

[0014] To better realize this utility model, a graphite convex ring is further provided between the silicon carbide arc-shaped protrusion and the graphite bushing, and a plurality of silicon carbide arc-shaped protrusions are elastically provided on the outer side of the graphite convex ring along the circumferential direction.

[0015] To better realize this utility model, further, a number of sliding grooves are provided circumferentially on the outer side of the graphite convex ring in the middle of the graphite bushing, one end of the silicon carbide arc-shaped protrusion is slidably connected to the sliding groove, and a number of springs are provided between the silicon carbide arc-shaped protrusion and the sliding groove.

[0016] To better realize this utility model, the graphite bushing and the graphite convex ring are integrally formed.

[0017] To better realize this utility model, the graphite bushing is further provided as a multi-lobed structure, and the graphite bushing is interference-fitted with the graphite convex ring.

[0018] The beneficial effects of this utility model are as follows:

[0019] (1) This utility model improves the wear resistance of the bearing bush and journal by using a graphite bushing, and also improves the connection reliability between the graphite bushing and the multi-lobed bearing bush. The wear-resistant part in the middle of the graphite bushing enhances the wear resistance of the bearing itself. This utility model further improves the wear resistance of the bearing by using a graphite convex ring and a silicon carbide arc-shaped protrusion. In the event of an impact, the spring provides buffering and avoidance, and the graphite protrusion alleviates the impact force. It effectively combines the advantages of graphite and silicon carbide, and the heat dissipation channel formed enhances the high-temperature stability of the bearing. It has good practicality.

[0020] (2) This utility model provides several silicon carbide arc-shaped protrusions on the outer side of the graphite convex ring in the middle. By setting a layered middle wear-resistant part, the resolution of the structure is improved and the fault tolerance is improved. At the same time, it is convenient for later maintenance and has good practicality.

[0021] (3) In this utility model, the silicon carbide arc-shaped protrusion in the middle contacts the arc-shaped groove to receive force, and the wear resistance of the silicon carbide arc-shaped protrusion is better than that of the graphite protrusion. When encountering an impact, the spring buffers the force on the silicon carbide arc-shaped protrusion and avoids the impact, while the graphite protrusion alleviates the impact force. This utility model effectively combines the advantages of graphite and silicon carbide and has good practicality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection structure of the wear-resistant graphite bearing of this utility model.

[0023] Figure 2 A schematic diagram of the structure of the silicon carbide arc-shaped protrusion and the graphite ring on the graphite bushing;

[0024] Figure 3 A schematic diagram of the mounting groove on the graphite bushing;

[0025] Figure 4 A schematic diagram of the graphite convex ring on the graphite bushing;

[0026] Figure 5 This is a schematic diagram of the connection structure between the graphite convex ring in the middle of the graphite bushing and the silicon carbide arc-shaped protrusion.

[0027] Among them: 1-multi-lobed bearing, 2-graphite bushing, 3-bearing housing, 4-graphite convex ring, 5-silicon carbide arc-shaped protrusion, 6-mounting groove. Detailed Implementation

[0028] Example 1:

[0029] A wear-resistant graphite bearing includes a multi-lobed bearing shell 1, a graphite bushing 2, and a bearing housing 3, such as Figure 4 As shown, the graphite bushing 2 has several graphite convex rings 4 with gradually changing diameters arranged around its outer center. The inner wall of the multi-lobed bearing 1 has an embedding groove corresponding to the graphite bushing 2, and the embedding groove has a insertion groove corresponding to the several graphite convex rings 4. The inner arm of the bearing seat 3 has an arc-shaped groove along its circumference corresponding to the graphite convex rings 4. There is a gap between the bearing seat 3 and the multi-lobed bearing 1. The inner wall of the graphite bushing 2 is flush with the inner wall of the adjacent multi-lobed bearing 1.

[0030] Preferably, such as Figure 5 As shown, the graphite convex ring 4 in the middle of the graphite bushing 2 has several silicon carbide arc-shaped protrusions 5 elastically arranged circumferentially on the outer side. Further, the graphite convex ring 4 in the middle of the graphite bushing 2 has several sliding grooves circumferentially formed on the outer side, one end of each silicon carbide arc-shaped protrusion 5 is slidably connected to a sliding groove, and several springs are arranged between the silicon carbide arc-shaped protrusion 5 and the sliding groove.

[0031] Preferably, the graphite bushing 2 and the graphite convex ring 4 are integrally formed. Alternatively, the graphite bushing 2 has a multi-lobed structure, and the graphite bushing 2 and the graphite convex ring 4 are interference-fitted, facilitating future replacement and maintenance.

[0032] In use, this invention first assembles the graphite bushing 2, graphite convex ring 4, and silicon carbide arc-shaped protrusions 5. Then, it initially positions several segments of the multi-lobed bearing 1. Next, the graphite bushing 2 is aligned with the embedding groove and arc-shaped groove and placed into the multi-lobed bearing 1. The remaining segments of the multi-lobed bearing 1 are then assembled sequentially, and finally, the bearing housing 3 is installed. This invention improves the wear resistance of the bearing and journal contact through the graphite bushing 2 and enhances the connection reliability between the graphite bushing 2 and the multi-lobed bearing 1. The graphite convex ring 4 and silicon carbide arc-shaped protrusions 5 improve the wear resistance of the bearing itself, making it highly practical. Furthermore, the invention provides several silicon carbide arc-shaped protrusions 5 on the outer side of the central graphite convex ring 4, further improving the bearing's wear resistance. During impact, the spring provides buffering and avoidance, while the graphite protrusions alleviate the impact force, effectively combining the advantages of graphite and silicon carbide, thus demonstrating its practicality.

[0033] Example 2:

[0034] A type of wear-resistant graphite bearing, such as Figure 1 and Figure 2 As shown, the bearing includes a multi-lobed bearing shell 1, a graphite bushing 2, and a bearing seat 3. The outer wall of the graphite bushing 2 has a silicon carbide arc-shaped protrusion 5 elastically provided in the middle, and graphite convex rings 4 with gradually decreasing diameters are arranged sequentially from the middle to both sides, forming a heat dissipation channel between adjacent graphite convex rings 4. The inner wall of the multi-lobed bearing shell 1 has an embedding groove corresponding to the graphite bushing 2, and the embedding groove has a insertion groove corresponding to the graphite convex ring 4. The inner arm of the bearing seat 3 has arc-shaped grooves along its circumference corresponding to several graphite convex rings 4, and a gap is provided between the bearing seat 3 and the multi-lobed bearing shell 1. The inner wall of the graphite bushing 2 is flush with the inner wall of the adjacent multi-lobed bearing shell 1.

[0035] Preferably, such as Figure 2 As shown, the outer side of the middle portion of the graphite bushing 2 is elastically provided with a plurality of silicon carbide arc-shaped protrusions 5 along the circumferential direction. Further, as... Figure 3 As shown, the graphite bushing 2 has several mounting grooves 6 circumferentially opened on the outer side of the middle part, one end of the silicon carbide arc protrusion 5 is slidably connected to the mounting groove 6, and several springs are provided between the silicon carbide arc protrusion 5 and the mounting groove 6.

[0036] Preferably, the graphite bushing 2 and the graphite convex ring 4 are integrally formed. Alternatively, the graphite bushing 2 has a multi-lobed structure, and the graphite bushing 2 and the graphite convex ring 4 are interference-fitted.

[0037] In the process of using this utility model, the graphite bushing 2, graphite convex rings 4, and silicon carbide arc-shaped protrusions 5 are first assembled. Then, several segments of the multi-lobed bearing 1 are initially positioned. Next, the graphite bushing 2 is aligned with the embedding groove and the arc-shaped groove and placed into the multi-lobed bearing 1. Then, the other segments of the multi-lobed bearing 1 are assembled successively, and finally, the bearing seat 3 is installed. The several graphite convex rings 4 not only meet the bearing's properties but also increase its upper operating temperature limit through the heat dissipation channels they form, making it highly practical. Secondly, this utility model sets several silicon carbide arc-shaped protrusions 5 on the outer side of the middle part of the graphite bushing 2, further improving the bearing's wear resistance. During use, the silicon carbide arc-shaped protrusions 5 preferentially contact the arc-shaped groove to receive force, with the wear resistance of the silicon carbide arc-shaped protrusions 5 being superior to that of the graphite protrusions. Upon impact, the spring buffers the force on the silicon carbide arc-shaped protrusions 5 and avoids the impact, while the graphite protrusions alleviate the impact force. This utility model effectively combines the advantages of graphite and silicon carbide, making it highly practical.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A wear-resistant graphite bearing, characterized in that, The assembly includes a multi-lobed bearing shell (1), a graphite bushing (2), and a bearing housing (3). A gap is provided between the bearing housing (3) and the multi-lobed bearing shell (1). The graphite bushing (2) is disposed inside the multi-lobed bearing shell (1), and the middle part of the graphite bushing (2) is provided with an arc-shaped wear-resistant part that passes through the multi-lobed bearing shell (1) and contacts the bearing housing (3). The inner side of the bearing housing (3) is provided with an arc-shaped groove along its circumference corresponding to the middle wear-resistant part. The inner side wall of the multi-lobed bearing shell (1) is provided with an embedding groove corresponding to the graphite bushing (2), and the middle part of the embedding groove is provided with an insertion groove corresponding to the middle wear-resistant part. The wear-resistant middle part includes a graphite convex ring (4) and a silicon carbide arc-shaped protrusion (5). On both sides of the silicon carbide arc-shaped protrusion (5), a number of graphite convex rings (4) with gradually decreasing diameters are arranged sequentially from the inside to the outside. The graphite convex rings (4) are spaced apart from each other and from each other to form a heat dissipation channel. The silicon carbide arc-shaped protrusion (5) is elastically connected to the middle of the graphite bushing (2).

2. The wear-resistant graphite bearing according to claim 1, characterized in that, The graphite bushing (2) has several silicon carbide arc-shaped protrusions (5) elastically arranged along the periphery in the middle of the outer side.

3. The wear-resistant graphite bearing according to claim 2, characterized in that, The graphite bushing (2) has several mounting grooves (6) arranged around its periphery at the middle of its outer side. One end of the silicon carbide arc protrusion (5) is slidably connected to the mounting groove (6), and several springs are arranged between the silicon carbide arc protrusion (5) and the mounting groove (6).

4. The wear-resistant graphite bearing according to claim 2, characterized in that, A graphite ring (4) is provided between the silicon carbide arc protrusion (5) and the graphite bushing (2), and a number of silicon carbide arc protrusions (5) are elastically provided on the outer side of the graphite ring (4) along the circumferential direction.

5. A wear-resistant graphite bearing according to claim 4, characterized in that, The graphite bushing (2) has several circumferential grooves on the outer side of the graphite convex ring (4) in the middle. One end of the silicon carbide arc protrusion (5) is slidably connected to the groove. Several springs are provided between the silicon carbide arc protrusion (5) and the groove.

6. The wear-resistant graphite bearing according to claim 1, characterized in that, The graphite bushing (2) and the graphite convex ring (4) are integrally formed.

7. The wear-resistant graphite bearing according to claim 1, characterized in that, The graphite bushing (2) has a multi-lobed structure, and the graphite bushing (2) is press-fitted with the graphite convex ring (4).

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