A spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing and its manufacturing method

Abstract

This invention provides a spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing. The working surface is made of a modified elastic metal-plastic material reinforced with high-strength synthetic fibers and high-wear-resistant special engineering plastics, composed of at least four layers. The bottom layer is a steel substrate, on which a brazing layer is provided. A metal wire pad is provided on the brazing layer, and a surface layer is provided on the metal wire pad. The brazing layer, metal wire pad, and surface layer constitute the elastic metal-plastic bearing surface. The surface layer material is modified polytetrafluoroethylene (PTFE), and the surface layer can be divided into a surface friction layer and a connecting layer, or simply a surface friction layer. The metal wire pad serves as a transition medium for bonding between the surface layer and the steel substrate. The brazing layer ensures a strong bond between the composite material bearing surface (composed of the surface layer and metal wire pad) and the steel substrate. The steel substrate provides the structural strength and rigidity of the bearing. A conductive layer is also provided between the metal wire pad and the surface layer for real-time online monitoring of the bearing's lifespan. This invention can meet the requirements of large-scale equipment.

Description

Technical Field

[0001] This invention relates to the field of sliding bearings, and more particularly to a spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing and its preparation method. Background Technology

[0002] Heavy machinery (such as cement machinery and mining machinery) typically uses low-speed, heavy-load shafts with journal linear velocities usually below 4 m / s and journal pressures exceeding 10 MPa. For a long time, rolling bearings or metal-type sliding bearings have been used. Rolling bearings, mostly self-aligning roller bearings and four-row roller bearings, frequently experience inner ring damage, roller cracking, and cage breakage during use. The high pressure on the bearing causes premature contact fatigue damage, significantly reducing its lifespan and directly impacting the overall performance of the equipment. With the development of large-scale equipment, journal linear velocities are often even lower, and journal pressures are even higher, requiring larger rolling bearings. However, large rolling bearings have higher requirements for materials and processes, longer manufacturing cycles, higher costs, and inconsistent quality, making them unavailable for widespread use. Conventional sliding bearings, with working surfaces made of traditional Babbitt metal, bronze alloys, or zinc-based alloys, are prone to bearing failure under impact loads due to the inherent properties of these materials, resulting in short lifespans. Furthermore, they require regular scraping and maintenance, leading to long maintenance times and reduced equipment uptime.

[0003] Chinese patent CN201811568124.4 discloses a self-aligning sliding bearing, including a bushing and a spherical bearing forming a circumferential sliding friction pair with the bushing. The spherical bearing has an enveloping angle of 180° to 270°. The angle between the line connecting the lower opening end of the spherical bearing to the center line and the vertical center line is 30° to 90°. The spherical bearing is installed in a spherical seat, which is installed in a bearing hole of a bearing housing. In the bearing hole, a stop block is installed at each end of the opening of the spherical seat to restrict the circumferential movement of the spherical seat. A top block is fixedly installed at each end of the opening of the spherical bearing. The top block and the stop block form a line contact. The stop block and the top block form a sliding friction pair. The surface in contact with the stop block is the sliding surface. On the end face plane of the bushing, the center lines of the sliding surfaces of the two top blocks are perpendicular to each other.

[0004] The spherical self-aligning sliding bearing invented in this patent, while possessing the characteristics of existing sliding bearings and also offering advantages such as simple manufacturing and processing, allowing for large-scale equipment without bearing limitations, has poor adaptability to changes in working shaft load. Furthermore, the sliding bearing's own friction reduction, wear resistance, load-bearing capacity, and impact load resistance need improvement. Therefore, there is an urgent need to develop a sliding bearing to address these issues.

[0005] Chinese Patent CN 106015337 A discloses an aramid-modified polytetrafluoroethylene (PTFE) double-layer plastic composite bearing and its production method. In this patent, the double-layer powder composite bearing comprises a steel base, a brazing layer, a metal wire pad, and an aramid-modified PTFE double-layer powder plastic composite layer. The composite layer includes a working layer (light yellow) and a bonding layer (reddish-brown). The weight percentage of each material in the working layer is: aramid fiber 0.5-3%, polystyrene 15-20%, and the balance being PTFE. The weight percentage of each material in the bonding layer is: pure copper powder 8-20%, pure tin powder 2-5%, and the balance being PTFE, etc. This invention significantly improves the bonding strength between the bonding layer and the metal wire pad, compensates for the poor toughness of the working layer, overcomes the quality problem of easy cracking on the bearing surface, and allows for the determination of the bearing's lifespan termination by observing the color changes of the working layer and bonding layer during disassembly and bearing inspection.

[0006] However, based on the applicant's years of experience, the initial design of double-layer powder elastic metal-plastic roofing sheets still has many problems in use and manufacturing. For example, the process is cumbersome, the elastic modulus of the elastic metal-plastic roofing sheets is not uniform, the difference in elastic modulus of the same sheet is large (>30%), the load-bearing capacity is low (<10MPa), pits may appear on the sheet surface during high-temperature operation, and the end of the bearing's lifespan can only be detected during sheet removal inspection, and real-time online monitoring is not possible.

[0007] In view of this, the applicant has continuously researched and designed, and optimized the first-generation double-layer powder elastic metal-plastic tile in terms of process and materials to solve the shortcomings of the first-generation product. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides a spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing for supporting a rotating shaft, and a method for its preparation. The technical means employed in this invention are as follows:

[0009] A spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing has a working surface made of high-strength synthetic fiber reinforced with high-wear-resistant special engineering plastics, which is composed of four or more layers. The bottom layer is a steel substrate, on which a brazing layer is provided, a metal wire pad is provided, and a surface layer is provided on the metal wire pad. The brazing layer, metal wire pad, and surface layer constitute the elastic metal-plastic tile surface. The surface layer material is modified polytetrafluoroethylene, which may be divided into a surface friction layer and a connecting layer, or only a surface friction layer. The metal wire pad serves as a transition medium for bonding between the surface layer and the steel substrate. The brazing layer ensures a firm bond between the composite tile surface composed of the surface layer and the metal wire pad and the steel substrate. The steel substrate provides the structural strength and rigidity of the bearing.

[0010] Furthermore, a conductive layer is provided between the metal wire pad and the surface layer. The conductive layer is conductive and is used for real-time online monitoring of the end-of-life.

[0011] Furthermore, the weight percentage of each material in the surface layer is: aramid fiber 0~1.5%, polyphenylene ester 13~17%, and the balance is polytetrafluoroethylene;

[0012] The weight percentage of each material in the conductive layer is as follows: 0~20% copper powder, 8~15% graphite, 5~10% carbon fiber, 0~10% polyetheretherketone, 0~20% glass fiber, 0~5% conductive carbon nanotubes; the balance is polytetrafluoroethylene.

[0013] As one technical solution, the spherical sliding bearing adopts a spliced ​​structure, including a spherical bearing seat, a bearing liner installed in the inner hole of the spherical bearing seat, and an elastic metal-plastic bearing surface composite on the inner diameter and end face of the bearing liner. Several oil guide grooves for end face lubrication are provided on the surface layer of both end faces. The spherical bearing seat is an integral structure, and the bearing liner is divided into several pieces. The bearing liner is provided with an oil inlet edge. Each bearing liner is connected to the spherical bearing seat by bolts and spring washers. A flat key to prevent movement is provided between the last bearing liner in the rotation direction and the spherical bearing seat, and the bearing is positioned axially by a shoulder.

[0014] Furthermore, the working journal of the spherical sliding bearing is 600mm < d ≤ 1200mm.

[0015] As another technical solution, the spherical sliding bearing adopts a multi-oil wedge structure, including a spherical bearing seat, a bearing liner installed in the inner hole of the spherical bearing seat, and an elastic metal-plastic bearing surface composite on the inner diameter and two end faces of the bearing liner. The spherical bearing seat is an integral structure, and the bearing liner is divided into several pieces. Keyways are opened on the spherical bearing seat corresponding to the bearing liner. The bearing liners are positioned by T-keys and pressed onto the spherical bearing seat by T-keys and bolts. The two ends of the bearing liner are connected to the spherical bearing seat by bolts and spring washers. A flat key to prevent movement is provided between the last bearing liner in the rotation direction and the spherical bearing seat, and it is positioned axially by a shoulder.

[0016] Furthermore, the working journal diameter (d) of the spherical sliding bearing is greater than 1200 mm.

[0017] Furthermore, a forced oil injection pipe is provided above the T-key, with the upper end of the oil injection pipe 10-15mm away from the working layer of the lining surface. Several oil injection holes are provided on the oil injection pipe, with a diameter of 2-5mm. Each lining is provided with an oil inlet wedge in the radial direction.

[0018] This invention also discloses a method for preparing the above-mentioned spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing, comprising the following steps:

[0019] S1. Weigh an appropriate amount of metal wire according to the ratio and cover it on the working layer. Apply a preset pressure and hold the pressure for a certain time to obtain a metal wire pad.

[0020] S2. Weigh and mix the materials in the conductive layer according to the ratio, cover them on the metal wire pad, and press them flat with a metal plate.

[0021] S3. Weigh and mix the materials in the friction layer according to the ratio, cover them on the conductive layer, apply a preset pressure, and hold the pressure for a certain time to obtain the elastic metal-plastic tile blank.

[0022] S4. Place the elastic metal-plastic tile blank in a vacuum sintering furnace for sintering and plasticizing. The sintering temperature is 370~390℃ and the sintering time is 30~60min. After cooling down to 100~60℃ in the furnace, the tile is taken out to obtain the elastic metal-plastic tile surface.

[0023] S5. Immerse the elastic metal-plastic tile surface into the liquid solder container, so that the liquid solder fills the gaps in the metal wire pad;

[0024] S6. Braze the elastic metal-plastic tile surface obtained in step S5 to the steel tile base to obtain an elastic metal-plastic tile.

[0025] S7. Machining the elastic metal-plastic tile yields the finished bearing bush;

[0026] S8. Place an insulating pad of the same size at the bottom of the finished bearing steel base from step S7.

[0027] The spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing of this invention features low friction and high wear resistance. Its spherical kinematic pair structure provides unique self-adjustment. Furthermore, the elastic composite material sliding bearing, with its plastic surface layer connected to the steel substrate via elastic wire pads, has a low elastic modulus and can also self-adjust, effectively improving the bearing's stress condition under variable loads. This prevents thinning or damage to the oil film on the bearing surface due to mechanical and temperature deformation, providing a large safety margin. It also possesses certain heat-insulating properties, reducing thermal deformation of the substrate. Its high load-bearing capacity, exceeding that of conventional sliding bearings such as Babbitt metal bearings by more than 20%, allows for smaller overall machine design dimensions and lower costs. It is suitable for thin oil and grease lubrication and can still operate normally under mixed oil-water lubrication conditions. It has anti-seize properties, preventing adhesion and burn-off accidents. Installation and maintenance do not require scraping the bearing surface, saving installation and maintenance time. For spherical sliding bearings with a journal diameter of 600mm < d ≤ 1200mm, a spliced ​​structure is adopted, which expands the bearing size range, facilitates bearing replacement after maintenance, and only requires replacement of the bearing liner, reducing equipment maintenance costs and shortening maintenance cycles. For spherical sliding bearings with a journal diameter of d > 1200mm, a multi-oil wedge structure is adopted, which expands the bearing size range, meets the requirements of large-scale equipment, and reduces equipment maintenance costs. By adding an oil spray structure and oil inlet wedges, sufficient oil intake is ensured for each bearing, and hot and cold oil are fully exchanged. The lubricating oil with a certain pressure can remove the grinding generated by the friction surface and prevent the oil inlet edge from being blocked. The multi-oil wedge bearing reduces the running distance of the lubricating oil, reduces the oil film temperature rise, improves the safety margin of bearing operation, and avoids bearing failure due to insufficient lubrication. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the working surface layer of the spherical self-aligning multi-oil wedge elastic composite material sliding bearing in Embodiment 1 of the present invention.

[0030] Figure 2 This is a schematic diagram of the working surface layer of the spherical self-aligning multi-oil wedge elastic composite material sliding bearing in Embodiment 2 of the present invention.

[0031] Figure 3 This is a front sectional view of a spherical sliding bearing with a working journal diameter of 600mm < d ≤ 1200mm.

[0032] Figure 4This is a side sectional view of a spherical sliding bearing with a working journal diameter of 600mm < d ≤ 1200mm.

[0033] Figure 5 This is a front sectional view of a spherical sliding bearing with a journal diameter d > 1200.

[0034] Figure 6 This is a schematic diagram of an oil spraying device between the bearing shells of a spherical sliding bearing with a journal diameter d > 1200.

[0035] In the diagram: 1. Surface layer; 2. Wire pad; 3. Brazing layer; 4. Steel substrate; 5. Conductive layer; 6. Spherical bearing seat; 7. Flat key; 8. Composite material layer; 9. Spring washer; 10. Connecting bolt; 11. Oil guide groove; 12. T-key; 13. Bearing liner A; 14. Oil injection pipe; 15. Bearing liner B; 16. Oil injection hole; 17. Oil inlet wedge. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the cement industry, the bearings used in roller presses are double-row self-aligning roller bearings. Due to the large load they bear, they often suffer premature fatigue damage, which greatly reduces the service life of the bearings. On the other hand, with the increasing demand for cement production, roller presses are also developing towards high-capacity models. However, the current processing capacity, load-bearing capacity and manufacturing level of large-size bearings limit the development of roller presses towards larger models.

[0038] Against this backdrop, embodiments of the present invention, through optimized design and calculation, use elastic metal-plastic tiles to replace rolling bearings. The bearings of this project are installed and in operation at a cement plant in Sichuan.

[0039] The use of elastic metal-plastic bearing pads improves the bearing's load-bearing capacity and greatly extends its service life; it also reduces manufacturing difficulty and increases the possibility of larger bearings; traditional rolling bearings can only be scrapped and replaced when damaged, while sliding bearings can only have their components replaced, greatly saving on usage costs and maintenance expenses.

[0040] Specifically, such as Figure 1As shown in the figure, this invention discloses a spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing. Its working surface is made of high-strength synthetic fiber reinforced with high-wear-resistant special engineering plastics, resulting in a modified elastic metal-plastic tile material composed of four or more layers. The bottom layer is a steel substrate 4, with a brazing layer 3 on the steel substrate, a metal wire pad 2 on the brazing layer, and a surface layer 1 on the metal wire pad. The brazing layer, metal wire pad, and surface layer form the elastic metal-plastic tile surface. The surface layer material is modified polytetrafluoroethylene, providing excellent friction and wear performance. The surface layer can be divided into a surface friction layer and a connecting layer, or it can be only a surface friction layer. The metal wire pad serves as a transition medium for the bonding between the surface layer and the steel substrate. The surface friction layer includes a connecting layer or multiple layers of engineering plastics. The brazing layer ensures a firm bond between the composite tile surface (composed of the surface layer and metal wire pad) and the steel substrate. The steel substrate provides the structural strength and rigidity of the bearing.

[0041] In order to enable online monitoring of the end-of-life of flexible metal-plastic roofing tiles, such as... Figure 2 As shown, in Figure 1 Based on this, a conductive layer 5 is also provided between the metal wire pad and the surface layer. This conductive layer is conductive and used for real-time online monitoring of the thrust bearing's end-of-life. Its main material characteristics are as follows: low friction and high wear resistance; unique self-adjusting properties, effectively improving the stress condition of the bearing under variable loads, avoiding thinning or damage of the oil film on the bearing surface due to mechanical and temperature deformation, providing a large safety margin; certain heat-insulating properties, reducing thermal deformation of the substrate; high load-bearing capacity, more than 20% higher than conventional sliding bearings such as Babbitt alloy bearings, allowing for smaller overall machine design dimensions and lower costs; adaptable to thin oil lubrication and grease lubrication, and can still operate normally under oil-water mixed lubrication conditions; anti-seize properties, preventing adhesion and burn-off accidents; no need to scrape the bearing surface during installation and maintenance, saving installation and maintenance time; only the bearing surface needs to be replaced when replacing the bearing, reducing costs and maintenance time; the conductive bonding layer enables real-time online monitoring of the thrust bearing's end-of-life, eliminating the need for frequent disassembly to check wear.

[0042] The weight percentage of each material in the surface layer is: aramid fiber 0~1.5%, polyphenylene ester 13~17%, and the balance is polytetrafluoroethylene;

[0043] The weight percentage of each material in the conductive layer is as follows: 0~20% copper powder, 8~15% graphite, 5~10% carbon fiber, 0~10% polyetheretherketone, 0~20% glass fiber, 0~5% conductive carbon nanotubes; the balance is polytetrafluoroethylene.

[0044] Depending on the operating conditions of the bearings and existing production capabilities, different sliding structures and lubrication methods are used for spherical self-aligning bearings with different diameters. Specifically, for example... Figure 3 , 4As shown, the spherical sliding bearing can adopt a spliced ​​structure, including a spherical bearing seat 6, a bearing liner installed in the inner hole of the spherical bearing seat, and an elastic metal-plastic bearing surface 8 composited on the inner diameter and end face of the bearing liner. Several oil guide grooves 11 for end face lubrication are provided on the surface layer of both end faces. The spherical bearing seat is a single integral structure, while the bearing liner is divided into several pieces. Each bearing liner is provided with an oil inlet wedge. Each bearing liner piece is attached to the spherical bearing seat by bolts 10 and spring washers 9. A flat key 7 to prevent axial movement is provided between the last bearing liner piece and the spherical bearing seat in the rotational direction, and it is positioned axially by a shoulder. The bearing liner is the steel substrate.

[0045] like Figure 5 , Figure 6 As shown, the spherical sliding bearing can also adopt a multi-oil wedge structure, including a spherical bearing seat, a bearing liner installed in the inner hole of the spherical bearing seat, and an elastic metal-plastic bearing surface composite on the inner diameter and two end faces of the bearing liner. The spherical bearing seat is an integral structure, and the bearing liner is divided into several pieces. Keyways are opened on the spherical bearing seat corresponding to the bearing liner. Bearing liner A13 and bearing liner B15 are positioned by T-key 12 and pressed onto the spherical bearing seat by T-key and bolts. The two ends of the bearing liner are connected to the spherical bearing seat by bolts and spring washers. A flat key to prevent movement is provided between the last bearing liner in the rotation direction and the spherical bearing seat, and it is positioned axially by the shoulder.

[0046] The above-mentioned splicing structure and multi-oil wedge structure can be selected according to the actual situation. As an optional implementation method, the splicing structure is adopted for spherical sliding bearings with working journal 600mm < d ≤ 1200mm, and the multi-oil wedge structure can be adopted for spherical sliding bearings with working journal d > 1200.

[0047] A forced oil injection pipe 14 is provided above the T-key. The upper end of the oil injection pipe is 10-15mm away from the working layer of the lining surface. Several oil injection holes 16 are provided on the oil injection pipe, with a diameter of 2-5mm. Each lining has an oil inlet wedge 17 at both ends in the radial direction.

[0048] This invention also discloses a method for preparing the above-mentioned spherical self-aligning multi-oil wedge elastic metal-plastic sliding bearing.

[0049] The friction layer, conductive layer and metal wire pad are formed by cold pressing and sintering, and then brazed to the steel substrate after being immersed in tin. The insulating layer is either sprayed on the substrate or an insulating pad is added to the bottom of the substrate.

[0050] The weight percentages of the materials in the friction layer are as follows: aramid fiber: 1%, polyphenylene ester: 15%, polytetrafluoroethylene: 84%.

[0051] The weight percentages of the materials in the conductive layer are as follows: copper powder: 10%, graphite: 10%, carbon fiber: 10%, and the balance is polytetrafluoroethylene.

[0052] Specifically, the steps include the following:

[0053] S1. Weigh an appropriate amount of metal wire according to the ratio and cover it on the working layer. Apply a preset pressure and hold the pressure for a certain time to obtain a metal wire pad. In this embodiment, apply a pressure of 50MPa and hold the pressure for 15 minutes.

[0054] S2. Weigh and mix the materials in the conductive layer according to the ratio, cover them on the metal wire pad, and press them flat with a metal plate.

[0055] S3. Weigh and mix the materials in the friction layer according to the ratio, and cover them on the conductive layer. Apply a preset pressure and hold the pressure for a certain time to obtain the elastic metal-plastic tile blank. S1, S2 and S3 are cold-pressed in a molding die. In this embodiment, a pressure of 50MPa is applied and held for 5min.

[0056] S4. The elastic metal-plastic tile blank is placed in a vacuum sintering furnace for sintering and plasticizing. The sintering temperature is 370~390℃ and the sintering time is 30~60min. The blank is then cooled to 100~60℃ and removed from the furnace to obtain the elastic metal-plastic tile surface. In this embodiment, the sintering temperature is 380℃ and the sintering time is 30min. The blank is then cooled to 90℃ and removed from the furnace.

[0057] S5. Immerse the elastic metal-plastic tile surface into the liquid solder container, so that the liquid solder fills the gaps in the metal wire pad;

[0058] S6. Braze the elastic metal-plastic tile surface obtained in step S5 to the steel tile base to obtain an elastic metal-plastic tile.

[0059] S7. Machining the elastic metal-plastic tile yields the finished bearing bush;

[0060] S8. Place an insulating pad of the same size at the bottom of the finished bearing steel base from step S7.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spherical self-aligning multi-oil wedge elastomeric metal plastic sliding bearing, characterized in that The working surface is made of high-strength synthetic fiber, high-wear-resistant special engineering plastic and reinforced modified elastic metal plastic tile material, which is composed of four layers or more than four layers, wherein the bottom layer is a steel base, the steel base is provided with a brazing layer, the brazing layer is provided with a metal wire pad, and the metal wire pad is provided with a surface layer, the brazing layer, the metal wire pad and the surface layer are used as the elastic metal plastic tile surface, the surface layer material is modified polytetrafluoroethylene, and the surface layer can be divided into a surface friction layer and a connecting layer, or only a surface friction layer; the metal wire pad is used as a transition medium for the combination of the surface layer and the steel base; the brazing layer is used to ensure the firm combination of the surface layer and the metal wire pad, and the steel base provides the structural strength and rigidity of the bearing; The weight percentage of each material in the surface layer is: aramid fiber 0-1.5%, polyphenyl ester 13-17%, and the balance is polytetrafluoroethylene; A conductive layer is further arranged between the metal wire pad and the surface layer, and the conductive layer has conductivity and is used for real-time online monitoring of the terminal life; The weight percentage of each material in the conductive layer is: 0-20% copper powder, 8-15% graphite, 5-10% carbon fiber, 0-10% polyether ether ketone, 0-20% glass fiber, and 0-5% conductive carbon nanotube; and the balance is polytetrafluoroethylene; The spherical sliding bearing adopts a multi-oil wedge structure, including a spherical tile seat, a tile liner installed in the inner hole of the spherical tile seat, and an elastic metal plastic tile surface combined on the inner diameter and both end surfaces of the tile liner, wherein the spherical seat is an integral structure, the tile liner is divided into several blocks, key grooves are arranged on the spherical tile seat corresponding to the tile liners, the tile liners are positioned through T-shaped keys, and the tile liners are pressed on the spherical tile seat through the T-shaped keys and bolts, the tile liners are combined on the spherical seat through bolts and spring washers, and a anti-shifting key is arranged between the last tile liner in the rotating direction and the spherical tile seat for positioning. A forced oil injection pipe is arranged above the T-shaped key, the upper end of the oil injection pipe is 10-15 mm away from the surface working layer of the tile liner, a plurality of oil injection holes are arranged on the oil injection pipe, the diameter of the oil injection holes is 2-5 mm, and each tile liner is provided with an oil wedge in the radial direction.

2. The spherical self-aligning multi-oil wedge elastomeric plastic sliding bearing according to claim 1, characterized in that The working shaft neck of the spherical sliding bearing is greater than 1200 mm.

3. A method of producing the spherical self-aligning multi-oil wedge elastomeric metal plastic sliding bearing according to claim 1 or 2, characterized in that The method comprises the following steps: S1, a proper amount of metal wire is weighed according to the proportion and covered on the working layer, a preset pressure is applied, and the metal wire pad is obtained after a certain pressure maintaining time; S2, each material in the conductive layer is weighed, mixed, and covered on the metal wire pad, and the metal plate is used to press it flat; S3, each material in the friction layer is weighed, mixed, and covered on the conductive layer, a preset pressure is applied, and the elastic metal plastic tile surface blank is obtained after a certain pressure maintaining time; S4, the elastic metal plastic tile surface blank is sintered and plasticized in a vacuum sintering furnace, the sintering temperature is 370-390 DEG C, the sintering time is 30-60 min, the furnace is cooled to 100-60 DEG C, and the elastic metal plastic tile surface is obtained; S5, the elastic metal plastic tile surface is immersed in a liquid solder container, and the liquid solder is filled into the gap of the metal wire pad; S6, the elastic metal plastic tile surface obtained in step S5 is brazed to the steel tile base to obtain the elastic metal plastic tile. S7, the elastic metal plastic tile is machined to obtain a finished bearing bush; S8, the finished bearing bush in step S7 is configured with an insulating pad plate of the same size at the bottom of the steel base.

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