Thrust bearing

Abstract

The thrust bearing comprises an outer shell, a main oil chamber is arranged at the bottom of the outer shell, and an oil suction opening is formed in the upper portion of the main oil chamber; the thrust main shaft is rotationally installed in the outer shell, a thrust disc extending outwards in the radial direction is arranged on the thrust main shaft, and when the thrust disc rotates, lubricating oil in the main oil chamber can be guided to the outer wall of the circumference of the thrust disc through the oil suction opening and rotates along with the thrust disc; a first mounting cavity for mounting a radial bearing bush assembly is formed between the outer diameter of the thrust main shaft and the outer shell; a self-lubricating system and a forced lubricating system are combined, reliable lubrication of a thrust bearing bush and a radial bearing bush under different working conditions is achieved, the self-lubricating system utilizes rotation of a thrust disc to guide oil liquid to flow, a passive oil supply path driven by a structure is constructed, the self-lubricating system is suitable for power failure or low load scenes, and the service life of the thrust bearing bush and the radial bearing bush is prolonged. And on the basis of forced lubrication, a self-lubricating system is combined to further improve the lubricating effect.

Description

Technical Field

[0001] The present application relates to the technical field of bearing lubrication, and in particular to a thrust bearing. Background Art

[0002] The thrust bearing of the ship shaft system is a key component in the ship propulsion system. It is mainly used to withstand the axial thrust generated by the propeller and transmit it to the hull structure, while ensuring the stable operation of the shaft system. During the operation of the thrust bearing, the design of the lubrication system and the efficiency of the oil circulation directly affect its service life and operational safety.

[0003] At present, forced lubrication systems are widely used in ship thrust bearings, that is, lubricating oil is continuously delivered to the space between the bearing and the thrust plate through an external oil pump to form a stable oil film, effectively reducing friction and operating temperature rise. This method is suitable for most high-load conditions. However, when the ship is in non-continuous conditions such as low load, low speed operation or intermittent start and stop, the forced lubrication system that continues to operate may cause unnecessary energy waste and reduce the energy efficiency of the overall system; in addition, when the equipment is shut down or the power is suddenly cut off, the oil pump stops working, and the thrust shaft assembly may still rotate for a short time due to inertia. During this period, if the lubricating oil cannot be replenished in time, lubrication will be interrupted, causing dry friction between the bearing and the thrust plate, and then generating local temperature rise, resulting in the risk of contact surface wear, oil film rupture and even severe ablation, affecting the overall life and operating safety of the bearing assembly. Summary of the invention

[0004] In order to solve the problem in the prior art that the bearing bushing of the existing thrust bearing is easily worn or burned due to untimely cooling, the present application provides a thrust bearing.

[0005] A thrust bearing provided in this application adopts the following technical solution: A thrust bearing, comprising: The outer shell has a main oil chamber at the bottom and an oil suction port above the main oil chamber; The thrust main shaft is rotatably mounted in the outer shell, and the thrust main shaft is provided with a thrust plate extending radially outward. When the thrust plate rotates, the lubricating oil in the main oil chamber can be guided to the outer circumferential wall of the thrust plate through the oil suction port, and rotates together with the thrust plate; a first mounting cavity for mounting a radial bearing assembly is formed between the outer diameter of the thrust main shaft and the outer shell; A collar connected to the outer shell, wherein a second mounting cavity for mounting the thrust bearing assembly is formed between the collar and the end surface of the thrust plate; Self-lubricating system, including an oil scraper connected to the outer housing and located above the thrust disc. At both ends of the oil scraper, there are respectively oil scraping parts capable of scraping the lubricating oil adhering to the outer wall of the thrust disc. The oil scraping parts can transport the scraped lubricating oil to both ends of the thrust disc through the oil scraping channels opened on the surface of the oil scraper, and respectively transport the lubricating oil to the first installation cavity and the second installation cavity through the self-lubricating oil path.

[0006] By adopting the above technical solution, during the rotation of the thrust disc, a negative pressure can be formed at the oil suction port of the main oil chamber by means of its rotation, driving the lubricating oil to pass through the oil suction port and adhere to the outer wall of the thrust disc. It rotates with the thrust disc to the position of the upper oil scraper, and the oil scraper is used to scrape the lubricating oil on the outer wall of the thrust disc. The scraped lubricating oil enters the self-lubricating oil path along the oil scraping channel and is finally sent into the first installation cavity where the radial bearing bush assembly is located and the second installation cavity where the thrust bearing bush assembly is located, realizing the self-lubricating effect of the thrust bearing.

[0007] Optionally, at both ends and both sides of the oil scraper, there are respectively an oil inlet end and an oil outlet end. The same oil inlet end can be simultaneously connected to the oil outlet ends on both sides to form the oil scraping channel.

[0008] By adopting the above technical solution, the oil scraper can effectively scrape the lubricating oil on the outer wall of the thrust disc when the thrust disc rotates, and the lubricating oil flows to both sides of the oil scraper through the oil scraping channel, realizing the two-way diversion of the lubricating oil, which is beneficial to the uniform distribution of the lubricating oil at different bearing parts, improving the lubrication efficiency and avoiding lubrication dead angles.

[0009] Optionally, the self-lubricating oil path includes: The first oil hole is opened on the outer housing and is located on both sides of the thrust disc. The oil scraping channel is connected to the first oil hole; The first oil groove is opened on the outer wall of the collar and runs through from the middle of the collar to one end. The first oil hole is located above the first oil groove, and the first oil hole is connected to the first oil groove; The second oil groove is opened on the side wall of the outer housing and is interconnected with the first oil groove; The second oil hole is opened inside the outer housing and is connected to the second oil groove. The second oil hole is connected to the first installation cavity, enabling the lubricating oil to enter the first installation cavity and realizing the lubrication of the radial bearing bush assembly; The third oil groove is formed on the side wall of the collar and is annularly distributed along the center of the collar. The third oil groove is respectively connected to the second oil groove and the second installation cavity, and is set to enable the lubricating oil to enter the second installation cavity and realize the lubrication of the thrust bearing bush assembly.

[0010] By adopting the above technical solution, through the structural design of multiple oil holes and oil grooves, the self-lubricating oil path is effectively formed, and the lubricating oil can accurately enter the first installation cavity and the second installation cavity respectively, realizing the self-lubricating effect of the bearing.

[0011] Optionally, it further includes a forced lubrication system, which includes a power component. The input end of the power component is connected to the main oil chamber for pumping the lubricating oil in the main oil chamber. The output end of the power component is connected to the outer housing and conveys the lubricating oil to the first installation cavity and the second installation cavity respectively through the forced lubricating oil path.

[0012] By adopting the above technical solution, on the basis of the above self-lubricating system, the bearing can be forcedly lubricated through the forced lubrication system, so that the thrust bearing has the dual functions of active oil supply and self-lubrication, and can provide stable lubrication guarantee in high-load or continuous operation scenarios, improving the reliability and adaptability of the lubrication system.

[0013] Optionally, the forced lubricating oil path includes: A third oil hole, which is opened on the outer housing and is connected to the first installation cavity. The third oil hole is connected to the output end of the power component; A fourth oil groove, which is in an arc structure and formed inside the outer housing. The fourth oil groove is connected to the third oil hole; A fourth oil hole, which penetrates the side wall of the outer housing. The output end of the power component is connected to the fourth oil hole; A fifth oil hole, which is opened on the collar and penetrates from one end of the collar to the other end. The number of the fifth oil holes is multiple and they are evenly distributed around the center of the collar. The fifth oil hole is connected to the fourth oil hole; An oil injection pipe, which is installed on the collar and close to one end of the thrust disc. The inner cavity of the oil injection pipe is connected to the fifth oil hole, and it is provided with oil injection holes for spraying lubricating oil towards the end face of the thrust disc.

[0014] By adopting the above technical solution, it is used to make the self-lubricating oil path and the forced lubricating oil path operate independently, which can avoid the problem of interference between different oil paths during the lubrication process; and, through the evenly distributed oil injection pipes, the lubricating oil can be evenly sprayed on the surface of the thrust disc, and the oil film in different area positions can be cooled. The cooling efficiency is high and the effect is good.

[0015] Optionally, it further includes an oil return path respectively connected to the first installation cavity and the second installation cavity. The oil return path includes: A first annular groove, which is arranged on the inner wall of the outer housing and is concave. The inner cavity of the first annular groove is connected to the first installation cavity; A second annular groove, which is arranged on the inner wall of the outer housing and close to the circumferential direction of the thrust disc. The second annular groove is connected to the second installation cavity. Two sixth oil holes are opened at the root position of the second annular groove, and the two sixth oil holes are respectively arranged on both sides of the oil suction port; The oil return chamber is arranged below the outer housing and above the main oil chamber. Its inner cavity is respectively communicated with the oil suction port and the first annular groove. A oil return port communicating with the main oil chamber is opened at the bottom of the oil return chamber and near one side. The oil return port is arranged on the side away from the side where the lubricating oil exits.

[0016] By adopting the above technical solutions, it is used to connect the self-lubricating oil path and the forced lubricating oil path to form a closed-loop flow path of the lubricating oil, so that the lubricating oil can be efficiently recovered and diverted to the main oil chamber, avoiding oil retention and resource waste. At the same time, in cooperation with the centralized storage of the main oil chamber, it is beneficial to form a more complete circulating lubrication system. In addition, the oil return port is arranged on the side away from the side where the lubricating oil exits because there is a cooling device in the main oil chamber. Such an arrangement can make the lubricating oil fully cooled before being exported outward, which is beneficial to improving the cooling effect of the lubricating oil.

[0017] Optionally, it further includes a cooling device installed inside the main oil chamber.

[0018] By adopting the above technical solutions, it helps to perform heat exchange and cooling treatment on the high-temperature lubricating oil, especially suitable for use scenarios under long-term operation or high-power load, can prevent the lubricating oil from overheating, ensure the overall thermal balance of the bearing system and extend the service life of the lubricating oil.

[0019] Optionally, the radial bearing shell assembly includes two supporting bearing shells arranged in the first installation cavity and connected into a circular ring structure. The side wall of the circular ring structure formed by the two supporting bearing shells is provided with a seventh oil hole, and the seventh oil hole is communicated with the fourth oil groove, which is set to allow the lubricating oil to flow into the inner cavity of the supporting bearing shell. An arc-shaped groove is opened at the position of the seventh oil hole and on the inner wall of the circular ring structure.

[0020] By adopting the above technical solutions, through the structural design of the radial bearing shell assembly, the lubricating oil can enter the gap between the supporting bearing shell and the thrust main shaft, so as to facilitate the formation of an oil film, achieve the lubrication effect of the supporting bearing shell, make the lubrication more sufficient, effectively reduce the friction loss and extend the service life of the supporting bearing shell.

[0021] Optionally, both ends of the thrust main shaft extend towards the outside of the outer housing, and an end cover is installed on the outer housing. A seal is installed between the end cover and the thrust main shaft.

[0022] By adopting the above technical solutions, the sealing performance of the bearing system is ensured, preventing lubricating oil leakage and external impurities from entering, and enhancing the reliability of the system operation.

[0023] Optionally, a temperature detector is installed on the outer housing, and the probe of the temperature detector passes through the side wall of the supporting bearing shell and extends towards the gap between the supporting bearing shell and the thrust shaft.

[0024] By adopting the above technical solutions, it is possible to monitor the temperature between the supporting bearing bush and the thrust main shaft in real time, timely reflect the lubrication and friction states, which is beneficial to realizing the intelligent management and early warning of the bearing operation state, thereby enhancing the safety and operation and maintenance efficiency of the system.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: By combining the self-lubricating system with the forced lubricating system, the present invention realizes reliable lubrication of the thrust bearing bush and the radial bearing bush under different working conditions: the self-lubricating system uses the rotation of the thrust disc to guide the flow of oil, constructs a passive oil supply path driven by the structure, and is applicable to power-off or low-load scenarios, and further improves the lubrication effect by combining the self-lubricating system on the basis of forced lubrication; the forced lubricating system precisely supplies oil through an external power device and is applicable to high-load or continuous operation conditions, effectively improving the lubrication stability and working efficiency of the bearing; at the same time, the optimized multi-pass oil circuit structure ensures the efficient distribution and recovery of lubricating oil between the working areas of the bearing, and significantly enhances the thermal stability, sealing performance and safety of the system in cooperation with the cooling device, extends the service life of the bearing, and meets the multiple requirements for the performance of the thrust bearing in heavy-duty applications such as ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of the present invention; Figure 2 is a longitudinal overall sectional view of the present invention; Figure 3 is a transverse partial sectional view of the present invention; Figure 4 is a longitudinal partial sectional view of the present invention; Figure 5 is a perspective view of the upper housing of the present invention Figure 1 ; Figure 6 is a perspective view of the upper housing of the present invention Figure 2 ; Figure 7 is a perspective view of the upper housing of the present invention Figure 3 ; Figure 8 is a perspective view of the lower housing of the present invention Figure 1 ; Figure 9 is a perspective view of the lower housing of the present invention Figure 2 ; Figure 10 is a sectional view of the lower housing of the present invention; Figure 11 is a perspective view of the collar of the present invention Figure 1 ; Figure 12 is a perspective view of the collar of the present invention Figure 2 ; Figure 13 is a partial exploded view of the present invention; Figure 14 is a three-dimensional view of the oil scraper of the present invention; Figure 15 is a three-dimensional view of the fuel injector of the present invention; Figure 16 is a schematic diagram of the lubrication of the support bearing shell of the present invention.

[0027] Description of reference numerals: 1. Upper housing; 101. First oil hole; 102. Second oil hole; 103. Third oil hole; 104. Fourth oil hole; 105. First ring groove; 106. Second oil groove; 107. Fourth oil groove; 108. Second ring groove; 2. Lower housing; 201. Sixth oil hole; 202. Main oil chamber; 203. Oil return cavity; 204. Oil suction port; 205. Oil return port; 3. Thrust main shaft; 301. Thrust disk; 4. Cooling device; 5. First installation cavity; 6. Second installation cavity; 7. Oil scraper; 701. Oil scraping part; 702. Oil inlet end; 703. Oil outlet end; 704. Oil scraping channel; 8. End cover; 9. Collar; 901. Third oil groove; 902. Fifth oil hole; 903. First oil groove; 904. Annular groove; 10. Support bearing shell; 1001. Seventh oil hole; 1002. Groove; 11. Temperature detector; 12. Oil pump; 13. Oil suction pipeline; 14. Oil inlet pipeline; 15. Fuel injection pipe. Detailed implementation manners

[0028] The following further describes the present application in detail with reference to the accompanying drawings.

[0029] As Figure 1-16 shown, an embodiment of the present application discloses a thrust bearing, including: An outer housing, at the bottom position of which there is a main oil chamber 202, and above the main oil chamber 202 there is an oil suction port 204. Among them, for the convenience of assembly, the outer housing includes an upper housing 1 and a lower housing 2, and the upper housing 1 and the lower housing 2 are connected by bolts; The thrust main shaft 3 is rotatably installed within the housing body. A thrust disk 301 extending radially outward is provided on the thrust main shaft 3. When the thrust disk 301 rotates, it can guide the lubricating oil in the main oil chamber 202 through the oil suction port 204 to the circumferential outer wall of the thrust disk 301 and rotate together with the thrust disk 301. A first installation cavity 5 for installing a radial bearing assembly is formed between the outer diameter of the thrust main shaft 3 and the housing body. The radial bearing assembly is used to bear the radial force during the rotation of the thrust main shaft 3 and maintain the stable operation of the thrust main shaft 3. The radial bearing assembly includes two support bearings 10 disposed in the first installation cavity 5 and connected to form an annular structure. A seventh oil hole 1001 is provided in the side wall of the annular structure formed by the two support bearings 10. The seventh oil hole 1001 is communicated with the fourth oil groove 107 and is arranged to allow lubricating oil to flow into the inner cavity of the support bearing 10. An arc-shaped groove 1002 is provided at the position of the inner wall of the annular structure in the seventh oil hole 1001. This groove 1002 is used to enable the lubricating oil to quickly enter the gap between the support bearing 10 and the thrust main shaft 3. A collar 9, which is connected to the housing body. A second installation cavity 6 for installing a thrust bearing assembly is formed between the end face of the collar 9 and the thrust disk 301. Among them, the collar 9 is assembled by two semi-annular structures through bolts, which is convenient for assembly. The thrust bearing assembly has a plurality of thrust bearings evenly distributed around the center line of the thrust main shaft 3, which are used to bear the axial load during the operation of the thrust main shaft 3 and ensure that there is no axial movement when the thrust main shaft 3 rotates. Its specific structure and installation structure belong to the conventional design in the prior art and will not be elaborated here. A self-lubricating system includes an oil scraper 7 connected to the housing body and located above the thrust disk 301. Scraping parts 701 capable of scraping the lubricating oil adhering to the outer wall of the thrust disk 301 are respectively provided at both ends of the oil scraper 7. The scraping parts 701 can transport the scraped lubricating oil to both ends of the thrust disk 301 through the oil scraping channels 704 provided on the surface of the oil scraper 7 and transport the lubricating oil to the first installation cavity 5 and the second installation cavity 6 respectively through the self-lubricating oil path.

[0030] Specifically, an oil inlet end 702 and an oil outlet end 703 are respectively provided at both ends and on both sides of the oil scraper 7. The same oil inlet end 702 can be simultaneously communicated with the oil outlet ends 703 on both sides to form the oil scraping channel 704. As Figure 14 shown, the oil scraper 7 is integrally block-shaped and has an arc-shaped lower surface. Scraping parts 701 are respectively provided at both ends, which are used to scrape the lubricating oil on the circumferential surface of the thrust disk 301 through the scraping parts 701 when the thrust main shaft 3 rotates forward or backward, so that the lubricating oil enters the oil scraping channel 704 from the oil inlet ends 702 at both ends and is then output outward through the oil scraping channel 704. The lubricating oil output outward enters the first installation cavity 5 and the second installation cavity 6 respectively through the self-lubricating oil path, that is, the lubrication of the thrust bearing and the radial bearing is realized.

[0031] Specifically, the self-lubricating oil path includes: A first oil hole 101 is opened on the outer housing and is located on both sides of the thrust disk 301. The oil scraping channel 704 is communicated with the first oil hole 101. The first oil hole 101 is used to introduce the lubricating oil scraped by the oil scraper 7 into the interior of the outer housing, specifically into the positions on both sides of the thrust disk 301; A first oil groove 903 is opened on the outer wall of the collar 9 and runs through from the middle of the collar 9 to one end. The first oil hole 101 is located above the first oil groove 903, and the first oil hole 101 is communicated with the first oil groove 903; A second oil groove 106 is opened on the side wall of the outer housing and is communicated with the first oil groove 903; A second oil hole 102 is opened in the outer housing and is communicated with the second oil groove 106. The second oil hole 102 is communicated with the first installation cavity 5, so that the lubricating oil enters the first installation cavity 5 and realizes the lubrication of the radial bearing bush assembly; A third oil groove 901 is formed on the side wall of the collar 9 and is annularly distributed along the center of the collar 9. The third oil groove 901 is respectively communicated with the second oil groove 106 and the second installation cavity 6, and is arranged to make the lubricating oil enter the second installation cavity 6 and realize the lubrication of the thrust bearing bush assembly.

[0032] The specific principle of the above self-lubricating oil path for bearing self-lubrication is as follows: Since the thrust main shaft 3 rotates, when the thrust disk 301 rotates, it can guide the lubricating oil in the main oil chamber 202 to the circumferential outer wall of the thrust disk 301 through the oil suction port 204. When the lubricating oil moves to the position where the upper oil scraper 7 is located, the oil scraper 7 scrapes the lubricating oil on the circumferential outer wall of the thrust disk 301. The scraped lubricating oil enters the first oil groove 903 from the first oil hole 101, and then enters the second oil groove 106 from the first oil groove 903. Finally, it is divided into two parts in the second oil groove 106. One part of the lubricating oil enters the first installation cavity 5 through the second oil hole 102, specifically into the fourth oil groove 107 in the first installation cavity 5, and finally passes through the seventh oil hole 1001 in the circumferential direction of the supporting bearing bush 10 and enters between the supporting bearing bush 10 and the thrust main shaft 3 to achieve the lubrication effect; the other part of the lubricating oil enters the third oil groove 901 through the second oil hole 102. Among them, an annular cushion plate is also provided between the collar 9 and the upper housing 1. The cushion plate can seal the outer end opening of the third oil groove 901 to form an annular channel. The lubricating oil passes through the cushion plate and enters the annular channel, and finally enters the second installation cavity 6 from the third oil groove 901. Under the action of the centrifugal force of the thrust disk 301, the lubricating oil is introduced into the area between the thrust bearing bush and the end of the thrust disk 301, thereby achieving the self-lubrication effect.

[0033] Specifically, it further includes a forced lubrication system, which includes a power component. The input end of the power component is connected to the main oil chamber 202 for extracting the lubricating oil in the main oil chamber 202. The output end of the power component is connected to the outer housing and conveys the lubricating oil to the first installation cavity 5 and the second installation cavity 6 through a forced lubricating oil path respectively. Among them, the power component mainly includes an oil pump 12. One end of the oil pump 12 is connected to an oil suction pipe 13, and the oil suction pipe 13 is connected to the main oil chamber 202. The other end of the oil pump 12 is connected to an oil inlet pipe 14, and the oil inlet pipe 14 is respectively connected to a third oil hole 103 and a fourth oil hole 104 on the upper housing 1. The lubricating oil is introduced into the first installation cavity 5 and the second installation cavity 6 by the principle of pumping.

[0034] Specifically, the forced lubricating oil path includes: A third oil hole 103, which is opened on the outer housing and is connected to the first installation cavity 5. The third oil hole 103 is connected to the output end of the power component; A fourth oil groove 107, which is in an arc structure and is formed inside the outer housing. The fourth oil groove 107 is connected to the third oil hole 103; A fourth oil hole 104, which penetrates the side wall of the outer housing. The output end of the power component is connected to the fourth oil hole 104; A fifth oil hole 902, which is opened on the collar 9 and penetrates from one end of the collar 9 to the other end. The number of the fifth oil holes 902 is multiple and they are evenly distributed around the center of the collar 9. The fifth oil hole 902 is connected to the fourth oil hole 104; An oil injection pipe 15, which is installed on the collar 9 and is close to one end of the thrust disc 301. The inner cavity of the oil injection pipe 15 is connected to the fifth oil hole 902, and it is provided with oil injection holes for spraying the lubricating oil towards the end face of the thrust disc 301. Specifically, the oil injection pipes 15 are evenly distributed around the center of the thrust disc 301. In this example, a total of eight oil injection pipes 15 are provided, which is the same as the number of thrust bearing pads, and they are located between adjacent two thrust bearing pads, and are used for spraying the lubricating oil towards the end face of the thrust disc 301, so as to quickly cool the adjacent lubricating oil film.

[0035] The working principle of this forced lubrication is: taking the oil pump 12 as the power source, the lubricating oil is respectively introduced into the third oil hole 103 and the fourth oil hole 104. The third oil hole 103 is directly connected to the fourth oil groove 107, so that the lubricating oil first enters the outer wall area of the support bearing pad 10, and then enters between the support bearing pad 10 and the thrust shaft through the seventh oil hole 1001 opened in the circumferential direction of the support bearing pad 10, so as to form a lubricating effect; in addition, the lubricating oil input from the fourth oil hole 104 will first enter the annular groove 904 on the outer wall of the collar 9, then enter the fifth oil hole 902, and finally enter the oil injection pipe 15. The oil injection pipe 15 is used to spray the lubricating oil towards the end of the thrust disc 301, so as to achieve the purpose of quickly cooling the previous hot lubricating oil and supplementing the lubricating oil. Specifically, it further includes an oil return oil path respectively communicating with the first installation cavity 5 and the second installation cavity 6, and the oil return oil path includes: A first annular groove 105 arranged on the inner wall of the housing body and recessed, and the inner cavity of the first annular groove 105 communicates with the first installation cavity 5; A second annular groove 108 arranged on the inner wall of the housing body and near the circumferential direction of the thrust disc 301, the second annular groove 108 communicates with the second installation cavity 6, and two sixth oil holes 201 are opened at the root position of the second annular groove 108, and the two sixth oil holes 201 are respectively arranged on both sides of the oil suction port 204; An oil return cavity 203, which is arranged below the housing body and above the main oil chamber 202, and its inner cavity communicates with the oil suction port 204 and the first annular groove 105 respectively. A return oil port 205 communicating with the main oil chamber 202 is opened at the bottom of the oil return cavity 203 and near one side. The return oil port 205 is arranged on the side far from the outward oil outlet of the lubricating oil. Since the cooling device 4 is installed in the main oil chamber 202, the oil inlet and the oil outlet are set at a relatively long distance, which is beneficial to fully cool the lubricating oil through the cooling device 4 and improve the cooling efficiency.

[0036] When the oil return oil path works specifically, first, after the lubricating oil for self-lubrication and forced lubrication completes lubricating the radial bearing bush, it will enter the first annular groove 105 of the housing body, then enter the oil return cavity 203 from the first annular groove 105, and finally flow back to the main oil chamber 202; in the working area of the thrust bearing bush, under the action of the rotation of the thrust disc 301, the lubricating oil will be in the second annular groove 108, specifically in the area between the second annular groove 108 and the circumferential surface of the thrust disc. Under the action of gravity and the rotation of the thrust disc 301, the lubricating oil can fall from the sixth oil hole 201 below the second annular groove 108 to the lower oil return cavity 203, and finally fall into the main oil chamber 202 through the oil return cavity 203.

[0037] Specifically, it further includes a cooling device 4 installed inside the main oil chamber 202. The cooling device 4 is mainly a coil structure, and there is a flowable cooling medium inside the coil for heat exchange with the lubricating oil to cool the lubricating oil. The specific structure and principle of the cooling device 4 belong to conventional means in the prior art and will not be elaborated here.

[0038] Specifically, both ends of the thrust main shaft 3 extend towards the outside of the housing body, and an end cover 8 is installed on the housing body. A sealing member is installed between the end cover 8 and the thrust main shaft 3, and the sealing member can be components such as an O-ring or a skeleton oil seal for achieving a sealing effect.

[0039] Specifically, a thermometer 11 is installed on the outer housing. The probe of the thermometer 11 passes through the side wall of the supporting bearing bush 10 and extends towards the gap between the supporting bearing bush 10 and the thrust shaft, for real-time monitoring of the temperature change of the lubricating oil at the position where the supporting bearing bush 10 is located.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A thrust bearing, characterized in that, Comprising: An outer housing having a main oil chamber (202) at its bottom position, and an oil suction port (204) above the main oil chamber (202); A thrust main shaft (3) rotatably installed within the outer housing. A thrust disc (301) extending radially outward is provided on the thrust main shaft (3). When the thrust disc (301) rotates, it can guide the lubricating oil in the main oil chamber (202) through the oil suction port (204) to the circumferential outer wall of the thrust disc (301) and rotate together with the thrust disc (301). A first installation cavity (5) for installing a radial bearing assembly is formed between the outer diameter of the thrust main shaft (3) and the outer housing; A collar (9) connected to the outer housing. A second installation cavity (6) for installing a thrust bearing assembly is formed between the collar (9) and the end face of the thrust disc (301); A self-lubricating system, including an oil scraper (7) connected to the outer housing and located above the thrust disc (301). Scraping parts (701) capable of scraping the lubricating oil adhering to the outer wall of the thrust disc (301) are respectively provided at both ends of the oil scraper (7). The scraping parts (701) can transport the scraped lubricating oil to both ends of the thrust disc (301) through an oil scraping channel (704) formed on the surface of the oil scraper (7), and respectively transport the lubricating oil to the first installation cavity (5) and the second installation cavity (6) through a self-lubricating oil path.

2. The thrust bearing according to claim 1, characterized in that, Oil inlet ends (702) and oil outlet ends (703) are respectively provided at both ends and both sides of the oil scraper (7). The same oil inlet end (702) can be simultaneously communicated with the oil outlet ends (703) on both sides to form the oil scraping channel (704).

3. A thrust bearing according to claim 1, characterized in that, The self-lubricating oil path includes: A first oil hole (101) opened on the outer housing and located on both sides of the thrust disc (301). The oil scraping channel (704) is communicated with the first oil hole (101); A first oil groove (903) opened on the outer wall of the collar (9) and penetrating from the middle of the collar (9) to one end. The first oil hole (101) is located above the first oil groove (903), and the first oil hole (101) is communicated with the first oil groove (903); A second oil groove (106) opened on the side wall of the outer housing and communicated with the first oil groove (903); A second oil hole (102) opened within the outer housing and communicated with the second oil groove (106). The second oil hole (102) is communicated with the first installation cavity (5) to allow the lubricating oil to enter the first installation cavity (5) and lubricate the radial bearing assembly; A third oil groove (901) formed on the side wall of the collar (9) and annularly distributed along the center of the collar (9). The third oil groove (901) is respectively communicated with the second oil groove (106) and the second installation cavity (6), and is arranged to allow the lubricating oil to enter the second installation cavity (6) and lubricate the thrust bearing assembly.

4. A thrust bearing according to claim 1, characterized in that, It further includes a forced lubrication system, which includes a power component. The input end of the power component is connected to the main oil chamber (202) for extracting the lubricating oil in the main oil chamber (202). The output end of the power component is connected to the outer housing and conveys the lubricating oil to the first installation cavity (5) and the second installation cavity (6) respectively through a forced lubricating oil path.

5. A thrust bearing according to claim 4, characterized in that, The forced lubricating oil path includes: A third oil hole (103) is opened on the outer housing and is connected to the first installation cavity (5). The third oil hole (103) is connected to the output end of the power component. A fourth oil groove (107) has an arc-shaped structure and is formed inside the outer housing. The fourth oil groove (107) is connected to the third oil hole (103). A fourth oil hole (104) penetrates the side wall of the outer housing. The output end of the power component is connected to the fourth oil hole (104). A fifth oil hole (902) is opened on the collar (9) and is arranged to penetrate from one end of the collar (9) to the other end. There are multiple fifth oil holes (902) and they are evenly distributed around the center of the collar (9). The fifth oil hole (902) is connected to the fourth oil hole (104). An oil injection pipe (15) is installed at one end of the collar (9) close to the thrust disk (301). The inner cavity of the oil injection pipe (15) is connected to the fifth oil hole (902), and it is provided with oil injection holes for injecting lubricating oil towards the end face of the thrust disk (301).

6. A thrust bearing according to claim 1, characterized in that, It further includes an oil return path respectively connected to the first installation cavity (5) and the second installation cavity (6). The oil return path includes: A first annular groove (105) is arranged on the inner wall of the outer housing and is concave. The inner cavity of the first annular groove (105) is connected to the first installation cavity (5). A second annular groove (108) is arranged on the inner wall of the outer housing and is close to the circumferential direction of the thrust disk (301). The second annular groove (108) is connected to the second installation cavity (6). Two sixth oil holes (201) are opened at the root position of the second annular groove (108), and the two sixth oil holes (201) are respectively arranged on both sides of the oil suction port (204). An oil return cavity (203) is arranged below the outer housing and above the main oil chamber (202). Its inner cavity is respectively connected to the oil suction port (204) and the first annular groove (105). An oil return port (205) connected to the main oil chamber (202) is opened at the bottom of the oil return cavity (203) and close to one side. The oil return port (205) is arranged on the side away from the side where the lubricating oil exits.

7. A thrust bearing according to claim 1, characterized in that, It further includes a cooling device (4) installed inside the main oil chamber (202).

8. A thrust bearing according to claim 5, characterized in that The radial bearing bush assembly includes two support bearing bushes (10) arranged in the first installation cavity (5) and connected to form a circular ring structure. A seventh oil hole (1001) is opened on the side wall of the circular ring structure formed by the two support bearing bushes (10). The seventh oil hole (1001) is connected to the fourth oil groove (107) and is arranged to allow the lubricating oil to flow into the inner cavity of the support bearing bush (10). An arc-shaped groove (1002) is opened at the position of the seventh oil hole (1001) and on the inner wall of the circular ring structure.

9. A thrust bearing according to claim 1, characterized in that, Both ends of the thrust main shaft (3) extend towards the outer direction of the housing, and an end cover (8) is installed on the housing. A seal is installed between the end cover (8) and the thrust main shaft (3).

10. A thrust bearing according to claim 8, characterized in that, A temperature detector (11) is installed on the housing. The probe of the temperature detector (11) passes through the side wall of the supporting bearing bush (10) and extends towards the gap between the supporting bearing bush (10) and the thrust shaft.

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