Self-lubricating system of thrust bearing

Abstract

The utility model relates to a thrust bearing self-lubricating system which comprises an outer shell, a first oil groove, a second oil groove and a thrust bearing, the thrust shaft is rotatably installed in the outer shell, and a first cavity used for installing the supporting bearing bush is formed between the thrust shaft and the outer shell; a thrust disc extending in the radial direction is arranged in the middle of the thrust shaft, and a gap is formed between the thrust disc and the inner wall of the outer shell. The number of the lantern rings is two, the lantern rings are fixedly installed in the outer shell, second cavities used for installing the thrust bearings are formed between the lantern rings and the thrust disc, and second oil grooves are formed in the lantern rings; according to the lubricating oil circulating system, a completely autonomous lubricating oil circulating system in the bearing operation process is achieved, when the thrust disc rotates, lubricating oil can be attached to the outer wall of the thrust disc, the lubricating oil can be efficiently collected through the oil scraper and conveyed to the first cavity and the second cavity, the whole lubricating process can be completed without external power, and the lubricating efficiency is improved. And the reliability and the energy-saving property of the system are obviously improved.

Description

Technical Field

[0001] This application relates to the field of bearing lubrication technology, and in particular to a thrust bearing self-lubricating system. Background Technology

[0002] Thrust bearings in ship shafting are key components of ship propulsion systems. They primarily bear the axial thrust generated by the propeller and transmit it to the hull structure, while ensuring the smooth operation of the shafting. Effective circulation of lubricating oil is crucial for the stable operation of these thrust bearings.

[0003] In existing technologies, thrust bearings used in marine shafting systems generally employ forced lubrication systems, which rely on external oil pumps or gravity-fed oil supply (such as high-level oil tank designs) to forcibly deliver lubricating oil to the bearing. While this lubrication method can meet the lubrication requirements under normal operating conditions, it also has the following drawbacks in practical applications: Firstly, because the operating conditions of the bearings are constantly changing, forced lubrication can easily increase system energy consumption and waste electrical resources under low-load conditions. Secondly, after the system stops, the forced lubrication system is also de-energized and stops working, while the bearing continues to rotate due to inertia. In this case, the bearing will generate high temperatures under unlubricated conditions, leading to a reduction in bearing life. Utility Model Content

[0004] To address the problems mentioned in the background art, such as the existing thrust bearing lubrication system only having a self-lubricating function, resulting in wasted power resources under low load conditions and reduced service life of the bearing due to lack of lubrication after power failure, this application provides a thrust bearing self-lubricating system.

[0005] The thrust bearing self-lubricating system provided in this application adopts the following technical solution:

[0006] A thrust bearing self-lubricating system, comprising:

[0007] The outer casing has a first oil groove on its inner wall;

[0008] A thrust shaft is rotatably mounted inside the housing, and a first cavity for mounting a support bearing is formed between the thrust shaft and the housing; the thrust shaft has a thrust disc extending radially in its middle part, and a gap is formed between the thrust disc and the inner wall of the housing.

[0009] There are two collars, which are fixedly installed inside the outer casing. A second cavity for installing the thrust bearing is formed between the collar and the thrust disc. The collar is provided with a second oil groove.

[0010] The oil scraper is located at the top of the outer casing and is positioned directly above the thrust plate. Oil inlet channels are provided at both ends of the upper part of the oil scraper, and the oil outlet of each oil inlet channel extends to both sides of the oil scraper and penetrates the side wall of the oil scraper.

[0011] When the thrust disc rotates, the oil scraper can scrape the lubricating oil on the outer wall of the thrust disc. After the lubricating oil enters the oil inlet channel, it is discharged from the oil outlet of the oil scraper and passes through the outer shell into the second oil groove. After passing through the first oil groove, it enters the first cavity and the second cavity respectively, thus achieving the self-lubricating effect on the support bearing and the thrust bearing.

[0012] By adopting the above technical solution, a fully autonomous lubricating oil circulation system is realized during the operation of the bearing. When the thrust disc rotates, the lubricating oil can adhere to the outer wall of the thrust disc. The oil scraper can efficiently collect the lubricating oil and transport it to the first cavity and the second cavity. The entire lubrication process can be completed without external power, which significantly improves the reliability and energy efficiency of the system.

[0013] Optionally, it also includes two side plates, which are respectively installed on the outside of the two collars. The outer wall of the side plate is in contact with the inner wall of the outer shell. The surface of the side plate is provided with a through groove that runs through its thickness direction. The through groove is connected to the first oil groove on the inner wall of the outer shell and is also connected to the second cavity.

[0014] By adopting the above technical solution, on the one hand, since the side plate is in close contact with the outer shell, it can cover the first oil groove, avoiding the problem of lubricating oil flowing out when it flows in the first oil groove. On the other hand, the through groove structure opened on the surface can allow lubricating oil to enter the second cavity, so as to achieve the lubricating effect of lubricating oil on the thrust bearing.

[0015] Optionally, the bottom of the outer casing is provided with a main oil chamber, and the upper part of the main oil chamber is connected to the working chamber of the thrust plate through an oil outlet. When the thrust plate rotates with the thrust shaft, the lubricating oil in the main oil chamber can be sucked into the gap between the thrust plate and the outer casing under the pumping effect.

[0016] By adopting the above technical solution, lubricating oil is stored in the main oil chamber. The negative pressure generated by the rotation of the thrust disc draws the lubricating oil from the main oil chamber to its outer wall surface. No additional power is required. It is suitable for maintaining bearing lubrication in emergency situations such as sudden power outages. At the same time, it can be combined with the system's own forced lubrication to solve the problem of lubricating oil delivery under different working conditions, which greatly improves the safety and reliability of the system.

[0017] Optionally, a return oil chamber is provided between the main oil chamber and the working chamber of the thrust disk. The return oil chamber is connected to the working chamber through oil inlets located on the left and right sides of the oil outlet. The oil inlets are opened on the outer shell of the thrust disk in the circumferential direction. The return oil chamber is connected to the main oil chamber through the return oil inlet, and the return oil chamber is connected to the first cavity and the second cavity respectively.

[0018] By adopting the above technical solution, the lubricating oil can be returned. When the thrust disc rotates, the lubricating oil can enter the return oil chamber from the oil inlet and finally flow back into the main oil chamber, forming a circulation effect of the lubricating oil.

[0019] Optionally, the outer casing has at least one first oil hole at the top and on both sides of the oil scraper, through which the lubricating oil scraped from the oil scraper can enter the interior of the outer casing.

[0020] By adopting the above technical solution, the setting of the first oil hole provides a direct channel for lubricating oil to enter the interior of the housing, ensuring that the lubricating oil collected by the scraper can quickly enter the self-lubricating system, thereby improving the timeliness and efficiency of lubrication response.

[0021] Optionally, the first oil hole is connected to the second oil groove opened on the outer wall of the collar.

[0022] By adopting the above technical solution, lubricating oil can flow from the first oil hole into the second oil groove, thus maintaining the effective flow of lubricating oil.

[0023] Optionally, a second oil hole is provided inside the outer casing, which connects the first oil groove to the first cavity.

[0024] By adopting the above technical solution, some of the lubricating oil discharged from the first oil groove can enter the second oil hole and finally enter the first cavity, thereby achieving the lubrication effect on the supporting bearing in the first cavity.

[0025] Optionally, it also includes a top cover, which is installed on the top of the housing, and the oil scraper is fixedly connected to the top cover.

[0026] By adopting the above technical solution, the top cover is mainly used to fix the oil scraper, making the oil scraper assembly more secure.

[0027] Optionally, the bottom surface of the oil scraper is a concave arc surface, and the two ends of the oil scraper are formed with downwardly inclined scraping parts. The distance between the end of the scraping part and the outer wall of the thrust plate is smaller than the gap between the thrust plate and the outer shell.

[0028] By adopting the above technical solution, the structural design of the oil scraper can effectively collect lubricating oil from the outer wall of the thrust disc, thereby improving the oil scraping effect.

[0029] Optionally, the outer casing includes an upper casing and a lower casing, which are fixedly connected.

[0030] By adopting the above technical solution, the design of the split outer shell facilitates the installation of internal components, making the overall structure easier to assemble and disassemble.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] This invention realizes a fully autonomous lubricating oil circulation system during bearing operation. When the thrust disc rotates, the lubricating oil can adhere to the outer wall of the thrust disc. The oil scraper can efficiently collect the lubricating oil and transport it to the first cavity and the second cavity. The entire lubrication process can be completed without external power, which significantly improves the reliability and energy efficiency of the system. Attached Figure Description

[0033] Figure 1 This is a perspective view of the present invention;

[0034] Figure 2 This is an exploded view of the present invention;

[0035] Figure 3 This is a cross-sectional view of the present invention. Figure 1 ;

[0036] Figure 4 This is a cross-sectional view of the present invention. Figure 2 ;

[0037] Figure 5 This is a top view of the present invention;

[0038] Figure 6 This is a utility model Figure 5 A magnified view of a portion of the document;

[0039] Figure 7 This is the three-dimensional lower shell of the present invention. Figure 1 ;

[0040] Figure 8 This is a cross-sectional view of the lower housing of this utility model;

[0041] Figure 9 This is the three-dimensional lower shell of the present invention. Figure 2 ;

[0042] Figure 10 It is a three-dimensional upper shell of this utility model. Figure 1 ;

[0043] Figure 11 It is a three-dimensional upper shell of this utility model. Figure 2 ;

[0044] Figure 12 This is a perspective view of the collar of this utility model;

[0045] Figure 13 This is a perspective view of the side panel of this utility model;

[0046] Figure 14 This is a perspective view of the oil scraper of this utility model;

[0047] Figure 15 This is a cross-sectional view of the first cavity of this utility model.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Lower housing; 101. Oil outlet; 102. Oil inlet; 103. Working chamber; 104. Oil return port; 105. Main oil chamber; 106. Oil return chamber; 107. First annular groove; 108. Second annular groove;

[0050] 2. Thrust shaft; 201. Thrust disc;

[0051] 3. Collar; 301. Second oil groove;

[0052] 4. Side plate; 401, through groove;

[0053] 5. Upper housing; 501. First oil hole; 502. Second oil hole; 503. First oil groove;

[0054] 6. Oil scraper; 601. Oil inlet channel; 602. Oil outlet; 603. Oil scraping section;

[0055] 7. Top cover; 8. First cavity; 9. Second cavity; 10. Support bearing; 1001. Third oil hole. Detailed Implementation

[0056] The present application will be further described in detail below with reference to the accompanying drawings.

[0057] like Figure 1-15 As shown in the figure, this application discloses a thrust bearing self-lubricating system, comprising:

[0058] The outer shell has a first oil groove 503 on its inner wall; the outer shell includes an upper shell 5 and a lower shell 1, which are fixedly connected, specifically, the upper shell 5 and the lower shell 1 are connected by bolts.

[0059] The thrust shaft 2 is rotatably mounted inside the housing. A first cavity 8 for mounting the support bearing 10 is formed between the thrust shaft 2 and the housing. The thrust shaft 2 has a thrust disk 201 extending radially in the middle. The thrust disk 201 is integrally connected to the thrust shaft 2. A gap is formed between the thrust disk 201 and the inner wall of the housing.

[0060] There are two collars 3, which are fixedly installed inside the outer casing. A second cavity 9 for installing the thrust bearing is formed between the collar 3 and the thrust disk 201. The collar 3 is provided with a second oil groove 301. To facilitate the installation of the collar 3, the collar 3 is formed by connecting two half-rings together, specifically by bolts. The second oil groove 301 is located on the outer wall of the collar 3. In this embodiment, there are two second oil grooves 301. The second oil groove 301 starts from the middle of the collar 3 and extends through its end face.

[0061] The oil scraper 6 is located on the top of the housing and positioned directly above the thrust plate 201. The oil scraper 6 has oil inlet channels 601 at both ends above it. The oil outlet 602 of each oil inlet channel 601 extends to both sides of the oil scraper 6 and penetrates the side wall of the oil scraper 6. The oil scraper 6 is mainly used to scrape the lubricating oil adhering to the outer surface of the thrust plate 201.

[0062] When the thrust disc 201 rotates, the scraper 6 can scrape the lubricating oil on the outer wall of the thrust disc 201. After the lubricating oil enters the oil inlet channel 601, it is discharged from the oil outlet end 602 of the scraper 6, passes through the outer shell and enters the second oil groove 301. After passing through the first oil groove 503, it enters the first cavity 8 and the second cavity 9 respectively, achieving the self-lubricating effect on the support bearing 10 and the thrust bearing.

[0063] Specifically, it also includes side plates 4, of which there are two. In this example, to facilitate the assembly of the side plates 4, the side plates 4 are made of two semi-rings joined together to form a ring. The two side plates 4 are respectively installed on the outside of the two collars 3, and the outer wall of the side plate 4 is in contact with the inner wall of the outer shell. A through groove 401 is opened on the surface of the side plate 4, which runs through its thickness direction. In this example, the channel is an arc-shaped structure. The through groove 401 is connected to the first oil groove 503 on the inner wall of the outer shell, and the through groove 401 is connected to the second cavity 9.

[0064] Specifically, the bottom of the outer casing is provided with a main oil chamber 105, which is used to store lubricating oil. The main oil chamber 105 is connected to the working chamber 103 of the thrust disk 201 through an oil outlet 101. When the thrust disk 201 rotates with the thrust shaft 2, the lubricating oil in the main oil chamber 105 can be sucked into the gap between the thrust disk 201 and the outer casing under the pumping effect.

[0065] Specifically, a return oil chamber 106 is provided between the main oil chamber 105 and the working chamber 103 of the thrust plate 201. The return oil chamber 106 is connected to the working chamber 103 through oil inlets 102 located on the left and right sides of the oil outlet 101. The oil inlets 102 are located on the outer shell of the thrust plate 201 in the circumferential direction. The return oil chamber 106 is connected to the main oil chamber 105 through a return oil port 104, and the return oil chamber 106 is also connected to the first cavity 8 and the second cavity 9 respectively. Figure 4 As shown, during the rotation of the thrust disk 201, the lubricating oil can be placed on the inner wall of the outer casing under the action of centrifugal force, and eventually flow downward along the inner wall of the outer casing, entering the return oil chamber 106 from the oil inlet hole 102 to complete the return of the lubricating oil.

[0066] Furthermore, the outer casing has a first annular groove 107 and a second annular groove 108 on the inner wall of the first cavity 8. The first annular groove 107 is semi-annular, and the second annular groove 108 is fully annular. The first annular groove 107 communicates with the second oil hole 502, allowing lubricating oil to enter the first annular groove 107 and flow within the semi-annular groove. Additionally, the support bearing 10 installed in the first cavity 8 has a third oil hole 1001 on its circumference, communicating with the first annular groove 107, allowing lubricating oil to enter the gap between the support bearing 10 and the thrust shaft 2. After lubrication is completed, the lubricating oil moves axially into the second annular groove 108, which communicates with the lower oil return chamber 106, thereby completing the lubricating oil return process in the first cavity 8.

[0067] Specifically, at least one first oil hole 501 is provided on the top of the outer casing and on both sides of the oil scraper 6. The lubricating oil scraped from the oil scraper 6 can enter the interior of the outer casing through the first oil hole 501. The first oil hole 501 is connected to the second oil groove 301 opened on the outer wall of the collar 3. In this example, there are two first oil holes 501 on the same side of the oil scraper 6, and a total of four are provided. They are distributed in pairs for entering the thrust plate 201 in two different directions, so that the thrust plate 201 can achieve the effect of scraping oil when rotating clockwise or counterclockwise.

[0068] Specifically, a second oil hole 502 is provided inside the outer shell, which connects the first oil groove 503 to the first cavity 8. At least two second oil holes 502 are provided and are symmetrically distributed in the outer shell relative to the thrust plate 201. In this example, the second oil holes 502 are inclined towards the first cavity 8 to improve the flow effect of lubricating oil.

[0069] Specifically, it also includes a top cover 7, which is installed on the top of the outer casing, and the oil scraper 6 is fixedly connected to the top cover 7. In this example, the oil scraper 6 and the top cover 7 are connected by bolts.

[0070] Specifically, the bottom surface of the oil scraper 6 is a concave arc surface, and the oil scraper 6 has downwardly inclined scraping parts 603 formed at both ends. The distance between the end of the scraping part 603 and the outer wall of the thrust plate 201 is smaller than the gap between the thrust plate 201 and the outer shell, so as to efficiently scrape the lubricating oil adhering to the outer wall of the thrust plate 201 using the scraping part 603.

[0071] In this thrust bearing self-lubricating system, the thrust shaft 2 rotates, causing the thrust disk 201 to rotate. During the rotation of the thrust disk 201, a negative pressure is formed at the oil outlet 101 of the main oil chamber 105, causing the lubricating oil in the main oil chamber 105 to be adsorbed onto the outer wall of the thrust disk 201 under the pump suction. When the lubricating oil moves with the thrust disk 201 to the position of the scraper 6, the scraper 6 can scrape the lubricating oil, allowing the lubricating oil to be discharged from the oil inlet channel 601 of the scraper 6 to the oil outlets 602 on both sides. The discharged lubricating oil passes through the first oil hole 50. The lubricating oil enters the second oil groove 301 on the outer wall of the collar 3, flows along the second oil groove 301 to the end of the collar 3, and then flows downward to the first oil groove 503 on the inner wall of the outer shell. As the lubricating oil flows downward, some of it enters the first cavity 8 where the support bearing 10 is located through the second oil hole 502 to lubricate the support bearing 10. Another portion of the lubricating oil flows downward through the through groove 401 and enters the second cavity 9 under the action of the rotating thrust plate 201 to lubricate the thrust bearing. The lubricating oil exiting from the two cavities passes through the return oil cavity 106 and then enters the main oil chamber 105. After being cooled by the cooling system installed in the main oil chamber 105 (this cooling system is a conventional cooling method in the prior art and will not be described in detail here), it continues to be adsorbed onto the outer wall of the thrust plate 201 under the pump suction, thus achieving the overall self-lubricating operation of the system.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A thrust bearing self-lubricating system characterized by, include: The outer casing has a first oil groove (503) on its inner wall. A thrust shaft (2) is rotatably mounted inside the housing, and a first cavity (8) for mounting a support bearing is formed between the thrust shaft (2) and the housing; the middle part of the thrust shaft (2) has a thrust disk (201) extending in the radial direction, and a gap is formed between the thrust disk (201) and the inner wall of the housing; There are two collars (3) and they are fixedly installed inside the outer shell. A second cavity (9) for installing the thrust bearing is formed between the collar (3) and the thrust plate (201). A second oil groove (301) is provided on the collar (3). The oil scraper (6) is located at the top of the outer shell and is positioned directly above the thrust plate (201). The oil scraper (6) has oil inlet channels (601) at both ends above. The oil outlet (602) of each oil inlet channel (601) extends to both sides of the oil scraper (6) and penetrates the side wall of the oil scraper (6). When the thrust plate (201) rotates, the scraper (6) can scrape the lubricating oil on the outer wall of the thrust plate (201). After the lubricating oil enters the oil inlet channel (601), it is discharged from the oil outlet end (602) of the scraper (6) and passes through the outer shell into the second oil groove (301). After passing through the first oil groove (503), it enters the first cavity (8) and the second cavity (9) respectively, thus achieving the self-lubricating effect on the support bearing and the thrust bearing.

2. A self-lubricating system for a thrust bearing according to claim 1, characterized in that, It also includes two side plates (4), which are installed on the outside of the two collars (3) respectively. The outer wall of the side plate (4) is in contact with the inner wall of the outer shell. A through groove (401) is opened on the surface of the side plate (4) through its thickness direction. The through groove (401) is connected to the first oil groove (503) on the inner wall of the outer shell, and the through groove (401) is connected to the second cavity (9).

3. A self-lubricating system for a thrust bearing according to claim 1, wherein, The bottom of the outer casing is provided with a main oil chamber (105). The upper part of the main oil chamber (105) is connected to the working chamber (103) of the thrust plate (201) through an oil outlet (101). When the thrust plate (201) rotates with the thrust shaft (2), the lubricating oil in the main oil chamber (105) can be sucked into the gap between the thrust plate (201) and the outer casing under the pump suction effect.

4. A self-lubricating system for a thrust bearing according to claim 3, wherein A return oil chamber (106) is provided between the main oil chamber (105) and the working chamber (103) of the thrust plate (201). The return oil chamber (106) is connected to the working chamber (103) through the oil inlets (102) located on the left and right sides of the oil outlet (101). The oil inlets (102) are opened on the outer shell of the thrust plate (201) in the circumferential direction. The return oil chamber (106) is connected to the main oil chamber (105) through the return oil port (104), and the return oil chamber (106) is connected to the first cavity (8) and the second cavity (9) respectively.

5. A self-lubricating system for a thrust bearing according to claim 1, wherein, At least one first oil hole (501) is provided on the top of the outer casing and on both sides of the oil scraper (6), so that the lubricating oil scraped from the oil scraper (6) can enter the interior of the outer casing through the first oil hole (501).

6. A thrust bearing self-lubricating system according to claim 5, characterized in that, The first oil hole (501) is connected to the second oil groove (301) opened on the outer wall of the collar (3).

7. A self-lubricating system for a thrust bearing according to claim 1, wherein The outer shell has a second oil hole (502) inside, which connects the first oil groove (503) to the first cavity (8).

8. A thrust bearing self-lubricating system according to claim 1, characterized in that, It also includes a top cover (7), which is installed on the top of the outer casing, and the oil scraper (6) is fixedly connected to the top cover (7).

9. A self-lubricating system for a thrust bearing according to claim 1, wherein, The bottom surface of the oil scraper (6) is a concave arc surface, and the two ends of the oil scraper (6) are formed with downwardly inclined scraping parts (603). The distance between the end of the scraping part (603) and the outer wall of the thrust plate (201) is smaller than the gap between the thrust plate (201) and the outer shell.

10. A self-lubricating system for a thrust bearing according to claim 1, wherein, The outer shell includes an upper shell (5) and a lower shell (1), which are fixedly connected.

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