Turntable bearing with cooling function used in special field

Abstract

The utility model relates to a turntable bearing with a cooling function, which is used in the special field, and effectively solves the problems in the prior art that the performance of the whole machine is reduced and even faults occur due to the lack of effective cooling measures under high temperature or extreme conditions of the traditional turntable bearing, and the damage of corrosive gas to the bearing in a special environment. The turntable bearing comprises an outer ring, an inner ring and a seat ring, the outer ring is arranged on the outer diameter face of the inner ring in a sleeving mode and fixed to the top end of the seat ring through a connecting piece, a first sealing ring is installed between the outer ring and the inner ring, a second sealing ring is installed between the inner ring and the seat ring, a first cooling groove is formed in the inner diameter face of the inner ring, and a second cooling groove is formed in the lower end of the seat ring. According to the bearing, heat generated when machines around the bearing work can be effectively reduced, the situation that the whole machine breaks down due to high temperature is prevented, and meanwhile damage of corrosive gas to the interior of the bearing is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing design, in particular to a turntable bearing with a cooling function used in special fields. Background Art

[0002] As a specialized large-scale bearing, slewing bearings are widely used in a variety of fields, including wind energy, engineering machinery, medical equipment, the nuclear industry, and food processing, due to their ability to simultaneously withstand large combined loads, including axial loads, radial loads, and overturning moments. With the development of science and technology, the application range of slewing bearings continues to expand, and the requirements for specific application environments are becoming increasingly complex. For example, in equipment operating under certain high temperatures or extreme conditions, slewing bearings must not only have basic load-bearing capacity but also possess additional functions to adapt to specific operating conditions.

[0003] For slewing bearings operating in challenging environments, cooling is an essential design element. Without proper cooling measures, the bearing's external temperature can overheat in high-temperature environments, impacting overall performance and even leading to failure. Furthermore, the presence of corrosive gases in certain environments can also damage bearings, necessitating not only a robust cooling system but also appropriate corrosion resistance. Utility Model Content

[0004] In order to achieve the above-mentioned purpose, the utility model provides a turntable bearing with a cooling function for use in special fields.

[0005] The technical solution adopted by the present invention is: a turntable bearing with a cooling function used in special fields, comprising an outer ring, an inner ring, and a seat ring, the outer ring being sleeved on the outer diameter surface of the inner ring and fixed to the top of the seat ring through a connecting piece, a first sealing ring being installed between the upper end surface of the outer ring and the inner ring, a second sealing ring being installed between the inner ring and the upper end surface of the seat ring, a first cooling groove being provided inside the inner diameter surface of the inner ring, a second cooling groove being provided inside the lower end of the seat ring, and two second cooling groove inlet and outlet water holes connected to the second cooling groove being provided on the outer diameter surface of the seat ring.

[0006] As a preferred embodiment, the first cooling groove is composed of a first annular groove arranged on the inner diameter surface of the inner ring and an isolation plate outside the inner diameter surface of the inner ring, and the second cooling groove is composed of a second isolation plate arranged on the lower end of the seat ring and a second annular groove arranged on the lower end of the seat ring, and the heat pipe is surrounded and arranged inside the second cooling groove.

[0007] As a preferred solution, the upper end of the inner ring is provided with a first cooling trough water inlet and a first cooling trough water outlet leading to the first cooling trough.

[0008] As a preferred solution, two guide steel bars of different lengths for guiding the cooling medium are provided on both sides of the cooling trough water inlet. The longer guide steel bar is arranged between the cooling trough water inlet and the cooling trough water outlet and divides and closes the first cooling trough. One end of the shorter guide steel bar closes the upper end of the first cooling trough, and a gap is left between the other end and the bottom of the first cooling trough for the cooling medium to flow.

[0009] As a preferred solution, at least two plug holes for installing outer ring plugs are provided on the outer diameter surface of the outer ring and the plug holes are not located in the same section. A tapered pin hole for installing an internally threaded tapered pin is also provided on the outer ring end face of the section where the plug holes are located.

[0010] As a preferred embodiment, the outer diameter surface of the outer ring is provided with a plurality of first grease injection holes for injecting grease into the bearing cavity where the roller is located. The connection between the seat ring and the inner ring is a labyrinth sealing structure, and the outer diameter surface of the seat ring is provided with second grease injection holes for injecting grease into the labyrinth sealing structure.

[0011] As a preferred solution, the first grease injection hole, the second grease injection hole and the second cooling groove water inlet and outlet holes are all located in different cross sections of the seat ring.

[0012] As a preferred solution, the second cooling cavity is provided with a cylindrical notch between the cooling slot through holes, the diameter of which is larger than the width of the second cooling cavity, and a cylindrical block for unidirectionally guiding the cooling medium is provided in the cylindrical notch.

[0013] As a preferred solution, the upper end of the outer ring is provided with a flange structure for fixing the bearing, and a distance is provided between the flange structure and the upper end face of the outer ring to avoid interference of bolts.

[0014] As a preferred solution, an outer O-ring and an inner O-ring are provided between the inner ring and the seat ring from the outside to the inside for preventing impurities from invading the interior of the bearing.

[0015] The beneficial effects of the utility model are:

[0016] Based on the shortcomings of the existing technology, the utility model provides a slewing bearing with a cooling function for use in special fields. By optimizing the structural design, the utility model has the following technical effects:

[0017] First, a first annular groove is defined within the inner diameter of the inner ring. A separator plate is fixed to the inner diameter of the inner ring, forming a first cooling groove with the first annular groove. A second annular groove is defined at the lower end of the seat ring for accommodating the heat pipe to be cooled. A second separator plate is also located at the lower end of the seat ring, forming a second cooling groove with the second annular groove. By providing these first and second cooling grooves and circulating cooling medium within these grooves, heat generated by the machinery surrounding the bearing during operation can be effectively reduced, preventing overall machine failure due to high temperatures. Furthermore, the annular cooling cavity structure and the placement of water inlet and outlet holes ensure effective circulation and even distribution of the cooling medium, improving cooling efficiency.

[0018] Secondly, two guide steel bars of different lengths are provided on both sides of the water inlet of the cooling trough in the first cooling trough, and a cylindrical block for unidirectionally guiding the cooling medium is installed in the cylindrical notch provided in the second cooling trough. This design can guide the cooling medium to flow in the expected direction, prevent direct backflow of the cooling medium, prevent short-circuit flow, ensure that the cooling medium can fill the entire cooling trough, improve the cooling effect and cooling efficiency, and by providing shorter guide steel bars, ensure that the cooling medium entering the first cooling trough can flow fully, preventing the cooling efficiency from being inconsistent due to part of the cooling medium entering not flowing.

[0019] Third, a first sealing ring is installed between the upper end face of the outer ring and the inner ring, a second sealing ring is installed between the inner ring and the upper end face of the seat ring, the connection between the seat ring and the inner ring is a labyrinth sealing structure, and a plurality of first grease injection holes are provided on the outer diameter surface of the outer ring for injecting grease into the bearing cavity where the roller is located, and a second grease injection hole is provided on the outer diameter surface of the seat ring for injecting grease into the labyrinth sealing structure. By arranging the combination of the first sealing ring, the second sealing ring, the labyrinth sealing structure and the grease injection holes, a multi-layer protection system is effectively constructed, in which the sealing ring prevents the invasion of external impurities and corrosive gases, while the grease injection holes allow grease to be injected into the labyrinth sealing structure to further isolate the corrosive gases. The design of the labyrinth sealing structure not only enhances the sealing effect, but also blocks the direct contact of corrosive gases through the complex channel structure. The synergistic effect of the three significantly improves the ability of the bearing to resist corrosion, ensures that the internal components of the bearing are protected from damage, and extends the service life of the bearing.

[0020] Fourthly, in the second cooling tank, by surrounding the pipes that need to dissipate heat in the second cooling tank and using two inlet and outlet holes to circulate the coolant, effective heat dissipation of the heat pipe is achieved. This design not only ensures the uniform distribution of the coolant and efficient heat exchange, but also effectively reduces the overall operating temperature of the bearing, ensuring the stable operation of the bearing and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 - Figure 4 It is a cross-sectional view showing the positions of various components in the present invention;

[0023] Figure 5 This is a schematic diagram of the annular cooling groove 1 of the bearing in the present invention;

[0024] Figure 6 This is a schematic diagram of the annular cooling groove 2 of the bearing in the present invention;

[0025] In the figure: 1. Outer ring; 2. Inner ring; 201. Inner ring flange part; 3. Seat ring; 4. Roller; 5. First sealing ring; 6. Second sealing ring; 7. Mounting hole; 8. Outer O-ring; 9. Inner O-ring; 10. First cooling trough water inlet; 11. First cooling trough water outlet; 12. First grease injection hole; 13. Second cooling trough water inlet and outlet; 14. Isolation plate; 15. Second grease injection hole; 16. Plug hole; 17. Internally threaded conical pin; 18. Labyrinth seal structure; 19. Connector; 20. First cooling trough; 21. Second cooling trough; 22. Heat pipe; 23. Cylindrical block; 24. Guide steel bar. DETAILED DESCRIPTION

[0026] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may also be beneficially combined in other embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons having ordinary skills in the field to which the present invention belongs. The words "one", "an", "the" and the like used in the specification and claims of the present utility model patent application do not express a quantitative limitation, but rather indicate the presence of at least one; words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.

[0028] In order to more clearly describe the specific structural composition of the slewing bearing with cooling function used in this special field, Figure 1 - Attachment Figure 6 Describe this embodiment:

[0029] like Figure 1 As shown, the slewing bearing primarily consists of an outer ring 1, an inner ring 2, a raceway 3, rollers 4, spacers, a spacer plate 14, and a sealing ring. The inner diameter surface of the outer ring 1 features two rows of mutually perpendicular annular grooves, while the outer diameter surface of the inner ring 2 features annular grooves of the same size and height as the outer ring 1. The rollers 4 and spacers are staggered between the inner and outer ring grooves. This staggered arrangement effectively distributes the load, improving the bearing's load-bearing capacity and service life. A first sealing ring 5 is installed at the junction between the upper end of the outer ring 1 and the inner ring 2. A second sealing ring 6 is installed between the upper end of the inner ring 2 and the raceway 3. A labyrinth seal 18 is used at the junction between the lower ends of the inner ring 2 and the raceway 3. This sealing structure not only prevents external impurities and corrosive gases from entering the bearing interior, but also maintains internal cleanliness, reducing wear and maintenance frequency. Furthermore, a certain distance is set between the lower end of the inner ring flange 201 and the upper end of the outer ring 1. This distance is determined by the height of the bolt heads connecting the bearing to prevent interference. The first sealing ring 5, located at the junction of the upper end of the roller 4 and the inner and outer rings, prevents impurities from entering the bearing cavity, thereby maintaining internal bearing cleanliness. The second sealing ring 6, located at the lower end of the roller 4 and at the junction of the inner ring 2 and the seat ring 3, further enhances sealing performance through the labyrinth seal structure 18, effectively isolating corrosive gases and protecting internal components from damage.

[0030] like Figure 2As shown, the outer O-ring 8 and inner O-ring 9 are located on either side of the hole. This design prevents impurities from entering the bearing cavity, further enhancing the bearing's sealing performance and ensuring normal operation in harsh environments. The first cooling trough inlet 10 and the first cooling trough outlet 11 are located on the inner ring flange 201. This ensures the flow of coolant within the first cooling trough 20 formed at the junction of the inner ring 2 and the isolation plate 14, effectively reducing heat generated during operation of the bearing's external machinery and improving the overall operating efficiency and lifespan. In the second cooling trough 21 at the lower end of the seat ring 3, two second cooling trough inlet and outlet holes 13 are also located to ensure the flow of coolant, achieving an effective cooling effect. Furthermore, several evenly distributed first grease injection holes 12 are drilled above the rolling element, extending from the outer diameter of the outer ring 1. Grease is injected into the bearing cavity through these first grease injection holes 12, ensuring internal lubrication and maintaining a certain pressure within the cavity, controlling the downward pressure of the second sealing ring 6 and ensuring a good sealing effect. At the same time, the first grease injection hole 12 and the second cooling tank inlet and outlet holes 13 should not be located in the same cross-section of the seat ring 3 to prevent the wall from being too thin and thus reducing strength, thereby ensuring structural stability. In addition, filling the second sealing ring 6 and the labyrinth seal structure 18 with grease through the first grease injection hole 12 can prevent toxic gases from corroding the sealing ring, further extending the service life of the sealing ring.

[0031] like Figure 3 As shown, plug holes 16 are provided in the raceway of outer ring 1 for installing the outer ring plugs. A tapered pin hole is provided above plug hole 16 on the end face of outer ring 1 for installing an internally threaded tapered pin 17. Tapered pin 17 connects outer ring 1 and seat ring 3, not only providing positioning but also ensuring a secure connection between outer ring 1 and seat ring 3. Plug holes 16 and plug holes 16 are not located on the same cross section and are staggered to ensure the strength of the ferrule at that cross section and avoid problems caused by localized stress concentration. Furthermore, a labyrinth seal structure 18 is provided at the connection between seat ring 3 and inner ring 2. This structure prevents the ingress of external impurities through throttling and effectively isolates large amounts of corrosive gases, thereby improving the durability and reliability of the bearing.

[0032] like Figure 4 As shown, the connecting screws 19 are used to connect the outer ring 1 and the seat ring 3 to ensure a firm connection between the two. The inner ring 2 is connected to the isolation plate 14 by welding, and a first cooling groove 20 is formed inside. Figure 6As shown, in the first cooling trough 20, two guide steel bars 24 of different lengths are welded respectively. The long steel bar 24 seals the cooling trough, and a portion of the short steel bar 24 flows out from the lower end. This design is conducive to the uniform distribution of the coolant. At the same time, the first cooling trough water inlet 10 is set in the middle position between the two steel bars, and the first cooling trough water outlet 11 is set at the rear end of the long steel bar 24. After the coolant enters the cooling trough from the water inlet at the upper end, since the long steel bar 24 seals one side, the coolant can only flow in one direction from the lower end of the short steel bar 24, filling the cooling trough, and then flowing out from the water outlet on the rear side of the long steel bar 24, ensuring that the coolant can evenly cover the entire cooling trough and improve the cooling effect. The cavity after welding needs to be subjected to a pressure test to verify the welding quality and ensure the safety and reliability of the cooling system.

[0033] Similarly, if Figure 5 As shown, a circular hole with a larger diameter than the groove is positioned in the middle of the second cooling groove 21 at the lower end of the seat ring 3. A cylindrical block 23 that matches the circular hole is placed in the middle. The two second cooling groove inlet and outlet holes 13 are symmetrically distributed on both sides of the cylindrical block 23. This design can achieve a one-way flow guide effect, ensuring sufficient renewal of the coolant and improving cooling efficiency. A heat pipe 22 is placed around the interior of the second cooling groove 21. The coolant flowing in the second cooling groove 21 can cool the heat pipe 22. In actual use, the heat pipe 22 to be cooled is surrounded by the second cooling groove 21, which can achieve a good cooling effect and ensure the normal operation of the system.

[0034] It should be noted that although the present invention has been described through the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and modifications to the present invention, and such changes and modifications shall fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A slewing bearing with a cooling function used in special fields, comprising an outer ring (1), an inner ring (2), and a seat ring (3), characterized in that: The outer ring (1) is sleeved on the outer diameter surface of the inner ring (2) and fixed to the top of the seat ring (3) through a connecting piece (19); a first sealing ring (5) is installed between the upper end surface of the outer ring (1) and the inner ring (2); a second sealing ring (6) is installed between the inner ring (2) and the upper end surface of the seat ring (3); a first cooling groove (20) is provided inside the inner diameter surface of the inner ring (2); a second cooling groove (21) is provided inside the lower end of the seat ring (3); and two second cooling groove inlet and outlet water holes (13) connected to the second cooling groove (21) are provided on the outer diameter surface of the seat ring (3).

2. The slewing bearing with cooling function used in special fields according to claim 1, characterized in that: The first cooling groove (20) is composed of a first annular groove arranged in the inner diameter surface of the inner ring (2) and an isolation plate (14) outside the inner diameter surface of the inner ring (2); the second cooling groove (21) is composed of a second isolation plate arranged at the lower end of the seat ring (3) and a second annular groove arranged at the lower end of the seat ring (3); and the heat pipe (22) is arranged around the inside of the second cooling groove (21).

3. The slewing bearing with cooling function used in special fields according to claim 1, characterized in that: The upper end of the inner ring (2) is provided with a first cooling groove water inlet (10) and a first cooling groove water outlet (11) leading to the first cooling groove (20).

4. The slewing bearing with cooling function used in special fields according to claim 3, characterized in that: Two guide steel bars (24) of different lengths for guiding the cooling medium are provided on both sides of the first cooling trough water inlet (10). The longer guide steel bar (24) is provided between the first cooling trough water inlet (10) and the first cooling trough water outlet (11) and divides and closes the first cooling trough (20). One end of the shorter guide steel bar (24) closes the upper end of the first cooling trough (20), and a gap is left between the other end and the bottom of the first cooling trough (20) for the cooling medium to flow.

5. The slewing bearing with cooling function used in special fields according to claim 1, characterized in that: At least two plug holes (16) for installing outer ring plugs are provided on the outer diameter surface of the outer ring (1), and the plug holes (16) are not located in the same cross section. A tapered pin hole for installing an internally threaded tapered pin (17) is also provided on the end face of the outer ring (1) in the cross section where the plug holes (16) are located.

6. The slewing bearing with cooling function used in special fields according to claim 1, characterized in that: The outer diameter surface of the outer ring (1) is provided with a plurality of first grease injection holes (12) for injecting grease into the bearing cavity where the roller (4) is located. The connection between the seat ring (3) and the inner ring (2) is a labyrinth seal structure (18). The outer diameter surface of the seat ring (3) is provided with second grease injection holes (15) for injecting grease into the labyrinth seal structure (18).

7. The slewing bearing with cooling function used in special fields according to claim 6, characterized in that: The first grease injection hole (12), the second grease injection hole (15), and the second cooling groove water inlet and outlet holes (13) are located at different cross sections of the seat ring (3).

8. The slewing bearing with cooling function used in special fields according to claim 1, characterized in that: A cylindrical notch having a diameter greater than the width of the second cooling groove (21) is provided between the water inlet and outlet holes (13) of the second cooling groove, and a cylindrical block (23) for unidirectionally guiding the cooling medium is provided in the cylindrical notch.

9. The slewing bearing with cooling function used in special fields according to claim 1, characterized in that: The upper end of the outer ring (1) is provided with an inner ring flange (201) structure for fixing the bearing, and a distance exists between the inner ring flange (201) and the upper end surface of the outer ring (1) to avoid interference of bolts.

10. The slewing bearing with cooling function used in special fields according to claim 1, characterized in that: An outer O-type sealing ring (8) and an inner O-type sealing ring (9) are provided between the inner ring (2) and the seat ring (3) from the outside to the inside for preventing impurities from invading the interior of the bearing.

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