Radial thrust bearing
By setting up large and small thrust discs in the thrust bearing to form independent oil supply chambers, and using bellows or wire tube cooling pipes, the problems of uneven oil supply and large space occupation of the cooler are solved, achieving uniform oil supply and efficient cooling, and reducing the size of the bearing.
Patent Information
- Application Number
- CN202520533719.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Existing thrust bearings suffer from uneven oil supply during lubrication and cooling, and the cooling pipes of the cooler occupy a large space, making them unsuitable for space-constrained locations.
A radial thrust bearing was designed, which uses a large thrust plate and a small thrust plate to form a large oil inlet chamber and a small oil inlet chamber respectively, which supply oil to the thrust bearing and the radial bearing respectively. Corrugated pipes or wire tubes are used as cooling pipes to increase the contact area and improve the cooling efficiency.
It achieves uniform oil supply, good cooling effect, reduces bearing size, and expands the range of applications.
Smart Images
Figure CN223648347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to radial thrust bearings, specifically a type of radial thrust bearing. Background Technology
[0002] Thrust bearings are primarily used to withstand axial loads. For example, in water turbines or steam turbines, the shaft is subjected to significant axial forces, and thrust bearings play a crucial role in this situation. Thrust bearing pads and radial bearing pads are key components, responsible for bearing loads and reducing friction. Lubrication and cooling are critical for the proper functioning of the bearing; otherwise, friction will generate excessive heat, leading to component damage.
[0003] In the existing technology, the thrust bearing and radial bearing are lubricated and cooled by slotting the outer circle of a thrust disc. The thrust disc rotates with the shaft, and during the rotation, oil is drawn from the oil groove and supplied to the thrust bearing and radial bearing through two pipelines. However, in actual use, uneven oil supply often occurs. Once uneven oil supply occurs, the lubrication and cooling of the thrust bearing or radial bearing will be inadequate.
[0004] Secondly, in existing technologies, the cooling tubes in oil coolers are all bare tubes, and the contact area between the bare tube and the oil is limited. Therefore, to ensure the required cooling efficiency, the length of the bare tube must be increased to improve the contact area. However, this results in a larger overall thrust bearing size, occupying more space and making it unsuitable for space-constrained applications. Therefore, a radial thrust bearing is proposed. Utility Model Content
[0005] The purpose of this invention is to provide a radial thrust bearing to solve the above problems.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a radial thrust bearing, comprising a bearing housing, an end cover mounted on the bearing housing, a bearing cap mounted on the end cover, and a radial bearing shell mounted between the bearing housing and the bearing cap; an oil cavity is provided between the bearing housing and the bearing cap; characterized in that it further comprises a large thrust plate and a small thrust plate disposed on both sides of the radial bearing shell, a large oil groove mounted on the large thrust plate, a small oil groove mounted on the small thrust plate, and a large oil inlet cover and a small oil inlet cover mounted on the radial bearing shell and surrounding the large thrust plate; a large oil inlet cavity is formed between the large oil inlet cover, the large oil groove, and the radial bearing shell, and a small oil inlet cavity is formed between the small oil inlet cover, the small oil groove, and the radial bearing shell; a large oil inlet channel communicating with the large oil inlet cavity is provided on the radial bearing shell, and a small oil inlet channel is also provided on the radial bearing shell, with an oil guide pipe connected to the small oil inlet cavity.
[0007] Further preferably, it also includes a large oil inlet pipe that communicates with the large oil inlet chamber and the inner oil chamber of the bearing housing, and a small oil inlet pipe that communicates with the small oil inlet chamber and the inner oil chamber of the bearing housing.
[0008] Further preferably, it also includes a large spring seat mounted on the large oil inlet cover and connected to the large oil inlet pipe, a small spring seat mounted on the small oil inlet cover and connected to the small oil inlet pipe, and a spring fitted on the large spring seat and the small spring seat and located between the large spring seat, the small spring seat and the bearing seat.
[0009] A further preferred embodiment includes a thrust bearing installed between the radial bearing and the large thrust disk, wherein an oil return chamber is formed between the thrust bearing, the large thrust disk and the large oil inlet cover, and the oil return chamber is connected to the oil chamber.
[0010] A further preferred embodiment includes an oil outlet channel disposed on the radial tile and communicating with the oil cavity.
[0011] A further preferred embodiment includes a cooler mounted on a bearing housing, the cooler having a plurality of cooling pipes mounted thereon.
[0012] More preferably, the cooling pipe is a corrugated pipe or a wire-reinforced pipe.
[0013] More preferably, both the large and small oil troughs are provided with several oil troughs.
[0014] The beneficial effects of this utility model are as follows: This device sets a large thrust plate and a small thrust plate on both sides of the radial bearing to form a large oil inlet chamber and a small oil inlet chamber respectively, so as to supply oil to the thrust bearing and the radial bearing separately, so that the oil supply is uniform and there will be no uneven oil supply.
[0015] By using corrugated or wire-tightened tubes for some of the cooling pipes in the cooler, the contact area between the cooling pipes and the oil is increased, the heat exchange rate is more efficient, and the cooling effect is better. While achieving the basic cooling effect, the length of the cooling pipes can be reduced, thereby reducing the overall volume of the bearing and expanding its applicability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;
[0018] Figure 3 This is a partial structural schematic diagram of the present invention.
[0019] Legend: 1. Bearing housing; 11. Oil chamber; 2. End cover; 3. Bearing cover; 4. Radial bearing; 41. Oil outlet channel; 5. Large thrust plate; 51. Large oil groove; 52. Large oil inlet chamber; 53. Large oil inlet channel; 54. Large oil inlet pipe; 55. Large spring seat; 56. Large oil inlet cover; 6. Small thrust plate; 61. Small oil groove; 62. Small oil inlet chamber; 63. Small oil inlet channel; 64. Guide pipe; 65. Small oil inlet pipe; 66. Small spring seat; 67. Spring; 68. Small oil inlet cover; 7. Return oil chamber; 8. Thrust bearing; 9. Cooler; 91. Cooling pipe; 10. Oil groove. Detailed Implementation
[0020] The radial thrust bearing of this utility model will now be further described in conjunction with the accompanying drawings.
[0021] It should be noted that all directional indicators such as up, down, left, right, front, back, etc. in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.
[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can also mean a mechanical connection, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0023] See Figures 1-3 As shown, a radial thrust bearing includes a bearing housing 1, an end cover 2 mounted on the bearing housing 1, a bearing cover 3 mounted on the end cover 2, and a radial bearing 4 installed between the bearing housing 1 and the bearing cover 3; an oil cavity 11 is provided between the bearing housing 1 and the bearing cover 3; characterized in that it also includes a large thrust plate 5 and a small thrust plate 6 disposed on both sides of the radial bearing 4, a large oil groove 51 mounted on the large thrust plate 5, a small oil groove mounted on the small thrust plate 6, and a large oil inlet cover and a small oil inlet cover mounted on the radial bearing 4 and surrounding the large thrust plate 5 and surrounding the small thrust plate 6; a large oil inlet cavity 52 is formed between the large oil inlet cover, the large oil groove 51 and the radial bearing 4, and a small oil inlet cavity 62 is formed between the small oil inlet cover, the small oil groove and the radial bearing 4; a large oil inlet channel 53 communicating with the large oil inlet cavity 52 is provided on the radial bearing 4, and a small oil inlet channel 63 is also provided on the radial bearing 4, and an oil guide pipe 64 is connected to the small oil inlet cavity 62 via the small oil inlet channel 63.
[0024] This device sets up a large thrust plate 5 and a small thrust plate 6 on both sides of the radial bearing 4, forming a large oil inlet chamber 52 and a small oil inlet chamber 62 respectively, which separately supply oil to the thrust bearing 8 and the radial bearing 4, ensuring uniform oil supply and preventing uneven oil supply.
[0025] In one embodiment, it further includes a large oil inlet pipe 54 communicating with the large oil inlet chamber 52 and the inner oil chamber 11 of the bearing housing 1, and a small oil inlet pipe 65 communicating with the small oil inlet chamber 62 and the inner oil chamber 11 of the bearing housing 1; the large oil inlet pipe 54 is used to introduce oil into the thrust bearing 8 to lubricate and cool the thrust bearing 8, and the small oil inlet pipe 65 is used to introduce oil into the radial bearing 4 to lubricate and cool the radial bearing 4, so as to achieve separate cooling.
[0026] In one embodiment, an oil outlet channel 41 is provided on the radial tile 4 and communicates with the oil cavity 11. The oil outlet channel 41 is used to return the oil after lubricating and cooling the radial tile 4 to the oil cavity 11.
[0027] In one embodiment, it further includes a large spring seat 55 mounted on the large oil inlet cover and connected to the large oil inlet pipe 54, a small spring seat 66 mounted on the small oil inlet cover and connected to the small oil inlet pipe 65, and a spring 67 fitted on the large spring seat 55 and the small spring seat 66 and located between the large spring seat 55, the small spring seat 66 and the bearing seat 1; the arrangement of the large spring seat 55, the small spring seat 66 and the spring 67 provides an elastic buffering effect.
[0028] In one embodiment, a thrust bearing 8 is also included, which is installed between the radial bearing 4 and the large thrust disk 5. An oil return chamber 7 is formed between the thrust bearing 8, the large thrust disk 5 and the large oil inlet cover. The oil return chamber 7 is connected to the oil chamber 11. After the oil is used to lubricate and cool the thrust bearing 8, it moves to the oil return chamber 7 and overflows back into the oil chamber 7.
[0029] In one embodiment, a cooler 9 is mounted on the bearing housing 1, and the cooler 9 is equipped with a plurality of cooling pipes 91.
[0030] The cooling pipe 91 is a corrugated pipe or a wire-reinforced pipe;
[0031] By using corrugated pipes or wire-tied pipes for several cooling pipes 91 in the cooler 9, the contact area between the cooling pipes 91 and the oil is increased, the heat exchange rate is sufficient, and the cooling effect is good. Under the condition of achieving the basic cooling effect, the length of the cooling pipes 91 can be reduced, thereby reducing the volume of the entire bearing and thus improving the applicability.
[0032] More preferably, both the large oil trough 51 and the small oil trough 61 are provided with a plurality of oil troughs 10. When the large oil trough 51 and the small oil trough 61 rotate, the oil is drawn into the large oil inlet chamber 52 and the small oil inlet chamber 62 through the plurality of oil troughs 10 via the large oil inlet pipe 54 and the small oil inlet pipe 65.
[0033] When this utility model is in use: when the shaft is rotating, the shaft drives the large thrust disk 5 and the small thrust disk 6 to rotate accordingly. During the rotation of the large thrust disk 5, the large oil inlet ring is driven to rotate. During the rotation of the large oil inlet ring, the oil in the oil chamber 11 is sucked into the large oil inlet chamber 52 through the large oil inlet pipe 54. Then the oil is introduced into the thrust bearing 8 through the large oil inlet channel 53. After the oil lubricates and cools the thrust bearing 8, it flows to the return oil chamber 7. Then it overflows into the oil chamber 11 through the port that connects the return oil chamber 7 and the oil chamber 11.
[0034] When the small thrust plate 6 rotates, it drives the small oil trough 61 to rotate. The small oil trough 61 draws oil into the small oil inlet chamber 62 through the small oil inlet pipe 65. The oil in the small oil inlet chamber 62 then flows through the oil guide pipe 64 into the small oil inlet channel 63 and lubricates and cools the radial bearing 4 along the small oil inlet channel 63. After cooling the radial bearing 4, it overflows into the oil chamber 11 through the oil outlet channel 41 on the radial bearing 4.
[0035] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.
Claims
1. A radial thrust bearing, comprising a bearing housing (1), an end cap (2) mounted on the bearing housing (1), a bearing cover (3) mounted on the end cap (2), and a radial bearing shell (4) mounted between the bearing housing (1) and the bearing cover (3); an oil cavity (11) is provided between the bearing housing (1) and the bearing cover (3); characterized in that... It also includes a large thrust plate (5) and a small thrust plate (6) arranged on both sides of the radial bearing (4), a large oil trough (51) installed on the large thrust plate (5), a small oil trough installed on the small thrust plate (6), a large oil inlet cover (56) installed on the radial bearing (4) and surrounding the large thrust plate (5), and a small oil inlet cover (68) surrounding the small thrust plate (6); a large oil inlet cavity (52) is formed between the large oil inlet cover (56), the large oil trough (51) and the radial bearing (4), and a small oil inlet cavity (62) is formed between the small oil inlet cover (68), the small oil trough (61) and the radial bearing (4); a large oil inlet channel (53) communicating with the large oil inlet cavity (52) is provided on the radial bearing (4), and a small oil inlet channel (63) is also provided on the radial bearing (4), and an oil guide pipe (64) is connected to the small oil inlet cavity (62) via the small oil inlet channel (63).
2. The radial thrust bearing according to claim 1, characterized in that: It also includes a large oil inlet pipe (54) that communicates with the large oil inlet chamber (52) and the inner oil chamber (11) of the bearing housing (1), and a small oil inlet pipe (65) that communicates with the small oil inlet chamber (62) and the inner oil chamber (11) of the bearing housing (1).
3. A radial thrust bearing according to claim 2, characterized in that: It also includes a large spring seat (55) installed on the large oil inlet cover and connected to the large oil inlet pipe (54), a small spring seat (66) installed on the small oil inlet cover and connected to the small oil inlet pipe (65), and a spring (67) fitted on the large spring seat (55) and the small spring seat (66) and located between the large spring seat (55), the small spring seat (66) and the bearing seat (1).
4. A radial thrust bearing according to claim 1, characterized in that: It also includes a thrust bearing (8) installed between the radial bearing (4) and the large thrust plate (5), and an oil return chamber (7) is formed between the thrust bearing (8), the large thrust plate (5) and the large oil inlet cover, and the oil return chamber (7) is connected to the oil chamber (11).
5. A radial thrust bearing according to claim 1, characterized in that: It also includes an oil outlet channel (41) that is provided on the radial tile (4) and communicates with the oil cavity (11).
6. A radial thrust bearing according to claim 1, characterized in that: It also includes a cooler (9) mounted on the bearing housing (1), the cooler (9) being equipped with several cooling pipes (91).
7. A radial thrust bearing according to claim 5, characterized in that: The cooling pipe (91) is a corrugated pipe or a wire-reinforced pipe.
8. A radial thrust bearing according to claim 1, characterized in that: Both the large oil trough (51) and the small oil trough (61) are provided with several oil troughs (10).