A sliding bearing bush structure for a high-speed flywheel

Abstract

The utility model discloses a sliding bearing bush structure for high -speed flywheel, including the bush of installing in the bearing seat, the middle part of bush is shaped with the installation through -hole of central penetration, and the middle part of the left and right two end surfaces of bush is shaped with annular recess, and the left and right two ends of bush all are fixed with the sealing cover, and the left end or right end of bush is covered to sealing cover, and the middle part of sealing cover is shaped with the center through -hole, the wallboard in the below of the installation through -hole of central penetration of bush is shaped with the oil return oil groove of left and right extension, and oil return oil groove communicates with two annular recesses, and the bottom surface middle part of oil return oil groove is shaped with the lower oil outlet through -hole of extending and projecting the bottom surface of bush, it will most oil liquid from oil return oil groove and lower oil outlet through -hole flow, and a small part flows from both ends, and the oil outlet amount of bush both ends is smaller, thereby the impact of oil liquid to bearing end cover is reduced greatly, and the risk of oil leakage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing technology, and more specifically to a sliding bearing bush structure for a high-speed flywheel. Background Technology

[0002] With the development of modern industry, high-speed sliding bearings are increasingly widely used in rotating machinery. High-speed bearings often require a large amount of oil, while their structure is relatively compact, with limited space in the bearing housing and a small gap between the bearing bush and the housing end face. Therefore, the sealing requirements for the bearing end cover are high. If the sealing structure of the bearing end cover is inadequate, oil leakage may occur, affecting the normal operation of the generator.

[0003] The existing high-speed sliding bearings have a structure for mounting the bearing housing as follows: Figure 1 As shown, oil flows out from both ends of the bearing bush. Due to the high speed of the rotor and the small gap between the bearing bush and the bearing housing end, most of the oil will impact the bearing end cover, which can easily cause oil leakage between the bearing end cover and the rotor, and between the bearing end cover and the bearing housing. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sliding bearing bush structure for high-speed flywheels. It allows most of the oil to flow out from the return oil groove and the lower oil outlet hole, with a small portion flowing out from both ends. The oil output at both ends of the bush is relatively small, thereby greatly reducing the impact of the oil on the bearing end cover and reducing the risk of oil leakage.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] A sliding bearing bush structure for a high-speed flywheel includes a bush mounted on a bearing housing. The bush has a central through hole for mounting a rotating shaft formed in its center. Annular grooves are formed in the center of the left and right end faces of the bush. Sealing caps are fixed to both ends of the bush, covering the left or right end of the bush. A central through hole is formed in the center of the sealing cap, corresponding to the mounting through hole.

[0007] A left-right extending oil return groove is formed in the bearing bush below the mounting through hole, and the oil return groove communicates with two annular grooves.

[0008] The bottom surface of the oil return groove has a downward-extending oil outlet hole that extends out of the bottom surface of the bearing bush.

[0009] An external mounting annular groove is formed on the inner sidewall of the outer end of the annular groove. The edge of the sealing cover is inserted into the corresponding external mounting annular groove and fixed to the bearing bush by bolts. The inner end face of the edge of the sealing cover presses against the inner end face of the corresponding external mounting annular groove.

[0010] There is a gap between the outer wall of the sealing cap and the inner wall of the outer mounting annular groove.

[0011] An oil return groove is formed on the lower inner wall of the sealing cap, and the oil return groove communicates with the corresponding annular groove.

[0012] The outstanding effect of this utility model is:

[0013] It allows most of the oil to flow out from the return oil groove and the lower oil outlet hole, with a small portion flowing out from both ends. The oil output at both ends of the bearing bush is relatively small, which greatly reduces the impact of the oil on the bearing end cover and reduces the risk of oil leakage. Attached Figure Description

[0014] Figure 1 This is a partial structural diagram of an existing bearing bush installed in a bearing housing;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention;

[0016] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0017] Figure 4 This is a schematic diagram of a partial structure at the end face of the bearing bush. Detailed implementation method:

[0018] For example, see below. Figures 1 to 4 As shown, a sliding bearing bush structure for a high-speed flywheel includes a bush 10 mounted on a bearing housing 100. The bush 10 has a central through-hole 11 formed in its center, and annular grooves 12 formed in the center of its left and right end faces. The central through-hole 11 extends out of the center of the two annular grooves 12. A rotating shaft 200 is inserted into the central through-hole 11 and the annular grooves 12. Sealing caps 20 are fixed to both ends of the bush 10, covering the left or right end of the bush 10. A central through-hole is formed in the center of each sealing cap 20. The two ends of the rotating shaft 200 extend out of the central through-holes of the two sealing caps 20.

[0019] The wall plate below the through hole 11 at the center of the bearing bush 10 has a left-right extending oil return groove 13, which communicates with two annular grooves 12.

[0020] The bottom surface of the oil return groove 13 is formed with a lower oil outlet hole 14 that extends downward and protrudes from the bottom surface of the bearing bush 10.

[0021] Furthermore, an external mounting annular groove 15 is formed on the inner sidewall at the outer end of the annular groove 12. The edge of the sealing cover 20 is inserted into the corresponding external mounting annular groove 15 and fixedly connected to the bearing bush 10 by bolts. The inner end face of the edge of the sealing cover 20 presses against the inner end face of the corresponding external mounting annular groove 15.

[0022] Furthermore, there is a gap 1 between the outer wall of the sealing cover 20 and the inner wall of the external mounting annular groove 15. An oil return groove 21 is formed on the lower inner wall of the sealing cover 20, and the oil return groove 21 communicates with the corresponding annular groove 12.

[0023] The above structure allows a smaller amount of oil to flow out from the gap 1 to both ends, which can greatly reduce the impact on the bearing end caps at both ends of the bearing housing 100 and reduce the risk of oil leakage.

[0024] Furthermore, the inner wall of the central through hole of the sealing cover 20 is formed with a plurality of inner sealing annular grooves 22, and the inner sealing ring 23 is nested in the corresponding inner sealing annular groove 22. The inner wall of the inner sealing ring 23 is close to the outer wall of the rotating shaft 200 inserted in the central through hole.

[0025] Furthermore, the inner sealing ring 23 is made of copper, and its inner sidewall is a conical wall. All the inner sealing rings 23 form a copper tooth seal. Its inner sidewall is close to the outer sidewall of the rotating shaft 200 inserted in the central through hole, thereby achieving a certain sealing effect (the oil surface will be subject to surface tension, making it difficult for it to flow out from small gaps, because surface tension will try to keep the oil surface flat, thereby preventing the oil from flowing out through small gaps). At the same time, its hardness is less than that of the rotating shaft 200, making the surface of the rotating shaft 200 less prone to wear.

[0026] Furthermore, the cross-section of the oil return groove 13 is waist-shaped.

[0027] Furthermore, three inner sealing annular grooves 22 are formed on the inner sidewall of the central through hole of the sealing cover 20.

[0028] In this embodiment, most of the oil can enter the return oil groove 13 from the annular groove 12, and then flow out from the bottom of the bearing bush 10 through the bottom of the lower oil outlet hole 14, and then flow into the bearing housing 100. A small portion of the oil enters the gap 1 from the return oil groove 21, and then flows out from the left and right ends of the bearing bush 10. The flow rate is small, which greatly reduces the impact on the bearing end caps on the left and right sides of the bearing housing 100, ensures the sealing of the bearing end caps, and reduces the risk of oil leakage.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sliding bearing bush structure for a high-speed flywheel, comprising a bush (10) mounted on a bearing housing (100), characterized in that: The bearing bush (10) has a central through hole (11) for mounting a rotating shaft (200) in the middle. The bearing bush (10) has an annular groove (12) in the middle of the left and right end faces. A sealing cap (20) is fixed on both the left and right ends of the bearing bush (10). The sealing cap (20) covers the left or right end of the bearing bush (10). The sealing cap (20) has a central through hole in the middle, which corresponds to the mounting through hole (11). A left-right extending oil return groove (13) is formed in the bearing bush (10) below the mounting through hole (11), and the oil return groove (13) communicates with two annular grooves (12); The bottom surface of the oil return groove (13) is formed with a lower oil outlet hole (14) that extends downward and protrudes from the bottom surface of the bearing (10).

2. The sliding bearing bush structure for a high-speed flywheel according to claim 1, characterized in that: An external mounting annular groove (15) is formed on the inner side wall at the outer end of the annular groove (12). The edge of the sealing cover (20) is inserted into the corresponding external mounting annular groove (15) and fixed to the bearing (10) by bolts. The inner end face of the edge of the sealing cover (20) presses against the inner end face of the corresponding external mounting annular groove (15).

3. The sliding bearing bush structure for a high-speed flywheel according to claim 2, characterized in that: There is a gap (1) between the outer wall of the sealing cover (20) and the inner wall of the outer mounting annular groove (15).

4. The sliding bearing bush structure for a high-speed flywheel according to claim 3, characterized in that: An oil return groove (21) is formed on the lower inner wall of the sealing cover (20), and the oil return groove (21) communicates with the corresponding annular groove (12).

5. The sliding bearing bush structure for a high-speed flywheel according to claim 1, characterized in that: The inner wall of the central through hole of the sealing cover (20) is formed with a plurality of inner sealing annular grooves (22), and the inner sealing ring (23) is nested in the corresponding inner sealing annular groove (22). The inner wall of the inner sealing ring (23) is close to the outer wall of the rotating shaft (200) inserted in the central through hole.

6. The sliding bearing bush structure for a high-speed flywheel according to claim 5, characterized in that: The inner sealing ring (23) is made of copper and its inner wall is a conical wall.

7. The sliding bearing bush structure for a high-speed flywheel according to claim 1, characterized in that: The cross-section of the return oil trough (13) is waist-shaped.

8. The sliding bearing bush structure for a high-speed flywheel according to claim 5, characterized in that: The sealing cap (20) has three inner sealing annular grooves (22) formed on the inner side wall of the central through hole.

Images