A seal structure for a bearing of a pinion shaft of a mill

Abstract

The utility model discloses a mill pinion bearing dilute oil lubrication sealing structure, including bearing cover, bearing seat, shaft, see cover, oil cup, gland, oil seal, sealing copper ring and O type ring, the shaft is installed in bearing seat through bearing, and sealing copper ring is equipped on the shaft, and its inner ring is closely matched with the shaft and rotates together, see cover is installed on bearing cover and bearing seat, and see cover insides are equipped with see cover groove and oil seal groove, and sealing copper ring see cover groove is in, oil seal is installed in oil seal groove, and oil seal inner ring is closely matched with the shaft, and outer ring is closely matched with see cover, and oil seal is pressed through gland, and see cover, oil seal and sealing copper ring form the labyrinth seal, see cover outer ring is equipped with O type ring, and oil cup is installed on see cover, and the lubricating grease is filled in see cover groove and sealing copper ring groove through oil cup injection.

Description

Technical Field

[0001] This utility model relates to a thin oil lubrication and sealing structure for a mill pinion bearing, belonging to the field of mill technology. Background Technology

[0002] When the pinion gear in a mill rotates at high speed, the pinion bearing can stably withstand axial and radial loads while reducing heat and wear caused by friction. The purpose of bearing lubrication is to separate the rolling elements and rolling surfaces with a thin oil film. During operation, a uniform lubricating oil film is formed on the rolling surfaces, thereby reducing internal friction within the bearing. In addition, the lubricating oil can dissipate the heat generated by friction, preventing overheating of the bearing and aging of the lubricating oil itself. Currently, the sealing method for mill pinion bearings is mostly a labyrinth seal + J-type sealing rings installed in both directions, with a return oil pipe connected to one side. In this sealing method, the labyrinth seal lacks an oil return groove, and there is no grease between the J-type seals, resulting in untimely oil return and oil leakage problems, affecting the on-site environment and normal production. Therefore, there is an urgent need for a technology that can solve the problem of thin oil lubrication sealing for mill pinion bearings. Utility Model Content The technical problem to be solved by this utility model is to address the deficiencies of the existing technology by providing a sealing structure for thin oil lubrication of mill pinion bearings, so as to solve the problem of oil leakage caused by unreasonable sealing structure in thin oil lubrication of mill pinion bearings.

[0003] To solve this technical problem, this utility model provides a thin oil lubrication and sealing structure for a mill pinion bearing, including a bearing cover, a bearing housing, a shaft, a through cover, an oil cup, a pressure cap, an oil seal, a sealing copper ring, and an O-ring. The shaft is mounted in the bearing housing via a bearing, and the sealing copper ring is mounted on the shaft, with its inner ring tightly fitted to the shaft and rotating together with it. The through cover is mounted on the bearing cover and bearing housing via bolts and washers. The inside of the through cover has a through cover groove and an oil seal groove. The sealing copper ring is positioned and embedded in the through cover groove of the through cover via a shaft shoulder. The oil seal is located in the oil seal groove of the through cover, with its inner ring tightly fitted to the shaft and its outer ring tightly fitted to the through cover. The oil seal is pressed by the pressure cap, and the through cover, oil seal, and sealing copper ring form a labyrinth seal. The outer ring of the through cover has an O-ring, and the oil cup is threaded onto the through cover. Lubricating grease is injected through the oil cup and fills the through cover groove and the sealing copper ring groove, increasing lubrication while preventing lubricating oil from flowing out.

[0004] The portion of the through cover that extends into the bearing cover and bearing housing shown has an O-ring groove on its exterior. The O-ring is placed inside the O-ring groove to seal the through cover with the bearing cover and bearing housing.

[0005] The end of the cover is provided with a grease injection hole, and an oil cup is installed on the grease injection hole.

[0006] The outer side of the sealing copper ring is provided with multiple rectangular grooves. The outer rectangular grooves cooperate with the grooves on the through cover to form a labyrinth seal.

[0007] The oil seal inner groove is equipped with a spring.

[0008] An air filter is threaded onto the bearing cover to filter dust and impurities from the air.

[0009] The gland is mounted on the cover by bolt two and washer two.

[0010] The bearing housing has an oil return groove at the bottom, through which lubricating oil can flow back into the bearing housing and finally be discharged from the pinion device.

[0011] The oil seal is made of nitrile rubber; the spring is made of spring steel.

[0012] Beneficial effects: The thin oil lubrication and sealing structure of the mill pinion bearing of this utility model will not cause problems such as oil leakage or seepage, so that the pinion bearing device can operate normally. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 Enlarged schematic diagram of Part I; Figure 3 This is a schematic diagram of the structure of the transparent cover of this utility model; Figure 4 This utility model Figure 3 Enlarged schematic diagram of Part II; Figure 5 This is a schematic diagram of the sealing copper ring of this utility model; Figure 6 This is a schematic diagram of the structure of the oil seal of this utility model; Figure 7 This utility model Figure 6 Enlarged schematic diagram of Part III.

[0014] In the diagram: 1. Bearing cover; 2. Bearing housing; 3. Oil return groove; 4. Shaft; 5. Air filter; 6. Through cover; 7. Bolt 1; 8. Washer 1; 9. Oil cup; 10. Bolt 2; 11. Washer 2; 12. Pressure cap; 13. Oil seal; 14. Sealing copper ring; 15. O-ring; 16. O-ring groove; 17. Through cover groove; 18. Oil seal groove; 19. Grease injection hole; 20. Spring. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] like Figures 1-7As shown, this utility model provides a thin oil lubrication and sealing structure for a mill pinion bearing, including a bearing cover 1, a bearing housing 2, a shaft 4, a through cover 6, an oil cup 9, a pressure cap 12, an oil seal 13, a sealing copper ring 14, and an O-ring 15. The shaft 4 is mounted in the bearing housing 2 via a bearing. The sealing copper ring 14 is disposed on the shaft 4 and positioned by a shaft shoulder. The inner ring of the sealing copper ring 14 is tightly fitted with the shaft 4 and rotates together with the shaft 4. The through cover 6 is mounted on the bearing cover 1 and the bearing housing 2 via bolts 7 and washers 8. The inner side of the through cover 6 is provided with a through cover groove 17 and an oil seal groove 18. The sealing copper ring 14 is positioned and embedded in the through cover groove 17 of the through cover 6 through the shaft shoulder; the oil seal 13 is installed in the oil seal groove 18 of the through cover 6, the inner ring of the oil seal 13 is tightly fitted with the shaft 4, and the outer ring is tightly fitted with the through cover 6. The oil seal 13 is pressed by the pressure cap 12, and the through cover 6, the oil seal 13 and the sealing copper ring 14 form a labyrinth seal; the outer ring of the through cover 6 is provided with an O-ring 15, and the oil cup 9 is installed on the through cover 6 by threads. The grease is injected through the oil cup 9 and fills the groove of the through cover 6 and the groove of the sealing copper ring 14, which increases lubrication and prevents the lubricating oil from flowing out.

[0017] The portion of the through cover 6 that extends into the bearing cover 1 and bearing seat 2 shown has an O-ring groove 16 on its outside. An O-ring 15 is placed in the O-ring groove 16 to seal the through cover 6 with the bearing cover 1 and bearing seat 2.

[0018] The end of the cover 6 is provided with a grease injection hole 19, and the oil cup 9 is threadedly installed on the grease injection hole 19.

[0019] The outer side of the sealing copper ring 14 is provided with multiple rectangular grooves. The outer rectangular grooves cooperate with the through cover groove 17 on the through cover 6 to form a labyrinth seal.

[0020] The inner groove of the oil seal 13 is equipped with a spring 20. The spring 20 can provide initial sealing force, compensate for wear, and maintain dynamic sealing. It is the core component to ensure the long-term stable operation of the sealing system.

[0021] An air filter 5 is threadedly installed on the bearing cover 1 to filter dust and impurities in the air.

[0022] The pressure cap 12 is installed on the through cap 6 by bolt 2 10 and washer 2 11.

[0023] The bearing housing 2 has an oil return groove 3 at the bottom, and the lubricating oil can flow back into the bearing housing 2 along the oil return groove 3 and finally be discharged from the pinion device.

[0024] The oil seal 13 is made of rubber material, such as nitrile rubber, which has sufficient tensile strength and elongation, working temperature -40℃~120℃, and working pressure 0.05MPa; the spring 20 is made of spring steel, which effectively prevents lubricating oil leakage.

[0025] The oil-lubricated sealing structure for the mill pinion bearing of this utility model forms a labyrinth seal through the cooperation of the cover, sealing copper ring, oil seal and shaft, which will not cause problems such as oil leakage or seepage, and ensures the normal operation of the pinion bearing device.

[0026] The above-described embodiments of this utility model are merely illustrative examples and are not the only ones. All modifications within the scope of this utility model or equivalent to this utility model are encompassed by this utility model.

Claims

1. A thin oil lubrication sealing structure for a mill pinion bearing, characterized in that: The system includes a bearing cover (1), a bearing housing (2), a shaft (4), a through cover (6), an oil cup (9), a pressure cap (12), an oil seal (13), a sealing copper ring (14), and an O-ring (15). The shaft (4) is mounted in the bearing housing (2) via a bearing. The sealing copper ring (14) is mounted on the shaft (4), with its inner ring tightly fitted to the shaft (4) and rotating together with the shaft (4). The through cover (6) is mounted on the bearing cover (1) and the bearing housing (2) via bolts (7) and washers (8). The inside of the through cover (6) is provided with a through cover groove (17) and an oil seal groove (18). The sealing copper ring (14) passes through... The shoulder is positioned and embedded in the through cover groove (17) of the through cover (6); the oil seal (13) is installed in the oil seal groove (18) of the through cover (6), the inner ring of the oil seal (13) is tightly fitted with the shaft (4), and the outer ring is tightly fitted with the through cover (6). The oil seal (13) is pressed by the pressure cap (12), and the through cover (6), the oil seal (13) and the sealing copper ring (14) form a labyrinth seal; the outer ring of the through cover (6) is provided with an O-ring (15), and the oil cup (9) is installed on the through cover (6) by thread. The grease is injected and filled into the through cover groove (6) and the sealing copper ring (14) groove through the oil cup (9).

2. The thin oil lubrication sealing structure for the mill pinion bearing according to claim 1, characterized in that: The portion of the through cover (6) extending into the bearing cover (1) and bearing seat (2) shown is provided with an O-ring groove (16). An O-ring (15) is placed in the O-ring groove (16) to seal the through cover (6) with the bearing cover (1) and bearing seat (2).

3. The thin oil lubrication sealing structure for the mill pinion bearing according to claim 1, characterized in that: The end of the cover (6) is provided with a grease injection hole (19), and the oil cup (9) is installed on the grease injection hole (19).

4. The thin oil lubrication sealing structure for the mill pinion bearing according to claim 1, characterized in that: The outer side of the sealing copper ring (14) is provided with multiple rectangular grooves. The outer rectangular grooves cooperate with the through cover groove (17) on the through cover (6) to form a labyrinth seal.

5. The thin oil lubrication sealing structure for the mill pinion bearing according to claim 1, characterized in that: The oil seal (13) has a spring (20) in its inner groove, and the spring (20) is made of spring steel.

6. The thin oil lubrication sealing structure for the mill pinion bearing according to claim 1, characterized in that: An air filter (5) is threaded onto the bearing cover (1) to filter dust and impurities in the air.

7. The thin oil lubrication sealing structure for the mill pinion bearing according to claim 1, characterized in that: The pressure cap (12) is mounted on the through cap (6) by bolt two (10) and washer two (11).

8. The thin oil lubrication sealing structure for the mill pinion bearing according to claim 1, characterized in that: The bearing housing (2) has an oil return groove (3) at the bottom, and the lubricating oil can flow back into the bearing housing (2) along the oil return groove (3) and finally be discharged from the pinion device.

9. The thin oil lubrication sealing structure for the mill pinion bearing according to any one of claims 1-8, characterized in that: The oil seal (13) is made of nitrile rubber.

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