Lubricating structure of main shaft of flour mill

Abstract

The utility model provides a lubricating structure of a main shaft of a flour mill. The lubricating structure comprises the main shaft, a vertical bearing seat and a gear box, the upper part of the main shaft is mounted on the vertical bearing seat through an upper bearing, the lower part of the main shaft is mounted in the gear box through a lower bearing, and the bottom end of the main shaft is mounted in the gear box through a thrust bearing; an oil pumping disc is installed in the gearbox between the lower bearing and the thrust bearing, a middle shaft hole is formed in the spindle, a transverse hole is formed in the top end of the spindle, an output oil way communicated with the middle shaft hole is arranged at the bottom of the gearbox, and the oil pumping disc is used for enabling gear oil to sequentially pass through the output oil way, the middle shaft hole and the upper transverse hole to enter the upper bearing to lubricate the upper bearing. An oil guide structure is arranged on the vertical bearing seat below the upper bearing, the oil guide structure is communicated with an oil return port of the gear box through a gap between the vertical bearing seat and the main shaft, and an internal oil way penetrating through the oil return port and the output oil way is arranged in the gear box. The lubricating structure has the advantages of being more scientific in lubricating mode and not prone to being interfered by dust.

Description

Technical Field

[0001] This utility model relates to the field of grinding mill technology, and more specifically, to a lubrication structure for the main shaft of a grinding mill. Background Technology

[0002] A grinding mill is a device used to grind materials into powder, and it is widely used in metallurgy, building materials, chemical industry, mining and other fields.

[0003] like Figure 2 As shown, the existing lubrication structure of the grinding mill consists of an oil inlet in the upper main shaft area of ​​the grinding mill, with an oiling bolt installed. When lubrication is needed, the oiling bolt is removed, and grease is added for lubrication. An oil seal is installed at the lower part of the corresponding bearing to prevent grease from overflowing. During use, a certain amount of grease needs to be added periodically to maintain the normal operation of the grinding mill.

[0004] However, due to the ample dust inside the equipment, after a long period of use, a large amount of impurities accumulate near the lubrication bolt, and some dust may even enter the oil circuit, making it difficult to add lubricant. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a more scientific lubrication method for the main shaft of a grinding mill that is less susceptible to dust interference.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a lubrication structure for the main shaft of a grinding mill, comprising a main shaft, a vertical bearing seat, and a gearbox;

[0007] The upper part of the main shaft is mounted on a vertical bearing seat via an upper bearing, the lower part of the main shaft is mounted in a gearbox via a lower bearing, and the bottom end of the main shaft is mounted in a gearbox via a thrust bearing.

[0008] An oil pump disc is installed in the gearbox between the lower bearing and the thrust bearing. A central shaft hole is provided in the main shaft. A transverse hole is provided at the top of the main shaft. An output oil passage is provided at the bottom of the gearbox to connect to the central shaft hole. The oil pump disc is used to deliver gear oil sequentially through the output oil passage, the central shaft hole and the upper transverse hole to the upper bearing for lubrication.

[0009] An oil guiding structure is provided on the vertical bearing seat below the upper bearing. The oil guiding structure is connected to the oil return port of the gearbox through the gap between the vertical bearing seat and the main shaft. An internal oil passage is provided inside the gearbox, which connects the oil return port and the output oil passage.

[0010] Preferably, it also includes a bracket, on which the vertical bearing housing and gearbox are mounted and fixed.

[0011] Preferably, the lower bearing is a self-aligning roller bearing.

[0012] Preferably, the thrust bearing is a thrust self-aligning roller bearing.

[0013] Preferably, a bearing housing is provided at the bottom of the gearbox corresponding to the thrust bearing, and the output oil passage is disposed in the bearing housing.

[0014] Preferably, the oil guiding structure includes an oil guiding disc and an oil guiding hole.

[0015] Preferably, the oil guide holes are a plurality of oblique holes circumferentially distributed on the vertical bearing seat.

[0016] Preferably, the internal oil passage includes an oil hole formed between the thrust self-aligning roller bearing and the self-aligning roller bearing, for allowing gear oil to bypass the self-aligning roller bearing and reach the bottom end of the spindle.

[0017] Preferably, the bearing housing is a component of the bottom end cover of the gearbox.

[0018] Preferably, the oil hole is located above the pump oil plate.

[0019] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model sets up a gear oil circuit channel around the main shaft inside the grinding mill, so that the gear oil in the gearbox can also lubricate the bearings at both ends of the main shaft and can circulate efficiently. There is no need to set up a special external lubrication channel for the main shaft, nor is it necessary to provide grease to the main shaft from the outside, thus ensuring the long-term lubrication needs of the main shaft. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the lubrication structure of a grinding mill spindle according to this utility model.

[0021] Figure 2 This is the lubricating oil addition structure for the main shaft of a traditional grinding mill in this technology.

[0022] In the diagram: 1. Electric motor; 2. Motor pulley; 3. V-belt; 4. Pulley; 5. Drive shaft; 6. Small bevel gear; 7. Large bevel gear; 8. Main shaft; 9. Pump oil plate; 10. Flower frame; 11. Grinding roller assembly; 12. Grinding ring; 13. Gearbox; 14. Bearing housing; 15. Thrust self-aligning roller bearing; 16. Output oil passage; 17. Central shaft hole; 18. Upper transverse hole; 19. Upper bearing; 20. Oil guide plate; 21. Vertical bearing housing; 22. Oil guide hole; 23. Self-aligning roller bearing; 24. Oil hole. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0024] like Figure 1 As shown, a lubrication structure for the main shaft of a grinding mill.

[0025] First, the main transmission structure of the grinding mill in this embodiment will be briefly described.

[0026] The grinding mill is driven by an electric motor 1 through a motor wheel 2, a V-belt 3, a pulley 4, a drive shaft 5, and a small bevel gear 6 to rotate the large bevel gear 7 in the gearbox 13. This, in turn, drives the main shaft 8 and its oil pump disc 9 and the flower frame 10 to rotate. The flower frame 10 drives the grinding roller assembly 11 to roll on the grinding ring 12, thereby crushing the material.

[0027] The bearings located around the main shaft 8 require continuous lubrication and replenishment of lubricating grease.

[0028] The improvements to the lubrication structure in this embodiment include:

[0029] The upper part of the spindle 8 is mounted on the vertical bearing seat 21 via the upper bearing 19, and the lower part of the spindle 8 is mounted in the gearbox 13 via the lower bearing 23. The vertical bearing seat 21 and the gearbox 13 are fixedly mounted on a bracket.

[0030] The bottom end of the main shaft 8 is mounted in the gearbox 13 via a thrust bearing 15. The lower bearing 23 is a self-aligning roller bearing, and the thrust bearing 15 is a thrust self-aligning roller bearing.

[0031] An oil pump plate 9 is installed in the gearbox between the lower bearing 23 and the thrust bearing 15. The main shaft 8 is provided with a central shaft hole 17 and a transverse hole 18 at the top of the main shaft 8. The bottom of the gearbox 13 is provided with an output oil passage 16 that connects to the central shaft hole. The oil pump plate 9 is used to lubricate the upper bearing 19 by sequentially passing the output oil passage 16, the central shaft hole 17 and the upper transverse hole 18 through the output oil passage 16, the central shaft hole 17 and the upper transverse hole 18.

[0032] Specifically, in this embodiment, a bearing seat 14 is provided at the bottom of the gearbox 13 corresponding to the thrust bearing 15, and the output oil passage 16 is provided in the bearing seat 14. The bearing seat 14 is a component of the bottom end cover of the gearbox.

[0033] An oil guiding structure is provided on the vertical bearing seat 21 below the upper bearing 19, including an oil guiding plate 20 and oil guiding holes 22. The oil guiding holes 22 are a plurality of oblique holes circumferentially distributed on the vertical bearing seat. The oil guiding holes 22 are connected to the oil return port of the gearbox 13 through the gap between the vertical bearing seat 21 and the main shaft 8. The gearbox 13 is provided with an internal oil passage that connects the oil return port and the output oil passage 16. The internal oil passage includes an oil hole 24 opened between the thrust self-aligning roller bearing 15 and the self-aligning roller bearing 23. The oil hole 24 is located above the oil pump plate 9 and is used to allow gear oil to bypass the self-aligning roller bearing 23 and reach the bottom end of the main shaft 8.

[0034] Brief description of the oil circulation process:

[0035] The oil pump plate 9 rotates with the main shaft 8. During the rotation, the oil pump plate 9 provides downward pressure, which allows the gear oil in the gearbox 13 to be delivered to the upper part of the main shaft through the output oil passage 16 on the bearing seat 14 and the central shaft hole 17 of the main shaft. Then, it is applied to the upper bearing 19 for lubrication through the upper horizontal hole 18 of the main shaft.

[0036] After lubrication, the oil flows back to the gearbox 13 through the oil guide plate 20 and the oil guide hole 22, and then through the gap between the vertical bearing seat 21 and the main shaft 8.

[0037] The returning lubricating oil continues to flow downwards from the oil hole 24. Due to the design of the position of the oil hole 24, the lubricating oil flows directly to the lower part of the main shaft without passing through the self-aligning roller bearing 23, reducing the flow resistance of the gear oil.

[0038] Finally, it should be noted that: the preferred embodiments of this patent have been described in detail above, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A lubrication structure for the main shaft of a grinding mill, characterized in that: Includes the spindle, vertical bearing housing, and gearbox; The upper part of the main shaft is mounted on a vertical bearing seat via an upper bearing, the lower part of the main shaft is mounted in a gearbox via a lower bearing, and the bottom end of the main shaft is mounted in a gearbox via a thrust bearing. An oil pump disc is installed in the gearbox between the lower bearing and the thrust bearing. A central shaft hole is provided in the main shaft. A transverse hole is provided at the top of the main shaft. An output oil passage is provided at the bottom of the gearbox to connect to the central shaft hole. The oil pump disc is used to deliver gear oil sequentially through the output oil passage, the central shaft hole and the upper transverse hole to the upper bearing for lubrication. An oil guiding structure is provided on the vertical bearing seat below the upper bearing. The oil guiding structure is connected to the oil return port of the gearbox through the gap between the vertical bearing seat and the main shaft. An internal oil passage is provided inside the gearbox, which connects the oil return port and the output oil passage.

2. The lubrication structure for the grinding mill spindle according to claim 1, characterized in that: It also includes a bracket, on which the vertical bearing housing and gearbox are mounted and fixed.

3. The lubrication structure for the grinding mill spindle according to claim 2, characterized in that: The lower bearing is a self-aligning roller bearing.

4. The lubrication structure for the grinding mill spindle according to claim 1, characterized in that: The thrust bearing is a thrust self-aligning roller bearing.

5. The lubrication structure for the grinding mill spindle according to claim 1, characterized in that: The bottom end of the gearbox is provided with a bearing housing corresponding to the thrust bearing, and the output oil passage is provided in the bearing housing.

6. The lubrication structure for the grinding mill spindle according to claim 1, characterized in that: The oil guiding structure includes an oil guiding plate and an oil guiding hole.

7. The lubrication structure for the grinding mill spindle according to claim 6, characterized in that: The oil guide holes are several oblique holes distributed circumferentially on the vertical bearing seat.

8. The lubrication structure for the grinding mill spindle according to claim 1, characterized in that: The internal oil passage includes an oil hole located between the thrust self-aligning roller bearing and the self-aligning roller bearing, which allows gear oil to bypass the self-aligning roller bearing and reach the bottom of the spindle.

9. The lubrication structure for the grinding mill spindle according to claim 5, characterized in that: The bearing housing is a component of the bottom end cover of the gearbox.

10. The lubrication structure for the grinding mill spindle according to claim 8, characterized in that: The oil hole is located above the pump oil plate.

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