Novel gear structure of coal mill and cement mill

Abstract

The utility model relates to the field of coal mills and cement mills, in particular to a novel coal mill and cement mill gear structure which comprises a large gear and a small gear which are meshed with each other, a gear cover is sleeved outside the large gear and the small gear, at least one oil scraping mechanism is arranged on the gear cover, and two oil retaining rings are arranged on two sides of the large gear along the distribution direction of tooth grooves of the large gear. And two annular grooves are formed by the two oil retaining rings and the outer walls of the correspondingly connected large gears. According to the utility model, the two oil retaining rings connected with the outer wall of the bull gear are used for retaining splashing lubricating oil, and the oil scraping mechanism on the gear cover scrapes redundant lubricating oil on the bull gear, so that the lubricating oil is effectively prevented from splashing to the shell, the loss of the lubricating oil is reduced, and the stable operation of a coal mill or a cement mill is ensured.

Description

Technical Field

[0001] The utility model relates to the fields of coal mills and cement mills, and particularly relates to a novel gear structure for coal mills and cement mills. Background Art

[0002] During the operation of coal mills and cement mills, the large gear sleeved outside the cylinder body is an important part of coal mills and cement mills. In order to keep the large gear rotating normally, lubricating oil needs to be applied to the large gear. The lubricating oil at the edge of the large gear will be thrown onto the gear cover during the rotation of the large gear, resulting in waste of lubricating oil. The lubricating oil thrown onto the gear cover will also cause the gear cover to leak oil, posing a safety hazard. Currently, in order to avoid the above phenomena, an oil scraper is often provided on the gear cover to scrape off the lubricating oil on both sides of the large gear. For example, an oil scraping device for a mill or a large gear disclosed in the publication number CN 2018213395, an oil scraping device for a mill or a large gear, is arranged on the mill shoe cover or the gear cover, and is characterized in that: it includes a support rod and a pair of oil scraping mechanisms arranged opposite to each other around the large gear. The support rod is arranged on the mill shoe cover or the gear cover. The top of the oil scraping mechanism is arranged on the support rod through a movable device. The oil scraping mechanism includes an oil scraping plate and a movable connecting rod. The adjustable connecting rod is connected by a spring to keep the oil scraping plate in a pressed state with both ends of the mill sliding shoe. The other end of the connecting rod is connected to the oil scraping plate. When using this structure to scrape oil from the large gear, since the edge of the large gear is irregular, the phenomenon of insufficient oil scraping often occurs. To solve this problem, a novel gear structure for coal mills and cement mills is urgently needed to improve the oil scraping efficiency, reduce the waste of lubricating oil, and prevent the gear cover from leaking oil. Summary of the Utility Model

[0003] The utility model provides a novel gear structure for coal mills and cement mills to solve the problems of waste of lubricating oil and oil leakage of the gear cover in the prior art, reduce the splashing of lubricating oil on the large gear, and improve the oil scraping efficiency of the oil scraping mechanism.

[0004] A novel gear structure for coal mills and cement mills includes a large gear and a small gear that mesh with each other. A gear cover is sleeved outside the large gear and the small gear. It is characterized in that: at least one oil scraping mechanism is arranged on the gear cover. Two oil retaining rings are arranged on both sides of the large gear along the distribution direction of the tooth grooves of the large gear. Two annular grooves are formed by the two oil retaining rings and the outer wall of the large gear connected to them correspondingly. Preferably, the two oil retaining rings and the large gear are of an integral structure.

[0005] Preferably, sealing rings are respectively arranged on both ends of the gear cover near one side of the center of the large gear along the annular groove.

[0006] Preferably, the oil scraping mechanism includes a support rod disposed on the side of the gear cover away from the center of the large gear. Both ends of the support rod are respectively connected with a first connecting rod. Each first connecting rod is connected with a first oil scraping blade. A spring is connected between the two first connecting rods. The oil scraping mechanism further includes second connecting rods respectively arranged at both ends of the gear cover on the side close to the center of the large gear. Each second connecting rod is connected with a second oil scraping blade.

[0007] Preferably, the two first oil scraping blades are in contact with the outer walls of the two annular grooves, and the two second oil scraping blades are in contact with the side of the annular groove close to the center of the large gear.

[0008] Preferably, each first connecting rod and the first oil scraping blade are detachably connected by a first bolt, and each second connecting rod and the second oil scraping blade are detachably connected by a second bolt.

[0009] Preferably, a maintenance opening is correspondingly provided at the position on the gear cover where the oil scraping mechanism is installed.

[0010] Preferably, an oil sump is provided at the bottom of the gear cover, and an oil level observation port is provided on the oil sump.

[0011] Preferably, an oil filling port is provided on the side of the gear cover.

[0012] Preferably, the small gear is connected with a small gear rotating shaft, and semi-circular oil retaining rings are provided above the small gear rotating shaft on both sides of the gear cover.

[0013] Beneficial effects

[0014] 1. In the present utility model, two oil retaining rings are provided along the distribution direction of the tooth grooves on the large gear on both sides of the large gear. Two annular grooves are formed between the two oil retaining rings and the outer wall of the corresponding large gear. The splashing lubricating oil is blocked by the oil retaining rings, and the blocked lubricating oil flows into the annular grooves, reducing the loss of lubricating oil and ensuring the stable rotation of the large gear.

[0015] 2. In the present utility model, through the cooperation of the oil scraping mechanism and the oil retaining rings, the excess lubricating oil outside the oil retaining rings is scraped off and dropped into the oil sump below the gear cover, reducing the loss of lubricating oil and improving the utilization rate of lubricating oil. Description of the drawings

[0016] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present utility model will become more obvious.

[0017] Figure 1 Structural schematic diagram of the present utility model;

[0018] Figure 2 Side view of the large gear in the present utility model;

[0019] Figure 3 is Figure 1 a sectional view taken along line A-A in

[0020] Figure 4 is Figure 1 a sectional view taken along line B-B in

[0021] Figure 5 a sectional view of the pinion in the present utility model;

[0022] Figure 6 a side view of the oil separation ring in the present utility model;

[0023] In the figure: 1. gear cover, 2. large gear, 3. sealing ring, 4. support rod, 5. spring, 6. first connecting rod, 7. first oil scraping blade, 8. oil baffle ring, 9. annular groove, 10. first bolt, 11. inspection opening, 12. inspection cover plate, 13. oil scraping mechanism, 14. oil level observation port, 15. oil sump, 16. sealing ring installation groove, 17. second connecting rod, 18. second oil scraping blade, 19. second bolt, 20. pinion, 21. oil filling port, 22. semi-circular flange, 23. semi-circular rubber sheet, 24. oil separation ring. 25. pinion shaft. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "middle", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0026] In the present utility model, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Such as Figures 1 to 3As shown in the figure, a new type of coal mill and cement mill gear structure: It includes a large gear 2 and a small gear 20 that mesh with each other. A gear cover 1 is sleeved outside the large gear and the small gear. At least one oil scraping mechanism 13 is provided on the gear cover. Two oil retaining rings 8 are provided on both sides of the large gear along the distribution direction of the tooth grooves on the large gear. The two oil retaining rings and the outer wall of the corresponding connected large gear form two annular grooves 9. The bottoms of the two annular grooves are flush with the bottoms of the tooth grooves on the large gear. The oil retaining rings can block the lubricating oil at the edge of the large gear. The lubricating oil blocked by the oil retaining rings flows into the annular grooves. The lubricating oil can flow from the annular grooves into the tooth grooves, and the lubricating oil can play a lubricating effect on the large gear in the tooth grooves, effectively reducing the waste of lubricating oil and preventing the lubricating oil from splashing onto the gear cover. The oil retaining rings and the large gear are of an integral structure. The oil retaining rings are fixed on the large gear by welding. When the large gear rotates, the oil retaining rings move synchronously with the large gear. Two sealing rings 3 are provided at both ends of the gear cover close to the center of the large gear along the annular grooves. Each sealing ring abuts against the side of the corresponding annular groove close to the center of the large gear. The two sealing rings are arranged in the corresponding sealing ring installation grooves 16. The connection method between the sealing rings and the sealing ring installation grooves is detachable. The sealing rings are stuck in the sealing ring installation grooves. There will be normal wear and tear during the use of the sealing rings, which is convenient for replacing the sealing rings. The two sealing rings can prevent the splashed lubricating oil from spilling onto the outer wall of the large gear close to the central axis of the large gear, reducing the waste of lubricating oil.

[0028] The oil scraping mechanism includes a support rod. The support rod is arranged on the side of the gear cover away from the center of the large gear. The two ends of the support rod are respectively connected with a first connecting rod 6. A first oil scraping blade 7 is connected to each first connecting rod. A spring 5 is connected between the two first connecting rods. The two first oil scraping blades abut against the outer walls of the two annular grooves. The spring can keep a force that makes the two first connecting rods tighten towards the inside of the large gear, so that the first oil scraping blades connected to the ends of the two first connecting rods can closely adhere to the outer walls of the annular grooves, achieving a better oil scraping effect. Two second connecting rods 17 are respectively provided at both ends of the gear cover close to the center of the large gear on both sides of the spring. A second oil scraping blade 18 is connected to each second connecting rod. The two second oil scraping blades abut against the side of the annular groove close to the center of the large gear. The two second oil scraping blades are respectively located on the side away from the large gear of the two sealing rings. The two second oil scraping blades can scrape off the excess lubricating oil on the side of the annular groove close to the center of the large gear, preventing the excess lubricating oil from seeping into the sealing rings, causing waste of lubricating oil and affecting the normal rotation of the large gear.

[0029] A small gear 20 is provided on one side of the large gear. The small gear meshes with the large gear. The rotation of the small gear drives the rotation of the large gear.

[0030] Each first connecting rod and the first oil scraping blade are detachably connected by a first bolt 10, and each second connecting rod and the second oil scraping blade are detachably connected by a second bolt 19. After long-term friction with the large gear, the first oil scraping blade and the second oil scraping blade will be worn, and the oil scraping blades need to be replaced regularly to ensure the normal operation of the oil scraping work.

[0031] A maintenance opening 11 is provided corresponding to the position where the oil scraping mechanism is installed on the gear cover. The maintenance opening is used to repair the equipment when a fault occurs. Setting the maintenance opening at the position of the oil scraping mechanism can facilitate the timely replacement of the oil scraping blade. A maintenance cover plate 12 is movably installed on the maintenance opening, which is convenient for the staff to open and close.

[0032] An oil sump 15 is provided at the bottom of the gear cover. The lubricating oil scraped off by the oil scraping mechanism can fall into the oil sump for recycling. An oil level observation port 14 is provided on the oil sump. The oil level observation port is located at the lowest point of the large gear. The staff can observe the height of the lubricating oil inside the oil sump through the oil level observation port to facilitate the timely addition of lubricating oil and maintain the smooth rotation of the large gear. A lubricating oil filling port 21 is provided on the side of the gear cover, which is convenient for the staff to add lubricating oil.

[0033] As Figure 4 shown, Figure 4 The figure is a cross-sectional view of the part of the gear cover where the oil scraping mechanism is not installed. Two sealing rings seal the side of the annular groove close to the center of the large gear, preventing the lubricating oil from entering the outer wall of the large gear and reducing the loss of lubricating oil.

[0034] As Figures 5 - 6 shown, semi-circular oil retaining rings are provided on both sides of the gear cover above the small gear rotating shaft 25. The semi-circular oil retaining ring includes a semi-circular flange 22 and a semi-circular rubber sheet 23. The semi-circular flange is fixedly connected to the gear cover, and the semi-circular oil retaining ring and the semi-circular rubber sheet are detachably connected, which is convenient for regularly replacing the semi-circular rubber sheet. The small gear rotating shaft 25 is located below the semi-circular oil retaining ring, and an oil separating ring 24 is provided along the small gear rotating shaft. The oil separating ring effectively prevents the lubricating oil on the small gear rotating shaft from splashing out of the gear cover, and sealing structures are provided on both sides of the small gear.

[0035] Working principle

[0036] When the coal mill or cement mill is working, it requires the cooperative rotation of the large gear 2. When the large gear rotates, lubricating oil is needed for cooperation. The lubricating oil plays a lubricating role on the surface and tooth grooves of the large gear. In the present utility model, two oil retaining rings 8 are provided on both sides of the large gear along the distribution direction of the tooth grooves on the large gear. The two oil retaining rings and the outer wall of the corresponding large gear form two annular grooves 9. A scraping oil mechanism 13 for cooperating with the annular grooves is also provided on the gear housing. The first scraping oil blade 7 on the scraping oil mechanism fits the outer wall of the annular groove, and the second scraping oil blade 18 fits the side of the annular groove close to the center of the large gear. The first scraping oil blade and the second scraping oil blade can scrape off the lubricating oil overflowing from the annular groove. An oil sump 15 is provided below the gear housing. The scraped lubricating oil can enter the oil sump under the action of gravity. An oil level observation port 14 is provided on the oil sump. The staff can timely observe the height of the oil level in the oil sump through the oil level observation port, and judge whether to add lubricating oil in time according to the height of the oil level in the oil sump to ensure the normal rotation of the large gear.

[0037] The above shows and describes the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

Claims

1. A new type of gear structure for coal mill and cement mill, comprising a large gear and a small gear meshing with each other, wherein the large gear and the small gear are provided with a gear cover, characterized in that: At least one oil scraping mechanism is provided on the gear cover, and two oil deflector rings are provided on both sides of the large gear along the distribution direction of the large gear tooth grooves. The two oil deflector rings and the outer walls of the large gear connected thereto form two annular grooves. The oil scraping mechanism includes a support rod, and the support rod is provided on the side of the gear cover away from the center of the large gear. The two ends of the support rod are respectively connected to a first connecting rod, and each of the first connecting rods is connected to a first oil scraping blade, and a spring is connected between the two first connecting rods. The oil scraping mechanism also includes second connecting rods respectively provided at both ends of the gear cover on the side of the gear cover close to the center of the large gear, and each of the second connecting rods is connected to a second oil scraping blade.

2. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: The two oil deflector rings and the large gear are an integrated structure.

3. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: Sealing rings are respectively arranged along the annular groove on one side of the two ends of the gear cover close to the center of the large gear.

4. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: The two first oil scraping blades are in conflict with the outer walls of the two annular grooves, and the two second oil scraping blades are in conflict with the two annular grooves on one side close to the center of the large gear.

5. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: Each of the first connecting rods and the first oil scraper blade is detachably connected via a first bolt, and each of the second connecting rods and the second oil scraper blade is detachably connected via a second bolt.

6. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: An inspection port is provided on the gear cover corresponding to the position where the oil scraper mechanism is installed.

7. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: An oil pool is provided at the bottom of the gear cover, and an oil level observation port is provided on the oil pool.

8. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: A fuel filling port is arranged on the side of the gear cover.

9. A new type of coal mill and cement mill gear structure as claimed in claim 1, characterized in that: The pinion is connected to a pinion shaft, and semicircular oil retaining rings are provided on both sides of the gear cover above the pinion shaft.

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