Sealing device for large gear ring of rotary kiln

Abstract

The utility model discloses a sealing device for a large gear ring of a rotary kiln, which belongs to the technical field of mechanical sealing devices, is arranged between the large gear ring and a gear cover and comprises a static sealing cover, a dynamic partition plate component and a connecting component. The other end of the static sealing cover is connected with one end of the connecting assembly; the other end of the connecting assembly is connected with the large gear ring; a sealing cavity is formed among the static sealing cover, the connecting assembly, the large gear ring and the gear cover. A dynamic partition plate assembly is arranged in the sealing cavity; the dynamic partition plate assembly is fixedly connected with the large gear ring and divides the sealing cavity into eight cavities. The eight cavities are used for enabling leaked lubricating oil to be located between the large gear ring and the gear cover. The sealing device for the large gear ring of the rotary kiln not only can prevent leakage of lubricating oil, but also can recycle the lubricating oil, and is simple in structure and easy to install.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical sealing devices, in particular to a sealing device for a large gear ring of a rotary kiln. Background Art

[0002] A rotary kiln (commonly known as a rotary kiln) is a type of building materials equipment. It can be categorized as cement kilns, metallurgical and chemical kilns, and lime kilns based on the materials processed. Rotary kilns are widely used in many production industries, including building materials, metallurgy, chemicals, and environmental protection, for mechanical, physical, or chemical processing of solid materials. They are also irreplaceable large-scale equipment in the lithium battery industry. A rotary kiln consists of a cylinder, a transmission mechanism, support and retaining wheel bearings, kiln head and tail seals, a kiln head hood, and a combustion mechanism. The transmission mechanism, consisting of a meshing pinion and a large ring gear, is located in the center of the cylinder. The motor drives the pinion, which in turn rotates the large ring gear, thereby rotating the cylinder at the required speed. Therefore, the large ring gear is an essential component of a rotary kiln.

[0003] During the actual operation of a rotary kiln, lubricating oil must be added to the large ring gear to reduce wear caused by the meshing of the pinion and the large ring gear, thereby extending the service life of the large ring gear. However, during the rotation of the large ring gear, the large ring gear will carry lubricating oil into the gap between the ring gear and the gear cover. Over time, the seal will gradually fail, causing lubricating oil leakage, polluting the working environment, and increasing lubricating oil consumption. In order to solve the existing problems, technicians have disclosed some solutions. Application publication number CN202675851U discloses a rotary kiln large gear sealing device, which uses a redesigned bridge and clamping device to firmly connect the sealing ring to the large gear ring, effectively preventing the large gear ring seal from falling off and oil leakage that is difficult to clean during equipment operation. However, the clamping device needs to be connected to the large gear ring with bolts, and the casting requirements for the large gear ring during installation are high, which has certain limitations in form; Application publication number CN219797876U discloses a labyrinth sealing method for the large gear ring of a rotary kiln, which forms a multi-stage labyrinth sealing cavity by staggering dynamic rings and static rings. At the same time, stop rings are distributed on the dynamic ring and the static ring, which further seals the large gear ring, has a good sealing effect, and can prevent the leakage of internal grease. The static ring is fixedly installed by a second bracket and a second reinforcing plate. The dynamic ring and the static ring are firmly installed, have good anti-swaying effect, and have a long service life. However, its structure is relatively complex, which makes the installation complicated and inconvenient to replace and disassemble.

[0004] To address the above-mentioned lubricating oil leakage problem, researchers have proposed a variety of sealing devices, most of which are complex and difficult to install. Therefore, providing a sealing device with a simple structure and good sealing performance is an urgent problem to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing device for the large gear ring of a rotary kiln to address the above-mentioned shortcomings. It is intended to solve the sealing problem between the large gear ring and the gear cover. It can not only prevent the leakage of lubricating oil, but also enable the recycling of lubricating oil. It has a simple structure and is easy to install. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A sealing device for a rotary kiln large gear ring is arranged between the large gear ring and a gear cover, and includes a static sealing cover, a dynamic baffle assembly and a connecting assembly; one end of the static sealing cover is fixedly connected to the gear cover, and the other end is connected to one end of the connecting assembly; the other end of the connecting assembly is connected to the large gear ring; a sealed cavity is formed among the static sealing cover, the connecting assembly, the large gear ring and the gear cover; a dynamic baffle assembly is provided in the sealed cavity; the dynamic baffle assembly is fixedly connected to the large gear ring and divides the sealed cavity into eight chambers; the eight chambers are used to allow leaked lubricating oil to return to between the large gear ring and the gear cover.

[0007] Furthermore, the static sealing cover includes a static sealing cover and a static support ring arranged along the axial direction; the static sealing cover includes a first annular plate arranged along the radial direction and a second annular plate arranged along the axial direction; one end of the static support ring is fixedly connected to the outside of the gear cover, and the other end is fixedly connected to one end of the first annular plate; a second annular plate is provided at the other end of the first annular plate; the second annular plate and the static support ring are arranged on the same side of the first annular plate; the second annular plate is connected to the large gear ring through a connecting assembly.

[0008] Furthermore, the connection assembly includes a transition plate and a dynamic support plate; one side of the transition plate is fixedly connected to the side wall of the large gear ring, and the other side is fixedly connected to the dynamic support plate; the dynamic support plate is embedded in the second annular plate.

[0009] Furthermore, a reinforcing rib plate is provided between the transition plate and the large gear ring.

[0010] Furthermore, the dynamic baffle assembly includes a dynamic annular axial baffle and a dynamic annular radial baffle; one end of the dynamic annular axial baffle is fixedly connected to the dynamic support plate, and the other end is provided with a gap with the first annular plate; three dynamic annular radial baffles are respectively provided on both sides of the dynamic annular axial baffle; the three dynamic annular radial baffles facing the static support ring are, from left to right, the first dynamic annular radial baffle, the second dynamic annular radial baffle and the third dynamic annular radial baffle; the three dynamic annular radial baffles facing the second annular plate are, from left to right, the fourth dynamic annular radial baffle, the fifth dynamic annular radial baffle and the sixth dynamic annular radial baffle.

[0011] Furthermore, a triangular plate is provided at the connection between the dynamic annular axial partition plate and the dynamic support plate.

[0012] Furthermore, a number of oil collecting baffles are evenly arranged on the side of the dynamic annular axial baffle facing the static support ring; the oil collecting baffle is located between the fifth dynamic annular radial baffle and the sixth dynamic annular radial baffle; the oil collecting baffle is perpendicular to the dynamic annular axial baffle, the fifth dynamic annular radial baffle and the sixth dynamic annular radial baffle.

[0013] Furthermore, the dynamic annular axial partition is provided with a plurality of return holes; the return holes are evenly located on both sides of the oil collecting baffle; a freely sliding return sleeve is nested in the return hole; a return pipe is fixedly provided on the three dynamic annular radial partitions facing the static support ring; the return pipe passes through the third dynamic annular radial partition, the second dynamic annular radial partition and the first dynamic annular radial partition in sequence to lead to the space between the large gear ring and the gear cover; a through hole is provided on the return pipe; the position of the through hole corresponds one-to-one to the position of the return sleeve, so that the lubricating oil passing through the return sleeve enters the return pipe.

[0014] Furthermore, an annular groove is provided at the end of the fourth dynamic annular radial partition close to the second annular plate; and the groove is filled with wool felt.

[0015] Furthermore, an annular sealing ring is provided on the outer side wall of the groove.

[0016] The beneficial effects of the utility model are:

[0017] The utility model discloses a sealing device for the large gear ring of a rotary kiln, belonging to the technical field of mechanical sealing devices. The device is arranged between the large gear ring and the gear cover, and includes a static sealing cover, a dynamic partition assembly, and a connecting assembly. One end of the static sealing cover is fixedly connected to the gear cover, and the other end is connected to one end of the connecting assembly. The other end of the connecting assembly is connected to the large gear ring. A sealed cavity is formed between the static sealing cover, the connecting assembly, the large gear ring, and the gear cover. A dynamic partition assembly is provided in the sealed cavity. The dynamic partition assembly is fixedly connected to the large gear ring and divides the sealed cavity into eight chambers. The eight chambers are used to return leaked lubricating oil to between the large gear ring and the gear cover. The utility model provides a sealing device for the large gear ring of a rotary kiln, which can not only prevent the leakage of lubricating oil, but also enable the recycling of lubricating oil. The device has a simple structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic structural diagram of the cross section of the utility model, located on the upper part of the large gear;

[0020] Figure 3 It is a schematic structural diagram of the cross section of the utility model, located at the lower part of the large gear;

[0021] Figure 4 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 5 It is a structural diagram of the oil collecting baffle;

[0023] In the accompanying drawings: 1-large ring gear, 2-gear cover, 3-static sealing cover, 4-dynamic partition assembly, 5-connecting assembly, 6-sealing chamber, 7-static sealing cover, 8-static support ring, 9-first annular plate, 10-second annular plate, 11-transition plate, 12-dynamic support plate, 13-reinforcement rib plate, 14-dynamic annular axial partition, 16-gap, 17-first dynamic annular radial partition, 18-second dynamic annular radial partition, 19-third dynamic annular Radial partition, 20-fourth dynamic annular radial partition, 21-fifth dynamic annular radial partition, 22-sixth dynamic annular radial partition, 23-triangular plate, 24-oil collecting baffle, 25-return sleeve, 26-return pipe, 28-annular groove, 29-annular sealing ring, 30-first chamber, 31-second chamber, 32-third chamber, 33-fourth chamber, 34-fifth chamber, 35-sixth chamber, 36-seventh chamber, 37-eighth chamber. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0025] Example 1:

[0026] Attachment Figures 1 to 5A sealing device for a rotary kiln large gear ring 1 is arranged between the large gear ring 1 and the gear cover 2, and includes a static sealing cover 3, a dynamic partition assembly 4 and a connecting assembly 5; one end of the static sealing cover 3 is fixedly connected to the gear cover 2, and the other end is connected to one end of the connecting assembly 5; the other end of the connecting assembly 5 is connected to the large gear ring 1; a sealing cavity 6 is formed between the static sealing cover 3, the connecting assembly 5, the large gear ring 1 and the gear cover 2; a dynamic partition assembly 4 is provided in the sealing cavity 6; the dynamic partition assembly 4 is fixedly connected to the large gear ring 1, and divides the sealing cavity 6 into eight chambers; the eight chambers are used to allow the leaked lubricating oil to return to between the large gear ring 1 and the gear cover 2. As can be seen from the above structure, the sealing device of the large gear ring 1 of the rotary kiln is arranged between the large gear ring 1 and the gear cover 2, including a static sealing cover 3, a dynamic partition assembly 4 and a connecting assembly 5. The large gear ring 1 is connected to the static sealing cover 3 through the connecting assembly 5. One end of the connecting assembly 5 is fixedly connected to the large gear ring 1, and the other end is movably connected to the static sealing cover 3. The static sealing cover 3 is fixedly connected to the gear cover 2. When the large gear ring 1 rotates, it can drive the connecting assembly 5 to rotate together, while the static sealing cover 3 and the gear cover 2 are relatively fixed. In this way, a sealed chamber 6 is formed between the large gear ring 1, the connecting assembly 5, the static sealing cover 3 and the gear cover 2 to prevent the leakage of lubricating oil. A dynamic partition assembly 4 is set in this sealed chamber 6. The dynamic partition assembly 4 is fixed on the connecting assembly 5. The dynamic partition assembly 4 divides the sealed chamber 6 into eight chambers, such as Figure 1 As shown, from left to right and from top to bottom, there are the first chamber 30, the second chamber 31, the third chamber 32, the fourth chamber 33, the fifth chamber 34, the sixth chamber 35, the seventh chamber 36, and the eighth chamber 37. When the large gear rotates, it drives the connecting assembly 5 and the dynamic partition assembly 4 to rotate. At the same time, the leaked lubricating oil returns to the space between the large gear ring 1 and the gear cover 2 through these chambers. The sealing device for the large gear ring 1 of the rotary kiln of the utility model can not only prevent the leakage of lubricating oil, but also enable the recycling of lubricating oil. It has a simple structure and is easy to install.

[0027] The static seal cover 3 includes a static seal cover 7 and an axially disposed static support ring 8. The static seal cover 7 includes a radially disposed first annular plate 9 and an axially disposed second annular plate 10. One end of the static support ring 8 is fixedly connected to the outside of the gear cover 2, and the other end is fixedly connected to one end of the first annular plate 9. The other end of the first annular plate 9 is provided with a second annular plate 10. The second annular plate 10 and the static support ring 8 are disposed on the same side of the first annular plate 9. The second annular plate 10 is connected to the large ring gear 1 via a connecting assembly 5. As can be seen from the above structure, the static seal cover 7 includes a radially disposed first annular plate 9 and an axially disposed second annular plate 10. The first and second annular plates 9, 10 are perpendicular to each other and connected at both ends or integrally formed, forming the primary sealing component of the seal chamber 6. The first annular plate 9 is connected to the gear cover 2 via the axially disposed static support ring 8. The first annular plate 9 and the static support ring 8 are bolted together, and the static support ring 8 is welded to the gear cover 2. The second annular plate 10 is connected to the large ring gear 1 via the connecting assembly 5, thus forming the aforementioned seal chamber 6.

[0028] The connecting assembly 5 includes a transition plate 11 and a dynamic support plate 12; one side of the transition plate 11 is fixedly connected to the side wall of the large gear ring 1, and the other side is fixedly connected to the dynamic support plate 12; the dynamic support plate 12 is embedded in the second annular plate 10. As can be seen from the above structure, the connecting assembly 5 includes a transition plate 11 and a dynamic support plate 12. The transition plate 11 and the dynamic support plate 12 are both radially arranged annular plates, one side of which partially overlaps with the side wall of the large gear ring 1, and the transition plate 11 is fixed to the large gear ring 1 by screws, and the other side is welded to the dynamic support plate 12. This can avoid welding the dynamic support plate 12 directly to the large gear ring 1, reducing the welding work on the large gear ring 1. The end of the dynamic support plate 12 away from the transition plate 11 is bent in a "┛" shape, as shown in FIG. Figure 2 As described above, the end of the second annular plate 10 close to the dynamic support plate 12 is bent toward the dynamic support plate 12 at the “┛” position, so that the second annular plate 10 is movably buckled on the dynamic support plate 12. In this way, when working, the connecting assembly 5 rotates with the large gear ring 1, while the second annular plate 10 is relatively fixed.

[0029] A reinforcing rib 13 is provided between the transition plate 11 and the large gear ring 1. As can be seen from the above structure, reinforcing ribs 13 are evenly distributed radially between the two side walls of the connection between the transition plate 11 and the large gear ring 1. The reinforcing ribs 13 are perpendicular to the side walls of the transition plate 11 and the large gear ring 1. The reinforcing ribs 13 serve as supporting and reinforcing components for the large gear ring 1 and the transition plate 11. Reinforcing the connection between the large gear ring 1 and the transition plate 11 can prevent deformation of the transition plate 11.

[0030] Example 2:

[0031] See attached Figures 1 to 5. On the basis of embodiment 1, the dynamic baffle assembly 4 includes a dynamic annular axial baffle 14 and a dynamic annular radial baffle; one end of the dynamic annular axial baffle 14 is fixedly connected to the dynamic support plate 12, and the other end is provided with a gap 16 with the first annular plate 9; three dynamic annular radial baffles are respectively provided on both sides of the dynamic annular axial baffle 14; the three dynamic annular radial baffles facing the static support ring 8 are, from left to right, the first dynamic annular radial baffle 17, the second dynamic annular radial baffle 18 and the third dynamic annular radial baffle 19; the three dynamic annular radial baffles facing the second annular plate 10 are, from left to right, the fourth dynamic annular radial baffle 20, the fifth dynamic annular radial baffle 21 and the sixth dynamic annular radial baffle 22. As can be seen from the above structure, one end of the dynamic annular axial baffle 14 is fixedly connected to the dynamic support plate 12, thus dividing the sealing chamber 6 into two upper and lower chambers. A gap 16 is formed between the other end of the dynamic support plate 12 and the first annular plate 9. When located above the large gear ring 1, after the lubricating oil enters the upper sealing chamber 6, it can flow into the lower sealing chamber 6 through the gap 16. Three dynamic annular radial baffles are respectively provided on both sides of the dynamic annular axial baffle 14. The three dynamic annular radial baffles located on the side of the static support ring 8 are, from left to right, the first dynamic annular radial baffle 17, the second dynamic annular radial baffle 18 and the third dynamic annular radial baffle 19, which divide the sealing chamber 6 on that side into a first chamber 30, a second chamber 31, a third chamber 32 and a fourth chamber 33; the three dynamic annular radial baffles facing the side of the second annular plate 10 are, from left to right, the fourth dynamic annular radial baffle 20, the fifth dynamic annular radial baffle 21 and the sixth dynamic annular radial baffle 22, which divide the sealing chamber 6 on that side into a first chamber 30, a second chamber 31, a third chamber 32 and a fourth chamber 33. The sealing chamber 6 is divided into a fifth chamber 34, a sixth chamber 35, a seventh chamber 36, and an eighth chamber 37; there are gaps between the first dynamic annular radial baffle 17, the second dynamic annular radial baffle 18, and the third dynamic annular radial baffle 19 and the static support ring 8, and there are also gaps between the fourth dynamic annular radial baffle 20, the fifth dynamic annular radial baffle 21, and the sixth dynamic annular radial baffle 22 and the second annular plate 10, so that the lubricating oil entering the first chamber 30 will flow into the second chamber 31, the third chamber 32, and the fourth chamber 33, and then flow into the fifth chamber 34, the sixth chamber 35, and the seventh chamber 36 through the gap 16.

[0032] The dynamic annular axial partition 14 and the dynamic support plate 12 are connected with a triangular plate 23. As can be seen from the above structure, the dynamic annular axial partition 14 and the dynamic support plate 12 are connected with a triangular plate 23, which reinforces the connection between the dynamic annular axial partition 14 and the dynamic support plate 12.

[0033] Several oil-collecting baffles 24 are evenly distributed on the side of the dynamic annular axial baffle 14 facing the static support ring 8. These baffles 24 are located between the fifth dynamic annular radial baffle 21 and the sixth dynamic annular radial baffle 22. These baffles 24 are perpendicular to the dynamic annular axial baffle 14, the fifth dynamic annular radial baffle 21, and the sixth dynamic annular radial baffle 22. As can be seen from the above structure, vertical oil-collecting baffles 24 are provided at regular intervals on the side of the dynamic annular axial baffle 14 facing the static support ring 8. These baffles 24 are located between the fifth dynamic annular radial baffle 21 and the sixth dynamic annular radial baffle 22, and are perpendicular to both. This allows lubricating oil flowing into the third chamber 32 to be blocked between the two oil-collecting baffles 24, preventing it from flowing downward. When located below the large ring gear 1, the lubricating oil is collected between the two oil-collecting baffles 24.

[0034] The dynamic annular axial partition 14 is provided with a plurality of return holes; the return holes are evenly located on both sides of the oil collecting baffle 24; a freely sliding return sleeve 25 is nested in the return hole; a return pipe 26 is fixedly provided on the three dynamic annular radial partitions facing the static support ring 8; the return pipe 26 passes through the third dynamic annular radial partition, the second dynamic annular radial partition 18 and the first dynamic annular radial partition in sequence to lead to the space between the large gear ring 1 and the gear cover 2; a through hole is provided on the return pipe 26; the position of the through hole corresponds one-to-one to the position of the return sleeve 25, allowing the lubricating oil passing through the return sleeve 25 to enter the return pipe 26. As can be seen from the above structure, at the oil collecting baffle 24, a number of return holes are provided axially at regular intervals along the annular axial partition. These holes can be provided on only one side of the oil collecting baffle 24, or on both sides. A return sleeve 25 is nested within the return hole and can slide within it. Return pipes 26 are provided on the first dynamic annular radial baffle, the second dynamic annular radial baffle 18, and the third dynamic annular radial baffle. The positions of the return holes correspond to the return pipes 26. One end of the return pipe 26 can be fixed to the third dynamic annular radial baffle or pass through it. The return pipe 26, located below the sealing device, slopes downward, passing through the third dynamic annular radial baffle, the second dynamic annular radial baffle 18, and the first dynamic annular radial baffle in sequence, into the space between the large gear ring 1 and the gear cover 2. Through holes are provided in the return pipe 26, corresponding one-to-one with the return sleeves 25. During operation, the return sleeve 25 above the sealing device rotates with the large gear. When it rotates downward, the return sleeve 25 slides downward into the third chamber 32 under the action of gravity. At this time, the lubricating oil in the seventh chamber 36 can flow into the return pipe 26 through the return sleeve 25, and then return to the large gear ring 1 through the return pipe 26, so that the lubricating oil can be circulated.

[0035] Example 3:

[0036] See attached Figures 1 to 5 . On the basis of the second embodiment, the fourth dynamic annular radial baffle 20 is provided with an annular groove 28 at the end close to the second annular plate 10; the groove is filled with wool felt. As can be seen from the above structure, the fourth dynamic annular radial baffle 20 is provided with an annular groove 28 at the end close to the second annular plate 10, and the groove is filled with wool felt, which performs a sealing block between the fourth chamber 33 and the fifth chamber 34, so that the leaked lubricating oil will not flow into the fourth chamber 33, and ensure that the leaked lubricating oil flows back to between the large ring gear 1 and the ring gear cover.

[0037] The outer wall of the groove is provided with an annular sealing ring 29. As can be seen from the above structure, the outer wall of the groove parallel to the fourth dynamic annular radial partition 20 is connected to the annular sealing ring 29 by screws, so that the fourth chamber 33 and the fifth chamber 34 are further sealed.

[0038] The working principle of the sealing device of this utility model:

[0039] When the large ring gear 1 is at the top, the lubricating oil flows between the large ring gear 1 and the gear cover 2 and then enters the second chamber 31, the third chamber 32, and the fourth chamber 33 through the gap between the first dynamic annular radial baffle 17 and the static support ring 8. The first dynamic annular radial baffle 17 isolates most of the lubricating oil in the first chamber 30 between the large ring gear 1 and the gear cover 2. Some of the lubricating oil that enters the third chamber 32 flows through the return sleeve 25 into the seventh chamber 36. The lubricating oil that enters the fourth chamber 33 flows through the gap 16 into the eighth chamber 37, the seventh chamber 36, and the sixth chamber 35. As the large ring gear 1 rotates, when it is at the top, the lubricating oil between the oil collecting baffle 24 in the seventh chamber 36 flows through the return sleeve 25 into the return pipe 26. Then, through the return pipe 26, it returns to the first chamber 30 and flows back into the large ring gear 1. The lubricating oil in the eighth chamber 37 flows through the gap 16 into the fourth chamber 33, continuing the cycle.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sealing device for a rotary kiln gear ring, arranged between the gear ring (1) and the gear cover (2), characterized in that: The invention comprises a static sealing cover (3), a dynamic baffle assembly (4) and a connecting assembly (5); one end of the static sealing cover (3) is fixedly connected to the gear cover (2), and the other end is connected to one end of the connecting assembly (5); the other end of the connecting assembly (5) is connected to the large gear ring (1); a sealing cavity (6) is formed between the static sealing cover (3), the connecting assembly (5), the large gear ring (1) and the gear cover (2); a dynamic baffle assembly (4) is arranged in the sealing cavity (6); the dynamic baffle assembly (4) is fixedly connected to the large gear ring (1), and divides the sealing cavity (6) into eight chambers; the eight chambers are used to return the leaked lubricating oil to between the large gear ring (1) and the gear cover (2).

2. The sealing device of the rotary kiln large gear ring according to claim 1, characterized in that: The static sealing cover (3) comprises a static sealing cover (7) and a static support ring (8) arranged in an axial direction; the static sealing cover (7) comprises a first annular plate (9) arranged in a radial direction and a second annular plate (10) arranged in an axial direction; one end of the static support ring (8) is fixedly connected to the outer side of the gear cover (2), and the other end is fixedly connected to one end of the first annular plate (9); the other end of the first annular plate (9) is provided with a second annular plate (10); the second annular plate (10) and the static support ring (8) are arranged on the same side of the first annular plate (9); the second annular plate (10) is connected to the large gear ring (1) through a connecting assembly (5).

3. The sealing device of the rotary kiln large gear ring according to claim 2, characterized in that: The connection assembly (5) comprises a transition plate (11) and a dynamic support plate (12); one side of the transition plate (11) is fixedly connected to the side wall of the large gear ring (1), and the other side is fixedly connected to the dynamic support plate (12); the dynamic support plate (12) is embeddedly connected to the second annular plate (10).

4. The sealing device of the rotary kiln large gear ring according to claim 3 is characterized in that: A reinforcing rib plate (13) is provided between the transition plate (11) and the large gear ring (1).

5. The sealing device of the rotary kiln large gear ring according to claim 3, characterized in that: The dynamic baffle assembly (4) comprises a dynamic annular axial baffle (14) and a dynamic annular radial baffle; one end of the dynamic annular axial baffle (14) is fixedly connected to the dynamic support plate (12), and the other end is provided with a gap (16) with the first annular plate (9); three dynamic annular radial baffles are respectively provided on both sides of the dynamic annular axial baffle (14); the three dynamic annular radial baffles facing the static support ring (8) are, from left to right, a first dynamic annular radial baffle (17), a second dynamic annular radial baffle (18) and a third dynamic annular radial baffle (19); the three dynamic annular radial baffles facing the second annular plate (10) are, from left to right, a fourth dynamic annular radial baffle (20), a fifth dynamic annular radial baffle (21) and a sixth dynamic annular radial baffle (22).

6. The sealing device of the rotary kiln large gear ring according to claim 5, characterized in that: A triangular plate (23) is provided at the connection between the dynamic annular axial partition plate (14) and the dynamic support plate (12).

7. The sealing device for the rotary kiln gear ring according to claim 5, characterized in that: A plurality of oil collecting baffles (24) are evenly arranged on the side of the dynamic annular axial baffle (14) facing the static support ring (8); the oil collecting baffles (24) are located between the fifth dynamic annular radial baffle (21) and the sixth dynamic annular radial baffle (22); and the oil collecting baffles (24) are perpendicular to the dynamic annular axial baffle (14), the fifth dynamic annular radial baffle (21) and the sixth dynamic annular radial baffle (22).

8. The sealing device of the rotary kiln large gear ring according to claim 7, characterized in that: The dynamic annular axial partition (14) is provided with a plurality of return holes; the return holes are evenly located on both sides of the oil collecting baffle (24); a freely sliding return sleeve (25) is nested in the return hole; a return pipe (26) is fixedly provided on the three dynamic annular radial partitions facing the static support ring (8); the return pipe (26) passes through the third dynamic annular radial partition (19), the second dynamic annular radial partition (18) and the first dynamic annular radial partition (17) in sequence and leads to between the large gear ring (1) and the gear cover (2); a through hole is provided on the return pipe (26); the position of the through hole corresponds to the position of the return sleeve (25) one by one, so that the lubricating oil passing through the return sleeve (25) enters the return pipe (26).

9. The sealing device of the rotary kiln large gear ring according to claim 8, characterized in that: An annular groove (28) is provided at the end of the fourth dynamic annular radial partition (20) close to the second annular plate (10); the annular groove (28) is filled with wool felt.

10. The sealing device of the rotary kiln large gear ring according to claim 9, characterized in that: An annular sealing ring (29) is provided on the outer side wall of the groove.

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