A leak-resistant seal structure and method
By using a dynamic and static ring labyrinth structure and a lubricating oil film design, the problem of easy wear of the seal in grinding equipment is solved, achieving long-term stability of the sealing effect and equipment safety, while reducing energy consumption and operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING TIMES LANDI ELECTRIC POWER TECH CO LTD
- Filing Date
- 2026-03-19
- Publication Date
- 2026-06-16
AI Technical Summary
The sealing structure of existing grinding technology conversion equipment is prone to wear, leading to material leakage and cold air intrusion, increasing energy consumption and safety hazards. Furthermore, the sealing material cannot compensate for wear on its own, affecting the safety and economy of the equipment.
The labyrinth structure, consisting of a moving ring, a stationary ring, a retaining ring, and a sealing ring, is combined with a spring and a lubricant to form a lubricating oil film. There is no gap between the moving and stationary rings. The springs compensate for wear, and the heat dissipation and lubrication holes reduce frictional heat, thus forming an effective seal.
It effectively prevents external dust and cold air from entering, reduces energy consumption, prevents material leakage, ensures safe and environmentally friendly operation of equipment, and reduces operating costs.
Smart Images
Figure CN122216342A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of sealing for preventing material leakage in advanced grinding technology conversion equipment, and more specifically to a sealing structure and method for preventing material leakage. Technical Background Currently, many grinding technology conversion equipment needs to prevent material leakage. The most common equipment is ball mill and vertical mill. Vertical mill is an innovative grinding technology conversion equipment. It has lower energy consumption, higher automation and grinding efficiency than traditional ball mill. The sealing effect of vertical mill directly affects the safety, economy and environmental protection of the equipment. The grinding barrel of ball mill rotates in a horizontal direction, while the grinding disc of vertical mill rotates in a vertical direction. Both of these devices have material leakage during operation.
[0002] The sealing between the ball mill barrel and the shell, and the sealing between the scraper cavity of the lower shell of the vertical mill and the grinding disc seat, are usually achieved using various packing seals such as felt and packing. While these seals initially provide a seal, after about ten days of operation, the seal wears down significantly, rendering them almost ineffective. Furthermore, the worn seals cannot compensate for the wear themselves. In addition to the wear of the seals themselves, they also wear down the sealing surfaces of the rotating ball mill barrel and the rotating grinding disc seat of the vertical mill. For ease of description, the rotating mill barrel and grinding disc seat will be collectively referred to as the rotating body. Due to the large diameter of the rotating body, the worn sealing surfaces are extremely difficult to repair, affecting the safe operation of the equipment. These seals have a particularly short service life and are prone to wear. Wear of the seals allows a large amount of cold air to enter, increasing energy consumption, reducing thermal efficiency, and causing leakage of large particles and powdery materials, which can easily lead to safety accidents and environmental incidents, increasing the company's operating costs. To address this problem, many engineers have focused on improving sealing materials. However, even the best sealing materials cannot guarantee a good seal and extend their lifespan if issues such as heat dissipation, lubrication, and self-compensation after wear are not resolved. Based on the above analysis, we provide a leak-proof sealing structure and method. Summary of the Invention
[0003] The purpose of this invention is to address the aforementioned problems by providing a leak-proof sealing structure and method that effectively prevents large amounts of external dust and cold air from entering the equipment, reducing energy consumption and improving thermal efficiency. It also prevents the leakage of the sealed material, causes no wear on the original rotating parts of the equipment, ensures safer and more environmentally friendly operation of the equipment, and reduces the operating costs of enterprises.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: A leak-proof sealing structure and method includes: an original equipment housing, an original equipment rotating body, a rotating ring mounted on the rotating body, and a stationary ring mounted on the original equipment housing. The rotating ring has a retaining ring on its side, at least one pusher plate on its outer side, and a rotating annular baffle on its inner side. The stationary ring has a stationary annular baffle and an annular groove. The annular groove has at least one limiting screw hole, and a limiting screw is installed in each limiting screw hole. A sealing ring is placed in the annular groove. The sealing ring has at least one spring and a heat dissipation and lubrication hole, and lubricant is placed in each heat dissipation and lubrication hole. The sealing ring has a limiting hole. A first dustproof ring is installed inside the annular groove, and a second dustproof ring is installed outside the annular groove.
[0005] The moving ring is connected to the original rotating body of the equipment, the stationary ring is connected to the original housing of the equipment, the retaining ring is connected to the moving ring, the pusher plate is connected to the outer surface of the retaining ring, the moving ring baffle has a "trumpet mouth" design, the stationary ring baffle has a "trumpet mouth" design, the stationary ring baffle and the moving ring baffle form a labyrinth structure, the opening of the annular groove faces the inner surface of the moving ring, the limiting screw hole is on the groove, the limiting screw is connected to the limiting screw hole, the sealing ring is placed in the groove, one end of the spring contacts the bottom of the groove, and the other end is connected to the sealing ring, the heat dissipation and lubrication hole is set on the sealing surface of the sealing ring, the lubricant needs to fill the heat dissipation and lubrication hole, the limiting hole is set on the sealing ring, the limiting screw passes through the limiting hole, the first dustproof ring is connected to the inner side of the stationary ring and the inner side of the sealing ring without gap, and the second dustproof ring is connected to the outer side of the stationary ring and the outer side of the sealing ring without gap.
[0006] The working principle of a leak-proof sealing structure and method is characterized by the following: During normal operation, the rotating body of the equipment drives the rotating ring, retaining ring, pusher plate, and rotating annular baffle to rotate. When the material to be sealed falls onto the retaining ring, it is pushed away from the retaining ring by the rotating pusher plate. Only a small amount of dusty material enters the rotating annular baffle and the stationary annular baffle. Because the rotating and stationary annular baffles are designed with a "flared" shape and the lower part is inclined downwards, this part of the dusty material falls under the action of gravity after entering the rotating and stationary annular baffles, detaches from the rotating and stationary annular baffles, and returns to the equipment cavity. At this time, only a very small amount of dusty material enters the sealing ring. Because the second dustproof ring is connected to the outer side of the stationary ring and the outer side of the sealing ring without gaps, and the sealing surface of the sealing ring is in contact with the sealing surface of the rotating ring without gaps, this part of the dusty material is also blocked. The blocked dusty material returns to the equipment under the action of gravity and cannot leak out. Similarly, when external dust and cold air enter the sealing ring, they are blocked by gravity. The first dustproof ring is seamlessly connected to the inner surface of the stationary ring and the inner surface of the sealing ring, ensuring seamless contact between the sealing surface of the stationary ring and the sealing surface of the rotating ring. External dust and cold air are also blocked. During normal operation, the sealing ring is not rotated by the rotating ring under the action of the limiting screw and the limiting hole in the limiting screw hole. Under the action of the spring force, the sealing surface of the sealing ring is in close contact with the sealing surface of the rotating ring. Since the heat dissipation and lubrication holes of the sealing ring are filled with lubricant, a lubricating oil film is formed between the sealing surface of the sealing ring and the inner surface of the rotating ring during operation. The presence of the oil film makes the wear of the sealing surface very small. Even if there is wear, the sealing ring will compensate for the wear under the action of the spring. At the same time, the presence of heat dissipation and lubrication holes removes most of the heat generated between the sealing surfaces due to friction, greatly reducing the temperature between the sealing surfaces and avoiding damage to the sealing ring due to high temperature. When the sealing ring is sealing, the sealing surface is no longer in direct contact with the rotating body, avoiding wear of the rotating body, reducing operating costs, and enabling the equipment to operate stably for a long time.
[0007] The advantages of this invention compared to existing technologies are: it can effectively prevent large amounts of external dust and cold air from entering the equipment, reducing energy consumption and improving thermal efficiency; it can prevent leakage of the sealed material, causing no wear on the original rotating body of the equipment, ensuring safer and more environmentally friendly operation of the equipment, and reducing the operating costs of enterprises.
[0008] The shape and size of this invention can be adjusted according to the actual situation of the on-site rotating equipment, but the principle remains unchanged. The invention and its embodiments have been described above; this description is not restrictive, and the figures shown are only one embodiment of the invention, and the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and, without departing from the spirit of this invention, design similar structures and embodiments without creative effort, all such designs should fall within the protection scope of this invention.
[0009] The main objective of this invention is to effectively prevent large amounts of external dust and cold air from entering the equipment, thereby reducing energy consumption and improving thermal efficiency; to prevent leakage of the sealed material, without causing wear to the original rotating body of the equipment, ensuring safer and more environmentally friendly operation of the equipment, reducing the operating costs of enterprises, and providing a leak-proof sealing structure and method. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the sealing structure and method for the rotating body of a grinding technology conversion device during vertical and horizontal operation. Figure 2 This is a schematic diagram of the dynamic ring, retaining ring, and pusher plate of the sealing structure of this type of equipment. Figure 3 This is a schematic diagram of the sealing ring. Figure 4 This is a schematic diagram of the sealing structure and method for a grinding technology conversion device when the rotating body is running in a parallel horizontal direction. Figure 1 and Figure 4 The only difference is the equipment structure; the sealing principle is the same.
[0011] Reference numerals: 1. Moving ring; 101. Retaining ring; 1011. Pusher plate; 1012. Moving annular baffle; 2. Stationary ring; 201. Stationary annular baffle; 202. Groove; 203. Limiting screw hole; 3. Sealing ring; 301. Limiting hole; 302. Heat dissipation and lubrication hole; 303. Lubricant; 4. Limiting screw; 5. Spring; 6. Second dustproof ring; 7. First dustproof ring; 8. Original equipment housing; 9. Original equipment rotating body. Detailed Implementation
[0012] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.
[0013] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0014] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0015] The present invention will now be described in further detail with reference to the accompanying drawings. The specific implementation process is as follows: The moving ring 1 is connected to the original rotating body 9, the stationary ring 2 is connected to the original housing 8, the retaining ring 101 is connected to the moving ring 1, the pusher plate 1011 is connected to the outer surface of the retaining ring 101, the moving annular baffle 1012 has a "trumpet mouth" design, the stationary annular baffle 201 has a "trumpet mouth" design, the stationary annular baffle 201 and the moving annular baffle 1012 form a labyrinth structure, the opening of the annular groove 202 faces the inner surface of the moving ring 1, the limiting screw hole 203 is on the groove 202, and the limiting screw 4 is connected to the limiting screw hole 202. 3. The sealing ring 3 is placed in the groove 202. One end of the spring 5 contacts the bottom of the groove 202, and the other end is connected to the sealing ring 3. The heat dissipation and lubrication hole 302 is set on the sealing surface of the sealing ring 3. The lubricant 303 needs to fill the heat dissipation and lubrication hole 302. The limiting hole 301 is set on the sealing ring 3. The limiting screw 4 passes through the limiting hole 301. The first dustproof ring 7 is connected to the inner side of the stationary ring 2 and the inner side of the sealing ring 3 without gap. The second dustproof ring 6 is connected to the outer side of the stationary ring 2 and the outer side of the sealing ring 3 without gap.
[0016] During normal operation, the rotating body 9 drives the rotating ring 1, retaining ring 101, pusher plate 1011, and rotating annular baffle 1012 to rotate. When the sealed material falls onto the retaining ring 101, it is pushed away from the retaining ring 101 by the rotating pusher plate 1011. Only a small amount of dusty material enters the rotating annular baffle 1012 and the stationary annular baffle 201. Because the rotating annular baffle 1012 and the stationary annular baffle 201 have a "trumpet mouth" design with the lower part inclined downwards, this part of the dusty material will be contained by gravity. Under the influence of gravity, the dust falls, detaching from the moving annular baffle 1012 and the stationary annular baffle 201, and returns to the equipment cavity. At this time, only a very small amount of dusty material will enter the sealing ring 3. Since the second dustproof ring 6 is connected to the outer side of the stationary ring 2 and the outer side of the sealing ring 3 without gaps, and the sealing surface of the sealing ring 3 is in contact with the sealing surface of the moving ring 1 without gaps, this part of the dusty material is also blocked. The blocked dusty material returns to the equipment under the action of gravity and cannot leak out. In the same principle, external dust and cold air enter the equipment cavity. When sealing ring 3 is in place, since the first dustproof ring 7 is connected to the inner side of the stationary ring 2 and the inner side of the sealing ring 3 without gap, the sealing surface of the stationary ring 2 and the sealing surface of the rotating ring 3 are in contact without gap, and external dust and cold air are also blocked. When the equipment is running normally, the sealing ring 3 will not be driven to rotate by the rotating ring 1 under the action of the limiting screw 4 and the limiting hole 301 in the limiting screw hole 203. Under the action of the spring force of the spring 5, the sealing surface of the sealing ring 3 is in close contact with the inner surface of the rotating ring 1. Since the heat dissipation and lubrication hole 302 of the sealing ring 3 is filled with lubricant 303, a lubricating oil film is formed between the sealing surface of the sealing ring 3 and the inner surface of the rotating ring 1 during operation. The presence of the oil film makes the wear of the sealing surface very small. Even if there is wear, the sealing ring 3 will compensate for the wear under the action of the spring force of the spring 5. At the same time, the presence of the heat dissipation and lubrication hole 302 carries away most of the heat generated between the sealing surfaces due to friction, greatly reducing the temperature between the sealing surfaces and avoiding damage to the sealing ring 3 due to high temperature, so that the equipment can operate stably for a long time.
[0017] The advantages of this invention compared to existing technologies are: it can effectively prevent a large amount of external cold air from entering the equipment, reducing energy consumption and improving thermal efficiency; it can prevent the leakage of sealed materials, causing no wear on the original rotating body of the equipment, ensuring safer and more environmentally friendly operation of the equipment, and reducing the operating costs of enterprises.
[0018] The shape and size of this invention can be adjusted according to the actual situation of the on-site rotating equipment, but the principle remains unchanged. The invention and its embodiments have been described above; this description is not restrictive, and the figures shown are only one embodiment of the invention, and the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and, without departing from the spirit of this invention, design similar structures and embodiments without creative effort, all such designs should fall within the protection scope of this invention.
[0019] The main objective of this invention is to effectively prevent large amounts of external dust and cold air from entering the equipment, thereby reducing energy consumption and improving thermal efficiency; to prevent leakage of the sealed material, without causing wear to the original rotating body of the equipment, ensuring safer and more environmentally friendly operation of the equipment, reducing the operating costs of enterprises, and providing a leak-proof sealing structure and method. Beneficial effects It can effectively prevent large amounts of external dust and cold air from entering the equipment, reducing energy consumption and improving thermal efficiency; it can prevent the leakage of sealed materials, without causing wear on the original rotating parts of the equipment, ensuring safer and more environmentally friendly operation of the equipment, and reducing the operating costs of enterprises.
Claims
1. A leak-proof sealing structure and method, comprising: The original equipment housing 8, the original equipment rotating body 9, the rotating ring 1 mounted on the rotating body 9, and the stationary ring 2 mounted on the original equipment housing 8. The rotating ring 1 has a retaining ring 101 on its side. The retaining ring 101 has at least one pusher plate 1011 on its outer side and a rotating annular baffle 1012 on its inner side. The stationary ring 2 has a stationary annular baffle 201 and an annular groove 202. The annular groove 202 has at least one limiting screw hole 203. The limiting screw hole 203 has a limiting screw 4. The annular groove 202 has a sealing ring 3. The sealing ring 3 has at least one spring 5 and a heat dissipation and lubrication hole 302. The heat dissipation and lubrication hole 302 has a lubricant 303. The sealing ring 3 has a limiting hole 301. The annular groove 202 has a first dustproof ring 7 on its inner side and a second dustproof ring 6 on its outer side. The moving ring 1 is connected to the original rotating body 9, the stationary ring 2 is connected to the original housing 8, the retaining ring 101 is connected to the moving ring 1, the pusher plate 1011 is connected to the outer surface of the retaining ring 101, the moving annular baffle 1012 has a "flared" design, the stationary annular baffle 201 has a "flared" design, the stationary annular baffle 201 and the moving annular baffle 1012 form a labyrinth structure, the opening of the annular groove 202 faces the inner surface of the moving ring 1, the limiting screw hole 203 is on the groove 202, and the limiting screw 4 is connected to the limiting screw hole 203. The sealing ring 3 is placed in the groove 202. One end of the spring 5 contacts the bottom of the groove 202, and the other end is connected to the sealing ring 3. The heat dissipation and lubrication hole 302 is set on the sealing surface of the sealing ring 3. The lubricant 303 needs to fill the heat dissipation and lubrication hole 302. The limiting hole 301 is set on the sealing ring 3. The limiting screw 4 passes through the limiting hole 301. The first dustproof ring 7 is connected to the inner side of the stationary ring 2 and the inner side of the sealing ring 3 without gap. The second dustproof ring 6 is connected to the outer side of the stationary ring 2 and the outer side of the sealing ring 3 without gap.
2. The leak-proof sealing structure and method according to claim 1, characterized in that: The moving ring 1 is connected to the original rotating body 9.
3. The leak-proof sealing structure and method according to claim 1, characterized in that: The stationary ring 2 is connected to the original equipment housing 8.
4. The leak-proof sealing structure and method according to claim 2, characterized in that: The retaining ring 101 is connected to the moving ring 1.
5. The leak-proof sealing structure and method according to claim 4, characterized in that: The pusher plate 1011 is connected to the outer surface of the retaining ring 101.
6. The leak-proof sealing structure and method according to claim 4, characterized in that: The moving annular baffle 1012 has a "trumpet mouth" design.
7. The leak-proof sealing structure and method according to claim 3, characterized in that: The static annular baffle 201 is designed with a "trumpet mouth" shape, and the static annular baffle 201 and the moving annular baffle 1012 form a maze structure.
8. The leak-proof sealing structure and method according to claim 3, characterized in that: The opening of the annular groove 202 faces the inner surface of the moving ring 1.
9. The leak-proof sealing structure and method according to claim 8, characterized in that: The limiting screw hole 203 is on the groove 202.
10. The leak-proof sealing structure and method according to claim 9, characterized in that: The limiting screw 4 is connected to the limiting screw hole 203.
11. The leak-proof sealing structure and method according to claim 1, characterized in that: The sealing ring 3 is placed in the groove 202.
12. The leak-proof sealing structure and method according to claim 1, characterized in that: One end of the spring 5 is in contact with the bottom of the groove 202, and the other end is connected to the sealing ring 3.
13. The leak-proof sealing structure and method according to claim 11, characterized in that: The heat dissipation and lubrication hole 302 is provided on the sealing surface of the sealing ring 3.
14. The leak-proof sealing structure and method according to claim 13, characterized in that: The lubricant 303 needs to fill the heat dissipation and lubrication holes 302.
15. The leak-proof sealing structure and method according to claim 11, characterized in that: The limiting hole 301 is provided on the sealing ring 3, and the limiting screw 4 passes through the limiting hole 301.
16. The leak-proof sealing structure and method according to claim 1, characterized in that: The first dustproof ring 7 is connected to the inner side of the stationary ring 2 and the inner side of the sealing ring 3 without any gap.
17. The leak-proof sealing structure and method according to claim 1, characterized in that: The second dustproof ring 6 is connected to the outer side of the stationary ring 2 and the outer side of the sealing ring 3 without any gap.