Rolling mill sealing assembly applied to complex environment

Abstract

The utility model relates to the technical field of rolling mills, in particular to a rolling mill sealing assembly applied to a complex environment. The utility model provides a rolling mill sealing assembly applied to a complex environment. The rolling mill sealing assembly comprises a movable ring, a static ring, a first sealing mechanism and a second sealing mechanism. When the moving ring is matched with the static ring, a labyrinth channel and a sealing channel which are communicated with each other are formed between the moving ring and the static ring, the labyrinth channel is provided with a plurality of bent paths and located on the outer side of the sealing channel, and the end, away from the sealing channel, of the labyrinth channel is communicated with the external environment. And one end, far away from the labyrinth channel, of the sealing channel is communicated with the external environment. Through the synergistic effect of various sealing structures, invasion of water, dust and oil dirt can be effectively blocked, adaptability is higher, durability is higher, and the service life of the sealing assembly is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill technology, and specifically to a rolling mill sealing assembly applied in complex environments. Background Technology

[0002] Rolling mills are core equipment in steel production. Their bearings face extremely complex operating conditions, placing stringent demands on sealing technology: High loads and impact loads: During rolling, bearings must withstand enormous rolling forces and frequent impact loads, requiring the sealing structure to possess excellent resistance to pressure and deformation; High-temperature environment: Friction between the rolls and steel during rolling generates high temperatures (local temperatures can reach over 1000℃), causing sealing materials to age, harden, and fail easily; Intrusion of multiple contaminants: Water and emulsions: Rolling mill cooling water and lubricating emulsions easily seep into the bearing cavity, causing lubrication failure and corrosion; Iron oxide scale and dust: Splashed iron oxide scale and metal dust during rolling accelerate wear on the sealing surface; Oil and impurities: Lubricating grease mixed with external impurities forms sticky contaminants, further exacerbating sealing failure.

[0003] The commonly used sealing methods for bearings in rolling mills currently have the following drawbacks:

[0004] Single-material seals (such as rubber seals): Poor temperature resistance: Rubber is prone to hardening, cracking, and loss of elasticity at high temperatures; Insufficient wear resistance: Iron oxide scale and metal dust cause rapid wear of the sealing lip; Poor adaptability: It cannot cope with the combined pollution of water, oil, and dust at the same time.

[0005] Labyrinth seal: The non-contact design results in low sealing efficiency and cannot effectively prevent the penetration of water, oil, and emulsions.

[0006] Therefore, there is an urgent need for a sealing structure that is more adaptable and more durable. Utility Model Content

[0007] (I) The problem to be solved by this utility model is: how to design a sealing structure that is more adaptable and more durable.

[0008] (II) Technical Solution

[0009] A rolling mill sealing assembly for use in complex environments includes a dynamic ring, a stationary ring, a first sealing mechanism, and a second sealing mechanism.

[0010] When the moving ring and the stationary ring are engaged, a connected labyrinth channel and a sealed channel are formed between the moving ring and the stationary ring. The labyrinth channel has multiple bends and is located outside the sealed channel. The end of the labyrinth channel away from the sealed channel is connected to the external environment, and the end of the sealed channel away from the labyrinth channel is connected to the external environment.

[0011] The first sealing mechanism and the second sealing mechanism are sequentially disposed within the sealing channel to seal the sealing channel. The first sealing mechanism is located between the second sealing mechanism and the labyrinth channel.

[0012] The first sealing mechanism includes a plurality of micro-protrusion structures electroplated on the inner wall of the sealing channel, and the second sealing mechanism includes at least one skeleton oil seal, which is sleeved inside the sealing channel.

[0013] According to one embodiment of the present invention, the end face of the moving ring facing the stationary ring is provided with an annular groove, and the end face of the stationary ring facing the moving ring is provided with an annular protrusion, and a sealing channel is formed between the annular protrusion and the annular groove.

[0014] According to one embodiment of the present invention, the end face of the moving ring facing the stationary ring is provided with a plurality of annular labyrinth grooves, the labyrinth grooves are coaxially arranged with the moving ring, and the diameter of the plurality of labyrinth grooves decreases sequentially along the radial direction of the moving ring; the end face of the stationary ring facing the moving ring is provided with a plurality of labyrinth protrusions corresponding one-to-one with the labyrinth grooves, and the labyrinth channel is formed between the labyrinth grooves and the labyrinth protrusions.

[0015] According to one embodiment of the present invention, two skeleton oil seals are provided, the two skeleton oil seals are arranged along the axial direction of the moving ring, and a sealing cavity in a sealed state is formed between the two skeleton oil seals.

[0016] According to one embodiment of the present invention, a sealing ring is provided on the inner wall of the moving ring, and the sealing ring is a rubber ring.

[0017] According to one embodiment of the present invention, a blowing mechanism is included, which is used to blow away dust in the maze passage. The blowing mechanism includes a compressed air blowing nozzle and a blowing channel disposed in the stationary ring. One end of the blowing channel is connected to the maze passage, and the compressed air blowing nozzle is sealed and installed at the end of the blowing channel away from the maze passage.

[0018] According to one embodiment of the present invention, multiple purging mechanisms are provided, and the multiple purging mechanisms are arranged around the axis of the stationary ring.

[0019] According to one embodiment of the present invention, a lubricant injection mechanism is included, which is used to inject lubricant into the sealed channel; the lubricant injection mechanism includes a lubricant nozzle and a lubricant channel disposed in the stationary ring, one end of the lubricant channel is connected to the sealed channel, and the lubricant nozzle is sealed and installed at the end of the lubricant channel away from the sealed channel.

[0020] According to one embodiment of the present invention, a temperature detection mechanism is included, which is used to detect the temperature of the stationary ring.

[0021] According to one embodiment of the present invention, a pressure detection mechanism is included, which is used to detect the pressure between the moving ring and the stationary ring.

[0022] The beneficial effects of this utility model are:

[0023] This rolling mill sealing assembly, through the synergistic effect of multiple sealing structures, can effectively prevent the intrusion of water, dust and oil, making it more adaptable and durable, thus ensuring the service life of the sealing assembly. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A schematic diagram provided for an embodiment of this utility model.

[0026] Icons: 1. Shaft; 2. Bearing; 3. Moving ring; 301. Annular groove; 4. Stationary ring; 401. Lubrication channel; 402. Temperature measurement channel; 403. Purge channel; 404. Pressure measurement channel; 405. Annular protrusion; 5. Labyrinth channel; 6. Micro-protrusion structure; 7. Skeleton oil seal; 8. Sealing ring; 10. Lubricant nozzle; 11. Compressed air purging nozzle; 12. Pressure detection connector. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figure 1 As shown, one embodiment of this utility model provides a rolling mill sealing assembly for use in complex environments, including a dynamic ring 3, a stationary ring 4, a first sealing mechanism, and a second sealing mechanism;

[0029] When the moving ring 3 and the stationary ring 4 are engaged, a connected labyrinth channel 5 and a sealing channel are formed between the moving ring 3 and the stationary ring 4. The labyrinth channel 5 has multiple bends and is located outside the sealing channel. The end of the labyrinth channel 5 away from the sealing channel is connected to the external environment, and the end of the sealing channel away from the labyrinth channel 5 is connected to the external environment. The first sealing mechanism and the second sealing mechanism are sequentially arranged in the sealing channel to seal the sealing channel. The first sealing mechanism is located between the second sealing mechanism and the labyrinth channel 5. The first sealing mechanism includes multiple micro-protrusion structures 6 electroplated on the inner wall of the sealing channel, and the second sealing mechanism includes at least one skeleton oil seal 7, which is sleeved in the sealing channel.

[0030] In this embodiment, the outermost labyrinth channel 5 has multiple bends. Due to its special labyrinth structure, it can prevent large external dust particles from entering. In addition, water or oil needs to undergo multiple changes in direction and throttling when passing through, which greatly increases the resistance of water or oil leakage, thereby effectively improving the sealing performance. It is especially suitable for sealing under harsh conditions such as high speed, high pressure, and high temperature.

[0031] The function of micro-protrusion structure 6:

[0032] Increased contact area: The micro-protrusion structure formed by electroplating or spraying can increase the microscopic contact area of ​​the sealing surface, thereby improving the sealing effect. These micro-protrusions form a series of tiny contact points on the contact surface, making the sealing surface fit more tightly at the microscopic level and reducing leakage channels.

[0033] Improved lubrication conditions: The micro-protrusion structure 6 can also improve the lubrication conditions of the sealing contact surface. The lubricating medium (such as oil or water) can form a tiny lubricating film between the micro-protrusions, reducing friction and wear between the sealing surfaces, and also helping to reduce the temperature of the sealing contact surface.

[0034] The vibration during the operation of the rolling mill will cause a slight relative displacement of the sealing contact surface. This displacement will cause the micro-protrusion structure 6 to undergo elastic deformation, thereby changing the contact force distribution between the sealing contact surfaces. When the vibration causes the gap between the sealing contact surfaces to increase, the elastic deformation of the micro-protrusion will increase, thereby providing a greater contact force to compensate for the gap and maintain the sealing effect. Conversely, when the vibration causes the gap to decrease, the elastic deformation of the micro-protrusion will decrease, and the contact force will also decrease, avoiding excessive compression that could damage the sealing surface.

[0035] The skeleton oil seal component 7 is a skeleton-type dustproof oil seal. Under the action of the self-tightening helical spring, the sealing lip of the skeleton-type dustproof oil seal forms a tight contact with the inner wall of the sealing channel. Even under the vibration and pressure changes during the operation of the rolling mill, it can maintain a good sealing effect and effectively prevent the intrusion of cooling water and oil.

[0036] As can be seen, the rolling mill sealing assembly in this embodiment can effectively block the intrusion of water, dust and oil through the synergistic effect of multiple sealing structures, making it more adaptable and durable, thus ensuring the service life of the sealing assembly.

[0037] It should be noted that this rolling mill sealing assembly is mainly used for sealing the rolling mill rolls or the rolling mill speed reducer. Figure 1 Shaft 1 in the text can be either a rolling mill roll or the output shaft of a rolling mill reducer. Figure 1 The bearing 2 in the text can be either a bearing that mates with the rolling mill rolls or a bearing that mates with the output shaft of the rolling mill reducer.

[0038] In this embodiment, as Figure 1 As shown, the end face of the moving ring 3 facing the stationary ring 4 is provided with an annular groove 301, and the end face of the stationary ring 4 facing the moving ring 3 is provided with an annular protrusion 405 corresponding to the annular groove 301. The width of the annular protrusion 405 is smaller than the width of the annular groove 301, so that the above-mentioned sealing channel is formed between the annular protrusion 405 and the annular groove 301.

[0039] Furthermore, multiple annular labyrinth grooves are provided on the end face of the moving ring 3 facing the stationary ring 4. The labyrinth grooves are coaxially arranged with the moving ring 3, and the diameters of the multiple labyrinth grooves decrease sequentially along the radial direction of the moving ring 3. That is, from the outer side to the inner side of the moving ring 3, the diameters of the multiple labyrinth grooves decrease sequentially. Multiple labyrinth protrusions are provided on the end face of the stationary ring 4 facing the moving ring 3, each corresponding to one of the labyrinth grooves. The width of the labyrinth protrusion is smaller than the width of the corresponding labyrinth groove. A labyrinth channel 5 is formed between the labyrinth grooves and the labyrinth protrusions. The labyrinth channel 5 is connected to a sealing channel. The end of the labyrinth channel 5 away from the sealing channel is connected to the external environment, and the end of the sealing channel away from the labyrinth channel 5 is connected to the space located inside the moving ring 3.

[0040] In this embodiment, the micro-protrusion structure 6 formed by electroplating can be formed on the side of the sealing channel located on the moving ring 3, or on the side of the sealing channel located on the stationary ring 4, or electroplating can be performed on both the side of the sealing channel located on the moving ring 3 and the side of the sealing channel located on the stationary ring 4.

[0041] In this embodiment, as Figure 1 As shown, two skeleton oil seals 7 are provided, arranged along the axial direction of the moving ring 3, and located at one end of the sealing channel near the shaft 1. A sealing cavity is formed between the two skeleton oil seals 7 in a sealed state.

[0042] Two skeleton oil seals 7 are located close to the inner sides of the rotating ring 3 and the stationary ring 4. The purpose of these two skeleton oil seals 7 is to prevent external cooling water from entering the equipment through the space between the rotating ring 3 and the stationary ring 4, and to prevent internal oil contaminants from entering the sealing channel, thus ensuring the service life of the rolling mill's sealing assembly. Furthermore, a lubricant, such as graphite or grease, is added to the sealing cavity between the two skeleton oil seals 7 to ensure the lubrication effect of the skeleton oil seals 7.

[0043] Furthermore, it's important to understand that skeleton-type dust seals, with their metal skeleton, provide additional strength and rigidity, enabling them to adapt to various working environments and conditions, including high temperatures, low temperatures, and high pressures. They also exhibit excellent heat resistance, cold resistance, and pressure resistance. Moreover, due to their structural design and material selection, skeleton-type dust seals can maintain good sealing performance over extended periods, reducing the frequency of replacement and maintenance.

[0044] In this embodiment, a sealing ring 8 is provided on the inner wall of the moving ring 3. The sealing ring 8 is made of polytetrafluoroethylene (PTFE). PTFE is almost insoluble in all solvents and has the characteristics of being resistant to acids, alkalis, and various organic solvents. It can be used for a long time at temperatures ranging from -180 to 260°C and has excellent heat and cold resistance. Therefore, the sealing ring 8 can maintain stable performance in high-temperature and oily environments.

[0045] As can be seen, this embodiment uses a combination of multiple sealing structures to achieve sealing. The synergistic effect of these multiple sealing structures can effectively prevent the intrusion of water, dust and oil. Moreover, the combination of elasticity and rigidity can adapt to complex working conditions and extend service life.

[0046] It should be noted that the metal surfaces of the rotating ring 3 and the stationary ring 4 are prone to corrosion in humid environments, and contaminants adhering to the rotating ring 3 and the stationary ring 4 will accelerate the wear of the sealing surface.

[0047] To address this technical problem, in this embodiment, the metal surfaces of the rotating ring 3 and the stationary ring 4 are first subjected to surface hardening treatment (such as nitriding or chrome plating), with a hardened layer thickness of 0.05-0.1 mm. Then, a wear-resistant and corrosion-resistant special coating (such as a ceramic coating or a nano-coating) is uniformly sprayed onto the surfaces of the rotating ring 3 and the stationary ring 4, with a coating thickness of 0.1-0.3 mm. Finally, a fluorosilicone nano-coating with a contact angle >150° is sprayed onto the outermost layer to prevent water and oil adhesion. This significantly improves the durability of the seal in dusty and oily environments, reduces seal failure caused by surface wear, enhances the seal's anti-contamination ability, and makes it suitable for high-dust and high-humidity environments.

[0048] To prevent external dust from entering and clogging the maze passage 5, a purging mechanism is installed. This mechanism includes a compressor, pretreatment equipment, an air tank, compressed air purging nozzles 11, and a purging channel 403 located within the stationary ring 4. One end of the purging channel 403 is connected to the maze passage 5, and the other end is connected to the external environment. The compressed air purging nozzles 11 are sealed and installed at the end of the purging channel 403 furthest from the maze passage 5. The compressor, pretreatment equipment, and air tank are sequentially connected by pipes. The air tank and the compressed air purging nozzles 11 are connected by an outlet pipe, on which a pressure valve and a switching valve are installed.

[0049] Thus, the compressor compresses outside air into high-pressure gas, and then sends this compressed air to a pretreatment device. The pretreatment device filters, cools, dries, and removes oil from the compressed air to remove impurities and moisture, preventing impurities and moisture from entering between the moving ring 3 and the stationary ring 4. The pretreated compressed air is then sent to an air storage tank for storage. The compressed air in the air storage tank is then sent to the compressed air purging nozzle 11 through the outlet pipe and ejected from the compressed air purging nozzle 11.

[0050] Regularly blowing the dust out of the maze passage 5 will prevent it from clogging. It should be noted that the outermost part of the maze passage 5 is usually more prone to clogging, so one end of the blowing channel 403 should be close to the end of the maze passage 5 that is close to the sealed channel, so that the dust is blown out from the inside. Figure 1 The path of the purge channel 403 shown is just one of many paths, and the specific path can be reasonably set. Furthermore, in this embodiment, there is no specific limitation on the number of purge channels 403 and compressed air purge nozzles 11; they can be reasonably selected according to actual conditions. For example, six purge channels 403 can be set, evenly arranged around the axis of the stationary ring 4, with one compressed air purge nozzle 11 installed at the air inlet of each purge channel 403. These six compressed air purge nozzles 11 are supplied with air from the same air storage tank.

[0051] In this embodiment, the mill sealing assembly also includes a lubricant injection mechanism for injecting lubricant into the sealing channel. The lubricant injection mechanism includes a lubricant injection device, a lubrication channel 401 disposed within the stationary ring 4, and a lubricant nozzle 10. One end of the lubrication channel 401 is connected to the sealing channel, and the lubricant nozzle 10 is sealed and installed at the end of the lubrication channel 401 away from the sealing channel.

[0052] It should be noted that the lubricant filling equipment is used to pump lubricant into the lubricant nozzle 10. The lubricant filling equipment is existing technology and typically includes an oil storage tank, a filling pump, a solenoid valve, a back pressure valve, and a throttle valve.

[0053] The oil storage tank is used to store lubricant, the filling pump delivers lubricant to the solenoid valve, the solenoid valve controls the flow direction of the lubricant, the back pressure valve provides pre-pressure for the lubricant, and the throttle valve regulates the flow rate of the lubricant, all working together to ensure that the lubricant is delivered to the lubricant nozzle 10 at appropriate pressure and flow rate.

[0054] In this embodiment, a temperature detection mechanism is installed on the stationary ring 4. The temperature detection mechanism includes a temperature measurement channel 402, a temperature sensor, a microprocessor, a wireless transmitter, and a power module. The temperature measurement channel 402 is located inside the stationary ring 4 and one end of the temperature measurement channel 402 is connected to the external environment. The temperature detection connector 9 is sealed and installed at one end of the temperature measurement channel 402, and the temperature sensor is installed inside the temperature measurement channel 402.

[0055] The temperature sensor converts temperature changes into electrical signals. The signal processing circuit amplifies, filters, and performs analog-to-digital (A / D) conversion on the weak electrical signal output from the temperature sensor to facilitate subsequent wireless transmission. The microprocessor receives the digital signal from the signal processing circuit, processes and encodes it further, and prepares it for transmission to the wireless transmitter. The wireless transmitter uses various communication protocols, such as Wi-Fi, Bluetooth, Zigbee, LoRa, and cellular networks, to send data to the control center or controller in the form of wireless signals. The power module supplies power to all electrical components.

[0056] When bearing 2 is severely worn or has poor lubrication, the rolling mill, being heavy machinery, experiences rapid temperature rise due to the high speed of shaft 1 rotation. Since both the rotating ring 3 and stationary ring 4 are metal parts, their temperatures also rise rapidly. The stationary ring 4, in particular, heats up quickly because it is in direct contact with bearing 2, typically reaching 60℃-80℃ within minutes. Furthermore, the rolling mill will trigger an alarm if the bearing temperature exceeds 60℃, and will require shutdown if it exceeds 90℃.

[0057] In this application, the temperature of the stationary ring 4 is measured by a temperature detection mechanism. When the measured temperature value exceeds the threshold, it indicates that the bearing 2 is severely worn or has poor lubrication. At this time, lubricating oil should be added to the bearing 2 in time or the machine should be stopped in time.

[0058] Furthermore, a pressure detection mechanism is also installed on the stationary ring 4. The pressure detection mechanism includes a pressure detection connector 12, a pressure measurement channel 404, a pressure sensor, a microprocessor, a wireless transmitter, and a power module. The first end of the pressure measurement channel 404 is connected to the sealed channel, and the second end is connected to the external environment. The pressure detection connector 12 is sealed and installed at the second end of the pressure measurement channel 404. The pressure sensor and the pressure detection connector 12 are connected via line communication.

[0059] It should be noted that the operating pressure has a significant impact on the sealing performance. If the pressure inside the sealing cavity between the rotating ring 3 and the stationary ring 4 is too high, it may damage the internal micro-protrusion structure 6 and the skeleton oil seal 7, thereby causing leakage. Conversely, if the pressure is too low, it may lead to a poor seal and fail to effectively prevent media leakage. Therefore, in this embodiment, the pressure sensor monitors changes in internal pressure to determine whether the seal is in normal working condition.

[0060] In this application, the pressure sensor converts the pressure change between the moving ring 3 and the stationary ring 4 into an electrical signal, the signal processing circuit amplifies, filters and performs A / D conversion on the electrical signal, the microprocessor receives the digital signal, encodes and packages it, and the wireless transmitter sends the encoded data out through a wireless signal.

[0061] The power management module provides a stable power supply for the entire system. The control center or controller receives wireless signals, decodes and processes the data to achieve monitoring and control.

[0062] In this way, the pressure change between the moving ring 3 and the stationary ring 4 can be detected in real time, and the current seal can be judged based on the measured pressure value.

[0063] Optionally, the pressure sensor is a MEMS pressure sensor (accuracy ±0.1%FS), and the temperature sensor is a fiber optic temperature sensor (temperature range -50℃ to 300℃).

[0064] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" 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 connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rolling mill sealing assembly for use in complex environments, characterized in that, Includes a rotating ring (3), a stationary ring (4), a first sealing mechanism, and a second sealing mechanism; When the moving ring (3) and the stationary ring (4) are engaged, a connected maze channel (5) and a sealed channel are formed between the moving ring (3) and the stationary ring (4). The maze channel (5) has multiple bends and is located outside the sealed channel. The end of the maze channel (5) away from the sealed channel is connected to the external environment, and the end of the sealed channel away from the maze channel (5) is connected to the external environment. The first sealing mechanism and the second sealing mechanism are sequentially disposed in the sealing channel for sealing the sealing channel. The first sealing mechanism is located between the second sealing mechanism and the labyrinth channel (5). The first sealing mechanism includes a plurality of micro-protrusion structures (6) electroplated on the inner wall of the sealing channel. The second sealing mechanism includes at least one skeleton oil seal (7), which is sleeved in the sealing channel.

2. The rolling mill sealing assembly for use in complex environments according to claim 1, characterized in that, The moving ring (3) has an annular groove (301) on its end face facing the stationary ring (4), and the stationary ring (4) has an annular protrusion (405) on its end face facing the moving ring (3). A sealing channel is formed between the annular protrusion (405) and the annular groove (301).

3. A rolling mill sealing assembly for use in complex environments according to claim 2, characterized in that, The moving ring (3) has a plurality of annular labyrinth grooves on its end face facing the stationary ring (4). The labyrinth grooves are coaxially arranged with the moving ring (3). The diameter of the plurality of labyrinth grooves decreases sequentially along the radial direction of the moving ring (3). The stationary ring (4) has a plurality of labyrinth protrusions on its end face facing the moving ring (3) that correspond one-to-one with the labyrinth grooves. The labyrinth channel (5) is formed between the labyrinth grooves and the labyrinth protrusions.

4. A rolling mill sealing assembly for use in complex environments according to claim 1, characterized in that, Two skeleton oil seals (7) are provided, and the two skeleton oil seals (7) are arranged along the axial direction of the moving ring (3), and a sealing cavity in a sealed state is formed between the two skeleton oil seals (7).

5. A rolling mill sealing assembly for use in complex environments according to claim 1, characterized in that, The inner wall of the moving ring (3) is provided with a sealing ring (8), which is a rubber ring.

6. A rolling mill sealing assembly for use in complex environments according to claim 1, characterized in that, The system includes a purging mechanism for purging dust in the maze passage (5). The purging mechanism includes a compressed air purging nozzle (11) and a purging channel (403) located in the stationary ring (4). One end of the purging channel (403) is connected to the maze passage (5), and the compressed air purging nozzle (11) is sealed and installed at the end of the purging channel (403) away from the maze passage (5).

7. A rolling mill sealing assembly for use in complex environments according to claim 6, characterized in that, Multiple purging mechanisms are provided, and the multiple purging mechanisms are arranged around the axis of the stationary ring (4).

8. A rolling mill sealing assembly for use in complex environments according to claim 1, characterized in that, The device includes a lubricant filling mechanism for injecting lubricant into the sealed channel; the lubricant filling mechanism includes a lubricant nozzle (10) and a lubrication channel (401) disposed in the stationary ring (4), one end of the lubrication channel (401) being connected to the sealed channel, and the lubricant nozzle (10) being sealed and installed at the end of the lubrication channel (401) away from the sealed channel.

9. A rolling mill sealing assembly for use in complex environments according to claim 1, characterized in that, It includes a temperature detection mechanism for detecting the temperature of the stationary ring (4).

10. A rolling mill sealing assembly for use in complex environments according to claim 1, characterized in that, It includes a pressure detection mechanism for detecting the pressure between the moving ring (3) and the stationary ring (4).

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