Self-aligning movable and static ring sealing device for rotary kiln

Abstract

The utility model relates to a self-aligning dynamic and static ring sealing device for a rotary kiln. The self-aligning dynamic and static ring sealing device comprises a dynamic and static ring sealing structure and an aligning pressing assembly, the dynamic and static ring sealing structure is composed of a dynamic ring, a static ring, an axial sealing ring and an end face sealing ring. The axial sealing ring is an inflation and deflation sealing ring; the multiple sets of aligning and pressing assemblies are arranged in the circumferential direction of the static ring, and each set of aligning and pressing assembly is composed of a corrugated pipe, an actuator, a connecting rod and a fixing plate. The rotary kiln end sealing device is suitable for sealing the end of a rotary kiln in the coal pyrolysis or oil shale upgrading process, the structure is simple and reliable, the sealing effect is good, and gas leakage in the kiln can be avoided when a kiln body of a large rotary kiln moves axially.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln sealing technology, and in particular to a rotary kiln end sealing device in coal pyrolysis or oil shale upgrading processes. Background Technology

[0002] In the low-temperature pyrolysis process of coal, vertical kilns and rotary kilns are mainly used as the dry distillation devices. The rotary kiln is constantly rotating during the production process. The material enters from one end and exits from the other end. Both ends of the rotary kiln must have reliable seals to ensure that the coal gas does not escape and the air does not enter the kiln, thus ensuring the safety of on-site personnel and the working environment, and eliminating the possibility of kiln fire.

[0003] Large rotary kilns typically employ hydraulic thrust rollers to propel the kiln body axially, ensuring even wear of the support rollers and tires and preventing grooves from forming on the support rollers. This operating method obviously causes the ends of the kiln body to move accordingly. To ensure the end seals of the rotary kiln remain effective at all times, a sealing method combining internal and external sealing structures is often used (such as the "Rotary Kiln Device" disclosed in Chinese Invention Patent No. CN114754575B and the "A Pre-Carbonized Rotary Kiln Sealing System" disclosed in Chinese Invention Patent No. CN117824351B, etc.). Furthermore, the external sealing structure must move synchronously with the rotary kiln and apply sufficient pressure to the internal sealing structure. On the other hand, when the ends of a large rotary kiln are stationary, they will sag to a certain extent due to their own weight, creating an angle between the end face and the rotation axis. This causes slight jumping and swaying at the ends when the kiln body rotates, thus requiring the external sealing structure to adapt to this movement. Summary of the Invention

[0004] This utility model provides a self-aligning moving and stationary ring sealing device for rotary kilns, which is suitable for sealing the end of rotary kilns in coal pyrolysis or oil shale upgrading processes. It has a simple and reliable structure, good sealing effect, and can prevent gas leakage inside the kiln during axial movement of the kiln body in large rotary kilns.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A self-aligning rotating and stationary ring sealing device for a rotary kiln includes a rotating and stationary ring sealing structure and a self-aligning clamping assembly. The rotating and stationary ring sealing structure consists of a rotating ring, a stationary ring, an axial sealing ring, and an end-face sealing ring. The rotating ring is connected to the rotary kiln body, and the rotating and stationary rings are sealed by a conical sealing surface. The stationary ring has an end-face sealing ring on its inner side that contacts the outer end face of the rotating ring. An annular gap exists between the rotating and stationary rings, and an axial sealing ring is installed within this gap. The axial sealing ring is a gas filling / discharging sealing ring, providing axial sealing. An air inlet is provided at the open end of the corresponding annular gap to connect to an inert gas source, and an air vent is provided at the closed end of the corresponding annular gap; several sets of self-aligning and pressing assemblies are arranged along the circumference of the stationary ring, and each set of self-aligning and pressing assemblies consists of a bellows, an actuator, a connecting rod, and a fixing plate; one end of the bellows is connected to the stationary ring, and the other end of the bellows is closed by the fixing plate; the fixing plate is fixed and stationary, and an actuator is provided at the outer end of the fixing plate; one end of the connecting rod is hinged to the stationary ring, and the other end of the connecting rod is hinged to the push rod of the actuator.

[0007] The rotating ring consists of a rotating ring flange, an inner ring, and an outer ring. The rotating ring flange is connected to the rotary kiln flange by bolts. The rotating ring flange and the inner ring are an integral structure. An outer ring is provided on the outside of the inner ring, and one end of the outer ring is fixed to the rotating ring flange. The inner ring has a rotating ring conical sealing surface at the end away from the rotating ring flange. The outer surface of the inner ring between the rotating ring conical sealing surface and the rotating ring flange is the rotating ring axial sealing surface, and the end face of the inner ring near the rotating ring conical sealing surface is the rotating ring end sealing surface.

[0008] The stationary ring consists of a perforated end plate and a sealing ring, with the perforated end plate and the sealing ring being an integral structure. The annular outer surface of the sealing ring is the axial sealing surface of the stationary ring. A conical sealing surface of the stationary ring is provided on the inner side of the sealing ring near the perforated end plate. An annular groove is provided on the end face of the perforated end plate near the sealing ring, and the end face sealing ring is located in the annular groove.

[0009] The sealing ring has a lubricating oil groove at the corresponding stationary ring conical sealing surface, and the lubricating oil groove is connected to the lubricating oil port on the outer surface of the sealing ring through an internal lubricating oil channel.

[0010] The bellows is provided with connecting flanges at both ends. One connecting flange is connected to the perforated end plate of the stationary ring by screws, and the other connecting flange is connected to the fixing plate by bolts.

[0011] The connecting rod is provided with spherical bearings at both ends; the spherical bearing at one end of the connecting rod is hinged to the lug on the perforated end plate by a pin; the spherical bearing at the other end of the connecting rod is hinged to the actuator push rod by a pin.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) In the dynamic and static ring sealing structure, the dynamic ring and the static ring form an effective seal through the combined action of end face sealing, conical sealing and axial sealing. The sealing effect is good and the structure is simple and reliable.

[0014] 2) Multiple sets of self-aligning and pressing components are arranged circumferentially. Axial force is applied to the stationary ring through the connecting rod, so that the sealing surfaces between the stationary ring and the moving ring are pressed together, effectively isolating the gas inside and outside the kiln.

[0015] 3) Inert gas is introduced into the axial sealing ring through the air inlet. After the axial sealing ring expands, it fits tightly with the axial sealing surfaces of the dynamic ring and the stationary ring to form a reliable seal. At the same time, a part of the inert gas in the axial sealing ring enters the space where the conical sealing surface is located through the air vent, forming a positive pressure gas seal and improving the overall sealing effect.

[0016] 4) The stationary ring can move and swing with the rotating ring, always keeping it coaxial with the rotating ring, ensuring that the sealing surfaces between the two are always tightly fitted, thus achieving a better sealing effect;

[0017] 5) When applied to large rotary kilns equipped with hydraulic thrust rollers that require axial movement, it can effectively prevent gas leakage inside the kiln during axial movement of the kiln body.

[0018] 6) The conical sealing surface is located in the inert gas sealing zone, resulting in less dust ingress at the metal hard seal. At the same time, the use of lubricating grease slows down the wear rate, effectively improving the service life of the device and reducing the frequency of maintenance and replacement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the self-aligning moving and stationary ring sealing device described in this utility model.

[0020] Figure 2 This is a schematic diagram of the dynamic and static ring sealing structure described in this utility model.

[0021] Figure 3 This is a partial structural schematic diagram of the moving ring described in this utility model.

[0022] Figure 4 This is a partial structural schematic diagram of the stationary ring described in this utility model.

[0023] Figure 5 This is a structural schematic diagram of the self-aligning and clamping assembly described in this utility model.

[0024] In the diagram: 1. Rotary kiln 101. Rotary kiln flange 2. Rotary ring 201. Rotary ring flange 202. Rotary ring end sealing surface 203. Rotary ring conical sealing surface 204. Rotary ring axial sealing surface 3. Stationary ring 301. End face sealing ring 302. Stationary ring conical sealing surface 303. Lubricating oil groove 304. Stationary ring axial sealing surface 305. Lubricating oil port 4. Self-aligning clamping assembly 401. Actuator 402. Fixed plate 403. Bellows 404. Connecting rod 405. Spherical bearing 406. Pin 5. Axial sealing ring 501. Vent hole 502. Sealing ring body 503. Inlet Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0026] like Figures 1-5 As shown, the self-aligning moving and stationary ring sealing device for a rotary kiln of this utility model includes a moving and stationary ring sealing structure and a self-aligning clamping assembly; the moving and stationary ring sealing structure consists of a moving ring 2, a stationary ring 3, an axial sealing ring 5, and an end face sealing ring 301; the moving ring 2 is connected to the kiln body of the rotary kiln 1, and the moving ring 2 and the stationary ring 3 are sealed by a conical sealing surface; the stationary ring 3 has an end face sealing ring 301 on its inner side that contacts the outer end face of the moving ring 2; there is an annular gap between the moving ring 2 and the stationary ring 3, and the axial sealing ring 5 is provided in the annular gap; as Figure 2 As shown, the axial sealing ring 5 is a gas filling and defilling sealing ring. The axial sealing ring 5 has a gas filling port 503 at the open end of the corresponding annular gap, which is connected to an inert gas source, and a gas venting hole 501 at the closed end of the corresponding annular gap. The self-aligning clamping assembly 4 is arranged in several groups along the circumference of the stationary ring 3. Each group of self-aligning clamping assembly 4 consists of a bellows 403, an actuator 401, a connecting rod 404, and a fixing plate. One end of the bellows 403 is connected to the stationary ring 3, and the other end of the bellows 403 is closed by the fixing plate 402. The fixing plate 402 is fixed and stationary. The actuator 401 is provided at the outer end of the fixing plate 402. One end of the connecting rod 404 is hinged to the stationary ring 3, and the other end of the connecting rod 404 is hinged to the push rod of the actuator 401.

[0027] like Figure 3 As shown, the rotating ring 2 consists of a rotating ring flange 201, an inner ring, and an outer ring. The rotating ring flange 201 is connected to the rotary kiln flange 101 by bolts. The rotating ring flange 201 and the inner ring are an integral structure. An outer ring is provided on the outside of the inner ring, and one end of the outer ring is fixedly connected to the rotating ring flange 201. The inner ring has a rotating ring conical sealing surface 203 at the end away from the rotating ring flange 201. The outer surface of the inner ring between the rotating ring conical sealing surface 203 and the rotating ring flange 201 is the rotating ring axial sealing surface 204, and the end face of the inner ring near the rotating ring conical sealing surface 203 is the rotating ring end sealing surface 202.

[0028] like Figure 4As shown, the stationary ring 3 is composed of a perforated end plate and a sealing ring, and the perforated end plate and the sealing ring are an integral structure; the annular outer surface of the sealing ring is the stationary ring axial sealing surface 304, the inner side of the sealing ring near the perforated end plate is provided with a stationary ring conical sealing surface 302, the end face of the perforated end plate near the sealing ring is provided with an annular groove, and the end face sealing ring 301 is provided in the annular groove.

[0029] The sealing ring has a lubricating oil groove 303 at the corresponding stationary ring conical sealing surface 302, and the lubricating oil groove 303 is connected to the lubricating oil port 305 on the outer surface of the sealing ring through an internal lubricating oil channel.

[0030] like Figure 5 As shown, the bellows 403 is provided with connecting flanges at both ends. One connecting flange is connected to the perforated end plate of the stationary ring 3 by screws, and the other connecting flange is connected to the fixing plate 402 by bolts.

[0031] The connecting rod 404 is provided with spherical bearings 405 at both ends; the spherical bearing 405 at one end of the connecting rod 404 is hinged to the lug on the perforated end plate via a pin 406; the spherical bearing 405 at the other end of the connecting rod 404 is hinged to the push rod of the actuator 401 via a pin 406.

[0032] The working method of the self-aligning moving and stationary ring sealing device for rotary kilns described in this utility model is as follows:

[0033] 1) After the self-aligning moving and stationary ring sealing device is installed at the end of the rotary kiln 1, the end sealing surface 202 of the moving ring is fitted with the end face sealing ring 301 to form an end face seal, the conical sealing surface 203 of the moving ring is fitted with the conical sealing surface 302 of the stationary ring to form a conical surface seal, and the axial sealing surface 204 of the moving ring and the axial sealing surface 304 of the stationary ring are connected by the axial sealing ring 5 to form an axial seal.

[0034] 2) After the rotary kiln 1 is put into use, the push rod of the actuator 401 extends and applies axial force to the stationary ring 3 through the connecting rod 404, so that the sealing surfaces between the stationary ring 3 and the rotating ring 2 are pressed together, isolating the gas inside and outside the kiln; inert gas is injected into the axial sealing ring 5 through the air inlet 503. After the axial sealing ring 5 expands, it is pressed tightly against the axial sealing surface 204 of the rotating ring and the axial sealing surface 304 of the stationary ring to form a reliable seal; at the same time, a part of the inert gas in the axial sealing ring 5 enters the internal sealing space through the air outlet 501 to form a positive pressure gas seal and improve the overall sealing effect.

[0035] 3) When the rotary kiln 1 undergoes axial displacement, the moving ring 2 moves accordingly. When the rotary kiln 1 moves away from the stationary ring 3, the actuator 401 causes the stationary ring 3 to move axially along with the moving ring 2 via the connecting rod 404, keeping the sealing surfaces pressed together. When the rotary kiln 1 moves closer to the stationary ring 3, and the axial force of the rotary kiln 1 is greater than the total pushing force of the actuator 401, the stationary ring 3 pushes the push rod of the actuator 401 back through the connecting rod 404, keeping the pressure between the conical sealing surface 203 of the moving ring and the conical sealing surface 302 of the stationary ring within a reasonable range, ensuring that the conical sealing surface will not be excessively worn or overheated. Once the axial displacement of the rotary kiln 1 causes the conical sealing surfaces between the moving ring 2 and the stationary ring 3 to separate, the axial sealing ring 5 and the gas seal formed by the inert gas injected through the vent hole 501 can still effectively isolate the gas inside and outside the kiln.

[0036] 4) When the end of the rotary kiln 1 deflects downward, the moving ring 2 swings accordingly, and the center line of the moving ring 2 forms an angle with the rotation center line of the rotary kiln 1. As the rotary kiln 1 rotates, the sealing surfaces of the moving ring 2 swing periodically, that is, some points on the circumference of the moving ring 2 move away from the stationary ring 3 and some points move closer to the stationary ring 3. Under the squeezing action of the conical sealing surface 203 of the moving ring on the conical sealing surface 302 of the stationary ring, the stationary ring 3 is forced to always be coaxial with the moving ring 2, thereby making the stationary ring 3 swing synchronously with the moving ring 2. The axial displacement of each point on the circumference of the stationary ring 3 with the moving ring 2 causes the corresponding actuator 401 push rod to extend or shorten, thereby ensuring that each point on the conical sealing surface can maintain sufficient clamping force.

[0037] To more intuitively illustrate this utility model, the implementation methods of this utility model will be further described in conjunction with the embodiments. The following embodiments are merely preferred specific implementations of this utility model, but the protection scope of this utility model is not limited thereto. Any technical solutions that can be obviously obtained by those skilled in the art within the technical scope disclosed in this utility model, including simple variations or equivalent substitutions, are all within the protection scope of this utility model.

[0038]

Example

[0039] like Figures 1-5 As shown, in this embodiment, the self-aligning moving and stationary ring sealing device consists of a moving ring 2 connected to the kiln body of the rotary kiln 1, a stationary ring 3, an end face sealing ring 301, an axial sealing ring 5, a lubrication structure, and a self-aligning clamping assembly 4.

[0040] The rotating ring 2 rotates synchronously with the kiln body of the rotary kiln 1. The stationary ring 3 is coaxially arranged with the rotating ring 2 and is pressed against the rotating ring 2 by the pushing of the self-aligning clamping assembly 4. The end sealing surface 202 of the rotating ring presses against the axial sealing ring 301 fixed in the stationary ring 3 to form an end face seal; the conical sealing surface 203 of the rotating ring and the conical sealing surface 302 of the stationary ring cooperate to form a conical seal (hard seal); an axial sealing ring 5 is provided between the axial sealing surface 204 of the rotating ring and the axial sealing surface 304 of the stationary ring to form an axial seal.

[0041] In this embodiment, the rotating ring 2 is composed of a rotating ring flange 201, an inner ring, and an outer ring. The rotating ring 2 is fixedly connected to the kiln body of the rotary kiln 1 via the rotating ring flange 201 (using bolt connection), so that the rotating ring 2 can rotate synchronously with the kiln body. The inner ring is provided with a rotating ring end sealing surface 202 and a rotating ring conical sealing surface 203, and the inner side of the outer ring is provided with a rotating ring axial sealing surface 203 coaxial with the rotary kiln 1.

[0042] In this embodiment, the stationary ring 3 is provided with an end face sealing ring 301, a stationary ring conical sealing surface 302, a stationary ring axial sealing surface 304, and a lubrication structure composed of a lubricating oil groove 303, an internal lubricating oil passage, and a lubricating oil port 305. The stationary ring 3 is coaxially arranged with the rotary kiln 1. The end face sealing ring 301 is located at one end of the stationary ring 3 corresponding to the gas escape direction inside the rotary kiln 1 and cooperates with the end sealing surface 202 of the rotating ring. The stationary ring conical sealing surface 302 cooperates with the rotating ring conical sealing surface 203. A lubricating oil groove 303 is provided on the inner side of the stationary ring conical sealing surface 302, which is connected to the lubricating oil port 305 through the internal lubricating oil passage. The stationary ring axial sealing surface 304 is located at one end corresponding to the gas outflow direction in the kiln, and is coaxially arranged with the rotating ring axial sealing surface 204 (both the stationary ring axial sealing surface 304 and the rotating ring axial sealing surface 204 are annular surfaces). An annular gap is formed between the rotating ring axial sealing surface 204 and the stationary ring axial sealing surface 304, and an axial sealing ring 5 is set in the annular gap.

[0043] In this embodiment, the axial sealing ring 5 is an inflatable and deflatable sealing ring that can be inflated at one end and deflated at the other end. The cross-section of the axial sealing ring 5 is annular, that is, it has an annular cavity. It has a vent hole 501 on one side corresponding to the internal sealed space and an inflation port 503 on the other side corresponding to the open space. The diameter of the inflation port 503 is larger than the diameter of the vent hole 501. The inflation port 503 is connected to an inert gas source.

[0044] In this embodiment, the self-aligning clamping assembly 4 consists of a bellows 403, a connecting rod 404, an actuator 401, and a fixing plate 402. The bellows 403 is coaxially arranged with the rotary kiln 1. One end of the bellows 403 is fixedly connected to the stationary ring 3, and the other end is connected to the fixing plate 402. Four sets of actuators 401 are evenly arranged around the fixing plate 402. The body of the actuator 401 is fixedly connected to the fixing plate 402. The push rod of the actuator 404 is connected to the stationary ring 3 through the connecting rod 404. One end of the connecting rod 404 is hinged to the stationary ring 3, and the other end is hinged to the push rod of the actuator 401.

[0045] The stationary ring 3 is connected to the fixed plate 402 via the bellows 403. The fixed plate 402 is fixed in place. Due to the flexibility of the bellows 403, the stationary ring 3 can have a certain displacement and swing relative to the fixed plate 402.

[0046] In this embodiment, the actuator 401 is installed on the outside of the fixed plate 402. The push rod of the actuator 401 is hinged to one end of the connecting rod 404 through the spherical bearing 405 and the pin 406. The other end of the connecting rod 404 is connected to the stationary ring 3 in the same way. After installation, the self-aligning clamping assembly 4 can make the stationary ring 3 move by the action of the push rod of the actuator 401.

[0047] When installing the self-aligning moving and stationary ring sealing device, the moving ring 2 and the stationary ring 3 are first brought into contact by moving the fixed plate 402. The end sealing surface 202 of the moving ring is in contact with the end face sealing ring 301 inside the stationary ring to form an end face seal. The conical sealing surface 203 of the moving ring is in contact with the conical sealing surface 204 of the stationary ring to form a conical surface seal. The axial sealing surface 204 of the moving ring and the axial sealing surface 304 of the stationary ring are fitted together, forming an axial seal together with the axial sealing ring 5 placed between them.

[0048] When the self-aligning stationary and moving ring sealing device is working, the fixed plate 402 remains stationary, and the actuator 401 push rod extends with a certain force. Since the actuator 401 is fixedly connected to the fixed plate 402, the push rod of the actuator 401 presses the sealing surfaces between the stationary ring 3 and the moving ring 2 through the connecting rod 404, so as to achieve the purpose of isolating the gas inside and outside the kiln.

[0049] Inert gas is injected into the axial sealing ring 5 through the air inlet 503 located on the sealing ring body 5, forming a certain pressure inside the axial sealing ring 5. This causes the axial sealing ring 5 to expand and press against the axial sealing surface 204 of the moving ring and the axial sealing surface 304 of the stationary ring, respectively. At the same time, the inert gas enters the internal sealing space sealed by the axial sealing ring 5 through the vent hole 501, forming a positive pressure gas seal and improving the overall sealing effect of the device.

[0050] When the rotary kiln 1 undergoes axial displacement, the moving ring 2 will also move synchronously. Assuming the rotary kiln 1 moves away from the stationary ring 3, the push rod of actuator 401 is extended, allowing the stationary ring 3 to move axially with the moving ring 2 via connecting rod 404, thus keeping the sealing surfaces pressed together. Assuming the rotary kiln 1 moves closer to the stationary ring 3, when the axial force of the rotary kiln 1 exceeds the sum of the pushing forces of all actuators 1, the stationary ring 3 will push the push rod of actuator 401 back through connecting rod 404, keeping the pressure between the moving ring conical sealing surface 204 and the stationary ring conical sealing surface 304 within a reasonable range, thus ensuring that the conical sealing surfaces do not wear excessively or overheat. If, for some reason, the axial displacement of the rotary kiln 1 causes the two conical sealing surfaces of the moving ring 2 and the stationary ring 3 to separate, the gas seal formed by the axial sealing ring 5 and the inert gas injected through the vent hole 501 can still keep the gases inside and outside the kiln isolated.

[0051] When the end of the rotary kiln 1 deflects downwards, the rotating ring 2 will also swing accordingly, with its centerline forming an angle with the rotation centerline of the rotary kiln 1. As the rotary kiln 1 rotates, the sealing surfaces of the rotating ring 2 will also swing periodically, meaning that some points on the circumference of the rotating ring 2 move away from the stationary ring 3 while others move closer to it. Under the squeezing action of the rotating ring conical sealing surface 203 on the stationary ring conical sealing surface 302, the stationary ring 3 is forced to remain coaxial with the rotating ring 2, thus causing the stationary ring 3 to swing synchronously with the rotating ring 2. The axial displacement of each point on the circumference of the stationary ring 3 caused by the rotating ring 2 will cause the corresponding actuator 401 push rod to extend or shorten, thereby ensuring that each point on the conical sealing surface maintains a certain clamping force.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-aligning dynamic and static ring sealing device for a rotary kiln, characterized in that, The application relates to a rotary kiln with a dynamic-static ring sealing structure and a centering and pressing assembly.

2. The self-aligning dynamic and static ring sealing device for rotary kiln according to claim 1, characterized in that, The dynamic ring is composed of a dynamic ring flange, an inner ring and an outer ring; the dynamic ring flange is connected with the rotary kiln flange through bolts; the dynamic ring flange and the inner ring are an integral structure; the outer side of the inner ring is provided with the outer ring; one end of the outer ring is fixedly connected with the dynamic ring flange; the inner ring is provided with a dynamic ring conical sealing surface at the end far from the dynamic ring flange; the outer surface of the inner ring between the dynamic ring conical sealing surface and the dynamic ring flange is a dynamic ring axial sealing surface; the inner ring end surface close to the dynamic ring conical sealing surface is a dynamic ring end sealing surface.

3. The self-aligning dynamic and static ring sealing device for rotary kiln according to claim 1, characterized in that, The static ring is composed of a hole-end plate and a sealing ring; the hole-end plate and the sealing ring are an integral structure; the annular outer surface of the sealing ring is a static ring axial sealing surface; the inner side of the sealing ring close to the hole-end plate is provided with a static ring conical sealing surface; the hole-end plate end surface close to the sealing ring is provided with an annular groove; and the end sealing ring is arranged in the annular groove.

4. The self-aligning dynamic and static ring sealing device for rotary kiln according to claim 3, characterized in that, The sealing ring is provided with a lubricating oil groove at the position corresponding to the static ring conical sealing surface; the lubricating oil groove is connected with a lubricating oil port arranged on the outer side surface of the sealing ring through an internal lubricating oil channel.

5. The self-aligning static and dynamic ring sealing device for a rotary kiln of claim 1, wherein, The connecting flanges are arranged at the two ends of the bellows; one end of the connecting flanges is connected with the hole-end plate of the static ring through screws; and the other end of the connecting flanges is connected with the fixed plate through bolts.

6. The self-aligning static and dynamic ring sealing device for a rotary kiln of claim 1, wherein, The joint bearings are arranged at the two ends of the connecting rod; the joint bearing at one end of the connecting rod is hingedly connected with an ear seat arranged on the hole-end plate through a pin shaft; and the joint bearing at the other end of the connecting rod is hingedly connected with the push rod of the actuator through a pin shaft.

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