Rotary cylinder feeding sealing device

Abstract

The utility model relates to the technical field of rotary cylinder sealing, and particularly discloses a rotary cylinder feeding sealing device which comprises a cylinder and a flange arranged at the end of the cylinder, a friction ring is installed at the position of a feeding port of the cylinder, and the friction ring is arranged on the outer wall of the cylinder in a sleeved mode and rotates along with the cylinder. A gap is formed between the bottom of the friction ring and the outer wall of the barrel, and a packing packing sealing part is arranged in the gap; the end, away from the friction ring, of the first sealing mechanism is connected with the flange through a plurality of axial supplementing mechanisms, and the other end of the first sealing mechanism is dynamically connected with the friction ring in an attached mode. One end, close to the friction ring, of the second sealing mechanism is connected with the friction ring, and the bottom of the second sealing mechanism is in contact connection with the outer wall of the cylinder body; the sliding supporting assembly is arranged at the bottom of the device, and the top of the sliding supporting assembly is connected with the first sealing mechanism; the problems that a traditional rotary cylinder feeding sealing device is poor in sealing effect and inconvenient to maintain are solved.

Description

Technical Field

[0001] This utility model relates to the field of rotary cylinder sealing technology, specifically to a rotary cylinder feeding sealing device. Background Technology

[0002] Rotary cylinders (such as rotary kilns, ball mills, and dryers) are widely used in industries such as cement, mining, chemicals, and food. The sealing of their feed end is a key factor in ensuring the stable operation of the equipment. During material conveying and processing, the rotary cylinder rotates continuously, and the feed inlet must simultaneously meet the requirements of dynamic rotation sealing and stable material conveying. If the seal fails, problems such as material leakage, dust overflow polluting the environment, or external air intrusion affecting the process temperature inside the cylinder and product quality may occur.

[0003] Existing rotary drum feeding sealing devices have several shortcomings: some contact seals are prone to rapid wear due to axial movement and radial runout during rotary drum operation, requiring frequent maintenance and replacement, increasing production costs and downtime; labyrinth seals require high manufacturing and installation precision, and relying solely on labyrinth throttling is insufficient to completely prevent dust and gas leakage; single sealing structures are difficult to adapt to complex working conditions, resulting in poor sealing reliability and durability. Therefore, there is an urgent need for a rotary drum feeding sealing device with a more reasonable structure, better sealing effect, stronger adaptability, and easier maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a rotary cylinder feeding sealing device, which solves the problems of poor sealing effect and inconvenient maintenance that are common in traditional rotary cylinder feeding sealing devices.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A rotary cylinder feeding and sealing device includes: a cylinder, a flange fixedly provided at one end of the cylinder, a friction ring installed at the feed inlet of the cylinder, the friction ring being sleeved on the outer wall of the cylinder and rotating with the cylinder; a gap is provided between the bottom of the friction ring and the outer wall of the cylinder, and a packing sealing part is provided in the gap; a first sealing mechanism is provided on the left side of the friction ring, one end of the first sealing mechanism away from the friction ring is connected to the flange through multiple axial supplementary mechanisms, and the other end is dynamically fitted and connected to the friction ring; a second sealing mechanism is provided on the right side of the friction ring, one end of the second sealing mechanism near the friction ring is connected to the friction ring, and its bottom is in contact with the outer wall of the cylinder; and a sliding support assembly is provided at the bottom of the device, the top of the sliding support assembly being connected to the first sealing mechanism.

[0007] A further technical solution is that the first sealing mechanism includes a mounting base and a first sealing ring. Both the mounting base and the first sealing ring are sleeved on the outer wall of the cylinder. The first sealing ring is dynamically fitted and connected to the friction ring. The mounting base is fixedly connected to the first sealing ring. The side of the mounting base away from the first sealing ring is fixedly connected to the flange through multiple axial supplementary mechanisms.

[0008] A further technical solution is that the second sealing mechanism includes a second sealing ring and a sealing pressure plate. The bottom of the second sealing ring is in close contact with the outer wall of the cylinder. One side of the second sealing ring is connected to the friction ring, and the other side is connected to the sealing pressure plate.

[0009] A further technical solution is that multiple axial compensation mechanisms are evenly distributed along the circumferential direction on the mounting base. Each axial compensation mechanism includes a screw and a compression spring. One end of the screw is fixedly connected to the mounting base, and the other end is fixedly connected to the flange. The compression spring is sleeved on the screw and is located between the mounting base and the flange. One end of the compression spring is connected to the flange, and the other end is connected to a nut sleeved on the screw.

[0010] A further technical solution is that the sliding support assembly includes a support base and a roller, with the roller fixedly disposed at the bottom of the support base; the top of the support base is fixedly connected to the mounting base.

[0011] A further technical solution is that the first sealing ring is a polytetrafluoroethylene (PTFE) sealing ring, the packing seal is a PTFE sealing packing, and the second sealing ring is a high-temperature resistant sealing ring.

[0012] A further technical solution is that the end of the cylinder is also provided with an air sealing mechanism, which includes an air pressure pipe that penetrates the cylinder and the outlet of the air pressure pipe is connected to the packing seal.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model provides a rotary cylinder feeding sealing device that uses a PTFE sealing ring and a friction ring to dynamically fit their end faces, thus blocking the axial dust escape path; PTFE sealing packing fills the gap between the friction ring and the outer wall of the cylinder to seal radial gap leakage; a high-temperature resistant sealing ring is fitted to the outer wall of the cylinder, allowing the entire device to withstand high-temperature conditions and preventing internal leakage; an axial compensation mechanism automatically compensates for axial displacement to maintain a constant pressure on the sealing surface, and the spring preload in the axial compensation mechanism can be adjusted by a nut to adapt to different axial displacement conditions, avoiding overpressure damage or underpressure leakage; a sliding support assembly at the bottom of the device improves the stability of the entire device, eliminates cylinder vibration transmission, and prevents resonance fatigue of the sealing structure; and each sealing component can be replaced independently without overall disassembly, greatly shortening maintenance time. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a rotary cylinder feeding sealing device provided by this utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of the rotary cylinder feeding sealing device provided by this utility model.

[0017] Icons: 1. Flange, 2. Cylinder, 3. Friction ring, 4. Packing seal, 5. Mounting seat, 6. First sealing ring, 7. Second sealing ring, 8. Sealing plate, 9. Screw, 10. Compression spring, 11. Nut, 12. Support seat, 13. Support roller. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Example 1

[0020] This utility model embodiment provides a rotary cylinder feeding sealing device, such as Figure 1As shown, the device includes: a cylindrical body 2, with a flange 1 fixedly mounted at one end; a friction ring 3 installed at the feed inlet of the cylindrical body 2, the friction ring 3 being sleeved on the outer wall of the cylindrical body 2 and rotating with the cylindrical body 2; a gap is provided between the bottom of the friction ring 3 and the outer wall of the cylindrical body 2, and a packing seal 4 is provided in the gap; a first sealing mechanism is provided on the left side of the friction ring 3, one end of the first sealing mechanism away from the friction ring 3 being connected to the flange 1 through multiple axial supplementary mechanisms, and the other end being dynamically fitted and connected to the friction ring 3; a second sealing mechanism is provided on the right side of the friction ring 3, one end of the second sealing mechanism near the friction ring 3 being connected to the friction ring 3, and its bottom being in contact with the outer wall of the cylindrical body 2; and a sliding support assembly located at the bottom of the device, the top of which is connected to the first sealing mechanism.

[0021] In embodiments of the present invention, such as Figure 2 As shown, a flange 1 is fixed at the end of the cylinder 2 by welding or bolting. A friction ring 3 is installed at the feed inlet of the cylinder 2. The cross-sectional structure of the friction ring 3 is designed as an I-beam. The friction ring 3 is fitted onto the outer wall of the cylinder 2, allowing the friction ring 3 to rotate with the cylinder 2 and maintain a certain degree of concentricity with the outer wall of the cylinder 2 during rotation. This installation method of the friction ring 3 and the cylinder 2 allows the friction ring 3 to rotate synchronously with the cylinder 2, providing a stable rotational foundation for the subsequent sealing structure. A gap is provided between the bottom of the friction ring 3 and the outer wall of the cylinder 2. The gap is filled with a packing seal 4. The packing seal 4 can fill the gap between the friction ring 3 and the outer wall of the cylinder 2, playing a preliminary sealing role and preventing material leakage from the gap. The packing seal 4 is made of polytetrafluoroethylene (PTFE) packing. When filling, it should be ensured that the packing is evenly and tightly filled into the gap to achieve a good preliminary sealing effect.

[0022] Furthermore, a first sealing mechanism is provided on the left side of the friction ring 3. The end of the first sealing mechanism away from the friction ring 3 is connected to the flange 1 through multiple axial supplementary mechanisms, and the other end is dynamically fitted to the friction ring 3. The dynamic fit between the first sealing mechanism and the friction ring 3 can maintain good sealing contact during the rotation of the cylinder 2, further improving the sealing effect. A second sealing mechanism is provided on the right side of the friction ring 3. The end of the second sealing mechanism near the friction ring 3 is connected to the friction ring 3, and its bottom is in contact with the outer wall of the cylinder 2. The second sealing mechanism seals from the other side of the friction ring 3, forming multiple sealing lines together with the first sealing mechanism and the packing seal 4, enhancing the overall sealing performance. A sliding support assembly is also provided at the bottom of the device. The top of the sliding support assembly is connected to the first sealing mechanism. The sliding support assembly can provide stable support for the first sealing mechanism, ensuring the stability of the first sealing mechanism during operation, and also helping to reduce the friction between the first sealing mechanism and the cylinder 2.

[0023] In this embodiment of the utility model, the first sealing mechanism includes a mounting base 5 and a first sealing ring 6. Both the mounting base 5 and the first sealing ring 6 are sleeved on the outer wall of the cylinder 2. The first sealing ring 6 is selected as a polytetrafluoroethylene (PTFE) sealing ring. PTFE has good wear resistance, corrosion resistance, and self-lubricating properties, which can improve the service life of the sealing components. The first sealing ring 6 is dynamically fitted with the friction ring 3 to ensure that the fitting surface is flat and tight. Then, the mounting base 5 and the first sealing ring 6 are fixedly connected by bolts. Then, the end of the mounting base 5 away from the first sealing ring 6 is fixedly connected to the flange 1 through multiple axial compensation mechanisms. This structural design allows the first sealing ring 6 to automatically adjust its fit with the friction ring 3 according to the wear condition under the action of the axial compensation mechanisms, ensuring the sealing effect. Furthermore, multiple axial compensation mechanisms are evenly distributed on the mounting base 5 along the circumferential direction. The axial compensation mechanism includes a screw 9 and a compression spring 10. One end of the screw 9 is fixedly connected to the mounting base 5, and the screw 9 can be connected to the mounting base 5. 5. A fixing nut 11 is installed at the connection position. The other end passes through the corresponding hole on the flange 1 and is fixedly connected to the flange 1 through the fixing nut 11. The compression spring 10 is sleeved on the screw 9, and the compression spring 10 is located between the mounting base 5 and the flange 1. One end of the compression spring 10 is fixedly connected to the flange 1, and the other end is connected to the nut 11 sleeved on the screw 9. The position of the nut 11 is adjusted so that the compression spring 10 is in an appropriate compressed state, providing preload force for the first sealing ring 6. The axial compensation mechanism can automatically compensate for the wear of the first sealing ring 6 during use through the elastic force of the compression spring 10, ensuring that the first sealing ring 6 and the friction ring 3 always maintain good sealing contact. In addition, during the operation of the device, the wear of the sealing components can be checked periodically. When it is found that the wear of the first sealing ring 6 has caused the gap between it and the friction ring 3 to increase, the position of the nut 11 is adjusted so that the mounting base 5 drives the first sealing ring 6 to move towards the friction ring 3, automatically compensating for the wear gap and restoring a good sealing effect.

[0024] In this embodiment of the utility model, the second sealing mechanism includes a second sealing ring 7 and a sealing pressure plate 8. The second sealing ring 7 is selected as a high-temperature resistant sealing ring to be suitable for sealing under high-temperature conditions and to ensure the sealing performance of the device under different working environments. The bottom of the second sealing ring 7 is fitted and connected to the outer wall of the cylinder 2 to ensure a tight fit without gaps. One side of the second sealing ring 7 is connected to the friction ring 3, and the other side is fixedly connected to the sealing pressure plate 8. Bolts are passed through the sealing pressure plate 8, the second sealing ring 7, and the friction ring 3 in sequence to compress the second sealing ring 7, thereby ensuring the sealing effect. The tight connection between the second sealing ring 7 and the outer wall of the cylinder 2 and the friction ring 3, combined with the fixing effect of the sealing pressure plate 8, can effectively prevent material from leaking from the right side of the friction ring 3.

[0025] In this embodiment of the utility model, the sliding support assembly includes a support base 12 and a support roller 13. The support roller 13 is fixedly disposed at the bottom of the support base 12 to ensure that the support roller 13 can rotate freely. The top of the support base 12 is fixedly connected to the mounting base 5, so that the sliding support assembly can provide stable support for the first sealing mechanism. The support roller 13 can roll along with the movement of the first sealing mechanism during the operation of the device, reducing friction and improving the operational stability of the device. Under high dust conditions, a protective cover or other structure can be added to the sliding support assembly to prevent dust from entering the connection between the support roller 13 and the support base 12, ensuring the normal rotation of the support roller 13 and the stability of the sliding support assembly.

[0026] In this embodiment of the invention, an air-sealing mechanism is also provided at the end of the cylinder 2. The air-sealing mechanism includes an air-pressure pipe that penetrates the cylinder 2. The outlet of the air-pressure pipe is connected to the packing seal 4 to ensure a tight connection and prevent air leakage. The air-sealing mechanism introduces compressed air into the packing seal 4 to form an air curtain seal, which further enhances the sealing effect and prevents material leakage and the entry of external impurities. It can also check the sealing performance of the packing seal. If the sealing effect is found to be reduced, it can be replaced in time. At the same time, it can also check whether the compressed air pressure of the air-sealing mechanism is stable to ensure the effectiveness of the air curtain seal.

[0027] Working principle: When the rotary drum starts working, the drum 2 drives the friction ring 3 to rotate together. The first sealing ring 6 dynamically fits with the rotating friction ring 3. Under the action of the compression spring 10, it can automatically compensate for the gap caused by wear, always maintain good sealing contact, and prevent material from leaking from the left side of the friction ring 3. The second sealing ring 7 is tightly connected to the friction ring 3 and seals from the right side of the friction ring 3. Together with the first sealing mechanism, it forms an effective sealing barrier to prevent material leakage. The polytetrafluoroethylene (PTFE) sealing packing fills the gap between the friction ring 3 and the outer wall of the drum 2, playing a preliminary sealing role. At the same time, the air sealing mechanism introduces compressed air into the PTFE sealing packing to form an air curtain seal, further enhancing the sealing effect and preventing material leakage and the entry of external impurities. During the operation of the device, the roller 13 of the sliding support assembly rolls with the slight movement of the first sealing mechanism, reducing the friction between the first sealing mechanism and the drum 2, ensuring the stable operation of the first sealing mechanism, and improving the overall stability and reliability of the device.

[0028] This utility model provides a rotary cylinder feeding sealing device that forms multiple sealing lines through packing seal, a first sealing mechanism, and a second sealing mechanism. This significantly improves the sealing performance of the rotary cylinder feed inlet, effectively reduces material leakage and the entry of external impurities, and ensures a clean production environment and continuous production. The axial compensation mechanism automatically compensates for wear on the sealing components, ensuring the sealing structure maintains a good sealing effect, extending the service life of the sealing device, and reducing equipment maintenance costs. The sliding support assembly design reduces friction between the sealing mechanism and the cylinder 2, improving the device's operational stability and reliability. The gas-tight mechanism further enhances the sealing effect, making it particularly suitable for applications with high sealing requirements. Furthermore, the use of high-performance sealing materials such as polytetrafluoroethylene (PTFE) improves the wear resistance, corrosion resistance, and high-temperature resistance of the sealing components, making it adaptable to various industrial production environments.

[0029] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the drawings and claims disclosed herein. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A rotary drum feeding sealing device, characterized in that, include: A cylinder (2) is provided with a flange (1) fixed at the end of the cylinder (2). A friction ring (3) is installed at the feed inlet of the cylinder (2). The friction ring (3) is sleeved on the outer wall of the cylinder (2) and rotates with the cylinder (2). A gap is provided between the bottom of the friction ring (3) and the outer wall of the cylinder (2), and a packing seal (4) is provided in the gap. The friction ring (3) is provided with a first sealing mechanism on its left side. One end of the first sealing mechanism away from the friction ring (3) is connected to the flange (1) through multiple axial supplementary mechanisms, and the other end is dynamically fitted and connected to the friction ring (3). The friction ring (3) is provided with a second sealing mechanism on the right side. The end of the second sealing mechanism near the friction ring (3) is connected to the friction ring (3), and its bottom is in contact with the outer wall of the cylinder (2). A sliding support assembly is located at the bottom of the device, and the top of the sliding support assembly is connected to the first sealing mechanism.

2. The rotary drum feeding sealing device according to claim 1, characterized in that, The first sealing mechanism includes a mounting base (5) and a first sealing ring (6). The mounting base (5) and the first sealing ring (6) are both sleeved on the outer wall of the cylinder (2). The first sealing ring (6) is dynamically fitted and connected to the friction ring (3). The mounting base (5) is fixedly connected to the first sealing ring (6). The side of the mounting base (5) away from the first sealing ring (6) is fixedly connected to the flange (1) through multiple axial supplementary mechanisms.

3. The rotary drum feeding sealing device according to claim 2, characterized in that, The second sealing mechanism includes a second sealing ring (7) and a sealing pressure plate (8). The bottom of the second sealing ring (7) is in close contact with the outer wall of the cylinder (2). One side of the second sealing ring (7) is connected to the friction ring (3), and the other side is connected to the sealing pressure plate (8).

4. The rotary drum feeding sealing device according to claim 2, characterized in that, Multiple axial supplementation mechanisms are evenly distributed along the circumferential direction on the mounting base (5). Each axial supplementation mechanism includes a screw (9) and a compression spring (10). One end of the screw (9) is fixedly connected to the mounting base (5), and the other end is fixedly connected to the flange (1). The compression spring (10) is sleeved on the screw (9) and the compression spring (10) is located between the mounting base (5) and the flange (1). One end of the compression spring (10) is connected to the flange (1) and the other end is connected to the nut (11) sleeved on the screw (9).

5. A rotary drum feeding sealing device according to claim 2, characterized in that, The sliding support assembly includes a support base (12) and a roller (13), wherein the roller (13) is fixedly disposed at the bottom of the support base (12); The top of the support base (12) is fixedly connected to the mounting base (5).

6. The rotary drum feeding sealing device according to claim 3, characterized in that, The first sealing ring (6) is a polytetrafluoroethylene sealing ring, the packing seal (4) is a polytetrafluoroethylene sealing packing, and the second sealing ring (7) is a high-temperature resistant sealing ring.

7. The rotary drum feeding sealing device according to claim 1, characterized in that, The end of the cylinder (2) is also provided with an air sealing mechanism, which includes an air pressure pipe that passes through the cylinder (2) and the outlet of the air pressure pipe is connected to the packing seal (4).

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