Dynamic oil film sealing device for rotary kiln

Abstract

This utility model relates to the field of rotary kilns, specifically to a dynamic oil film sealing device for rotary kilns. It includes a first flange and a second flange coaxially arranged, which can be connected to the outer shell of the rotary kiln. A sealing sleeve is installed on the inner ring of both the first and second flanges, with a clearance fit between the sealing sleeve and the kiln body. A mesh-like distribution of oil grooves is formed on the inner surface of the sealing sleeve, creating an oil passage between the first flange and the oil grooves on the sealing sleeve. This solution, by machining the mesh-like distribution of oil grooves on the inner surface of the sealing sleeve and injecting sealing oil, allows the sealing oil to form a uniform and continuous dynamic oil film under the combined action of centrifugal force and friction when the kiln body rotates, achieving a seal. Compared to traditional mechanical sealing structures (such as sealing rings), this device is more adaptable to harsh environments and ensures long-term stable operation of the rotary kiln.

Description

Technical Field

[0001] This utility model relates to the field of rotary kilns, specifically to a dynamic oil film sealing device for rotary kilns. Background Technology

[0002] In the field of waste incineration, rotary kilns have become the mainstream equipment due to their high processing capacity. However, the leakage of toxic and harmful gases generated during incineration has always been a problem that the industry urgently needs to solve. Traditional mechanical sealing structures, such as sealing rings, are corroded by a large number of corrosive components in the waste under the harsh environment of waste incineration, which greatly reduces their sealing effect, causing not only environmental pollution but also safety hazards. Utility Model Content

[0003] In view of the above, the purpose of this utility model is to address the problems of the prior art by providing a dynamic oil film sealing device for rotary kilns.

[0004] A rotary kiln dynamic oil film sealing device in this solution includes a first flange and a second flange arranged coaxially, which can be connected to the outer shell of the rotary kiln. A sealing sleeve is installed on the inner ring of the first flange and the second flange. The sealing sleeve is clearance-fitted with the kiln body of the rotary kiln. A mesh-distributed oil groove is formed on the inner surface of the sealing sleeve. An oil passage is formed between the oil groove of the first flange and the sealing sleeve.

[0005] Furthermore, the inner sides of the first and second flanges have at least one annular sealing gasket, which is pressed against the surface of the housing by a tightening bolt.

[0006] Furthermore, the first flange and the second flange are provided with several elastic clamping devices. The elastic clamping devices include bolts on the outer side, and springs and top blocks on the inner side. The bolts abut against the springs, the springs abut against the top blocks, and the top blocks press against the outer shell of the rotary kiln.

[0007] Furthermore, the sealing sleeve adopts a split structure, with a copper semi-circular block at the top.

[0008] Beneficial effects: This solution involves machining a mesh-like distribution of oil grooves on the inner surface of the sealing sleeve and injecting sealing oil. When the rotary kiln rotates, the sealing oil forms a uniform and continuous dynamic oil film under the combined action of centrifugal force and friction, thus achieving a seal. Compared with traditional mechanical sealing structures (such as sealing rings), this solution is more adaptable to harsh environments and ensures the long-term stable operation of the rotary kiln. Attached Figure Description

[0009] Figure 1 This is a front view illustration of this application;

[0010] Figure 2 For along Figure 1 Schematic diagram of the cross section of line AA;

[0011] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0012] Figure 4 This is a schematic diagram of the three-dimensional structure of this application;

[0013] Figure 5 This is a partial sectional view of the three-dimensional state of this application;

[0014] Figure 6 for Figure 5 Enlarged view at point B in the middle;

[0015] Figure 7 This is an exploded view of the structure of this application;

[0016] Figure 8 This is a schematic diagram showing the installation status of this application;

[0017] Figure reference numerals: 1. First flange; 2. Second flange; 3. Outer shell; 4. Sealing sleeve; 401. Copper semi-circular block; 5. Kiln body; 6. Oil tank; 7. Oil passage; 8. Sealing gasket; 9. Tightening bolt; 10. Bolt; 11. Spring; 12. Top block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1 to 8 The rotary kiln dynamic oil film sealing device shown includes a first flange 1 and a second flange 2 coaxially arranged, which can be installed on the outer shell 3 of the rotary kiln. A sealing sleeve 4 is installed on the inner ring of the first flange 1 and the second flange 2, and the sealing sleeve 4 is clearance-fitted with the kiln body 5 of the rotary kiln. A mesh-like distribution of oil grooves 6 is machined on the inner surface of the sealing sleeve 4, and an oil passage 7 is machined between the first flange 1 and the oil grooves 6 of the sealing sleeve 4. When sealing oil is injected into the oil passage 7, the oil can travel directly to the oil grooves 6 along the passage. During the rotation of the kiln body 5, the sealing oil in the oil grooves 6, under the combined action of centrifugal force and friction, quickly forms a uniform and continuous dynamic oil film between the sealing sleeve 4 and the kiln body 5, achieving a sealing effect.

[0020] To further enhance sealing performance, as a preferred embodiment, at least one annular sealing gasket 8 is provided on the inner side of the first flange 1 and the second flange 2. The sealing gasket 8 is tightly pressed onto the surface of the rotary kiln shell 3 by the tightening bolts 9, so that the sealing gasket 8 and the shell 3 form a seamless fit, effectively filling the tiny gaps between the flange and the shell 3, adding a reliable defense for gas sealing, and greatly improving the overall sealing effect.

[0021] For securing the device, several elastic clamping devices are installed on the first flange 1 and the second flange 2. This device consists of bolts 10 on the outer side, springs 11 on the inner side, and a top block 12. The bolts 10 abut against the springs 11, and the springs 11 abut against the top block 12. Operators can flexibly adjust the bolts 10 according to actual working conditions to precisely control the pressure of the springs 11 on the top block 12. Under the elastic pressure of the springs 11, the top block 12 is firmly pressed against the rotary kiln shell 3, which not only enhances the connection strength between the first flange 1 and the second flange 2 and the kiln body 5, but also effectively buffers vibrations during rotary kiln operation, ensuring that the sealing device maintains a stable and reliable fixing effect under complex working conditions.

[0022] It is worth mentioning that the sealing sleeve 4 adopts a split structure, with its top made of a more wear-resistant copper semi-circular block 401. This unique design stems from the fact that the rotary kiln's support roller 13 is supported below the kiln body 5, and the upward supporting reaction force results in a relatively greater contact pressure between the top of the kiln body 5 and the sealing sleeve 4, leading to more severe wear. Using copper, a material with excellent wear resistance, to make the top of the sealing sleeve 4 can significantly extend the service life of the sealing sleeve 4, reduce the frequency and cost of equipment maintenance, and ensure the long-term stable operation of the rotary kiln. Meanwhile, the aforementioned oil groove 6 is also formed on the copper semi-circular block 401. The copper semi-circular block 401 has an oil outlet hole 401a that communicates with the oil passage 7.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary kiln dynamic oil film seal apparatus, characterized by: The first flange (1) and the second flange (2) are coaxially arranged and can be connected to the outer shell (3) of the rotary kiln. The inner ring of the first flange (1) and the second flange (2) is equipped with a sealing sleeve (4). The sealing sleeve (4) is clearance-fitted with the kiln body (5) of the rotary kiln. The inner surface of the sealing sleeve (4) is formed with a mesh-distributed oil groove (6). An oil passage (7) is formed between the first flange (1) and the oil groove (6) of the sealing sleeve (4).

2. A rotary kiln dynamic oil film seal apparatus as claimed in claim 1 wherein: The inner sides of the first flange (1) and the second flange (2) have at least one annular gasket (8), which is pressed against the surface of the housing (3) by a tightening bolt (9).

3. A rotary kiln dynamic oil film seal as claimed in claim 1 wherein: The first flange (1) and the second flange (2) are provided with several elastic clamping devices. The elastic clamping devices include bolts (10) on the outer side, and springs (11) and top blocks (12) on the inner side. The bolts (10) abut against the springs (11), the springs (11) abut against the top blocks (12), and the top blocks (12) press against the outer shell (3) of the rotary kiln.

4. A rotary kiln dynamic oil membrane seal as defined in claim 1, wherein: The sealing sleeve (4) adopts a split structure, with a copper semi-circular block (401) at the top.

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