A coal mill base sealing device assembly

Abstract

The utility model relates to coal mill sealing assembly technical field, specifically is a kind of coal mill base sealing device assembly, including machine stand upper sealing guard plate A, machine stand upper sealing guard plate B, machine stand lower sealing shell and carbon packing, the bottom end of machine stand upper sealing guard plate A is equipped with machine stand upper sealing guard plate B, the bottom of machine stand upper sealing guard plate B is equipped with connecting flange by bolt, the bottom of connecting flange is engaged with machine stand lower sealing shell, and the butt joint surface of connecting flange and machine stand lower sealing shell is bonded with sealing ring;The bottom of machine stand lower sealing shell is provided with sealing screw plug cover, the middle part of sealing screw plug cover is butt joint and is provided with No. The inside of sealing screw plug cover is provided with wear-resistant ring through annular groove, and the lower end of wear-resistant ring is embedded with carbon packing;Coal mill base sealing device assembly can adopt three different sealing materials, can effectively prevent wind powder leakage, and sealing effect is good.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mill sealing components, specifically to a coal mill base sealing device component. Background Technology

[0002] Preventing air leakage from the main shaft of the coal mill is crucial for ensuring efficient equipment operation, reducing energy consumption, and lowering maintenance costs. Air leakage from the main shaft can lead to seal failure, coal dust leakage, bearing lubrication contamination, and even safety hazards. Composite sealing technology, such as a labyrinth seal combined with a carbon ring seal, is often used. This involves setting multiple labyrinth grooves at the contact surface between the main shaft and the mill base to reduce pressure difference through airflow throttling; a carbon ring seal is added to the outside, utilizing the self-lubricating properties of the carbon ring to reduce friction and simultaneously forming an air barrier to isolate coal dust. However, this method is less effective and prone to damage.

[0003] The sealing device assembly of the coal mill base cannot use three different sealing materials, as this cannot effectively prevent air and coal leakage and results in poor sealing performance. Summary of the Invention

[0004] To address the problems in the existing technology, this utility model provides a coal mill base sealing device assembly. The coal mill base sealing device assembly can use three different sealing materials, which can effectively prevent air and coal leakage and has a good sealing effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is a coal mill base sealing device assembly, including an upper sealing guard plate A, an upper sealing guard plate B, a lower sealing shell and a carbon packing. The lower sealing guard plate B is sleeved on the bottom end of the upper sealing guard plate A. A connecting flange is bolted to the bottom of the upper sealing guard plate B. The lower sealing shell is engaged with the bottom of the connecting flange. A sealing ring is bonded to the mating surface of the connecting flange and the lower sealing shell. A sealing screw sleeve is provided at the bottom of the lower sealing shell of the base. A second connecting plate is connected to the middle part of the sealing screw sleeve. A wear-resistant ring is provided on the inner side of the sealing screw sleeve through an annular groove. A carbon packing is embedded at the lower end of the wear-resistant ring.

[0006] By adopting the above technical solution, the coal mill base sealing device assembly can use three different sealing materials, which can effectively prevent air and coal leakage and achieve good sealing effect.

[0007] Specifically, the connecting flange is connected to the lower sealing shell of the machine base by bolts, and the sealing ring is specifically made of silicone rubber.

[0008] Specifically, a tie rod and a nut are provided at the connection between the sealing plate A and the sealing plate B on the machine base.

[0009] By adopting the above technical solution, the tie rod and nut facilitate the connection between the sealing plate A and the sealing plate B on the machine base, making installation and disassembly convenient.

[0010] Specifically, the outer side of the second connecting plate is bolted to the first connecting plate.

[0011] By adopting the above technical solution, the internal sealing ring can effectively reduce the wear between the No. 1 and No. 2 connecting plates and the upper end face of the lower sealing shell of the machine base.

[0012] Specifically, the sealing screw sleeve is provided with a No. 1 screw plug and a No. 2 screw plug, and a sealing rubber strip is provided on one side of the No. 2 screw plug.

[0013] Specifically, the wear-resistant ring is made of butyl rubber.

[0014] The beneficial effects of this utility model are: The present invention discloses a coal mill base sealing device assembly. The upper end of the lower sealing shell of the base has two grooves. The sealing rings placed inside can effectively reduce the wear between the first and second connecting plates and the upper end face of the lower sealing shell of the base, and play a sealing role, reducing the risk of air and powder leakage. When the upper lip sealing ring is worn, the wear-resistant ring can be used to compress and compensate the worn part. The sealing rubber strip can also be tightened after wear to compensate and prevent air and powder leakage. The second seal uses carbon packing, whose wear-resistant and high-temperature resistant properties can play a good sealing role. The third seal uses a wear-resistant ring, which has the characteristics of wear resistance, corrosion resistance and high temperature resistance, good sealing performance, and plays a guiding role.

[0015] The coal mill base sealing device assembly described in this utility model uses three different sealing materials to effectively prevent air and coal leakage, resulting in a better sealing effect. There are two air chambers above the first seal and below the second seal. When in normal use, the external sealing air is connected, and two sealing air chambers are formed inside. The internal air pressure can generate axial force on the sealing components, ensuring the end face sealing of each component and extending its service life. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; In the diagram: 1. Upper sealing plate A of the machine base; 2. Upper sealing plate B of the machine base; 3. Connecting flange; 4. Lower sealing shell of the machine base; 5. Sealing plug sleeve; 6. Plug No. 1; 7. Connecting plate No. 1; 8. Connecting plate No. 2; 9. Plug No. 2; 10. Sealing rubber strip; 11. Carbon packing; 12. Wear ring; 13. Sealing ring. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] To ensure the coal mill base sealing device assembly can utilize three different sealing materials, effectively preventing air and coal leakage and achieving a good sealing effect, such as... Figure 1 As shown, the present invention provides a coal mill base sealing device assembly, including an upper sealing plate A1, an upper sealing plate B2, a lower sealing shell 4, and a carbon packing 11. The upper sealing plate B2 is fitted onto the bottom end of the upper sealing plate A1. A connecting flange 3 is bolted to the bottom of the upper sealing plate B2. The lower sealing shell 4 is engaged with the bottom of the connecting flange 3. A sealing ring 13 is bonded to the mating surface of the connecting flange 3 and the lower sealing shell 4. The bottom of the lower sealing shell 4 of the base is provided with a sealing screw sleeve 5. The middle part of the sealing screw sleeve 5 is connected with a second connecting plate 8. The inner side of the sealing screw sleeve 5 is provided with a wear-resistant ring 12 through an annular groove. The lower end of the wear-resistant ring 12 is embedded with a carbon packing 11.

[0020] When in use, the coal mill base sealing device assembly can use three different sealing materials to effectively prevent air and coal leakage and achieve a good sealing effect.

[0021] For example, such as Figure 1 As shown, this utility model also includes a connecting flange 3 connected to a lower sealing shell 4 of the machine base by bolts, and the sealing ring 13 is specifically made of silicone rubber material.

[0022] When in use, silicone rubber material is highly elastic, tough, corrosion-resistant, has a good sealing effect, and is durable.

[0023] For example, such as Figure 1 As shown, the present invention also includes a tie rod and a nut at the connection between the sealing plate A1 and the sealing plate B2 on the base.

[0024] During use, the tie rod and nut facilitate the connection between the sealing plate A1 and the sealing plate B2 on the machine base, making installation and disassembly convenient.

[0025] For example, such as Figure 1 As shown, this utility model also includes a first connecting plate 7 connected to the outer side of the second connecting plate 8 by bolts.

[0026] During use, the internal sealing ring 13 can effectively reduce the wear between the No. 1 connecting plate 7 and the No. 2 connecting plate 8 and the upper end face of the lower sealing shell 4 of the machine base.

[0027] For example, such as Figure 1 As shown, the present invention also includes a first screw plug 6 and a second screw plug 9 fitted inside the sealing screw plug sleeve 5, and a sealing rubber strip 10 is provided on one side of the second screw plug 9.

[0028] During use, the sealing rubber strip 10 can also be tightened to compensate for wear and prevent air and powder leakage.

[0029] For example, such as Figure 1 As shown, the present invention also includes a wear-resistant ring 12 specifically made of butyl rubber material.

[0030] In use, the third seal uses a wear-resistant ring 12, which is wear-resistant, corrosion-resistant and high-temperature resistant, has good sealing performance and plays a guiding role.

[0031] When this utility model is in use, the upper end of the lower sealing shell 4 of the machine base is provided with two grooves. The sealing ring 13 placed inside can effectively reduce the wear between the first connecting plate 7 and the second connecting plate 8 and the upper end face of the lower sealing shell 4 of the machine base, and play a sealing role, reducing the risk of air leakage and powder leakage. When the upper lip sealing ring 13 is worn, the wear-resistant ring 12 can be used to compress and compensate the worn part. The sealing rubber strip 10 can also be compensated and tightened after wear to prevent air leakage and powder leakage. The second seal uses carbon packing 11, which has wear-resistant and high-temperature resistant properties and can play a good sealing role. The third seal uses a wear-resistant ring 12, which has wear-resistant, corrosion-resistant and high-temperature resistant properties, good sealing performance and plays a guiding role. These three different sealing materials can effectively prevent air powder leakage and have a better sealing effect. There are two air chambers above the first seal and below the second seal. When in normal use, the external sealing air is connected, and two sealing air chambers are formed inside. The internal air pressure can generate axial force on the sealing element, ensuring the end face sealing of each component and extending its service life. Each chamber has a No. 1 screw plug 6 and a No. 2 screw plug 9 on the outer side. When the sealing core reaches the end of its service life and wears out, the lower sealing screw plug sleeve 5 can be removed, and the corresponding screw plug can be tightened to block the inlet to the lower sealing air chamber, reducing the leakage of sealing air from this point. After replacing the new sealing core, the dual air chamber can be restored to use. This allows for free switching and opening / closing of the dual air chambers.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A coal mill base sealing device assembly, characterized in that, It includes an upper sealing plate A (1), an upper sealing plate B (2), a lower sealing shell (4), and a carbon packing (11). The upper sealing plate A (1) is fitted with the upper sealing plate B (2) at its bottom end. The bottom of the upper sealing plate B (2) is bolted with a connecting flange (3). The bottom of the connecting flange (3) is engaged with the lower sealing shell (4). A sealing ring (13) is bonded to the mating surface of the connecting flange (3) and the lower sealing shell (4). The bottom of the lower sealing shell (4) of the base is provided with a sealing screw sleeve (5), and the middle part of the sealing screw sleeve (5) is connected with a second connecting plate (8). The inner side of the sealing screw sleeve (5) is provided with a wear-resistant ring (12) through an annular groove, and the lower end of the wear-resistant ring (12) is embedded with a carbon packing (11).

2. The coal mill base sealing device assembly according to claim 1, characterized in that, The connecting flange (3) is connected to the lower sealing shell (4) of the machine base by bolts, and the sealing ring (13) is specifically made of silicone rubber material.

3. The coal mill base sealing device assembly according to claim 1, characterized in that, A tie rod and nut are provided at the connection between the upper sealing plate A (1) and the upper sealing plate B (2) of the machine base.

4. The coal mill base sealing device assembly according to claim 1, characterized in that, The outer side of the second connecting plate (8) is connected to the first connecting plate (7) by bolts.

5. A coal mill base sealing device assembly according to claim 1, characterized in that, The sealing screw sleeve (5) is fitted with a first screw plug (6) and a second screw plug (9), and a sealing rubber strip (10) is provided on one side of the second screw plug (9).

6. The coal mill base sealing device assembly according to claim 1, characterized in that, The wear-resistant ring (12) is specifically made of butyl rubber material.

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