Novel air preheater supporting bearing box sealing structure

Abstract

The utility model discloses a novel air preheater supporting bearing box sealing structure, and belongs to the technical field of bearing box sealing. The sealing structure solves the problems of operation noise and rotor abrasion caused by hard friction among the sealing filler pressing plate, the sealing filler chamber and the rotor in the existing sealing structure. Comprising an annular sealing cover, a sealing chamber, sealing oil and a cylindrical sealing baffle, the annular sealing cover is fixedly connected to a connecting base, the top end of the cylindrical sealing baffle is fixedly connected to the lower surface of the annular sealing cover, the sealing chamber is fixedly connected to the outer side of the bearing box, and the sealing oil is arranged in the sealing chamber. And the lower part of the cylindrical sealing baffle plate is positioned in the sealing oil. The novel air preheater supporting bearing box sealing structure solves the problems of operation noise and rotor abrasion caused by hard friction of a sealing filler sealing structure, meanwhile, the sealing state of the bearing box can be guaranteed, and safe and stable operation of equipment is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to a novel air preheater support bearing box sealing structure, belonging to the technical field of bearing box sealing. Background Art

[0002] The heat exchange rotor rotating in the air preheater is connected to the supporting steel structure through the support bearing. The support shaft needs to be lubricated in an oil bath during operation. In order to prevent dust, water, etc. in the air from contaminating the lubricating oil, the support bearing box needs to be sealed.

[0003] Currently, sealing packing is mostly used to seal the support bearing box. Figure 5 、 Figure 6 The diagram shows the structure of a conventional sealing packing. Since the rotor 11 rotates during operation, a fixed seal cannot be used. Therefore, a sealing packing 14 is used, compacted by a sealing packing plate 12 to provide a seal. However, this sealing method has certain drawbacks. During operation, the rotor 11 will tilt slightly due to differences in temperature, thermal expansion, and resistance between the flue gas and air sides. If the rotor 11 tilts too much, and the clearance between the sealing packing plate 12, sealing packing chamber 13, and rotor 11 is insufficient to compensate for the displacement caused by the rotor 11's tilt, friction will occur between the rotor 11 and the sealing packing plate 12, resulting in abnormal noise and wear on the rotor 11. Utility Model Content

[0004] The utility model is to solve the above technical problems and further provides a novel air preheater support bearing box sealing structure.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A new air preheater support bearing box sealing structure includes an annular sealing cover, an annular sealing groove and a cylindrical sealing baffle. The annular sealing cover is fixedly connected to a connecting seat, the top end of the cylindrical sealing baffle is fixedly connected to the lower surface of the annular sealing cover, the annular sealing groove is fixedly connected to the outer side of the support bearing box, the annular sealing groove contains sealing oil, and the lower part of the cylindrical sealing baffle is in the sealing oil.

[0007] Furthermore, the annular sealing cover is fixedly connected to a cylindrical baffle on the side away from the connecting seat.

[0008] Furthermore, the annular sealing cover is connected to the connecting seat by bolts.

[0009] Furthermore, the annular sealing groove is welded to the support bearing box.

[0010] Furthermore, a plurality of sealing rings are arranged between the connection seat and the annular sealing cover.

[0011] Furthermore, a plurality of sealing cover lifting rings are connected to the annular sealing cover.

[0012] Furthermore, a spare oil injection hole is opened on the annular sealing cover.

[0013] Furthermore, the spare oil injection hole is sealed by a sealing plug.

[0014] The utility model has the following effects compared with the prior art:

[0015] By adopting the sealing structure of the annular sealing cover, the annular sealing groove and the cylindrical sealing baffle to replace the traditional sealing packing form, while ensuring the sealing of the support bearing box, the hard friction between the sealing packing pressing plate, the sealing packing chamber and the rotor in the traditional sealing packing form is solved, the noise during the use of the equipment and the wear of the rotor are eliminated, and the safe and stable operation of the equipment can be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a sectional view of the sealing structure of the support bearing box of the new air preheater cooperating with the support bearing box;

[0017] Figure 2 FIG. is a partial sectional view of the connection seat and the annular sealing cover in the sealing structure of the support bearing box of the new air preheater;

[0018] Figure 3 FIG. is a three-dimensional structure diagram of the annular sealing cover of the sealing structure of the support bearing box of the new air preheater;

[0019] Figure 4 FIG. is a three-dimensional structure diagram of the annular sealing groove of the sealing structure of the support bearing box of the new air preheater cooperating with the support bearing box;

[0020] Figure 5 FIG. is a sectional view of the sealing structure of the sealing packing form in the prior art cooperating with the support bearing box;

[0021] Figure 6 FIG. is a partial sectional view of the rotor and the sealing structure of the sealing packing form in the prior art;

[0022] In the figure: 1. Annular sealing cover; 2. Annular sealing groove; 3. Sealing oil; 4. Cylindrical sealing baffle; 5. Cylindrical baffle; 6. Sealing ring; 7. Sealing cover lifting ring; 8. Spare oil injection hole; 9. Connection seat; 10. Support bearing box; 11. Rotor; 12. Sealing packing pressing plate; 13. Sealing packing chamber; 14. Sealing packing; 15. Sealing plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely elaborate on the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Referring to the accompanying drawings to illustrate this embodiment, a novel air preheater support bearing box sealing structure includes an annular sealing cover 1, an annular sealing groove 2, and a cylindrical sealing baffle 4. The annular sealing cover 1 is fixedly connected to the coupling seat 9. The top of the cylindrical sealing baffle 4 is fixedly connected to the lower surface of the annular sealing cover 1. The annular sealing groove 2 is fixedly connected to the outside of the support bearing box 10. The annular sealing groove 2 contains sealing oil 3, and the lower part of the cylindrical sealing baffle 4 is in the sealing oil 3. Specifically, the annular sealing groove 2 is bent from an angle steel of 75X75X6, and the annular sealing cover 1 is manufactured by processing and welding a steel plate.

[0026] By adopting the sealing structure of the annular sealing cover 1, the annular sealing groove 2, and the cylindrical sealing baffle 4 to replace the traditional sealing packing form, while ensuring the sealing of the support bearing box 10, it solves the hard friction between the sealing packing pressing plate 12, the sealing packing chamber 13, and the rotor 11 in the traditional sealing packing form, eliminates the noise during the use of the equipment and the wear of the rotor 11, and can effectively ensure the safe and stable operation of the equipment.

[0027] A cylindrical baffle 5 is fixedly connected to the side of the annular sealing cover 1 away from the coupling seat 9. The cylindrical baffle 5 can prevent dust and water from entering the sealing oil 3, thereby ensuring the sealing effect of the support bearing box 10 and improving the reliability of the sealing structure.

[0028] The annular sealing cover 1 is connected to the coupling seat 9 by bolts. The bolt connection ensures the connection stability between the annular sealing cover 1 and the coupling seat 9 and guarantees the sealing performance of the sealing structure.

[0029] The annular sealing groove 2 is welded to the support bearing box 10. The welding ensures the tight connection between the annular sealing groove 2 and the support bearing box 10, and the solder can further isolate the air, further improving the sealing performance of the sealing structure.

[0030] A number of sealing rings 6 are provided between the connecting seat 9 and the annular sealing cover 1. Through the sealing rings 6, the sealing performance between the connecting seat 9 and the annular sealing cover 1 can be further ensured, and at the same time, the dust and water proof performance of the lubricating oil of the support bearing in the support bearing box 10 can also be ensured.

[0031] A plurality of sealing cover lifting rings 7 are connected to the annular sealing cover. Through the sealing cover lifting rings 7, the lifting and installation during the overhaul of the annular sealing cover 1 are facilitated.

[0032] A spare oil injection hole 8 is provided on the annular sealing cover 1. Through the spare oil injection hole 8, the lubricating oil and the sealing oil 3 of the support bearing in the support bearing box 10 can be supplemented.

[0033] The spare oil injection hole 8 is sealed by a sealing plug 15. Through the sealing plug 15, it can be ensured that the oil injection hole is in a sealed state when the lubricating oil and the sealing oil 3 of the support bearing in the support bearing box 10 are not supplemented.

[0034] The diameter of the connecting seat 9 is larger than the diameter of the rotor 11. By making the diameter of the connecting seat 9 larger than the diameter of the rotor 11, space is provided for the fixed connection of the annular sealing cover 1, and the stability of the sealing structure is ensured in the connection between the connecting seat 9 and the annular sealing cover 1.

[0035] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A novel sealing structure for the support bearing box of an air preheater, characterized in that: It includes an annular sealing cover (1), an annular sealing groove (2) and a cylindrical sealing baffle (4). The annular sealing cover (1) is fixedly connected to a coupling seat (9). The top end of the cylindrical sealing baffle (4) is fixedly connected to the lower surface of the annular sealing cover (1). The annular sealing groove (2) is fixedly connected to the outside of a support bearing box (10). Sealing oil (3) is contained in the annular sealing groove (2), and the lower part of the cylindrical sealing baffle (4) is immersed in the sealing oil (3).

2. A novel air preheater support bearing box sealing structure according to claim 1, characterized in that: A cylindrical baffle (5) is fixedly connected to the side surface of the annular sealing cover (1) away from the coupling seat (9).

3. A novel air preheater support bearing box sealing structure according to claim 1, characterized in that: The annular sealing cover (1) is connected to the coupling seat (9) by bolts.

4. A novel air preheater support bearing box sealing structure according to claim 1, characterized in that: The annular sealing groove (2) is welded to the support bearing box (10).

5. A novel air preheater support bearing box sealing structure according to claim 1, characterized in that: A number of sealing rings (6) are arranged between the coupling seat (9) and the annular sealing cover (1).

6. The sealing structure of the support bearing box of a new type of air preheater according to claim 1, characterized in that: A plurality of sealing cover lifting rings (7) are connected to the annular sealing cover (1).

7. A novel air preheater support bearing box sealing structure according to claim 1, characterized in that: A spare oil injection hole (8) is provided on the annular sealing cover (1).

8. A novel air preheater support bearing box sealing structure according to claim 7, characterized in that: The spare oil injection hole (8) is sealed by a sealing plug (15).

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