Ventilator inflation sealing element

Abstract

The utility model relates to an inflation sealing element of a ventilator, which relates to the technical field of ventilator sealing and comprises a sealing flange, a plurality of pressing plates are arranged on the edge of the sealing flange, the sealing flange is fixed at the input end of the ventilator by the pressing plates, and a labyrinth seal, an inflation seal and a packing seal are sequentially arranged between the sealing flange and a main shaft. The sealing performance of the ventilator equipment is further ensured; the labyrinth seal comprises a plurality of labyrinth grooves formed around the inner ring side of the sealing flange; the packing seal comprises a graphite packing rope filled between the inner ring side of the sealing flange and the outer side of the main shaft, and the outer side of the graphite packing rope abuts against a sealing gland. The inflation seal comprises a sealing groove formed in the inner ring side of a sealing flange in a surrounding mode, a hole is milled in the sealing flange to form an air channel, an air conveying cylinder inputs air and forms an air film between the sealing groove and the main shaft, air vortex partition is formed when an air medium flows through, and the sealing effect is enhanced under the condition that the space is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilator seals, in particular to an inflatable seal for a ventilator. Background Technique

[0002] Ventilators are mainly used to transport various gas media, such as air, flue gas, coal gas, etc. In order to prevent the leakage of gas media, seals are set. In some scenarios, the requirements for seals are very high. In the prior art, there are many limitations in ventilator seals. Under the condition of limited space, simple labyrinth seals are difficult to meet the requirements of gas sealing, resulting in gas leakage, which will affect production and pose some potential safety hazards. Content of the Utility Model

[0003] In order to improve the problem of ventilator seals in the above background technique, improve the sealing performance of the fan and save space, the utility model provides an inflatable seal for a ventilator.

[0004] The inflatable seal for a ventilator provided by the utility model adopts the following technical scheme:

[0005] An inflatable seal for a ventilator includes a sealing flange. The sealing flange is sleeved on the main shaft, and a plurality of pressing plates are arranged at the edge of the sealing flange. The pressing plates fix the sealing flange at the input end of the ventilator through fixing bolts. Between the sealing flange and the main shaft, a labyrinth seal, an inflatable seal and a packing seal are arranged in sequence along the direction away from the input end of the ventilator.

[0006] Preferably, the inflatable seal includes a sealing groove formed around the inner ring side of the sealing flange. A plurality of air channels penetrate through the sealing flange, and the sealing groove is externally connected to an air delivery cylinder through the air channels.

[0007] Preferably, the cross-sectional area of the air channels decreases in a stepped manner from the outer ring side of the sealing flange to the inner ring side of the sealing flange, and the air channels are made by milling holes in the sealing flange.

[0008] Preferably, a plug is spirally arranged at the outer end of the air channel and is blocked by the plug.

[0009] Preferably, the labyrinth seal includes a plurality of labyrinth grooves formed around the inner ring side of the sealing flange.

[0010] Preferably, the packing seal includes a graphite packing rope. The graphite packing rope is stuffed into the gap between the inner ring side of the sealing flange and the outer side of the main shaft. A sealing gland abuts against the outer side of the graphite packing rope, and the outer end of the sealing gland is fixed to one side of the sealing flange through a sealing bolt.

[0011] Preferably, the sealing flange is made of aluminum alloy material, and the sealing gland and the pressing plates are made of carbon steel material.

[0012] In summary, the utility model has the following beneficial technical effects:

[0013] 1. In the utility model, a pressing plate is used to fix the sealing flange at the input end of the ventilator. Three sealing structures, namely labyrinth seal, gas-filled seal and packing seal, are arranged between the sealing flange and the main shaft, further ensuring the sealing performance of the ventilator equipment.

[0014] 2. A sealing groove is opened on the inner ring side of the sealing flange, and air channels are made by milling holes on the sealing flange. The air supply cylinder inputs gas and forms an air film between the sealing groove and the main shaft. When the gas medium flows through, gas eddy current is formed to cut off, realizing the enhancement of the sealing effect under the condition of limited space and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an overall installation schematic diagram of an air-filled seal of a ventilator according to an embodiment of the utility model;

[0016] Figure 2 is Figure 1 the enlarged schematic diagram at A in

[0017] Figure 3 is a structural schematic diagram of the sealing flange according to an embodiment of the utility model;

[0018] Figure 4 is a side view of the sealing flange according to an embodiment of the utility model;

[0019] Figure 5 is a partial structural perspective view of the air channel according to an embodiment of the utility model.

[0020] Description of the reference numerals: 1, sealing flange; 2, main shaft; 3, pressing plate; 4, ventilator; 5, fixing bolt; 6, labyrinth seal; 7, gas-filled seal; 8, packing seal; 9, sealing groove; 10, air channel; 11, air supply cylinder; 12, plug; 13, labyrinth groove; 14, graphite packing rope; 15, sealing gland; 16, sealing bolt; 17, bearing housing; 18, upper flange half ring; 19, lower flange half ring; 20, mounting bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following Figures 1 - 5 is a further detailed description of the utility model.

[0022] An embodiment of the utility model discloses an air-filled seal of a ventilator.

[0023] Refer to Figure 1, a ventilator inflatable seal, comprising a sealing flange 1, the sealing flange 1 is sleeved on the main shaft 2 and there are a plurality of pressing plates 3 arranged at the edge of the sealing flange 1, and the pressing plates 3 fix the sealing flange 1 at the input end of the ventilator 4 through fixing bolts 5. Between the sealing flange 1 and the main shaft 2, a labyrinth seal 6, an inflatable seal 7 and a packing seal 8 are sequentially arranged along the direction away from the input end of the ventilator 4.

[0024] Refer to Figure 1 , Figure 2 , Figure 3 , the inflatable seal 7 includes a sealing groove 9 formed around the inner ring side of the sealing flange 1, there are a plurality of air channels 10 penetrating through the sealing flange 1, the sealing groove 9 is externally connected to an air supply cylinder 11 through the air channels 10, and the air supply cylinder 11 injects sealing gas into the sealing groove 9.

[0025] Refer to Figure 5 , the cross-sectional area of the air channels 10 decreases step by step from the outer ring side to the inner ring side of the sealing flange 1, and the air channels 10 are made by milling holes in the sealing flange 1.

[0026] Refer to Figure 5 , a plug 12 is spirally arranged at the outer end of the air channel 10 and is blocked by the plug 12.

[0027] Refer to Figure 3 , the labyrinth seal 6 includes a plurality of labyrinth grooves 13 formed around the inner ring side of the sealing flange 1.

[0028] Refer to Figure 2 , Figure 3 , the packing seal 8 includes a graphite packing rope 14, the graphite packing rope 14 is stuffed in the gap between the inner ring side of the sealing flange 1 and the outer side of the main shaft 2, a sealing gland 15 abuts against the outer side of the graphite packing rope 14, and the outer end of the sealing gland 15 is fixed on one side of the sealing flange 1 through a sealing bolt 16.

[0029] Refer to Figure 3 , the sealing flange 1 is made of aluminum alloy material to reduce wear with the main shaft, and the sealing gland 15 and the pressing plate 3 are made of carbon steel material.

[0030] Refer to Figure 4 , the sealing flange 1 includes an upper flange half-ring 18 and a lower flange half-ring 19, the upper flange half-ring 18 and the lower flange half-ring 19 are fixed through mounting bolts 20 at the ends, and the sealing flange 1 uses a detachable half-ring structure, which is more convenient for installation.

[0031] The implementation principle of an airtight seal for a ventilator in an embodiment of the present utility model is as follows: The present utility model mainly modifies the ordinary labyrinth seal 6. On the basis of the labyrinth seal 6, an airtight seal 7 and a packing seal 8 are added; under the condition of limited space, in order not to add additional sealing equipment, a sealing groove 9 is opened on the inner ring side of the sealing flange 1, and an air passage 10 is made by milling holes on the sealing flange 1. The air delivery cylinder 11 injects gas into the sealing groove 9 and forms an air film between the sealing groove 9 and the main shaft 2, generating throttling and pressure reduction, thereby preventing the gas on the high-pressure side from flowing to the low-pressure side. When the gas medium flows through the sealing groove 9, a gas eddy is formed here, further isolating the gas medium, enhancing the sealing effect, and saving space and cost, achieving the enhancement of the sealing effect under the condition of limited space; a graphite packing rope 14 is stuffed into the gap between the inner ring side of the sealing flange 1 and the outer side of the main shaft 2, and the graphite packing rope 14 is abutted by a sealing gland 15 fixed on the sealing flange 1 to form the overall sealing structure of the utility model.

[0032] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A ventilator inflatable seal, characterized in that: It includes a sealing flange (1), the sealing flange (1) is sleeved on the main shaft (2), and a plurality of pressing plates (3) are arranged at the edge of the sealing flange (1). The pressing plates (3) fix the sealing flange (1) at the input end of the ventilator (4) through fixing bolts (5). A labyrinth seal (6), an inflation seal (7) and a packing seal (8) are sequentially arranged between the sealing flange (1) and the main shaft (2) along the direction away from the input end of the ventilator (4).

2. The airtight seal for a ventilator according to claim 1, wherein: The inflation seal (7) includes a sealing groove (9) formed around the inner ring side of the sealing flange (1). A plurality of air channels (10) penetrate through the sealing flange (1). The sealing groove (9) is externally connected to an air supply cylinder (11) through the air channels (10).

3. The airtight seal for a ventilator according to claim 2, characterized in that: The cross-sectional area of the air channels (10) decreases step by step from the outer ring side of the sealing flange (1) to the inner ring side of the sealing flange (1). The air channels (10) are made by milling holes in the sealing flange (1).

4. The airtight seal for a ventilator according to claim 2, characterized in that: A plug (12) is spirally arranged at the outer end of the air channel (10) and the air channel (10) is blocked by the plug (12).

5. The inflatable seal of a ventilator according to claim 1, wherein: The labyrinth seal (6) includes a plurality of labyrinth grooves (13) formed around the inner ring side of the sealing flange (1).

6. The airtight seal for a ventilator according to claim 1, wherein: The packing seal (8) includes a graphite packing rope (14). The graphite packing rope (14) is stuffed in the gap between the inner ring side of the sealing flange (1) and the outer side of the main shaft (2). A sealing gland (15) abuts against the outer side of the graphite packing rope (14). The outer end of the sealing gland (15) is fixed to one side of the sealing flange (1) through a sealing bolt (16).

7. The airtight seal for a ventilator according to claim 6, characterized in that: The sealing flange (1) is made of aluminum alloy material, and the sealing gland (15) and the pressing plate (3) are made of carbon steel material.

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