Airtight fan leakage-proof device

Abstract

The utility model discloses an airtight fan anti -leakage device relates to airtight fan sealing technical field, to solve the problem of the risk of gas leakage caused by the abrasion of the long -term use of the traditional seal in prior art. First air pressure sensor is connected in the upper end of the middle part of one side of fan main body, first main shaft sealing mechanism is connected between one side of main shaft and one side end surface of fan main body, second main shaft sealing mechanism is connected to one end of main shaft away from fan main body, and the booster gas cover is set up between first main shaft sealing mechanism and second main shaft sealing mechanism and on the main shaft, second air pressure sensor is connected to the upper end of booster gas cover, and air pump is connected to the lower end of booster gas cover, can dynamic maintenance booster gas cover internal air pressure slightly higher than fan main body internal air pressure through setting booster gas cover and air pressure balance control mechanism, effectively prevent gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of airtight fan sealing technology, specifically an airtight fan anti-leakage device. Background Technology

[0002] The airtight fan shaft seal is a critical component used to prevent gas leakage. It primarily serves as a dynamic seal between the fan shaft and the housing, ensuring stable operation of the equipment under high or negative pressure conditions. Its core function is to prevent the escape of media (such as air, flue gas, or corrosive gases) along the shaft end, while simultaneously reducing the entry of external impurities into the equipment. Common sealing methods include mechanical seals, labyrinth seals, carbon ring seals, and packing seals, selected based on the operating pressure, temperature, and media characteristics.

[0003] For example, authorization announcement number CN220581323U provides a fan main shaft sealing device, including a sealing seat, a packing sealing sleeve, and a sealing cover plate sequentially sleeved on the fan main shaft. The packing sealing sleeve has multiple packing rings arranged axially between it and the main shaft, with an air-filled sealing gap between two packing rings. A lubricating gasket ring is placed within the air-filled sealing gap. The sealing seat and sealing cover plate are respectively fastened to the packing sealing sleeve and blocked at both ends of the packing rings. The packing sealing sleeve has an oil filling hole and an air filling hole communicating with the air-filled sealing gap. An oil filling cup is provided on the oil filling hole, and a removable screw plug is provided on the air filling hole. Therefore, this fan main shaft sealing device has good sealing performance, reducing leakage of medium gas from the fan to the atmosphere and avoiding safety hazards; it is not easily worn, has a long service life, and low equipment cost; the overall structure is simple and easy to manufacture; maintenance is convenient, reducing downtime and improving the stability and continuity of fan operation.

[0004] The sealing device in the above technology uses a sealing seat, a packing sleeve and a sealing cover to perform multi-stage sealing on the main shaft. However, traditional seals (such as packing seals and mechanical seals) wear out after long-term use, which leads to the risk of gas leakage. Therefore, the market urgently needs to develop an airtight fan leak prevention device to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide an airtight fan anti-leakage device to solve the problem mentioned in the background art that the sealing device uses a sealing seat, a packing sealing sleeve and a sealing cover plate to perform multi-stage sealing on the main shaft, but traditional seals (such as packing seals and mechanical seals) wear out after long-term use, which leads to the risk of gas leakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an airtight fan anti-leakage device, comprising a fan body, a first air pressure sensor connected to the upper middle part of one side of the fan body, a main shaft connected to the middle part of one side of the fan body, a first main shaft sealing mechanism connected between one side of the main shaft and one end face of the fan body, a second main shaft sealing mechanism connected to the end of the main shaft away from the fan body, a pressurizing air cover sleeved between the first and second main shaft sealing mechanisms and on the main shaft, a second air pressure sensor connected to the upper end of the pressurizing air cover, and an air pump connected to the lower end of the pressurizing air cover.

[0007] Preferably, a connecting ring is fixedly connected to one side of the outer wall of the first main shaft sealing mechanism and the second main shaft sealing mechanism. The two sides of the booster shroud are fixedly connected to the two connecting rings by multiple bolts. A first sealing ring is provided between the two connecting rings and the two end faces of the booster shroud. One side of the first main shaft sealing mechanism is fixedly connected to the fan body.

[0008] Preferably, a first connecting seat is fixedly connected to one end face of the fan body and to the upper end of the first main shaft sealing mechanism, and the detection end of the first air pressure sensor extends through the middle of the first connecting seat into the inside of the fan body.

[0009] Preferably, a second connecting seat is fixedly connected to the middle of the upper end face of the pressurization hood, and the lower detection end of the second air pressure sensor extends through the second connecting seat into the interior of the pressurization hood.

[0010] Preferably, the ends of the first and second pressure sensors away from the detection end are fixedly connected to connecting plates. The connecting plates on the first and second pressure sensors are fixedly connected to the first and second connecting seats respectively by multiple screws. A second sealing ring is provided between the two connecting plates and the first and second connecting seats respectively.

[0011] Preferably, a vent is provided in the middle of the lower end face of the pressurizing air hood, the upper end of the air pump is fixedly connected to the outside of the vent, an air inlet pipe is fixedly connected to the lower end of the air pump, and a filter screen is fixedly connected to the lower end of the air inlet pipe.

[0012] Preferably, a control component is fixedly connected to the front end of the pressurization hood, and the first pressure sensor, the second pressure sensor, and the air pump are all electrically connected to the control component.

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

[0014] (1) In this utility model, by setting up a pressure booster hood and a pressure balance control mechanism, the internal pressure of the pressure booster hood can be dynamically maintained to be slightly higher than the internal pressure of the blower body, effectively preventing gas leakage. Even if the main shaft sealing mechanism is worn due to long-term use, it can still ensure the sealing effect and significantly improve the anti-leakage performance.

[0015] (2) In this utility model, a double sealing mechanism (first main shaft sealing mechanism and second main shaft sealing mechanism) is combined with a pressurized air hood to form multiple sealing protection, further reducing the risk of leakage and improving the stability and safety of equipment operation.

[0016] (3) In this utility model, the air pump supply is automatically adjusted by real-time monitoring of the first air pressure sensor and the second air pressure sensor, combined with the control component, to achieve intelligent pressure compensation, reduce manual intervention, reduce maintenance costs, and extend the service life of the sealing components. Attached Figure Description

[0017] Figure 1 This is a front view of an airtight fan leak prevention device according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the pressurization shroud of this utility model;

[0020] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0021] In the diagram: 1. Fan body; 101. First connecting seat; 2. Main shaft; 3. First main shaft sealing mechanism; 301. Second main shaft sealing mechanism; 302. Connecting ring; 303. Bolt; 304. First sealing ring; 4. Pressure booster hood; 401. Vent; 402. Air pump; 403. Air inlet pipe; 404. Filter screen; 405. Second connecting seat; 5. First air pressure sensor; 501. Second air pressure sensor; 502. Connecting plate; 503. Screw; 504. Second sealing ring; 6. Control components. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of an airtight fan leak-proof device, comprising a fan body 1, a main shaft 2 connected to the middle of one side of the fan body 1, a first main shaft sealing mechanism 3 connected between one side of the main shaft 2 and one end face of the fan body 1, the first main shaft sealing mechanism 3 sealing the gap between the fan body 1 and the main shaft 2, a second main shaft sealing mechanism 301 connected to the end of the main shaft 2 away from the fan body 1, and a pressurized air hood sleeved between the first main shaft sealing mechanism 3 and the second main shaft sealing mechanism 301 and on the main shaft 2. 4. Connecting rings 302 are fixedly connected to the adjacent sides of the outer walls of the first main shaft sealing mechanism 3 and the second main shaft sealing mechanism 301. The two sides of the pressurizing hood 4 are fixedly connected to the two connecting rings 302 by multiple bolts 303. The two connecting rings 302 are provided with first sealing rings 304 between the two end faces of the pressurizing hood 4. One side of the first main shaft sealing mechanism 3 is fixedly connected to the fan body 1. The pressurizing hood 4 seals the main shaft 2 between the first main shaft sealing mechanism 3 and the second main shaft sealing mechanism 301.

[0024] Please see Figure 2 and Figure 3 A first pressure sensor 5 is connected to the upper middle part of one side of the blower body 1. A second pressure sensor 501 is connected to the upper part of the booster hood 4. An air pump 402 is connected to the lower end of the booster hood 4. A vent 401 is provided in the middle of the lower end face of the booster hood 4. The upper end of the air pump 402 is fixedly connected to the outside of the vent 401. A first connecting seat 101 is fixedly connected to the upper end of the first main shaft sealing mechanism 3 on one side of the blower body 1. The detection end of the first pressure sensor 5 extends through the middle of the first connecting seat 101 into the interior of the blower body 1. A second connecting seat 405 is fixedly connected to the middle of the upper end face of the booster hood 4. The lower detection end of the second pressure sensor 501 extends through the second connecting seat 405 into the interior of the booster hood 4. A control component 6 is fixedly connected to the front end of the booster hood 4. The first pressure sensor 5, the second pressure sensor 501, and the second pressure sensor 501 are connected to the upper end of the booster hood 4. Both the pressure sensor 501 and the air pump 402 are electrically connected to the control component 6. When the fan body 1 is working, the first pressure sensor 501 monitors the gas pressure inside the fan body 1 and feeds it back to the control component 6. The control component 6 controls the air pump 402 to inject air into the pressurized air shroud 4. At the same time, the second pressure sensor 501 monitors the gas pressure inside the pressurized air shroud 4 and feeds it back to the control component 6, so that the gas pressure inside the pressurized air shroud 4 tends to be balanced with the gas pressure inside the fan body 1 (so that the gas pressure inside the pressurized air shroud 4 is slightly greater than the gas pressure inside the fan body 1). Even if the first main shaft sealing mechanism 3 wears out after long-term use, the gas pressure balance between the fan body 1 and the pressurized air shroud 4 on both sides of the first main shaft sealing mechanism 3 prevents the gas inside the fan body 1 from leaking out through the first main shaft sealing mechanism 3.

[0025] Please see Figure 4A connecting plate 502 is fixedly connected to the end of the first pressure sensor 5 and the second pressure sensor 501 away from the detection end. The connecting plate 502 on the first pressure sensor 5 and the second pressure sensor 501 is fixedly connected to the first connecting seat 101 and the second connecting seat 405 by multiple screws 503. A second sealing ring 504 is provided between the two connecting plates 502 and the first connecting seat 101 and the second connecting seat 405, respectively. The second sealing ring 504 seals the first pressure sensor 5 and the second pressure sensor 501 with the first connecting seat 101 and the second connecting seat 405, respectively.

[0026] Please see Figure 2 and Figure 3 An air pump 402 is fixedly connected to an air inlet pipe 403 at its lower end, and a filter screen 404 is fixedly connected to the lower end of the air inlet pipe 403. The air pump 402 draws in air through the air inlet pipe 403, and at the same time, the air inlet pipe 403 filters the air through the filter screen 404 to prevent external dust from entering the booster air cover 4 and causing wear to the main shaft 2 when it rotates.

[0027] Working Principle: During operation, when the blower body 1 starts running, the first pressure sensor 5 monitors the gas pressure inside the blower body 1 in real time and feeds the data back to the control component 6. The control component 6 automatically adjusts the start / stop and power of the air pump 402 based on the monitoring data, drawing in filtered clean air through the air inlet pipe 403 and filter screen 404, and injecting gas into the pressurized air hood 4 through the air vent 401. The second pressure sensor 501 simultaneously monitors the internal pressure of the pressurized air hood 4 and feeds it back to the control component 6. Through closed-loop control, the internal pressure of the pressurized air hood 4 is dynamically maintained at a slightly higher level than the internal pressure of the blower body 1 (the pressure difference range can be preset). This pressure balancing mechanism ensures that even if the first main shaft sealing mechanism 3 wears down due to long-term operation, the medium gas inside the blower body 1 will be blocked inside the pressurized air hood 4 under the action of the pressure difference, preventing leakage through the sealing gap. Simultaneously, the second main shaft sealing mechanism 301, as a secondary sealing guarantee, together with the pressurized air hood 4, forms a dual leak-proof system, ensuring the reliability of the dynamic seal of the main shaft 2. The entire mechanism continuously optimizes sealing performance through real-time air pressure monitoring and automatic compensation.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. Airtight fan leak-proof device, comprising a fan body (1), characterized in that: A first pressure sensor (5) is connected to the upper part of the middle of one side of the fan body (1). A main shaft (2) is connected to the middle of one side of the fan body (1). A first main shaft sealing mechanism (3) is connected between one side of the main shaft (2) and one side end face of the fan body (1). A second main shaft sealing mechanism (301) is connected to the end of the main shaft (2) away from the fan body (1). A pressure boosting hood (4) is sleeved between the first main shaft sealing mechanism (3) and the second main shaft sealing mechanism (301) and on the main shaft (2). A second pressure sensor (501) is connected to the upper end of the pressure boosting hood (4). An air pump (402) is connected to the lower end of the pressure boosting hood (4).

2. The air-tight blower leak-proof device according to claim 1, wherein: The first main shaft sealing mechanism (3) and the second main shaft sealing mechanism (301) are each fixedly connected to a connecting ring (302) on one side of their outer walls. The two sides of the booster hood (4) are fixedly connected to the two connecting rings (302) by multiple bolts (303). The two connecting rings (302) are provided with a first sealing ring (304) between the two end faces of the booster hood (4) and the two sides of the first main shaft sealing mechanism (3). One side of the first main shaft sealing mechanism (3) is fixedly connected to the fan body (1).

3. The air-tight blower leak-proof device according to claim 1, wherein: A first connecting seat (101) is fixedly connected to one side end face of the fan body (1) and to the upper end of the first main shaft sealing mechanism (3). The detection end of the first air pressure sensor (5) extends through the middle of the first connecting seat (101) into the inside of the fan body (1).

4. The air-tight blower leak-proof device according to claim 2, wherein: The upper end of the pressurized air hood (4) is fixedly connected to a second connecting seat (405), and the lower end of the second air pressure sensor (501) extends through the second connecting seat (405) into the interior of the pressurized air hood (4).

5. The air-tight blower leak-proof device according to claim 4, wherein: A connecting plate (502) is fixedly connected to the end of the first pressure sensor (5) and the second pressure sensor (501) away from the detection end. The connecting plate (502) on the first pressure sensor (5) and the second pressure sensor (501) is fixedly connected to the first connecting seat (101) and the second connecting seat (405) respectively by multiple screws (503). A second sealing ring (504) is provided between the two connecting plates (502) and the first connecting seat (101) and the second connecting seat (405) respectively.

6. The air-tight blower leak-proof device of claim 1, wherein: The pressure booster hood (4) has a vent (401) in the middle of its lower end face. The upper end of the air pump (402) is fixedly connected to the outside of the vent (401). The lower end of the air pump (402) is fixedly connected to an air inlet pipe (403). The lower end of the air inlet pipe (403) is fixedly connected to a filter screen (404).

7. The air-tight blower leak-proof device of claim 1, wherein: The front end of the pressurized air hood (4) is fixedly connected to a control component (6), and the first air pressure sensor (5), the second air pressure sensor (501) and the air pump (402) are all electrically connected to the control component (6).

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