A free-breathing device for a blower bearing housing

Abstract

This utility model provides a free-breathing device for a bearing housing of an induced draft fan, relating to the field of induced draft fans. The device includes an induced draft fan and a bearing housing disposed inside the fan. A first breathing valve is provided at one end of the bearing housing. The exhaust end of the first breathing valve is connected to and passes through a connecting pipe. The connecting pipe passes through the induced draft fan and extends to the outside of the fan. The end of the connecting pipe away from the first breathing valve is connected to and passes through a storage unit for storing the fumes generated in the bearing housing. This free-breathing device for the bearing housing, by adding a first breathing valve and a connecting pipe to the bearing housing, allows fumes generated inside the bearing housing to be guided to the outside of the induced draft fan through the connecting pipe. The fumes are then post-treated by the external storage unit, thereby preventing fumes from accumulating inside the induced draft fan and reducing the risk of combustion of fumes inside the fan.

Description

Technical Field

[0001] This utility model relates to the field of induced draft fan technology, specifically to a free breathing device for an induced draft fan bearing housing. Background Technology

[0002] During operation, the induced draft fan of a power plant has a slight difference in opening between the two stages of blades. The opening of the second stage blade is slightly larger than that of the first stage blade, which causes negative pressure to be generated in the bearing box chamber between the two stages of blades. Oil fumes in the bearing box will accumulate between the two stages of blades, resulting in a large amount of condensed lubricating oil, causing waste and fire hazards. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a free breathing device for the bearing housing of an induced draft fan, which solves the problem of oil fumes accumulating inside the induced draft fan as mentioned in the background technology.

[0004] Technical solution

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a free breathing device for a blower bearing housing, comprising a blower and a bearing housing disposed inside the blower, wherein a breathing valve is provided at one end of the bearing housing, the exhaust end of the breathing valve is connected to and passes through a connecting pipe, the connecting pipe passes through the blower and extends to the outside of the blower, and the end of the connecting pipe away from the breathing valve is connected to and passes through a storage unit for storing the flue gas generated by the bearing housing.

[0006] Furthermore, the storage unit is a lubricating oil station. The lubricating oil station is connected to the bearing housing through a lubricating oil inlet pipe and a lubricating oil return pipe and circulates lubricating oil. The lubricating oil station includes an oil storage chamber, and a connecting pipe is connected to and runs through the oil storage chamber. A second breather valve is installed at the top of the oil storage chamber.

[0007] Furthermore, the storage unit is a temporary storage cavity, with an air outlet at one end and a filter layer inside. A connecting pipe is connected to and runs through the temporary storage cavity from the end away from the air outlet.

[0008] Furthermore, the interior of the temporary storage cavity is provided with cross-distributed baffles, which form flow channels, and the filter layer is disposed between two adjacent baffles.

[0009] Furthermore, the storage unit is a condensation chamber, and a condenser for cooling oil fumes is installed inside the condensation chamber. An inner sleeve is installed at the end of the condensation chamber away from the inlet. A sealing plug is slidably connected inside the inner sleeve. An outer sleeve with a sealed top is fitted onto the outer surface of the inner sleeve. The outer sleeve and the inner sleeve are fixedly connected by a return spring. A through hole is opened on the outside of the outer sleeve.

[0010] Furthermore, the condenser is a copper tube formed by folding and bending, with bent and coiled portions at both the end of the copper tube located inside the condensation chamber and the end located outside the condensation chamber.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. The free breathing device for the bearing housing of the induced draft fan adds a breathing valve and a connecting pipe to the bearing housing. After oil fumes are generated inside the bearing housing, they are guided to the outside of the induced draft fan through the connecting pipe. The oil fumes are then post-treated by the external storage unit, thereby preventing the oil fumes from accumulating inside the induced draft fan and reducing the risk of oil fumes burning inside the induced draft fan.

[0013] 2. The free breathing device of the induced draft fan bearing housing has a storage unit as a condensation chamber. The condensation chamber is equipped with a condenser for cooling oil fumes. An inner sleeve is set at the end of the condensation chamber away from the inlet. A sealing plug is slidably connected inside the inner sleeve. An outer sleeve with a sealed top is fitted onto the outer surface of the inner sleeve. The outer sleeve and the inner sleeve are fixedly connected by a return spring. A through hole is opened on the outside of the outer sleeve. When the flue gas enters the condensation chamber, it can squeeze the sealing plug upward and temporarily store it in the condensation chamber. The condenser condenses the flue gas, reducing its volume. The sealing plug returns to its original position under the action of the spring, thereby condensing and collecting the flue gas in the condensation chamber. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a half-sectional schematic diagram of the temporary storage cavity of this utility model;

[0016] Figure 3 This is a half-sectional schematic diagram of the condensation chamber of this utility model;

[0017] Figure 4 This is a schematic diagram of the breather valve used in this application.

[0018] The components are as follows: 1. Exhaust fan; 2. Bearing housing; 3. Breathing valve one; 4. Connecting pipe; 5. Storage unit; 501. Lubricating oil station; 6. Lubricating oil inlet pipe; 7. Lubricating oil return pipe; 502. Oil storage chamber; 503. Breathing valve two; 504. Temporary storage chamber; 505. Air outlet; 506. Filter layer; 507. Baffle; 508. Condensation chamber; 509. Condenser; 510. Inner sleeve; 511. Sealing plug; 512. Outer sleeve; 513. Return spring; 514. Through hole. Detailed Implementation

[0019] 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.

[0020] See Figures 1-4 A free breathing device for a bearing housing of an induced draft fan includes an induced draft fan 1 and a bearing housing 2 disposed inside the induced draft fan 1. A breathing valve 3 is provided at one end of the bearing housing 2. The breathing valve 3 has been slightly modified by providing a threaded ring at its exhaust end. A connecting pipe 4 is connected to and passes through the exhaust end of the breathing valve 3. The connecting pipe 4 is connected to the threaded ring by a threaded sleeve and is wrapped around the outer surface of the exhaust end of the breathing valve. The connecting pipe 4 passes through the induced draft fan 1 and extends to the outside of the induced draft fan 1. The end of the connecting pipe 4 away from the breathing valve 3 is connected to and passes through a storage unit 5 for storing the flue gas generated in the bearing housing 2. By setting the breathing valve 3 and the connecting pipe 4 and restricting the extension of the connecting pipe 4 to the outside of the induced draft fan 1, the flue gas generated inside the bearing housing 2 can be drawn out of the induced draft fan 1 to avoid the flammability risk caused by the concentration of flue gas.

[0021] Storage unit 5 is a lubricating oil station 501. The lubricating oil station 501 is connected to the bearing housing 2 through the lubricating oil inlet pipe 6 and the lubricating oil return pipe 7 and circulates the lubricating oil. The lubricating oil station 501 includes an oil storage chamber 502. The connecting pipe 4 is connected to and passes through the oil storage chamber 502. A second breather valve 503 is provided at the top of the oil storage chamber 502 to introduce the flue gas into the interior of the lubricating oil station 501. After being cooled by itself, the lubricating oil flue gas condenses into lubricating oil and can be put back into circulation.

[0022] In another embodiment, the storage unit 5 is a temporary storage cavity 504. One end of the temporary storage cavity 504 is provided with an air outlet 505. The interior of the temporary storage cavity 504 is provided with a filter layer 506. The filter layer 506 is made of high-temperature resistant metal woven mesh and filled with fiber parts that absorb lubricating oil. The connecting pipe 4 is connected to and passes through the temporary storage cavity 504 from the end away from the air outlet 505. By setting it up, the lubricating oil in the flue gas can be adsorbed.

[0023] Specifically, the temporary storage chamber 504 is provided with cross-distributed baffles 507, which form a flow channel. The filter layer 506 is disposed between two adjacent baffles 507. This arrangement can increase the length of the flue gas filtration path.

[0024] In another embodiment, the storage unit 5 is a condensation chamber 508. The condensation chamber 508 is equipped with a condenser 509 for cooling oil fumes. An inner sleeve 510 is provided at the end of the condensation chamber 508 away from the inlet. A sealing plug 511 is slidably connected inside the inner sleeve 510. An outer sleeve 512 with an upper end sealed is fitted onto the outer surface of the inner sleeve 510. The outer sleeve 512 and the inner sleeve 510 are fixedly connected by a return spring 513. A through hole 514 is provided on the outside of the outer sleeve 512. When the flue gas enters the condensation chamber 508, it can push the sealing plug 511 upward and temporarily store it in the condensation chamber 508. The flue gas is condensed by the condenser 509, reducing its volume. The sealing plug 511 is reset under the action of the spring, thereby condensing and collecting the flue gas in the condensation chamber 508.

[0025] The condenser 509 is a copper tube formed by folding and bending. Both the end of the copper tube located inside the condensing chamber 508 and the end located outside the condensing chamber 508 are provided with bent and coiled portions. This arrangement allows for efficient heat exchange.

[0026] In use, a breather valve 3 and a connecting pipe 4 are added to the bearing housing 2. After the oil fumes are generated in the bearing housing 2, they are guided to the outside of the induced draft fan 1 through the connecting pipe 4. The oil fumes are then post-treated by the external storage unit 5, thereby preventing the oil fumes from accumulating inside the induced draft fan 1 and reducing the risk of the oil fumes burning inside the induced draft fan 1.

[0027] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A free-breathing device for a blower bearing housing, comprising a blower (1) and a bearing housing (2) disposed inside the blower (1), characterized in that: One end of the bearing housing (2) is provided with a breathing valve (3), the exhaust end of the breathing valve (3) is connected to and penetrates a connecting pipe (4), the connecting pipe (4) passes through the induced draft fan (1) and extends to the outside of the induced draft fan (1), and the end of the connecting pipe (4) away from the breathing valve (3) is connected to and penetrates a storage unit (5) for storing the flue gas generated by the bearing housing (2).

2. The free breathing device for a blower bearing housing according to claim 1, characterized in that: The storage unit (5) is a lubricating oil station (501). The lubricating oil station (501) is connected to the bearing housing (2) and circulates lubricating oil through the lubricating oil inlet pipe (6) and the lubricating oil return pipe (7). The lubricating oil station (501) includes an oil storage chamber (502). The connecting pipe (4) is connected to and passes through the oil storage chamber (502). A second breather valve (503) is provided at the top of the oil storage chamber (502).

3. The free breathing device for a blower bearing housing according to claim 1, characterized in that: The storage unit (5) is a temporary storage cavity (504). One end of the temporary storage cavity (504) is provided with an air outlet (505). The interior of the temporary storage cavity (504) is provided with a filter layer (506). The connecting pipe (4) is connected to and passes through the temporary storage cavity (504) from the end of the temporary storage cavity (504) away from the air outlet (505).

4. The free breathing device for a blower bearing housing according to claim 3, characterized in that: The temporary storage cavity (504) is provided with cross-distributed baffles (507), which form flow channels, and the filter layer (506) is disposed between two adjacent baffles (507).

5. The free breathing device for a blower bearing housing according to claim 1, characterized in that: The storage unit (5) is a condensing chamber (508). The condensing chamber (508) is equipped with a condenser (509) for cooling oil fumes. An inner sleeve (510) is provided at the end of the condensing chamber (508) away from the inlet. A sealing plug (511) is slidably connected inside the inner sleeve (510). An outer sleeve (512) with a sealed upper end is fitted onto the outer surface of the inner sleeve (510). The outer sleeve (512) and the inner sleeve (510) are fixedly connected by a return spring (513). A through hole (514) is provided on the outside of the outer sleeve (512).

6. The free breathing device for a blower bearing housing according to claim 5, characterized in that: The condenser (509) is a copper tube formed by folding and bending. The copper tube (515) has a bent and coiled part at one end inside the condensation chamber (508) and at the other end outside the condensation chamber (508).

Images