Device for blocking and sealing oil mist of sliding bearing

Abstract

The utility model discloses a sliding bearing oil mist blocking and sealing device which comprises an exciter, a bearing, an inner sealing cover and an air pressure cavity, an air supplementing pipe is installed on the inner sealing cover, one end of the air supplementing pipe is communicated with an inner cavity of the bearing, an air hole is formed in the position, located in an inner cavity of the air pressure cavity, of the air supplementing pipe, and threads are arranged on the inner wall, away from the bearing, of the air supplementing pipe. A thread is installed on the thread, an air guide hole is formed in the thread, the air guide hole is communicated with the air supplementing pipe, a cotton thread woven rubber pipe is installed on the thread, the cotton thread woven rubber pipe is connected with a seamless steel pipe, the seamless steel pipe is connected with a pipe hoop clamp, the pipe hoop clamp is connected with a filtering pressure adjusting valve, and the filtering pressure adjusting valve is connected with an adjusting ball valve. According to the utility model, micro-pressure gas is filled into the air pressure cavity and the inner cavity of the bearing, and oil mist in the oil chamber of the bearing is effectively prevented from entering the motor by using pressure difference, so that the safety risk of fire caused by the oil mist is greatly reduced, and the safe operation of equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the field of bearing seals, and particularly to a device for blocking and sealing oil mist of a sliding bearing. Background Art

[0002] Generator sets play a crucial role in industrial production, energy supply and other fields, and their safe and stable operation is the key to ensuring power supply. In a generator set, a sliding bearing is an important component used to support the rotating shaft and reduce friction.

[0003] In the prior art, high-speed generator sets are generally used to improve production efficiency. During the high-speed operation of the generator set, the sliding bearing plays the functions of supporting and positioning the rotor. Due to the friction heat generated between the high-speed rotating rotor and the bearing, lubricating oil is required for cooling and establishing an oil film to reduce friction. During the cooling process with lubricating oil, oil mist is inevitably generated. Due to the pressure difference inside and outside the bearing cavity, the oil mist enters the motor interior, condenses and adheres to the stator coil, and even forms oil droplets after a large amount of aggregation. Since the oil mist is difficult to clean, this brings a great fire safety hazard to the operation of the generator set.

[0004] Therefore, it is necessary to propose a device for blocking and sealing oil mist of a sliding bearing to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a device for blocking and sealing oil mist of a sliding bearing, so as to solve the problems that during the cooling process with lubricating oil, oil mist is inevitably generated due to the friction heat generated between the high-speed rotating rotor and the bearing, and due to the pressure difference inside and outside the bearing cavity, the oil mist enters the motor interior, condenses and adheres to the stator coil, and even forms oil droplets after a large amount of aggregation. Since the oil mist is difficult to clean, this brings a great fire safety hazard to the operation of the generator set.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for blocking and sealing oil mist of a sliding bearing, including an exciter, a bearing is installed inside the exciter, an inner seal cover is fixedly installed at the end of the bearing close to the motor side, an air pressure chamber is arranged inside the inner seal cover, the air pressure chamber has ductility, both the inner seal cover and the air pressure chamber are of hollow structures, an air supply pipe is installed on the inner seal cover, the air supply pipe penetrates through the air pressure chamber, and one end of the air supply pipe is communicated with the inner cavity of the bearing. Air holes are arranged at the position of the air supply pipe inside the inner cavity of the air pressure chamber. Threads are arranged on the inner wall of the air supply pipe away from the bearing, and a threaded screw is threadedly installed on the threads. Threads are arranged at both ends of the threaded screw. There are multiple threaded screws. An air guide hole is arranged inside the threaded screw, and the air guide hole is communicated with the air supply pipe. One end of the threaded screw is threadedly installed with a cotton braided rubber tube. One end of the cotton braided rubber tube is connected with a seamless steel pipe through the threaded screw. There are multiple seamless steel pipes. One end of the seamless steel pipe is connected with a pipe clamp through the threaded screw. The pipe clamp is connected with a filter pressure regulator through the seamless steel pipe and the threaded screw. The filter pressure regulator is connected with a regulating ball valve through the seamless steel pipe and the threaded screw. The regulating ball valve is connected with a compressed air main pipe through the seamless steel pipe. The seamless steel pipe is welded on the compressed air main pipe. The compressed air main pipe is connected to a high-pressure compressed air device in the workshop.

[0008] Preferably, pressure gauges are arranged on both the filter pressure regulator and the regulating ball valve.

[0009] Preferably, threaded screws are installed at both ends of the cotton braided rubber tube, the pipe clamp, the filter pressure regulator and the regulating ball valve.

[0010] Preferably, the outer diameter of the inner seal cover is precisely matched with the relevant part dimensions of the bearing.

[0011] Preferably, four fixed blocks are fixedly installed on the outer side of the inner seal cover, the fixed blocks are evenly distributed on the inner seal cover, and a sealing gasket is fixedly installed at the bottom of the inner seal cover.

[0012] Preferably, a breather is installed on the bearing, and the breather is communicated with the inner cavity of the bearing.

[0013] The technical effects and advantages of the present utility model are as follows:

[0014] 1. By filling the air pressure chamber and the inner cavity of the bearing with clean and slightly pressurized gas, the oil mist in the bearing oil chamber is effectively blocked from entering the motor interior by using the pressure difference, greatly reducing the safety risk of fire caused by oil mist and ensuring the safe operation of the equipment;

[0015] 2. The sealing effect is greatly improved by the precise dimension matching, the fixation of the fixed blocks and the sealing of the sealing gasket between the inner seal cover and the bearing;

[0016] 3. Adjusting the settings of the regulating ball valve and the filter pressure regulating valve can coarsely and finely adjust the gas pressure. The gas pressure can be accurately monitored and controlled through the pressure gauge to ensure that the air pressure chamber and the inner cavity of the bearing can maintain an appropriate slightly positive pressure state, meeting the requirements under different working conditions and improving the adaptability and reliability of the device.

[0017] 4. Reducing the maintenance cost of manually cleaning the oil accumulation in the generator set regularly improves the economy; considering comprehensively from multiple aspects, it plays a crucial role in the safe, stable, and long-term operation of the generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a device for blocking and sealing oil mist of a sliding bearing of the present utility model.

[0019] Figure 2 It is a schematic side view structural diagram of the sliding bearing structure of the present utility model.

[0020] Figure 3 It is a schematic internal structure diagram of the gas transmission structure of the present utility model.

[0021] Figure 4 It is a schematic structural diagram of the inner cover of the present utility model.

[0022] Figure 5 It is a schematic internal structure diagram of the inner cover of the present utility model.

[0023] In the figure: 1. Exciter; 2. Bearing; 3. Inner cover; 4. Supplementary air pipe; 5. Air pressure chamber; 6. Threaded screw; 7. Thread; 8. Air guide hole; 9. Cotton thread braided rubber hose; 10. Seamless steel pipe; 11. Pipe clamp; 12. Filter pressure regulating valve; 13. Regulating ball valve; 14. Compressed air main pipe; 15. Respirator; 16. Fixed block; 17. Sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] The present utility model provides as Figures 1 - 5A device for blocking and sealing oil mist of a sliding bearing, as shown, includes an exciter 1. Inside the exciter 1, a bearing 2 is installed. At the end of the bearing 2 close to the motor side, an inner seal cover 3 is fixedly installed. Inside the inner seal cover 3, there is a pneumatic cavity 5. The pneumatic cavity 5 has ductility. Both the inner seal cover 3 and the pneumatic cavity 5 are of hollow structure. An air supply pipe 4 is installed on the inner seal cover 3. The air supply pipe 4 penetrates through the pneumatic cavity 5, and one end of the air supply pipe 4 is communicated with the inner cavity of the bearing 2. At the position of the inner cavity of the pneumatic cavity 5 on the air supply pipe 4, there are air holes. On the inner wall of the air supply pipe 4 far from the bearing 2, there is a thread 7, and a threaded screw 6 is threadedly installed on the thread 7. Both ends of the threaded screw 6 are provided with the thread 7. There are multiple threaded screws 6. Inside the threaded screw 6, there is a gas guiding hole 8. The gas guiding hole 8 is communicated with the air supply pipe 4. One end of the threaded screw 6 is threadedly installed with a cotton braided rubber tube 9. One end of the cotton braided rubber tube 9 is connected with a seamless steel pipe 10 through the threaded screw 6. There are multiple seamless steel pipes 10. One end of the seamless steel pipe 10 is connected with a pipe clamp 11 through the threaded screw 6. The pipe clamp 11 is connected with a filter pressure regulator 12 through the seamless steel pipe 10 and the threaded screw 6. The filter pressure regulator 12 is connected with a regulating ball valve 13 through the seamless steel pipe 10 and the threaded screw 6. The regulating ball valve 13 is connected with a compressed air main pipe 14 through the seamless steel pipe 10. The seamless steel pipe 10 is welded on the compressed air main pipe 14. The compressed air main pipe 14 is connected to the high-pressure compressed air device in the plant. Pressure gauges are provided on both the filter pressure regulator 12 and the regulating ball valve 13;

[0026] Please refer to Figures 1 - 5 , first, obtain high-pressure compressed air of 0.5 Mpa to 0.7 Mpa from the high-pressure compressed air device in the plant. This air enters the device through the compressed air main pipe 14. Then, it is roughly adjusted through the regulating ball valve 13 and then finely adjusted through the filter pressure regulator 12 to reduce the pressure to a suitable range of 0.02 Mpa to 0.05 Mpa. During this process, the gas pressure can be monitored and controlled through the pressure gauges provided on the regulating ball valve 13 and the filter pressure regulator 12. The purified gas after pressure regulation is transported through a series of pipeline components such as the seamless steel pipe 10, the threaded screw 6, and the cotton braided rubber tube 9. The gas first passes through the components connected by the seamless steel pipe 10, then enters the cotton braided rubber tube 9 through the gas guiding hole 8 on the threaded screw 6, and finally reaches the air supply pipe 4. The gas enters the pneumatic cavity 5 through the air holes on the air supply pipe 4, causing the pneumatic cavity 5 to expand slightly. At the same time, since one end of the air supply pipe 4 is communicated with the inner cavity of the bearing 2, the gas enters the inner cavity of the bearing 2, forming a positive pressure environment inside the bearing 2. According to the principle of blocking oil mist by pressure difference, the oil mist in the oil chamber of the bearing 2 is blocked from entering the motor due to the pressure difference.

[0027] Threaded screws 6 are installed at both ends of the cotton braided rubber tube 9, the pipe clamp 11, the filter pressure regulator 12, and the regulating ball valve 13;

[0028] The outer diameter of the inner cover 3 is precisely matched with the dimensions of the relevant part of the bearing 2. Four fixing blocks 16 are fixedly installed on the outer side of the inner cover 3, and the fixing blocks 16 are evenly distributed on the inner cover 3. A sealing gasket 17 is fixedly installed at the bottom of the inner cover 3;

[0029] Please refer to Figure 3 , the precise matching of the outer diameter of the inner cover 3 with the relevant part of the bearing 2 is to ensure accurate fitting in the installation position and prevent gas leakage from the gap between the inner cover 3 and the bearing 2. The four evenly distributed fixing blocks 16 fixedly installed on the outer side are used to firmly fix the inner cover 3 on the bearing 2, and the sealing gasket 17 fixedly installed at the bottom is used to further enhance the sealing effect between the inner cover 3 and the bearing 2. Through precise dimension matching, the fixation of the fixing blocks, and the sealing of the sealing gasket, the sealing effect between the inner cover 3 and the bearing 2 is greatly improved.

[0030] A breather 15 is installed on the bearing 2, and the breather 15 communicates with the inner cavity of the bearing 2;

[0031] Please refer to Figure 2 , during the operation of the bearing 2, the internal air pressure may fluctuate due to factors such as temperature changes, the flow of lubricating oil, and gas leakage. When the air pressure in the inner cavity of the bearing 2 is higher than the external ambient air pressure, the internal gas can be actively discharged through the breather 15 to reduce the air pressure; when the air pressure in the inner cavity of the bearing 2 is lower than the external ambient air pressure, the external gas can enter the inner cavity of the bearing 2 through the breather 15 to increase the air pressure, thereby achieving the balance of the air pressure in the inner cavity of the bearing 2.

[0032] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for blocking and sealing oil mist of a sliding bearing, comprising an exciter (1), characterized in that: Inside the exciter (1), there is a bearing (2) installed. At the end of the bearing (2) close to the motor side, an inner seal cover (3) is fixedly installed. Inside the inner seal cover (3), there is a pneumatic chamber (5). The pneumatic chamber (5) has ductility. Both the inner seal cover (3) and the pneumatic chamber (5) are of hollow structure. A gas supply pipe (4) is installed on the inner seal cover (3). The gas supply pipe (4) penetrates through the pneumatic chamber (5), and one end of the gas supply pipe (4) is communicated with the inner cavity of the bearing (2). At the position of the gas supply pipe (4) inside the inner cavity of the pneumatic chamber (5), there are air holes. On the inner wall of the gas supply pipe (4) away from the bearing (2), there is a thread (7), and a threaded screw (6) is threadedly installed on the thread (7). Both ends of the threaded screw (6) are provided with threads (7). There are multiple threaded screws (6). Inside the threaded screw (6), there is a vent hole (8), and the vent hole (8) is communicated with the gas supply pipe (4). One end of the threaded screw (6) is threadedly installed with a cotton braided rubber hose (9). One end of the cotton braided rubber hose (9) is connected with a seamless steel pipe (10) through the threaded screw (6). There are multiple seamless steel pipes (10). One end of the seamless steel pipe (10) is connected with a pipe clamp (11) through the threaded screw (6). The pipe clamp (11) is connected with a filter pressure regulator (12) through the seamless steel pipe (10) and the threaded screw (6). The filter pressure regulator (12) is connected with a regulating ball valve (13) through the seamless steel pipe (10) and the threaded screw (6). The regulating ball valve (13) is connected with a compressed air main pipe (14) through the seamless steel pipe (10). The seamless steel pipe (10) is welded on the compressed air main pipe (14). The compressed air main pipe (14) is connected to the high-pressure compressed air device in the workshop.

2. The device for blocking and sealing oil mist of a sliding bearing according to claim 1, characterized in that: Pressure gauges are provided on both the filter pressure regulator (12) and the regulating ball valve (13).

3. The device for oil mist blocking and sealing of a sliding bearing according to claim 1, characterized in that: Threaded screws (6) are installed at both ends of the cotton braided rubber hose (9), the pipe clamp (11), the filter pressure regulator (12), and the regulating ball valve (13).

4. A device for blocking and sealing oil mist of a sliding bearing according to claim 1, characterized in that: The outer diameter of the inner seal cover (3) is precisely matched with the relevant part dimensions of the bearing (2).

5. A device for oil mist blocking and sealing of a sliding bearing according to claim 1, characterized in that: Four fixed blocks (16) are fixedly installed on the outer side of the inner seal cover (3). The fixed blocks (16) are evenly distributed on the inner seal cover (3). A sealing gasket (17) is fixedly installed at the bottom of the inner seal cover (3).

6. A device for blocking and sealing oil mist of a sliding bearing, according to claim 1, characterized in that: A breather (15) is installed on the bearing (2), and the breather (15) is communicated with the inner cavity of the bearing (2).

Images