Cooling device for bearing seat of boiler induced draft fan

Abstract

The utility model discloses a boiler induced draft fan bearing seat cooling device which comprises a fixed end bearing seat, a free end bearing seat and a hydraulic coupler, through holes are formed in the middle of an upper cover of the fixed end bearing seat and the middle of an upper cover of the free end bearing seat respectively, and an oil nozzle is fixedly connected to each through hole. The inlet end of each oil nozzle is connected with an oil inlet pipe, the oil inlet pipe is connected with an oil outlet pipe of the hydraulic coupler, oil return openings are formed in the lower portion of the fixed end bearing seat and the lower portion of the free end bearing seat respectively, each oil return opening is connected with an oil return pipe, and the oil return pipe is connected with an oil inlet formed in the lower portion of the hydraulic coupler. The oil spray nozzle is connected into an existing lubricating system, oil is sprayed into the position between the outer ring and the inner ring of the bearing, cooling of the bearing is achieved, the overall structure is simple, use is reliable, cooling water is not needed, and the situation that the bearing is damaged due to high temperature is avoided.

Description

Technical field:

[0001] The utility model relates to the technical field of induced draft fans, in particular to a cooling device for a bearing seat of an induced draft fan of a boiler. Background technology:

[0002] The free end of the main shaft of the boiler induced draft fan is equipped with a free end bearing seat, and the fixed end of the main shaft of the boiler induced draft fan is equipped with a fixed end bearing seat. The main shaft end equipped with the fixed end bearing seat is connected to the output shaft end of the motor through a hydraulic coupler. The motor drives the drive shaft to rotate, thereby driving the boiler induced draft fan to operate. The boiler induced draft fan needs to operate continuously for a long time. During the operation, it is affected by the heat generated by the rolling friction of the bearing and the heat transferred by the main shaft, which causes the bearing temperature to rise and the lubricating oil in the bearing to oxidize, thereby causing damage to the bearing. At present, bearings are cooled by water cooling, which has the following disadvantages: (1) Water cooling requires the addition of a water supply system, which requires uninterrupted water supply, consumes a lot of water, and increases the cost of operation and maintenance; (2) In water-scarce areas, when water consumption is high in summer and the temperature of the cooling water is high, the water supply is insufficient, which can cause the bearing to heat up and be damaged; (3) The bearing seat is manufactured by casting, and the thickness of the water chamber is only 10 mm. During casting, some parts have pores and slag inclusions. Therefore, during use, the cooling water chamber is prone to rupture and the cooling water leaks into the oil chamber, causing the lubricating oil to emulsify and the bearing to be damaged by high temperature due to lack of oil. Utility model content:

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a boiler induced draft fan bearing seat cooling device.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a boiler induced draft fan bearing seat cooling device, including a fixed-end bearing seat, a free-end bearing seat, and a hydraulic coupler, characterized in that through holes are respectively opened in the middle of the upper cover of the fixed-end bearing seat and the middle of the upper cover of the free-end bearing seat, and an oil nozzle is fixedly connected to each of the through holes, and the inlet end of each of the oil nozzles is connected to an oil inlet pipe, and the oil inlet pipe is connected to the oil outlet pipe of the hydraulic coupler, and oil return ports are respectively provided at the lower part of the fixed-end bearing seat and the lower part of the free-end bearing seat, and each of the oil return ports is connected to the oil return pipe, and the oil return pipe is connected to the oil inlet port arranged at the lower part of the hydraulic coupler.

[0005] Furthermore, the oil spray nozzle is located at one side of the bearing end surface, and a plurality of oil spray holes are formed on the oil spray nozzle, and the oil spraying direction of the oil spray holes is toward between the outer ring and the inner ring of the bearing.

[0006] Furthermore, the diameter of the fuel injection hole of the fuel injection nozzle is 0.1 mm.

[0007] Furthermore, the oil inlet is arranged below the oil baffle of the hydraulic coupling.

[0008] Furthermore, flow regulating valves are provided on the oil inlet pipe and the oil return pipe respectively.

[0009] Furthermore, the oil return port is arranged at the high level scale line of the oil mirror.

[0010] The beneficial effects of the utility model are as follows: the utility model connects the oil spray nozzle to the existing lubrication system, sprays oil into between the outer ring and the inner ring of the bearing, realizes the cooling of the bearing, has a simple overall structure, is reliable to use, does not require cooling water, and avoids the bearing being damaged due to high temperature. Description of the drawings:

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a cross-sectional view of the upper part of the free end bearing seat of the utility model.

[0014] Figure 3 This is a partial enlarged view of the practical fuel injection nozzle.

[0015] In the figure: fixed end bearing seat 1, free end bearing seat 2, hydraulic coupling 3, through hole 4, oil nozzle 5, oil inlet pipe 6, oil outlet pipe 7, oil return port 8, oil return pipe 9, oil inlet port 10, bearing 11, flow regulating valve 12, oil mirror 13. Specific implementation method:

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Combination Figure 1-3As shown, the utility model is a boiler induced draft fan bearing seat cooling device, comprising a fixed end bearing seat 1, a free end bearing seat 2, and a hydraulic coupler 3. Through holes 4 are respectively opened in the middle of the upper cover of the fixed end bearing seat 1 and the middle of the upper cover of the free end bearing seat 2. An oil spray nozzle 5 is fixedly connected to each through hole 4. The oil spray nozzle 5 is located on one side of the end face of the bearing 11. A plurality of oil spray holes are opened on the oil spray nozzle 5. The diameter of the oil spray hole is 0.1mm to ensure good oil atomization. The oil spray hole sprays oil toward between the outer ring and the inner ring of the bearing 11 to ensure the cooling effect of the oil on the bearing 11. The inlet end of each oil spray nozzle 5 is connected to the oil inlet pipe 6, and the oil inlet pipe 6 is connected to the oil outlet pipe 7 of the hydraulic coupler 3. The lower part of the seat 1 and the lower part of the free end bearing seat 2 are respectively provided with oil return ports 8, and the oil return ports 8 are arranged at the high scale line of the oil mirror 13. When the oil level is higher than the oil return port 8, oil return is carried out to ensure the lubricating oil level of the bearing 11, and at the same time prevent the oil level from being too high, resulting in oil leakage at the end covers of the fixed end bearing seat 1 and the free end bearing seat 2. Each oil return port 8 is connected to an oil return pipe 9, and the oil return pipe 9 is connected to an oil inlet 10 arranged at the lower part of the hydraulic coupling 3. The oil inlet 10 is arranged below the oil baffle of the hydraulic coupling 3 to prevent the oil from being directly sprayed into the hydraulic coupling 3, causing the pump wheel to carry oil, and then causing oil to be thrown at the breathing hole. Flow regulating valves 12 are respectively provided on the oil inlet pipe 6 and the oil return pipe 9 to control the oil volume and oil pressure of the oil.

[0018] Working principle:

[0019] During operation, the hydraulic coupling 3 provides pressurized oil, and the appropriate oil volume and oil pressure are set by the flow control valve 12. The oil is sprayed into the space between the outer ring and the inner ring of the bearing 11 through the oil nozzle 5 to cool the bearing 11. When the oil level in the fixed end bearing seat 1 and the free end bearing seat 2 is higher than the oil return port 8, the oil is returned and the excess oil in the bearing seat is sent to the hydraulic coupling 3 to cool the bearing seat.

[0020] The above description is only a preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention and does not impose any form of limitation on the present invention. Any person with ordinary knowledge in the relevant technical field, if it does not depart from the scope of the technical features of the present invention, uses the equivalent embodiments made by partial changes or modifications of the technical content disclosed in the present invention, and does not depart from the technical features of the present invention, all still fall within the scope of the technical features of the present invention.

Claims

1. A boiler induced draft fan bearing seat cooling device, comprising a fixed end bearing seat, a free end bearing seat, and a hydraulic coupler, characterized in that: Through holes are respectively opened in the middle of the upper cover of the fixed-end bearing seat and the middle of the upper cover of the free-end bearing seat, and an oil nozzle is fixedly connected to each of the through holes. The inlet end of each of the oil nozzles is connected to the oil inlet pipe, and the oil inlet pipe is connected to the oil outlet pipe of the hydraulic coupling. Oil return ports are respectively provided at the lower part of the fixed-end bearing seat and the lower part of the free-end bearing seat, and each of the oil return ports is connected to the oil return pipe, and the oil return pipe is connected to the oil inlet arranged at the lower part of the hydraulic coupling.

2. A boiler induced draft fan bearing seat cooling device according to claim 1, characterized in that: The oil spray nozzle is located at one side of the bearing end surface, and a plurality of oil spray holes are formed on the oil spray nozzle. The oil spraying direction of the oil spray holes is toward between the outer ring and the inner ring of the bearing.

3. A boiler induced draft fan bearing seat cooling device according to claim 1 or 2, characterized in that: The diameter of the oil injection hole of the oil injection nozzle is 0.1 mm.

4. The boiler induced draft fan bearing seat cooling device according to claim 1, characterized in that: The oil inlet is arranged below the oil baffle of the hydraulic coupler.

5. The boiler induced draft fan bearing seat cooling device according to claim 1, characterized in that: Flow regulating valves are respectively provided on the oil inlet pipe and the oil return pipe.

6. The boiler induced draft fan bearing seat cooling device according to claim 1, characterized in that: The oil return port is arranged at the high level mark of the oil mirror.

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