Doubly-fed generator set carbon emission air outlet device

Abstract

A doubly-fed generator set carbon discharge air outlet device comprises a carbon discharge pipe and a carbon filter washing box communicated with the carbon discharge pipe in a butt joint mode, the carbon discharge pipe is connected with a slip ring chamber of a doubly-fed generator set, and an air discharge pipe for discharging air outwards is arranged on the carbon filter washing box. The carbon filter washing box is characterized by comprising a water tank filled with liquid and a carbon powder filter which is arranged in the water tank and can filter carbon powder, the carbon discharge pipe extends into the liquid in the water tank, and the carbon powder filter is immersed in the liquid in the water tank and is close to the carbon discharge pipe. According to the utility model, the exhausted air does not pollute the external environment, the pollution corrosives outside the engine room are prevented from entering the slip ring chamber along the carbon discharge pipe, the safety of carbon discharge is improved, and the carbon discharge air outlet device is suitable for the carbon discharge air outlet of the doubly-fed wind generating set on the sea or in a heavy pollution environment, and the application scene of the doubly-fed wind generating set is expanded.

Description

Technical Field

[0001] The utility model relates to a carbon exhaust and air outlet device for a doubly-fed generator set, belonging to the technical field of doubly-fed wind generator sets. Background Art

[0002] When the doubly-fed generator set is running, the relative rotation of the carbon brushes and the slip rings in the slip-ring motor will cause friction and generate a large amount of carbon powder and heat. If the hot air with carbon powder is not discharged in time, it will cause adverse phenomena such as slip ring fire and increased wear of carbon brushes. Even more seriously, it will cause the unit to shut down. In order to discharge the carbon powder, a carbon exhaust fan (blower) is generally installed on the slip ring chamber, or a slip ring fan is installed on the motor shaft to discharge the carbon powder generated by the slip ring out of the slip ring chamber through the carbon exhaust pipe. For smooth carbon exhaust, the carbon exhaust pipe is directly connected to the atmosphere outside the cabin.

[0003] Offshore doubly-fed wind turbines have high power and rotor currents, necessitating a larger number of carbon brushes in the slip-ring brush holder system. Consequently, the operation of the doubly-fed generator generates more carbon dust. In offshore environments, salt spray from outside the nacelle can enter the slip-ring chamber via the carbon exhaust pipe, corroding the slip rings. Salt spray can even enter the nacelle from there, corroding components within. Furthermore, due to marine environmental protection requirements, carbon dust cannot be discharged outside the nacelle. Since the nacelle is a confined space, any carbon dust released inside could cause failure of other electronic components, such as the inverter. When doubly-fed generators are used offshore or in heavily polluted environments, preventing external contaminants from entering the nacelle while effectively discharging carbon dust from the generator to prevent contamination of the nacelle and the external environment are key considerations. Utility Model Content

[0004] The carbon exhaust and air outlet device for a doubly-fed wind turbine generator set provided by the utility model ensures that the exhausted air will not pollute the external environment, and ensures that pollutants and corrosive substances outside the cabin will not enter the slip ring chamber along the carbon exhaust pipe, thereby improving the safety of carbon exhaust. The utility model is suitable for the carbon exhaust and air outlet of doubly-fed wind turbine generator sets at sea or in heavily polluted environments, and expands the application scenarios of doubly-fed generator sets.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The carbon exhaust and air outlet device of the doubly fed generator set includes a carbon exhaust pipe and a carbon filter washing box connected to the carbon exhaust pipe, the carbon exhaust pipe is connected to the slip ring chamber of the doubly fed generator set, and the carbon filter washing box has an exhaust duct for discharging air to the outside. It is characterized in that: the carbon filter washing box includes a water tank filled with liquid and a carbon powder filter installed in the water tank and capable of filtering carbon powder, the carbon exhaust pipe extends into the liquid in the water tank, the carbon powder filter is immersed in the liquid in the water tank and is close to the carbon exhaust pipe.

[0007] Preferably, the carbon powder filter includes a box body with openings at both ends and a filter unit, the filter unit includes two layers of steel mesh and filter cotton laid between the two layers of steel mesh, the box body has a guide groove that cooperates with the end of the filter unit, and the filter unit is inserted into the guide groove.

[0008] Preferably, the number of the filter units does not exceed four layers, the multi-layer filter units are evenly spaced in the box body, and the multi-layer filter units are only arranged in the front half of the box body.

[0009] Preferably, the inner wall of the box is equipped with a vent seat 1 and a vent seat 2 whose length is greater than that of the vent seat 1, the guide groove that cooperates with one end of the filter unit is fixed on the vent seat 1, and the guide groove that cooperates with the other end of the filter unit is fixed on the vent seat 2, and both the vent seat 1 and the vent seat 2 are ventilated along the arrangement direction of the filter units.

[0010] Preferably, the vent seat 1 and the vent seat 2 located on the same side of the inner wall of the box are alternately arranged along the arrangement direction of the filter units.

[0011] Preferably, the filter cotton in the innermost filter unit is laid in a U-shaped pattern between two layers of steel wire mesh, and no filter cotton is laid in the middle of the steel wire mesh.

[0012] The beneficial effects of the utility model are:

[0013] The carbon filter and washing box in the carbon exhaust and air outlet device of the doubly fed generator set of the present invention includes a water tank filled with liquid and a carbon powder filter. The carbon powder filter is immersed in the liquid in the water tank and is close to the carbon exhaust pipe. The hot air with carbon powder discharged from the slip ring chamber enters the water tank through the carbon exhaust pipe, where the heat is absorbed by the liquid, and the carbon powder is filtered and adsorbed by the carbon powder filter immersed in the liquid, so that the hot air with carbon powder is filtered and washed into pollution-free air without carbon powder and is discharged from the exhaust pipe, ensuring that the exhausted air does not pollute the external environment. The exhaust pipe is arranged on the water tank, and pollutants and corrosive substances outside the cabin can only enter the water tank along the exhaust pipe and be absorbed by the liquid, ensuring that pollutants and corrosive substances outside the cabin do not enter the slip ring chamber along the carbon exhaust pipe, ensuring that the equipment in the cabin is not polluted and corroded due to carbon exhaust, thereby improving the safety of carbon exhaust. The utility model is suitable for carbon exhaust and air outlet of doubly fed wind turbines at sea or in heavily polluted environments, and expanding the application scenarios of doubly fed generators. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the carbon exhaust and air outlet device of the doubly-fed generator set of the present invention.

[0015] Figure 2 Schematic diagram of the carbon filter washing box.

[0016] Figure 3 for Figure 2 A partial enlarged schematic diagram. DETAILED DESCRIPTION

[0017] The following combination Figures 1-3 The embodiments of the present utility model are described in detail.

[0018] The carbon exhaust and air outlet device of the doubly fed generator set includes a carbon exhaust pipe 1 and a carbon filter washing box 2 connected to the carbon exhaust pipe 1. The carbon exhaust pipe 1 is connected to the slip ring chamber 3 of the doubly fed generator set. The carbon filter washing box 2 has an exhaust pipe 21 for discharging air to the outside. It is characterized in that: the carbon filter washing box 2 includes a water tank 4 filled with liquid and a carbon powder filter 5 installed in the water tank 4 and capable of filtering carbon powder. The carbon exhaust pipe 1 extends into the liquid in the water tank 4, and the carbon powder filter 5 is immersed in the liquid in the water tank 4 and close to the carbon exhaust pipe 1.

[0019] The carbon filter and washing box 2 in the above-mentioned doubly fed generator set carbon exhaust air outlet device includes a water tank 4 filled with liquid and a carbon powder filter 5. The carbon powder filter 5 is immersed in the liquid in the water tank 4 and is close to the carbon exhaust pipe 1. The hot air with carbon powder discharged from the slip ring chamber 3 enters the water tank 4 through the carbon exhaust pipe 2, where the heat is absorbed by the liquid, and the carbon powder is filtered and adsorbed by the carbon powder filter 5 immersed in the liquid, so that the hot air with carbon powder is filtered and washed into pollution-free air without carbon powder and discharged from the exhaust pipe 21, ensuring that the exhausted air does not pollute the external environment. The exhaust pipe 21 is arranged on the water tank 1, and the pollutants and corrosive substances outside the cabin can only enter the water tank 1 along the exhaust pipe 21 and be absorbed by the liquid, ensuring that the pollutants and corrosive substances outside the cabin will not enter the slip ring chamber 3 along the carbon exhaust pipe 1, ensuring that the equipment in the cabin is not polluted and corroded due to carbon exhaust, thereby improving the safety of carbon exhaust. The device is suitable for carbon exhaust and air outlet of doubly fed wind turbines at sea or in heavily polluted environments, and expanding the application scenarios of doubly fed generators.

[0020] Among them, the carbon powder filter 5 includes a box body 6 with openings at both ends and a filter unit 7. The filter unit 7 includes two layers of steel wire mesh 71 and filter cotton 72 laid between the two layers of steel wire mesh 71. The box body 6 has a groove 61 that cooperates with the end of the filter unit 7, and the filter unit 7 is inserted into the guide groove 61. As can be seen from the attached drawings, the box is not full of liquid, the liquid immerses the carbon powder filter 5, the filter cotton 72 in the filter unit 7 is immersed in the liquid, the filter cotton 72 is filled with liquid, and the air with carbon powder is divided by the filter unit 7. A part of the carbon powder is filtered and adsorbed by the filter cotton, and the other part of the carbon powder is washed by the liquid, so that the air discharged from the exhaust pipe 21 is pollution-free air without carbon powder. The two layers of steel mesh 71 and filter cotton 72 form a layered filter unit 7, and the guide groove 61 guides and positions the filter unit 7, and facilitates the disassembly, assembly and replacement of the filter unit 7. In order to facilitate the removal of the filter unit 7 from the box 6, a movable door can be set on the top of the box 6 to periodically replace the filter unit 7 and clean the box 6 to ensure the reliability and effectiveness of carbon powder filtration.

[0021] The number of the filter units 7 does not exceed four layers, and the multi-layer filter units 7 are evenly spaced in the box body, and the multi-layer filter units 6 are only arranged in the front half of the box body 7. The multi-layer filter units 7 are arranged in the box body 6 to ensure that the carbon powder in the air is adsorbed by the multi-layer filtration, thereby improving the reliability of the filtration. If the number of filter units 7 arranged in the box body 6 is too many or multiple filter units 6 are arranged in both the front half and the back half of the box body 6, the fluidity of the air in the box body 6 will be reduced, thereby reducing the exhaust speed and exhaust volume of the exhaust pipe 21. The number of filter units 7 does not exceed four layers and is all arranged in the front half of the box body 6. While effectively adsorbing the carbon powder in the air, the fluidity of the air in the box body 6 is ensured, thereby ensuring the exhaust speed and exhaust volume of the exhaust pipe 21.

[0022] The inner wall of the housing 6 is equipped with a vent seat 1 62 and a vent seat 2 63, which is longer than the vent seat 1 62. A guide groove 61 that mates with one end of the filter unit 7 is fixed to the vent seat 1 62, while a guide groove 61 that mates with the other end of the filter unit 5 is fixed to the vent seat 2 63. Both the vent seat 1 62 and the vent seat 2 63 vent along the direction in which the filter units are arranged. The arrangement of the vent seat 1 62 and the vent seat 2 63 creates an air passage of a certain width between adjacent filter units 7 and between the filter units 7 and the internal cavity of the housing 6, ensuring effective air circulation between adjacent filter units 7, further improving the flow performance of the air within the housing 6, and thereby ensuring the exhaust speed and exhaust volume of the exhaust pipe 21.

[0023] The vent seats 1 62 and 2 vent seats 63 located on the same side of the inner wall of the housing 6 are alternately arranged along the arrangement direction of the filter units 7. The vent seats 1 62 and 2 vent seats 63 located on the same side of the inner wall of the housing 6 are alternately arranged so that the vent seats 1 62 and 2 vent seats 63 at the same end of the filter units 7 of adjacent layers are aligned. This allows air to form a circuitous, cross-shaped flow path within the multi-layer filter units 7, extending the air flow path within the housing 6, ensuring that carbon powder in the air can be filtered and absorbed by the multi-layer filter units 7, improving the filtration reliability of the carbon powder, reducing the carbon content of the air discharged from the exhaust pipe 21, and improving the filtration reliability of the carbon powder.

[0024] The innermost filter unit 7 has filter cotton laid in a U-shaped pattern between the two layers of steel mesh, with no filter cotton laid in the middle of the steel mesh. This allows air to pass directly through the innermost filter unit 7, further improving the air flow within the housing 6 and ensuring that the filtered and washed air is promptly discharged from the exhaust duct 21, improving exhaust flow.

[0025] The above is a complete description of the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the embodiments described are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A carbon exhaust and air outlet device for a doubly-fed generator set, comprising a carbon exhaust pipe and a carbon filter washing box connected to the carbon exhaust pipe, wherein the carbon exhaust pipe is connected to the slip ring chamber of the doubly-fed generator set, and the carbon filter washing box is provided with an exhaust pipe for exhausting air to the outside, characterized in that: The carbon filter washing box includes a water tank filled with liquid and a carbon powder filter installed in the water tank and capable of filtering carbon powder. The carbon exhaust pipe extends into the liquid in the water tank, and the carbon powder filter is immersed in the liquid in the water tank and close to the carbon exhaust pipe.

2. The carbon exhaust and air outlet device for a doubly-fed generator set according to claim 1, characterized in that: The carbon powder filter comprises a box body with openings at both ends and a filter unit. The filter unit comprises two layers of steel mesh and filter cotton laid between the two layers of steel mesh. The box body has a guide groove that matches the end of the filter unit, and the filter unit is inserted into the guide groove.

3. The carbon exhaust and air outlet device for a doubly-fed generator set according to claim 2, characterized in that: The number of the filter units does not exceed four layers, and the multi-layer filter units are evenly spaced in the box body, and the multi-layer filter units are only arranged in the front half of the box body.

4. The carbon exhaust and air outlet device for a doubly-fed generator set according to claim 2, characterized in that: The inner wall of the box is equipped with a vent seat 1 and a vent seat 2 which is longer than the vent seat 1. The guide groove that cooperates with one end of the filter unit is fixed on the vent seat 1, and the guide groove that cooperates with the other end of the filter unit is fixed on the vent seat 2. Both the vent seat 1 and the vent seat 2 are ventilated along the arrangement direction of the filter units.

5. The carbon exhaust and air outlet device for a doubly-fed generator set according to claim 4, characterized in that: The first vent seat and the second vent seat located on the same side of the inner wall of the box are alternately arranged along the arrangement direction of the filter units.

6. The carbon exhaust and air outlet device for a doubly-fed generator set according to claim 2, characterized in that: In the innermost filter unit, the filter cotton is laid in a U-shape between two layers of steel mesh, and no filter cotton is laid in the middle of the steel mesh.

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