CN-122014545-A - Wind generating set and main bearing cooling device thereof

Abstract

The application provides a wind generating set and a main bearing cooling device thereof, which comprise a mounting bin, a main bearing main body, a cooling liquid conveying pipeline, a cooling liquid backflow pipeline, a cooling liquid circulating pump and a cooling liquid radiator, wherein a rotating shaft is rotatably arranged in the mounting bin, one end of the rotating shaft is fixedly provided with a rotating fan blade, the main bearing main body is used for supporting the rotating shaft of the generating set, one end of the rotating shaft is fixedly provided with the generator main body, and one end of the cooling liquid conveying pipeline is connected with a cooling liquid storage box. According to the application, through the mutual coordination between the cooling liquid circulation system and the main bearing, the high-efficiency heat exchange is realized through the closed circulating cooling liquid, the temperature of the main bearing is obviously reduced, the operation reliability of the generator set is improved, and through the mutual coordination between the flow control valve and the liquid level sensor, the flow of the cooling liquid is intelligently regulated and controlled, the liquid level is monitored in real time, the shortage or excess of the cooling liquid is avoided, and the safe and stable operation of the system is ensured.

Inventors

• ZHANG MENGNAN
• ZHOU HONGDONG
• YU JINGLONG
• WANG JIECHANG
• CHEN DEBIN
• SHAN DAYONG
• YIN LIANG
• CAI JUNLONG
• AN QI
• Ge jiong

Assignees

• 华能国际电力开发公司吉林通榆风电分公司

Dates

Publication Date

20260512

Application Date

20260326

Claims (6)

1. 1. The main bearing cooling device of the wind generating set is characterized by comprising a mounting bin (1), a main bearing body (103), a cooling liquid conveying pipeline (4), a cooling liquid backflow pipeline (5), a cooling liquid circulating pump (6) and a cooling liquid radiator (7), wherein a rotating shaft (2) is rotatably mounted in the mounting bin (1), one end of the rotating shaft (2) is fixedly provided with rotating blades (104), the main bearing body (103) is used for supporting the rotating shaft (2) of the generating set, one end of the rotating shaft (2) is fixedly provided with a generator body (201), one end of the cooling liquid conveying pipeline (4) is connected with a cooling liquid storage box (3), the other end of the cooling liquid conveying pipeline (4) is connected with the main bearing body (103) and used for conveying cooling liquid to the main bearing, one end of the cooling liquid backflow pipeline (5) is connected with the main bearing body (103), the other end of the cooling liquid backflow pipeline (5) is connected with the cooling liquid storage box (3) and used for backflow cooling liquid in the main bearing to the storage box, the cooling liquid circulating pump (6) is arranged on the cooling liquid conveying pipeline (4) and used for driving cooling liquid to flow between the cooling liquid backflow pipeline and the cooling liquid radiator (7) and cooling liquid backflow pipeline (7) is arranged on the cooling liquid backflow pipeline.
2. 2. A wind turbine main bearing cooling arrangement according to claim 1, wherein the main bearing body (103) is provided with a coolant inlet (101) and a coolant outlet (102), wherein the coolant delivery conduit (4) is connected to the coolant inlet (101) and wherein the coolant return conduit (5) is connected to the coolant outlet (102).
3. 3. The cooling device for the main bearing of the wind generating set according to claim 1, wherein the cooling liquid conveying pipeline (4) and the cooling liquid return pipeline (5) are respectively provided with a flow control valve (8) for adjusting the flow of the cooling liquid.
4. 4. The main bearing cooling device of the wind generating set is characterized in that a liquid level sensor (9) is arranged in the cooling liquid storage box (3) and used for monitoring the liquid level height of cooling liquid in real time.
5. 5. The cooling device for the main bearing of the wind generating set according to claim 1, wherein the cooling liquid circulating pump (6) is a variable frequency pump, and the rotating speed can be automatically adjusted according to the temperature of cooling liquid.
6. 6. A wind power plant comprising a main bearing cooling arrangement according to any one of claims 1 to 5.

Description

Wind generating set and main bearing cooling device thereof Technical Field The invention relates to the technical field of generator set cooling, in particular to a wind turbine generator set and a main bearing cooling device thereof, and belongs to the technical field of mechanical engineering cooling. Background When the wind generating set generates electricity, the output electricity frequency is ensured to be constant. This is necessary for both fan-grid power generation and wind-solar hybrid power generation. The constant frequency of wind power is ensured, one way is to ensure the constant rotation speed of the generator, namely the constant-speed and constant-frequency operation way, and the rotation speed of the wind turbine is definitely constant because the generator is driven by the wind turbine through a transmission device, so that the conversion efficiency of wind energy can be influenced; the other mode is that the rotation speed of the generator changes along with the wind speed, and the frequency of the output electric energy is ensured to be constant by other means, namely, the variable speed constant frequency operation is realized; In the prior art, the main bearing of the generator set is easy to generate overheat problem during high-speed operation, so that the abrasion of the bearing is aggravated, the efficiency is reduced, even equipment faults are caused, the heat dissipation efficiency of the traditional cooling mode is low, and the continuous operation requirement of the high-power generator set cannot be met; For this purpose, a wind turbine generator system and a main bearing cooling device thereof are proposed. Disclosure of Invention In view of the above, the present invention provides a wind turbine generator system and a main bearing cooling device thereof, which solve or alleviate the technical problems existing in the prior art, and at least provide an advantageous choice. The technical scheme is that the wind generating set and the main bearing cooling device thereof comprise a mounting bin, a main bearing main body, a cooling liquid conveying pipeline, a cooling liquid backflow pipeline, a cooling liquid circulating pump and a cooling liquid radiator, wherein a rotating shaft is rotatably arranged in the mounting bin, one end of the rotating shaft is fixedly provided with a rotating fan blade, the main bearing main body is used for supporting the rotating shaft of the generating set, one end of the rotating shaft is fixedly provided with a generator main body, one end of the cooling liquid conveying pipeline is connected with a cooling liquid storage box, the other end of the cooling liquid conveying pipeline is connected with the main bearing main body and is used for conveying cooling liquid to the main bearing, one end of the cooling liquid backflow pipeline is connected with the main bearing main body, the other end of the cooling liquid backflow pipeline is connected with the cooling liquid storage box and is used for backflow of cooling liquid in the main bearing to the storage box, the cooling liquid circulating pump is arranged on the cooling liquid conveying pipeline and is used for driving the cooling liquid to circularly flow between the conveying pipeline and the backflow pipeline, and the cooling liquid radiator is arranged on the cooling liquid backflow pipeline and is used for reducing the temperature of the cooling liquid. Further preferably, the main bearing body is provided with a coolant inlet and a coolant outlet, the coolant delivery pipe is connected to the coolant inlet, and the coolant return pipe is connected to the coolant outlet. Further preferably, the cooling liquid conveying pipeline and the cooling liquid return pipeline are both provided with flow control valves for adjusting the flow of the cooling liquid. Further preferably, a liquid level sensor is arranged in the cooling liquid storage tank and used for monitoring the liquid level height of the cooling liquid in real time. Further preferably, the cooling liquid circulating pump is a variable frequency pump, and the rotating speed can be automatically adjusted according to the temperature of the cooling liquid. A wind generating set comprises the main bearing cooling device. By adopting the technical scheme, the embodiment of the invention has the following advantages: 1. According to the invention, through the mutual matching between the cooling liquid circulation system and the main bearing, the efficient heat exchange is realized through the closed circulating cooling liquid, the temperature of the main bearing is obviously reduced, and the operation reliability of the generator set is improved. 2. According to the intelligent cooling system, the flow control valve and the liquid level sensor are matched, and the flow of the cooling liquid is intelligently regulated and controlled, so that the liquid level is monitored in real time, the shortage or excess of the cooling liquid is