Yunda Co., Ltd. Obtains Patent for Offshore Wind Turbine Unit; Offshore Wind Turbine Nacelle System Resolves High Salt Spray Heat Dissipation Contradiction

March 24 News: According to information from the National Intellectual Property Administration, Yunda Energy Technology Group Co., Ltd. has applied for a patent titled “A Marine Wind Power Double-Fed Generator Set and Its Nacelle System and Cooling Method,” with authorization announcement number CN121452142B, granted on March 17, 2026. The application publication number is CN121452142A, application number CN202610003017.5, published on March 17, 2026. The application was filed on January 5, 2026. Inventors include Chen Zhongya, Lü Xufeng, Zhou Mengyu, Liang Bin, Ji Xu, Liu Yibei, and Chen Tong. The patent agency is Beijing Jiajia Intellectual Property Agency Co., Ltd., with patent agent Shao Shuai. Classification codes include F03D80/60, H02K9/04, H02K9/26, H02K5/10, H02K5/12, H02K7/116, H02K7/18, B01D46/30, B01D46/60, H02K9/28, F03D15/00, F03D9/25, F16H57/04.

The patent abstract discloses a marine wind power double-fed generator set and its nacelle system with cooling methods, involving generator technology. The nacelle system includes: a nacelle cover; a fresh air supply module, with its air intake end penetrating the nacelle cover to connect to the outside of the nacelle, and the exhaust end connected to the nacelle, used to supply filtered clean air to establish and maintain a slight positive pressure environment inside the nacelle and to purge the gearbox for cooling; an air-cooled gearbox module, including a first fan cover covering the gearbox cooling part, penetrating the nacelle cover to connect to the outside, forming a first air duct isolated from the nacelle; a generator air-cooling module, including a second fan cover covering the generator cooling part, penetrating the nacelle cover to connect to the outside, forming a second air duct isolated from the nacelle, with the second air intake located inside the nacelle and equipped with a damper. This nacelle system addresses the issues of poor airtightness and insufficient cooling capacity in traditional air-cooled designs in high-salt mist offshore environments.

Yunda Co., Ltd. was established on November 30, 2001, and listed on the Shenzhen Stock Exchange on April 26, 2019. Its registered address and office are in Hangzhou, Zhejiang Province. The company is a leading domestic wind turbine manufacturer, focusing on R&D and manufacturing of large wind turbines, with strong technical accumulation and full industry chain advantages.

Yunda’s main business includes R&D, production, and sales of large wind turbines, categorized under the Shenwan industry “Power Equipment - Wind Power Equipment - Wind Turbines,” involving concepts such as energy storage, offshore wind power, and wind energy.

In 2025, Yunda’s revenue reached 29.402 billion yuan, ranking first in the industry, with industry average and median figures matching. Main business revenue breakdown: wind turbine sales 26.434 billion yuan (89.90%), new energy engineering EPC services 1.454 billion yuan (4.94%), other income 1.131 billion yuan (3.85%), power generation income 384 million yuan (1.31%). Net profit was 335 million yuan, also ranking first in the industry, matching industry averages and medians.

Recent patent applications by Yunda Energy Technology Group Co., Ltd. are as follows:

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