Dongfang Electric's first Oriental 2.5 MW permanent magnet direct drive fan off the assembly line

On December 10, the first Oriental 2.5 MW permanent magnet direct-drive wind turbine was successfully launched at Dongfang Electric New Energy Equipment (Hangzhou) Co., Ltd. The unit is based on the successful operation of 1.5 MW permanent magnet direct-drive wind turbines by Dongfang New Energy Co., Ltd., and is completely self-developed in combination with the world's most advanced design concepts and design methods. Wang Ji, chairman of Dongfang Electric Group, said that at present, Dongfang Electric has initially formed a technology development pattern for research and development of various types of wind turbines, a complete range of products for land and sea wind farms, and the successful launch of 2.5 MW permanent magnet direct-drive fans. It marks that Dongfang Electric has made great achievements in the field of wind power, and it is of great significance to promote the localization of equipment for large-scale wind turbines in China.
In June 2010, Dongfang Electric New Energy Co., Ltd. began to independently design, research and develop and manufacture large-scale onshore new-generation permanent magnet direct-drive wind turbines with completely independent intellectual property rights according to market demand. After a year and a half, the first 2.5 MW permanent magnet direct drive wind turbine was successfully launched. The center of the fan hub is 80 meters high and the diameter of the wind wheel is 103 meters. It adopts direct drive + permanent magnet synchronous motor + full power converter technology, which is suitable for the second and third types of wind farms on the land, and continues the advantages of direct drive permanent magnet technology. Innovate and optimize the product structure design and electronic control system, compared with most wind turbines of the same capacity on the market, on the basis of better performance, lighter weight, power generation efficiency, reliability, grid adaptability, etc. Excellent performance on key indicators, in the future, in the installation, transportation, hoisting, maintenance and other aspects, will also reflect better performance value and economic indicators.
Dongfang Electric Co., Ltd., the parent company of Dongfang Electric New Energy Co., Ltd., as a large state-owned enterprise in China's power generation equipment manufacturing, has accumulated considerable technical strength in the research and development and manufacture of power generation equipment. To this end, Dongfang New Energy Company has established a development route with international cooperation, high starting point and sustainable development in combination with the development trend of wind power technology and the advantages and characteristics of Dongfang Electric. Especially in the technical route, the new energy company has chosen a direct-drive wind turbine that represents high reliability and high power generation. It cooperates with the famous wind power design technology company in Europe and combines with the world's most advanced design concepts and design methods. The successful development of the Oriental 1.5 MW direct-drive wind turbine has been mass-produced and passed the A-level design evaluation and type certification of the internationally renowned certification company TüV SÜD in accordance with the GL guidelines. Liu Hui, secretary of the Party Committee of Dongfang Electric, said that the downline of the 2.5 MW direct-drive wind turbine is of great significance for the development of Dongfang New Energy Company. The future 2 MW to 3 MW units will be the main models of the onshore wind turbine market. The downline of the new energy company's 2.5 MW direct-drive wind turbine enriches the company's product line and will effectively enhance its competitiveness. According to reports, Dongfang Electric New Energy Co., Ltd. will gradually introduce 6 MW, 10 MW and other wind turbines with higher power, more adaptability and more advanced technology, bringing more and better choices to the market and users.

The hydraulic filter is an indispensable auxiliary component for the hydraulic system. The function of the hydraulic filter is to remove solid contaminants from the working medium of the hydraulic system, keep the working medium clean, extend the life of the system components, and ensure the hydraulic components. Reliable performance.
    Hydraulic Filters can be divided into: oil suction filter, pressure filter and oil return filter according to their use and installation location. According to different working pressures, it can be divided into: low pressure filter, medium pressure filter and high pressure filter.
   The following aspects should be considered when selecting a filter:
      1. Select the type of filter according to the purpose of use (use), and select the installation shape of the filter according to the installation position.
      2, the filter should have a large enough oil-passing capacity, and the pressure loss is small
      3, the filtration accuracy should meet the required cleanliness of the hydraulic system or components
      4. The Filter Material used in the filter element should meet the requirements of the working medium used and have sufficient strength.
      5. The strength and pressure loss of the filter are the key factors to be considered when selecting. After installing the filter, it will cause partial pressure drop or back to the system.
      6, the filter replacement and cleaning should be convenient
      7. Appropriate filter protection accessories (such as constant pressure opening device with bypass valve and filter contamination indicator) should be selected according to system requirements.
      Therefore, when designing the hydraulic system, determine which filters need to be placed at those locations.
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