The production and installation of large hydropower units in China have achieved important results! At 4:15 pm on July 8, the first domestically produced 700,000 kW unit, Unit 26, manufactured by Harbin Electric Machinery Co., Ltd., successfully completed the 72-hour trial run. The test operation results show that the unit is stable in operation, and the temperature, vibration swing and flow rate of each part are normal, which meets the design requirements.
Li Yongan, general manager of China Three Gorges Corporation, stressed at the coordination meeting of the commissioning site of Unit 26 that the completion of the 72-hour trial run of Unit 26 is an important phased achievement of the goal of localization of large-scale hydropower units, and the manufacture and installation of the latter units. To a good demonstration role, all parties involved in the construction must, as always, work together to ensure the realization of the "first stable 100 days" goal.
A person from Harbin Electric Machinery Co., Ltd. told the reporter that the right bank power station of the Three Gorges Project is a giant hydroelectric power generation with independent intellectual property rights designed and manufactured by Harbin Electric through the national implementation of the strategy of “introduction, digestion, absorption and re-innovationâ€. unit. Compared with the left bank power station, the units of the right bank power station have undergone comprehensive innovations in the turbines and hydro-generators, which has brought the manufacturing level of China's hydropower units to a new height.
After more than 50 years of hard work, Harbin Electric has made remarkable achievements in the development of hydropower units and the development of its mixed flow units.
In the 12 hydropower units of the Three Gorges right bank power station, four 700,000 kW large-scale mixed-flow hydropower units with independent intellectual property rights manufactured by Harbin Electric Machinery, the three highlights cast the brilliant power of the Haxia Three Gorges unit.
Highlight 1: Eliminate the long-term trouble of turbine pressure pulsation
The Three Gorges Left Bank Turbine Runner has a diameter of more than 10 meters and is the largest Francis turbine in the world today. Due to flood control requirements, the unit's operating head is from 61 to 113 meters, the maximum head and rated head ratio are large, and the operating conditions are complicated. The turbine vibrates at a certain power.
Although the efficiency of the Three Gorges Left Bank Runners, which has been introduced by many well-known power generation equipment manufacturers abroad, has reached the requirements, the pressure fluctuations are always unsatisfactory due to the large changes in the head of the power station. This is a worldwide problem.
The bidding of the right bank unit is an irrelevant test that can be done by Harbin Electric. Since 1997, Harbin has carried out secondary development and innovation on the basis of introducing technology and digesting and absorbing foreign company fluid calculation software. It has mastered the key core technologies developed by the world's mixed-flow hydropower units and has a foothold in China. Developed the capabilities and conditions of a 700,000 kW giant hydropower unit.
Since 2000, a tough battle on the right-hand crew has started. The Harbin Electric Man has made a great effort to form a team of hundreds of experts and a large number of young engineers and technicians to start the research. After hundreds of simulations of real machine tests on the high head test rig, the special unstable vibration of the left bank unit was successfully solved. With the problem, the world has taken the lead in developing a Francis turbine runner that has no special regional pressure pulsation to adapt to the Three Gorges right bank power station, and its excellent hydraulic performance has reached the international leading level.
The "L" type blade independently developed by Harbin Electric makes the technical performance of the runner superior to the performance of the foreign unit on the left bank. In terms of improving the hydraulic stability of the turbine of the Three Gorges Power Station, it has achieved a major breakthrough that has been plaguing the domestic and international hydropower industry. The self-developed Three Gorges right bank runner model has better overall performance than the left bank introduction unit, eliminating the phenomenon of “pressure pulsationâ€.
On December 25, 2003, four Chinese and foreign bidders tested the stability test, high efficiency, cavitation coefficient, critical cavitation coefficient, and anti-fatigue of the runner after three months of comparison test with the model test device. The performance exceeded the left bank unit, which not only met the requirements of the tender, but also surpassed the “foreign†teacher model, and enabled Harbin Motor to finally win the historic contract of designing and manufacturing four 700,000 kW hydropower units on the right bank of the Three Gorges. . Winning 4 units in one fell swoop.
A batch of new products with independent intellectual property rights were successfully developed by Harbin Electric. In the mixed flow unit products, following the Three Gorges right bank mixed flow unit, Harbin Electric has won orders for a large number of giant hydroelectric generating units such as Longtan, Xiaowan, Laxiwa, Goupitan and Jinping I. For a long time, the monopoly position of foreign companies in the high-end hydroelectric generating unit market of 500,000 to 700,000 kilowatts has promoted the localization of giant hydropower units and laid a solid technical foundation for the domesticization of a large number of large-scale units to be started in China. .
Led therapy bulb with E27/E26 socket, Red Light Infrared works for full body, we have 12w 24w 36w bulb, with 660nm and 850nm wavelength, customized led also ok.
The most convenient red light therapy solution
- E27 therapy bulb Suitable to use on any part of the body.
- Anything in the first couple of inches of skin can be affected by this light, making it suitable for; hair health, general skin tone/beauty, acne, eczema, wounds, bruises, sunburn, joint pain, wrinkle prevention, and much more.
Therapy light, led therapy lamp, light therapy lamp, lamps for light therapy, therapy light lamp
Shenzhen Wenyi Lighting Technology Co., Ltd , https://www.szwenyigrow.com