The longest full-speed steam turbine in China has been successfully developed for the final blades of 1450mm titanium alloy

On August 6, Oriental Electric Group organized experts in Deyang, Sichuan to conduct acceptance and review of the "Development of 1450mm Titanium Alloy Final Blades of Full Speed Steam Turbine" project completed by Oriental Turbine Co., Ltd. Members of the expert group composed of representatives of the owner and industry experts listened carefully to the development summary report and the dynamic frequency test summary report, reviewed the relevant information, and witnessed the blade dynamic frequency test on the spot. The expert group unanimously agreed to pass the acceptance review.

The 1450mm titanium alloy final blades of the full-speed turbine use advanced design and manufacturing technologies such as high-efficiency supersonic leaf type, large-loaded fir tree leaf root, variable gap-forming ring damping surround, double-material composite shot peening strengthening, large-flexible titanium alloy blade processing deformation control, and other advanced blades, with the overall performance reaching the international advanced level.

The overall performance of the 1450mm titanium alloy final blade of the full-speed turbine has reached the international advanced level, filling the gap in the domestic manufacturing industry. This blade applies for a number of invention patents and will be applied to two national demonstration projects: ZTE Penglai 620℃ ultra-supercritical million second reheat and Datang Yuncheng 630℃ ultra-supercritical million second reheat.

Full speed turbine 1450mm titanium alloy final blade enters high-speed dynamic balance test

In 2011, in order to improve the last-stage blade series of Oriental Turbine and enhance the market competitiveness of the product, under the guidance of the group company and the company's leaders, Zhou Xianding, blade expert and senior chief engineer, led Fan Zhifei, Jin Yafeng, Pu Shouwu, Gou Xiaoping and other team members to start a six-year research and development and design work. With the joint efforts of the blade branch, materials research center, surface engineering department, quality inspection department and other departments, after arduous efforts, we finally successfully developed the longest fully-turn 1450mm titanium alloy final blade in China, and achieved successful assembly and successful dynamic frequency regulation test! The blade has the characteristics of excellent aerodynamic performance and high safety and reliability. It solves many technical problems and challenges such as pneumatic, strength vibration, manufacturing deformation, blade surface integrity, and assembly, and has independent intellectual property rights.

1450mm titanium alloy final blade R&D team for full speed turbine

Technological innovation is the lifeblood of an enterprise. As a state-owned enterprise, Oriental Turbine must strengthen independent innovation in order to produce products with core competitiveness and be invincible in the fierce competition. The successful development of the last-stage blade of titanium alloy with full speed of 1450mm marks that my country has solved the problem of "bottleneck" of a key technology for blade development, greatly improving the R&D and manufacturing innovation capabilities of the ultra-long final-stage blade of Oriental Turbine, and is of great significance to Oriental Electric's innovation leading high-quality development.