Recently, Chinese related units have successfully developed a complex shaped hole laser processing system for aero-engine turbine blades, which marks that the domestic aviation engine has overcome a difficult problem and laid a solid foundation for mass production of the WS-15 engine.
Turbine blade complex shaped holes are mainly used for aero-engine air film cooling, which can effectively reduce the fuel chamber, high pressure turbine operating temperature and improve engine performance.
The internal space of the aero-engine hot end parts is small, and it is very difficult to machine the shaped holes in such a small space. There are five-axis coordinate linkage conversion, auto focus and compensation, normal automatic detection and inclination control, CAD-driven multi-station automatic processing, etc. Many technical difficulties. Due to the domestic economic and technological level and industrial base restrictions, domestic aviation engines have not been able to overcome this difficulty for a long time, resulting in lower cooling efficiency of hot-end components, which in turn limits the engine front turbine temperature, thereby reducing engine thrust and reliability.
After continuous efforts, the relevant units finally overcome this technical difficulty, indicating that China's aviation engine thrust and reliability will have a substantial increase.
On July 27th, Hangzhou held the first press conference for the laser pointer coverage theater in the country. At the meeting, Xu Tianfu, vice president of Hengdian Group and chairman of Hengdian Film and Television, said that Hengdian Film and Television Academy became the first full laser coverage theater in China and even the world. .
The laser film projector uses red, green and blue primary light as the light source. The laser has a narrow spectral bandwidth and is a true high-purity red, green and blue primary light source. The laser projector can realize more than 90% of human eye recognition in nature. The color is more than twice that of the traditional projection. Based on this, the laser light source has higher color gray scale performance ability, and the image layering is strong, which greatly enhances the 3D stereo effect; at the same time, in terms of service life, the laser light source has long life, low attenuation, and can work continuously for a long time, and Long-term replacement is not required, the life is more than 20,000 hours, while the high-power xenon lamp life is only 500 hours, which is 1/40 of the laser.
At present, Hengdian Film and Television has basically completed the comprehensive upgrade of its theater laser pointer screening, becoming the country's first full laser coverage theater. Xu Tianfu said that in the face of the laser boom in the global film screening market, the first cooperation between Hengdian Film and Zhongying Guangfeng will surely play a leading role in promoting the comprehensive upgrade of Chinese cinema hardware facilities and projection technology.