Couplings are applied to all kinds of complete sets of equipment in national economy

Coupling is a coupling between power and load, widely used in all kinds of complete sets of equipment in the national economy. But because the coupling is a complete set of equipment in the "small supporting role", little attention. China's existing coupling manufacturers up to more than a hundred, but most stay in the endless imitation of foreign old, low-end coupling products. So far, there is no flagship enterprise with independent intellectual property rights, independent research and development, large-scale production and sales of innovative couplings at home and abroad, so that 90% of the advanced coupling products adopted by the domestic top 500 enterprises rely on imports. In the 1990s, several retired researchers and senior engineers engaged in high-speed transmission engineering and aero-engine design and research began the long march of flexible coupling, an important fundamental part of mechanical engineering. Lifetime engaged in aviation high-speed transmission engineering research of aeroengine designer brahman is the project leader of yellow day, after he has retired after more than ten years studying, won five elastic/flexible coupling patent authorization, formed, including elastic coupling, flexible coupling, six flexible/elastic coupling series of independent innovation. But funding is hard to come by, and it has never been able to turn patent results into tangible products.

In June 2009, it was found that the auxiliary coupling had been partially damaged when the unit was stopped for inspection. The unit had been running for 6 500 h and had been started for 570 times since it was put into operation until the fault of the auxiliary coupling was found. This paper describes the fault phenomenon and diagnosis process of the gas turbine auxiliary coupling in operation, analyzes the cause of the fault, and puts forward the key technical measures to solve the problem. Initial check 1 failure of judgment in March 2001, the gas turbine bearing vibration level 1 to 3 mm/s (before the no. 1 bearing vibration is basically around 3 mm/s), April 1, bearing vibration increased gradually to 4 mm/s, and in May, no. 1 bearing vibration gradually increased to 6 mm/s, and in a critical, Sometimes the vibration reaches 10 mm/s, and the vibration gradually develops and increases.