The Design For The Cavitation Monitoring System On The Water Turbine

Cavitation corrosion, refers to the existence of liquid around the bubble rupture at the time of its solid corrosion. Hydraulic turbine leaves, water pumps leaves ship propeller propulsion, and space will be lost by the destruction. My hydraulic turbine normally used for 1-2 years must park to overhaul once. Some pumps used for 1000 hours, the ship propeller in the use of time is also greatly reduced because of the efficiency of air piping. Cavitation as the main form of the destruction of hydraulic turbine leaves one great threat to the security of hydraulic turbine group.However, it is impossible to obverse the whole size turbine directly by naked eyes. So it is necessary to build a monitoring system for the cavation of turbine.With this system,we can monitor the degree of the cavitation on-line,once the degree of the cavitation is enough serious,inform the worker to change the working condition of the turbine to make it work in the safe condition in which the degree of the turbine is admitted.The production of this subject will make great significance for monitoring the degree of the cavitation of the turbine so as to increase economic benefit.Cavitation is more popular, and it is obvious for the influence of the engineering, and with the development of the country economy,the problem of the cavitation will be more complicated. But unto the present day, the theory about the cavitation and lots of producations are still not satisfated.,most of the theories are at the guessing and supposing phase, many problems are waited for research deeply. At the present day, the foreigh researches on the similar fields are not many, the adult producations are also few. The foreign researchers invented some adultery monitoring technologies,for example, ultrasonic detection , optics detection.Both of the two methods are direct and clear, and have certain applicatable value.But because of the constructure problem of the turbine,in many conditions,the equipment of the signal generating, transmitting and receiving are...