DEVELOPMENT OF PROTOTYPE PUMP USING A VIBRATING PIPE WITH A VALVE

Tests were conducted on a prototype pump which has an extremely simple structure and excellent controllability. Its structural and hydrodyna mic features are different from those of previous conventional recipro cating pumps. The pump structure constitutes a leak-proof short vibrat ing pipe equipped with a nonreturn value on the edge of its outlet. Th e authors developed a prototype pump which uses a 25 mm diameter vibra tion pipe and an electromagnetic excitation device. The pump performan ce, intentionally changed by adjusting the coil voltage or the coil cu rrent frequency, featured a maximum pressure of approximately 1.0 bars , a maximum flow rate of approximately 40 liters per minute, and a max imum efficiency of approximately 30 percent. Results of both a one-yea r test run, using water as the working medium, and a three-month durab ility test, using concentrated nitric acid as the working fluid, assum ing application as a chemical pump, indicated favorable results.