Desempenho de um carneiro hidraulico de 1” construído em aço galvanizado atuando com uma e duas válvulas de impulso

Abstract

The hydraulic ram is an equipment that makes use of the phenomenon known as water hammer to raise water to huge distances, both vertical and horizontal, using only the potential and kinetic energy from liquid displacement, of an incial geometrical slope, without use another source of energy. In this work, a ram pump was built using pipes and parts made of galvanized steel, with diameter of 1 in, aiming performance comparison between two configurations. Were done field trials to obtain the results, testing two adduction slopes (4,8 m and 4 m), plus eight entry flow rates. The greatest manometric height obtained was 19,74 m, with discharge flow rate of 181,75 L/h, using two impulse valves, initial slope of 4,8 m, maximum entry flow rate, beat frequency of 68/min and efficiency of 37,16%. Was noted a visible decrease in generated manometric height, with the entry flow rate reduction. In general, the addition of another waste valve create an increase in the manometric height (1,55 m in the most expressive case, with 0,59 m average to a slope of 4,8 m and 0,83 m average to a slope of 4 m), followed by a increase in the efficiency (3,81% in the most expressive case with 1,62% average to a slope of 4,8 m and 5,27% in the most expressive case with 2,84% average to a slope of 4 m). In conclusion, the hydraulic ram that was made, function with sucess in most configuration that it was submited, getting better results in situations with higher geometrical slope and entry flow rate, besides from having great potential of discharge heights still not explored. Keywords: Hydraulics; Hydraulic Ram; Galvanized Steel.