Improved Design And Manufacture Of Viking Pump

Citvle-short range out cycloidal equidistant (C-SROCE) inner gear pump, which the quantity of the inner gear tooth are not less 2 than that of another, (i.e. inner cycloidal gear pump),is a kind of srperior compelling feeding gear pump. It's now widly used in petrochemical industry. From 1995, Machinary Plant of Daqing petrochemical complex, began to study the series pumps and now can manufacture 13 deferent parts and 4 deferent style pumps. Running in ethyene apparatus for 3 years and experiment analyzing from several Institutes showed that the characteristics are not less than the international standards. In Oct. 2002, this new series pumps wereauthenticated imported-product domestic-made item by SINOPEC.The key parts of the inner out cycloidal gear pump are the pair of Circle-short range out cycloidal equidistant inner gears. This paper discussed not only the tooth profile Curve equation and it's characteristic parameters but also infer conjugated tooth curve transmission but also infer conjugated tooth curve transmission consecutiveness, its intensity conditions, E fomula of the tooth curve and the method how to optimize the tooth curve characteristic parameters. For the tooth curve is rather complex, it's very difficult to profille the tooth the theoretically and precisly In order to choose the reasonable profiling parameters, single circle profiling method is taken up. For this reason, We can get higher pricision tooth curve andit's easier to manufacture and mill the cutter or by the mean of simple methods to obtain higher pricision cycloidal gear to meet the needs.In order to test the characteristics of the pumps,, We design a special experiment testing platform to mensurate rate of flows tortions, rotatespeeds. Not only imported pumps but also domestic-made ones, seriouse in high density(over 3pa. s) leakage is a sore vroblem.So we changed the seal,anddesigned anti-screw non-contact seal. It's practical running on line over ten months.This paper discuss the whole course from mapping, design, manufacture, Test, till to put into use in petrochenical industry, for technical secret reasons some details are not printed.