Failure Analysis and Redesign of Some Import Motor-Driven Devices of Valve

Combining with the failure analysis of a class of import motor-driven devices of valve and the design of new kinds, several problems worth noticing in the design of motor-driven devices of valve have been discussed. These are the failure analysis and the redesign of changeover mechanism between manual operating and motor driving, the redesign of the setting way for valve opening, the reform of the measurement of transmission way for valve opening, and the selections of the parameters about velocity and force of the device. Based on these analyses, redesigned motor-driven devices of valve have been successfully applied in industry. The conclusions obtained have certain referential values to related research.