MATHEMATICAL MODELING OF AN ELECTROHYDRAULIC DRIVE FOR A HYDRAULIC TURBINE

The results of a systematic study of two mathematical models of a multi-actuator electro-hydraulic drive designed for a ring gate of hydraulic turbine movement are presented in the work. We have investigated the main factors which have a negative impact on the synchronization of the servo cylinder movement, such as the load capacity, the external forces – additionally applied to the servo cylinders, and the manufacturing error of hydraulic cylinder pistons. Functional dependences of the synchronization error from these factors have been obtained. These dependences allow to develop reasonable recommendations for selecting the main parameters of the hydraulic drive and determine the operation regularities of this drive.