Flexible guide vane structure of mixed flow pump with adjustable flow area, mixed flow pump and adjustment method

A mixed flow pump with adjustable flow area having a flexible guide vane structure, comprising an impeller hub, an impeller, guide vanes, m flexible guide vanes, and a flexible guide vane adjusting device;

• the flexible guide vane adjusting device comprises m groups of support ribs, n support rib bases, n groups of motors, and a number of support ribs in each group is n, and one end of each support rib in the m groups of support ribs is fixedly installed on one of the support rib bases;
• each one of the flexible guide vanes are installed behind a suction surface of each guide vane;
• n strip-shaped annular grooves are arranged at a root of each guide vane, the strip-shaped annular grooves extend along a circumferential direction on a guide vane hub;
• each support rib base being annular and arranged and sleeved in a respective strip-shaped annular groove, each support rib having one end fixed on a respective support rib base and extending through one of the strip-shaped annular grooves;
• and
• at least one of the group of motors is installed in a gap in a respective support rib base,
• wherein m is a positive integer greater than 2 and n is a positive integer greater than 5;
• each flexible guide vane is fixedly installed on each group of support ribs, and each support rib base is driven by the at least one of the group of motors, so as to drive the support ribs to rotate;
• and each support rib base is driven by different motors to rotate the respective support rib base at a different angle from an adjacent support rib base, thus, a shape of the flexible guide vane is changed.