Device for adjusting water flow and water turbine machine using the same

A water turbine machine, comprising:

• a water wheel, arranged inside a housing, the water wheel has an axial shaft arranged along a first axial direction, whereby the water wheel rotates about the first axial direction;
• a nozzle flow channel, having an inlet and a nozzle outlet corresponding to a part of the water wheel;
• and
• an adjusting device, arranged at a side of the nozzle flow channel, for adjusting an opening dimension of the nozzle outlet, the adjusting device further comprising:
• a pivoting part, having a first side coupled to a first rotating element through which the pivoting part rotates about the first axial direction for adjusting the opening dimension of the nozzle outlet;
• a following part, having a third side rotatably coupled to a second side of the pivoting part, and a second rotating element arranged at a fourth side of the following part, wherein the second rotating element further moves along a second axial direction perpendicular to the first axial direction when the pivoting part changes the opening dimension of the nozzle outlet;
• and
• a driving unit, utilized to generate a driving force for rotating the pivoting part.