Importance

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Abstract

The present invention relates to a method for optimizing the adjustment of the gating of a hydraulic turbine (1), the turbine (1) is provided with a set of wicket gates (2), wicket gates (2) are moving with a single, conjoined movement between a closing position in which they press against one another and an opening position in which they are apart from one another, by a control ring (4) that is kinematically connected to each one of these wicket gates (2), this control ring (4) being moved in rotation by at least one actuator (3), this actuator (3) including a device (31) for adjusting the travel of its rod (30), the method includes at least the following steps, the turbine (1) is previously stopped and dry and the rod (30) of the actuator (3) is provided with at least one strain gauge: 1) calculating the theoretical force to be applied to the actuator (3) in order to obtain watertight closure of the wicket gates (2); 2) measuring, via the strain gauge, the force applied to the actuator (3), the latter being inoperative; 3) after bringing the actuator (3) online, moving its rod (30) until the wicket gates (2) adopt the closing position and measuring the corresponding force, referred to as the “measured force”; 4) comparing the measured force with the theoretical force calculated in step 1.

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First Claim