Full-scale tests of the trash racks of the Kapchagai hydroelectric station

Abstract

the wedge removed for eliminating the jog of the turbine shaft is located in vertical section VII, and for eliminating the jog of the exciter shaft, in vertical section II--III. To eliminate nonperpendicularity of the bearing disk, the section with the maximum thickness of the wedge being removed is determined by the maximum value of the deviation of the line of the generator shaft from nonperpendicularity. For example (see Fig. 2), the maximum thickness of the wedge removed from the rear side of the disk to eliminate nonperpendicularity is located in section IV.Thus the graphic characteristics make it possible to assess the quantitative aspect of disturbance of centering and to determine the thickness of the wedge layer to be removed and the vertical section in which the thickness of the edge is maximum. After removing the wedge layer, control rotation of the rotor through 360 ~ with repeated determination of all parameters is carried out. Subsequent rotations of the rotor are not required if the values of the relative displacements Of the shaft caused by nonperpendicularity of the bearing disk and jog of the line of shafting in the flanges determined during the repeated rotation do not exceed the allowable. Then the slope of the line of shafting is determined and brought to the normal.