Page 261 - Water Standards
P. 261

meet the design requirements. If there is no requirement, the gap should not be
                   less than 5mm  
           4   2   10  Installation of shaft extension tubular turbine generators shall meet the following re⁃
           quirements:
               1   Allowable combination error of the main parts shall meet the requirements of
           Table 4   2   10  
                  Table 4   2   10  Allowable combination error of main parts
                                                             Unit: mm

             No            Item                   Allowable error
                                           No gap when cushioned; radial misalign⁃
                    Overall joint gap between the
             1                           ment at the bottom of the iron core slot shall
                 stator and iron core
                                         be no larger than 0   3
                    Overall joint gap between the    No larger than 0   10 in local parts; no
             2
                 stator and unit base    larger than 0   05 around the bolts
                    Circularity  of  the  stator  s
             3                             ±4% of the design air gap
                 iron core
                   Circularity of the main case and    ± 0   1% of the design diameter and the
             4
                 top cowl flanges        maximum value shall be no larger than 5   0

                                           Meet the requirements of Item 10 of Article
             5     Top cowl  s overall joint gap
                                         4   2   2 in this specification
               2  The generator final assembly shall meet the following require⁃
           ments:
                  1) Bearing assembly shall meet the requirements of Table
                      4   2   9-1.
                  2) After the main shaft is coupled, each part  s throw shall be
                     checked by the barring gear and shall meet the following
                     requirements. Each shaft neck  s throw shall be less than
                     0   03mm. The jumping value of the mirror plate  s end face
                     shall be no larger than 0   05mm. The shaft coupling flange
                     throw shall be no larger than 0   10mm. The slip ring  s
             2 5 4
   256   257   258   259   260   261   262   263   264   265   266