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