WEDGE MAPPING
WEDGE
MAPPING
Stator Wedge Tapping Stator Wedge Tapping can be used to check the wedge tightness without the rotor being pulled out. The tapping mechanism of GenSPIDER® consists of three components: a hammer which vibrates the stator wedge, a motor which drives the hammer, and an accelerometer which detects vibrations on the stator wedges. GenSPIDER® is also equipped with a cam mechanism. Installing the cam driving motor axially on GenSPIDER®’s body results in a thinner body and assurance of sufficient vibration torque. As a result, GenSPIDER® is currently applied to many kinds of generators, providing accurate measurement of stator wedge tightness. A wedge tapping schematic is shown in Figure 4. Traditionally, inspections of degrees of looseness in stator wedges have been conducted by engineers who then judged the results quantitatively. However, GenSPIDER® quantifies the looseness as numerical data. Accumulating inspection results and analyzing trends enable customers to evaluate the condition of components in stator core slots. From these results, the number of required spare wedges can be prepared in advance of the next outage. Results of a stator wedge tapping inspection are shown in Figure .
|
SLOT NO |
WEDGE
NO |
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|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
|
|
1 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
2 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
PL |
T |
T |
T |
|
3 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
4 |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
PL |
T |
T |
PL |
T |
|
5 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
6 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
7 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
|
8 |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
T |
T |
|
9 |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
T |
T |
T |
|
10 |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
T |
T |
T |
|
11 |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
PL |
T |
T |
PL |
T |
|
12 |
T |
PL |
T |
T |
T |
T |
T |
T |
PL |
T |
L |
PL |
T |
T |
|
13 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
|
14 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
15 |
T |
T |
T |
PL |
T |
T |
T |
T |
L |
T |
T |
T |
T |
T |
|
16 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
17 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
|
18 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
|
19 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
20 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
21 |
T |
PL |
PL |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
22 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
|
23 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
24 |
T |
PL |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
|
25 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
26 |
T |
PL |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
27 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
28 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
29 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
30 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
|
31 |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
T |
|
32 |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
T |
|
33 |
T |
PL |
T |
PL |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
34 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
35 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
36 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
|
37 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
38 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
39 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
PL |
T |
T |
T |
T |
|
40 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
41 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
42 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
43 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
44 |
T |
T |
PL |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
45 |
T |
T |
T |
T |
T |
PL |
PL |
T |
T |
T |
T |
T |
T |
T |
|
46 |
T |
T |
PL |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
47 |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
T |
|
48 |
T |
T |
T |
T |
PL |
PL |
T |
T |
T |
T |
T |
T |
T |
T |
|
*
Slot number 1 marked at 6 O'clock position and progressed in clockwise
direction viewing from NDE. Wedge no. 1 taken from NDE. |
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|
*
T-Tight, PL-Partialy Loose, L-Loose |
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Certificate No.CERT001561786-EMI
🥇BE-Electrical🥈 PGDM-Marketing. 🥉Data Scientists. 🏅MEP-Electrical.
This Page is a little effort to make you Sharing of some own materials .This is just a Kick-Start to make the aware of Practical World !!! Best of luck.-DHRUVANG SUTHAR
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