Manitoba Hydro, GDD (issued for fabrication)
Proximity Probe Bracket (Fabrication)
A welded A36 steel bracket that secures a vibration proximity probe to the generator guide bearing of a hydro generator unit.
Proximity Probe Bracket (Fabrication)
1-00194-DD-60060-0004, Rev 00
Material
ASTM A36 steel
Assembly weight
~17 lb
Source
Manitoba Hydro, GDD (issued for fabrication)
ASTM A36 steel
Material
~17 lb
Assembly weight
±1/16 in
Fraction tolerance
CSA W59 / W47.1
Welding
1-00194-DD-60060-0004
Drawing no.
Overview
A fabrication drawing for the generator guide bearing proximity probe bracket at Long Spruce Generating Station, drawn in Autodesk Inventor. The bracket holds a vibration proximity probe at a fixed position on the lower bracket of the generator unit.
Bill of Materials
| Item | Qty | Description |
|---|---|---|
| 1 | 1 | Plate, 1/2 in thick, steel ASTM A36 |
| 2 | 1 | 4x4 HSS, 1/4 in thick, steel ASTM A36 |
| 3 | 1 | Plate, 1/4 in thick, steel ASTM A36 |
| 4 | 2 | Hex bolt, 1/2-13 UNC x 1 1/2 long, grade 5 (ASME B18.2.1) |
Function
The bracket fixes a vibration (proximity) probe to the generator guide bearing lower bracket of a hydro generator unit. It holds the probe rigidly at a set position so the gap between the probe and the rotating shaft stays within the measurement range.
Construction
The bracket is a welded steel assembly: a 1/2 in base plate and a 4x4 in, 1/4 in wall HSS section, with a 1/4 in plate, all ASTM A36. Two 1/2-13 UNC grade 5 hex bolts fasten it in place. The drawing scope is to fabricate the plate and HSS items, supply the bolts, and weld the base plate to the HSS. Approximate assembly weight is 17 lb.
Specifications & Standards
Welding is specified to CSA W59 by a Canadian Welding Bureau shop certified to CSA W47.1, with 100 percent visual inspection and repair by grinding and re-welding. Surfaces are cleaned to SSPC SP-2/SP-3 and SP-1, then coated to a minimum 10 mil total thickness in grey RAL 7042. Fraction tolerance is ±1/16 in with a 125 surface finish. The sheet was issued for fabrication and references the installation drawing 1-00194-DE-60060-0001.
Drawing Sheet
The full vector drawing with title block, views, and dimensions. Open in a new tab or download the PDF.
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Proximity Probe Bracket (Installation)