Research Article
On the Instability Threshold of Journal Bearing Supported Rotors
Table 1
Details concerning both test rig configurations.
| | Shaft material | Steel SAE 1030 | | Shaft diameter | 12 mm | | Shaft length | 800 mm (A)–820 mm (B) | | Disc material | Steel SAE 1020 | | Disc diameter | 95 mm | | Disc width | 47.5 mm | | Shaft journal material | Steel SAE 1020 | | Shaft journal diameter | 40 mm | | Shaft journal width | 80 mm | | Coupling coefficients | e5 N/m and
N/m | | Ball bearing coefficients | e10 N/m and
N/m | | Journal bearings radial clearance | 90 µm | | Journal bearings diameter | 30 mm | | Journal bearings width | 20 mm | | Lubricant | ISO VG 32 oil |
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