TABLE OF CONTENTS Spoked bearing supports are used in gas turbines, large air-cooling fans, electric-motor casings slotted for air circulation, and a variety of other applications. For the shaft and 6-spoked bearing system in Fig. 1 having three rotor masses and these parameters and symbols,
| SI values | |||
|---|---|---|---|
| P | = | 10,000 lb (at either bearing) | (44,480 N) |
| Is | = | 25 in 4 | (1040.6 cm 4) |
| I R | = | 0.3 in 4 | (12.5 cm 4) |
| A | = | 7 in 2 (for ring also) | (45.2 cm 2) |
| E s | = | E R = 10 x 10" psi | (68,900 MPa) |
| L | = | 10 in | (25.4 cm) |
| R | = | 12 in | (30.5 cm) |
| C R | = | 0.40 in | (8.9 cm) |
| (1.02 cm) |
| Symbols | SI values |
|---|---|
| A = spoke cross-section area, in 2 | (cm 2) |
| C s = distance, neutral axis to extreme fiber (of spoke), in | (crn) |
| C R = distance, neutral axis to extreme fiber (of ring), in | (cm) |
| E R , E s = elasticity moduli (ring and spoke), psi | (kPa) |
| R RI = axial loading in inclined spokes, lb; (+ for upper two, ? for lower two) | (N) |
| F R2 = axial loading in vertical spokes, lb; (+ for top, ? for bottom) | (N) |
| F T =... |
