Open Access
Table 1
Dimensions of variable-pitch screw vacuum pump.
| Design parameter | Dimension |
|---|---|
| Addendum circle diameter | 148 mm |
| Root circle diameter | 62 mm |
| Pitch circle diameter | 52.5 mm |
| Rotor length | 398 mm |
| Distance between two axis | 105 mm |
| Exhaust end pitch | 56 mm |
| Suction end pitch | 101 mm |
| The number of turns | 5.5 |
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