| 摘要 |
Apparatus for testing a resonance enhanced rotary drilling module. The rig comprises a resonance enhanced rotary drilling module with oscillator, a fixed frame, a movable frame for moving the rotary drilling in an axial direction relative to a sample and means for generating relative rotary motion between drilling module and sample. A torsion restraint unit reduces torsional loading on the vibrator. The torsional restraint may be a membrane torsion restraint unit. Load cells can be used to measure the axial and oscillatory loading. Closed loop real time control of the oscillator may be provided using a controller connected to load cells |
