| 摘要 |
<p>The present invention provides a Progressive Cavity Pump (20) having an adjustable rotor (26) and/or stator (22), so that the interference fit and/or clearance can be adjusted. The rotor and/or stator are tapered to provide a difference in fit between the rotor and stator by longitudinal adjustment of their relative position. The relative longitudinal adjustment is achieved in response to a change in temperature and is matched to the taper angle of the stator/rotor to maintain a desired interference fit.</p> |
