| 摘要 |
A rotary, positive displacement progressing cavity pump comprising a stator (4), a rotor (5) within the stator, an inlet and outlet in the stator and a drive shaft (6) connected to the rotor, the drive shaft-to-rotor connection (12,13) comprising a heat-sensitive, breakaway bond (14) of a heat-fusible metal alloy in an amount to provide a metchanical linkage between the drive shaft and the rotor, the metal alloy being meltable upon the generation of heat within the pump cavity and so disconnect the mechanical linkage. |
