CENTRIFUGAL PUMP WITH GOVERNOR ACTUATED SEAL

摘要

The present invention relates to centrifugal pumps, and more specifically to a centrifugal pump device with a governor actuated cartridge seal and a method of attaching a centrifugal pump device with a governor actuated cartridge seal. The centrifugal pump comprises a sealing system that prevents undesirable fluid leaking or air ingestion when in operation while allowing ease of installation and maintenance. The governor actuated cartridge seal automatically increases sealing capabilities by urging a movable seal as a function of impeller or engine drive shaft rotational speed. The governors actuate radially so as to present a minimal profile and therefore not introduce a safety hazard. Scalable weights attached to the governors allow predictable calibration and initialization of the pump under varying hydraulic pressures and rotational speeds.

主权项

1. A centrifugal pump cartridge seal device, comprising:
a cylindrical shaft sleeve having a distal end, a proximal end, an exterior, and an interior, the cylindrical shaft sleeve adapted to axially interconnect to a pump drive shaft; a plurality of governors positioned about the exterior of the proximal end of the cylindrical shaft sleeve, each governor configured to extend outwardly in a substantially common plane with drive shaft rotation; a movable seal with a distal end and a proximal end, the proximal end of the movable seal operatively associated with a respective surface of each governor, the distal end of the movable seal positioned distally of each respective governor and radially outward of the cylindrical shaft sleeve and providing a first and second sealing surface; wherein when the drive shaft is at rest the movable seal is at a first position and the first sealing surface creates a fluid seal with respect to the fluid pressure, and wherein when the drive shaft is at a rotational speed each plurality of governors extend to displace the movable seal to a second position and the second sealing surface creates a fluid seal.