Positive Displacement Pump Including Detectable Composite Non-Metallic Components

摘要

A positive displacement pump is disclosed which includes a case that defines a pump cavity. A shaft and rotor, which are detachably connected together, are also included wherein the rotor is disposed within the pump cavity and the shaft passes through an opening in the proximal end of the case. The distal end of the shaft, in addition to being connected to the rotor, is also coupled to a fastener that couples a cover plate over the distal end of the shaft and over at least part of the base portion of the rotor. The opening in the proximal side of the case through which the shaft passes also accommodates a seal assembly. Access to the seal assembly is easily made by removing the head from the case and removing the rotor from the shaft. The seal assembly can be changed or serviced without removal of the shaft.

主权项

1. A positive displacement pump comprising:
a case including a proximal end with an opening and an open distal end that is detachably covered by a head; a rotor including a base, the base including a proximal side, a distal side and an opening; a shaft including a proximal end and a distal end that extends through the opening in the proximal end of the case before being coupled to the opening in the base of the rotor, the distal end of the shaft being coupled to the base of the rotor by a fastener, the fastener sealably coupling a cover plate to the distal end of the shaft, the cover plate extending radially outward from the shaft and sealably covering at least part of distal side of the base of the rotor; the opening in the proximal end of the case accommodating a seal assembly, the distal end of the shaft passing through the seal assembly, the seal assembly sealably engaging the opening in the proximal end of the case, the shaft and the proximal side of the base of the rotor.