Internal Gear Pump

摘要

An internal gear pump with a field replaceable idler is disclosed that may be used for sanitary applications. Access to the idler mainly merely requires removal of the head. Access to the seal assembly disposed at the inboard end of the pump chamber is also fast and easy as removal of the head exposes a fastener that secures the rotor to the drive shaft. Removal of this fastener enables the rotor to be removed with a standard rotor-pulling tool thereby exposing the pump chamber seal assembly, which may be cleaned, serviced or replaced as needed.

主权项

1. A pump comprising:
a bracket including an inboard end, an outboard end and a through hole extending between the inboard and outboard ends; the outboard end of the bracket being coupled to an inboard end of a case, the inboard end of the case including an opening, the case further including an open outboard end that is covered by and coupled to a head, the case and head defining a pump chamber, the inboard end of the case further including an annular recess that surrounds the opening and that receives a seal assembly; a shaft including an inboard end and an outboard end, the shaft passing through the through hole of the bracket, the outboard end of the shaft passing through the seal assembly and the inboard end of the case before being detachably coupled to a rotor, the rotor being received in the pump chamber; the head being sealably and detachably coupled to a dowel, the dowel being coaxially received in an idler that is disposed in the pump chamber; whereby removal of the head and rotor providing access to the seal assembly through the open outboard end of the case and removal of the head and dowel providing access to the idler.