Rotary piston pump with slip ring seals for improved fitting and synchronization of rotary pistons

摘要

A rotary piston pump with at least two double- or multi-lobe rotary pistons rotating in opposite directions, the drive shafts whereof include seals, wherein the seals are constituted as slip ring seals or lip seals or stuffing-box seals, which in each case are disposed on the shaft shoulder belonging to the respective rotary piston, and one slip ring per seal is provided with a locking device, which includes a large number of fixing positions. The seals are pushed onto a tubular shoulder of the rotary piston, the rotary piston is introduced into the pump housing, the securing element is connected to the slip ring seal in a form-fit manner by rotation of the rotary piston and the shaft shoulder is then rigidly connected to the drive shaft.

主权项

1. A rotary piston pump, comprising:
at least two double- or multi-lobe rotary pistons rotatable in opposite directions, drive shafts whereof having respective seals disposed in each case on a shaft shoulder of the respective rotary piston, wherein each seal is provided with a housing and a locking device, the locking device is a ring that is configured to be connected to the housing of the seal, and the ring includes a plurality of axial grooves running parallel to an axis of the respective rotary piston.