Robert Boschgmbh

Evgenij Skrynski

Felix Arnold

Dieter Amesoeder

Ingo Immendoerfer

Marian Kacmar

Oliver Laforsch

Sando Kunath

Ingo Nowitzky

Martin Kling

Daniel Heneberg

Karel Muk

Pump units are known that have a drive shaft and a rotor, which is driven by the drive shaft and is arranged rotatably in a housing, the drive shaft having an oblique sliding plane, which interacts with the rotor and allows the rotor to nutate with the rotor axis thereof about a drive axis of the drive shaft, the rotor having a set of teeth on the end face of the rotor facing away from the drive shaft, said teeth meshing with a set of teeth formed on a housing of the pump unit, working spaces being formed between the teeth of the rotor and the teeth of the housing, which working spaces can be filled via an inlet and emptied via an outlet. It is disadvantageous that the pump unit has a comparatively large axial installation length, because the drive of the pump unit is arranged on an end of the drive shaft facing away from the rotor. In the pump unit according to the invention, the axial installation length is shortened. According to the invention the drive shaft () is surrounded by a stator () and magnets () are provided on the drive shaft (), which magnets interact magnetically with the stator ().

Pump unit

Pump units include a rotatably arranged rotor () that is driven by a drive shaft (), wherein the drive shaft () has a first bearing section () facing towards the rotor (), and a second bearing section () facing away from the rotor (). The first bearing section () is a first sliding bearing (), and the second bearing section () is a second sliding bearing (). The load-bearing capacity of the first sliding bearing () is limited by a predetermined working pressure in the pump unit. In the pump unit according to the invention, the load-bearing capacity of the sliding bearing () facing towards the rotor () is increased. According to the invention, the diameter of the first bearing section () of the drive shaft () and the first sliding bearing () is larger than the diameter of the second bearing section () and the second sliding bearing ().

Electric pump supported by journal bearings

A feed unit comprising a first toothing part () and a second toothing part () which interact with one another via a toothing system () and axes () of which are set obliquely with respect to one another, the first toothing part () engaging around the second toothing part () with a collar section (), and working spaces () being formed between the toothing system () of the first toothing part () and the toothing system () of the second toothing part (), which working spaces () are configured to be filled via an inflow () and are configured to be emptied via an outflow ().

Feed unit

A delivery unit is already known, which comprises a drive shaft and a rotor driven by the drive shaft. The rotor is rotatably arranged in a stator housing, wherein the rotor has a toothing on the end face of said rotor that is remote from the drive shaft, wherein said toothing meshes with a toothing constructed on the stator housing. The drive shaft comprises an oblique sliding plane interacting with the rotor and which is constructed on a shoulder of the drive shaft and allows the rotor to gyrate with the rotor axis thereof about the drive axis of the drive shaft. Work spaces are formed between the toothing of the rotor and the toothing of the stator housing, wherein said work spaces can be filled via an inlet and emptied via an outlet. In one embodiment the fluid is admitted axially and discharged radially, and in the other embodiment the fluid is admitted and discharged axially. For that purpose, control valves in the form of non-return valves are required. The non-return valves cause additional internal leakages, resulting in a reduction in the volumetric efficiency of the pump. The valves are additional parts, which are associated with additional costs and an increased risk of failure. In the delivery unit according to the invention the control valves can be dispensed with. According to the invention the inlet () is provided in a channel () of the drive shaft () and the outlet () is provided at the shoulder () of the drive shaft ().

Delivery unit

A pump or motor for fluid or gaseous media comprising a shaft (), which faces a working part () and has a common inclined sliding surface () with the same, whereby the working part () limiting the pump working spaces () wobbles in a positionally fixed housing ().

Growing community of inventors

Stuttgart, Germany

Evgenij Skrynski