Sterling Fluid Systems (germany) Gmbh

Sterling Fluid Systems and Gmbh

Heiner K&ouml;sters

Guido Keller

Christian Dahmlos

A displacement machine for compressible media includes at least two shafts. Each of the shafts has a rotor which is configured as a profiled body with the profiles of the rotors engaging one another in the manner of gearwheels during rotation and running without contact relative to one another. Each of the shafts is driven by an electric motor. The angular positions of each shaft is determined by an associated synchro resolver. Each of the synchro resolvers has a rotor and emits an electronic signal to the electric motor of the shaft such that the motors are electronically synchronized. Each of the shafts further has a gearwheel, with the gearwheels engaging one another and having an angular clearance which is smaller than that of the profiled bodies. At least one of the gearwheels is directly connected to the rotor of the synchro resolver associated with its shaft and both gearwheels together are releasably connected as a unit to the shaft.

Displacement machine for compressible media

A displacement machine for compressible media has at least two shafts with rotors which are designed as helical profile bodies. During rotation, the profiles intermesh like gears and run free of contact relative to one another. The lead of the helical profile bodies decreases from the inlet end to the outlet end and have a double-start design, with the leads at the inlet end and outlet end of the helical profile bodies being constant, and the intermediate lead decreasing continuously from the larger lead at the inlet end to the smaller lead at the outlet end.

The rotary piston machine with an axial direction of delivery from the top downwards, in particular of screw spindle-type construction, with cooling ducts (,) for the motors (,), bearings (,) and sensors (,), through which ducts a cooling fluid flows, and with a cooling device for the pump space (,) is characterized in that the casing (,) of the pump space (,) has a closed annular space (,) which is partially filled with a liquid, which is cooled by the cooling fluid via heat exchanger surfaces (,).

Rotary piston compressor with an axial direction of delivery

Screw-spindle vacuum pump with at least three closed-off feed chambers located one behind the other along each rotor and method for operating this compressor. The chamber which is last on the delivery side is brought virtually to the compression limit pressure by means of pre-admission, shortly before it opens towards the delivery side, by supplying a pre-admission stream which is at least five times as great as the intake mass stream. A precondition, in this case, is a minimum ratio of external compression to internal compression of five.

Growing community of inventors

Itzehoe, Germany

Heiner Kösters

Growing community of inventors

Itzehoe, Germany

Heiner K&ouml;sters

Heiner Kösters