US 12,241,820 B2
Viscometer and a method for determining a concentration of a component in a fluid using such a viscometer
Daniel Steinert, Bülach (CH); and Thomas Nussbaumer, Zürich (CH)
Assigned to Levitronix GmbH, Zurich (CH)
Filed by Levitronix GmbH, Zürich (CH)
Filed on Jun. 30, 2022, as Appl. No. 17/855,404.
Claims priority of application No. 21188210 (EP), filed on Jul. 28, 2021.
Prior Publication US 2023/0031535 A1, Feb. 2, 2023
Int. Cl. G01N 11/14 (2006.01); G01N 33/487 (2006.01); H02K 1/14 (2006.01); H02K 3/18 (2006.01)
CPC G01N 11/14 (2013.01) [G01N 33/487 (2013.01); H02K 1/14 (2013.01); H02K 3/18 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A viscometer for inline determination of the viscosity of a fluid, comprising:
a drive device;
a measuring device comprising a measuring housing with an inlet and with an outlet for the fluid, and a measuring chamber in which a rotor having a ring-shaped or disk-shaped magnetically effective core is provided, the drive device comprising a drive housing in which a stator is arranged, the stator cooperating with the rotor as an electromagnetic rotary drive, has and having a plurality of coil cores, each coil core being delimited by an end face, and carrying a concentrated winding, the stator being a bearing and drive stator with which the rotor is magnetically driven without contact about an axial direction and magnetically levitated without contact with respect to the stator during operation; and
a control device configured to actuate the stator and determine the viscosity based on an operating parameter of the electromagnetic rotary drive disposed in the drive housing,
the measuring device is designed to be inserted into the drive device such that the end faces of the coil cores are arranged around the magnetically effective core of the rotor, and the measuring housing configured to be detachably connected to the drive housing so that the measuring housing and the drive housing are fixable relative to each other and separable from each other.