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Rotary rheometer

A rotational rheometer, rotation invariant technology, applied in the field of rotational rheometer, can solve problems such as difficult detection, torsion angle cannot be detected, etc.

Inactive Publication Date: 2016-08-17
安东帕有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A strong magnetic field also leads to an almost rigid coupling between the rotor and the driving magnetic field and to an inclination of the magnetic field to the rotor at any small torsional angle between the rotor and the stator which is adjusted during the test and which is influenced by the magnetic field. Same rotational speed, however, the angle of rotation cannot be detected or can only be detected with great difficulty

Method used

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Embodiment Construction

[0043] The rotational rheometer according to the invention very generally has a fixed, external or internal, preferably rotationally symmetrical body that functions as the stator 2, which can also be configured as a closed container, wherein a rotationally symmetrical design is preferred The measuring body is arranged as a rotor 1 in the container concentrically with the outer and / or inner stator 2 . There is a measuring gap 15 between the rotor 1 and the stator 2 , and a hydrodynamic bearing between the stator 2 and the rotor 1 is formed in the measuring gap 15 during the rotation of the rotor 1 . Deviations from the concentric position caused by the weight of the rotor 2 can in principle occur in the case of the rheometer according to the invention, but have no influence during the measurement and can neglect.

[0044] In principle, the hydrodynamic mounting of the rotor 1 provided according to the invention takes place primarily in the radial direction with respect to its ...

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Abstract

The invention relates to a rotary rheometer having a stator (2) arranged in a rotationally invariant fashion, and having a rotor (1) that can be rotated about the axis of the stator (2) by means of an eddy current drive, wherein the test medium (6) to be examined can be introduced into at least one measuring gap (15) formed between surfaces of rotor (1) and stator (2) located opposite of one another. According to the invention, the measuring gap (15) filled with the test medium (6) to be examined functions as and / or is configured as a hydrodynamic bearing between rotor (1) and stator (2), and the distance and mutual position of the mutually facing surfaces of rotor (1) and stator (2) defining the measuring gap (15) are predetermined and set, and are maintained during the measuring process, exclusively by the hydrodynamic bearing action generated by the rotation of the rotor (1) relative to the stator (2).

Description

technical field [0001] The invention relates to a rotational rheometer according to the preamble of claim 1 for determining viscous and / or rheological properties of a fluid medium. Background technique [0002] Viscous and rheological properties and parameters of the fluid, in particular the dynamic viscosity of the fluid, can be ascertained with a rotational rheometer. [0003] In the rheometer according to the invention, the measuring body configured as a rotor runs around or in the stator or the stator part or relative to the stator or the stator part. The measuring gap is between rotor and stator. Eddy current drive (Wirbelstromantrieb) to the rotor. Furthermore, during the measurement, the rotational speed specified by the drive and the actual rotational speed of the rotor are measured and the rotational speed difference is used as a measure of the viscous / rheological properties of the test medium. According to the invention, a hydrodynamic mounting of the rotor rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/14
CPCG01N11/14
Inventor R.亨津格J.高特施
Owner 安东帕有限责任公司