Torque measuring device for a device measuring the flow of material
US6705171B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2001 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Aug 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a device for measuring the flow of material, especially of a flow of bulk material, according to the Coriolis principle of measurement. The device has an impeller (2) which is driven by a motor (9) with a constant r.p.m. The flow of material is fed to the impeller (2) and is radially deflected. The driving torque is measured by a torque measuring sensor. The driving torque is transmitted to a force sensor (22) by a pivot bearing (12) for determining the torque. The force-sensing element (22) has at least two horizontal leaf springs (16, 17) which cross each other and which are arranged in such a way that the crossing point of the leaf springs (16, 17) coincides with a rotational axis (13). A thrust bearing (14) is integrated into the pivot bearing (12). The weight of the drive train is transmitted to a stationary housing (8) by the thrust bearing (14) with the help of a ball bearing or toe bearing. A frictionless air bearing (3) is provided for horizontally supporting the drive shaft (5) in order to improve the measuring accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.