Torque measuring device for a device measuring the flow of material
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United States of America Patent
Stats
-
Mar 16, 2004
Grant Date -
N/A
app pub date -
Aug 10, 2001
filing date -
Feb 12, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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