Vortex flow measuring sensor and vortex flow measuring transducer for measuring flow velocity of a fluid

Patent metadata

Field	Value
Publication number	US-2016123783-A1
Application number	US-201414893130-A
Country	US
Kind code	A1
Filing date	Apr 22, 2014
Priority date	May 24, 2013
Publication date	May 5, 2016
Grant date	—

Abstract

A vortex flow transducer for measuring the flow velocity of a fluid flowing in a measuring tube as well as to a vortex flow sensor for the vortex flow transducer. In such case, the vortex flow sensor includes a housing having a central axis and a connecting section, on which a shoulder is embodied, which has a bearing area. In a plane of the shoulder a membrane is arranged, whose edge is positioned over the bearing area and is axially spaced therefrom. The vortex flow sensor includes, furthermore, a flange shaped support system having a radial edge section and a cylindrical axial section, wherein the radial edge section lies with its surface against the shoulder of the platform and the cylindrical axial section extends parallel to the central axis, so that the membrane is supported against the support system upon application of a predetermined pressure on the membrane.

First claim

1 - 8 . (canceled)

9 . A vortex flow sensor for a vortex flow transducer for measuring flow velocity of a fluid through by a measuring tube, comprising:
a housing having a central axis and a connecting section, on which a shoulder is embodied, said shoulder has a bearing area; a membrane arranged in a plane of said shoulder, whose edge is positioned over said bearing area and is axially spaced therefrom; and a flange shaped support device having a radial edge section and a cylindrical axial section, wherein: said radial edge section lies with its surface against said shoulder of said housing; and said cylindrical axial section extends parallel to said central axis, so that said membrane is supported against said support device upon application of a predetermined pressure on said membrane.

10 . The vortex flow sensor as claimed in claim 9 , wherein:
an outer diameter of said cylindrical axial section of said support device corresponds to an inner diameter of an electrode section of said housing, so that said support device is held within said housing via a press fit.

11 . The vortex flow sensor as claimed in claim 9 , wherein:
said support device surrounds along said central axis a section of a sleeve-shaped, first electrode arrangement, which connects with a first surface of said membrane, via a transition piece.

12 . The vortex flow sensor as claimed in claim 11 , wherein:
said support device has a central axial bore, whose diameter is so dimensioned that said sleeve shaped, first electrode arrangement passes through said bore, without contacting an inner surface of said bore.

13 . The vortex flow sensor as claimed in claim 11 , wherein:
the vortex flow sensor is a capacitive vortex flow sensor; said housing has a second electrode arrangement having at least one counter-electrode; and said second electrode arrangement surrounds at least one section of said first electrode arrangement, spaced from said support device.

14 . The vortex flow sensor as claimed in claim 9 , wherein:
said membrane is circular and has a surrounding, ring-shaped, thickened edge.

15 . The vortex flow sensor as claimed in claim 11 , wherein:
there is arranged on a second surface of said membrane a bending-stiff, thin, sensor paddle, which extends along said central axis of the vortex flow sensor away from said second surface of said membrane; and said sensor paddle has two planar main surfaces.

16 . A vortex flow measuring transducer for measuring flow velocity of a fluid flowing in a measuring tube, which comprises:
connected with the measuring tube, a bluff body, which serves for producing Kármán vortices; and responding to pressure fluctuations produced by the vortices; and a capacitive vortex sensor, which is installed downstream from said bluff body in a wall side opening of the measuring tube, said capacitance comprises a vortex flow sensor for a vortex flow transducer for measuring flow velocity of a fluid through by a measuring tube, comprising: a housing having a central axis and a connecting section, on which a shoulder is embodied, said shoulder has a bearing area; a membrane arranged in a plane of said shoulder, whose edge is positioned over said bearing area and is axially spaced therefrom; and a flange shaped support device having a radial edge section and a cylindrical axial section, wherein: said radial edge section lies with its surface against said shoulder of said housing; and said cylindrical axial section extends parallel to said central axis, so that said membrane is supported against said support device upon application of a predetermined pressure on said membrane.

Assignees

• Flowtec Ag

Inventors

• Strub Andreas
• Witkowski Natalie
• Wiederkehr Dominique
• Kamber Sascha

Classifications

• G01F1/3218 Primary

  bluff body design · CPC title

• G01F1/3209 Primary

  using Karman vortices · CPC title

• G01F1/3266

  by sensing mechanical vibrations · CPC title