DE840166C - Measuring chamber for rotary piston meter - Google Patents
Measuring chamber for rotary piston meterInfo
- Publication number
- DE840166C DE840166C DEB3913D DEB0003913D DE840166C DE 840166 C DE840166 C DE 840166C DE B3913 D DEB3913 D DE B3913D DE B0003913 D DEB0003913 D DE B0003913D DE 840166 C DE840166 C DE 840166C
- Authority
- DE
- Germany
- Prior art keywords
- measuring chamber
- rotary piston
- rotary
- piston
- piston meter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
- G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
- G01F3/04—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
- G01F3/06—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing
- G01F3/10—Geared or lobed impeller meters
Description
Die Erfindung betrifft eine stegförmige Meßkammer für Drehkolbenzähler mit zwei um ihre Mittelachsen umlaufenden, zwangsläufig miteinander verbundenen Drehkolben. Jeder dieser Drehkolben hat mehr als zwei Kolbenecken, Zähne oder Flügel. Diese Drehkolbenzähler werden im allgemeinen mit einer herausnehmbaren Meßkammer ausgerüstet, welche in das Zählergehäuse eingeschoben, eingedrückt oder frei stehend bzw. hängend eingebracht wird. Die Meßkammer hat hierbei neben anderem die Aufgabe, die Abdichtung der umlaufenden Drehkolben an den Außenseiten gegen das Gehäuse sowie an den Stirnseiten der Kolben gegen Boden und Deckel des Gehäuses zu bewirken, und zwar dadurch, daß die Form der Meßkammerwände den Stirnseiten der Drehkolben sowie den Weg der Flanken derselben mit möglichst geringem Spiel angepaßt wird. Der zur Flankenabdichtung dienende Teil der Meßkammerinnenfläche hat hierbei in der Regel die Form eines Halbkreiszylinders. The invention relates to a web-shaped measuring chamber for rotary piston meters with two revolving around their central axes, inevitably connected to one another Rotary piston. Each of these rotary lobes has more than two piston corners, teeth or vanes. These rotary piston meters are generally equipped with a removable measuring chamber equipped, which are pushed into the meter housing, pressed in or free-standing or is introduced hanging. The measuring chamber has, among other things, the task of the sealing of the rotating pistons on the outside against the housing as well to effect on the end faces of the piston against the bottom and cover of the housing, and in that the shape of the measuring chamber walls corresponds to the end faces of the rotary lobes as well the path of the flanks of the same is adapted with as little play as possible. The for The part of the inner surface of the measuring chamber that serves to seal the flank usually has in this case the shape of a semicircular cylinder.
Diese Form der Meßkammer hat verschiedene Nachteile. Die mit geringstem Spiel an der Meßkammerwand vorbeigleitende Drehkolbenflanke wird zwar gegen Übertritt von Leckflüssigkeit zwischen Ein- und Austrittsseite um so besser abgedichtet, je länger dieDichtfläche inUmfangsrichtung ist; dieser Vorteil ist aber praktisch äußerst geringfügig gegenüber dem Nachteil, daß die Bewegung des Meßorgans durch die langgezogene Dichtfläche, insbesondere auch beim Messen von Flüssigkeiten größerer Zähigkeit, erheblich gebremst wird, so daß Anlaufempfindlichkeit und Druckverlust des Messers ungünstig beeinflußt werden. Da ferner die Meßkammer fast stets aus hochwertigem Material hergestellt werden muß, besitzt die bekannte Ausführung den weiteren Nachteil eines großen Aufwands an hochwertigen Baustoffen. This shape of the measuring chamber has various disadvantages. The one with the least Game on the measuring chamber wall sliding past the rotary piston flank is admittedly against overflow of leakage fluid between the inlet and outlet side, the better sealed, depending the sealing surface is longer in the circumferential direction; but this advantage is practically extreme slightly compared to the disadvantage that the movement of the measuring element by the elongated Sealing surface, especially when measuring liquids of greater viscosity, is slowed down considerably, so that the knife is susceptible to start-up and pressure loss are adversely affected. Furthermore, since the measuring chamber is almost always made of high quality Material has to be produced, the known design has the further disadvantage a large amount of high-quality building materials.
Der Gegenstand der Erfindung vermeidet die geschilderten Nachteile. Kennzeichnend für denselben ist die Ausbildung der Meßkammer als stegförmiges Bauteil, dessen Längsachse senkrecht zur Durchflußrichtung steht. Die kleinste Breite des Stegs ist bestimmt durch den Abstand von zwei aufeinanderfolgenden Kolbenecken, Zähnen oder Flügeln, die mit einer kleinen Überdeckung die Ein- und Austrittsseite des Zählers gegeneinander abdichten; die größte Stegbreite ist damit kleiner als der Durchmesser der Drehkolben. Auf diese Weise ergibt sich eine außerordentlich kleine Meßkammer, die die Vorteile kleinen Durchflußwiderstands, hoher Anlaufempfindlichkeit und geringsten Baustoffaufwands in sich vereinigt. Eine merkbare Beeinträchtigung der Meßgenauigkeit gegenüber der bekannten Ausführung findet, wie praktische Versuche gezeigt haben, nicht statt. The subject matter of the invention avoids the disadvantages outlined. Characteristic for the same is the design of the measuring chamber as a web-shaped component, whose longitudinal axis is perpendicular to the direction of flow. The smallest width of the The land is determined by the distance between two consecutive piston corners, Teeth or wings that cover the entry and exit side with a small overlap seal the meter against each other; the largest web width is therefore smaller than the diameter of the rotary piston. In this way there is an extraordinary small measuring chamber, which has the advantages of small flow resistance, high start-up sensitivity and the least amount of building materials. A noticeable drawback the measurement accuracy compared to the known design takes place, such as practical experiments have shown not held.
Der Erfindungsgegenstand ist in der Zeichnung an einem Ausführungsbeispiel dargestellt, und zwar zeigt Abb. I einen Querschnitt durch eine Meßkammer der bekannten Ausführung, Abb. 2 einen Querschnitt durch eine Meßkammer gemäß der Erfindung. The subject of the invention is shown in the drawing using an exemplary embodiment shown, namely Fig. I shows a cross section through a measuring chamber of the known Embodiment, Fig. 2 shows a cross section through a measuring chamber according to the invention.
Im Zählergehäuse a ist die stegförmige Meßkammer b angebracht, in welcher Achsen c befestigt sind, die die umlaufenden Drehkolben d tragen. Die Breite e der stegförmigen Meßkammer ist nicht wesentlich größer als der Abstand zweier aufeinanderfolgender Zähne und kleiner als der Durchmesser der Drehkolben d. In the meter housing a, the web-shaped measuring chamber b is attached, in which axes c are attached, which carry the rotating pistons d. The width e of the web-shaped measuring chamber is not significantly greater than the distance between two consecutive teeth and smaller than the diameter of the rotary lobes d.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB3913D DE840166C (en) | 1943-01-23 | 1943-01-23 | Measuring chamber for rotary piston meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB3913D DE840166C (en) | 1943-01-23 | 1943-01-23 | Measuring chamber for rotary piston meter |
Publications (1)
Publication Number | Publication Date |
---|---|
DE840166C true DE840166C (en) | 1952-05-29 |
Family
ID=6953464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB3913D Expired DE840166C (en) | 1943-01-23 | 1943-01-23 | Measuring chamber for rotary piston meter |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE840166C (en) |
-
1943
- 1943-01-23 DE DEB3913D patent/DE840166C/en not_active Expired
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