DE332135C - Apparatus for measuring the absolute viscosity of liquids - Google Patents

Apparatus for measuring the absolute viscosity of liquids

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Publication number
DE332135C
DE332135C DENDAT332135D DE332135DD DE332135C DE 332135 C DE332135 C DE 332135C DE NDAT332135 D DENDAT332135 D DE NDAT332135D DE 332135D D DE332135D D DE 332135DD DE 332135 C DE332135 C DE 332135C
Authority
DE
Germany
Prior art keywords
measuring
liquids
gap
absolute viscosity
viscosity
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
Application number
DENDAT332135D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
C L F GUEMBEL DR ING
Original Assignee
C L F GUEMBEL DR ING
Publication date
Application granted granted Critical
Publication of DE332135C publication Critical patent/DE332135C/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
    • G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
    • G01N11/06—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by timing the outflow of a known quantity

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)

Description

Apparat zum messen der absoluten Zähigkeit von Flüssigkeiten. Zum Messen der Zähigkeit von Flüssigkei- i ten, insbesondere von Schmiermitteln, wird in Deutschland der Englersche Apparat bevorzugt. Die Messungen vermittels dieses Apparates. liefern aber für die Zähigkeit keine absolute Zahl, sondern sind von den Abmessungen des Englerschen Apparates abhängig.Apparatus for measuring the absolute viscosity of liquids. To the Measuring the viscosity of liquids, especially lubricants, is used in Germany the Engler apparatus is preferred. The measurements by means of this Apparatus. but do not provide an absolute number for the toughness, but are of depending on the dimensions of Engler's apparatus.

Um den Englerschen Apparat zur Messung absoluter Größen brauchbar zu machen, müßte in diesem ein Kapillarrohr verwendet werden. Die Verwendung eines solchen Rohres verbietet sich aber, weil solche Röhre schwer zu reinigen sind, die Auslaufzeiten bei zähen Ölen unzulässig groß und bei geringen Aus- . laufzeiten Korrektionen zur Berücksichtigung des Beschleunigungsdrucks notwendig werden.Around Engler's apparatus for measuring absolute quantities useful to make a capillary tube would have to be used in this. Using a Such a tube is forbidden because such tubes are difficult to clean The drainage times for viscous oils are impermissibly long and with low drainage times. terms Corrections to take the acceleration pressure into account become necessary.

Der im folgenden beschriebene Apparat beseitigt diese Nachteile. Derselbe besteht ähnlich wie der Eng lersche Apparat aus einem heizbaren Gefäß A, aus dem die Flüssigkeit im Boden in ein Meßgefäß ausströmt. Neu ; ist, daß die Flüssigkeit vor Eintritt in die Ausflußöffnung einen Spalt B durchströmen muß, dessen Abmessungen. so gewählt werden, daß laminares Strömen im Spalt gesichert ist. Der Spalt wird durch eine Scheibe C vom Halbmesser R und dein Boden D des Gefäßes A gebildet, in dem sich die Austrittsöffnung vom Halbmesser r befindet. Die Spalthöhe betrage h, der Druck der Flüssigkeitssäule über dem Spalt die Zähigkeitszahl n, dann ist das in der Zeit t '. ausfließende Volumen gegeben durch Durch Beobachtung der Ausflußzeit eines bestimmten Volumens V in einer bestimmten Zeit t läßt sich also bei bekannten Abmessungen des Apparates die Zähigkeitszahl berechnen.The apparatus described below overcomes these disadvantages. Similar to the Eng lersche apparatus, it consists of a heatable vessel A from which the liquid in the bottom flows out into a measuring vessel. New ; is that the liquid must flow through a gap B before entering the outlet opening, the dimensions of which. be chosen so that laminar flow is ensured in the gap. The gap is formed by a disk C of radius R and the bottom D of the vessel A , in which the outlet opening of radius r is located. The height of the gap is h, the pressure of the column of liquid above the gap is the viscosity number n, then that is in the time t '. outflowing volume given by By observing the outflow time of a certain volume V in a certain time t, the viscosity number can be calculated with known dimensions of the apparatus.

Das Besondere der neuen Konstruktion liegt darin, daß x. die Scheibe C leicht herausgenommen und damit der Spalt gereinigt werden kann, 2. die Durchlüssigkeitsgeschwindigkeit durch den Spalt, da der Halbmesser der Austrittsöffnung groß 'ist, so klein gewählt werden kann, daß die Beschleunigungshöhe praktisch vernachlässigt werden kann, 3. durch Wahl von Scheiben anderer Spalthöhen oder durch Verstellung der Spalthöhe an einer Scheibe mit entsprechender Einrichtung der Apparat in einfachster Weise verschieden zähen Flüssigkeiten angepaßt werden kann.The special feature of the new construction is that x. the disc C easily removed and so that the gap can be cleaned, 2. the flow rate chosen so small by the gap, since the radius of the outlet opening is large it can be seen that the level of acceleration can practically be neglected, 3. by choosing panes of other gap heights or by adjusting the gap height on a disk with the appropriate equipment, the apparatus in the simplest way different viscous liquids can be adapted.

Claims (1)

PATENT-ANsPRUcH: Apparat zum Messen der absoluten Zähigkeit von Flüssigkeiten durch Bestimmung der Ausflußzeit eines bestimmten Flüssigkeitsvolumens bei bekannter Druckhöhe, dadurch gekennzeichnet, daß der Durchflußspalt (B) für die Flüssigkeit aus einer Scheibe (C) einerseits und dem Boden (D) des Gefäßes anderseits gebildet wird.PATENT CLAIM: Apparatus for measuring the absolute viscosity of liquids by determining the outflow time of a certain volume of liquid with a known Pressure head, characterized in that the flow gap (B) for the liquid formed from a disc (C) on the one hand and the bottom (D) of the vessel on the other will.
DENDAT332135D Apparatus for measuring the absolute viscosity of liquids Expired DE332135C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE332135T

Publications (1)

Publication Number Publication Date
DE332135C true DE332135C (en) 1921-01-25

Family

ID=6201391

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT332135D Expired DE332135C (en) Apparatus for measuring the absolute viscosity of liquids

Country Status (1)

Country Link
DE (1) DE332135C (en)

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