DE471852C - Procedure for avoiding the noise that occurs during the operation of rotary lobe pumps - Google Patents

Procedure for avoiding the noise that occurs during the operation of rotary lobe pumps

Info

Publication number
DE471852C
DE471852C DEA51361D DEA0051361D DE471852C DE 471852 C DE471852 C DE 471852C DE A51361 D DEA51361 D DE A51361D DE A0051361 D DEA0051361 D DE A0051361D DE 471852 C DE471852 C DE 471852C
Authority
DE
Germany
Prior art keywords
pump
piston
avoiding
procedure
bore
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
DEA51361D
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.)
Armaturen & Maschinenfabrik Ak
Original Assignee
Armaturen & Maschinenfabrik Ak
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Armaturen & Maschinenfabrik Ak filed Critical Armaturen & Maschinenfabrik Ak
Priority to DEA51361D priority Critical patent/DE471852C/en
Application granted granted Critical
Publication of DE471852C publication Critical patent/DE471852C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/30Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Description

Verfahren zur Vermeidung des beim Betrieb von Schieber-Drehkolbenpumpen entstehenden Geräusches Die Schieber-Drehkolbenpumpen erzeugen bei hohen Drehzahlen ein summendes Geräusch, welches vor allen Dingen bei der Verwendung dieser Pumpen für Haushaltungszwecke äußerst störend ist. Das Geräusch ist wahrscheinlich darauf zurückzuführen, daß die umlaufenden Pumpenteile Eigenschwingungen ausführen und diese Eigenschwingungen sich in Schallwellen umsetzen.Procedure for avoiding the operation of rotary lobe pumps resulting noise The vane rotary lobe pumps generate at high speeds a humming noise, especially when using these pumps is extremely annoying for housekeeping purposes. The sound is probably on it due to the fact that the rotating pump parts run natural vibrations and these natural vibrations are converted into sound waves.

Erfinderin hat erkannt, daß das störende Geräusch beseitigt oder doch zum mindesten stark gedämpft werden kann, wenn man dem Saugraum der Pumpen während ihres Betriebes etwas Luft zuführt. Die Zuführung der Luft darf jedoch nur in ganz geringem Maße erfolgen und muß beim Stillstand der Pumpen selbsttätig aufhören. Da diese Pumpen meistens mit Fußventil ausgerüstet sind, steht bei Stillstand der Pumpe das Belüftungsorgan unter dem Druck der in der-Pumpensteigleitung befindlichen Flüssigkeitssäule und muß deshalb einen vollkommenen Abschluß gewährleisten.The inventor has recognized that the annoying noise is eliminated or at least can be at least strongly attenuated if the suction chamber of the pumps during adds some air to their operation. The supply of air, however, is only allowed in the whole to a small extent and must stop automatically when the pumps come to a standstill. Since these pumps are usually equipped with a foot valve, the Pump the ventilation device under the pressure of that in the pump riser Liquid column and must therefore ensure a perfect seal.

Auf der Zeichnung ist ein Ausführungsbeispiel einer entsprechend der Erfindung ausgebildeten Schieber-Drehkolbenpumpe im Querschnitt dargestellt.In the drawing, an embodiment is one corresponding to the Invention trained vane rotary lobe pump shown in cross section.

Die Pumpe besteht aus dem Pumpengehäuse i mit dem Einlaß 2 und Auslaß 3 sowie aus der zentrisch auf der Welle q. sitzenden Kolbentrommel 5 mit den Sch.ieberkolben 6. Zwischen dem Ein- und Auslaß ist entsprechend der Erfindung ein Belüftungsventil für den Einlaß vorgesehen.The pump consists of the pump housing i with the inlet 2 and outlet 3 as well as from the centric on the shaft q. seated piston drum 5 with the slide valve piston 6. According to the invention, there is a ventilation valve between the inlet and outlet intended for the inlet.

In eine Gewindebohrung des Pumpengehäuses i ist ein hohler Gewindestutzen 7 geschraubt, der das Pumpengehäuse teilweise überragt und einen mit Muttergewinde versehenen, oben geschlossenen Zylinder 8 aufnimmt. Der Zylinder 8 besitzt oben eine enge Bohrung 9 und unter dieser eine ebenfalls durchbohrte Dichtungsscheibe io aus Gummi o. dgl. Im Zylinder 8 gleitet ein Kolben i i mit einem Ringwulst 12 auf dem Kolbenboden, und zwischen dem Kolben i i und dem Boden der Bohrung des Pumpengehäuses i ist eine Schraubenfeder 13 eingeschaltet. Das untere Ende dieser Bohrung ist durch einen Kanal 1q. mit dem Einlaß 2 bzw. dem Saugstutzen der Pumpe verbunden.A hollow threaded connector is located in a threaded hole in the pump housing i 7 screwed, which partially protrudes beyond the pump housing and one with a nut thread provided, top closed cylinder 8 receives. The cylinder 8 has the top a narrow bore 9 and under this a sealing washer also drilled through io made of rubber or the like. A piston i i with an annular bead 12 slides in the cylinder 8 on the piston head, and between the piston i i and the bottom of the bore of the pump housing i a coil spring 13 is switched on. The lower end of this hole is through a channel 1q. connected to the inlet 2 or the suction port of the pump.

Beim Arbeiten der Pumpe entsteht im Einlaß 2 ein Unterdruck, welcher den Kolben i i abwärts bewegt, so daß sich die Regelbohrung 9 öffnet und Luft in den Raum oberhalb des Kolbens i i eintritt. Diese Luft gelangt durch den Zwischenraum zwischen Kolben i i und Zylinder 8 in das Innere des Stutzens 7 und aus diesem durch den Kanal 1q. in den Saugstutzen z. Beim Stillstand der Pumpe hört der Unterdruck im Saugstutzen 2 auf, und der Kolben i i schließt unter der Einwirkung der Feder 13 die Bohrung 9 ab, indem sich der Ringwulst 12 gegen die Dichtungsscheibe io legt. Die während des Betriebes der Pumpe zugeführte Luftmenge muß möglichst gering sein; sie ist. bestimmt durch die obere Bohrung, durch die Federbelastung und durch das Kolbenspiel, d. h. durch den Zwischenraum zwischen Kolben und Zylinder. Die Feder ist derart zu bemessen, daß sich der. Kolben mit seinem Ringwulst beim Stillstand der Pumpe dicht gegen die Dichtungsscheibe des Zylinders legt, also ein sicherer Abschluß des Ventils erzeugt wird. Dementsprechend muß der Kolbenquerschnitt so groß sein, daß der zwischen der Außenluft und dem Inneren der Pumpe bestehende Druckunterschied die Abwärtsbewegung des Kolbens beim Betrieb der Pumpe bewirkt. Je größer der Kolbenquerschnitt ist, desto sicherer ist die Wirkung des Ventils, da dann eine um so stärkere, den Ventilschluß bewirkende Feder verwendet werden kann.When the pump is working, a negative pressure arises in the inlet 2, which moves the piston ii downwards, so that the control bore 9 opens and air enters the space above the piston ii. This air passes through the space between the piston ii and the cylinder 8 into the interior of the connecting piece 7 and out of this through the channel 1q. in the suction port z. When the pump comes to a standstill, the negative pressure in the suction nozzle 2 ceases, and the piston ii closes the bore 9 under the action of the spring 1 3 , in that the annular bead 12 rests against the sealing washer io. The amount of air supplied during operation of the pump must be as small as possible; she is. determined by the upper bore, the spring load and the piston clearance, ie the space between the piston and cylinder. The spring is to be dimensioned such that the. When the pump is at a standstill, the piston with its annular bead lies tightly against the sealing washer of the cylinder, thus creating a secure closure of the valve. Accordingly, the piston cross-section must be so large that the pressure difference existing between the outside air and the inside of the pump causes the downward movement of the piston during operation of the pump. The larger the piston cross-section, the more reliable the action of the valve, since then a stronger spring can be used which causes the valve to close.

Claims (4)

PATENTANSPRÜCHE: i. Verfahren zur Vermeidung des beim Betrieb von Schieber-Drehkolbenpumpen entstehenden Geräusches, dadurch gekennzeichnet, daß dem Saugraum der Pumpe während ihres Betriebes eine geringe Luftmenge zugeführt wird. PATENT CLAIMS: i. Procedure for avoiding the operation of Vane rotary lobe pumps resulting noise, characterized in that the A small amount of air is supplied to the suction chamber of the pump during its operation. 2. Pumpe zur Durchführung des Verfahrens nach Anspruch i, gekennzeichnet durch ein Ventil mit enger Bohrung, welches die Verbindung zwischen der Außenluft und dem Saugraum der Pumpe bei deren Betrieb herstellt, beim Stillstand der Pumpe sich jedoch selbsttätig schließt. 2. Pump for performing the method according to claim i, characterized by a Valve with a narrow bore, which the connection between the outside air and the The suction chamber of the pump establishes during its operation, but when the pump is at a standstill closes automatically. 3. Pumpe nach Anspruch 2, gekennzeichnet durch einen mit dem Saugraum der Pumpe verbundenen, oben geschlossenen und nur durch eine feine Bohrung (9) mit der Außenluft in Verbindung stehenden Zylinder (8), der einen unter Federdruck stehenden, die Bohrung (9) abschließenden Kolben (ii) aufnimmt. 3. Pump according to claim 2, characterized by one with the Suction chamber of the pump connected, closed at the top and only through a fine bore (9) Cylinder (8) in communication with the outside air, one of which is under spring pressure standing, the bore (9) final piston (ii) receives. 4. Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß der Kolben (ii) sich mit einem scharfen Ringwulst (i2) seines Bodens gegen eine Dichtung (io) des durchbohrten Zylinderdeckels legt.4. Pump according to claim 2, characterized in that the piston (ii) has a sharp annular bead (i2) its bottom against a seal (io) of the pierced cylinder cover.
DEA51361D 1927-07-07 1927-07-07 Procedure for avoiding the noise that occurs during the operation of rotary lobe pumps Expired DE471852C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA51361D DE471852C (en) 1927-07-07 1927-07-07 Procedure for avoiding the noise that occurs during the operation of rotary lobe pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA51361D DE471852C (en) 1927-07-07 1927-07-07 Procedure for avoiding the noise that occurs during the operation of rotary lobe pumps

Publications (1)

Publication Number Publication Date
DE471852C true DE471852C (en) 1929-02-15

Family

ID=6937915

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA51361D Expired DE471852C (en) 1927-07-07 1927-07-07 Procedure for avoiding the noise that occurs during the operation of rotary lobe pumps

Country Status (1)

Country Link
DE (1) DE471852C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102493A (en) * 1961-02-10 1963-09-03 American Brake Shoe Co Pressure balanced vane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102493A (en) * 1961-02-10 1963-09-03 American Brake Shoe Co Pressure balanced vane

Similar Documents

Publication Publication Date Title
DE1231986B (en) Valve for controlling brakes
DE471852C (en) Procedure for avoiding the noise that occurs during the operation of rotary lobe pumps
DE716384C (en) Master pressure cylinder for fluid brakes, especially for motor vehicles
DE483311C (en) Safety valve with counter pressure chamber and auxiliary valve
DE2457094A1 (en) DEVICE ON HYDRAULIC MOTOR
DE807756C (en) Control valve for the automatic air pressure brake of load trailers
DE509835C (en) Double acting vacuum pump
DE2141619A1 (en) Sealing and ventilation cover for hydraulic fluid containers
DE600284C (en) Device for regulating the filter material supply in cell drum internal pressure filters
DE437093C (en) Wheel lifting device for motor vehicles
DE541525C (en) Air braking device, especially for motor vehicles
DE122229C (en)
DE2410263C2 (en) Valve for starting an internal combustion engine using compressed air
DE673230C (en) Automatic, stepless capacity control device for reciprocating compressors
CH118528A (en) Method and device for braking with a four-stroke explosion engine.
AT163109B (en) High performance piston pump
DE1650321A1 (en) Pressure control valve
DE931333C (en) Pressure medium controlled trailer brake valve for direct and indirect trailer braking
DE460786C (en) Air pump driven by the compression pressure of a motor cylinder
DE724880C (en) Pressure reducer
DE338941C (en) Check valve
DE965983C (en) Control of the working piston in the working cylinder of a pneumatic or hydraulic, preferably pneumatic-hydraulic drive, especially for tipping vehicles
DE893889C (en) Suction air vessel with water level control for piston pumps
DE947976C (en) Automatic auxiliary outlet valve designed for piston steam machines and other gas expansion machines with a slot outlet for the working medium
DE515086C (en) Filling machine for sausage and other pulpy masses