DE680573C - Overflow valve, especially for rotary lobe fluid pumps - Google Patents
Overflow valve, especially for rotary lobe fluid pumpsInfo
- Publication number
- DE680573C DE680573C DEN39925D DEN0039925D DE680573C DE 680573 C DE680573 C DE 680573C DE N39925 D DEN39925 D DE N39925D DE N0039925 D DEN0039925 D DE N0039925D DE 680573 C DE680573 C DE 680573C
- Authority
- DE
- Germany
- Prior art keywords
- piston
- valve
- overflow valve
- rotary lobe
- spring
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/08—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage
- F16K17/082—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage with piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Description
Überströrnventil, insbesondere für Drehkolbenflüssigkeitspumpen Es ist bekannt, bei Pumpen bzw. in deren Druckraum oder Druckleitung ein Überströmventil mit einem federbelasteten Absperrkolben anzuordnen, welches die Auf- .. gabe hat, bei auftretendem überdruck oder bei nicht benötigter Fördermenge diese in den Saugraum der Pumpe oder deren. Saugbehälter zurückzuführen. Falls die gesamte oder auch nur der größere Teil der Fördermenge durch dieses Ventil abfließen muß, entsteht ein sehr erheblicher- Druckanstieg, da der Ventilkolben in diesem Fälle sehr hoch gehoben werden muß; was wiederum einen erheblichen Druckanstieg der Ventilfeder zur Folge hat. Daraus ergibt sich z. B. eine überlastung des Antriebsmotors. und ein Ansprechen der Motorsicherungen mit darauffoIgenden Betriebsstörungen. Man. kann wohl durch eine genügend lange Ventilfeder den Druckanstieg in tragbaren Grenzen halten; doch wird die Feder und mit ihr das Federgehäuse sowie die benötigte Nachstellvorrichtung für die Feder im Verhältnis zum Ventil selbst ganz unverhältnismäßig lang: Erfindungsgemäß werden diese vorerwähnten Mängel dadurch beseitigt, daß -der Absperrkolben über seinem Ventilsitz eine an sich bekannte, die wirksame Ventilsitzfläche vergrößernde Kreisringfläche besitzt und dieser Kolben sich in einen austauschbaren, zylindrischen Ringkörper mit bei steigendem Il, Kolbenhub sich stark vergrößernden Durchtrittsöffnungen führt, wobei der die Kolbenringfläche beeinflussende Staudruck durch ein weiteres an sich bekanntes Drosselorgan noch zusätzlich beeinflußt wird.Overflow valve, especially for rotary lobe pumps Es it is known to have an overflow valve in pumps or in their pressure chamber or pressure line to be arranged with a spring-loaded shut-off piston, which has the task of ... in the event of overpressure or if the flow rate is not required, this into the suction chamber the pump or its. Returned suction container. If all of it or just the greater part of the flow must flow through this valve, a very considerable pressure increase, since the valve piston is lifted very high in this case must become; which in turn results in a considerable increase in pressure in the valve spring Has. This results in z. B. an overload of the drive motor. and a response of the engine fuses with subsequent malfunctions. Man. can probably go through a sufficiently long valve spring keep the pressure rise within acceptable limits; but becomes the spring and with it the spring housing and the required adjustment device for the spring in relation to the valve itself quite disproportionately long: according to the invention these aforementioned shortcomings are eliminated in that -the shut-off piston over its valve seat a known per se, which increases the effective valve seat area Has a circular ring surface and this piston turns into an exchangeable, cylindrical Annular body with through openings that increase greatly with increasing Il, piston stroke leads, whereby the dynamic pressure influencing the piston ring surface is caused by another known throttle member is also influenced.
Die Abb. i zeigt ein Ausführungsbeispiel, wobei in dem Gehäuse 2 und 3 ein Ventil mit Absperrkolben 5 sitzt, der durch eine Feder einstellbar belastet wird. , .Fig. I shows an embodiment, wherein in the housing 2 and 3 a valve with shut-off piston 5 is seated, which is loaded in an adjustable manner by a spring will. ,.
Das Ventil ist in Ruhelage gezeichnet und durch den Anschluß i mit dem Druckraum der Pumpe in Verbindung.The valve is shown in the rest position and through the connection i with the pressure chamber of the pump in connection.
Bei auftretendem überdruck wird zymächst der untere Teil des Ventilkegels beaufschlagt-und dadurch der Ventilkegels angehoben. Darauf -dringt Druckflüssigkeit in den Ring-.raum 9 und beaufschlagt die Kreisringfläche 6, wodurch der der Feder .entgegenwirkende Druck vergrößert wird und .ein größerer Hub des Ventilkegels erreichbar ist. In dem Gehäuse ist ein ringförmiger Körper 4 mit einer oder mehreren Drosselöffnungen 8 vorgesehen. Diese öffnungen 8 haben eine in Abb. 2 dargestellte Form. Hierdurch wird erreicht, -daß der Staudruck im Stau.-räum 9 in :jeder Höhenlage des Ventilkegels ein dem jeweiligen Federdruck entsprechende Größe aufweist. Die durch die öffnungen 8 - abfließende Flüssigkeit geht durch die Leitung io und -12 zum Saugraum der Pumpe oder deren Saugbehälter zurück. Um den Staudruck 9 noch nachträglich beeinflussen, zu können, ist.ein bekanntes Drossel-. Organ 11 in die Abflußleitung eingebaut. Die nachträgliche Beeinflussung kann dann nötig sein, wenn eine Maschinenanlage mit kaltem öl angefahren wird, das Öl sich später im Betriebszustand erwärmt und damit seine Zähflüssigkeit verändert. Der ringförmige Körper B ist austauschbar, - um eine einmal vorhandene überströmventilgröße für verschiedene Zähflüssigkeäten und Drücke für verschiedene Anlagen leicht anpassen zu können.If overpressure occurs, the lower part of the valve cone will grow acted upon - and thereby raised the valve cone. Hydraulic fluid penetrates on it in the annular .raum 9 and acts on the circular ring surface 6, whereby that of the spring . counteracting pressure is increased and. a larger stroke of the valve cone can be achieved is. In the housing is an annular body 4 with one or more throttle openings 8 provided. These openings 8 have a shape shown in FIG. Through this is achieved, -that the back pressure in the storage space 9 in: every height of the valve cone has a size corresponding to the respective spring pressure. The through the openings 8 - outflowing liquid goes through the line io and -12 to the suction chamber of the pump or their suction container back. To influence the dynamic pressure 9 afterwards, to be able to is. a well-known throttle. Organ 11 built into the drain line. Subsequent influencing may be necessary if a machine system is started up with cold oil, the oil later warms up in the operating state and so that its viscosity changes. The ring-shaped body B is interchangeable, - by an existing overflow valve size for different viscous liquids and pressures to be easily adjusted for different systems.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEN39925D DE680573C (en) | 1936-09-26 | 1936-09-26 | Overflow valve, especially for rotary lobe fluid pumps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEN39925D DE680573C (en) | 1936-09-26 | 1936-09-26 | Overflow valve, especially for rotary lobe fluid pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
DE680573C true DE680573C (en) | 1939-08-31 |
Family
ID=7348086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEN39925D Expired DE680573C (en) | 1936-09-26 | 1936-09-26 | Overflow valve, especially for rotary lobe fluid pumps |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE680573C (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE938947C (en) * | 1953-02-21 | 1956-02-09 | Heinrich Dipl-Ing Lang | Pressure medium pump for operating hydraulic machines in motor vehicles |
DE953489C (en) * | 1954-06-24 | 1956-11-29 | Jean Boivinet | Regulator for diaphragm pumps |
DE1023288B (en) * | 1952-08-21 | 1958-01-23 | Hydromatik G M B H | Pressure regulator for hydrostatic gears or pumps |
DE1028399B (en) * | 1954-12-11 | 1958-04-17 | Bosch Gmbh Robert | Lubricating oil metering device with storage space |
DE1032044B (en) * | 1954-07-15 | 1958-06-12 | Bosch Gmbh Robert | Lubrication pump |
DE1204072B (en) * | 1957-12-12 | 1965-10-28 | Colcrete Ltd | Device for discharging and simultaneously conveying cement-containing masses from a storage container with a single-shaft screw pump conveying downwards |
DE1264195B (en) * | 1963-07-09 | 1968-03-21 | Lucas Industries Ltd | Pressure relief valve |
DE2625555A1 (en) * | 1976-06-05 | 1977-12-15 | Teves Gmbh Alfred | PILOT VALVE |
DE19717922A1 (en) * | 1997-04-28 | 1998-10-29 | Schwaebische Huettenwerke Gmbh | Two-stage control valve |
DE29716274U1 (en) * | 1997-09-10 | 1999-01-14 | Lorentz, Bernt, 22457 Hamburg | Overflow valve |
DE19913805A1 (en) * | 1999-03-26 | 2000-04-20 | Bosch Gmbh Robert | Pressure limitation and safety valve for fuel feed pumps has valve body formed by plate of elastomer material to give short construction length |
DE19915555A1 (en) * | 1999-04-07 | 2000-10-12 | Zahnradfabrik Friedrichshafen | Displacement pump with flow regulating valve and pressure regulating valve, latter containing closure body loaded by spring force and sealing against sealing edge limiting sealing surface |
DE102010047401A1 (en) * | 2010-10-02 | 2012-04-05 | Wabco Gmbh | Valve, particularly pressure relief valve for fluid, has inlet closed against sealing assembly by sealing body with surface, and fluid enabler gap, particularly annular gap is provided between sealing body and sealing seat |
-
1936
- 1936-09-26 DE DEN39925D patent/DE680573C/en not_active Expired
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1023288B (en) * | 1952-08-21 | 1958-01-23 | Hydromatik G M B H | Pressure regulator for hydrostatic gears or pumps |
DE938947C (en) * | 1953-02-21 | 1956-02-09 | Heinrich Dipl-Ing Lang | Pressure medium pump for operating hydraulic machines in motor vehicles |
DE953489C (en) * | 1954-06-24 | 1956-11-29 | Jean Boivinet | Regulator for diaphragm pumps |
DE1032044B (en) * | 1954-07-15 | 1958-06-12 | Bosch Gmbh Robert | Lubrication pump |
DE1028399B (en) * | 1954-12-11 | 1958-04-17 | Bosch Gmbh Robert | Lubricating oil metering device with storage space |
DE1204072B (en) * | 1957-12-12 | 1965-10-28 | Colcrete Ltd | Device for discharging and simultaneously conveying cement-containing masses from a storage container with a single-shaft screw pump conveying downwards |
DE1264195B (en) * | 1963-07-09 | 1968-03-21 | Lucas Industries Ltd | Pressure relief valve |
DE2625555A1 (en) * | 1976-06-05 | 1977-12-15 | Teves Gmbh Alfred | PILOT VALVE |
DE19717922A1 (en) * | 1997-04-28 | 1998-10-29 | Schwaebische Huettenwerke Gmbh | Two-stage control valve |
DE29716274U1 (en) * | 1997-09-10 | 1999-01-14 | Lorentz, Bernt, 22457 Hamburg | Overflow valve |
EP0902223A1 (en) * | 1997-09-10 | 1999-03-17 | LORENTZ, Bernt | Relief valve |
WO1999013253A1 (en) * | 1997-09-10 | 1999-03-18 | Bernt Lorentz | Overflow valve |
US6189562B1 (en) | 1997-09-10 | 2001-02-20 | Bernt Lorentz | Overflow valve |
DE19913805A1 (en) * | 1999-03-26 | 2000-04-20 | Bosch Gmbh Robert | Pressure limitation and safety valve for fuel feed pumps has valve body formed by plate of elastomer material to give short construction length |
DE19915555A1 (en) * | 1999-04-07 | 2000-10-12 | Zahnradfabrik Friedrichshafen | Displacement pump with flow regulating valve and pressure regulating valve, latter containing closure body loaded by spring force and sealing against sealing edge limiting sealing surface |
DE102010047401A1 (en) * | 2010-10-02 | 2012-04-05 | Wabco Gmbh | Valve, particularly pressure relief valve for fluid, has inlet closed against sealing assembly by sealing body with surface, and fluid enabler gap, particularly annular gap is provided between sealing body and sealing seat |
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