EP0169336A1 - Control and actuation system, especially for water ring vacuum pumps - Google Patents

Control and actuation system, especially for water ring vacuum pumps Download PDF

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Publication number
EP0169336A1
EP0169336A1 EP85106437A EP85106437A EP0169336A1 EP 0169336 A1 EP0169336 A1 EP 0169336A1 EP 85106437 A EP85106437 A EP 85106437A EP 85106437 A EP85106437 A EP 85106437A EP 0169336 A1 EP0169336 A1 EP 0169336A1
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EP
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Prior art keywords
control
regulation
line
control system
pump
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Application number
EP85106437A
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German (de)
French (fr)
Inventor
Heinz Bohn
Werner Dr. Fink
Reinhold Lühmann
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TDK Micronas GmbH
ITT Inc
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Deutsche ITT Industries GmbH
ITT Industries Inc
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Publication of EP0169336A1 publication Critical patent/EP0169336A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/001—General arrangements, plants, flowsheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply

Definitions

  • the object of the present invention is now to achieve a comprehensive regulation for vacuum systems including the aforementioned speed adjustment, adapted to the specific conditions in water ring vacuum pumps.
  • the invention proposes, in a regulation and control system of the type mentioned, the sensors for regulating to minimize fresh water consumption, regulating to constant or time-variable suction pressure, preventing cavitation, regulating to the maximum engine power or to regulate the switching on and off of several pumps via a control unit, which has one or more inputs and outputs as well as temporal and logical links for a programmable logic controller, by means of which a change in speed and power for the drive motor or pumps or Pumping is done to connect to the actuators.
  • a temperature sensor should be arranged in the exhaust air line or in the separating tank of the pumps or pumps or in the process water line, which is connected via the control unit to a control valve in the fresh water line.
  • a bypass bypassing the control valve should be provided with a valve that can be set to a minimum fresh water quantity.
  • the water ring temperature should be varied within the limits adapted to the operation.
  • a pressure sensor that can be set to a constant suction pressure can be arranged in the suction line (vacuum line) of the pump or pumps and is connected to the electric motors of the pumps via the control unit.
  • a speed controller for a minimum speed of the electric motor ensuring the stability of the water ring should then be provided in the control device and the control device should have a mechanical speed frequency overload preventing the pump from overloading.
  • an air inlet with a control valve can also be provided, which to prevent cavitation, depending on the temperature in the exhaust air line or in the separating tank and the pressure in the intake line via the control unit according to a predetermined limit pressure curve to a regulated air addition in the suction line is adjustable.
  • a power sensor can also be connected to the power supply line for the drive motor of the vacuum pump, by means of which the drive motor is continuously adjusted to its nominal power via the control unit and the speed controller.
  • the systems shown, for example, in the figures essentially consist of the vacuum lines and the exhaust air lines, which are connected by the vacuum pumps 6 driven by electric motors 5. To complement the water ring in the pumps, they are still connected to a fresh water line, in which a shut-off valve 13 and a dirt filter 10 are installed.
  • control unit 12 which Has more inputs and outputs as well as temporal and logical links via a programmable logic controller, are interconnected.
  • a pressure sensor 3 is installed in the control circuit (consisting of the control unit 12, the electric motors 5 and the liquid vacuum pumps 6.
  • This control circuit ensures that a constant suction pressure is generated via the vacuum line, regardless of the gas accumulation is held. Any pressure / time diagrams can be drawn through a temporal intake pressure specification. Setting a minimum speed of the speed controller 11 ensures that the water ring remains stable. Setting a maximum frequency ensures that the mechanical load on the vacuum pump is not exceeded.
  • valve 1 is controlled as a function of the temperature in the exhaust air line 7 and the pressure in the vacuum line 3 via the control device 12, so that a predetermined limit curve P pressure is reached as a function of the temperature.
  • the switching on and off of pumps can also be controlled automatically, that is, a pump control program to e.g. B. Switch on pumps for power peaks or switch from one pump to another to operate several pumps evenly.

Abstract

Ein geschlossener Regelkreis steuert Druck und/oder Temperatur in einem Regelungs- und Steuerungssystem für Wasserring-Vakuumpumpen. Die Ansaugfähigkeit der Pumpen wird entweder durch Geschwindigskeitskontrolle, durch die Operationswassertemperatur, durch Ein- Ausschalten der Pumpen oder durch Nebenluft gesteuert. Die elektronische Steuervorrichtung (Mikrocomputer) kann einer dieser Steuermöglichkeiten die Priorität geben.A closed control loop controls pressure and / or temperature in a regulation and control system for water ring vacuum pumps. The suction capacity of the pumps is controlled either by speed control, by the operating water temperature, by switching the pumps on or by secondary air. The electronic control device (microcomputer) can give priority to one of these control options.

Description

Die Regelung physikalischer Größen wie Förderströme, Förderdrücke und dergl. bei Prozessen, in denen Pumpen verwendet werden,geschieht heute in der Regel noch überwiegend durch Ein- und Ausschaltbefehle an die Pumpen und insbesondere durch Verstellung von Drosselventilen oder sonstigen Regelorganen. Da diese Art von Regelung in vielen Fällen mit hohem Wartungs- und Energieaufwand verbunden ist, wurde bei modernen Anlagen mit Kreisel- und Kolbenpumpen auch schon vorgeschlagen, die Regelaufgaben mittels stufenloser Anpassung der Pumpendrehzahl bei minimiertem Energieverbrauch vorzunehmen.The regulation of physical variables such as flow rates, delivery pressures and the like. In processes in which pumps are used, these days, as a rule, are still predominantly carried out by switching the pumps on and off and, in particular, by adjusting throttle valves or other control elements. Since this type of control is in many cases associated with high maintenance and energy expenditure, it has already been proposed in modern systems with centrifugal and piston pumps to carry out the control tasks by means of stepless adjustment of the pump speed with minimized energy consumption.

Durch die vorliegende Erfindung soll nun die Aufgabe gelöst weraen, eine umfassende Regelung für Vakuumsysteme unter Einbeziehung der vorgenannten Drehzahlverstellung zu schaffen, angepaßt an die spezifischen Verhältnisse bei Wasserring-Vakuumpumpen.The object of the present invention is now to achieve a comprehensive regulation for vacuum systems including the aforementioned speed adjustment, adapted to the specific conditions in water ring vacuum pumps.

Zur Lösung dieser Aufgabe wird dazu erfindungsgemäß vorgeschlagen, bei einem Regelungs- und Steuerungssystem der eingangs genannten Art, die Sensoren für die Regelung zur Minimierung des Frischwasserverbrauchs, zur Regelung auf konstanten oder zeitlich veränderlichen Ansaugdruck, zur Verhinderung von Kavitation, zur Regelung auf maximale Motorleistung oder zur Regelung der Zu- und Abschaltung von mehreren Pumpen über ein Steuergerät, welches einen oder mehrere Ein- und Ausgänge sowie zeitliche und logische Verknüpfungen für eine speicherprogrammierbare Steuerung aufweist, durch die ein Drehzahl- und Leistungsveränderung für den oder die Antriebsmotore der Pumpe oder Pumpen erfolgt, mit den Stellgliedern zu verbinden.To solve this problem, the invention proposes, in a regulation and control system of the type mentioned, the sensors for regulating to minimize fresh water consumption, regulating to constant or time-variable suction pressure, preventing cavitation, regulating to the maximum engine power or to regulate the switching on and off of several pumps via a control unit, which has one or more inputs and outputs as well as temporal and logical links for a programmable logic controller, by means of which a change in speed and power for the drive motor or pumps or Pumping is done to connect to the actuators.

Bei einer Regelung zur Minimierung des Frischwasserverbrauchs der Pumpe oder Pumpen soll dabei in der Abluftleitung bzw. im Abscheidebehälter der Pumpen oder Pumpen oder in der Betriebswasserleitung ein Temperaturmeßwertaufnehmer angeordnet sein, der über das Steuergerät mit einem Stellventil in der Frischwasserleitung verbunden ist. Bei einem Betrieb ohne Abscheidebehälter in der Frischwasserleitung soll ein das Stellventil umgehender Bypass mit einem auf eine Mindestfrischwassermenge einstellbaren Ventil vorgesehen sein.In the case of a regulation for minimizing the fresh water consumption of the pump or pumps, a temperature sensor should be arranged in the exhaust air line or in the separating tank of the pumps or pumps or in the process water line, which is connected via the control unit to a control valve in the fresh water line. When operating without a separating tank in the fresh water line, a bypass bypassing the control valve should be provided with a valve that can be set to a minimum fresh water quantity.

Bei der Regelung auf konstanten oder zeitlich veränderlichen Ansaugedruck soll die Wasserringtemperatur in dem Betrieb angepaßten Grenzen variiert werden. Dabei kann in der Ansaugeleitung (Vakuumleitung) der Pumpe oder Pumpen ein auf konstanten Ansaugedruck einstellbarer Druckaufnehmer angeordnet sein, der über das Steuergerät mit den Elektromotoren der Pumpen in Verbindung steht. Im Steuergerät soll dann ein Drehzahlsteller für eine die Stabilität des Wasserringes sichernde Mindestdrehzahl des Elektromotors vorgesehen sein und das Steuergerät soll eine die mechanische überlastung der Pumpe verhindernde Frequenzbegrenzung aufweisen.When regulating to constant or time-variable suction pressure, the water ring temperature should be varied within the limits adapted to the operation. In this case, a pressure sensor that can be set to a constant suction pressure can be arranged in the suction line (vacuum line) of the pump or pumps and is connected to the electric motors of the pumps via the control unit. A speed controller for a minimum speed of the electric motor ensuring the stability of the water ring should then be provided in the control device and the control device should have a mechanical speed frequency overload preventing the pump from overloading.

In der Ansaugeleitung der Pumpen kann weiterhin ein Lufteinlaß mit einem Stellventil vorgesehen sein, welches zur Verhinderung von Kavitation, abhängig von der Temperatur in der Abluftleitung bzw. im Abscheidebehälter sowie dem Druck in der Ansaugeleitung über das Steuergerät nach einer vorgegeoenen Grenzdruckkurve auf eine geregelte Luftzugabe in die Ansaugeleitung einregelbar ist.In the intake line of the pumps, an air inlet with a control valve can also be provided, which to prevent cavitation, depending on the temperature in the exhaust air line or in the separating tank and the pressure in the intake line via the control unit according to a predetermined limit pressure curve to a regulated air addition in the suction line is adjustable.

In die Stromzuführungsleitung für den Antriebsmotor der Vakuumpumpe kann ferner ein Leistungsaufnehmer eingeschaltet sein, durch den über das Steuergerät und den Drehzahlsteller eine dauernde Einregelung des Antriebsmotors auf seine Nennleistung erfolgt.A power sensor can also be connected to the power supply line for the drive motor of the vacuum pump, by means of which the drive motor is continuously adjusted to its nominal power via the control unit and the speed controller.

Es liegt auch im Rahmen der Erfindung, daß die genannten verschiedenen Regelungen einzeln, in Gruppen oder auch alle gleichzeitig zur Anwendung kommen.It is also within the scope of the invention that the various regulations mentioned are used individually, in groups or all at the same time.

An Hand der beiliegenden Zeichnungen, auf denen

  • Fig. 1 ein Vakuumsystem mit Wasserring-Vakuumpumpen ohne Wasserabscheider und
  • Fig. 2 ein solches Vakuumsystem mit Wasserabscheider zeigen, soll die Erfindung nachfolgend noch näher erläutert werden.
Based on the attached drawings, on which
  • Fig. 1 shows a vacuum system with water ring vacuum pumps without water separators and
  • Fig. 2 show such a vacuum system with water separator, the invention will be explained in more detail below.

Die in den Figuren beispielsweise dargestellten Systeme be - stehen im wesentlichen aus den Vakuumleitungen und den Ab- luftleitungen, die durch die von Elektromotoren 5 angetriebenen Vakuumpumpen 6 verbunden sind. Zur Ergänzung des Wasserringes in den Pumpen, stehen diese noch mit einer Frischwasserleitung, in die ein Absperrventil 13 und ein Schmutzfilter 10 eingebaut sind, in Verbindung.The systems shown, for example, in the figures essentially consist of the vacuum lines and the exhaust air lines, which are connected by the vacuum pumps 6 driven by electric motors 5. To complement the water ring in the pumps, they are still connected to a fresh water line, in which a shut-off valve 13 and a dirt filter 10 are installed.

Man erkennt, daß die verschiedenen Sensoren, wie der Druckaufnehmer 3 in der Vakuumleitung, der Temperaturmeßwertaufnehmer 7 in der Abluftleitung bzw. im Abscheidebehälter 8 und der elektrische Leistungsaufnehmer 15 in der Stromleitung zu dem Elektromotoren und die verschiedenen Regelorgane über ein Steuergerät 12, welches meh-rere Ein- und Ausgänge sowie zeitliche und logische Verknüpfungen über eine speicherprogrammierbare Steuerung aufweist, untereinander verbunden sind.It can be seen that the various sensors, such as the pressure sensor 3 in the vacuum line, the temperature sensor 7 in the exhaust air line or in the separating tank 8 and the electrical power sensor 15 in the power line to the electric motors and the various control elements via a control unit 12, which Has more inputs and outputs as well as temporal and logical links via a programmable logic controller, are interconnected.

Es lassen sich nun die verschiedensten Regelungen und Steuerungen einzeln oder auch in unterschiedlichen Kombinationen oder auch alle gemeinsam durchführen, wie beispiels-weise

  • 1 Regelung zur Minimierung des Frischwasserverbrauchs a Betrieb ohne Abscheider Die Frischwasser-Zufuhr in Fig. 1 zu der oder den Vakuumpumpen 6 ist durch ein Bypassventil 14 so eingestellt, daß eine Mindestmenge zur Aufrechterhaltung des Wasserringes gewährleitst ist. Durch den Regelkreis Temperaturmeßwertaufnehmer 7 in der Abluftleitung, welcher proportional zur Wasserringtemperatur ist, das Steuergerät 12 sowie das Stellventil 9 wird die Frischwassermenge so gesteuert, daß eine einstellbare Ablufttemperatur geregelt wird. Je höher die Ablufttemperatur eingestellt ist, um so weniger Frischwasser wird verbraucht.
  • b Betrieb mit Abscheider In der Fig. 2 wird die Wassertemperatur im AbscheideBehälter 8 dadurch konstant gehalten, daß über den Temperaturmeßwertaufnehmer 7 das Steuergerät 12 sowie das Stellventil 9 auf konstante Temperatur geregelt wird.
A wide variety of regulations and controls can now be carried out individually or in different combinations or all together, for example
  • 1 Regulation for minimizing fresh water consumption a Operation without a separator The fresh water supply in FIG. 1 to the vacuum pump or pumps 6 is set by a bypass valve 14 in such a way that a minimum quantity for maintenance is maintained the water ring is guaranteed. Through the control loop temperature sensor 7 in the exhaust air line, which is proportional to the water ring temperature, the control unit 12 and the control valve 9, the amount of fresh water is controlled so that an adjustable exhaust air temperature is regulated. The higher the exhaust air temperature, the less fresh water is used.
  • b Operation with separator In FIG. 2, the water temperature in the separating container 8 is kept constant by regulating the control unit 12 and the control valve 9 to a constant temperature via the temperature sensor 7.

In beiden Beispielen kann auf zusätzliche Armaturen bei Mehr-Pumpen-Betrieb in der Wasservorlage-Sammelleitung verz-ichtet werden.In both examples, there is no need for additional fittings in the multi-pump operation in the water supply manifold.

2 Regelung auf konstanten oder zeitlich veränderlichen Ansaugdruck2 Control to constant or time-variable suction pressure

In der Vakuumleitung der Fig. 1 und 2 ist ein Druckaufnehmer 3 im Regelkreis (bestehend aus dem Steuergerät 12, den Elektromotoren 5 und den Flüssigkeitsvakuumpumpen 6 eingebaut. Dieser Regelkreis sorgt dafür, daß unabhängig vom Gasanfall über die Vakuumleitung ein konstanter Ansaugdruck gehalten wird. Durch eine zeitliche Ansaugdruckvorgabe können beliebige Druck-/Zeit-Diagramme gefahren werden. Durch Einstellung einer minimalen Drehzahl des Drehzahlstellers 11 wird gewährleistet, daß der Wassering stabil bleibt. Durch die Einstellung einer maximalen Frequenz wird sichergestellt, daß die mechanische Belastung der Vakuumpumpe nicht überfahren wird.1 and 2, a pressure sensor 3 is installed in the control circuit (consisting of the control unit 12, the electric motors 5 and the liquid vacuum pumps 6. This control circuit ensures that a constant suction pressure is generated via the vacuum line, regardless of the gas accumulation is held. Any pressure / time diagrams can be drawn through a temporal intake pressure specification. Setting a minimum speed of the speed controller 11 ensures that the water ring remains stable. Setting a maximum frequency ensures that the mechanical load on the vacuum pump is not exceeded.

3 Verhindern von Kavitation3 Prevent cavitation

In den Fig. 1 und 2 wird in Abhängigkeit von der Temperatur in der Abluftleitung 7 sowie dem Druck in der Vakuumleitung 3 über das Steuergerät 12 das Ventil 1 geregelt, damit eine vorgegebene Grenzkurve P Druck in Abhängigkeit von der Temperatur erreicht wird.1 and 2, the valve 1 is controlled as a function of the temperature in the exhaust air line 7 and the pressure in the vacuum line 3 via the control device 12, so that a predetermined limit curve P pressure is reached as a function of the temperature.

4 Regelung auf maximale Motorleistungsaufnehme4 Regulation for maximum engine power consumption

Der elektrische Leistungsaufnehmer 15 in Fig. 1 und 2 sorgt in Verbindung mit dem Steuergerät 12 dafür, daß über den Drehzahlsteller 11 der Motor 5 immer mit seiner Nennleistung angetrieben wird.The electrical power sensor 15 in FIGS. 1 and 2, in conjunction with the control unit 12, ensures that the motor 5 is always driven at its nominal power via the speed controller 11.

Darüberhinaus läßt sich auch das Zu- und Abschalten von Pumpen automatisch steuern, also ein Pumpensteuerungsprogramm, um z. B. für Leistungsspitzen Pumpen zuzuschalten oder zum gleichmäßigen Betrieben mehrerer Pumpen von einer Pumpe zur anderen umzuschalten, durchführen.In addition, the switching on and off of pumps can also be controlled automatically, that is, a pump control program to e.g. B. Switch on pumps for power peaks or switch from one pump to another to operate several pumps evenly.

Claims (10)

1. Regelungs- und Steue-rungssystem insbes. für Wasserring-Vakuumpumpen oder dergl. dadurch gekennzeichnet, daß die Sensoren (3, 7, 15) für die Regelung zur Minimierung des Frischwasserverbrauchs, zur Regelung auf konstanten oder zeitlich veränderlichen Ansaugdruck, zur Verhinderung von Kavitation, zur Regelung auf maximale Motorleistungsaufnahme oder zur Regelung der Zu- und Abschaltung von mehreren Pumpen über ein Steuergerät (12), welches einen oder mehrere Ein- und Ausgänge sowie zeitliche und logische Verknüpfungen für eine speicherprogrammierbare Steuerung aufweist, durch die eine Drehzahl- und Leistungsveränderung für den oder die Antriebsmotore (5) der Pumpe (6) erfolgt, mit den Stellgliedern verbunden sind.1. Regulation and control system esp. For water ring vacuum pumps or the like. Characterized in that the sensors (3, 7, 15) for the control to minimize fresh water consumption, to regulate to constant or temporally variable suction pressure, to prevent Cavitation, to regulate the maximum motor power consumption or to regulate the switching on and off of several pumps via a control unit (12), which has one or more inputs and outputs as well as temporal and logical links for a programmable logic controller erung, through which a speed and power change for the drive motor (s) (5) of the pump (6) takes place, are connected to the actuators. 2. Regelungs- und Steuerungssystem nach Anspruch 1, dadurch gekennzeichnet, daß bei einer Regelung zur Minimierung des Frischwasserverbrauchs der Pumpe oder Pumpen (6) in der Abluftleitung bzw. im Abscheidebehälter (8) der Pumpe oder der Pumpen oder in der Betriebswasserleitung ein Temperaturmeßwertaufnehmer (7) angeordnet ist, der über das Steuergerät (12) mit einem Stellventil (9) in der Frischwasserleitung verbunden ist.2. Regulation and control system according to claim 1, characterized in that in a regulation to minimize the fresh water consumption of the pump or pumps (6) in the exhaust air line or in the separating tank (8) of the pump or pumps or in the process water line, a temperature sensor ( 7) is arranged, which is connected via the control device (12) to a control valve (9) in the fresh water line. 3. Regelungs- und Steuerungssystem nach ANspruch 2, dadurch gekennzeichnet, daß bei einem Betrieb ohne Abscheidebehäl-, ter (8) in der Frischwasserleitung ein das Stellventil (9) umgehender Bypass mit einem auf eine Mindestfrischwassermenge einstellbaren Ventil (14) vorgesehen ist.3. Regulation and control system according to claim 2, characterized in that when operating without separator, ter (8) in the fresh water line, a bypass valve (9) bypass with an adjustable to a minimum amount of fresh water valve (14) is provided. 4. Regelungs- und Steuerungssystem nach Anspruch 1, dadurch gekennzeichnet, daß zur Regelung auf konstanten oder zeitlich veränderlichen Ansaugedruck die Wasserringtemperatur in dem Betrieb angepaßten Grenzen variiert wird.4. Regulation and control system according to claim 1, characterized in that the water ring temperature is varied in the operation adapted limits for regulation to constant or time-variable suction pressure. 5. Regelungs- un Steuerungssystem nach Anspruch 4, dadurch gekennzeichnet, daß in der Ansaugeleitung (Vakuumleitung) der Pumpe oder Pumpen (6) ein Druckaufnehmer (3) angeordnet ist, der über das Steuergerät (12) mit den Elektromotoren (5) der Pumpe in Verbindung steht.5. Regulating and control system according to claim 4, characterized in that a pressure sensor (3) is arranged in the suction line (vacuum line) of the pump or pumps (6) which is connected to the electric motors (5) of the pump via the control unit (12). 6. Regelungs- und Steuerungssystem nach Anspruch 5, dadurch gekennzeichnet, daß im Steuergerät (12) ein Drehzahlsteller (11) für eine die Stabilität des Wasserringes sichernde Mindestdrehzahl des Elektromotors vorgesehen ist.6. Regulation and control system according to claim 5, characterized in that in the control device (12) a speed controller (11) is provided for a stability of the water ring ensuring minimum speed of the electric motor. 7. Regelungs- und Steuerungssystem nach Anspruch 5 und 6, dadurh gekennzeichnet, daß das Steuergerät (12) eine die mechanische überlastung der Pumpe (6) verhindernde Frequenzbegrenzung aufweist.7. Regulation and control system according to claim 5 and 6, characterized in that the control device (12) has a mechanical overload of the pump (6) preventing frequency limitation. 8. Regeiungs- und Steuerungssystem nach Anspruch 1, dadurch gekennzeichnet, daß in der Ansaugeleitung der Pumpe (6) ein Lufteinlaß mit einem Stellventil (1) vorgesehen ist, welches zur Verhinderung von Kavitation, abhängig von der Temperatur in der Abluftleitung bzw. im Abscheidebehälter (8) sowie dem Druck in der Ansaugeleitung über das Steuergerät (12) nach einer vorgegebenen Grenzdruckkurve auf eine geregelte Luftzugabe in die Ansaugeleitung einregelbar ist.8. control and control system according to claim 1, characterized in that in the suction line of the pump (6) an air inlet with a control valve (1) is provided, which to prevent cavitation, depending on the temperature in the exhaust air line or in the separating container (8) and the pressure in the intake line can be adjusted via the control unit (12) according to a predetermined limit pressure curve to a regulated air addition in the intake line. 9. Regelungs- und Steuerungssystem nach Anspruch 1, dadurch gekennzeichnet, daß in die Stromzuführungsleitung für den Antriebsmotor (5) der Vakuumpumpe (6) ein Leistungsaufnehmer(15) eingeschaltet ist, durch den über das Steuergerät (12) und den Drehzahlsteller (11) eine dauernde Einregelung des Antriebsmotors auf seine Nennleistung erfolgt.9. Regulation and control system according to claim 1, characterized in that in the power supply line for the drive motor (5) of the vacuum pump (6) a power sensor (15) is switched on, by means of which the control motor (12) and the speed controller (11) continuously adjust the drive motor to its nominal power. 10. Regelungs- und Steuerungssystem, dadurch gekennzeichnet, daß die Regelungen nach Anspruch 2 bis 9,einzeln, in Gruppen oder alle gleichzeitig zur Anwendung kommen.10. regulation and control system, characterized in that the regulations according to claim 2 to 9, individually, in groups or all are used simultaneously.
EP85106437A 1984-05-30 1985-05-24 Control and actuation system, especially for water ring vacuum pumps Withdrawn EP0169336A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843420144 DE3420144A1 (en) 1984-05-30 1984-05-30 CONTROL AND CONTROL SYSTEM, IN PARTICULAR. FOR WATERING VACUUM PUMPS
DE3420144 1984-05-30

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EP0169336A1 true EP0169336A1 (en) 1986-01-29

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EP85106437A Withdrawn EP0169336A1 (en) 1984-05-30 1985-05-24 Control and actuation system, especially for water ring vacuum pumps

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US (1) US4655688A (en)
EP (1) EP0169336A1 (en)
JP (1) JPS611886A (en)
CA (1) CA1244914A (en)
DE (1) DE3420144A1 (en)
DK (1) DK239085A (en)
NO (1) NO852106L (en)

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Publication number Priority date Publication date Assignee Title
FR2706644A1 (en) * 1993-06-11 1994-12-23 Normalab Vacuum regulation device.
WO2019174239A1 (en) * 2018-03-14 2019-09-19 Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd Liquid ring pump control

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Publication number Priority date Publication date Assignee Title
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DE3420144A1 (en) 1985-12-05
DK239085A (en) 1985-12-01
CA1244914A (en) 1988-11-15
DK239085D0 (en) 1985-05-29
US4655688A (en) 1987-04-07
JPH0158357B2 (en) 1989-12-11
JPS611886A (en) 1986-01-07

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