DE2538943A1 - Variable speed drive for pumps and fans - is controlled by differential manometer across output regulating electronic circuit - Google Patents

Variable speed drive for pumps and fans - is controlled by differential manometer across output regulating electronic circuit

Info

Publication number
DE2538943A1
DE2538943A1 DE19752538943 DE2538943A DE2538943A1 DE 2538943 A1 DE2538943 A1 DE 2538943A1 DE 19752538943 DE19752538943 DE 19752538943 DE 2538943 A DE2538943 A DE 2538943A DE 2538943 A1 DE2538943 A1 DE 2538943A1
Authority
DE
Germany
Prior art keywords
triac
fan
fans
pumps
manometer
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.)
Ceased
Application number
DE19752538943
Other languages
German (de)
Inventor
Joachim Nagel
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19752538943 priority Critical patent/DE2538943A1/en
Publication of DE2538943A1 publication Critical patent/DE2538943A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

A special manometer has inputs from the inlet and discharge sides of the pump or fan. The high pressure side rotates a fan tail blade and the low pressure side rotates a disc with a slot in it. A lamp (8) on one side shines on a photoelectric cell (9) on the other and the amount of light falling on the cell depends on how much of the slot is covered by the blade. The photoelectric cell (9) is in series with the gate of a triac (10) so that the phase cut off varies with the differential pressure. The triac is in the motor circuit of the pump or fan and varies the speed steplessly to maintain a constant preset discharge pressure.

Description

Beschreibung it Schutzansprüchen Der vorliegende erfindungsgemäße Gedanke bezieht sich auf eine automatische, druckabhängige, stufenlose Drehzahlregelung von Pumpen und Ventilatoren zur Förderung von flüssigen und gasförmigen medien jeglicher Art, mit Wechsel- der Drehstrommotoren.Description it protection claims The present invention The idea relates to an automatic, pressure-dependent, stepless speed control of pumps and fans for conveying liquid and gaseous media of any kind Type, with alternating or three-phase motors.

Der Vorteil dieser neuen Regelung ist, daß sie zn jede vorhandene Anlage mit vorgenannten Pumpen oder Ventilatoren , nachträglich eingebaut werden kann. Bisher wurden Druckregelungen entweder pneumatisch mit Überströmventilen oder mit Polzahl-schaltbaren motoren ausgerüstet, tuas hohe Kosten verursacht. Die neue Regelung dagegen kostet nur einen Bruchteil einer Pneumatischen Regelung, ist ohne groBen Aufwand auch nachträglich zu installieren und senkt die Betriebskosten.The advantage of this new scheme is that it applies to every existing one System with the aforementioned pumps or fans can be retrofitted can. So far, pressure controls were either pneumatic with overflow valves or Equipped with motors that can be switched with the number of poles, which causes high costs. The new Control, on the other hand, costs only a fraction of a pneumatic control, but is without It takes a lot of effort to retrofit it and lowers the operating costs.

Arbeitsweise der Anlage am Beispiel einer Heizungsregelung: In einer Heizungsanlage soll die Umwälzpumpe unabhängig von der Fördermenge einen Differenzdruck von 2m Ws halte.How the system works using the example of a heating control system: In one In the heating system, the circulation pump should have a differential pressure regardless of the flow rate hold from 2m Ws.

Hierzu wird ein Differenzdruck-Xanometer an den Heizungsvorlauf und den -rücklauf angeschlossen. Als Differenzdruckmanometer wird ein sogenannter Doppel-manometer mit 2 Zeigern verwendet, wobei der Zeiger für den Heizungsvorlauf (höherer Druck) als Fächer und der Zeiger für den Heizungsrücklauf (niedriger Druck) als Scheibe ausgebildet ist (siehe Zeichnung DR II). Die Scheibe hat einen schmalen Schlitz von der Lange entsprechend 2m Ws auf der manometer-Skala. Der Fächerzeiger ist so groß das der Schlitz in der Scheibe vollständig überdeckt werden kann. Unter dem befindet sich eine Glimmlampe, über dem Schlitz ein Fotouiiderstand. Bei steigendem Differenzdruck schiebt sich der Fächerzeiger über den Schlitz, dadurch bekommt der Fotowiderstand weniger Licht und sein widerstand ändert sich. Durch die Änderung des tUiderstandes ändert sich die Gate Spannung an dem Triac dadurch ändert sich der Phasenanschnitt und damit die Drehzahl der Pumpe (siehe Zeichnung DR I ).For this purpose, a differential pressure xanometer is connected to the heating flow and the return is connected. A so-called double manometer is used as the differential pressure manometer used with 2 pointers, the pointer for the heating flow (higher Pressure) as a fan and the pointer for the heating return (low pressure) as Disc is formed (see drawing DR II). The disc has a narrow one The length of the slot corresponds to 2m Ws on the manometer scale. The fan pointer is so large that the slot in the disc can be completely covered. Under there is a neon lamp and a photo resistor above the slot. With increasing Differential pressure pushes the fan pointer over the slot, which gives the Photoresistor less light and its resistance changes. By the change the tUiderstandes changes the gate voltage on the triac thereby changes the phase control and thus the speed of the pump (see drawing DR I).

Schutzans rüche P X Åutomatischs, stufenlose Drehzahlregelung von Pumpen und Ventilatoren zur Förderung von flüssigen- und gasförmigen medien jeglicher Art mittels Wechsel-oder Drehstrommotore. Dadurch gekennzeichnet das die Regelung elektronisch durch Halbleiter Bauelemente geschieht und der meßwert über ein speziell entwickeltes Differenzdruckmanometer erfaßt wird.Protection claims P X Automatic, infinitely variable speed control from Pumps and fans for conveying liquid and gaseous media of all kinds Type by means of alternating or three-phase motors. This marked the regulation electronically through semiconductor components and the measured value via a special developed differential pressure manometer is recorded.

Claims (1)

2. Gegenstand nach Anspruch 1) dadurch gekennzeichnet, daß bei dem Differenzdruckmanometer der eine Zeiger als Scheibe mit einem Schlitz und der andere Zeiger als Fächerzeiger ausgebildet ist (siehe Zeichnung DR II) 3. Gegenstand nach Anspruch 1) dadurch gekennzeichnet, daß der meßwert durch ein Differenzdruckmanometer (Doppelmanometer) bei Differenzdrücken oder durch ein nanometer bei einfachen Drücken über eine Glüht2. Article according to claim 1) characterized in that in the Differential pressure manometer one pointer as a disc with a slot and the other Pointer is designed as a fan pointer (see drawing DR II) 3 Claim 1) characterized in that the measured value is measured by a differential pressure manometer (Double manometer) for differential pressures or by a nanometer for single pressures about a glow lampe oder Leuchtdiode gemessen wird. lamp or light emitting diode is measured. 4. Gegenstand nach Anspruch 1! dadurch gekennzeichnet, daß dis Regelung des motors über einen Phasenschnitt mittels eines Triac oemacht wird.4. Object according to claim 1! characterized in that dis regulation of the motor is oemacht via a phase cut using a triac. 5. Gegenstand nach Anspruch 1) dadurch gekennzeichnet, daß die Drehzahl zusätzlich durch ein Potentiometer von Hand geregelt werden kann.5. The object of claim 1) characterized in that the speed can also be regulated manually using a potentiometer. 6. Gegenstand nach Anspruch t) dadurch gekennzeichnet, daß der Triac durch eine Feinsicherung vor Überlastung geschützt ist.6. The article of claim t) characterized in that the triac is protected from overload by a microfuse. 7. Gegenstand nach Anspruch 1) dadurch gekennzeichnet, daß der Fotowiderstand in einem trichterförmigen Cehäuse ist, um Lichteinfall durch die Raumbeleuchtung zu unterbinden.7. The article of claim 1) characterized in that the photoresistor in a funnel-shaped housing to prevent light from entering the room to prevent. 8. Gegenstand nach Anspruch 1) dadurch gekennzeichnet, daß der Fotowiderstand an einer Schiene verstellbar befestigt ist.8. The object of claim 1) characterized in that the photoresistor is adjustable on a rail. 9. Gegenstand nach Anspruch 1) dadurch gekennzeichnet, daß bei Drehstrommotoren 3 Triac verwendet werden.9. The object of claim 1) characterized in that in three-phase motors 3 triac can be used.
DE19752538943 1975-09-02 1975-09-02 Variable speed drive for pumps and fans - is controlled by differential manometer across output regulating electronic circuit Ceased DE2538943A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752538943 DE2538943A1 (en) 1975-09-02 1975-09-02 Variable speed drive for pumps and fans - is controlled by differential manometer across output regulating electronic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752538943 DE2538943A1 (en) 1975-09-02 1975-09-02 Variable speed drive for pumps and fans - is controlled by differential manometer across output regulating electronic circuit

Publications (1)

Publication Number Publication Date
DE2538943A1 true DE2538943A1 (en) 1977-03-03

Family

ID=5955380

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752538943 Ceased DE2538943A1 (en) 1975-09-02 1975-09-02 Variable speed drive for pumps and fans - is controlled by differential manometer across output regulating electronic circuit

Country Status (1)

Country Link
DE (1) DE2538943A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367276A1 (en) * 1988-11-04 1990-05-09 SCHÖRLING GMBH & CO. WAGGONBAU Road sweeper with suction means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367276A1 (en) * 1988-11-04 1990-05-09 SCHÖRLING GMBH & CO. WAGGONBAU Road sweeper with suction means

Similar Documents

Publication Publication Date Title
US3501899A (en) Constant-flow air sampler
GB1478597A (en) Pumping apparatus
DE3542370A1 (en) METHOD FOR REGULATING THE PUMP HEIGHT OF A PUMP
DE3214485A1 (en) SWITCHING ARRANGEMENT FOR PUMPS FOR TAKING SAMPLES FROM THE ATMOSPHERA
ES322312A1 (en) Hydrostatic transmission. (Machine-translation by Google Translate, not legally binding)
DE2538943A1 (en) Variable speed drive for pumps and fans - is controlled by differential manometer across output regulating electronic circuit
DE2251904A1 (en) LIMIT LOAD CONTROL FOR HYDRAULIC DRIVES
US3610783A (en) Metering devices
DE2046061A1 (en) Chiller for motor vehicles
DE969286C (en) Control device for side channel pumps
ES426713A1 (en) Devices for feeding fluid under pressure to at least two load circuits
DE3444169A1 (en) Arrangement for optimising the operation of vacuum pump installations
Cederlund Yxor av Hagebyhögatyp
DE3528821A1 (en) Hydrostatic drive of a fan
US2735440A (en) Device for continuous supply of a liquid
DE667347C (en) Blower with inlet for grains that opens into an injector-like compressed air nozzle
DE695726C (en) Device for stepless regulation of the delivery rate of a reciprocating compressor
US3095818A (en) Flow control means for a pumping station
DE574930C (en) Integrator, especially for flow rates
ES369424A1 (en) Fluid flow control instrumentality
DE473686C (en) Gear pump for variable performance
DE739971C (en) Electric underwater motor with water-filled runners room
DE386995C (en) Device for extracting air, steam and condensed water from vacuum steam heaters
DE1450810A1 (en) Automatic fluid change gear
DE6902149U (en) CONTROL DEVICE FOR PUMPS

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: F04B 49/06

8131 Rejection