GB986915A - Improvements in and relating to evacuating arrangements employing a roots pump - Google Patents

Improvements in and relating to evacuating arrangements employing a roots pump

Info

Publication number
GB986915A
GB986915A GB7005/63A GB700563A GB986915A GB 986915 A GB986915 A GB 986915A GB 7005/63 A GB7005/63 A GB 7005/63A GB 700563 A GB700563 A GB 700563A GB 986915 A GB986915 A GB 986915A
Authority
GB
United Kingdom
Prior art keywords
pump
motor
evacuating
relating
roots pump
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
GB7005/63A
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.)
Micafil AG
Original Assignee
Micafil AG
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 Micafil AG filed Critical Micafil AG
Publication of GB986915A publication Critical patent/GB986915A/en
Expired 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
    • 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
    • F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

986,915. Rotary pumps. MICAFIL A.G. Feb. 21, 1963 [March 1, 1962], No. 7005/63. Heading F1F. [Also in Divisions G3 and H2] A D.C. motor GM drives a Roots pump RP and is energised from three-phase source RST through thyratrons Th associated with firing-angle control apparatus E. The armature current of the motor is limited by comparing the voltage-drop across series resistor R1 with a reference voltage, the resultant of this comparison being adapted to change the phase position of the firing impulses in the appropriate sense. Since the motor is shuntexcited, the pump does not exceed a desired speed under no-load conditions. The system provides automatic regulation of the driving torque applied to the pump when the intake pressure or difference of pressure between intake and exhaust is below a level at which the pump can safely be operated with full torque.
GB7005/63A 1962-03-01 1963-02-21 Improvements in and relating to evacuating arrangements employing a roots pump Expired GB986915A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH260462A CH419423A (en) 1962-03-01 1962-03-01 Roots pump driven by a DC motor

Publications (1)

Publication Number Publication Date
GB986915A true GB986915A (en) 1965-03-24

Family

ID=4237485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7005/63A Expired GB986915A (en) 1962-03-01 1963-02-21 Improvements in and relating to evacuating arrangements employing a roots pump

Country Status (2)

Country Link
CH (1) CH419423A (en)
GB (1) GB986915A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314890A3 (en) * 2001-11-21 2003-08-20 Kabushiki Kaisha Toyota Jidoshokki Control system for vacuum pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314890A3 (en) * 2001-11-21 2003-08-20 Kabushiki Kaisha Toyota Jidoshokki Control system for vacuum pump

Also Published As

Publication number Publication date
CH419423A (en) 1966-08-31

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