SE8401272L - - Google Patents

Info

Publication number
SE8401272L
SE8401272L SE8401272A SE8401272A SE8401272L SE 8401272 L SE8401272 L SE 8401272L SE 8401272 A SE8401272 A SE 8401272A SE 8401272 A SE8401272 A SE 8401272A SE 8401272 L SE8401272 L SE 8401272L
Authority
SE
Sweden
Prior art keywords
pulses
compressor
signal
pulse
operating state
Prior art date
Application number
SE8401272A
Other languages
Unknown language ( )
Other versions
SE441541B (en
SE8401272D0 (en
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 filed Critical
Publication of SE8401272D0 publication Critical patent/SE8401272D0/en
Publication of SE8401272L publication Critical patent/SE8401272L/
Publication of SE441541B publication Critical patent/SE441541B/en

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
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0284—Conjoint control of two or more different functions

Landscapes

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

Abstract

The method consists in that the first nominal amplitude value of the alternating component is changed in dependence on the mean value of the absolute amount of a first signal which is proportional to the gas parameter. Furthermore, the pulses obtained are counted out. In addition, a second signal is generated which returns the compressor into the stable operating state at a number of pulses which corresponds to the number of pulses which determines an operating state close to the unstable operating state of the compressor. The second signal is then stored. When a pulse is missing within the first predetermined time of the lack of the pulse, the pulses counted out and the second pulse are deleted. The device according to the invention for preventing the pumping of turbo compressors contains a device (1) for obtaining the first signal, a first filter (2), a first comparison element (3), a second filter (4), a first converter (5), a second comparison element (6) for obtaining pulses, an adder (7), a counter (8), a decoder (9), a first flip flop (10), a first device (11) for changing the operating characteristic of the compressor, a logical AND gate (12), a second device (13) for changing the loading on the compressor, a first delay element (14) and a first deletion unit (15). <IMAGE>
SE8401272A 1984-03-23 1984-03-07 PROCEDURE AND DEVICE FOR THE PREVENTION OF INSTABLE OPERATING CONDITIONS BY A CENTRIFUGAL COMPRESSOR SE441541B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843410792 DE3410792A1 (en) 1984-03-23 1984-03-23 Method and device for preventing pumping in turbo compressors

Publications (3)

Publication Number Publication Date
SE8401272D0 SE8401272D0 (en) 1984-03-07
SE8401272L true SE8401272L (en) 1985-09-08
SE441541B SE441541B (en) 1985-10-14

Family

ID=6231455

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8401272A SE441541B (en) 1984-03-23 1984-03-07 PROCEDURE AND DEVICE FOR THE PREVENTION OF INSTABLE OPERATING CONDITIONS BY A CENTRIFUGAL COMPRESSOR

Country Status (3)

Country Link
CH (1) CH665455A5 (en)
DE (1) DE3410792A1 (en)
SE (1) SE441541B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620614A1 (en) * 1986-06-20 1987-12-23 Gutehoffnungshuette Man METHOD FOR FILTERING A NOISY SIGNAL
US5012637A (en) * 1989-04-13 1991-05-07 General Electric Company Method and apparatus for detecting stalls
DE19816987A1 (en) * 1998-04-17 2000-02-03 Rag Ag Adapted pump limit of a centrifugal compressor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276674A (en) * 1963-03-06 1966-10-04 Shell Oil Co Method for preventing surging of compressors
US3963367A (en) * 1974-08-21 1976-06-15 International Harvester Company Turbine surge detection system
SU623996A1 (en) * 1977-03-29 1978-09-15 Предприятие П/Я М-5539 Surge control device for of axial turboexhauster set
DE2828124C2 (en) * 1978-06-27 1981-11-19 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Procedure to prevent pumping of turbo compressors

Also Published As

Publication number Publication date
SE441541B (en) 1985-10-14
DE3410792C2 (en) 1991-07-04
CH665455A5 (en) 1988-05-13
SE8401272D0 (en) 1984-03-07
DE3410792A1 (en) 1985-09-26

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