SE8401272D0 - PROCEDURE AND DEVICE FOR PREVENTING THE INSTABLE OPERATING CONDITION OF A CENTRIFUGAL COMPRESSOR - Google Patents
PROCEDURE AND DEVICE FOR PREVENTING THE INSTABLE OPERATING CONDITION OF A CENTRIFUGAL COMPRESSORInfo
- Publication number
- SE8401272D0 SE8401272D0 SE8401272A SE8401272A SE8401272D0 SE 8401272 D0 SE8401272 D0 SE 8401272D0 SE 8401272 A SE8401272 A SE 8401272A SE 8401272 A SE8401272 A SE 8401272A SE 8401272 D0 SE8401272 D0 SE 8401272D0
- Authority
- SE
- Sweden
- Prior art keywords
- pulses
- compressor
- signal
- pulse
- operating state
- Prior art date
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>
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 true SE8401272D0 (en) | 1984-03-07 |
SE8401272L 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)
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)
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 |
-
1984
- 1984-03-06 CH CH109584A patent/CH665455A5/en not_active IP Right Cessation
- 1984-03-07 SE SE8401272A patent/SE441541B/en not_active IP Right Cessation
- 1984-03-23 DE DE19843410792 patent/DE3410792A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
SE441541B (en) | 1985-10-14 |
DE3410792C2 (en) | 1991-07-04 |
SE8401272L (en) | 1985-09-08 |
CH665455A5 (en) | 1988-05-13 |
DE3410792A1 (en) | 1985-09-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1991001027A3 (en) | Illegal sequence detection and protection circuit | |
KR900010232A (en) | Screw compressor | |
SE8401272D0 (en) | PROCEDURE AND DEVICE FOR PREVENTING THE INSTABLE OPERATING CONDITION OF A CENTRIFUGAL COMPRESSOR | |
CA2124889A1 (en) | Method of Securing a Filter Element to a Blade of a Fan | |
US4578648A (en) | Dynamic verification gate circuit | |
EP1170863A3 (en) | Fir filter and setting method of coefficient thereof | |
US5027118A (en) | Analog signal logarithmic envelope detector | |
JPS54155023A (en) | Automatic sound volume reducer | |
EP0522528A1 (en) | A prediction filter | |
US5350956A (en) | Deviation limiting transmission circuit | |
CA1140266A (en) | Adaptive delta modulation network | |
US5701261A (en) | Dynamic filter | |
CA1099384A (en) | Circuit arrangement for determining physical parameters of flowing media by the ultrasonic method | |
TW341742B (en) | A method and apparatus for discriminating synchronous or asynchronous states of viterbi decoded data | |
EP0330332A3 (en) | Digital recording apparatus | |
JPS51113201A (en) | Gas or liquid pump | |
JPS5641497A (en) | Fan shroud | |
JPS51121809A (en) | The improvement of a roots type rotor | |
CA2020119C (en) | Digital word output high-pass filter apparatus | |
JPH01241912A (en) | Stabilizing circuit for iir type digital filter | |
LINIGIER et al. | Stability of two-step methods for variable integration steps(differential systems)[Interim Report] | |
JPS61150527A (en) | Analog signal one bit encoder | |
Chao | Bond-percolation threshold and lattice structure | |
JPS636175B2 (en) | ||
Wallin | Divergence of multipoint Padé approximation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
Ref document number: 8401272-3 Effective date: 19921005 Format of ref document f/p: F |