Patent US4968215A successfully refreshed from Google Patents.
US4968215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for control of a turbocompressor
Assignee: Everllence SE
•
Filing: 1988-06-06
•
Granted: 1990-11-06
•
Expires: 2008-06-06
Abstract
Abstract An anti-surge control of a turbocompressor includes a controller which controls the progressive opening or closing of a blow-off valve as a function of the working point location relative to a blow-off line defined in the characteristic field. A quick opening of the blow-off valve upon the occurrence of a close approach to surge is effective by applying a correction signal to the integral section of the controller.
Inventors
- 👤 Wilfried Blotenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:59
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0207
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
283 words
A turbocompressor control for use with a turbocompressor having an inlet connected to an upstream line and an outlet connected to a downstream line, comprising: first sensor means, connected to the upstream line, for sensing the volumetric rate of flow in the upstream line and for producing a signal representative of said volumetric rate of flow sensed; second sensor means, connected to the downstream line, for sensing the discharge pressure in the downstream line and for producing a signal representative of said discharge pressure; a blow-off valve connected to said downstream line for relieving the discharge pressure; function generator means for receiving said discharge pressure signal and for generating a set point signal representing a minimum volumetric flow rate from the blow-off curve corresponding to the discharge pressure sensed; difference means for outputting a control signal representative of the difference between the set point signal and the signal representative of the volume rate of flow; threshold means for receiving said control signal and detecting the control value of the control signal passing a predetermined threshold and outputting a trigger signal when the control signal has passed the predetermined threshold; control means for receiving said control signal and said trigger signal, said control means including a proportional controller receiving said control signal and outputting a signal having a value proportional to said set point signal, an integral controller for receiving said control signal and outputting a signal which is the integral of said set point signal, as a function of time, and a signal-forming stage for receiving said trigger signal and generating a correction signal, said correction signal being input to said integral controller so as to intensify the output of said integral controller.
Claim 2
Dependent Claim
283 words
A turbocompressor control for use with a turbocompressor having an inlet connected to an upstream line and an outlet connected to a downstream line, comprising: first sensor means, connected to the upstream line, for sensing the volumetric rate of flow in the upstream line and for producing a signal representative of said volumetric rate of flow sensed; second sensor means, connected to the downstream line, for sensing the discharge pressure in the downstream line and for producing a signal representative of said discharge pressure; a blow-off valve connected to said downstream line for relieving the discharge pressure; function generator means for receiving said discharge pressure signal and for generating a set point signal representing a minimum volumetric flow rate from the blow-off curve corresponding to the discharge pressure sensed; difference means for outputting a control signal representative of the difference between the set point signal and the signal representative of the volume rate of flow; threshold means for receiving said control signal and detecting the control value of the control signal passing a predetermined threshold and outputting a trigger signal when the control signal has passed the predetermined threshold; control means for receiving said control signal and said trigger signal, said control means including a proportional controller receiving said control signal and outputting a signal having a value proportional to said set point signal, an integral controller for receiving said control signal and outputting a signal which is the integral of said set point signal, as a function of time, and a signal-forming stage for receiving said trigger signal and generating a correction signal, said correction signal being input to said integral controller so as to intensify the output of said integral controller.
Claim 3
Dependent Claim
31 words
A turbocompressor control according to claim 1, further comprising an adjustable time delay connected to said controller, said correction signal being fed to said integral controller via said adjustable time delay.
Claim 4
Dependent Claim
15 words
A turbocompressor control according to claim 1, wherein: said control means includes a differential controller.
Claim 5
Dependent Claim
186 words
In a turbo compressor control for use with a turbo compressor having an inlet connected to an upstream line and a outlet connected to a downstream line, with a first sensing means to sense a first turbo compressor parameter, and second sensing means to sense a second turbo compressor parameter, means to create a set point signal based on a theoretical compressor parameter corresponding to one, of the sensed turbo compressor parameters and difference means for formulating the difference between the theoretical compressor parameter and the other of the turbo compressor parameters to formulate a control input signal, comprising: A controller including a proportional controller and an integral controller, said controller receiving said control input signal and outputting a control signal; limit means associated with said controller for receiving said control input signal and detecting when said control input signal exceeds a predetermined limit and for outputting a threshold signal representative of said control input signal passing said predetermined limit; and, signal former means, receiving said threshold signal and outputting a signal directly to said integral controller for changing the integral action of said integral controller.
Claim 6
Dependent Claim
186 words
In a turbo compressor control for use with a turbo compressor having an inlet connected to an upstream line and a outlet connected to a downstream line, with a first sensing means to sense a first turbo compressor parameter, and second sensing means to sense a second turbo compressor parameter, means to create a set point signal based on a theoretical compressor parameter corresponding to one, of the sensed turbo compressor parameters and difference means for formulating the difference between the theoretical compressor parameter and the other of the turbo compressor parameters to formulate a control input signal, comprising: A controller including a proportional controller and an integral controller, said controller receiving said control input signal and outputting a control signal; limit means associated with said controller for receiving said control input signal and detecting when said control input signal exceeds a predetermined limit and for outputting a threshold signal representative of said control input signal passing said predetermined limit; and, signal former means, receiving said threshold signal and outputting a signal directly to said integral controller for changing the integral action of said integral controller.
Claim 7
Dependent Claim
29 words
The turbo compressor control according to claim 4, wherein said means for augmenting the integral action of said integral controller includes changing the time constant of the integral controller.
References Cited (Backward Citations)
US3276674A
Cited
US4046490A
Cited
US4139328A
Cited
US4142838A
Cited
US4384818A
Cited
US4428194A
Cited
US4627788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |