Method of regulation that prevents surge in a turbocompressor by initiating blow-off when necessary
US4936741A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Mar 9, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D27/0207
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A regulating method for preventing surges in a turbocompressor by initiating blow-off when necessary during operation. Flow to the turbocompressor and the compressor outlet pressure are measured continuously, and a first regulating difference is calculated from these measurements. This first regulating difference is then applied as an input parameter to a regulator which has a limited response rate. The output of this regulator is then used as a regulating parameter for a blow-off valve. The blow-off valve is opened rapidly by safety controls under malfunctioning conditions that tend to stress the limited response rate of the regulator. A second regulating difference is calculated from the preceding measurements or from the first regulating difference to indicate the need to open rapidly the blow-off valve. The calculation of the second regulating difference is carried out with predetermined reference values, and this calculated second regulating difference is applied to a threshold stage which emits a rapid-opening parameter when the second regulating difference exceeds a predetermined threshold stored in that threshold stage. The rapid-opening parameter is forwarded to the regula…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.