Control system for a vacuum pump used for removing liquid and a method of controlling said pump
US6592340B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2000 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Dec 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control system for a vacuum pump used for removing liquid from a suction washer of a pulp mill includes a pump with adjustable rotation speed and means for defining the operating point of the vacuum pump and a control/central unit wherein the performance chart of the vacuum pump is recorded and wherein the defining data of the vacuum pump operating point is fed. The control system further includes a resistance function on the suction side of the vacuum pump which depicts the suction resistance formed of at least the suction object in the suction side. The resistance function is determined by changing the rotational speed of the vacuum pump and recording the operating points in the control/central unit at various rotational speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.