Method for determining the functional relation of several pumps

摘要

A method for determining the functional relationship of several pumps which are controllable in their rotational speed, in a hydraulic installation. At least one pump is activated with a changed rotational speed, and at least one functional relationship of the installation is determined from the hydraulic reactions. With a suitable selection of the control and detection of the hydraulic changes, one may determine the functional relationship of the complete installation.

主权项

1. A method for determining functional relationships between pumps controlled by a digital frequency converter in an installation, the pumps being controllable with regard to their rotational speed, wherein rotational speed of at least one pump is changed, and at least one functional relationship of the installation is determined from a hydraulic reaction resulting therefrom, the method comprising:
a) activating all of the pumps with a constant rotational speed, and detecting, using sensors, a single hydraulic variable for each pump or a consumer or group of consumers being assigned to a respective pump; b) activating in each case at least one of the pumps in a successive manner with a changed rotational speed compared to step a), and detecting, using the sensors, the respective resulting changes to the hydraulic variable for each pump or each consumer or group of consumers assigned to a respective pump; and c) determining, via electronics of the digital frequency converter, an assignment of the pumps or pump groups to the consumers or groups of consumers by the hydraulic variable changes detected by the sensors.