Patent ID: 9109970
Filing Date: 2015-08-18
Classification: B60T,F04C,G01L

Abstract:
1. A method for circuit separation testing in a double gearwheel pump, comprising: closing a pump outlet of a first gearwheel pump of two gearwheel pumps arranged in a pump casing to build up pressure in the first gearwheel pump, the gearwheel pumps having a common pump shaft that passes rotatably and in a sealed manner through a partition wall arranged between the two gearwheel pumps; after the pressure buildup, closing a pump inlet of the first gearwheel pump; closing a pump inlet and a pump outlet of a second gearwheel pump of the two gearwheel pumps; and testing a pressure in the second gearwheel pump to determine whether the pressure in the second gearwheel pump rises.