Patent ID: 9169838
Filing Date: 2015-10-27
Classification: F04C

Abstract:
1. A liquid ring vacuum pump having a gas with a liquid content, said liquid ring pump having a pump housing, and an impeller which is mounted eccentrically in the pump housing and operates at a rotational speed, and a vibration sensor for recording vibrations of the pump, characterized in that the pump comprises a logic module which compares a measured value of the vibration sensor with a predefined cavitation limiting value and which compares a measured value which represents the liquid content of the gas to be delivered with a first limiting value, a control unit being provided to adapt the rotational speed of the pump: i. the control unit reduces the rotational speed if the predefined cavitation threshold value has been exceeded and the liquid content lies below a predefined limiting value; ii. the control unit increases the rotational speed if the predefined cavitation threshold value has been exceeded and the liquid content lies above the predefined limiting value.