Controlling a vacuum system comprising a vacuum generator arrangement
AssigneePiab Aktiebolag
InventorsDaniel Söderman, Simon Ahlin Högfeldt, Gustaf Wigren
Life of this patent
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Abstract
A vacuum system (10) and method (100) used for creating a dynamically controlled vacuum system (10) for lifting processes (Wc) are disclosed. The compressed air used for an ejector (3) is varied by calculating the required vacuum levels (V−) during the lifting process (Wc). This reduces the air consumption.
Claims14
A method for automatic pressure level adaptation enabling energy saving in a lifting process (Wc) in a vacuum system operating a vacuum lifter for transportation of objects (O), said vacuum system comprises a vacuum generator arrangement driven by a compressed air flow (P), wherein the vacuum generator arrangement via a vacuum chamber being part of the vacuum system is arranged to be brought in flow connection with the vacuum lifter, in order to supply vacuum to the vacuum lifter in result of the compressed air flow (P), wherein a pressure sensor for monitoring a system-pressure p{circumflex over ( )}−(t) over time is arranged inside the vacuum chamber;
- and a vacuum system controller possibly being electrically connected to a main controller, wherein the vacuum system controller is arranged to control and communicate with the vacuum generator arrangement and communicate with the pressure sensor, and the vacuum system controller is arranged to monitor the measured system-pressure p{circumflex over ( )}−(t) over a number of monitored points, wherein adjusting a required vacuum level (P-) during a complete lifting process (Wc) required to hold on to the object (O) for each monitored point (Pmon) during the complete lifting process (Wc), wherein the method comprises the step of:
- measuring an acceleration (Oacc) of the object being moved by the vacuum lifter.
A system for automatic pressure level adaptation enabling energy saving in a lifting process (Wc) in a vacuum system operating a vacuum lifter for transportation of objects (O), said vacuum system comprises a vacuum generator arrangement driven by a compressed air flow (P), wherein the vacuum generator arrangement via a vacuum chamber being part of the vacuum system is arranged to be brought in flow connection with the vacuum lifter, in order to supply vacuum to the vacuum lifter in result of the compressed air flow (P), wherein a pressure sensor for monitoring a system-pressure p−(t) is arranged inside the vacuum chamber;
- and a vacuum system controller possibly being electrically connected to a main controller, wherein the vacuum system controller is arranged to control and communicate with the vacuum generator arrangement and communicate with the pressure sensor, and the vacuum system controller is arranged to monitor the measured system-pressure p−(t) over a number of monitored points, wherein the controller is arranged to adjust a required vacuum level (P−) during a complete lifting process (Wc) required to hold on to the object (O) for each monitored point (Pmon) during the lifting process (Wc), wherein the vacuum system controller is arranged to measure an acceleration (Oacc) of the object being moved by the vacuum lifter.
Dependencies are inferred from the claim text.