ORBITAL PUMP DEVICE WITH CROWNING FOR PUMPING LIQUID MEDIUM AND METHOD AND USE

• Main Authors: KUHNERT GERHARD, STENGEL PATRICK, DOLD CHRISTIAN, UEBERSOHN LARS
• Format: Patent
• Language: Chinese; English
• Published: 09.03.2021
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

In many pump types, in particular in orbital pumps, there is an optimization need with regard to the running characteristics, in particular with regard to parameters which relate to the delivery flow.What is provided is an orbital pump device (10) for delivering liquid medium by a rotational movement including a hydraulic housing (12) surrounding a hydraulic chamber (11) in a fluid-tight manner;at least one membrane unit (14) which is arranged inside the hydraulic chamber (11) in flat contact with an inner jacket surface of the hydraulic housing; and an inlet (7) and an outlet (9) provided in the hydraulic housing. At least one crowning (15) is provided at the inner jacket surface (13) and/or at the membrane unit (14) such that a radial gap (16) between the membrane unit and the inner jacket surface is defined by the crowning in a circumferential section of less than 360 DEG, and in particular less than 180 DEG. Therefore, stable conveying volume flow can be ensured. The invention also relates to a method and