Vane pump

US9765775B2 · kind B2 · utility

Assignee

• Hella KGaA Hueck & Co. · DE

Inventors

• Ingo Geue · Bad Sassendorf, DE
• Theodor Hüser · Geseke, DE
• Dennis Marburg · Lippstadt, DE
• Udo Schubert · Paderborn, DE
• Thomas Valeiras · Lippstadt, DE

Key dates

• Filing date: Sep 8, 2014
• Grant date: Sep 19, 2017
• Expiry date: Dec 9, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2250/301
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A vane pump with a pump housing in which a cam ring is constructed or arranged, and wherein a rotor is provided that is mounted in the cam ring so that it can rotate about a rotational axis , wherein the cam ring has an inner contour with a variable radius that varies between a maximum radius and a minimum radius in the circumferential direction about the rotational axis , wherein, in the radial gap between the inner contour and the rotor , a number of lift sections is constructed with pump chambers constructed in these sections, and wherein vane elements are mounted on the rotor , wherein these elements slide against the inner contour of the cam ring and limit the pump chambers in the circumferential direction. According to the invention, the radius of the inner contour varies about the rotational axis according to the function: r=r0+a·sin(n·φ), where r0=(rmax+rmin)/2, a =(rmax−rmin)/2, and φ=phase angle of the radius (r) between (rmin) and (rmax) in the direction of rotation of the rotor .