Fluid-dynamic bearing system

US10424992B2 · kind B2 · utility

Assignee

• MINEBEA MITSUMI Inc. · JP

Inventors

• Michael Bruckhoff · Tennenbronn, DE
• Tobias Kirchmeier · St. Georgen, DE
• Olaf Winterhalter · Epfendorf, DE
• Andreas Kull · Hüfingen, DE
• Jorg Hoffmann · Katzenelnbogen, DE

Key dates

• Filing date: Oct 8, 2015
• Grant date: Sep 24, 2019
• Expiry date: Jan 1, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2370/12
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a fluid-dynamic bearing system, in particular for the rotary support of a spindle motor, the bearing system comprising: a first conical bearing and a second conical bearing counteracting the first conical bearing, a fixed shaft along which the two conical bearings are arranged, a sleeve, a first and a second conical bearing component, which together with the sleeve form the first and second conical bearings, bearing structures applied to the sleeve and/or the conical bearing components, a bearing gap filled with a bearing fluid extending between the sleeve and the shaft and between the sleeve and the conical bearing components and sealed at each of its ends by a conical capillary seal, and a hub which rotates together with the sleeve about a rotation axis. The invention is characterized in that a pump seal is arranged between the first conical bearing and the adjacent capillary seal.