Free jet centrifuge

US6354987B1 · kind B1 · utility

Assignee

• Filterwerk Mann & Hummel GmbH · DE

Inventors

• Peter Frehland · Ditzingen, DE
• Helmut Fischer · Calw, DE

Key dates

• Filing date: Oct 13, 2000
• Grant date: Mar 12, 2002
• Expiry date: Oct 13, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01M2013/0422
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A free jet centrifuge, especially for cleaning the lubricating oil of an internal combustion engine. The aim of the invention is to provide a centrifuge which is economical to manufacture and at the same time allows for high speeds. To this end on one side of the rotor a ball bearing (16) is provided in the housing which engages a closed stub shaft (14) of the rotor. In the area of this bearing the rotor is sealed so that friction in the ball bearing is not increased by the oil pressure in the centrifuge. A friction bearing is provided for the other side of the rotor which is composed of a slide bushing (20) and a bearing bushing (21). In this way a combination of materials which is optimal in terms of tribological properties can be selected. A hollow nipple shaft (19) which acts as an oil inlet (24) for the centrifuge rotor is inserted into the slide bushing (20). To increase speed even further, the invention provides for an impulse channel (30) which discharges through nozzles (31). This device is integrated into a plastic base of the rotor (13) which permits the production of highly precise drive nozzles (31).