Apparatus for determining the properties of a lubricant

US4253326A · kind A · utility

Assignee

• SKF Kugellagerfabriken GmbH · DE

Inventors

• Hermann Munnich · Bad Kissingen, DE
• Hermann Glockner · Schweinfurt, DE

Key dates

• Filing date: Jul 11, 1979
• Grant date: Mar 3, 1981
• Expiry date: Jul 11, 1999

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Apparatus for determining the properties of lubricants which is of comparatively simplified construction and is capable of analyzing the properties of a lubricant in a relatively short period of time with a relatively small quantity of lubricant in a highly accurate manner. The apparatus comprises an axial cylindrical roller bearing supported on the frame of the apparatus by a hydrostatic cushion. The apparatus includes a disc member which supports the housing disc of the axial cylindrical roller bearing which is engaged by a leaf spring equipped with a resistant strain gauge for measuring the moment of friction. A bell-shaped top lies on the spindle disc of the axial cylindrical roller bearing and is rotated by motor with an infinitely variable drive to which a tachometer is connected by a distance gauge arranged between the disc member and the bell-shaped top which measures a change in the distance of the contact surface of the axial cylindrical roller bearings and consequently the lubricant film thickness. The apparatus includes, in the present instance, two recorders for converting the measuring impulses of the moment of friction, the distance of the contact surfaces of the axi…