Apparatus for determining the properties of a lubricant

Details Apparatus for determining the properties of a lubricant Apparatus for determining the properties of a lubricant

1979-07-11

1981-03-03

Myracle, Jerry W.

Measuring and testing

Frictional resistance, coefficient or characteristics

Lubricant testing

G01N 356

Patent

active

042533260

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 axial cylindrical roller bearing and the rotational speed to provide curves of the moment of friction as a function of speed and the lubricating film thickness as a function of speed.

REFERENCES:
patent: 2108580 (1938-02-01), Drake et al.
patent: 3785196 (1974-01-01), Smith
patent: 3823599 (1974-07-01), Litz et al.

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