Apparatus for measuring anti-wear properties of pressurized liquids
AssigneeThe United States of America as represented by the Secretary of the Army
InventorAbraham Mertwoy
Life of this patent
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Abstract
A testing device for determining the lubrication properties of hydraulic ids under elevated pressures and temperatures comprises a pressure-tight housing defining a central cavity including a continuous passageway for the fluid, a chuck assembly located within the cavity which holds a plurality of test balls in fixed position, a rotatable support structure securing an upper ball in centrally disposed contact with the test balls, and a screw-threaded adjustment adapted to move the chuck assembly to apply pressure between the test balls and the upper ball. The present testing device is of simple and inexpensive construction and reduced size, and provides data respecting the test fluids which accurately reflects actual working conditions.
Claims9
A testing device for determining the lubricity or anti-wear resistance characteristics of hydraulic fluids under elevated fluid pressures and temperatures, comprising:
- a housing having an open end and a cavity therein including a continuous passageway for said fluids;
- a cover removably mounted on said housing in pressure-tight engagement with said open end;
- a fluid inlet and a fluid outlet, said fluid inlet connected with said continuous passageway to permit the flow of pressurized fluids in said housing;
- a plurality of test balls held stationary within said housing;
- an upper ball rotatably mounted in contact with each of said test balls;
- a chuck assembly disposed within said cavity adapted to fixedly retain said test balls and to axially reciprocate toward said upper ball;
- means for rotatably supporting said upper ball in axial alignment within said test balls;
- means associated with said chuck assembly for applying pressure between said test balls and said upper ball which includes;
- and adjustable calibrated spring assembly communicating with said chuck assembly and adapted to urge said test balls into pressured contact with said upper ball;
- and
- means associated with said upper ball supporting means for rotating said upper ball in contact with said test balls.
Dependencies are inferred from the claim text.