Friction testing apparatus for oscillating at least one specimen in contact with another
First Claim
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1. A test apparatus comprising:
- a first specimen holder which is adapted to hold a first specimen such that a surface of the said specimen is in contact with a second specimen, in a second specimen holder;
means for applying a measurable load between the specimens;
oscillatory driving means for oscillating at least one of the specimen holders along a direction substantially perpendicular to a line of contact between the specimens, said oscillating driving means comprising an electromagnetic vibrator and a stiffness adjusting means, the first and second specimen being electrically insulated from each other when they are not in contact; and
means for measurement of electrical resistance between the test specimens.
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Abstract
The invention relates to a test apparatus for carrying out analysis on fluids or components comprising two specimens which are movable with respect to each other by means of an oscillating driving means. Means are provided for applying a measurable load between the two specimens. The oscillating driving means further comprises a stiffness adjusting means in order to control the degree of lateral movement of the oscillating driving means. The test apparatus also comprises a force measuring means which is connected to a support which is relatively much heavier than the oscillating driving means and the specimens in order that accurate results are achieved.
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Citations
20 Claims
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1. A test apparatus comprising:
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a first specimen holder which is adapted to hold a first specimen such that a surface of the said specimen is in contact with a second specimen, in a second specimen holder; means for applying a measurable load between the specimens; oscillatory driving means for oscillating at least one of the specimen holders along a direction substantially perpendicular to a line of contact between the specimens, said oscillating driving means comprising an electromagnetic vibrator and a stiffness adjusting means, the first and second specimen being electrically insulated from each other when they are not in contact; and means for measurement of electrical resistance between the test specimens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A test apparatus designed to stimulate the conditions of operation of a mechanical device having moving parts, such as for example a pump, for the purposes of determining the extent of wear on the moving parts comprising:
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a first specimen holder which is adapted to hold a first specimen such that a surface of the said specimen is in contact with a second specimen, in a second specimen holder, means for applying a measurable load between the two specimens, said test apparatus also comprising oscillatory driving means for oscillating and connected to at least one of the specimen holders along a direction substantially perpendicular to the line of contact between the specimens, wherein said oscillating driving means comprises an electromagnetic vibrator and wherein the oscillating driving means further comprises a stiffness adjusting means. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification