| 摘要 |
A method and test apparatus for measuring the frictional properties of a fluid comprises; a first specimen holder (10, fig. 1) which is adapted to hold a first specimen (13, fig. 1) in the fluid being tested in contact with a second specimen surface of a second specimen (14, fig. 1) in a second specimen holder (15, fig. 1), with means for applying a measurable load between the two specimens, and with oscillatory driving means for oscillating at least one of the specimen holders along a first direction, and a motion inducing means, for inducing a motion between the first and second specimen holders in a second direction. Optionally, the first specimen holder is connected to a shaft or push rod 9 which is induced to move in the first direction, which is the direction of the length of the shaft. Optionally, the motion inducing means for inducing a motion in a second direction is an off-centre counter weight 27 located on the shaft 9. |
