| 摘要 |
The invention relates to the technical field of oscillating piston volumetric fluid meters. The meter comprises a cylindrical measuring chamber including a lateral wall ( 2 ), a bottom ( 1 ) and a lid ( 3 ), a lower cylinder ( 4 ) and an upper cylinder ( 5 ) having the same diameter, which is less than the diameter of said chamber, an inlet orifice and an outlet orifice ( 8 ) for respectively admitting fluid to and evacuating fluid from said chamber, a cylindrical piston ( 11 ) disposed eccentrically and guided kinematically in said chamber and effecting an oscillatory movement in said chamber ( 30 ) as a result of the displacement of a volume of fluid, and a fixed partition ( 9 ) between said inlet orifice and said outlet orifice ( 8 ), lying radially between said lateral wall ( 2 ) and said lower and upper cylinders ( 4, 5 ), and lying axially between said bottom ( 1 ) and said lid ( 3 ), said lateral wall ( 2 ) including a vertical cavity ( 16 ) in the vicinity of said fixed partition ( 9 ). Said cavity ( 16 ) is separate from said inlet and outlet orifices and passes through said lateral wall ( 2 ) at least partly within the height of said wall.
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