Fluid parameter measurement device with annular gap

Abstract

Disclosed is a fluid parameter measurement device with an annular gap, including a base, a core column, and a swing block. The base is fixed to the core column and pivot-connected to the swing block. The core column penetrates a through hole in the swing block, sealed at both ends with elastic sealing rings to form an annular gap between a wall of the core column and that of the through hole. The core column contains fluid inlet and outlet channels connecting both ends of the annular gap, directing pressurized liquid through the annular gap. An adjustment assembly on the base alters core column-to-through hole concentricity while maintaining parallelism, enabling flow measurement under varying pressures or at constant pressure with adjustable eccentricity. The design simplifies experimental operations through precise concentricity regulation and eccentricity-based gap state control.