Electrorheological fluid flow mode rheological property test device

Abstract

The invention discloses an electrorheological fluid flow mode rheological property testing device, which includes an anode electrode cylinder and a cathode electrode cylinder arranged coaxially along the inside and outside. The gap between the anode electrode cylinder and the cathode electrode cylinder forms an annular gap, and two annular pistons are connected with the anode electrode cylinder. The inner and outer walls of the annular gap together form a chamber for accommodating electrorheological fluid. Under the action of the driving mechanism, the two annular pistons can move back and forth synchronously in the annular gap, thus driving the electrorheological fluid in the chamber to synchronize Move; the radial uniform electric field generated after the anode electrode cylinder and cathode electrode cylinder are connected to the external power supply can vertically pass through the entire annular gap; there are two sensor installation holes and at least one exhaust bolt hole on the outside of the cathode electrode cylinder. A pressure sensor is installed at each sensor installation hole, and an exhaust bolt is installed at the exhaust bolt hole. Advantages of the present invention: It provides a rheological property testing scheme under the flow mode of electrorheological fluid, ensuring the accuracy of testing.

Description

Technical field [0001] The invention relates to the field of electrorheological fluid rheological property testing, and in particular to an electrorheological fluid flow mode rheological property testing device. Background technique [0002] Electrorheological fluid is a controllable smart material composed of dielectric particles mixed with an insulating liquid. It has good fluidity when there is no electric field and is a low-viscosity Newtonian fluid. Under the action of an external electric field, the solid particles in the electrorheological fluid are induced by the electric field and exhibit Bingham characteristics of high viscosity and low fluidity. Electrorheological fluids have been used in vibration control, mechanical transmission, automation and other fields. [0003] Measuring the shear yield stress and response time properties of electrorheological fluids is of great significance to the design and control methods of electrorheological devices. Electrorheologi...

AI Technical Summary

Problems solved by technology

In the shear mode, the electrorheological fluid will be affected by centrifugation, and the measured results are not accurate, which means that the current testing technology is actually unable to measure the high shear rate of the electrorheological fluid

Although the measuring device for rheological properties of the plate type electrorheological fluid can avoid the influence of centrifugation on the experimental results, its working mode is still the shear mode; the working mode of the measuring device for the rheological properties of the plunger type electrorheological fluid is flow mode and shear mode. Mode mixing; although the working mode of the cylinder-type electrorheological fluid rheological property measuring device is the flow mode, it is the same as the plunger-type electrorheological fluid measuring device, only part of the electrorheological fluid is placed in the electric field, and there are suspended particles in the electrorheological fluid Aggregation and mother liquor outflow accumulation phenomenon, resulting in inaccurate test results

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