Viscosity testing system for magnetorheological fluid and measuring method

Abstract

The invention discloses a viscosity testing system for magnetorheological fluid. The viscosity testing system comprises a measuring box, a supply box, a measuring beaker and an external magnetic fielddevice, wherein the measuring box is connected with the supply box by virtue of a liquid inlet pipe; a first valve is arranged on the liquid inlet pipe; the measuring box is connected with the measuring beaker by virtue of a liquid outlet pipe; a second valve is arranged on the liquid outlet pipe; the arrangement position of the supply box is higher than that of the measuring box. The method comprises the following steps: enabling magnetorheological fluid in the supply box to slowly flow into the measuring box by regulating the opening of the first valve and the second valve under different external magnetic field conditions, maintaining the liquid level of the magnetorheological fluid in the measuring box invariable, measuring the volume of the magnetorheological fluid flowing into the measuring beaker in a certain time, and further measuring the viscosity of the magnetorheological fluid. The system and the method disclosed by the invention are capable of accurately measuring the viscosity of the magnetorheological fluid under the effect of different magnetic field intensity, and are simple in structure, clear in principle, convenient to operate and wide in application range.

Description

technical field [0001] The invention belongs to the field of liquid viscosity measurement test, and relates to a magnetorheological liquid viscosity test system and a measurement method. Background technique [0002] Magneto-rheological fluid is a suspension formed by mixing tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and non-magnetic permeable liquid. Its main working principle is to change its viscosity according to the strength of the magnetic field. This kind of suspension exhibits low-viscosity Newtonian fluid characteristics under the condition of zero magnetic field; under the action of strong magnetic field, it presents high-viscosity, low-fluidity Bingham liquid characteristics; after the magnetic field is withdrawn, the magnetorheological fluid returns to Newtonian fluid characteristic suspension state. The process of changing from liquid to semi-solid and then from semi-solid to liquid is controllable and reversible, ...

AI Technical Summary

Problems solved by technology

At present, the test device has complex structure, inconvenient operation and serious magnetic flux leakage, which cause large measurement errors.

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