Cross plate type viscosity measuring device and measuring method for magnetorheological fluid

Abstract

The invention relates to a cross plate type viscosity measuring device and a measuring method for magnetorheological fluid. The device comprises a magnetorheological fluid working cylinder with a cylinder cover, a cross plate head, a shaft lever, a numerical control motor, a temperature sensor, a fixed supporting plate frame, a torque tester, a rotating speed sensor and a data acquisition controlsystem; the magnetorheological fluid working cylinder is used for filling with the magnetorheological fluid to be measured, the cross plate head is connected with the numerical control motor through ashaft rod, and is completely immersed in the magnetorheological fluid to be measured, the numerical control motor is fixed on the cylinder cover through the fixed supporting plate frame, the temperature sensor is arranged on the inner wall of the inner layer of the working cylinder and connected with the data acquisition control system through wires, the torque tester and the rotation speed sensor respectively collect torque and rotating speed of the numerical control motor and send the torque and the rotating speed of the numerical control motor to the data acquisition control system. The measuring method obtains the viscosity of the magnetorheological fluid at different magnetic intensity by calculating a viscosity and shear yield strength formula. The cross plate type viscosity measuring device is simple in structure, the measuring method is convenient to operate, and measurement result is accurate.

Description

technical field [0001] The invention belongs to the technical field of magnetorheological research equipment, and relates to a cross plate type magnetorheological liquid viscosity measuring device and a measuring method. Background technique [0002] Magnetorheological fluid is a suspension formed by mixing tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and non-magnetic 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magnetic field, it presents high-viscosity, low-fluidity Bingham liquid characteristics; after the magnetic field is withdrawn, the magnetorheological fluid returns to Newtonian fluid characteristic suspension state.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 contro...

AI Technical Summary

Problems solved by technology

Because the magnetorheological fluid is affected by the magnetic field and temperature, the current test device has a complex structure, inconvenient operation, and serious magnetic flux leakage, resulting in large measurement errors.

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