| Magnetorheological fluid and shape memory alloy are new intelligent materials.Its mechanical properties are continuously controlled by external factors such as thermal field or magnetic field.Its outstanding mechanical properties and broad prospects have prompted many scholars at home and abroad to study and analyze the two materials and their applications.Based on MRF under the effect of external factors as well as the rheological characteristics of shape memory alloy under certain conditions the shape memory effect,puts forward the resistance of shape memory alloy and magnetorheological joint transmission method,conducted on the transmission mechanism of the joint transmission,the transmission structure,the design principle and related test methods of exploration,for the development of simple structure,fast response speed,reliable operation,easy to automatic control,security,environmental protection,energy saving,long service life of new intelligent transmission device to lay a certain foundation,It is hoped to provide a new idea for the development and research of shape memory alloy and magnetorheological fluid in the field of transmission engineering.The main research work of this paper is as follows:1)The thermal effect characteristics of shape memory alloy,the composition and preparation of magnetorheological fluid and the mechanism of magnetorheological effect were introduced.The relationship between the viscosity of magnetorheological fluid and yield stress with temperature was investigated.2)Analyzes the resistance of shape memory alloy with magnetorheological transmission principle and working process,thermal effect was deduced under the shape memory alloy driven MRF and slider friction joint transmission torque equation,established a joint transmission torque and magnetic field intensity,temperature,speed,material properties,the relation between parameters such as structure size.3)The working mode of magnetorheological fluid is introduced,and the torque equation of magnetorheological fluid transfer in cylinder and disk is derived based on the shear mode.Meanwhile,the friction sliding block auxiliary transmission in this device is analyzed,and the mathematical model is established.Based on the connection between transmission and braking,the braking performance of the braking device is analyzed.4)Resistance based on shape memory alloy with MRF gearing transmission characteristics of the transfer performance of the device are analyzed,and the thermal effect is deduced under the shape memory alloy driven MRF and slider friction joint transmission torque equation,set up a joint transmission torque and magnetic field intensity temperature speed of the relation between material characteristic parameters such as structure size.5)Based on the working principle of combined transmission,the magneto-rheological transmission of cylinder and disk and the auxiliary transmission of resistance shape memory alloy spring are designed and analyzed.6)The driving force experiment of resistance shape memory alloy spring was carried out,and the correctness of the driving force model of resistance shape memory alloy spring was verified by comparing and analyzing the data of theoretical value and experimental value.At the same time,the transmission performance of the magnetorheological fluid and the correctness of the torque equation of the magnetorheological fluid transmission are verified. |
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