Research On Water-cooled Magnetorheological Fluid Clutch

As a new type of power transmission device,the magnetorheological fluid clutch has the advantages of small impact,strong anti-interference ability and easy control.The working state of the device can be changed by adjusting the excitation current,which is simple and easy to operate.It is an ideal transmission device.In this paper,the magnetorheological fluid clutch is studied from the following aspects:In this paper,the components of MR fluid and its rheological effect are described,the common constitutive model is introduced,and the model used in the design of MR fluid clutch is pointed out;the structure form and coil arrangement of Mr transmission device are analyzed,and on this basis,a new structure scheme of water-cooled multi barrel MR fluid clutch is proposed,and its working principle and heat dissipation channel are introduced At the same time,the magnetic resistance of the magnetic circuit is calculated,and the material and specific parameters of the clutch components are determined.In order to investigate the distribution of magnetic induction intensity in the designed clutch working area,the electromagnetic field simulation of clutch is carried out by using finite element software Maxwell,and the distribution law of magnetic field line and magnetic induction intensity is obtained.At the same time,the factors affecting the magnetic induction strength in the working area are analyzed.In order to study the distribution of clutch steady and transient temperature and temperature rise characteristics under different heat dissipation conditions,The results show that the temperature rise of clutch is faster under natural cooling condition and the temperature rise of magnetorheological fluid can be controlled effectively by water cooling.The clutch parts are processed and the prototype is assembled.The test bench is built.The data acquisition,communication control and PID speed control program of the test bench are written by using the upper computer Lab VIEW.The transmission performance and cooling and cooling effect of the designed clutch are tested.The influence of temperature rise on the clutch output torque is analyzed,and the control effect under different PID parameters is compared.The results show that the relative performance of the magnetorheological fluid clutch meets the design requirements.There are 80 figures,12 tables and 78 references in this paper.