Volume percentage variable magnetorheological fluid fan clutch

Abstract

The invention discloses a volume percentage variable magnetorheological fluid fan clutch which comprises a driving shaft, a driving cylinder, a left driven disc, a driven cylinder, a right driven disc and a driven shaft, wherein a driving disc is arranged in a chamber defined by the left driven disc, the driven cylinder and the right driven disc; a casing pipe is arranged on the left side of the driving disc; a shape memory alloy spring is arranged between the casing pipe and a connection disc; an inner magnetism isolating ring and an outer magnetism isolating ring are arranged on the right side of the driving disc; a magnet exciting coil is arranged in a coil groove; a filtering system is arranged on the right side of the driving disc; a working cavity is filled with a magnetorheological fluid; a fluid storage cavity is filled with a base fluid; an electric brush slip ring is arranged on the driving cylinder; the two poles of the electric brush slip ring are connected with the two ends of the magnet exciting coil respectively; and a shape memory alloy touch-piece switch is fixed to the driving cylinder. According to the volume percentage variable magnetorheological fluid fan clutch, output power can be adaptively adjusted, so that an automobile engine can work in an appropriate temperature range on all working conditions.

Description

technical field [0001] The invention relates to the technical field of automobile clutches, in particular to a variable volume percentage magneto-rheological fluid fan clutch. Background technique [0002] The working cycle of the car engine is carried out at high temperature. During the driving process of the car, due to the change of operating conditions and environmental conditions, the heating condition of the engine changes in real time, which requires the fan to automatically adjust the speed according to different working conditions, so that the engine Maintain an appropriate temperature range under all operating conditions. However, the two fan drive methods commonly used in automobiles have the following defects: the traditional drive method cannot make continuous real-time adjustment of the fan speed with temperature changes, which may easily cause unnecessary loss of engine power, excessive cooling, and increased noise; The driving mode (hydraulic type, motor-d...

AI Technical Summary

Problems solved by technology

However, the two fan drive methods commonly used in automobiles have the following defects: the traditional drive method cannot make continuous real-time adjustment of the fan speed with temperature changes, which may easily cause unnecessary loss of engine power, excessive cooling, and increased noise; The driving mode of speed adjustment (hydraulic type, motor-driven type) will make the cooling system more complicated

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