Magnetorheological fluid continuously variable transmission

Abstract

The invention discloses a magnetorheological fluid continuously variable transmission and belongs to the technical field of transmissions. The magnetorheological fluid continuously variable transmission comprises a magnetorheological fluid transmission device and a rotation speed adjusting circuit; and the rotation speed adjusting circuit comprises a rotation speed sensor, a magnet exciting coil, a voltage amplifier, a speed adjusting resistor R1, a resistive divider R2, a current limiting resistor R3, a resistor R4, a resistor R5, a filter capacitor C1, a negative feedback capacitor C2, a positive feedback capacitor C3, a transistor Q1, a Darlington transistor Q2, a fly-wheel diode D1, a voltage-regulator diode ZD1, a switch SW and a direct current power supply BAT. The magnetorheological fluid continuously variable transmission has the advantages of simple structure, small size, high reliability, strong stability, good effect of controlling rotation speed and high accuracy.

Description

technical field [0001] The invention relates to a continuously variable transmission, in particular to a magnetorheological fluid continuously variable transmission, which belongs to the technical field of transmissions. Background technique [0002] Magnetorheological fluid is a new type of smart material. Under the action of an external magnetic field, its rheological properties will change rapidly, and its viscosity can increase in a short time (millisecond level), and it will change from a liquid with good rheological properties to a liquid. It is similar to a solid state, and will return to a flowable liquid once the external magnetic field is lost. In recent years, due to its superior rheological properties, it has been used in soft start, clutch, brake, sealing and shock absorption, and has also begun to develop in the field of stepless speed regulation. US Patent US005779013, Torque transfer apparatus using magneto rheological fluids The transmission medium realize...

AI Technical Summary

Problems solved by technology

Domestic patent CN101793312A discloses a multi-disk magneto-rheological stepless transmission, which uses the magneto-rheological fluid in the gap between the active friction plate and the driven friction plate to transmit torque. It has a reasonable structure and high transmission power, but it cannot control the transmission. The rotational speed output by the shaft is arbitrary and blind, and cannot realize stepless speed change in the true sense

The patent number is ZL201120203829.3, and the name is a controllable continuously variable transmission system based on magnetorheological fluid. Although it solves the above problems well, its circuit configuration is large in size, high in cost, difficult to maintain, and its precision has certain limitations and is therefore greatly restricted in industrial applications

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