Valve for a magnetorheological liquid

摘要

A valve for a magnetorheological fluid is formed with a duct through which the magnetorheological fluid can flow and which can be exposed to a variable magnetic field such that the flow resistance of the duct can be set using the magnetic field in the duct. The magnetic field can be lastingly generated using a magnet device that is made at least in part of magnetically hard material. The magnetization of the magnet device can be lastingly modified by a magnetic pulse of a magnetic field generation device in order to lastingly change the magnetic field in the duct and thus the flow resistance of the duct. A valve of the invention requires energy only to change settings while a specific setting can be lastingly maintained without supplying energy.

主权项

1. A valve for a magnetorheological fluid, comprising:
at least one flow duct for conducting a flow of the magnetorheological fluid therethrough; a magnetic device disposed to subject said at least one flow duct to a variable magnetic field, to set a flow resistance in said at least one flow duct by way of the magnetic field in the flow duct; said magnetic device being composed at least partially of hard-magnetic material for generating a permanent magnetic field; a magnetic field generation device configured for generating magnetic pulses and disposed for varying a permanent magnetization of said magnetic device lastingly with at least one magnetic pulse, in order to lastingly vary the magnetic field acting in the flow duct and the flow resistance of said at least one flow duct.