초록 ▼

A solenoid valve having an exciter coil is formed with a central passage for guiding an armature of a permanently magnetic material which is polarized in the direction of its axial movement. At the other end of the passage there is provided a tubular core of a magnetically soft material which acts a

A solenoid valve having an exciter coil is formed with a central passage for guiding an armature of a permanently magnetic material which is polarized in the direction of its axial movement. At the other end of the passage there is provided a tubular core of a magnetically soft material which acts as a mechanical limit stop for the armature and is also shaped as a valve seat controlled by the end face of the armature. An outer magnetically conductive member is arranged at the other end of the coil around the armature and is spaced from the latter by an air gap so as to act as a magnetic holding member for the armature when the coil is energized and the armature is displaced to its working position away from the stop member. Thus at least the end of the armature which faces the valve seat is provided with a frustoconical attachment having on its periphery a plurality of guiding fingers. The tip of the attachment controls the valve seat while the fingers permit the flow of a fluid past the armature.

대표청구항 ▼

A solenoid valve, including an exciter coil and an armature in the form of a permanently magnetic bar which is coaxially movable in said coil and polarized in the direction of its axial movement, comprising a first magnetic flux conducting member of a soft magnetic material which is inserted partial

A solenoid valve, including an exciter coil and an armature in the form of a permanently magnetic bar which is coaxially movable in said coil and polarized in the direction of its axial movement, comprising a first magnetic flux conducting member of a soft magnetic material which is inserted partially into said coil to form a limit stop for a rest position of the armature, a second magnetic flux conducting member of a soft magnetic material adjoining said coil in the range of movement of the armature and being spaced from the armature by an air gap, the cross-section of said second magnetic flux conducting member when viewed in the direction of movement of the armature, being in the range of said air gap shorter than the axial dimension of the armature to close magnetic force lines holding said armature in said rest position when said coil is deenergized; at least one valve seat facing an end face of the armature, an annular magnetically conductive piece having on its periphery a plurality of clamping fingers attached to a peripheral portion of the armature, and a valving element of a non-magnetic material held in position on said end face and projecting through said annular piece to cooperate with said valve seat.