Abstract:
Die Erfindung betrifft ein Ventilbaukastensystem mit elektromagnetisch betätigtem Ventil (I, II, III, IV, V), wobei das Ventil einen Magnetteil (1) und über eine Verbindungsstelle (32) ein auf der Stirnseite und in Hubrichtung des Magnetteiles (1) aufgesetztes Ventilteil (9) umfasst, das Magnetteil einen in einer axialen Bohrung (2) angeordneten und axial verschiebbaren Anker (3) mit in Hubrichtung angeschlossenem Betätigungselement (4) aufweist, und die Hubbewegung des Ankers (3) durch ein magnetisches Feld erzeugt wird, das durch eine Magnetspule (5) über einen Pol (12) mit Steuerkonus (6), den Anker (3) und ein flussführenden Gehäuse (7) des Magnetteiles (1) mit Joch (8) geschlossen ist, und die Verbindungsstelle (32) zum Ventilteil (9) eine vorgegebene Verbindungskontur aufweist, mit der unterschiedliche Baugruppen für Ventilfunktionen angeschlossen werden können. Die Erfindung ist dadurch gekennzeichnet, dass die Verbindungsstelle (32) zum Magnetteil (1) den Pol (12) mit dem Steuerkonus (6) umfasst, wobei der Steuerkonus (6) so gestaltet ist, dass eine vorgegebene Kraft - Hub - Kennlinie zustande kommt, mit der Hubarbeit erreicht wird, die durch die Abmessungen des Ankers (3), Joches (8) und der Magnetspule (5) für unterschiedliche Ventilteile (9) vorgegeben ist.
Abstract:
The disclosed embodiments include a force actuated modulating control valve such as a direct acting solenoid valve or pilot actuated bellows valve with a knife edge seat so that the metering location on the seat is at the very outer diameter. In one embodiment, a portion of the valve seat outside of the metering edge is removed to substantially the outside diameter to reduce contact with high velocity fluid flow. In certain embodiments, a flow shield may be positioned just outside of the metering edge of the seat to prevent the high velocity fluid from circulating toward parts of the spool assembly. In some embodiments, the flow shield may be fixed to the body of the instrument so all fluid forces are transmitted to the body. Embodiments of the force actuated modulating control valve may be employed in a mass flow controller for controlling fluid flow.
Abstract:
In a 4/3 way magnetic valve with spring-centered basic position 0, a pulsed current of relatively high frequency, e.g. a frequency fi of 10 kHz, flows through each of the two exciter coils (18 and 19) for setting the alternate excited function positions I and II and for setting defined flow cross-sections in these functions positions. These pulsed direct currents undergo square-amplitude modulation so that current flows through the exciter coils alternately for time-intervals T1 and T2. The frequency of this amplitude modulation, whose period T is equal to the sum of the excitation time-intervals, T1 and T2, of the two exciter coils, is approximately 400 Hz. The magnetic valve (10) has a central position (69) rigidly mounted in the housing and a mobile valve element in the form of a soft iron sleeve (68) which is also the armature of the double-stroke magnetic system (17). The function position and deflection of the armature are chosen in function of the ratio T1/T2 of the time-intervals for which current flows alternately through the exciter coils (18 and 19).
Abstract:
A method for characterizing a fluid control solenoid with current compensation is described. A current command is sent to the fluid control solenoid. The current command indicates a desired current value related to a desired fluid output pressure to be applied to the solenoid. An actual fluid output pressure is measured at a valve associated with the fluid control solenoid for the desired current value applied to the solenoid. An actual current received value at the fluid control solenoid is also measured. Post processing is then applied. A compensated current value related to the actual fluid output pressure is determined based on a difference between the current command and the actual current received value. Methods for dynamic current compensation are also described.
Abstract:
A solenoid operated valve and method of assembly characterized by a threaded connection between the pole piece (69) and the cage (11), the threaded connection (75)ncluding a first threaded connecting portion fixed in relation to the pole piece and a second threaded connecting portion fixed in relation to the cage and in threaded engagement with the first threaded portion such that relative rotation of the first and second threaded portions would vary the axial spacing between the proximal end of the pole piece and the valve seat (38) over a range of adjustment; and an anti-rotation device interposed between the first and second threaded connecting portions for locking the first and second threaded connecting portions against relative rotation to fix the axial spacing between the proximal end of the pole piece and the valve seat within such range of adjustment, which axial spacing regulates the maximum pressure that can be supplied to the control port (25).
Abstract:
A solenoid operated valve and method of assembly characterized by a threaded connection between the pole piece and the cage, the threaded connection including a first threaded connecting portion fixed in relation to the pole piece and a second threaded connecting portion fixed in relation to the cage and in threaded engagement with the first threaded portion such that relative rotation of the first and second threaded portions would vary the axial spacing between the proximal end of the pole piece and the valve seat over a range of adjustment; and an anti-rotation device interposed between the first and second threaded connecting portions for locking the first and second threaded connecting portions against relative rotation to fix the axial spacing between the proximal end of the pole piece and the valve seat within such range of adjustment, which axial spacing regulates the maximum pressure that can be supplied to the control port. Other unique design features also are disclosed.