초록 ▼

A diaphragm operated valve assembly is controlled jby an electromagnetic valve assembly. A flat disc armature, which forms part of a flux path, is operable in an inner chamber to modulate the flow between the inner chamber and an exit port in response to an applied magnetic force. The level of the e

A diaphragm operated valve assembly is controlled jby an electromagnetic valve assembly. A flat disc armature, which forms part of a flux path, is operable in an inner chamber to modulate the flow between the inner chamber and an exit port in response to an applied magnetic force. The level of the effective magnetic force is a function of the armature mass, and the pressure acting on the disc surface. A pole piece adjacent to the flat disc armature is slidably adjustable to establish a specified force to actuate the armature to the closed or sealing position. This specified force is proportional to the current flow through the winding of the electromagnetic valve assembly. Thus the armature operates to seal communication between the inner chamber and the exit port at a given pressure differential as a function of current flow. The travel distance between the armature and a nonmagnetic seal seat has been minimized by spring biasing the armature in proximity to the seal seat.

대표청구항 ▼

An electromechanical valve apparatus comprising: an electrical winding defining a central flux axis; a magnetic flux circuit defining a flux path comprising a plurality of adjacent magnetic segments, including a generally cylindrical center segment which defines a fluid passage of predetermined cros

An electromechanical valve apparatus comprising: an electrical winding defining a central flux axis; a magnetic flux circuit defining a flux path comprising a plurality of adjacent magnetic segments, including a generally cylindrical center segment which defines a fluid passage of predetermined cross sectional area aligned with said flux axis, and outer segment, and an end segment adjacent a first end of said fluid passage, at least one of said segments being physically translatable within said valve apparatus along said flux path relative to an adjacent segment to adjust the portion of one of said segments that is in said flux path and the extent of an air gap between the translatable segment and the adjacent segment; an annular non-magnetic seat member having a central opening aligned with, and disposed near the other end of, the fluid passage; magnetic closure means comprising one of said segments and positioned adjacent the non-magnetic seat to define a fluid opening, said fluid opening being substantially less than said cross sectional area for operating positions of said closure means; means defining a cylindrical guide adjacent said non-magnetic seat member to receive said magnetic closure means and to constrain the motion thereof substantially parallel to the longitudinal axis of said fluid passage between a position against said annular non-magnetic seat member and a position displaced therefrom; means defining a fluid chamber communicating with said fluid passage through said fluid opening and enclosing said closure means; fluid conduit means having a first end extending from said chamber whereby a differential fluid pressure can be applied between said other end of said fluid passage and the other end of said fluid conduit means; and means for accessing the relative pressure in said chamber, said closure means forming a part of said flux circuit such that fluid flow urged by a predetermined pressure difference through the fluid passage and seat member central opening and against the closure means can be modulated by varying the energization level of the electrical winding, translation of the adjustable segment along said flux path being effective to vary the portion of one of said segments in said flux path and the air gap distance and thus vary the reluctance of the flux circuit, to correspondingly adjust the response of the valve assembly for a given energization level of the electrical winding to provide a given pressure difference.