Elastic piece, nonlinear force generation structure and electromagnetic valve

Abstract

The invention provides an elastic piece, a nonlinear force generation structure and an electromagnetic valve, and relates to the technical field of electromagnetic valves. The elastic piece is provided with a first through hole, and a kidney-shaped hole is formed along the edge of the first through hole. The nonlinear force generating structure comprises the elastic sheet and further comprises a movable iron core, wherein the elastic sheet is arranged on the movable iron core in a sleeving mode through the first through hole; the limiting piece is provided with a limiting surface, and the limiting surface abuts against the elastic piece; after the movable iron core is subjected to electromagnetic force, the movable iron core can drive the elastic piece to deform along the side close to the limiting face till the electromagnetic force borne by the movable iron core is equal to the elastic force generated by deformation of the elastic piece. The electromagnetic valve comprises the nonlinear force generating structure. As the limiting piece is provided with the limiting surface, the elastic piece is limited during deformation, and the elastic force generated during deformation of the elastic piece and the displacement amount of the movable iron core are in a nonlinear relationship.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic valves, and in particular relates to a shrapnel, a nonlinear force generating structure and an electromagnetic valve. Background technique [0002] The solenoid valve is not only the interface between the electrical control part and the pneumatic (hydraulic) actuator part, but also the interface of the gas (liquid) source system. The main working principle of the solenoid valve is to use the electromagnetic force generated by the electromagnetic coil to overcome the elastic force generated by the shrapnel, to push the valve core to move, and to realize the switch or flow control of the gas (liquid) flow. [0003] The Chinese utility model patent with the notification number CN210920202U discloses a solenoid valve, including coils, movable iron cores, iron core springs and other components. In this scheme, the elastic force generated by the iron core springs and the displacement of the mova...

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Problems solved by technology

[0003] The Chinese utility model patent with the notification number CN210920202U discloses a solenoid valve, including coils, movable iron cores, iron core springs and other components. In this scheme, the elastic force generated by the iron core springs and the displacement of the movable iron core linear relationship, while the electromagnetic force received by the movable iron core has a nonlinear relationship with the displacement of the movable iron core. When the displacement of the movable iron core is large, the increase of the electromagnetic force is much greater than that of the elastic force, so it is difficult to Open the solenoid valve smoothly and precisely control the opening of the solenoid valve

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