| 摘要 |
The invention relates to a solenoid plunger system (4) for an electropneumatic pressure transducer (1), comprising an iron casing, a solenoid plunger (45) and a core (48). According to the invention, the solenoid plunger (45) has at least one cavity (45a) on the side facing the core (48) and an air gap (49) is provided between the plunger (45) and the core (48). The air gap (49) can be adjusted by the relative movement of the solenoid plunger (45) and the core (48). The casing comprises at least one first sleeve (42), a yoke (50) and a second sleeve (47) with a high magnetic permeability, located between the first sleeve (42) and the yoke (50), said second sleeve having at least one cavity (47a), in particular in the form of an annular groove on the side facing away from the core (48), which concentrates magnetic field lines (M) from the yoke (50) to the core (48). The yoke (50) and/or an adjusting member (51), in particular an adjusting ring with a high magnetic permeability, can be displaced relative to the sleeve in the vicinity of its cavity (47a) in order to adjust the effective magnetic length (l) of the cavity (47a) of said second sleeve (47). |
