Electrically-driven diaphragm vacuum pump or pressure pump - has cage around electromagnet coil through which central armature shaft extends between two vibratory spring plates

摘要

The diaphragm (3) in its central holder (2) is driven by a vibratory armature electromagnet. The coil (16) is enclosed concentrically in a peripherally interrupted ferromagnetic cage (19) forming two pole rings (25,26) sepd. by an annular gap (27). Two vibrating springs (42,43) fixed to bearing surfaces (61,62) of the housing (28,29) extend from opposite sides of the axis (9) of the system to equal distances, on either side of the cage (19) at the same spacing (b). ADVANTAGE - A common vibratory armature magnet consuming little energy is equally efficient at high vacuum and pressure, undergoes little wear and has a long lifetime.