Electropneumatic control arrangement for magnetic rail brake - incorporates air-operated valve for preliminary control of pilot disc valve monitored by speed-dependent pressure signal

摘要

An actuating piston (28) slides in a housing (30) between an upper space (24) connected to the main air line (1), and a lower space (25) communicating with a pressure chamber (26) via a direct connection (32) and a radial bore (31) within the stroke of a K-groove around the rim of the piston (28). The tubular shaft (35) of the piston (28) is penetrated by the plunger (20) of another piston (18) closing a current switch (21) in the power supply line to the braking electromagnet (22), which is raised when pneumatic cylinders (23) are vented. ADVANTAGE - Almost instantaneous disconnection of brake achievable.