PNEUMATIC DISC BRAKE SYSTEM FOR LARGE SIZED AC VERTICAL MOTOR

摘要

This invention relates to a pneumatic disc brake system for large sized AC vertical motor characterized in that: four pneumatic brake units (C, I), E, F) located 90" apart around a brake disc (5) fixed to brake hub (8) which is fitted on the motor shaft (10), wherein the said brake unit comprises 2 brake pads (1) accommodated in pad-holding shoes (2) and fixed to caliper arms (3), a thruster (A) with a piston slidably fitted within it, a piston rod fixed at one end 1o the said piston and resting at the other end on caliper arm lever of the said brake pushes the said caliper arm levers to actuate the braking action, a control unit (G) to regulate supply of pressurized air to the said brake units comprising an air reservoir (15) connected to air supply line port (A) through check valve (17), the inlet port (P) of a solenoid valve connected to the reservoir through a filter, regulator and lubr.cator (FRL) (20), the outlet port (Q) of the solenoid valve connected to a check valve with choke (13) which is connected to a pressure switch (12), a manometer (18) connected to the said valve (13) through a cut-off cock (11), a terminal box (19) electrically connected to the pressure switch and the 3/2 way solenoid valve.