Clutch/Brake Packages - Airflex DCB combination air-actuated disc clutches and spring-applied disc brakes - Airflex - #1

Description and Technical Data

The 21DCB combination clutch/brake package was specifically designed for the can making in­dustry to withstand the cyclic impact loads as­sociated with high speed can extruding machinery. A patented quick release air manifold provides fast clutch/brake response; stopping the ram to prevent die damage due to material misfeed.

The unit is ideally suited for high speed continu­ously running machinery requiring an extremely fast stop.

The package consists of an air-actuated disc clutch and a spring-applied disc brake. The clutch disc is guided axially at its outside diame­ter by a series of bushings which attach to the driving flywheel. The brake disc is reacted to the machine frame by two reaction arms. The hous­ing hub is pressed on and keyed to the driven shaft.

When the cylinder is pressurized, the piston clamps the clutch disc to the hub, transmitting torque to the shaft. When the cylinder exhausts, springs move the piston in the opposite direc­tion, clamping the brake disc and stopping the shaft. Overlapping cannot occur between clutch­ing and braking.

Torque Rating M_r° at 85 psi (5,9 bar)

Clutch static torque: 75000 Ibin (8475 N-m) Brake dynamic torque: 55000 Ib-in (6215 N-m) Operating Pressure

Maximum allowable pressure p_r: 85 psi (5,9 bar) Brake releasing pressure p_s : 38 psi (2,6 bar)

1000 rpm

Housing : 90 lb-ft² (3,8 kg-m²) Clutch disc : 18 lb-ft² (0,76 kg-m²)

Housing and manifold: 290 lb (130 kg) Each friction disc : 52 lb (24 kg)

Air Cylinder Volume⁶

With new linings : 55 in³ (0,8 dm³) With worn linings: 80 in³ (1,3 dm³)

With new linings : 0.035 sec With worn linings: 0.045 sec Thermal Capacity

Non-Cyclic: 400000 ft-lb (542400 J) Cyclic:

100 rpm: 1.5 HP (1,1 kW) 300 rpm: 2.1 HP (1,6 kW) 500 rpm: 2.6 HP (1,9 kW)

700 rpm: 3.1 HP (2,3 kW) 900 rpm: 3.4 HP (2,5 kW)

O Ratings are for worn in new linings. Decrease rat­ings 12% for worn linings.

® Maximum speed for non-cyclic operation. Maxi­mum speed for single stroke operation is depend­ent upon thermal requirements. Dynamic balancing required for operating speeds over 750 rpm.

© Absolute volume required per engagement.

F-11

Copyright Eaton Corporation, 1995, All rights reserved.