Product Application by Industry - Airflex - #4

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F:T*N
Airflex Engine Clutches
Engine Clutch Arrangements
For direct engine drive applications, the standard arrangement (Forms CB408 and CB427) uses an external flange drum mounted to the engine flywheel. The clutch element and its spider are fastened to a separate bearing supported jackshaft as shown in the figure.
When the clutch mounts on an engine stub shaft or on the output shaft of a torque converter, then the standard gap mounting arrangements (Forms CB406 and CB407) are used.
Clutch Engagement Speed
The recommended clutch engagement speed is 3000 fpm (15,2 mps) at the friction couple. If the speed at engine idle exceeds this value, then the idle speed should be changed.
Typical Spider Engine-Mounted Application
1—tf~
r1
Engine Clutch Control
To ensure clutch engagement at engine idle, the control shown below is recommended.
Relay Valve
snap acting sequencing
passes air only when pilot pres­sure exceeds a set pressure (100 PSI)
Pneumatically Controlled Engine Governor/Throttle
Pilot connection should be located as
close to the clutch as possible
Pilot
Supply Pressure (110 PSI)
Control Valve
2 port compound Port A: instant on/off
Port B: modulated pressure with lever po­sition
This control system prevents the engine speed from increasing before the pressure in the clutch reaches a preset value.
CB Clutch
X-3
Copyright Eaton Corporation, 1997, All rights reserved.

pageCatalog pdf di En 2012-05-21-26