Actuators for turbo compressors
A
RA Rodriguez product story
Edited by the Engineeringtalk editorial team
Jul 31, 2009
Framo Morat has provided actuators for Howden Donkin's integrally geared turbo-compressors.
The compressors rely on the actuation of two sets of vanes that influence the air-flow into the compressor, according to process performance.
The Framo Morat Mini range of actuators allow high forces to move at slow speeds and are included in three types of controls.
On the inlet guide vane control assembly (IGV) the stainless-steel guide vanes are adjusted around the bore of the inlet branch to pre-rotate the air before it enters the impeller.
On the variable diffuser vane control assembly (VVD), the linear actuator controls the movement of stainless-steel aerofoil vanes.
The application requires the actuators to make small and frequent movements in both directions and at 2mm/sec at a maximum force of 5,000N.
The Mini uses a coaxial motor to achieve the required stroke with minimum space.
Models are supplied to Howden Donkin with 3ph 400V 50Hz drive motors for the application and in stroke lengths from 100 to 250mm.
Fine tuning of the air-flow is provided by an integral potentiometer on the Mini, confirming the absolute position of the actuator so that maximum operational efficiency can be achieved.
These include a thermally protected motor, life-time lubrication and integral safety switches, ensuring reliable operation in extreme conditions.
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