Dome Drive Electric upgrade System Observatory Automation Project
Dome Drive Electric upgrade System Observatory Automation Project Steven Bauman Operations M. E. Manager
Justification The Observatory Automation project required the Dome Drive System to be remotely operated and provide monitoring capabilities Conduct a Feasibility study Things to consider Options Retrofit the current hydraulic system Upgrade to an electronically controlled motor drive system
Or……Option #4 H ! r e w o p r e t s am
Results from testing
Conceptual Design reviews Assessment of the choices equally apples to apples comparison Evaluate and Distinguish best choice Current hydraulic system Upgrade the current hydraulic system Upgrade to electronically controlled motor drive system
Electric dome drive plan Design solution to replace the hydraulic power unit and hydraulic motors and operate the dome drive system with electronically controlled motor units. Detailed design changes, anticipated costs, design reviews Specifications and Requirements formed Calculations and data gathering
Beneficial Features and Improvements Increased speed capability from 60 deg/min to 72 deg/min Increased system efficiency Hydraulic system η~30% Electric system η~92% Reduced electrical consumption Reduced Environmental footprint Reduction of leak hazardous Reduced mechanical maintenance Will save 5 -10 k a year, amount currently spent on hydraulic system. Nominal cost difference between options Reliability Can operate with one drive out of service Designing for the future
Design solution actuator Hydraulic actuator replacement with Pneumatic actuator • Uses building air, 100 -110 psi, solenoid valve draws only 2 watts of power. Solenoid valve
Design Solution motor Drive unit with Electric motor drive controller Replace Hydraulic power unit Replace Manual control station Hand Held Pendent
Location control cabinet Location on 4 th floor *Eliminates heat source on 5 th floor Keypad interface
SHP Main shaft assembly Brevini Gear reduction box Re-use Hydroland Hydraulic motor SHP wheel assembly Replace
Baldor RPM AC 20 HP motor 1750 RPM 3 PH 60 HZ Electric motor New configuration Adapter kit Brevini Nema 250 TC Motor adapter flange Rotate assembly up to achieve more clearance.
Any Additional Questions or Comments? Thank you for your time!
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