The document presents information on machine-room-less (MRL) elevator design. MRL elevators have advantages like being made in the US, using less energy, and requiring a smaller building footprint. They also have disadvantages like higher initial costs and longer installation times than traditional hydraulic elevators. The document provides details on MRL features, configurations for passenger and service applications, and examples of MRL elevators installed at Chicago Transit Authority stations.
MACHINE-ROOM-LESS (MRL) ELEVATOR DESIGN to CTA ENGINEERING 19 JUNE 2014
1. MACHINE-ROOM-LESS (MRL)
ELEVATOR DESIGN
Presented to:
CTA Engineering and Maintenance
567 West Lake Street, Chicago, IL 60661
June 19th, 2014
By:
Mid-American Elevator Company, Inc.
820 N Wolcott, Chicago, IL 60622
Phone: 773.486.6900 Fax: 773.486.6605
2. MACHINE-ROOM-LESS (MRL) ELEVATOR DESIGN
Advantages:
Domestic origination (Hollister Whitney, Quincy IL)
Compliant with FTA “Buy America” requirements (49 CFR. Part 661)
100% Non-Proprietary
Seamless interface with multiple PLC based (per APTA) control systems
Green Application relative to other arrangements
Lower Motor/Brake BTU output
Lower HP requirements than other elevator arrangements for
the same speed and capacity
Regenerative drive capability
Smaller building footprint required
Faster car speed than typical hydraulic elevators
3. MACHINE-ROOM-LESS (MRL) ELEVATOR DESIGN
Disadvantages:
–Greater Initial Cost vs. Comparable Hydraulic setup
–Structural Loading Considerations
– Pit Floor and Tower Structure
–Increased maintenance costs vs. traditional Hydro but
comparable to traditional traction machines
–Longer installation timeline
–Increased pit and overhead requirements vs. Hydraulic
–Climate control required at top of hoist way for outdoor
applications
4. MACHINE-ROOM-LESS (MRL) ELEVATOR FEATURES
• Mechanically efficient gearless machine
• Dual braking eliminates need for rope gripper
• Manual brake release for emergency lowering
• Minimal control space requirements (remote or local)
• Rail mounted version
• Remote Resettable governors
• Optional Regenerative drive configurations
11. MACHINE-ROOM-LESS (MRL) ELEVATOR DESIGN
PASSENGER APPLICATION
FRONT AND REAR OPENING, SIDE
COUNTERWEIGHT
2:1 ROPED OVERSLUNG CAR SHEAVES
Standard Speeds: 150, 200, 350, 500
fpm [.75, 1.0, 1.75, 2.5 m/s]
Maximum Travel: 200’-0" [61 m]
Maximum Stops: 20
13. MACHINE-ROOM-LESS (MRL) ELEVATOR DESIGN
HOSPITAL / SERVICE APPLICATION
FRONT OPENING
2:1 ROPED OVERSLUNG CAR SHEAVES
Standard Speeds: 150, 200, 350 fpm
[.75, 1.0, 1.75 m/s]
Maximum Travel: 200’-0" [61 m]
Maximum Stops: 20
15. MACHINE-ROOM-LESS (MRL) ELEVATOR DESIGN
HOSPITAL / SERVICE APPLICATION
FRONT AND REAR OPENING
2:1 ROPED OVERSLUNG CAR SHEAVES
Standard Speeds: 150, 200, 350 fpm
[.75, 1.0, 1.75 m/s]
Maximum Travel: 200’-0" [61 m]
Maximum Stops: 20