Types Of Machine Room Fewer Elevators - PowerPoint PPT Presentation

About This Presentation
Title:

Types Of Machine Room Fewer Elevators

Description:

In this post, we have to share some types of machine rooms with fewer elevators. The space of the hoistway is precisely like our regular elevator for extra space-saving. So the only item you have to consider is hoistway in your planning. – PowerPoint PPT presentation

Number of Views:32

less

Transcript and Presenter's Notes

Title: Types Of Machine Room Fewer Elevators


1
All You Need To Know About Machine Room-Less
Elevators
2
  • Machine room-less elevators, usually known as
    MRL, are either hydraulic or traction elevators
    that do not require a machine space for the
    elevator. Let's explore the brief information
    regarding this below

3
Types Of Machine Room Fewer Elevators
  • 1. Traction elevators
  • Machine room less elevators do not possess a
    fixed machine room above the hoistway instead,
    the traction hoisting machine is lodged either on
    the bottom of the hoistway or the top sidewall of
    the hoistway. The electric motor is installed
    utilizing a permanent magnet that sticks the
    motor indelibly and operates with VVVF (Variable
    Voltage Variable Frequency) drive. 
  • Some of the hoisting machines are utilizing
    gearless coincide motors instead of traditional
    induction motors. This structure removes the
    requirement of a fixed machine room and further
    saves more building space. Overall, all the MRL
    traction elevators are gearless traction.
  • Though the hoisting motor is lodged on the
    hoistway sidewall, the central controller is
    installed on the top floor following the landing
    doors. This controller is located behind a locked
    cabinet which has to be unbolted utilizing a key
    for repair, maintenance, or emergency purposes. 

4
  • Most elevators have their controllers lodged on
    the top floor, but only the lesser elevators have
    their controllers lodged on the bottom floor.
    Some elevators may have the hoisting motor placed
    below the elevator shaft put thus, it is known
    as the bottom drive MRL elevator. Some elevators
    have the controller cabinet longed within the
    door frame rather than on the wall to save space.
  • Like standard traction elevators, machine room
    less elevators use traditional steel cord ropes
    as hoisting cables. Therefore, some elevator
    brands use flat steel rope belts instead of
    conventional ropes. It is stated by the
    manufactures using this technology said that
    using flat steel belt ropes ultimately saves more
    space in the hoistway and enables a minimum size
    of the hoisting sheave. 
  • However, the flat steel belts also permit 30
    percent lighter compared to the traditional steel
    ropes. Most mid-rise buildings use the MRL
    elevators as the mid-rise buildings cater up to
    20 floors.

5
  • 2. Hydraulic elevators
  • Like the traction version, machine room less
    hydraulic elevators do not possess a fixed space
    to store the hydraulic machinery. The machinery,
    which consists of a pump, is installed on the
    elevator pit. The controller is placed on a wall
    close by the elevator and generally on the bottom
    floor. The merit of machine room less hydraulic
    elevators saves the construction space, cost, and
    time.

6
How Do MRL Elevators Work
  • Machine room less elevators use a gearless
    traction machine placed in the hoistway. The
    utilization of a counterweight helps the Machine
    turn the elevator sheave, which moves the cab
    from the hoistway. It is generally seen in
    apartments, mixed-use buildings, commercial
    offices, hotels, MRL elevators exclusively can
    withstand upto 2-25 stops (with a standard
    capacity of 2100 to 5000 lbs) and feature
    feasible design. And massive capacities (4000 lbs
    and above that) can lodge heavier can finishes.

7
MRL Advanced Features
  • Ultra-modern door controls
  • Variable Voltage Variable Frequency (VVVF)
    inverter control ensures quiet, smooth door
    operation. It enhances the product reliability
    and passenger's safety. This advanced door
    operation system utilizes a one-chip RISC
    microcomputer to recognize differences in the
    door load, the firmness of the debris in the sill
    grooves, and the firmness of the wind. 
  • It adjusts the door closing and opening speeds
    and the door motor torque at every floor
    utilizing the auto-tuning function. Additionally,
    the door system is structurally secluded to the
    car frame instead of mounted straightforwardly to
    the car top. Thereby, it reduces the vibration
    and noise transmission from the elevator cab.

8
  • Extra architectural freedom
  • Builders, interior designers, and architects will
    admire the architectural freedom that a machine
    room less elevator system offers. Now, all the
    machinery successfully into the hoistway in this
    case, an overhead elevator machine room is no
    longer required. 
  • Exceptionally, the control panel has to be
    located within a 100foot distance from the
    gearless traction machine. Also, a traditional
    machine room elevator appertains load stress in a
    building's construction, but comparatively, guide
    rails withstand as much as 75 percent of the load
    for additional building affability.
  • Effective use of power
  • When machine room less elevators move down with a
    light carload (regenerative operation) or heavy
    carload, the gearless traction machine performs
    as a power generator. Though the power produced
    during machine traction operation is typically
    dissolute as heat, the regenerative converter
    transfers the power back to the distribution
    transformer and next to the electrical network in
    the building with electricity through the power
    supply. This system offers an energy-saving
    impact of up to 35 percent. 

9
  • Machine room detached for space-saving
  • The traction machine's condensation, which leads
    to the development of the gearless traction
    machine and the PM motor, allows a hoistway to
    contain driving instruments typically installed
    in a machine room. Furthermore, the space of the
    hoistway is almost precisely like our standard
    elevator for extra space-saving. So the only
    thing you have to think about is hoistway in your
    planning.
  • The benefit of machine room less elevators
  • It ultimately saves the building space, as it
    does not require an area for machine room
  • Upt0 70 of the building electricity can be saved
  • It eliminates the risk of fire, as no oil is used
  • Comparatively a Lil bit of lower cost than other
    elevator types.

10
Disadvantages
  • There is high-frequency, loud sound when the
    elevator is running because of VVVF (variable
    voltage variable frequency)
  • No code has been certified for the installation
    of machine room less as residential elevators
  • Equipment may be relatively difficult to
    maintain.
  • When compared o other types of elevators, MRL
    elevators have a low life expectancy
  • The motor can be vandalized in bottom drive MRLs
    in the action of pit flooding.

11
Conclusion
  • Comprehensive information and benefits of using
    the machine room less elevators (MRL) are
    explained in the above post. It can be understood
    from the above information that it does not
    possess a different space for housing the
    elevator's motor. Instead, an exclusively
    constructed motor is logged directly in the
    hoistway at the bottom or top of the shaft.
    Therefore, the lift may be a hydraulic or
    traction machine though a machine room less
    elevator appears as a regular elevator in
    multiple ways.

12
105, Royal Complex, Dhebar Road, Rajkot-360002,
(Gujarat) INDIA.
info_at_tectronicsindia.com
919099071747 919825699071
Write a Comment
User Comments (0)
About PowerShow.com