What is a rumless elevator?

(elevator without motor home)

Rumless two-to-one elevator is a part of the gearless elevator family, with the feature that Rumless elevators do not need to build an engine room and all the parts of the elevator are integrated in a single capsule called the elevator well. Rumless two-to-one elevators are in addition to the advantages Gearless elevators have other advantages.

Definition of MRL lift
MRL stands for MACHINE ROOM LESS. This term is used for elevators without a motor room. In some cases, traction elevators do not have an independent space for the engine and control panel. Therefore, the desired parts are installed in different parts of the well in an engineering manner. According to engineering calculations, the elevator motor is installed in a part of the well. The type of installation of power transmission cables is also determined based on this space. And based on that, there are different names for traction elevators.
The MRL motorless traction elevator is implemented in buildings that have height restrictions or an elevator with a stop on the roof is required.
Rumless elevators are a new product in the elevator industry. These elevators can be an alternative to hydraulic elevators or traditional traction elevators. These elevators are safer.
These elevators are used in new construction or major renovation projects compared to standard elevator equipment.

Types of elevators
There are three types of elevators, which are:
• Tensile
• Hydraulic
• MRL

The basis of the work of Rumless elevators
In these elevators, liquids are transferred into the cylinder through the pump. In traction lift without engine room MRL, when liquid collects inside the cylinder. The piston is moved up and the elevator car moves. When the valve opens, it is under pressure. The liquid chooses the path with the least resistance and returns to the liquid tank.
As the car approaches the correct floor, the control system sends a signal to the electric motor. The pump is gradually turned off and the valve is closed. When the pump is turned off, no more liquid enters the cylinder. But the fluid inside the cylinder cannot flow back through the pump. And the valve remains closed. The piston is placed on the liquid and the machine stops there.

What is MRL traction lift without engine room?

Roomless elevators do not have a separate room to place the motor. Therefore, the designed motor is installed directly in the elevator, at the top or bottom of the shaft.
Rumless elevators are similar to conventional elevators in many ways. In these elevators, the lift can be traction or hydraulic. These elevators, like other elevators, can also be moved on steel wire cables. However, MRL elevators are driven by a permanent magnet motor (PMM). These engines are very new and it is possible to remove the engine room in them.
MRL elevators have high performance and ride quality. And they work faster.
The MRL engineless traction lift does not require a machine room. In these elevators, the device is placed in the overhead space on a traction unit. If any repair or maintenance is needed, they can access it from the top of the elevator cabin. The driving mechanism is located in the pits of the hydraulic unit.

Rumless elevator motor
Some lifting devices use gearless synchronous motors instead of induction motors. In this design, there is no need for a fixed machine room. Therefore, building space is saved. In general, all MRL traction elevators are gearless.

Advantages of elevators without engine room
There are several reasons for using the MRL motorless traction elevator in a building. These elevators have important advantages, including cost and space savings, and provide a solution to common construction challenges. The following are the most important advantages of these elevators:
They use less space.
In the MRL elevator, there is no need for a separate room to place the motor. These elevators require less space compared to traditional elevators. This has made designers and architects use extra space and have more freedom in design.
They use energy correctly.
Compared with hydraulic elevators, the MRL motorless traction elevator saves 70 to 80 percent of energy consumption. Saving energy also saves money. On the other hand, sticky MRLs do not use oil. And this leads to cost savings and minimizes the risk of fire.
They have a suitable design for medium and even smaller buildings.
Saving space in a small or medium-sized building has many advantages. Roomless elevators are designed according to the space limitations of smaller buildings.
MRL motorless traction elevators are suitable for flood-prone areas.
In the elevator, MRL motor and controller are installed at the top of the elevator. Therefore, they are a suitable option in areas that suffer from flooding. The lifting height makes the machines out of the water and not damaged.
The cost of installing these elevators is low and economical.
Since there is no need for a separate room or a burial