六场半全场胜负彩开奖 www.bfbdrg.com.cn The elevator is a kind of electric motor driven vertical lift, with box shaped pod, for multistory buildings or by people carrying goods. There are steps, step plate installed in continuous operation of the track, commonly known as the escalator or walkway. Fixed lifting equipment for service floor. The vertical elevator has a car that runs between at least two rigid rails with a vertical or inclined angle of less than 15 degrees. Regardless of the way it is used, the elevator is used as a general term for vertical transport in buildings.

According to speed can be divided into:

Low – speed elevator (1 m / s or less);

Fast elevator (1 ~ 2 m / s);

High-speed elevator (2 m / s or more).

Elevator by use classification, the following:

Passenger elevators, designed for the delivery of passengers to the elevator, requires a sound safety facilities and a certain car decoration.

A cargo elevator, designed primarily for the transport of goods, usually accompanied by an elevator.

Medical elevator, for the delivery of beds, stretchers, medical vehicles and the design of the elevator, the car has a long and narrow features.

Debris lift, for the library, office buildings, hotels, transportation of books, documents, food and other design of the elevator.

Sightseeing elevator, car wall transparent, for passengers to use the elevator.

A vehicle elevator used as an elevator to transport vehicles.

Ship lifts, elevators used on ships.

Construction of elevators, construction and maintenance of the elevator.

Other types of elevators, in addition to the above commonly used elevators, but also some special purpose elevators, such as cold storage elevators, explosion-proof elevators, mine elevators, power station elevators, firefighters elevators, oblique elevators, nuclear island elevators.

The elevator is a kind of electric motor driven vertical lift, with box shaped pod, for multistory buildings or by people carrying goods. There are steps, step plate installed in continuous operation of the track, commonly known as the escalator or walkway. Fixed lifting equipment for service floor. The vertical elevator has a car that runs between at least two rigid rails with a vertical or inclined angle of less than 15 degrees. The size and structure of the car is convenient for passengers to enter or unload goods. Regardless of the way it is used, the elevator is used as a general term for vertical transport in buildings. According to the speed can be divided into low speed elevator (1 m / s), fast elevator (1 ~ 2 m / s) and high speed elevator (more than 2 m / s). In the middle of the nineteenth Century, hydraulic elevator began to be applied in low rise buildings. In 1852, the United States E.G. Otis developed a wire rope hoist safety elevator. In 80s, the drive device has been further improved, such as the motor driven by the worm winding drum, the use of balance weight, etc.. The end of nineteenth Century, the use of friction wheel drive, greatly increasing the lift height of the lift.

At the end of the 20th century, the elevator adopts permanent magnet synchronous traction machine as power. Greatly reducing the room area, and has low energy consumption, energy efficiency, enhance the advantages of speed, greatly boosting the real estate to the direction of development of high-level.