Emergency braking system for elevator car

Abstract

The invention relates to an emergency braking system for an elevator car. The system comprises the following parts of a car, wherein the side walls and bottom of the outer surface of the car are provided with copper brake plates, and both ends of the wall brake plates at the side walls are provided with copper deceleration fins; an elevator shaft, wherein multiple magnetic splint layers are provided in the elevator shaft, an air pit is also provided at the bottom of the elevator shaft, and the air pit is internally equipped with magnetic splints; a drive unit; and a central control machine, which is set outside the elevator shaft and is respectively connected to the magnetic splints in each magnetic splint layer to adjust the intensity of current passing through the magnetic splints. The system provided by the invention sets up multiple layers of magnetic splints with electromagnetic splints and permanent magnetic splints in the elevator shaft, and gradually reduces the falling speed of the car through Lenz's law, thereby ensuring the safety of people and objects in the car, and improving the safety of the system. At the same time, the central control machine can adjust the currentinput of the electromagnetic splints in real time according to the height of the car when it falls and the speed when passing through the magnetic splints of each layer, and flexibly adjust the magnetic field strength, so that the system can face more diversity situations.

Description

technical field [0001] The invention relates to the technical field of elevator braking, in particular to an elevator car emergency braking system. Background technique [0002] Elevator is a kind of vertical elevator powered by electric motor, equipped with box-shaped gondola, which is used for multi-storey buildings to take people or carry goods. Elevators are used in multi-storey buildings and can be used to easily connect the upper and lower floors for the transportation of people and goods. The box used to carry people or loads is called an elevator car. When the elevator car is working, it is pulled by the steel cable and moves up and down the vertical shaft under the drive of the elevator. Once the elevator car is pulled by the steel cable, If the steel cable breaks, the elevator will be in danger of falling, making the people or goods in the elevator car in a dangerous state. Therefore, each elevator needs to be designed with a special anti-fall device when designin...

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Problems solved by technology

[0007] For this reason, the present invention provides an emergency braking system for an elevator car, which is used to overcome the problem in the prior art that the braking reaction force of a single braking is too high and the fixed magnetic field cannot be used for special situations. and item safety issues

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