Auxiliary braking device of cordless elevator and control method thereof

Abstract

The invention discloses an auxiliary braking device of a cordless elevator and a control method thereof. A break body is composed of a magnetic shaft, a magnetic insulation front cover, a rear baffle and two lateral walls and encircled into a hollow structure with a cylindrical middle, and the magnetic shaft is arranged in the hollow structure and can rotate in the hollow structure; and the magnetic shaft is cylindrical and formed by two permanent magnets and a magnetic insulation interlayer which is arranged in the middle and fixedly connected with the two permanent magnets, magnetic pole directions of two permanent magnets in a same radial direction are identical, and one end of the magnetic shaft is fixedly connected with a rotating mechanism which is connected with an electronic control unit. During emergency braking, the electronic control unit controls a break boot to be close to a rail, and non-contact vortex braking force is generated between the break boot and the rail; the electronic control unit controls the rotating mechanism to rotate, and magnetic pole attraction is produced between the break boot and the rail, so that the break boot is absorbed on the rail, and friction braking force is generated; and the problem that sufficient braking force cannot be provided under the condition that emergency braking happens to a prior cordless elevator is solved.

Description

technical field [0001] The invention relates to a cordless elevator, in particular to a braking device for the cordless elevator. Background technique [0002] With the further improvement of the degree of urbanization in our country, the demand for high-rise and super high-rise buildings is increasing. In these high-rise buildings, the vertical transportation system plays a very important role. Common vertical transportation systems include rope traction elevators and linear motor drive elevators. Among them, rope traction elevators use clamp-type brake protection when a rope breakage accident occurs, and the bridge is stopped by clamping the rails by spring action. There are still two disadvantages in the rope traction elevator: 1. One elevator shaft can only run one bridge compartment. If you want to shorten the waiting time for the elevator, you will increase the number of elevators, which will inevitably reduce the effective area of ​​the building and increase Cost: 2...

AI Technical Summary

Problems solved by technology

Common vertical transportation systems include rope traction elevators and linear motor drive elevators. Among them, rope traction elevators use clamp-type brake protection when a rope breakage accident occurs, and the bridge is stopped by clamping the rails by spring action. There are still two disadvantages in the rope traction elevator: 1. One elevator shaft can only run one bridge compartment. If you want to shorten the waiting time for the elevator, you will increase the number of elevators, which will inevitably reduce the effective area of ​​the building and increase Cost: 2. For some super high-rise buildings, in order to ensure the safety performance, the wire rope of the traction elevator must become longer and thicker, and the power of the motor needs to be increased

[0003] The Chinese patent announcement number is CN 2545174Y, titled "elevator driven by a cylindrical linear motor", which discloses a scheme for installing a safety brake caliper on the top of the car. When an emergency occurs, the safety brake caliper is used for braking. The defect is : The elevator driven by the linear motor will lose its thrust due to power failure, drive system failure and other reasons. If the safety brake clamp fails again, the elevator will be in danger at this time.

And in the case of emergency braking, the linear motor cannot continuously provide sufficient braking force

[0004] Although some people have proposed to use multiple power supply and power storage devices in conjunction with technical means, in case of emergency, supplemented by regenerative power generation braking and mechanical braking, but during the conversion of power supply mode, because there is no counterweight and steel wire rope, the elevator will accelerate at the rate of gravity. whereabouts

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