Method and device for realizing dynamic balance, energy saving and self-weight requirement reduction of traction elevator

Abstract

The invention provides a method and device for realizing dynamic balance, energy saving and self-weight requirement reduction of a traction elevator. The device comprises an auxiliary traction device, a hydraulic energy storage device and an electric control device. According to the invention, the operating performance of the traction elevator is optimized through mutual transformation of gravitational potential energy and hydraulic energy and control of the speed and direction of energy conversion during the mutual transformation process; an energy storage device stores energy and releases energy to enable a pump motor to act on the traction elevator, and the magnitude and direction of an acting force are adjusted in real time according to the load and operating signals of the traction elevator to reduce the load difference between two ends of a traction wheel and realize dynamic balance of traction together with a counterweight; redundant gravitational potential energy is stored in the energy storage device to reduce the negative work a traction motor does in a third quadrant to reduce the energy consumption of the traction motor and realize the purpose of energy saving; and through auxiliary hydraulic drive, the requirement of maximum traction force is reduced so as to reduce the positive pressure required by the traction wheel to realize self-weight requirement reduction.

Description

technical field [0001] The invention belongs to the technical field of elevators, and in particular relates to a method and a device for dynamic balance, energy saving and self-weight reduction of a traction elevator. Background technique [0002] The two ends of the traction elevator traction machine are respectively connected to the car and the counterweight. The traction drive relies on the traction force (friction force) generated by the traction wheel and the wire rope for transmission. The elevator operation must meet the following requirements; [0003] 1. The elevator needs to meet the driving requirements [0004] The traction elevator satisfies the requirements of accelerated motion when fully loaded, ignoring the friction between the car, counterweight and the outside, ignoring the elastic effect of the wire rope, and establishing a static force equation on both sides of the traction sheave, which can be expressed as: [0005] (1) [0006] in F f is the trac...

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Problems solved by technology

The above technologies can effectively achieve load balance and reduce the impact of elevator starting and braking, but all require additional energy input, and energy recovery and utilization cannot be performed at the same time

[0017] There are the following technologies to try to save energy: the braking resistor is installed in the incubator, and the heat emitted by it is accumulated in the incubator, and then the Stirling generator is used to convert the heat energy into electrical energy for recycling; the traction machine is in the power generation mode When the electric energy is recovered, it is sent to the storage battery through the controller. When the traction machine is in the electric working condition, the electric energy output by the controller is adjusted and sent to the frequency converter of the elevator; when the traction machine is in the power generation working condition, The generated electric energy is recovered, and then sent to the supercapacitor through the controller. When the traction machine is in the electric working condition, the electric energy output by the controller is adjusted and sent to the inverter of the elevator, but the service life of the supercapacitor is short, and the feedback The voltage will pollute the power grid and has not been applied on a large scale

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