College】 【weak elevator elevator technology --- Section --- Power By type and composition of China's weak home 【Network】..

<br> This section describes the classification of the elevator, composition, by learning the definition of the elevator and elevator response to a variety of classification methods have some knowledge of, and understand the set of selected control, parallel control and manipulation of the .elevator group control method.. <BR> Elevator is essential to modern building facilities in one.. The so-called lift, that is to use electric drive car to run on vertical or inclined not more than 15 ° between the two-row ., rigid, rail, transport passengers or goods, capital equipment.. The elevator is lifting machinery, is an intermittent mechanical motion of the lift, which mainly undertakes the task of vertical transportation.. <BR> <BR> Americans since 1857 ., research and test Otis the world's first successful manned elevator since the advent of technology, especially advanced countries in the elevator system has been constantly evolving.. Today, Otis elevator system to shuttle Odyssey system, elevator system used by the horizontal and vertical transportation technology .and advanced computer scheduling techniques together, by a computer navigation system to control the number of car within the shaft at a. move up and down, the car will not line up in a floor collision; car can be parked outside in the elevator shaft for .the upper and lower users; also allows the elevator to enter a location outside the building, such as access to a parking lot; after a period of. lateral movement of an elevator on the same staff can be reached within the top of the building; .application of lateral movement of the car can be staggered so that the elevator can reduce a building elevator shaft in the number of required and can save a lot of. space.. Mobile Schindler passenger elevator is a new transport system, it does not require hanging .rope, no machine room, shaft occupied a small area of each floor can be installed in 2 to 3 days, completed and delivered; it has the full. The new design: a lightweight aluminum car, a controller, an efficient electric motor; driven .by electric motors, driving two pairs of two hollow cylindrical polyurethane wheel in a special orbit; each pair of rollers driven by an active. idler wheel and a passive component, with a strong aluminum track in the spring pressed to provide enough friction to keep the .car in the beginning and end and run; in order to prevent self-supporting aluminum cylinder lateral displacement, it needs to be fixed. shaft wall, but the wells do not support the weight of the whole system; on weight is cleverly hidden in the .aluminum cylinder, so that style is more concise.. <BR> <BR> Current Dianti electric drive, the speed with AC variable frequency transformer means has become the mainstream of high-speed elevators, modern elevator technology emphasizes the quality and reduce .noise, the elevator has reached the speed of 16.7m / s.. First, lift the current classification of the basic classification of the elevator as shown below.. Type classification by use classification passenger elevator, cargo elevator, medical elevator, debris elevator, .sightseeing elevator, vehicle lift, ship lift, construction elevator, cold storage elevator, explosion-proof elevator, elevator shaft, elevator control, and firefighters lift station. elevators and other categories by way of exchange of the elevator drive, DC lift, hydraulic lifts ., rack and pinion elevators, screw and linear motor driven elevator elevators lift at low speed category (1.00m / s), medium-speed elevator (1.00 ~ .2.00 m / s), high-speed lifts (more than 2.00m / s .), ultra high-speed lifts (more than 5.00m / s) and special high-speed elevators (16.7m / s) classified according to whether the driver has the driver lifts, elevators and no drivers. Yes / No driver elevators control category .by manipulating the handle switch control, button control elevator, the elevator signal control, set the selection control elevators, escalators and parallel control group control elevators cold storage by special use classification elevator, explosion-proof elevator, elevator shaft,. Power Lift and firemen .and other modern property with elevator elevator used for construction are signal control, set selection control, parallel control and group control elevator four control methods, the control features are described below.. ① Characteristics of the elevator signal control with automatic leveling addition, automatic door .function, the command is still registered with the car, landing call registration, automatic stop layer, the forward stop and automatic reversing function.. ② control of the elevator is a set of selected control in the signal developed on the basis of the automatic control .of the elevator, and the difference between the signal control can be realized without driver operation.. Main features are: the car within the outer layer selection call signals and signal layers together, automatic decisions, under the direction of the order of response.. .③ Parallel control of the elevator is to 2 to 3 sets of elevator control logic control circuit connected in parallel, sharing layer outside the station call button, the elevator itself has a set of selected features.. ④ elevator group control feature is unified with the .computer control and focus on more than one parallel lift.. There are two control methods.. Control the traffic pattern at a pre-programmed procedures, centralized scheduling, and control the operation of elevator group, called the ladder program control group.. To .achieve automatic data collection, exchange and storage, as well as for analysis, screening and reporting functions, called Ladder Group Control.. Second, the composition of the elevator traction elevator vertical transport is the most common type of lift, and its structure is dominated .by mechanical and electrical components, as shown below.. Composition, the role of mechanical devices part ① traction elevator system is to provide power equipment, the traction machine of the rotary motion into vertical motion of the elevator car <BR> ② traction on .the traction rope along the elevator shaft. The guide channel for the rapid and smooth running <BR> ③ door system function is turned on or off the car and landing door entrances and exits landing guidance system <BR> ④ role is to limit .the activities of car and heavy degrees of freedom, the car. car and heavy rail only along for weight lifting movement <BR> ⑤ weight and balance system by the weight of the composition of compensation device.. Will balance the weight of heavy car .and part of the rated load.. Weight compensation device to compensate for high-rise elevator car and the traction on the heavy side of the rope length change on the design of the elevator balance of mechanical safety device <BR> ⑥ by mechanical overspeed .protection devices, buffers and the end station protection device to form.. Serve to prevent the elevator speeding, terminal offside, hoisting or squat at the end part of the protection of electrical installations such as ① the traction motor electric drive system, power supply systems ., speed control devices and speed feedback device composition.. Speed control on the implementation of the elevator operation control system consists of <BR> ② control device, leveling devices and constitute a layer selection, etc ... The implementation of the elevator control .and monitoring system <BR> ③ means of electrical safety systems for elevator control system to achieve security and electrical circuit protection device elevator safety first.. General Elevator potential hazards are: staff squeezed, impact and incidence of falls, shear; officers were electric .shocks, the car crash occurred beyond the limits of travel; car speeding or fall caused by broken rope; due to material failure, loss of strength. causing structural damage and so on.. So to all potential hazards for, set a special security device ... Mechanical safety devices are governor, safety gear and buffers, etc., electrical safety devices are overspeed protection, landing door locking devices protect the electrical chain, door security, beyond the protection of the upper and lower end station and the operation phase protection ., phase failure ... Third, is an escalator escalator steps with a loop to run for the tilt up or down continuously transport passengers transport equipment.. It looks like a moving visual stairs, accompanied by movement of the handrail, the main venue for .the population concentration.. <BR> Mainly by the escalator steps, traction chains, drives, rails, metal frame, handrails, tensioning device, brake components and safety devices.. <BR>..