How to select guide rail for your elevator correctly?

Guide rail: a device, such as a groove or ridge made of metal or other material, capable of withstanding, securing, guiding or reducing friction

It should have the following properties:

(1) Guidance accuracy — the accuracy of trajectory guidance. The main factors affecting the guidance accuracy include: geometric accuracy and contact accuracy of the guide, the structure of the guide, the stiffness and thermal deformation of the guide and its supporting parts and the oil film thickness and stiffness between static (dynamic) pressure guides.

(2) Accuracy retention — mainly determined by the wear resistance of the guide rail. The wear resistance is related to the material of the guide, the friction property of the guide pair, the pressure on the guide and its distribution law.

(3) Stiffness — mainly includes the guide’s own stiffness and contact stiffness. It mainly depends on the shape、size、connect mode and bearing condition of guide rail.

(4) Low speed motion stationary — the friction-induced self-excited vibration of guide rail during low speed movement or micro-displacement is easy to occur, that is, crawling. Crawling reduces the positioning accuracy or increases the surface roughness of the work piece

The T Type- shaped guide rail & the hollow guide rail of the guide rail type

T type guide: its main dimensions and tolerances are shown in the table below. The common guide rail listed in the table and T82/B is the industry size, which is different from the old lift t-guide standard J6 5072.1-1996.

elevator parts, guide rail, guidance accuracy of guide rail, accuracy retention of guide rail, stiffness of guide rail,

Main dimensions and tolerances of guide rail

 

Model and tolerance b h k
T75—3/B 75 62 10
T78/B 78 56 10
T82/B 82 62 16
T89/B 89 62 16
T90/B 90 75 16
T114/B 114 89 16
T125/B/BE 125 82 16

Hollow guide—it is made of steel plate through cold bending (or rolling) into a hollow t-shaped elevator to reuse the guide rail, which can reduce the weight and cost due to its empty characteristics. It satisfies the function of heavy guidance, but cannot bear the clamping force of safety pliers, so it is only used for the weight guide rail without the weight safety pliers and the elevator speed is not high.

The name of hollow guide is composed of class, group, type, feature, main parameter and deformation code.

□– deformation code: A means underside folding, underside straight edge omitted

△– Main parameter code: expressed as per unit weight of guide rail, kg/m

K– Type code: hollow section steel

T — Class group code: t-shaped elevator for reuse guide rail

 

For example, TK5A represents a 5kg/m t-shaped hollow guide with folded edges

 24 Factors May Cause an Elevator Failure in 2018

Every elevator part is very important. Any failure of an elevator part will cause an elevator accident. Therefore, it is very important to ensure the safety of the elevator.

Every elevator part is very important. Any failure of an elevator part will cause an elevator accident. Therefore, it is very important to ensure the safety of the elevator.

(1) The defects of the motor will affect the safe operation of the whole drive system, and it is easy to have an unsafe impact on passengers.

(2) Severe wear or peeling of the gear (worm gear pair) will cause the elevator to run out of control due to the failure of the transmission, which may cause damage to the personnel.

(3) The brake, brake springs, brake arm, failure will cause brake failure, cause the car run out of control, thus, header, Dun bottom accident caused casualties and severe damage to equipment.

(4) The severe wear and hardness difference between the grooves and the grooves of the traction wheel will reduce the traction of the elevator, which can cause the elevator to run out of control and cause damage to passengers.

(5) The failure of the anti-rope wheel, the rewinding wheel and the guide wheel can easily cause the elevator to run out of control and cause damage to the passengers.

(6) The defects of the steel wire rope and the rope head are easy to cause the steel wire rope to break or slip, the cage fall, and cause the damage of equipment and buildings, and the serious accident of casualties.Continue reading