Elevator Wire Rope Tension Equalization for Safety and Durability
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Summary
Problems
Elevator wire ropes experience tensional imbalances due to mechanical contraction and expansion, leading to eccentric abrasion of pulleys, uneven travel distances, and vibrations that can damage the elevator car and reduce its lifespan.
Innovation solutions
An apparatus with a tension adjustment unit, including pulleys, rotating plates, bevel planet gears, and external gears, which connects to the elevator wire ropes via belts to automatically equalize tension by adjusting the length of the belts wound around pulleys, ensuring uniform tension across the wire ropes.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If periodic inspection and management is performed on elevator wire ropes, then the inspection process can be simplified and scheduled, but tensional imbalance occurs in real-time between inspections causing pulley abrasion and vibrations
Why choose this principle:
The patent implements a self-adjusting tensioning mechanism where the equalizing apparatus automatically detects and compensates for tension differences among wire ropes through mechanical linkages and adjustable tensioning devices, eliminating the need for manual intervention between inspections and maintaining continuous tension balance
Principle concept:
If periodic inspection and management is performed on elevator wire ropes, then the inspection process can be simplified and scheduled, but tensional imbalance occurs in real-time between inspections causing pulley abrasion and vibrations
Why choose this principle:
The patent incorporates tension sensing mechanisms that continuously monitor the tension state of each wire rope and provide feedback to the adjustment mechanism, which then automatically modifies the tension of individual ropes to maintain equilibrium, creating a closed-loop control system
Application Domain
Data Source
AI summary:
An apparatus with a tension adjustment unit, including pulleys, rotating plates, bevel planet gears, and external gears, which connects to the elevator wire ropes via belts to automatically equalize tension by adjusting the length of the belts wound around pulleys, ensuring uniform tension across the wire ropes.
Abstract
Disclosed is an apparatus for equalizing tensions among elevator wire ropes, which immediately eliminates imbalance and equalizes the tensions among elevator wire ropes in the event of differences in the lengths of elevator wire ropes, thereby improving safety, durability and reliability. The apparatus automatically corrects imbalance caused by changes in the lengths of a plurality of elevator wire ropes ( 700 ) to maintain a balance in the tensions of elevator wire ropes. The apparatus includes a body ( 200 f ) formed therein with a receiving space; a tension adjustment unit coupled to a plurality of belts ( 10 f, 20 f, 30 f and 40 f ) connected to the elevator wire ropes ( 700 ), respectively, and installed in the body ( 200 f ); a main rotary shaft ( 50 f ) rotatably coupled to the body ( 200 f ) by passing through the tension adjustment unit; and first and second external gears ( 45 f and 48 f ), which are fixed to the main rotary shaft ( 50 f ) such that the first and second external gears ( 45 f and 48 f ) are rotatable, and which are coupled to the front and rear surfaces of the tension adjustment unit to transmit rotating forces.