Fatigue test device for elevator steel wire ropes

Abstract

The invention relates to a fatigue test device for elevator steel wire ropes. The fatigue test device for the elevator steel wire ropes comprises a machine frame, an upper testing wheel is rotatably arranged on the top of the machine frame, a transition wheel is rotatably arranged on a middle portion of the machine frame, a loading case is movably arranged on a lower portion of the machine frame, and a lower testing wheel is rotatably arranged in the loading case. A connection rod mechanism is arranged on one side of the machine frame, steel wire ropes to be tested encircle the upper testing wheel, the transition wheel and the lower testing wheel and are connected with the connection rod mechanism, and the connection rod mechanism is connected with a driving motor. The fatigue test device for the elevator steel wire ropes is characterized in that the upper testing wheel, the transition wheel and the lower testing wheel are respectively provided with at least four rope grooves, at least four steel wire ropes encircle the upper testing wheel, the transition wheel and the lower testing wheel and are tested at the same time. By means of the fatigue test device for the elevator steel wire ropes, a plurality of steel wire ropes are tested at the same time under the same condition, the effect of the diameter differences of the steel wire ropes on the fatigue life of the steel wire ropes can be reflected, the operating actual situations of the steel wire ropes are more truthful, and the fatigue performance and the service life of the steel wire ropes can be reflected faithfully.

Description

technical field [0001] The invention relates to a fatigue testing device, in particular to a fatigue testing device for elevator wire ropes. Background technique [0002] In the elevator and elevator wire rope industry, the national standard for the inspection of ordinary elevator wire ropes does not stipulate that the fatigue life of the item must be tested. Some elevator manufacturers have begun to add fatigue performance detection indicators to the procurement standards. The main method is to put a steel wire rope on the fatigue testing machine. Repeated movement, until the number of times of operation reaches 600,000 times, check the number of broken wires, or evaluate the number of times of operation until the wire rope reaches the scrapping standard, such as the utility model patent (name: wire rope reliability testing machine, patent number: 200920283857.3) discloses such a method A test device. There is a big gap between this test method and the actual running state...

AI Technical Summary

Problems solved by technology

There is a big gap between this test method and the actual running state of the elevator. The main reason is that this test method can only install one wire rope, but in the actual operation of the elevator, there are 6-8 traction wire ropes running at the same time. The diameter difference between the steel wire ropes has a direct impact on the actual service life of the steel wire ropes. The main reason is that the steel wire ropes are wound on the same traction sheave and run at the same angular velocity. If the speed is inconsistent, this will cause sliding friction between the wire rope and the traction sheave, resulting in early wire breakage of the wire rope. Therefore, the existing single wire rope fatigue test method cannot reflect the influence of the diameter difference of the wire rope on the fatigue of the wire rope, which is difficult to visualize Reflect the actual fatigue performance and service life of the wire rope

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