The handrail is an important part of the escalator, which moves synchronously with the steps to ensure the safety of passengers. It is one of the common failures of escalator equipment that the handrail is out of synchronization with the step operation. If the handrail is not synchronized with the step operation or even stops running, passengers will fall down. In this paper, a failure case of the driving chain of the escalator handrail is analyzed macroscopically and microscopically. The research results show that the serious wear of the pin shaft and sleeve of the escalator handrail drive chain is the main reason for the handrail drive chain.
Electrical importance tomography (EIT) is a non-invasive technique that aims at reconstructing the internal tissue image of the human body. In this paper, the application of EIT technology in pressure equipment flaw detection is experimentally studied. This paper mainly studies the feasibility of applying EIT technology to temperature monitoring and location, pressure damage location and surface crack defect location. The results show that this method can better detect and locate damage.
Brake electromagnet is the core equipment of elevator braking system, and its reliability directly affects the safe operation of elevator and the personal safety of passengers. In this paper, the reliability of an in-service elevator brake plunger electromagnet is tested and analyzed. The results show that the minimum pull-in voltage on the sample side of the brake is too high, and the maximum release voltage and working temperature are normal. In the process of use, the plunger action at both ends is not synchronized, that is, there will be an obvious time difference when the drum on both sides releases the braking force.
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