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    Why Do Escalator Handrails Move Faster?

    Why Do Escalator Handrails Move Faster?

    • Categories:NEWS
    • Author:Operation
    • Origin:Original
    • Time of issue:2023-08-29
    • Views:0

    (Summary description)Discover the intriguing phenomenon of escalator handrails moving faster than steps and the science behind it. Explore how gear mechanisms, materials, and other factors impact synchronization, and why a slight speed difference is maintained. Learn why handrails are often adjusted to be faster for safety reasons and how monitoring systems ensure passenger well-being. Delve into the world of escalator mechanics and embrace a deeper understanding of everyday physics.

    Why Do Escalator Handrails Move Faster?

    (Summary description)Discover the intriguing phenomenon of escalator handrails moving faster than steps and the science behind it. Explore how gear mechanisms, materials, and other factors impact synchronization, and why a slight speed difference is maintained. Learn why handrails are often adjusted to be faster for safety reasons and how monitoring systems ensure passenger well-being. Delve into the world of escalator mechanics and embrace a deeper understanding of everyday physics.

    • Categories:NEWS
    • Author:Operation
    • Origin:Original
    • Time of issue:2023-08-29
    • Views:0
    Information

    If you take escalators often, you may find that the handrails of the escalator often go a little faster than the escalator steps. Some people say that because the handrail is longer than the steps, it goes faster. Others say that the handrails are out of sync with the steps to prevent passengers from leaning on the handrail all the time. These are all plausible explanations.

    Why Do Escalator Handrails Move Faster?

    In fact, in an ideal state, it is best for the handrail and the steps to be completely synchronized.

     

    The power of the escalator handrail and steps usually comes from the same set of motors. The motor is connected to the upper steps and the handrail through gears, chains and other components to drive them to run. The drive mechanism is designed to synchronize the steps and handrails, but in practice the speeds of the two are often different.

     

    Specifically, the parts of the pedal system are made of metal, and the transmission is through tightly meshed gears and chains, so the speed is easy to control more accurately and stably. The escalator handrail belt is a rubber material with certain elasticity. Under the action of the tensioning mechanism, it is tightly wrapped on the transmission wheel by a certain tension force, and advances along with the rotation of the transmission wheel by relying on the friction force between the two. In the actual operation process, the handrail will inevitably have a slight degree of stretching and deformation after being stressed, will gradually wear out, and will also slip slightly due to oil stains or passengers’ pulling, etc. These factors will make the speed of the handrail changes that affect its synchronization with the rung. Therefore, it is not easy to keep the handrail and the steps in perfect synchronization. It is relatively easy to keep the handrail a little faster than the steps within a certain range.

     

    So, why must the handrail be faster than the steps? Relevant standards usually require that when a certain resistance is applied to the handrail, the speed should not become slower than the steps. As a result, the handrails are sometimes adjusted to run a little faster than the pedals to maintain some redundancy. In addition, if the handrail is slower than the steps, passengers holding on to the handrail will easily fall backwards, which is more dangerous. Relatively speaking, if the handrail is slightly faster than the pedal, the danger is less. my country's national standard stipulates that under normal operating conditions, the tolerance of the operating speed of the handrail relative to the actual speed of the steps and pedals is 0% to +2%.

     

    Due to the different installation, operation and maintenance conditions of the actual elevator, sometimes the handrail is slightly slower than the steps. Many escalators are now equipped with handrail speed monitoring systems. According to national standards, when the speed of the handrail is lower than the actual speed of steps, pedals, etc. by more than 15% and lasts for more than 15 seconds, the escalator should be stopped to ensure safety.

     

    When you take the escalator next time, you can pay more attention to the wonderful experience brought by this speed difference, and even in daily life, think more about some unusual phenomena and study the scientific principles of their existence.

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