Guide Shoe Weight Design for Passenger Conveyor Noise Suppression
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Solution Overview
Problem
In passenger conveyor systems, guide shoes made of low-friction materials initially suppress sliding noise but over time, as the friction coefficient increases, noise generation is not continuously controlled due to increased friction vibration.
Innovation Solution
A guide shoe design incorporating a base portion with weights made of materials having a specific gravity greater than the base portion material, which are strategically positioned to increase the mass at the mass point, thereby reducing friction vibration and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If guide shoes are made of low-friction material, then sliding noise is suppressed initially, but friction coefficient increases over time causing noise to return
Solution Approach 1:
The invention changes the physical parameter of mass by adding weights to the guide shoe. This increases the inertial force that suppresses friction vibration, maintaining noise suppression even as the friction coefficient increases over time. The weight compensation mechanism allows the system to maintain performance despite material degradation.
Solution Approach 2:
The invention adds a weight component that replicates or compensates for the diminishing noise-suppression effect of the low-friction material. As the material's effectiveness decreases, the weight component provides the necessary inertial force to maintain overall noise suppression performance.
2Object-generated harmful factors
If guide shoes are made of low-friction material, then sliding noise is suppressed, but friction vibration increases over time
Solution Approach 1:
The invention compensates for the changing friction coefficient by introducing a constant mass element (weight). This weight provides stable inertial force that counteracts the increasing friction vibration, maintaining system stability despite material degradation over time.
3Object-generated harmful factors
If weights are added to guide shoe, then friction vibration is suppressed, but device complexity increases
Solution Approach 1:
The weight is integrated with the guide shoe structure, merging two components (guide shoe and weight) into a single assembled unit. This reduces overall system complexity compared to having separate adjustable weight mechanisms, while still achieving vibration suppression through the added mass.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively suppresses sliding noise over a long period by increasing the mass of the guide shoe, reducing friction vibration, and stabilizing the sliding state, ensuring continuous noise reduction during conveyor operations.
Implementation Method 1
the weight containing a material having a specific gravity larger than a specific gravity of a material of the base portion is provided to the base portion to increase a mass at a mass point
Data Source
AI summary
Provided is a guide shoe for a passenger conveyor, including: a base portion to be slid across a skirt guard provided along a moving direction of a plurality of steps that are movably provided; and a weight containing a material having a specific gravity larger than a specific gravity of a material of the base portion, which is provided to the base portion.