Disc Brake Pad Groove Layout for Stable Elevator Braking
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Solution Overview
Problem
In elevator devices with disc brake systems, high braking energy generates excessive frictional heat, leading to gas and wear debris formation, which destabilizes frictional characteristics and requires effective removal without compromising brake pad strength.
Innovation Solution
The design incorporates brake pads with intersecting linear grooves, where one groove extends through the center and others are formed perpendicular to the sliding contact direction, allowing for quick discharge of gas and debris while maintaining pad strength by positioning grooves to avoid the center and facilitate gravity-driven debris removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grooves are formed on the brake pad to remove gas and wear debris, then frictional characteristics are stabilized, but the strength of the brake pad is reduced
Solution Approach 1:
The brake pad is designed with grooves only in specific regions (non-central areas) rather than uniformly across the entire pad. This localized groove configuration removes gas and wear debris from critical friction zones while preserving the structural integrity and strength of the overall brake pad material.
Solution Approach 2:
The groove configuration employs asymmetric positioning relative to the brake pad center, with grooves strategically placed in peripheral regions. This asymmetric design optimizes debris removal efficiency while maintaining symmetric load distribution and structural strength during braking operations.
2Loss of time
If braking force is increased to stop the elevator, then stopping time is reduced, but frictional heat and temperature rise are increased
Solution Approach 1:
The grooves in the brake pad convert the harmful accumulation of gas and wear debris into a beneficial self-cleaning mechanism. As the brake pad rotates during braking, the grooves automatically eject accumulated debris and gas, preventing friction characteristic degradation and enabling sustained high-braking-force operation without temperature-induced performance loss.
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 configuration effectively removes gas and wear debris from the brake pad's center, stabilizing frictional characteristics and maintaining braking performance in high-speed elevator applications.
Implementation Method 1
allowing for quick discharge of gas and debris while maintaining pad strength by positioning grooves to avoid the center and facilitate gravity-driven debris removal
Data Source
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AI summary
An elevator device including a disc brake system capable of quickly removing gas and wear debris generated from the vicinity of the center of a brake pad without lowering the strength of the brake pad to provide stable frictional characteristics is provided. The elevator device of the present invention is characterized in that a brake pad of a disc brake system has one linear groove formed to extend through substantially the center of the brake pad, and two other linear grooves formed to be perpendicular to the one linear groove and face each other with the center therebetween at positions away from the center, and that either of the one linear groove and the two linear grooves is/are formed along a sliding contact direction of the brake pad and a brake disc.