Composite Elevator Brake Disc for Heat and Wear Resistance
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Solution Overview
Problem
Elevator brakes face high wear and overheating issues due to large frictional forces when braking fast-moving elevator cars, leading to potential component damage and reduced safety.
Innovation Solution
A brake disc made of a metal matrix composite comprising an aluminum alloy, silicon carbide, and redmud, combined with a polyamide casing and an electromagnet configuration, allows for efficient heat dissipation and distribution, enabling high-speed braking without overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large braking forces are applied using frictional forces, then the elevator car can be braked in a short period of time, but high temperatures are generated causing component damage
Solution Approach 1:
The brake disc is made from a composite material consisting of aluminum alloy and silicon carbide particles. The aluminum alloy matrix provides high thermal conductivity for heat dissipation, while the silicon carbide particles enhance wear resistance and maintain structural integrity under high temperature conditions. This composite structure enables the brake to withstand high temperatures generated during rapid braking without component damage.
2Productivity
If large braking forces are applied using frictional forces, then the elevator car can be braked in a short period of time, but high wear of components occurs
Solution Approach 1:
The silicon carbide particles dispersed in the aluminum alloy matrix provide exceptional wear resistance. These hard particles reinforce the brake disc structure, reducing material loss during friction-based braking operations while maintaining the high braking force capability needed for rapid deceleration.
3Ease of manufacture
If conventional materials are used for the brake disc, then manufacturing is simpler, but the brake overheats during high-speed braking
Solution Approach 1:
The invention changes the material parameters by selecting an aluminum alloy with high thermal conductivity and incorporating silicon carbide particles. This material parameter change enables effective heat dissipation during high-speed braking, preventing overheating while maintaining manufacturability through established composite material fabrication processes.
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
The solution provides a long-lasting, cost-effective elevator brake with high braking capacity, reducing wear and ensuring safe operation by effectively managing heat and frictional forces during high-speed braking.
Implementation Method 1
A brake disc according to an exemplary embodiment further has low wear and allows for a good and fast distribution and dissipation of heat generated when the elevator brake is operated
Implementation Method 2
As the elevator brakes usually use frictional forces for braking the elevator car
Data Source
AI summary
An elevator brake (20) has at least one brake disc (30) comprising a metal matrix composite, the metal matrix composite including at least an aluminum alloy and silicon carbide. The metal matrix composite in particular comprises Aluminum 6061, silicon carbide and redmud.