Spring-Applied Brake With Sintered Friction Surfaces for Heat Tolerance
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Solution Overview
Problem
Existing spring-applied brakes face challenges in achieving improved temperature tolerance and a more compact design, as they often rely on organic friction linings that are sensitive to temperature and wear.
Innovation Solution
The design incorporates two metallic friction pairings, with at least one friction partner featuring a sintered material surface, specifically on the anchor plate or brake disc, to enhance friction energy, torque stability, and temperature tolerance, allowing for a more compact and reliable braking system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If organic friction linings are used in spring-applied brakes, then the brake can achieve sufficient frictional engagement, but the temperature tolerance is reduced and the design becomes less compact
Solution Approach 1:
The patent changes the material parameter from organic friction lining to sintered material, which fundamentally alters the thermal and mechanical properties. This parameter change enables the brake to withstand higher temperatures and allows for a more compact design while maintaining sufficient frictional engagement capability
Solution Approach 2:
The patent employs sintered material, which is a composite material formed by sintering metal particles. This composite structure provides both high temperature tolerance and compact design characteristics, resolving the contradiction between thermal resistance and compactness
2Reliability
If organic friction linings are used, then frictional engagement is achieved, but wear resistance and thermal stability deteriorate
Solution Approach 1:
The patent changes the material composition from organic to sintered material, which fundamentally improves both wear resistance and thermal stability. The sintered material's metallurgical structure provides superior durability and heat resistance compared to organic linings
3Force
If friction linings are used to ensure sufficient frictional engagement, then braking performance is achieved, but the overall design becomes less compact
Solution Approach 1:
The patent changes the friction material parameter from organic lining to sintered material, which has higher density and friction coefficient. This allows for reduced material thickness while maintaining sufficient frictional engagement, thereby achieving a more compact brake design
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 maximizes permissible friction energy, ensures excellent torque stability, and increases temperature tolerance, preventing wear and thermal failures, while enabling a more compact and precise braking system with improved operational safety.
Implementation Method 1
The frictional connection created when the electromagnet coil is de-energized leads to the braking disc being stopped
Implementation Method 2
the compression spring elements press the armature plate against the flange, clamping the brake disc
Implementation Method 3
When the coil is energized, the magnet housing of the electromagnet becomes magnetized. As a result, the armature plate is magnetically attracted to the magnet housing
Implementation Method 4
the armature plate is magnetically attracted to the magnet housing, opposing the force exerted by the compression spring elements on the armature plate
Data Source
Figure 1
Figure 2
AI summary
The invention relates to an electromagnetically actuated spring-applied brake, comprising a brake disc (2) arranged on a shaft in a rotationally fixed but axially displaceable manner, an electromagnet (3) comprising a magnet housing (4) and a coil (5) received therein, an armature plate (7) arranged axially displaceably between the brake disc (2) and the magnet housing (4), and a flange (8) arranged in a rotationally fixed manner on the magnet housing (4), wherein the brake disc (2) and the armature plate (7) are arranged between the flange (8) and the magnet housing (4), and wherein the armature plate (7) is arranged on the magnet housing (4) in a rotationally fixed but axially displaceable manner relative to the magnet housing (4) by means of compression spring elements (14), wherein metallic friction pairs (19, 20) are provided between the brake disc (2) and the flange (8) on the one hand and between the brake disc (2) and the armature plate (7) on the other hand, characterized in thatthat one friction partner of one of the two friction pairs (19, 20) provides a friction surface equipped with sintered material.