D-Shaped Elastomer Sealing Ring for Disc Brake Gap Sealing
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Solution Overview
Problem
Existing sealing systems for electric motor vehicle disk brakes face challenges in durability and reliability due to external and internal stress factors such as weathering, corrosion, hydraulic pressure, and tribological conditions, leading to issues like wear, tear, and failure from overstressing, abrasive damage, and gap extrusion.
Innovation Solution
A partially symmetrical elastomer sealing ring with a 'D-shaped' cross section is designed to fit snugly into a sealing receptacle, providing a stable and durable seal by distributing pressure evenly and minimizing deformation, featuring a radially compressed outer periphery and a laterally applied back sector for robustness, and a dynamically stressed foot sector for high-pressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing ring is used in the brake housing, then the sealing system can be assembled, but it fails to provide durable and reliable sealing under complex stress conditions including weathering, corrosion, hydraulic pressure, and tribological effects
Solution Approach 1:
The sealing ring incorporates different material properties in different regions: the outer peripheral region contains reinforcement fibers for structural strength and gap extrusion resistance, while the inner peripheral region has enhanced sealing properties for effective gap sealing. This local differentiation allows the single component to simultaneously resist multiple harmful factors.
Solution Approach 2:
The sealing ring is constructed as a composite material system combining elastomer base material with reinforcement fibers (such as aramid, glass, or carbon fibers). This composite structure provides both the elasticity needed for sealing and the mechanical strength to withstand hydraulic pressure, corrosion, and tribological stress without failing.
2Duration of action of stationary object
If the sealing ring is made more robust to withstand high pressure and stress, then durability improves, but the complexity of the sealing system structure increases
Solution Approach 1:
The invention merges multiple sealing rings with different functions into a single integrated sealing element. The combined structure includes both the gap sealing function (inner peripheral region) and the structural reinforcement function (outer peripheral region with fibers) in one component, eliminating the need for separate sealing rings and reducing assembly complexity while extending service life.
Solution Approach 2:
The sealing ring is segmented into functional regions: an inner peripheral region for sealing and an outer peripheral region for structural support. This segmentation allows each region to be optimized for its specific function while maintaining overall system simplicity through a single integrated component.
3Reliability
If the sealing ring cross section is made asymmetric to improve sealing performance, then gap sealing capability improves, but manufacturing precision requirements increase
Solution Approach 1:
The sealing ring employs an asymmetric cross-sectional design where the inner peripheral region and outer peripheral region have different structural characteristics. The inner region is optimized for sealing contact while the outer region provides structural support. This asymmetry is intentionally designed into the mold, allowing standard manufacturing processes to produce the asymmetric shape without requiring post-manufacturing adjustment or ultra-precise tolerances.
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 elastomer sealing ring effectively seals gaps under complex stress conditions, reducing the risk of damage from pulsating pressure and ensuring a durable, robust sealing system that withstands hydraulic overloading and maintains efficient brake actuation.
Implementation Method 1
a sealing system, for an electric motor vehicle disk brake has an actuating element mounted in a housing compartment. The sealing system has multilateral interfaces and the elastomer sealing ring, including a bearing, in a sealing receptacle the elastomer sealing ring blocks at least one or more sealing gap(s)
Data Source
AI summary
An elastomer sealing ring and to a sealing system for an electric motor vehicle disk brake, has an actuating element removeably mounted in a housing compartment. The sealing system has multilateral interfaces and the elastomer sealing ring including a bearing, in a sealing receptacle the elastomer sealing ring blocks at least one or more sealing gap(s) between a brake housing and the actuating element concentrically with respect to the actuating element and laterally next to a cavity. The elastomer sealing ring/sealing are suitable and intended for electrically actuatable motor vehicle disk brakes. The elastomer sealing ring has a partially symmetrical elastomer sealing ring cross section and in cooperation with interfaces, a gap seal adapted is made possible.