Torsionally Elastic Coupling With Fabric-Reinforced Buffer Elements
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Solution Overview
Problem
Existing torsionally elastic couplings experience material cracks due to tensile stresses, particularly with increased power density, leading to production downtime and costs.
Innovation Solution
Incorporating a woven fabric insert as a contact surface on the buffer elements to absorb tensile stresses, enhancing the load-bearing capacity and preventing material cracks, allowing higher torque transmission without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power density of the installation is increased, then the torque transmission capability is improved, but the tendency for cracks to form in the buffer element material increases
Solution Approach 1:
The buffer element is constructed as a composite structure consisting of a base material (elastomer or nitrile rubber) and a woven fabric insert. The woven fabric insert has higher tensile strength than the base material and is specifically positioned at the contact surfaces with the radial webs. This composite construction allows the coupling to transmit higher torques (increased power density) while the woven fabric insert absorbs the tensile stresses that would otherwise cause cracks in the base material, thereby maintaining reliability under high power conditions.
2Power
If higher torques are transmitted, then the power density is improved, but the risk of cracks forming in the buffer element increases
Solution Approach 1:
The buffer element incorporates a woven fabric insert made of material with higher tensile strength than the base material. This insert is positioned at the contact surfaces with the radial webs where tensile stresses occur during torque transmission. When higher torques are transmitted, the woven fabric insert absorbs the increased tensile stresses through its superior strength properties, preventing crack formation in the base material and maintaining the buffer element's integrity under high torque conditions.
Solution Approach 2:
The woven fabric insert acts as an intermediary element between the base material and the radial webs. It mediates the stress transfer by absorbing tensile stresses that arise during torque transmission, thereby protecting the base material from direct stress exposure that would lead to crack formation. This intermediary layer enables higher torque transmission while maintaining crack resistance.
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 woven fabric insert effectively absorbs tensile stresses, preventing material cracks and enabling higher power density without compromising durability, thus improving the coupling's operational reliability.
Implementation Method 1
The tensile stresses introduced into the buffer element as a result of this are absorbed by way of the woven fabric insert
Implementation Method 2
the woven fabric insert to be largely fused with the base material of the buffer element
Data Source
AI summary
A torsionally elastic coupling for connecting a drive shaft to an output shaft includes a first coupling part, a second coupling part comprising axially directed drivers, and a plurality of dumbbell-shaped buffer elements. Each buffer element has two end buffers which are connected via a central region. The buffer elements are held on a circular arc of the first coupling part via the respective central region in slotted radial webs of the first coupling part, with the axially directed drivers of the second coupling part seated between adjacent ones of the buffer elements in an operating situation. A woven fabric insert forms a contact surface of the buffer elements in facing relationship to the radial webs.