Torque Converter Damper Flange Structure for Reliable Spring Loading
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Solution Overview
Problem
Existing torsional vibration dampers in hydrodynamic torque converters do not effectively manage the loading of spring devices, leading to inadequate isolation of torsional vibrations in motor vehicle drive trains.
Innovation Solution
A torsional vibration damper with an intermediate flange made of two axially spaced, interconnected lateral parts, featuring a centrifugal pendulum and helical compression springs arranged in a circumferential direction, where the springs are loaded by both the lateral parts and additional loading means to ensure reliable and multi-stage torque absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single intermediate flange is used to connect input and output parts, then the structure is simple, but the spring devices are not reliably loaded and torsional vibration isolation is inadequate
Solution Approach 1:
The intermediate flange is divided into two axially spaced lateral parts (first and second lateral parts). Each lateral part independently loads the spring devices, ensuring reliable torque absorption. This segmentation allows the spring devices to be effectively loaded from both axial directions, resolving the contradiction between structural simplicity and loading reliability.
Solution Approach 2:
The solution transitions from a single-plane intermediate flange to a multi-dimensional structure with lateral parts spaced axially apart. This dimensional change enables the spring devices to be loaded from multiple axial positions, improving reliability while maintaining reasonable structural complexity through the systematic arrangement of lateral parts and loading means.
2Adaptability or versatility
If the intermediate flange is designed for single-stage torque absorption, then the structure is simple, but it cannot effectively isolate vibrations across different engine operating conditions
Solution Approach 1:
The system is designed with dynamic adaptability through the two lateral parts that can independently engage and load the spring devices. This allows the torque absorption characteristic to change dynamically based on operating conditions, enabling effective vibration isolation across different engine phases while maintaining a relatively simple structural framework.
Solution Approach 2:
The loading means are configured to apply different forces to the spring devices depending on the operating phase. During start-up, one lateral part primarily loads the springs, while during normal operation, both lateral parts contribute to loading. This parameter change in loading distribution provides adaptability across different engine conditions without requiring a completely complex variable structure.
3Reliability
If additional loading means are added to the intermediate flange, then spring device loading is improved, but manufacturing complexity increases
Solution Approach 1:
The loading means are integrated with the two lateral parts of the intermediate flange, combining the functions of structural support and torque application. This merging reduces the number of separate components and simplifies manufacturing compared to having completely independent loading mechanisms, while still achieving reliable spring device loading through the coordinated action of lateral parts and integrated loading means.
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
Enhances torsional vibration isolation by providing a reliable and adjustable loading mechanism for the spring devices, improving the damper's performance across different engine oscillation modes and start-up phases.
Implementation Method 1
an intermediate flange which is arranged against a spring device, which acts in a circumferential direction, between the input part and the output part
Implementation Method 2
A centrifugal pendulum can be arranged on the intermediate flange to improve the torsional vibration isolation of the torsional vibration damper
Data Source
AI summary
A torsional vibration damper and a hydrodynamic torque converter comprising same is disclosed. The torsional vibration damper has an input part which can be rotated about a rotational axis (d) and an output part. An intermediate flange is arranged against a respective spring device, which acts in a circumferential direction, between the input part and the output part, and the intermediate flange is made of two axially spaced interconnected lateral parts, axially between which the input part and the output part are received. In order to improve the loading of the spring devices, the loading of the spring devices by means of the intermediate flange is at least partly provided by loading means arranged between the lateral parts.