Torque Converter Turbine Shell With Integrated Torsional Vibration Damping
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Solution Overview
Problem
Existing torque converters face challenges in reducing torsional vibration due to separate vibration damping devices that require additional parts, complex installation processes, and occupy significant axial space, making them less compact.
Innovation Solution
A torque converter design that integrates a vibration damping device directly onto the turbine shell with a flange portion, allowing the mass to swing relative to the turbine shell and apply a counteracting torque, reducing the need for additional parts and simplifying installation, while maintaining a compact structure by offsetting the damping device radially.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate vibration damping device is installed on the turbine shell, then the torsional vibration can be reduced, but the device complexity and installation complexity increase
Solution Approach 1:
The vibration damping device is integrated directly into the turbine shell as an integral component. The turbine shell includes a support portion supporting the turbine blades and a flange portion extending radially outward, with the vibration damping device mounted on the flange portion. This merging eliminates the need for separate mounting brackets, additional fasteners, and complex assembly procedures, thereby reducing device complexity while maintaining vibration damping functionality.
2Object-affected harmful factors
If a separate vibration damping device is installed on the turbine shell, then the torsional vibration can be reduced, but the installation process becomes complicated
Solution Approach 1:
The turbine shell is designed as an integrated structure where the support portion and flange portion are formed as one piece. The vibration damping device is directly mounted on the flange portion, eliminating the need for separate mounting operations. This integration simplifies the installation process to basic mounting steps while ensuring proper positioning and structural strength.
3Object-affected harmful factors
If a vibration damping device is added to the torque converter, then the torsional vibration can be reduced, but the axial space is occupied
Solution Approach 1:
The vibration damping device is positioned on the flange portion that extends radially outward from the support portion. By utilizing the radial dimension instead of extending in the axial direction, the design accommodates the vibration damping device without increasing the axial length of the torque converter. This dimensional repositioning maintains a compact axial profile while providing effective vibration damping.
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 integration effectively reduces torsional vibration, improves installation convenience, and enhances the overall compactness of the torque converter, leading to improved fuel economy and reduced noise and vibration.
Implementation Method 1
the mass of the vibration damping device will swing relative to the turbine shell under the effect of inertia and apply a torque in the opposite direction onto the turbine shell
Data Source
AI summary
A torque converter includes a pump shell having pump blades; a turbine shell having a support portion supporting turbine blades, wherein the turbine blades are driven by the pump blades via a fluid to rotate about a rotational axis. The turbine shell further has a flange portion extending outward at the radially outside of the support portion and is integrally formed with the support portion. The torque converter further comprises a vibration damping device, the mass of which is mounted on the flange portion and configured to be movable relative to the flange portion and apply a torque to the turbine shell, thereby damping the torque vibration on the turbine shell. In addition, the invention also discloses a vehicle comprising the torque converter.