Hydraulic Coupling Damping Structure for Stable Roller Torque Attenuation
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Solution Overview
Problem
Existing damping systems for hydraulic coupling devices are complex, large, and ineffective in attenuating torque fluctuations due to unbalanced pendulous mass distribution and unstable roller movement.
Innovation Solution
A damping system that utilizes the turbine housing itself to dampen torque fluctuations by incorporating a roller that moves along tracks on both the output hub and the turbine section, with a mass plate connected to the turbine section to ensure uniform mass distribution and stable movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate damping device is used in the hydraulic coupling device, then the damping function is provided, but the structure becomes complicated and the axial space occupied increases
Solution Approach 1:
The patent integrates the damping function directly into the turbine housing structure by forming a damping cavity within the housing itself, eliminating the need for separate damping devices. The turbine housing serves dual purposes: structural support and damping torque fluctuations, thereby reducing overall device complexity while maintaining the damping function.
Solution Approach 2:
The turbine housing is designed to perform multiple functions simultaneously: it provides structural support for the hydraulic coupling device and incorporates a damping cavity that actively dampens torque fluctuations. This multi-functionality reduces the number of separate components needed, simplifying the overall structure.
2Reliability
If a separate damping device is used in the hydraulic coupling device, then the damping function is provided, but the axial space occupied increases
Solution Approach 1:
The damping cavity is nested within the turbine housing structure, utilizing the existing spatial envelope of the housing. This nesting approach allows the damping function to be accommodated within the existing axial dimensions of the hydraulic coupling device, avoiding additional axial extension.
3Ease of operation
If pendulous masses are distributed unevenly on the two sides of the roller, then the turbine disk can move relative to the output member, but unbalanced and unstable movement and even seizure of the roller occur
Solution Approach 1:
The patent intentionally introduces asymmetry in the form of counterweights positioned on opposite sides of the roller axis. These counterweights are specifically designed to balance the pendulous masses, creating a symmetric mass distribution that prevents unbalanced movement and roller seizure while maintaining the necessary relative movement capability.
4Device complexity
If no stop member is provided, then the structure is simpler, but the relative displacement stroke between the turbine disk and the output hub is not effectively limited
Solution Approach 1:
The stop members are integrated directly into the turbine housing structure rather than being separate components. This integration maintains structural simplicity while providing effective limitation of the relative displacement stroke between the turbine disk and output hub, ensuring reliable operation.
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 proposed damping system effectively attenuates torque fluctuations, reduces the number of components and manufacturing complexity, and achieves a more compact design while ensuring smooth roller movement and improved damping efficiency.
Implementation Method 1
a roller that can roll along a roller track defined by the first track and a corresponding second track
Implementation Method 2
each turbine mass assembly comprising a turbine section... the sub-portions of the turbine disk can be used as pendulous masses to attenuate the torque fluctuation
Data Source
AI summary
In a damping system for a hydraulic coupling device includes an output hub having a central axis and an annulus which surrounds the central axis, first tracks are arranged in the annulus, and a plurality of turbine mass assemblies are uniformly distributed around the central axis. Each turbine mass assembly comprises a turbine section carrying a plurality of blades and being provided with a second track corresponding to a respective first track. A roller can roll along a roller track defined by a first track and a corresponding second track so that the turbine mass assembly can move relative to the output hub and exert torque on the output hub. Each turbine mass assembly further comprises a mass plate fixedly connected to the turbine section, the output hub being arranged between the mass plate and the turbine section.