Centrifugal Pendulum Separation in Fluid-Filled Torque Couplings
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Solution Overview
Problem
Existing torque transmission devices in motor vehicle drive trains face challenges in effectively isolating torsional vibrations and minimizing mutual disturbances between centrifugal pendulums due to fluid movement, such as splash effects, which can disrupt the operation of centrifugal pendulums in a fluid environment.
Innovation Solution
A torque transmission device featuring at least two centrifugal pendulums with sets of pendulum masses distributed over the circumference, utilizing self-aligning bearings and a fluidically active separating means made of metal or plastic to prevent fluidic disturbances between pendulum sets, allowing for independent pendulum movement and torsional vibration isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centrifugal pendulums are arranged in a fluid-filled housing for torque transmission, then torque transmission and torsional vibration isolation are achieved, but fluid movement causes splash effects that disturb pendulum operation
Solution Approach 1:
The housing is divided into multiple fluid-tight compartments, each containing a centrifugal pendulum. The compartments are separated by partition walls that prevent fluid movement between pendulum zones, eliminating splash effects while maintaining the beneficial fluid environment for torque transmission within each compartment.
Solution Approach 2:
Partition walls act as intermediaries between the fluid environment and the pendulums. These walls allow the pendulums to operate in a controlled fluid atmosphere within their compartments while preventing harmful fluid movement and splash effects from affecting pendulum operation.
2Reliability
If multiple centrifugal pendulums are arranged in the housing for enhanced vibration isolation, then torsional vibration isolation improves, but mutual disturbances between pendulum sets increase
Solution Approach 1:
Multiple centrifugal pendulums are placed in separate fluid-tight compartments within the housing. Each pendulum operates independently in its own compartment, eliminating mutual disturbances between pendulum sets while maintaining enhanced torsional vibration isolation through the combined effect of multiple pendulums.
3Productivity
If the housing is filled with fluid for torque transmission, then torque transmission efficiency improves, but fluid movement creates harmful splash effects
Solution Approach 1:
The fluid-filled housing is segmented into multiple compartments, each containing a pendulum. Fluid can move freely within each compartment to enable efficient torque transmission, but the partition walls prevent harmful splash effects from affecting other pendulums or system components.
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 solution effectively reduces mutual disturbances between pendulum sets, enhancing the isolation of torsional vibrations and maintaining efficient torque transmission in a fluid environment, thereby improving the overall performance of the torque transmission device.
Implementation Method 1
each having a set of pendulum masses distributed over the circumference, in which predetermined pendulum paths are arranged to be displaceable in the centrifugal field along the torque transmission device rotating about the axis of rotation
Implementation Method 2
the torque transmission device has a housing which is at least partially filled with a fluid, for example oil, water, pressure medium, or the like
Data Source
AI summary
A torque transmission device is disclosed having a housing that is rotatable about an axis of rotation (d) and is at least partially filled with fluid and a centrifugal pendulum device having at least two centrifugal pendulums arranged in the housing, each having a set of pendulum masses arranged to be distributed over the circumference, which are displaceably arranged along predetermined pendulum tracks in the centrifugal force field of the torque transmission device. To at least reduce a mutual influence of the at least two sets of pendulum masses, a fluidically active separating member is provided between the at least two sets of pendulum masses.