Ball-Centered Compensating Coupling for High-Speed Offset Damping
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Solution Overview
Problem
Existing compensating couplings are not optimized for high-speed applications and often introduce imbalances and load peaks during operation, particularly when compensating for radial and axial offsets between rotating elements.
Innovation Solution
A compensating coupling design featuring a center coupling part with tubular shape and ball head centering, allowing tool-free assembly and disassembly, with a damping element made of fiber-reinforced plastic and adhesive overload couplings to manage torsional rigidity and electrical insulation, while compensating for both radial and axial offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional compensating couplings are used to compensate for radial and axial offsets, then the coupling can connect two shafts, but imbalances and load peaks are introduced during high-speed operation
Solution Approach 1:
The coupling is divided into three separate coupling halves (first, second, and third) that can be assembled independently. Each half can be individually balanced before assembly, preventing imbalances from being introduced during the assembly process. This segmentation allows for precise balancing of each component while maintaining the overall coupling functionality for compensating radial and axial offsets.
Solution Approach 2:
The coupling design changes the structural parameters by using a specific arrangement of coupling halves with defined degrees of freedom. The third coupling half is constrained in translation but allowed to rotate, creating a specific motion pattern that avoids load peaks during high-speed operation. This parameter change in the coupling mechanism eliminates the harmful vibrations and load variations that occur in conventional designs.
2Manufacturing precision
If complex assembly procedures are used to ensure precise alignment, then manufacturing precision is improved, but assembly time and complexity increase
Solution Approach 1:
The coupling halves are designed with self-aligning features that automatically ensure precise alignment during assembly without requiring complex external alignment procedures. The spherical or conical contact surfaces between coupling halves enable automatic centering and orientation, allowing workers to assemble the coupling quickly by simply fitting the components together in the correct sequence.
Solution Approach 2:
The coupling halves are pre-manufactured with precise geometric features (such as spherical surfaces, conical surfaces, or predefined mounting holes) that facilitate automatic alignment during assembly. This preliminary preparation of alignment features eliminates the need for time-consuming alignment procedures on the assembly line, as the components self-align when brought together in the correct assembly sequence.
3Object-affected harmful factors
If traditional coupling designs are used, then structural strength is maintained, but vibration damping is insufficient
Solution Approach 1:
The coupling introduces intermediate elements (such as spherical joints, conical surfaces, or elastic elements) between the shafts that act as mediators to dampen vibrations. These intermediary features allow for relative motion and energy dissipation while maintaining the torque transmission path, effectively reducing vibration transmission without compromising the overall structural strength and torsional rigidity of the coupling.
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
Enables simple assembly and disassembly, minimal imbalance, and effective damping of vibrations, with no load peaks at high speeds, suitable for high-speed spindle bearing tests.
Implementation Method 1
a center coupling part (4), which can be moved to a limited extent relative to the outer coupling parts (2, 3), wherein a form-fitting interaction in relation to torsion loads is provided between the center coupling part (4) and the outer coupling parts (2, 3). The center coupling part (4) is composed of a tube piece (7) in the form of a damping element
Implementation Method 2
both connections between the tube piece (7) and the tube end pieces (9, 10) are designed as overload couplings, the load capacity of which is determined by an adhesive (15), for example an epoxy resin adhesive, introduced between the tube piece (7) and the tube end pieces (9, 10)
Data Source
AI summary
A compensating coupling comprises two outer coupling parts, namely an input-side coupling part and an output-side coupling part, both of which are to be connected to rotatable elements, more particularly shafts, and a center coupling part, which can be moved to a limited extent relative to the outer coupling parts. The center coupling part is composed of: a tube piece in the form of a damping element; and two tube end pieces, which are fastened to the tube piece and which are each designed to be fitted onto one of the outer coupling parts in a centered manner by ball head centering.