Opposed Slider-Crank Engine Balancing for Multi-Order Vibration
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Solution Overview
Problem
Existing engine balancing systems fail to effectively eliminate first-order, second-order, and higher-order vibrations caused by the reciprocating motion of pistons, leading to discomfort, equipment damage, and reduced service life, especially in applications requiring high comfort levels or significant vibration damping.
Innovation Solution
An engine balancing system incorporating at least two oppositely arranged slider-crank mechanisms with specific ratios of connecting rod lengths and crank eccentricities, phase angle differences, and a counterweight connected through auxiliary rods to balance inertial forces, ensuring constant acceleration ratios and opposite inertial forces to eliminate vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple counterweight assemblies are added to balance higher-order vibrations, then vibration balancing capability is improved, but device complexity increases
Solution Approach 1:
The invention merges multiple counterweight assemblies onto a single crankshaft structure, integrating the balancing function into the existing engine architecture. The counterweight assemblies are positioned at different angular locations on the same crankshaft, combining multiple functions into a unified structure rather than adding separate independent components
Solution Approach 2:
The crankshaft serves multiple functions: it converts piston motion to rotational motion and simultaneously supports multiple counterweight assemblies that balance vibrations of different orders. This multi-functional design allows the crankshaft to handle both power transmission and vibration balancing without requiring additional dedicated components
Data Source
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AI summary
An engine balancing system includes an engine body. At least two slider-crank mechanisms are provided inside the engine body. One of the slider-crank mechanisms is arranged opposite to the other slider-crank mechanism. A slider in one of the slider-crank mechanisms is moved at a speed and acceleration similar to a speed and acceleration of a slider in the other slider-crank mechanism. The balancing system can effectively eliminate first-order, second-order and higher-order vibrations generated during engine operation, thus reducing the probability of equipment damage.