Rotary Piston Engine Using Unidirectional Rolling Bearings
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Solution Overview
Problem
Classical internal combustion engines are inefficient and heavy, failing to meet the requirements of unmanned air vehicles due to high vibration, high fuel consumption, and short lifespan, while rotary engines suffer from eccentric shaft issues that lead to vibration and gear wear, lacking the ability to adjust power based on load.
Innovation Solution
An internal combustion engine design that eliminates the gear coupling system by using unidirectional rolling bearings to house two rotors, allowing concentric operation of shafts and enabling autonomous power adjustment based on load, with asymmetrical rotor structures to prevent sticking and enhance lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gear coupling system is used to provide eccentricity in rotary engines, then the pistons can achieve predefined periodical mechanical movement, but the system experiences high vibration and gear wear that reduces lifespan
Solution Approach 1:
The patent removes the gear coupling system entirely from the engine design. Instead of using gears to create eccentricity and control piston movement, the invention employs a direct unidirectional rolling bearing connection between the rotors and the output shaft, eliminating the source of vibration and wear while maintaining the necessary mechanical motion control
Solution Approach 2:
The patent introduces a unidirectional rolling bearing as an intermediary element between the rotors and the output shaft. This bearing provides the necessary mechanical connection and motion control without the complexity and wear issues of gear systems, acting as a smooth mediator that transfers rotational motion while preventing reverse rotation
2Reliability
If classical internal combustion engines are used, then they have longer lives, but they are heavy and run inefficiently with high fuel consumption
Solution Approach 1:
The patent replaces the traditional reciprocating piston mechanism with a rotary scissor-action piston mechanism. This substitution changes the fundamental mechanical approach from linear reciprocation to rotational scissor motion, reducing the number of conversion stages and mechanical losses, thereby improving efficiency while maintaining durability through the robust bearing-based support system
Solution Approach 2:
The patent changes the operational parameters by enabling the pistons to rotate at high speeds like turbine blades rather than moving in traditional reciprocating motion. This parameter change from slow reciprocation to high-speed rotation improves energy efficiency and power output while the bearing system ensures long operational life
3Productivity
If rotary engines with eccentric shafts are used, then they are smaller and more efficient, but they suffer from high vibration that reduces lifespan
Solution Approach 1:
The patent removes the eccentric shaft component entirely from the design. Instead of relying on eccentricity to create the necessary motion variations, the invention uses the unidirectional rolling bearing to directly control the rotational motion of the pistons, eliminating the vibration source while maintaining efficiency
Solution Approach 2:
The patent uses two rotors that are symmetric copies of each other, with each rotor having identical scissor-action piston mechanisms. This symmetry allows the vibrations from one rotor to be counterbalanced by the other, reducing overall vibration while maintaining the high efficiency of rotary motion
4Ease of operation
If gear coupling systems are used to provide eccentricity, then piston movement can be controlled, but the device complexity increases
Solution Approach 1:
The patent removes the complex gear coupling system and replaces it with a simple unidirectional rolling bearing. This extraction of the unnecessary gear components dramatically simplifies the overall device structure while retaining the essential function of controlling piston movement through the bearing's unidirectional rotation capability
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 design reduces vibration and gear wear, increases power transmission efficiency, and extends engine lifespan by allowing concentric power transmission and autonomous power adjustment, resulting in a lighter and more efficient engine.
Implementation Method 1
housing two rotors with the unidirectional rolling bearing
Implementation Method 2
enables lubrication
Implementation Method 3
asymmetrical rotor structures to prevent sticking
Implementation Method 4
internal combustion engine
Data Source
AI summary
An internal combustion engine, includes a 1st rotor having two blades, rotating in the circular volume of the motor body block with variable angular speed; a 2nd rotor having two blades, rotating in the circular volume of the motor body block with variable angular speed, a rolling bearing provided between the 1st rotor and the 2nd rotor enables rotation of the 1st rotor and the 2nd rotor on each other; a 1st unidirectional rolling bearing between the 1st rotor and the back cover enables rotation of the 1st rotor and the 2nd rotor at different times and at different extents; a 3rd unidirectional rolling bearing transferring the 2nd rotor's rotation movements to the output shaft is provided on the internal collar of the 2nd rotor; a 4th unidirectional rolling bearing transferring the 1st rotor's rotation movements to the output shaft is provided on the internal collar of the 1st rotor.