Rotary Engine Dual-Slider Mechanism for Sealing
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Solution Overview
Problem
The Wankel rotary engine suffers from uneven force distribution due to its eccentric motion, leading to sealing issues, fuel leakage, and reduced efficiency, primarily because of the complex structure and rotor-shaped pistons causing deformation and vibration.
Innovation Solution
A rotary engine design featuring two combustion chambers with a crank dual-slider connecting rod mechanism and rotary casings that rotate synchronously, avoiding uneven force distribution by using a 180° phase angle and tapering spaces for improved sealing and combustion efficiency, along with sealing rings and compression springs for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If rotor-shaped pistons undergo eccentric motion in Wankel rotary engine, then the engine achieves simple structure and high power-to-weight ratio, but uneven force distribution causes seal plate deformation and sealing problems
Solution Approach 1:
The engine is divided into two independent combustion chambers (first and second combustion chambers) with separate compression mechanisms. Each combustion chamber has its own slider assembly and connecting rod system, allowing independent operation and force distribution. This segmentation eliminates the uneven force concentration on a single seal plate by distributing loads across two symmetrically arranged combustion chambers.
2Speed
If rotor-shaped pistons undergo eccentric motion, then rotary motion is achieved, but deformation and vibration occur leading to fuel leakage and combustion deterioration
Solution Approach 1:
The patent employs symmetric design rather than asymmetric eccentric motion. The two slider assemblies are positioned symmetrically with respect to the rotation axis, and the connecting rods are arranged to provide balanced force distribution. This symmetric configuration eliminates the asymmetric vibrations and deformations caused by eccentric motion while maintaining rotational capability.
Solution Approach 2:
The second slider assembly and its connecting rod system act as a counterbalance to the first slider assembly. The symmetric arrangement ensures that forces generated in one combustion chamber are balanced by equal and opposite forces in the other combustion chamber, eliminating net vibrations and deformations during operation.
3Reliability
If sealing problems occur in Wankel rotary engine, then fuel leakage and combustion deterioration result, but engine operation continues
Solution Approach 1:
The slider assemblies compress the gas mixtures in both combustion chambers before ignition occurs. This preliminary compression ensures proper mixture density and pressure, creating optimal conditions for complete combustion. The symmetric compression mechanism ensures both chambers are properly prepared simultaneously, preventing combustion deterioration before it can occur.
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 effectively addresses the sealing issues of the Wankel rotary engine by ensuring a uniform force distribution, reducing leakage, and enhancing combustion efficiency through improved sealing and gas utilization, resulting in a more efficient engine operation.
Implementation Method 1
the sliders are driven by a rotation of a crank to periodically compress a gas in the sliding grooves
Implementation Method 2
the rotary casings drive the main shaft to rotate through a combustion of a compressed combustible gas mixture in the combustion chambers
Data Source
AI summary
A rotary engine includes a housing, a crank dual-slider connecting rod mechanism, and rotary casings. The vertically arranged sliding grooves are provided in the housing. The crank dual-slider connecting rod mechanism is mounted on the housing. Sliders of the crank dual-slider connecting rod mechanism are respectively located in the sliding groove. The sliders are driven by a rotation of a crank to periodically compress a gas in the sliding grooves. The two rotary casings configured to rotate synchronously are mounted on an outer side of the housing. Each of the rotary casings is provided with a combustion chamber. Any of the rotary casings is in a transmission connection with a main shaft via a transmission system. The rotary casings drive the main shaft to rotate through a combustion of a compressed gas in the combustion chambers. The rotary engine achieves a good seal.