CAJ | 학술논문

四缸U型传动机构是斯特林发动机输出功率的核心部件，其设计的合理与否直接与斯特林发动机系统运行的稳定性、效率、寿命密切相关。基于四缸U型传动机构的特点，建立了传动机构动平衡配重的理论模型，获得了曲轴及输出轴上配重的质量和相位；进而基于多体动力学仿真平台，建立了4缸双作用斯特林发动机传动机构动力学仿真模型，为更真实地模拟曲轴实际运行状态，采用哑元及万向铰连接方法建立了曲轴等效模型，采用虚拟油膜的方法建立了滑动轴承支撑等效模型。动力学仿真结果表明：相比原传动机构模型，改进后的传动机构输出轴、左曲轴和右曲轴速度波动系数分别降低了11．5％、36．8％和34．4％；输出轴质心振动位移均值降低了20．0％；基座承受的动载荷均值降低了23．4％；验证了改进方案可行性和有效性，为斯特林机传动机构的设计提供一定的理论依据。
사항U형전동궤구시사특림발동궤수출공솔적핵심부건，기설계적합리여부직접여사특림발동궤계통운행적은정성、효솔、수명밀절상관。기우사항U형전동궤구적특점，건립료전동궤구동평형배중적이론모형，획득료곡축급수출축상배중적질량화상위；진이기우다체동역학방진평태，건립료4항쌍작용사특림발동궤전동궤구동역학방진모형，위경진실지모의곡축실제운행상태，채용아원급만향교련접방법건립료곡축등효모형，채용허의유막적방법건립료활동축승지탱등효모형。동역학방진결과표명：상비원전동궤구모형，개진후적전동궤구수출축、좌곡축화우곡축속도파동계수분별강저료11．5％、36．8％화34．4％；수출축질심진동위이균치강저료20．0％；기좌승수적동재하균치강저료23．4％；험증료개진방안가행성화유효성，위사특림궤전동궤구적설계제공일정적이론의거。
The four-cylinder U-shaped transmission mechanism is the core component of the output power of the Stirling engine. The rationality of its design is closely related to its operational stability, efficiency and life of the Stirling engine system. Based on the characteristics of the four cylinder U-shaped drive mechanism, this paper built the theoretical model of the dynamic balance analysis of the transmission mechanism in order to get the quality and the phase of the balance weight on the rotation axis. Then the dynamics simulation model of the four-cylinder doub-le-acting Stirling engine transmission mechanism was established through use of the multi-body dynamics simulation platform. In order to get a more realistic simulation of the crankshaft's actual operation conditions, this thesis estab-lished the crankshaft equivalent model with the dummy and universal hinge connection method, and the sliding bearing supported equivalent model with the virtual film method. The analysis results indicate that, compared with the original transmission mechanism model, the speed fluctuation coefficients of the output shaft and the crankshaft with the improved model are reduced by 11.5%, 36.8%and 34.4%, respectively;the vibration displacement of the center mass of the output shaft is decreased by 20.0%; the average dynamic load on the airframe is decreased by 23. 4%. The feasibility and effectiveness of the improvement program in this thesis has been verified, and as a result it can provide useful information for the design and operation of the Stirling engine's transmission mechanism.