| 苏杰，孙梅云,董大伟，闫兵，华春蓉，汪自强.基于曲轴扭振谐次幅值特性的内燃机功率监测新方法[J].内燃机工程,2018,39(1):63-67. |
| 基于曲轴扭振谐次幅值特性的内燃机功率监测新方法 |
| A New Method of IC Engine Power Monitoring Based on the Harmonic Amplitude Characteristic of Crankshaft Torsional Vibration |
| DOI： |
| 关键词:内燃机 功率监测 角振动 谐次幅值 往复惯性力 |
| Key Words:IC engine power monitoring angular vibration harmonic amplitude reciprocating inertial force |
| 基金项目: |
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| 摘要:基于内燃机动力学和多缸内燃机轴系任意测点简谐角振动与各缸对应简谐力矩的关系式，推导了内燃机曲轴测点角振动响应与内燃机功率的关系式，提出了基于曲轴角振动谐次幅值实现内燃机在线有负荷测功的方法；基于线性叠加的原理，比较不同燃烧介质的大功率内燃机气体激振力矩和往复惯性力矩对曲轴测点处角振动特征谐次幅值的影响。对某天然气内燃机和某柴油机进行仿真和试验研究，特征谐次幅值曲线证明了理论的正确性；利用曲轴测点扭振角位移特征谐次幅值计算内燃机的实际运行功率，最大误差为3.5%。 |
| Abstract:Based on the engine dynamics and the relationship between the harmonic angular vibration at arbitrary crankshaft measuring points of a multi-cylinder engine and the harmonic torque of each cylinder, the correlation between the angular vibration response at the crankshaft measuring point and the engine power was derived, and an on-line measurement of engine power was developed based on the harmonic amplitude of crankshaft angular vibration. Moreover, according to the principle of linear superposition, the influence of the gas exciting moment and reciprocating inertia moment of a heavy duty engine on the characteristic order amplitude of angular vibration at the crankshaft measuring point was compared under different working media. The correctness of the proposed theory is proved by the characteristic order amplitude curve through the experimental study and simulation of a gas engine and a diesel engine, respectively. When using the characteristic order amplitude of the torsional angular displacement at the crankshaft, measuring point to calculate the actual operating power of the engine, the maximum deviation is 3.5%. |
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