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%。
Based on the engine dynamics and the relationship between the harmonic angular vibration at arbitrary crankshatt 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 ofthe gas exciting moment and reciprocating inertia moment of a heavy duty engine on the chaamplitude of angular vibration at the crankshaft measuring point was compared under different workingmedia. 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 tocalculate the actual operating power of the engine,themaximum deviation is 3. 5 U.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2018年第1期63-67,共5页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
功率监测
角振动
谐次幅值
往复惯性力
IC engine
power monitoring
angular vibration
harmonic amplitude
reciprocating inertial force
