通用小型汽油机振动性能及其生产一致性影响因素分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 188-192.

论文

通用小型汽油机振动性能及其生产一致性影响因素分析

刘胜吉 1 ，孙健 1 ，李志丹 2 ，王建 1 ，刘伟1

作者信息 +

Analyses of Small Non-road SI Engine’s Vibration Performance and Conformity of Production

LIU Sheng-ji1， SUN Jian1， LI Zhi-dan2， WANG Jian1， LIU Wei1

Author information +

文章历史 +

摘要

通用小型汽油机振动性能影响配套机器的使用性能和可靠性。以168F汽油机为例，在试验研究基础上，使用工程软件对汽油机振动性能进行模拟分析，得出此类汽油机因活塞、连杆用铝合金制造且连杆大小头内无轴套（瓦），质量较轻、往复运动的惯性力小，曲轴平衡块的尺寸偏差对往复惯性力的平衡量值影响较大，造成批量生产的整机振动性能较差。168F汽油机计算结果表明：原机曲轴平衡块在外圆尺寸公差值内变化，整机当量振动烈度在56.0到102.8mm/s范围内变动；曲轴平衡块外圆面经机械加工、平衡块半径优化为42.43±0.15mm后，整机当量振动烈度在56～64.1mm/s范围内，较原机有显著改善。得出了曲轴平衡块外圆尺寸公差控制是有效控制无轴平衡的通用小型汽油机整机振动性能及其生产一致性的关键。

Abstract

Small non-road SI engine’s vibration performance affects the using performance and reliability of the supporting machine. The 168F gasoline engine was taken for example. Simulation analyze of gasoline engine’s vibration performance using the engineering software were performed based on experimental study. Come to the conclusion that such gasoline engines are lighter and the reciprocating inertia force is small because they are made of aluminum alloy and there are no sleeves (Bearings) in connecting rod; The size’s deviation of the crankshaft balance block has a larger effect on the balance value of reciprocating inertia force which causing the poor performance of the whole production. The 168F gasoline engine’s calculation results show that when the original cylindrical dimension changed among the tolerance value, the equivalent vibration intensity ranged from 56 to 102.8mm/s; When the cylindrical surface of crankshaft balanced block was machined and the radius was optimized to 42.43 ± 0.15mm，the equivalent vibration intensity changed from 56 to 64.1mm/s, which had a significantly improvement compared to the original. Draw the conclusion that the control of dimensional tolerances is vital to control the non-shaft balance single-cylinder engine’s vibration performance and conformity of production.

导出引用

刘胜吉 ;孙健 ;李志丹 ;王建 ;刘伟. 通用小型汽油机振动性能及其生产一致性影响因素分析[J]. 振动与冲击, 2014, 33(12): 188-192

LIU Sheng-ji;SUN Jian;LI Zhi-dan;WANG Jian;LIU Wei. Analyses of Small Non-road SI Engine’s Vibration Performance and Conformity of Production[J]. Journal of Vibration and Shock, 2014, 33(12): 188-192