车用发动机
車用髮動機
차용발동궤
2014年
1期
32-37
,共6页
李晓磊%刘建敏%乔新勇%李晓伟%张杰
李曉磊%劉建敏%喬新勇%李曉偉%張傑
리효뢰%류건민%교신용%리효위%장걸
柴油机%活塞敲击%振动信号%装配间隙%动力学模型
柴油機%活塞敲擊%振動信號%裝配間隙%動力學模型
시유궤%활새고격%진동신호%장배간극%동역학모형
diesel engine%piston slap%vibration signal%fit-up gap%dynamic model
以某12150柴油机为研究对象，通过分析活塞的受力情况，建立了活塞敲击的动力学模型；完成了柴油机台架试验，并同步采集了缸内压力及机体振动信号；通过分析机体振动信号的时频特性及柴油机工作时序验证了敲击模型的准确性；基于此模型，分别研究了柴油机转速、负荷、温度以及活塞装配间隙对活塞敲击时刻及敲击动能的影响，揭示了活塞敲击激励与活塞装配间隙及转速等因素的本质联系，为利用振动信号监测缸套磨损状况提供了理论基础。
以某12150柴油機為研究對象，通過分析活塞的受力情況，建立瞭活塞敲擊的動力學模型；完成瞭柴油機檯架試驗，併同步採集瞭缸內壓力及機體振動信號；通過分析機體振動信號的時頻特性及柴油機工作時序驗證瞭敲擊模型的準確性；基于此模型，分彆研究瞭柴油機轉速、負荷、溫度以及活塞裝配間隙對活塞敲擊時刻及敲擊動能的影響，揭示瞭活塞敲擊激勵與活塞裝配間隙及轉速等因素的本質聯繫，為利用振動信號鑑測缸套磨損狀況提供瞭理論基礎。
이모12150시유궤위연구대상，통과분석활새적수력정황，건립료활새고격적동역학모형；완성료시유궤태가시험，병동보채집료항내압력급궤체진동신호；통과분석궤체진동신호적시빈특성급시유궤공작시서험증료고격모형적준학성；기우차모형，분별연구료시유궤전속、부하、온도이급활새장배간극대활새고격시각급고격동능적영향，게시료활새고격격려여활새장배간극급전속등인소적본질련계，위이용진동신호감측항투마손상황제공료이론기출。
The dynamic model of piston slap for a 12150 diesel engine was built by analyzing the stress of piston .Based on the bench test of diesel engine ,the in-cylinder pressure and body vibration signals were collected .The accuracy of slap model was verified according to the time-frequency characteristic of body vibration signal and diesel engine operating sequence .With the model ,the influences of engine speed ,load ,temperature and piston fit-up gap on piston slap timing and slap kinetic energy were researched .Finally ,the relations between the piston slap excitation and the piston fit-up gap as well as engine speed were revealed ,which brought the theoretical basis for monitoring the liner wear with the vibration signal .
