| 摘要:针对某型柴油机在首次动车试验时发生阀桥导柱与阀桥咬死故障，对进气阀桥-阀桥导柱进行拆检，并从设计、加工与装配等3方面进行分析。结果表明:该组件在设计时，阀桥-阀桥导柱的材料匹配不理想，润滑结构设计不合理，配合间隙偏小是造成本次故障的原因。据此进行改进。改进后的阀桥导柱经实机试验验证，未再发生任何故障。改进措施有效。 |
| 关键词: 柴油机 阀桥导柱 材料 润滑 配合间隙 |
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| Failure Analysis and Improvement on Valve Bridge Guide Postof a Diesel Engine |
| Jiang Jiukui,Liang Gang,Tian Yusheng |
| Shanghai Marine Diesel Engine Research Institute, Shanghai 201108 |
| Abstract:Aiming at the seizure failure of valve bridge guide post and valve bridge in the first start-up test of a diesel engine, the intake valve bridge-valve bridge guide post was disassembled and inspected. Analysis was carried out from three aspects of design, processing and assembly. The results showed that the main reasons of the failure included:the material matching of valve bridge-valve bridge guide post was not ideal, the lubrication structure design was unreasonable, and the matching clearance was too small. Improvement was carried out accordingly. The improved valve bridge guide post was verified by real engine test, and no failure occured again. The improvement measures were verified to be effective. |
| Key words: diesel engine valve bridge guide post material lubrication fit clearance |
