商用车空压机容积流量衰减分析与改进

Analysis and Improvement on the Attenuation of Volume Flow for Commercial Vehicles Air Compressor

对影响商用车空压机容积流量等性能指标衰减的因素进行研究。耐久试验后,对阀座板总成和活塞环组件拆解、测量和计算,发现阀座板卸荷孔密封区的轮廓度异常是导致容积流量衰减的直接原因。对比测量阀座板不同部位的表面硬度和金相组织,发现持续高温导致微观金相组织扩散是容积流量衰减的根本原因。最后,将阀座板由铝合金更换为铸铁,并进行台架试验验证。

The authors study factors affecting the attenuation of performance indexes as the volume flow of the commercial vehicle air compressor.After the durability test,they disassemble,measure,and estimate the valve installation plate and piston ring assembly.They find the abnormal profile tolerance of the sealing area around the unloading hole of the valve installation plate is the direct cause of the attenuation of volume flow.By comparing the measured rigidity and metallography of different surfaces on the valve installation plate,they find that the continuous high temperature causes the metallographic structure diffusion to be the root reason for the attenuation of volume flow.Finally,they replace aluminum alloy with cast iron for the value installation plate and do verification by the bench test.