一种高性能发动机气缸套的研制

Study on a Kind of High Performance Engine Cylinder Liner

为提高发动机气缸套适应复杂工况的需要,要求毛坯在整个长度内均匀顺序凝固,并尽可能减少内外壁硬度和组织差异。通过卧式离心浇注温度场数值模拟,优化设计缸套毛坯的模具结构,降低毛坯废品率;采用高精度的科里奥利质量流量计的气缸套涂料流量控制系统,同时在离心浇铸金属模具上增加高温传感器,实现根据模温的检测结果对涂料量进行实时控制。结果表明,产品性能符合标准要求,涂料使用更加精确。

In order to improve the cylinder sleeve adaption requirements to the complicated working condition,it is required that the work blank should be solidified evenly and sequentially within the entire length.Meanwhile,the hardness and metallographic difference between inner and outer walls should be reduced as much as possible.A numerical simulation was conducted via horizontal centrifugal casting temperature field to optimize the design for the mold structure of the cylinder sleeve work blank,reducing the rejection rate of the work blank.The cylinder sleeve coating flow control system of the high-precision Coriolis mass flow meter was used and a high temperature sensor was added on the centrifugal casting metal mold to achieve the real-time control of the coating volume based on the testing results of the mold temperature.The results show that the product performance accords with standard requirements and the coating dosage is more accurate.