论文部分内容阅读
西德MWH公司已研制出並生产出了无导翼气阀旋转机构(图1)。该公司声称,实际使用已证明这种转阀机构可使排气阀的大修期延长1～4倍。气阀使用寿命的延长,乃归功于无导翼气阀旋转机构具有诸多优点。例如,阀面温度分布均匀,可降低温度峰值,从而降低热应力和腐蚀灵敏度。在关闭行程中,气阀的旋转对阀座面不断地进行抛光,从而把燃烧残烬清除掉。该公司介绍说,由于气阀
West Germany MWH company has developed and produced a non-guided wing valve rotary mechanism (Figure 1). The company claims that the actual use has proved that this rotary valve mechanism can extend the overhaul of the exhaust valve 1 to 4 times. Valve life extension, is attributed to non-guided wing valve rotary mechanism has many advantages. For example, a uniform valve surface temperature profile reduces peak temperature and therefore thermal stress and corrosion sensitivity. During the closing stroke, the valve seat surface is continuously rotated by the rotation of the valve to remove the burning debris. The company said that due to the gas valve