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随着内燃机生产的日益发展,要求气门在高速、高温等苛刻的工作条件下具有良好的耐久性。如果在发动和工作时,使气门相对气门座旋转,气门密封断面的工作情况就会得到改善,可延长气门使用寿命。 气门旋转机构能有效地均衡气门各部的温升,避免局部热变形引起的高温有害气体的冲刷,减少热腐蚀和热疲劳;同时由于气门能够缓慢地旋转,在密封断面上产生轻微的摩擦,有自洁作用,防止沉积物的形成,减少气门的磨损,可使气门的使用寿命提高。 国外发动机上已较普遍采用了气门旋转
With the development of internal combustion engine production, the valve is required to have good durability under harsh working conditions such as high speed and high temperature. If you start and work, the valve relative to the valve seat rotation, valve seal cross-section of the work will be improved, can extend the life of the valve. The valve rotating mechanism can effectively balance the temperature rise of various parts of the valve to avoid the erosion of high temperature harmful gas caused by local thermal deformation and reduce the hot corrosion and thermal fatigue; meanwhile, because the valve can rotate slowly, slight friction occurs in the sealing section, Self-cleaning role to prevent the formation of sediments to reduce valve wear, valve life can be improved. Foreign engines have been more commonly used valve rotation