摘要
目前挖掘机油缸前腔缓冲普遍采用导向套、缓冲套与节流孔组合的结构形式,通过调整导向套内置节流孔孔径确保缓冲性能达到设计要求。但该结构形式相对复杂,节流孔孔径较小,油液污染易导致堵塞而影响缓冲性能。因此,该文针对某型挖掘机油缸无节流孔非调节形式的导向套、缓冲套组合前腔缓冲结构开展研究。将缓冲结构划分为圆锥段缓冲、斜面段缓冲与末端缓冲三个阶段,结合缓冲压力测试曲线分析了节流孔孔径在三个阶段产生的影响。采用缓冲结构等节流面积原则,将缓冲套斜面设计为等效截面,并通过仿真分析验证了其对缓冲性能的影响。仿真结果表明:通过缓冲套斜面优化,可实现非调节形式的前腔缓冲,在简化缓冲结构的同时提高缓冲可靠性。仿真结果为该型油缸缓冲结构优化提供了参考。
Now the rod head buffering structure of hydraulic cylinder assembled by guide sleeve, buffering sets and orifice, by adjust the di-ameter of orifice that installed in guide sleeve to guarantee the buffering performance satisfied the design requirement. But this type of struc-ture complexity, diameter of orifice small, contamination of oil can block the orifice easily and influence the buffering performance. Study the non-regulative buffering structure on the excavator make up by buffering sets and guide sleeve that removal the orifice. Divide the buff-ering structure to three stage： cone buffering stage, slope buffering stage and end buffering stage, combined with buffering pressure curve analysis the influence of orifice diameter in three stage. Use identical area principle, the slope of buffering sets was designed to equivalent ar-ea, by simulation verify the influence of this new structure.The simulation results showed： by optimize the slope of buffering sets, can real-ize the non-regulative structure rod head buffering structure, simplify the buffering structure at the same time improve the reliability.The sim-ulation results provided the reference to optimize the buffering structure of this cylinder.
出处
《液压气动与密封》
2017年第6期35-38,共4页
Hydraulics Pneumatics & Seals
关键词
前腔缓冲
非调节结构
导向套
缓冲套
液压挖掘机
rod head buffering structure
non-regulative structure
guide sleeve
buffering sets
hydraulic excavator
