摘要
锥阀在工作中经常发生不稳定现象,与阀芯系统的阻尼较低有着直接关系。阀口进出口油路上加设阻尼孔等方法可有效改善锥阀的稳定性,但是存在节流损失和降低阀的抗污染能力等缺点。提出了一种新的阻尼调压装置,安装在锥阀的加载端,用来改善锥阀的压力稳定性。该调压装置拥有节流孔和容积腔室组成的阻尼系统,能够较好缓冲阀芯在响应过程中的压力冲击。同时,该阻尼系统设置在加载端,不参与阀芯进口和出口油路上的节流控制,不增加锥阀的节流损失。利用系统动力学方法仿真计算了新型调压装置的压力调节特性,分析了其压力减振能力。根据计算结果设计并制作了样机进行试验测试,结果表明该新型调压装置具有较好的阻尼减振能力,有效降低了锥阀的压力超调。
The unsteady phenomenon of poppet valve often happens during its work which is directly related to the low damp of poppet sys- tem. The method such as adding orifice in the inlet and outlet of valve port can improve effectively the stability, but which have the disad- vantages such as throttling loss and decreasing the anti-pollution ability. A kind of new damp pressure-adjusting method is put forward so as to improve the stability of poppet. The damping unit is taken as the example to analyze its principle and characteristics. It is set at the load- ing end so as to improve the pressure stability of poppet valve. This damping unit is consisted of orifice and volume chamber, which can slow down the pressure impact during the response of valve. Furthermore, this damping system is set at the loading end and wouldn＇ t cause throttling along the oil flowing way of valve, so the throttling loss wouldn＇ t be added. The system dynamic method is used to calculate the pressure-adjusting characteristics of this new unit and analyze its pressure-damping ability. According to the calculation, the prototype is designed, manufactured and tested, The results indicate that this new unit has further damping ability and can effectively decrease its pressure overshoot.
出处
《液压气动与密封》
2016年第8期30-33,共4页
Hydraulics Pneumatics & Seals
关键词
锥阀
加载端
阻尼
压力超调
容积腔
poppet valve
loading end
damping
pressure overshoot
volume chamber
